diff --git a/main.go b/main.go
index 1327e7c..d523fb5 100644
--- a/main.go
+++ b/main.go
@@ -2,6 +2,7 @@ package gb28181
 
 import (
 	"log"
+	"math/rand"
 	"net"
 	"net/http"
 	"strconv"
@@ -18,12 +19,14 @@ import (
 
 var Devices sync.Map
 var config = struct {
-	Serial     string
-	Realm      string
-	ListenAddr string
-	Expires    int
-	AutoInvite bool
-}{"34020000002000000001", "3402000000", "127.0.0.1:5060", 3600, true}
+	Serial       string
+	Realm        string
+	ListenAddr   string
+	Expires      int
+	AutoInvite   bool
+	MediaPortMin uint16
+	MediaPortMax uint16
+}{"34020000002000000001", "3402000000", "127.0.0.1:5060", 3600, true, 58200, 58300}
 
 func init() {
 	InstallPlugin(&PluginConfig{
@@ -55,8 +58,8 @@ func run() {
 
 		AudioEnable:      true,
 		WaitKeyFrame:     true,
-		MediaPortMin:     58200,
-		MediaPortMax:     58300,
+		MediaPortMin:     config.MediaPortMin,
+		MediaPortMax:     config.MediaPortMax,
 		MediaIdleTimeout: 30,
 	}
 	s := transaction.NewCore(config)
@@ -119,7 +122,6 @@ func run() {
 	})
 	s.Start()
 }
-
 func onPublish(channel *transaction.Channel) (port int) {
 	rtpPublisher := new(rtp.RTP_PS)
 	if !rtpPublisher.Publish("gb28181/" + channel.DeviceID) {
@@ -131,19 +133,28 @@ func onPublish(channel *transaction.Channel) (port int) {
 		}
 	}()
 	rtpPublisher.Type = "GB28181"
-	addr, err := net.ResolveUDPAddr("udp", ":0")
-	if err != nil {
-		return
+	var conn *net.UDPConn
+	var err error
+	rang := int(config.MediaPortMax - config.MediaPortMin)
+	for count := rang; count > 0; count-- {
+		randNum := rand.Intn(rang)
+		port = int(config.MediaPortMin) + randNum
+		addr, _ := net.ResolveUDPAddr("udp", ":"+strconv.Itoa(port))
+		conn, err = net.ListenUDP("udp", addr)
+		if err != nil {
+			continue
+		} else {
+			break
+		}
 	}
-	conn, err := net.ListenUDP("udp", addr)
 	if err != nil {
 		return
 	}
 	networkBuffer := 1048576
-	if err := conn.SetReadBuffer(networkBuffer); err != nil {
+	if err = conn.SetReadBuffer(networkBuffer); err != nil {
 		Printf("udp server video conn set read buffer error, %v", err)
 	}
-	if err := conn.SetWriteBuffer(networkBuffer); err != nil {
+	if err = conn.SetWriteBuffer(networkBuffer); err != nil {
 		Printf("udp server video conn set write buffer error, %v", err)
 	}
 	la := conn.LocalAddr().String()
diff --git a/transaction/core.go b/transaction/core.go
index 6d1cf6a..d0cbae5 100644
--- a/transaction/core.go
+++ b/transaction/core.go
@@ -460,7 +460,7 @@ func (c *Core) AddDevice(msg *sip.Message) *Device {
 		core:         c,
 		from:         &sip.Contact{Uri: msg.StartLine.Uri, Params: make(map[string]string)},
 		to:           msg.To,
-		addr:         msg.Via.GetSendBy(),
+		Addr:         msg.Via.GetSendBy(),
 	}
 	c.Devices.Store(msg.From.Uri.UserInfo(), v)
 	return v
diff --git a/transaction/device.go b/transaction/device.go
index f2bb3c0..dd4a123 100644
--- a/transaction/device.go
+++ b/transaction/device.go
@@ -36,7 +36,7 @@ type Device struct {
 	sn           int
 	from         *sip.Contact
 	to           *sip.Contact
-	addr         string
+	Addr         string
 }
 
 func (c *Core) RemoveDead() {
@@ -100,7 +100,7 @@ func (d *Device) CreateMessage(Method sip.Method) (requestMsg *sip.Message) {
 			ID:     1,
 			Method: Method,
 		}, CallID: utils.RandNumString(10),
-		Addr: d.addr,
+		Addr: d.Addr,
 	}
 	requestMsg.From.Params["tag"] = utils.RandNumString(9)
 	return
diff --git a/ui/dist/plugin-gb28181.common.js b/ui/dist/plugin-gb28181.common.js
index 70c2522..d10fac6 100644
--- a/ui/dist/plugin-gb28181.common.js
+++ b/ui/dist/plugin-gb28181.common.js
@@ -82,23 +82,12 @@ module.exports =
 /******/
 /******/
 /******/ 	// Load entry module and return exports
-/******/ 	return __webpack_require__(__webpack_require__.s = "fb15");
+/******/ 	return __webpack_require__(__webpack_require__.s = "deee");
 /******/ })
 /************************************************************************/
 /******/ ({
 
-/***/ "040c":
-/***/ (function(module, __webpack_exports__, __webpack_require__) {
-
-"use strict";
-/* harmony import */ var _node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_76558468_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("d989");
-/* harmony import */ var _node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_76558468_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_76558468_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__);
-/* unused harmony reexport * */
-
-
-/***/ }),
-
-/***/ "1fb5":
+/***/ "0c57":
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -258,951 +247,598 @@ function fromByteArray (uint8) {
 
 /***/ }),
 
-/***/ "2d55":
-/***/ (function(module, exports, __webpack_require__) {
+/***/ "0cd2":
+/***/ (function(module, __webpack_exports__, __webpack_require__) {
 
-// extracted by mini-css-extract-plugin
+"use strict";
+/* harmony import */ var _plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_7bad0327_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("df72");
+/* harmony import */ var _plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_7bad0327_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_7bad0327_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__);
+/* unused harmony reexport * */
+ /* unused harmony default export */ var _unused_webpack_default_export = (_plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_7bad0327_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default.a); 
 
 /***/ }),
 
-/***/ "4296":
+/***/ "2d15":
 /***/ (function(module, __webpack_exports__, __webpack_require__) {
 
 "use strict";
-/* harmony import */ var _node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_77f8f0e9_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("dc29");
-/* harmony import */ var _node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_77f8f0e9_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_77f8f0e9_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__);
+/* harmony import */ var _plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_a6774e8e_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("9e83");
+/* harmony import */ var _plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_a6774e8e_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_a6774e8e_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__);
 /* unused harmony reexport * */
-
+ /* unused harmony default export */ var _unused_webpack_default_export = (_plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_a6774e8e_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default.a); 
 
 /***/ }),
 
-/***/ "8875":
+/***/ "32dd":
 /***/ (function(module, exports, __webpack_require__) {
 
-var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_DEFINE_RESULT__;// addapted from the document.currentScript polyfill by Adam Miller
-// MIT license
-// source: https://github.com/amiller-gh/currentScript-polyfill
-
-// added support for Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=1620505
-
-(function (root, factory) {
-  if (true) {
-    !(__WEBPACK_AMD_DEFINE_ARRAY__ = [], __WEBPACK_AMD_DEFINE_FACTORY__ = (factory),
-				__WEBPACK_AMD_DEFINE_RESULT__ = (typeof __WEBPACK_AMD_DEFINE_FACTORY__ === 'function' ?
-				(__WEBPACK_AMD_DEFINE_FACTORY__.apply(exports, __WEBPACK_AMD_DEFINE_ARRAY__)) : __WEBPACK_AMD_DEFINE_FACTORY__),
-				__WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
-  } else {}
-}(typeof self !== 'undefined' ? self : this, function () {
-  function getCurrentScript () {
-    var descriptor = Object.getOwnPropertyDescriptor(document, 'currentScript')
-    // for chrome
-    if (!descriptor && 'currentScript' in document && document.currentScript) {
-      return document.currentScript
-    }
-
-    // for other browsers with native support for currentScript
-    if (descriptor && descriptor.get !== getCurrentScript && document.currentScript) {
-      return document.currentScript
-    }
-  
-    // IE 8-10 support script readyState
-    // IE 11+ & Firefox support stack trace
-    try {
-      throw new Error();
-    }
-    catch (err) {
-      // Find the second match for the "at" string to get file src url from stack.
-      var ieStackRegExp = /.*at [^(]*\((.*):(.+):(.+)\)$/ig,
-        ffStackRegExp = /@([^@]*):(\d+):(\d+)\s*$/ig,
-        stackDetails = ieStackRegExp.exec(err.stack) || ffStackRegExp.exec(err.stack),
-        scriptLocation = (stackDetails && stackDetails[1]) || false,
-        line = (stackDetails && stackDetails[2]) || false,
-        currentLocation = document.location.href.replace(document.location.hash, ''),
-        pageSource,
-        inlineScriptSourceRegExp,
-        inlineScriptSource,
-        scripts = document.getElementsByTagName('script'); // Live NodeList collection
-  
-      if (scriptLocation === currentLocation) {
-        pageSource = document.documentElement.outerHTML;
-        inlineScriptSourceRegExp = new RegExp('(?:[^\\n]+?\\n){0,' + (line - 2) + '}[^<]*<script>([\\d\\D]*?)<\\/script>[\\d\\D]*', 'i');
-        inlineScriptSource = pageSource.replace(inlineScriptSourceRegExp, '$1').trim();
-      }
-  
-      for (var i = 0; i < scripts.length; i++) {
-        // If ready state is interactive, return the script tag
-        if (scripts[i].readyState === 'interactive') {
-          return scripts[i];
-        }
-  
-        // If src matches, return the script tag
-        if (scripts[i].src === scriptLocation) {
-          return scripts[i];
-        }
-  
-        // If inline source matches, return the script tag
-        if (
-          scriptLocation === currentLocation &&
-          scripts[i].innerHTML &&
-          scripts[i].innerHTML.trim() === inlineScriptSource
-        ) {
-          return scripts[i];
-        }
-      }
-  
-      // If no match, return null
-      return null;
-    }
-  };
+"use strict";
+/* WEBPACK VAR INJECTION */(function(global) {/*!
+ * The buffer module from node.js, for the browser.
+ *
+ * @author   Feross Aboukhadijeh <http://feross.org>
+ * @license  MIT
+ */
+/* eslint-disable no-proto */
 
-  return getCurrentScript
-}));
 
 
-/***/ }),
+var base64 = __webpack_require__("0c57")
+var ieee754 = __webpack_require__("99fc")
+var isArray = __webpack_require__("5f9f")
 
-/***/ "88a2":
-/***/ (function(module, __webpack_exports__, __webpack_require__) {
+exports.Buffer = Buffer
+exports.SlowBuffer = SlowBuffer
+exports.INSPECT_MAX_BYTES = 50
 
-"use strict";
-/* WEBPACK VAR INJECTION */(function(Buffer) {/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "b", function() { return getPTZCmd; });
-/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() { return PTZ_TYPE; });
 /**
- * Date:2020/11/9
- * Desc:
+ * If `Buffer.TYPED_ARRAY_SUPPORT`:
+ *   === true    Use Uint8Array implementation (fastest)
+ *   === false   Use Object implementation (most compatible, even IE6)
+ *
+ * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
+ * Opera 11.6+, iOS 4.2+.
+ *
+ * Due to various browser bugs, sometimes the Object implementation will be used even
+ * when the browser supports typed arrays.
+ *
+ * Note:
+ *
+ *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
+ *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
+ *
+ *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
+ *
+ *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
+ *     incorrect length in some situations.
+
+ * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
+ * get the Object implementation, which is slower but behaves correctly.
  */
-/**
- * Date:2020/11/2
- * Desc: ptz cmd 封装
- * cmd[0] //首字节以05H开头
- * cmd[1] //组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码
- *        //  校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16
- * cmd[2] //地址的低8位？？？什么地址，地址范围000h ~ FFFh(0~4095),其中000h为广播地址
- * cmd[3] //指令码
- * cmd[4] //数据1,水平控制速度、聚焦速度
- * cmd[5] //数据2，垂直控制速度、光圈速度
- * cmd[6] // 高4位为数据3=变倍控制速度，低4位为地址高4位
+Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
+  ? global.TYPED_ARRAY_SUPPORT
+  : typedArraySupport()
+
+/*
+ * Export kMaxLength after typed array support is determined.
  */
+exports.kMaxLength = kMaxLength()
 
-const PTZ_TYPE = {
-    stop: 'stop',
-    right: 'right',
-    left: 'left',
-    up: 'up',
-    down: 'down',
-    leftUp: 'leftUp',
-    leftDown: 'leftDown',
-    rightUp: 'rightUp',
-    rightDown: 'rightDown',
-    zoomFar: 'zoomFar',
-    zoomNear: 'zoomNear',
-    apertureFar: 'apertureFar',
-    apertureNear: 'apertureNear',
-    focusFar: 'focusFar',
-    focusNear: 'focusNear',
-    setPos: 'setPos',
-    calPos: 'calPos',
-    delPos: 'delPos'
-};
+function typedArraySupport () {
+  try {
+    var arr = new Uint8Array(1)
+    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}
+    return arr.foo() === 42 && // typed array instances can be augmented
+        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
+        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
+  } catch (e) {
+    return false
+  }
+}
 
-const PTZ_CMD_TYPE = {
-    stop: 0x00,
+function kMaxLength () {
+  return Buffer.TYPED_ARRAY_SUPPORT
+    ? 0x7fffffff
+    : 0x3fffffff
+}
 
-    right: 0x01,
-    left: 0x02,
-    up: 0x08,
-    down: 0x04,
+function createBuffer (that, length) {
+  if (kMaxLength() < length) {
+    throw new RangeError('Invalid typed array length')
+  }
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    // Return an augmented `Uint8Array` instance, for best performance
+    that = new Uint8Array(length)
+    that.__proto__ = Buffer.prototype
+  } else {
+    // Fallback: Return an object instance of the Buffer class
+    if (that === null) {
+      that = new Buffer(length)
+    }
+    that.length = length
+  }
 
-    leftUp: 0x0A,
-    leftDown: 0x06,
-    rightUp: 0x09,
-    rightDown: 0x05,
+  return that
+}
 
-    zoomFar: 0x10, // 镜头 放大
-    zoomNear: 0x20,  // 镜头 缩小
+/**
+ * The Buffer constructor returns instances of `Uint8Array` that have their
+ * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
+ * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
+ * and the `Uint8Array` methods. Square bracket notation works as expected -- it
+ * returns a single octet.
+ *
+ * The `Uint8Array` prototype remains unmodified.
+ */
 
-    apertureFar: 0x48, // 光圈 缩小
-    apertureNear: 0x44, // 光圈 放大
+function Buffer (arg, encodingOrOffset, length) {
+  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {
+    return new Buffer(arg, encodingOrOffset, length)
+  }
 
-    focusFar: 0x42, // 聚焦 近
-    focusNear: 0x41, // 聚焦 远
+  // Common case.
+  if (typeof arg === 'number') {
+    if (typeof encodingOrOffset === 'string') {
+      throw new Error(
+        'If encoding is specified then the first argument must be a string'
+      )
+    }
+    return allocUnsafe(this, arg)
+  }
+  return from(this, arg, encodingOrOffset, length)
+}
 
-    setPos: 0x81,
-    calPos: 0x82,
-    delPos: 0x83
-};
+Buffer.poolSize = 8192 // not used by this implementation
 
-const SPEED_ARRAY = [0x19, 0x32, 0x4b, 0x64, 0x7d, 0x96, 0xAF, 0xC8, 0xE1, 0xFA];
-const POSITION_ARRAY = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10];
+// TODO: Legacy, not needed anymore. Remove in next major version.
+Buffer._augment = function (arr) {
+  arr.__proto__ = Buffer.prototype
+  return arr
+}
 
-// 获取 direction 方向型
-/**
- *
- * @param options
- *        type:
- *        speed:default 5
- *        index:
- * @returns {string}
- */
-function getPTZCmd(options) {
-    const {type, speed, index} = options;
-    const ptzSpeed = getPTZSpeed(speed);
-    let indexValue3, indexValue4, indexValue5, indexValue6;
-    indexValue3 = PTZ_CMD_TYPE[type];
-    switch (type) {
-        case PTZ_TYPE.up:
-        case PTZ_TYPE.down:
-        case PTZ_TYPE.apertureFar:
-        case PTZ_TYPE.apertureNear:
-            indexValue5 = ptzSpeed;
-            break;
-        case PTZ_TYPE.right:
-        case PTZ_TYPE.left:
-        case PTZ_TYPE.focusFar:
-        case PTZ_TYPE.focusNear:
-            indexValue4 = ptzSpeed;
-            break;
-        case PTZ_TYPE.leftUp:
-        case PTZ_TYPE.leftDown:
-        case PTZ_TYPE.rightUp:
-        case PTZ_TYPE.rightDown:
-            indexValue4 = ptzSpeed;
-            indexValue5 = ptzSpeed;
-            break;
-        case PTZ_TYPE.zoomFar:
-        case PTZ_TYPE.zoomNear:
-            indexValue6 = 0x10;
-            break;
-        case PTZ_TYPE.calPos:
-        case PTZ_TYPE.delPos:
-        case PTZ_TYPE.setPos:
-            indexValue5 = getPTZPositionIndex(index);
-            break;
-        default:
-            break;
-    }
-    return ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6);
+function from (that, value, encodingOrOffset, length) {
+  if (typeof value === 'number') {
+    throw new TypeError('"value" argument must not be a number')
+  }
+
+  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {
+    return fromArrayBuffer(that, value, encodingOrOffset, length)
+  }
+
+  if (typeof value === 'string') {
+    return fromString(that, value, encodingOrOffset)
+  }
+
+  return fromObject(that, value)
 }
 
-function getPTZSpeed(speed) {
-    speed = speed || 5;
-    const speedIndex = speed - 1;
-    const ptzSpeed = SPEED_ARRAY[speedIndex] || SPEED_ARRAY[4];
-    return ptzSpeed;
+/**
+ * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
+ * if value is a number.
+ * Buffer.from(str[, encoding])
+ * Buffer.from(array)
+ * Buffer.from(buffer)
+ * Buffer.from(arrayBuffer[, byteOffset[, length]])
+ **/
+Buffer.from = function (value, encodingOrOffset, length) {
+  return from(null, value, encodingOrOffset, length)
 }
 
-function getPTZPositionIndex(index) {
-    return POSITION_ARRAY[index - 1];
+if (Buffer.TYPED_ARRAY_SUPPORT) {
+  Buffer.prototype.__proto__ = Uint8Array.prototype
+  Buffer.__proto__ = Uint8Array
+  if (typeof Symbol !== 'undefined' && Symbol.species &&
+      Buffer[Symbol.species] === Buffer) {
+    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
+    Object.defineProperty(Buffer, Symbol.species, {
+      value: null,
+      configurable: true
+    })
+  }
 }
 
-function ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6) {
-    //
-    let cmd = Buffer.alloc(8);
-    // 首字节以05H开头
-    cmd[0] = 0xA5;
-    // 组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码
-    cmd[1] = 0x0F;
-    // 校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16
-    cmd[2] = 0x01;
-    //
-    if (indexValue3) {
-        cmd[3] = indexValue3;
-    }
-    if (indexValue4) {
-        cmd[4] = indexValue4;
-    }
-    if (indexValue5) {
-        cmd[5] = indexValue5;
-    }
-    if (indexValue6) {
-        cmd[6] = indexValue6;
-    }
+function assertSize (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('"size" argument must be a number')
+  } else if (size < 0) {
+    throw new RangeError('"size" argument must not be negative')
+  }
+}
 
-    cmd[7] = (cmd[0] + cmd[1] + cmd[2] + cmd[3] + cmd[4] + cmd[5] + cmd[6]) % 256;
+function alloc (that, size, fill, encoding) {
+  assertSize(size)
+  if (size <= 0) {
+    return createBuffer(that, size)
+  }
+  if (fill !== undefined) {
+    // Only pay attention to encoding if it's a string. This
+    // prevents accidentally sending in a number that would
+    // be interpretted as a start offset.
+    return typeof encoding === 'string'
+      ? createBuffer(that, size).fill(fill, encoding)
+      : createBuffer(that, size).fill(fill)
+  }
+  return createBuffer(that, size)
+}
 
-    return bytes2HexString(cmd);
+/**
+ * Creates a new filled Buffer instance.
+ * alloc(size[, fill[, encoding]])
+ **/
+Buffer.alloc = function (size, fill, encoding) {
+  return alloc(null, size, fill, encoding)
 }
 
-function bytes2HexString(byte) {
-    let hexs = "";
-    for (let i = 0; i < byte.length; i++) {
-        let hex = (byte[i]).toString(16);
-        if (hex.length === 1) {
-            hex = '0' + hex;
-        }
-        hexs += hex.toUpperCase();
+function allocUnsafe (that, size) {
+  assertSize(size)
+  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)
+  if (!Buffer.TYPED_ARRAY_SUPPORT) {
+    for (var i = 0; i < size; ++i) {
+      that[i] = 0
     }
-    return hexs;
+  }
+  return that
 }
 
+/**
+ * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
+ * */
+Buffer.allocUnsafe = function (size) {
+  return allocUnsafe(null, size)
+}
+/**
+ * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
+ */
+Buffer.allocUnsafeSlow = function (size) {
+  return allocUnsafe(null, size)
+}
 
+function fromString (that, string, encoding) {
+  if (typeof encoding !== 'string' || encoding === '') {
+    encoding = 'utf8'
+  }
 
-/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__("b639").Buffer))
+  if (!Buffer.isEncoding(encoding)) {
+    throw new TypeError('"encoding" must be a valid string encoding')
+  }
 
-/***/ }),
+  var length = byteLength(string, encoding) | 0
+  that = createBuffer(that, length)
 
-/***/ "9152":
-/***/ (function(module, exports) {
+  var actual = that.write(string, encoding)
 
-/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
-exports.read = function (buffer, offset, isLE, mLen, nBytes) {
-  var e, m
-  var eLen = (nBytes * 8) - mLen - 1
-  var eMax = (1 << eLen) - 1
-  var eBias = eMax >> 1
-  var nBits = -7
-  var i = isLE ? (nBytes - 1) : 0
-  var d = isLE ? -1 : 1
-  var s = buffer[offset + i]
+  if (actual !== length) {
+    // Writing a hex string, for example, that contains invalid characters will
+    // cause everything after the first invalid character to be ignored. (e.g.
+    // 'abxxcd' will be treated as 'ab')
+    that = that.slice(0, actual)
+  }
 
-  i += d
+  return that
+}
 
-  e = s & ((1 << (-nBits)) - 1)
-  s >>= (-nBits)
-  nBits += eLen
-  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+function fromArrayLike (that, array) {
+  var length = array.length < 0 ? 0 : checked(array.length) | 0
+  that = createBuffer(that, length)
+  for (var i = 0; i < length; i += 1) {
+    that[i] = array[i] & 255
+  }
+  return that
+}
 
-  m = e & ((1 << (-nBits)) - 1)
-  e >>= (-nBits)
-  nBits += mLen
-  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+function fromArrayBuffer (that, array, byteOffset, length) {
+  array.byteLength // this throws if `array` is not a valid ArrayBuffer
 
-  if (e === 0) {
-    e = 1 - eBias
-  } else if (e === eMax) {
-    return m ? NaN : ((s ? -1 : 1) * Infinity)
-  } else {
-    m = m + Math.pow(2, mLen)
-    e = e - eBias
+  if (byteOffset < 0 || array.byteLength < byteOffset) {
+    throw new RangeError('\'offset\' is out of bounds')
   }
-  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
-}
 
-exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
-  var e, m, c
-  var eLen = (nBytes * 8) - mLen - 1
-  var eMax = (1 << eLen) - 1
-  var eBias = eMax >> 1
-  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
-  var i = isLE ? 0 : (nBytes - 1)
-  var d = isLE ? 1 : -1
-  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
+  if (array.byteLength < byteOffset + (length || 0)) {
+    throw new RangeError('\'length\' is out of bounds')
+  }
 
-  value = Math.abs(value)
+  if (byteOffset === undefined && length === undefined) {
+    array = new Uint8Array(array)
+  } else if (length === undefined) {
+    array = new Uint8Array(array, byteOffset)
+  } else {
+    array = new Uint8Array(array, byteOffset, length)
+  }
 
-  if (isNaN(value) || value === Infinity) {
-    m = isNaN(value) ? 1 : 0
-    e = eMax
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    // Return an augmented `Uint8Array` instance, for best performance
+    that = array
+    that.__proto__ = Buffer.prototype
   } else {
-    e = Math.floor(Math.log(value) / Math.LN2)
-    if (value * (c = Math.pow(2, -e)) < 1) {
-      e--
-      c *= 2
-    }
-    if (e + eBias >= 1) {
-      value += rt / c
-    } else {
-      value += rt * Math.pow(2, 1 - eBias)
-    }
-    if (value * c >= 2) {
-      e++
-      c /= 2
-    }
-
-    if (e + eBias >= eMax) {
-      m = 0
-      e = eMax
-    } else if (e + eBias >= 1) {
-      m = ((value * c) - 1) * Math.pow(2, mLen)
-      e = e + eBias
-    } else {
-      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
-      e = 0
-    }
+    // Fallback: Return an object instance of the Buffer class
+    that = fromArrayLike(that, array)
   }
-
-  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
-
-  e = (e << mLen) | m
-  eLen += mLen
-  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
-
-  buffer[offset + i - d] |= s * 128
+  return that
 }
 
+function fromObject (that, obj) {
+  if (Buffer.isBuffer(obj)) {
+    var len = checked(obj.length) | 0
+    that = createBuffer(that, len)
 
-/***/ }),
-
-/***/ "b639":
-/***/ (function(module, exports, __webpack_require__) {
-
-"use strict";
-/* WEBPACK VAR INJECTION */(function(global) {/*!
- * The buffer module from node.js, for the browser.
- *
- * @author   Feross Aboukhadijeh <http://feross.org>
- * @license  MIT
- */
-/* eslint-disable no-proto */
-
-
+    if (that.length === 0) {
+      return that
+    }
 
-var base64 = __webpack_require__("1fb5")
-var ieee754 = __webpack_require__("9152")
-var isArray = __webpack_require__("e3db")
+    obj.copy(that, 0, 0, len)
+    return that
+  }
 
-exports.Buffer = Buffer
-exports.SlowBuffer = SlowBuffer
-exports.INSPECT_MAX_BYTES = 50
+  if (obj) {
+    if ((typeof ArrayBuffer !== 'undefined' &&
+        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {
+      if (typeof obj.length !== 'number' || isnan(obj.length)) {
+        return createBuffer(that, 0)
+      }
+      return fromArrayLike(that, obj)
+    }
 
-/**
- * If `Buffer.TYPED_ARRAY_SUPPORT`:
- *   === true    Use Uint8Array implementation (fastest)
- *   === false   Use Object implementation (most compatible, even IE6)
- *
- * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
- * Opera 11.6+, iOS 4.2+.
- *
- * Due to various browser bugs, sometimes the Object implementation will be used even
- * when the browser supports typed arrays.
- *
- * Note:
- *
- *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
- *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
- *
- *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
- *
- *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
- *     incorrect length in some situations.
+    if (obj.type === 'Buffer' && isArray(obj.data)) {
+      return fromArrayLike(that, obj.data)
+    }
+  }
 
- * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
- * get the Object implementation, which is slower but behaves correctly.
- */
-Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
-  ? global.TYPED_ARRAY_SUPPORT
-  : typedArraySupport()
+  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
+}
 
-/*
- * Export kMaxLength after typed array support is determined.
- */
-exports.kMaxLength = kMaxLength()
+function checked (length) {
+  // Note: cannot use `length < kMaxLength()` here because that fails when
+  // length is NaN (which is otherwise coerced to zero.)
+  if (length >= kMaxLength()) {
+    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
+                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
+  }
+  return length | 0
+}
 
-function typedArraySupport () {
-  try {
-    var arr = new Uint8Array(1)
-    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}
-    return arr.foo() === 42 && // typed array instances can be augmented
-        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
-        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
-  } catch (e) {
-    return false
+function SlowBuffer (length) {
+  if (+length != length) { // eslint-disable-line eqeqeq
+    length = 0
   }
+  return Buffer.alloc(+length)
 }
 
-function kMaxLength () {
-  return Buffer.TYPED_ARRAY_SUPPORT
-    ? 0x7fffffff
-    : 0x3fffffff
+Buffer.isBuffer = function isBuffer (b) {
+  return !!(b != null && b._isBuffer)
 }
 
-function createBuffer (that, length) {
-  if (kMaxLength() < length) {
-    throw new RangeError('Invalid typed array length')
+Buffer.compare = function compare (a, b) {
+  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
+    throw new TypeError('Arguments must be Buffers')
   }
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    // Return an augmented `Uint8Array` instance, for best performance
-    that = new Uint8Array(length)
-    that.__proto__ = Buffer.prototype
-  } else {
-    // Fallback: Return an object instance of the Buffer class
-    if (that === null) {
-      that = new Buffer(length)
+
+  if (a === b) return 0
+
+  var x = a.length
+  var y = b.length
+
+  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
+    if (a[i] !== b[i]) {
+      x = a[i]
+      y = b[i]
+      break
     }
-    that.length = length
   }
 
-  return that
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
 }
 
-/**
- * The Buffer constructor returns instances of `Uint8Array` that have their
- * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
- * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
- * and the `Uint8Array` methods. Square bracket notation works as expected -- it
- * returns a single octet.
- *
- * The `Uint8Array` prototype remains unmodified.
- */
+Buffer.isEncoding = function isEncoding (encoding) {
+  switch (String(encoding).toLowerCase()) {
+    case 'hex':
+    case 'utf8':
+    case 'utf-8':
+    case 'ascii':
+    case 'latin1':
+    case 'binary':
+    case 'base64':
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      return true
+    default:
+      return false
+  }
+}
 
-function Buffer (arg, encodingOrOffset, length) {
-  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {
-    return new Buffer(arg, encodingOrOffset, length)
+Buffer.concat = function concat (list, length) {
+  if (!isArray(list)) {
+    throw new TypeError('"list" argument must be an Array of Buffers')
   }
 
-  // Common case.
-  if (typeof arg === 'number') {
-    if (typeof encodingOrOffset === 'string') {
-      throw new Error(
-        'If encoding is specified then the first argument must be a string'
-      )
-    }
-    return allocUnsafe(this, arg)
+  if (list.length === 0) {
+    return Buffer.alloc(0)
   }
-  return from(this, arg, encodingOrOffset, length)
-}
 
-Buffer.poolSize = 8192 // not used by this implementation
+  var i
+  if (length === undefined) {
+    length = 0
+    for (i = 0; i < list.length; ++i) {
+      length += list[i].length
+    }
+  }
 
-// TODO: Legacy, not needed anymore. Remove in next major version.
-Buffer._augment = function (arr) {
-  arr.__proto__ = Buffer.prototype
-  return arr
+  var buffer = Buffer.allocUnsafe(length)
+  var pos = 0
+  for (i = 0; i < list.length; ++i) {
+    var buf = list[i]
+    if (!Buffer.isBuffer(buf)) {
+      throw new TypeError('"list" argument must be an Array of Buffers')
+    }
+    buf.copy(buffer, pos)
+    pos += buf.length
+  }
+  return buffer
 }
 
-function from (that, value, encodingOrOffset, length) {
-  if (typeof value === 'number') {
-    throw new TypeError('"value" argument must not be a number')
+function byteLength (string, encoding) {
+  if (Buffer.isBuffer(string)) {
+    return string.length
   }
-
-  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {
-    return fromArrayBuffer(that, value, encodingOrOffset, length)
+  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&
+      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {
+    return string.byteLength
   }
-
-  if (typeof value === 'string') {
-    return fromString(that, value, encodingOrOffset)
+  if (typeof string !== 'string') {
+    string = '' + string
   }
 
-  return fromObject(that, value)
-}
+  var len = string.length
+  if (len === 0) return 0
 
-/**
- * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
- * if value is a number.
- * Buffer.from(str[, encoding])
- * Buffer.from(array)
- * Buffer.from(buffer)
- * Buffer.from(arrayBuffer[, byteOffset[, length]])
- **/
-Buffer.from = function (value, encodingOrOffset, length) {
-  return from(null, value, encodingOrOffset, length)
-}
-
-if (Buffer.TYPED_ARRAY_SUPPORT) {
-  Buffer.prototype.__proto__ = Uint8Array.prototype
-  Buffer.__proto__ = Uint8Array
-  if (typeof Symbol !== 'undefined' && Symbol.species &&
-      Buffer[Symbol.species] === Buffer) {
-    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
-    Object.defineProperty(Buffer, Symbol.species, {
-      value: null,
-      configurable: true
-    })
+  // Use a for loop to avoid recursion
+  var loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'ascii':
+      case 'latin1':
+      case 'binary':
+        return len
+      case 'utf8':
+      case 'utf-8':
+      case undefined:
+        return utf8ToBytes(string).length
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return len * 2
+      case 'hex':
+        return len >>> 1
+      case 'base64':
+        return base64ToBytes(string).length
+      default:
+        if (loweredCase) return utf8ToBytes(string).length // assume utf8
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
   }
 }
+Buffer.byteLength = byteLength
 
-function assertSize (size) {
-  if (typeof size !== 'number') {
-    throw new TypeError('"size" argument must be a number')
-  } else if (size < 0) {
-    throw new RangeError('"size" argument must not be negative')
-  }
-}
+function slowToString (encoding, start, end) {
+  var loweredCase = false
 
-function alloc (that, size, fill, encoding) {
-  assertSize(size)
-  if (size <= 0) {
-    return createBuffer(that, size)
+  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
+  // property of a typed array.
+
+  // This behaves neither like String nor Uint8Array in that we set start/end
+  // to their upper/lower bounds if the value passed is out of range.
+  // undefined is handled specially as per ECMA-262 6th Edition,
+  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
+  if (start === undefined || start < 0) {
+    start = 0
   }
-  if (fill !== undefined) {
-    // Only pay attention to encoding if it's a string. This
-    // prevents accidentally sending in a number that would
-    // be interpretted as a start offset.
-    return typeof encoding === 'string'
-      ? createBuffer(that, size).fill(fill, encoding)
-      : createBuffer(that, size).fill(fill)
+  // Return early if start > this.length. Done here to prevent potential uint32
+  // coercion fail below.
+  if (start > this.length) {
+    return ''
   }
-  return createBuffer(that, size)
-}
 
-/**
- * Creates a new filled Buffer instance.
- * alloc(size[, fill[, encoding]])
- **/
-Buffer.alloc = function (size, fill, encoding) {
-  return alloc(null, size, fill, encoding)
-}
+  if (end === undefined || end > this.length) {
+    end = this.length
+  }
 
-function allocUnsafe (that, size) {
-  assertSize(size)
-  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) {
-    for (var i = 0; i < size; ++i) {
-      that[i] = 0
-    }
+  if (end <= 0) {
+    return ''
   }
-  return that
-}
 
-/**
- * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
- * */
-Buffer.allocUnsafe = function (size) {
-  return allocUnsafe(null, size)
-}
-/**
- * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
- */
-Buffer.allocUnsafeSlow = function (size) {
-  return allocUnsafe(null, size)
-}
+  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
+  end >>>= 0
+  start >>>= 0
 
-function fromString (that, string, encoding) {
-  if (typeof encoding !== 'string' || encoding === '') {
-    encoding = 'utf8'
+  if (end <= start) {
+    return ''
   }
 
-  if (!Buffer.isEncoding(encoding)) {
-    throw new TypeError('"encoding" must be a valid string encoding')
-  }
+  if (!encoding) encoding = 'utf8'
 
-  var length = byteLength(string, encoding) | 0
-  that = createBuffer(that, length)
+  while (true) {
+    switch (encoding) {
+      case 'hex':
+        return hexSlice(this, start, end)
 
-  var actual = that.write(string, encoding)
+      case 'utf8':
+      case 'utf-8':
+        return utf8Slice(this, start, end)
 
-  if (actual !== length) {
-    // Writing a hex string, for example, that contains invalid characters will
-    // cause everything after the first invalid character to be ignored. (e.g.
-    // 'abxxcd' will be treated as 'ab')
-    that = that.slice(0, actual)
-  }
+      case 'ascii':
+        return asciiSlice(this, start, end)
 
-  return that
-}
+      case 'latin1':
+      case 'binary':
+        return latin1Slice(this, start, end)
 
-function fromArrayLike (that, array) {
-  var length = array.length < 0 ? 0 : checked(array.length) | 0
-  that = createBuffer(that, length)
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
-  }
-  return that
-}
+      case 'base64':
+        return base64Slice(this, start, end)
 
-function fromArrayBuffer (that, array, byteOffset, length) {
-  array.byteLength // this throws if `array` is not a valid ArrayBuffer
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return utf16leSlice(this, start, end)
 
-  if (byteOffset < 0 || array.byteLength < byteOffset) {
-    throw new RangeError('\'offset\' is out of bounds')
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = (encoding + '').toLowerCase()
+        loweredCase = true
+    }
   }
+}
 
-  if (array.byteLength < byteOffset + (length || 0)) {
-    throw new RangeError('\'length\' is out of bounds')
-  }
+// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect
+// Buffer instances.
+Buffer.prototype._isBuffer = true
 
-  if (byteOffset === undefined && length === undefined) {
-    array = new Uint8Array(array)
-  } else if (length === undefined) {
-    array = new Uint8Array(array, byteOffset)
-  } else {
-    array = new Uint8Array(array, byteOffset, length)
-  }
+function swap (b, n, m) {
+  var i = b[n]
+  b[n] = b[m]
+  b[m] = i
+}
 
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    // Return an augmented `Uint8Array` instance, for best performance
-    that = array
-    that.__proto__ = Buffer.prototype
-  } else {
-    // Fallback: Return an object instance of the Buffer class
-    that = fromArrayLike(that, array)
+Buffer.prototype.swap16 = function swap16 () {
+  var len = this.length
+  if (len % 2 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 16-bits')
   }
-  return that
+  for (var i = 0; i < len; i += 2) {
+    swap(this, i, i + 1)
+  }
+  return this
 }
 
-function fromObject (that, obj) {
-  if (Buffer.isBuffer(obj)) {
-    var len = checked(obj.length) | 0
-    that = createBuffer(that, len)
-
-    if (that.length === 0) {
-      return that
-    }
-
-    obj.copy(that, 0, 0, len)
-    return that
+Buffer.prototype.swap32 = function swap32 () {
+  var len = this.length
+  if (len % 4 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 32-bits')
   }
-
-  if (obj) {
-    if ((typeof ArrayBuffer !== 'undefined' &&
-        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {
-      if (typeof obj.length !== 'number' || isnan(obj.length)) {
-        return createBuffer(that, 0)
-      }
-      return fromArrayLike(that, obj)
-    }
-
-    if (obj.type === 'Buffer' && isArray(obj.data)) {
-      return fromArrayLike(that, obj.data)
-    }
+  for (var i = 0; i < len; i += 4) {
+    swap(this, i, i + 3)
+    swap(this, i + 1, i + 2)
   }
-
-  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
+  return this
 }
 
-function checked (length) {
-  // Note: cannot use `length < kMaxLength()` here because that fails when
-  // length is NaN (which is otherwise coerced to zero.)
-  if (length >= kMaxLength()) {
-    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
-                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
+Buffer.prototype.swap64 = function swap64 () {
+  var len = this.length
+  if (len % 8 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 64-bits')
   }
-  return length | 0
-}
-
-function SlowBuffer (length) {
-  if (+length != length) { // eslint-disable-line eqeqeq
-    length = 0
-  }
-  return Buffer.alloc(+length)
-}
-
-Buffer.isBuffer = function isBuffer (b) {
-  return !!(b != null && b._isBuffer)
-}
-
-Buffer.compare = function compare (a, b) {
-  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
-    throw new TypeError('Arguments must be Buffers')
-  }
-
-  if (a === b) return 0
-
-  var x = a.length
-  var y = b.length
-
-  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
-    if (a[i] !== b[i]) {
-      x = a[i]
-      y = b[i]
-      break
-    }
-  }
-
-  if (x < y) return -1
-  if (y < x) return 1
-  return 0
-}
-
-Buffer.isEncoding = function isEncoding (encoding) {
-  switch (String(encoding).toLowerCase()) {
-    case 'hex':
-    case 'utf8':
-    case 'utf-8':
-    case 'ascii':
-    case 'latin1':
-    case 'binary':
-    case 'base64':
-    case 'ucs2':
-    case 'ucs-2':
-    case 'utf16le':
-    case 'utf-16le':
-      return true
-    default:
-      return false
-  }
-}
-
-Buffer.concat = function concat (list, length) {
-  if (!isArray(list)) {
-    throw new TypeError('"list" argument must be an Array of Buffers')
-  }
-
-  if (list.length === 0) {
-    return Buffer.alloc(0)
-  }
-
-  var i
-  if (length === undefined) {
-    length = 0
-    for (i = 0; i < list.length; ++i) {
-      length += list[i].length
-    }
-  }
-
-  var buffer = Buffer.allocUnsafe(length)
-  var pos = 0
-  for (i = 0; i < list.length; ++i) {
-    var buf = list[i]
-    if (!Buffer.isBuffer(buf)) {
-      throw new TypeError('"list" argument must be an Array of Buffers')
-    }
-    buf.copy(buffer, pos)
-    pos += buf.length
-  }
-  return buffer
-}
-
-function byteLength (string, encoding) {
-  if (Buffer.isBuffer(string)) {
-    return string.length
-  }
-  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&
-      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {
-    return string.byteLength
-  }
-  if (typeof string !== 'string') {
-    string = '' + string
-  }
-
-  var len = string.length
-  if (len === 0) return 0
-
-  // Use a for loop to avoid recursion
-  var loweredCase = false
-  for (;;) {
-    switch (encoding) {
-      case 'ascii':
-      case 'latin1':
-      case 'binary':
-        return len
-      case 'utf8':
-      case 'utf-8':
-      case undefined:
-        return utf8ToBytes(string).length
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return len * 2
-      case 'hex':
-        return len >>> 1
-      case 'base64':
-        return base64ToBytes(string).length
-      default:
-        if (loweredCase) return utf8ToBytes(string).length // assume utf8
-        encoding = ('' + encoding).toLowerCase()
-        loweredCase = true
-    }
-  }
-}
-Buffer.byteLength = byteLength
-
-function slowToString (encoding, start, end) {
-  var loweredCase = false
-
-  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
-  // property of a typed array.
-
-  // This behaves neither like String nor Uint8Array in that we set start/end
-  // to their upper/lower bounds if the value passed is out of range.
-  // undefined is handled specially as per ECMA-262 6th Edition,
-  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
-  if (start === undefined || start < 0) {
-    start = 0
-  }
-  // Return early if start > this.length. Done here to prevent potential uint32
-  // coercion fail below.
-  if (start > this.length) {
-    return ''
-  }
-
-  if (end === undefined || end > this.length) {
-    end = this.length
-  }
-
-  if (end <= 0) {
-    return ''
-  }
-
-  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
-  end >>>= 0
-  start >>>= 0
-
-  if (end <= start) {
-    return ''
-  }
-
-  if (!encoding) encoding = 'utf8'
-
-  while (true) {
-    switch (encoding) {
-      case 'hex':
-        return hexSlice(this, start, end)
-
-      case 'utf8':
-      case 'utf-8':
-        return utf8Slice(this, start, end)
-
-      case 'ascii':
-        return asciiSlice(this, start, end)
-
-      case 'latin1':
-      case 'binary':
-        return latin1Slice(this, start, end)
-
-      case 'base64':
-        return base64Slice(this, start, end)
-
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return utf16leSlice(this, start, end)
-
-      default:
-        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
-        encoding = (encoding + '').toLowerCase()
-        loweredCase = true
-    }
-  }
-}
-
-// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect
-// Buffer instances.
-Buffer.prototype._isBuffer = true
-
-function swap (b, n, m) {
-  var i = b[n]
-  b[n] = b[m]
-  b[m] = i
-}
-
-Buffer.prototype.swap16 = function swap16 () {
-  var len = this.length
-  if (len % 2 !== 0) {
-    throw new RangeError('Buffer size must be a multiple of 16-bits')
-  }
-  for (var i = 0; i < len; i += 2) {
-    swap(this, i, i + 1)
-  }
-  return this
-}
-
-Buffer.prototype.swap32 = function swap32 () {
-  var len = this.length
-  if (len % 4 !== 0) {
-    throw new RangeError('Buffer size must be a multiple of 32-bits')
-  }
-  for (var i = 0; i < len; i += 4) {
-    swap(this, i, i + 3)
-    swap(this, i + 1, i + 2)
-  }
-  return this
-}
-
-Buffer.prototype.swap64 = function swap64 () {
-  var len = this.length
-  if (len % 8 !== 0) {
-    throw new RangeError('Buffer size must be a multiple of 64-bits')
-  }
-  for (var i = 0; i < len; i += 8) {
-    swap(this, i, i + 7)
-    swap(this, i + 1, i + 6)
-    swap(this, i + 2, i + 5)
-    swap(this, i + 3, i + 4)
-  }
-  return this
+  for (var i = 0; i < len; i += 8) {
+    swap(this, i, i + 7)
+    swap(this, i + 1, i + 6)
+    swap(this, i + 2, i + 5)
+    swap(this, i + 3, i + 4)
+  }
+  return this
 }
 
 Buffer.prototype.toString = function toString () {
@@ -2135,303 +1771,611 @@ function checkIEEE754 (buf, value, offset, ext, max, min) {
   if (offset < 0) throw new RangeError('Index out of range')
 }
 
-function writeFloat (buf, value, offset, littleEndian, noAssert) {
-  if (!noAssert) {
-    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
-  }
-  ieee754.write(buf, value, offset, littleEndian, 23, 4)
-  return offset + 4
+function writeFloat (buf, value, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 23, 4)
+  return offset + 4
+}
+
+Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, false, noAssert)
+}
+
+function writeDouble (buf, value, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 52, 8)
+  return offset + 8
+}
+
+Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, false, noAssert)
+}
+
+// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
+Buffer.prototype.copy = function copy (target, targetStart, start, end) {
+  if (!start) start = 0
+  if (!end && end !== 0) end = this.length
+  if (targetStart >= target.length) targetStart = target.length
+  if (!targetStart) targetStart = 0
+  if (end > 0 && end < start) end = start
+
+  // Copy 0 bytes; we're done
+  if (end === start) return 0
+  if (target.length === 0 || this.length === 0) return 0
+
+  // Fatal error conditions
+  if (targetStart < 0) {
+    throw new RangeError('targetStart out of bounds')
+  }
+  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
+  if (end < 0) throw new RangeError('sourceEnd out of bounds')
+
+  // Are we oob?
+  if (end > this.length) end = this.length
+  if (target.length - targetStart < end - start) {
+    end = target.length - targetStart + start
+  }
+
+  var len = end - start
+  var i
+
+  if (this === target && start < targetStart && targetStart < end) {
+    // descending copy from end
+    for (i = len - 1; i >= 0; --i) {
+      target[i + targetStart] = this[i + start]
+    }
+  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
+    // ascending copy from start
+    for (i = 0; i < len; ++i) {
+      target[i + targetStart] = this[i + start]
+    }
+  } else {
+    Uint8Array.prototype.set.call(
+      target,
+      this.subarray(start, start + len),
+      targetStart
+    )
+  }
+
+  return len
+}
+
+// Usage:
+//    buffer.fill(number[, offset[, end]])
+//    buffer.fill(buffer[, offset[, end]])
+//    buffer.fill(string[, offset[, end]][, encoding])
+Buffer.prototype.fill = function fill (val, start, end, encoding) {
+  // Handle string cases:
+  if (typeof val === 'string') {
+    if (typeof start === 'string') {
+      encoding = start
+      start = 0
+      end = this.length
+    } else if (typeof end === 'string') {
+      encoding = end
+      end = this.length
+    }
+    if (val.length === 1) {
+      var code = val.charCodeAt(0)
+      if (code < 256) {
+        val = code
+      }
+    }
+    if (encoding !== undefined && typeof encoding !== 'string') {
+      throw new TypeError('encoding must be a string')
+    }
+    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
+      throw new TypeError('Unknown encoding: ' + encoding)
+    }
+  } else if (typeof val === 'number') {
+    val = val & 255
+  }
+
+  // Invalid ranges are not set to a default, so can range check early.
+  if (start < 0 || this.length < start || this.length < end) {
+    throw new RangeError('Out of range index')
+  }
+
+  if (end <= start) {
+    return this
+  }
+
+  start = start >>> 0
+  end = end === undefined ? this.length : end >>> 0
+
+  if (!val) val = 0
+
+  var i
+  if (typeof val === 'number') {
+    for (i = start; i < end; ++i) {
+      this[i] = val
+    }
+  } else {
+    var bytes = Buffer.isBuffer(val)
+      ? val
+      : utf8ToBytes(new Buffer(val, encoding).toString())
+    var len = bytes.length
+    for (i = 0; i < end - start; ++i) {
+      this[i + start] = bytes[i % len]
+    }
+  }
+
+  return this
+}
+
+// HELPER FUNCTIONS
+// ================
+
+var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
+
+function base64clean (str) {
+  // Node strips out invalid characters like \n and \t from the string, base64-js does not
+  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
+  // Node converts strings with length < 2 to ''
+  if (str.length < 2) return ''
+  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
+  while (str.length % 4 !== 0) {
+    str = str + '='
+  }
+  return str
+}
+
+function stringtrim (str) {
+  if (str.trim) return str.trim()
+  return str.replace(/^\s+|\s+$/g, '')
+}
+
+function toHex (n) {
+  if (n < 16) return '0' + n.toString(16)
+  return n.toString(16)
+}
+
+function utf8ToBytes (string, units) {
+  units = units || Infinity
+  var codePoint
+  var length = string.length
+  var leadSurrogate = null
+  var bytes = []
+
+  for (var i = 0; i < length; ++i) {
+    codePoint = string.charCodeAt(i)
+
+    // is surrogate component
+    if (codePoint > 0xD7FF && codePoint < 0xE000) {
+      // last char was a lead
+      if (!leadSurrogate) {
+        // no lead yet
+        if (codePoint > 0xDBFF) {
+          // unexpected trail
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        } else if (i + 1 === length) {
+          // unpaired lead
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        }
+
+        // valid lead
+        leadSurrogate = codePoint
+
+        continue
+      }
+
+      // 2 leads in a row
+      if (codePoint < 0xDC00) {
+        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+        leadSurrogate = codePoint
+        continue
+      }
+
+      // valid surrogate pair
+      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
+    } else if (leadSurrogate) {
+      // valid bmp char, but last char was a lead
+      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+    }
+
+    leadSurrogate = null
+
+    // encode utf8
+    if (codePoint < 0x80) {
+      if ((units -= 1) < 0) break
+      bytes.push(codePoint)
+    } else if (codePoint < 0x800) {
+      if ((units -= 2) < 0) break
+      bytes.push(
+        codePoint >> 0x6 | 0xC0,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x10000) {
+      if ((units -= 3) < 0) break
+      bytes.push(
+        codePoint >> 0xC | 0xE0,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x110000) {
+      if ((units -= 4) < 0) break
+      bytes.push(
+        codePoint >> 0x12 | 0xF0,
+        codePoint >> 0xC & 0x3F | 0x80,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else {
+      throw new Error('Invalid code point')
+    }
+  }
+
+  return bytes
+}
+
+function asciiToBytes (str) {
+  var byteArray = []
+  for (var i = 0; i < str.length; ++i) {
+    // Node's code seems to be doing this and not & 0x7F..
+    byteArray.push(str.charCodeAt(i) & 0xFF)
+  }
+  return byteArray
+}
+
+function utf16leToBytes (str, units) {
+  var c, hi, lo
+  var byteArray = []
+  for (var i = 0; i < str.length; ++i) {
+    if ((units -= 2) < 0) break
+
+    c = str.charCodeAt(i)
+    hi = c >> 8
+    lo = c % 256
+    byteArray.push(lo)
+    byteArray.push(hi)
+  }
+
+  return byteArray
+}
+
+function base64ToBytes (str) {
+  return base64.toByteArray(base64clean(str))
+}
+
+function blitBuffer (src, dst, offset, length) {
+  for (var i = 0; i < length; ++i) {
+    if ((i + offset >= dst.length) || (i >= src.length)) break
+    dst[i + offset] = src[i]
+  }
+  return i
+}
+
+function isnan (val) {
+  return val !== val // eslint-disable-line no-self-compare
+}
+
+/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__("b25b")))
+
+/***/ }),
+
+/***/ "5e42":
+/***/ (function(module, __webpack_exports__, __webpack_require__) {
+
+"use strict";
+/* harmony import */ var _plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_a326889c_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("921e");
+/* harmony import */ var _plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_a326889c_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_a326889c_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__);
+/* unused harmony reexport * */
+ /* unused harmony default export */ var _unused_webpack_default_export = (_plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_a326889c_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default.a); 
+
+/***/ }),
+
+/***/ "5f9f":
+/***/ (function(module, exports) {
+
+var toString = {}.toString;
+
+module.exports = Array.isArray || function (arr) {
+  return toString.call(arr) == '[object Array]';
+};
+
+
+/***/ }),
+
+/***/ "88a2":
+/***/ (function(module, __webpack_exports__, __webpack_require__) {
+
+"use strict";
+/* WEBPACK VAR INJECTION */(function(Buffer) {/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "b", function() { return getPTZCmd; });
+/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() { return PTZ_TYPE; });
+/**
+ * Date:2020/11/9
+ * Desc:
+ */
+/**
+ * Date:2020/11/2
+ * Desc: ptz cmd 封装
+ * cmd[0] //首字节以05H开头
+ * cmd[1] //组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码
+ *        //  校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16
+ * cmd[2] //地址的低8位？？？什么地址，地址范围000h ~ FFFh(0~4095),其中000h为广播地址
+ * cmd[3] //指令码
+ * cmd[4] //数据1,水平控制速度、聚焦速度
+ * cmd[5] //数据2，垂直控制速度、光圈速度
+ * cmd[6] // 高4位为数据3=变倍控制速度，低4位为地址高4位
+ */
+
+const PTZ_TYPE = {
+    stop: 'stop',
+    right: 'right',
+    left: 'left',
+    up: 'up',
+    down: 'down',
+    leftUp: 'leftUp',
+    leftDown: 'leftDown',
+    rightUp: 'rightUp',
+    rightDown: 'rightDown',
+    zoomFar: 'zoomFar',
+    zoomNear: 'zoomNear',
+    apertureFar: 'apertureFar',
+    apertureNear: 'apertureNear',
+    focusFar: 'focusFar',
+    focusNear: 'focusNear',
+    setPos: 'setPos',
+    calPos: 'calPos',
+    delPos: 'delPos'
+};
+
+const PTZ_CMD_TYPE = {
+    stop: 0x00,
+
+    right: 0x01,
+    left: 0x02,
+    up: 0x08,
+    down: 0x04,
+
+    leftUp: 0x0A,
+    leftDown: 0x06,
+    rightUp: 0x09,
+    rightDown: 0x05,
+
+    zoomFar: 0x10, // 镜头 放大
+    zoomNear: 0x20,  // 镜头 缩小
+
+    apertureFar: 0x48, // 光圈 缩小
+    apertureNear: 0x44, // 光圈 放大
+
+    focusFar: 0x42, // 聚焦 近
+    focusNear: 0x41, // 聚焦 远
+
+    setPos: 0x81,
+    calPos: 0x82,
+    delPos: 0x83
+};
+
+const SPEED_ARRAY = [0x19, 0x32, 0x4b, 0x64, 0x7d, 0x96, 0xAF, 0xC8, 0xE1, 0xFA];
+const POSITION_ARRAY = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10];
+
+// 获取 direction 方向型
+/**
+ *
+ * @param options
+ *        type:
+ *        speed:default 5
+ *        index:
+ * @returns {string}
+ */
+function getPTZCmd(options) {
+    const {type, speed, index} = options;
+    const ptzSpeed = getPTZSpeed(speed);
+    let indexValue3, indexValue4, indexValue5, indexValue6;
+    indexValue3 = PTZ_CMD_TYPE[type];
+    switch (type) {
+        case PTZ_TYPE.up:
+        case PTZ_TYPE.down:
+        case PTZ_TYPE.apertureFar:
+        case PTZ_TYPE.apertureNear:
+            indexValue5 = ptzSpeed;
+            break;
+        case PTZ_TYPE.right:
+        case PTZ_TYPE.left:
+        case PTZ_TYPE.focusFar:
+        case PTZ_TYPE.focusNear:
+            indexValue4 = ptzSpeed;
+            break;
+        case PTZ_TYPE.leftUp:
+        case PTZ_TYPE.leftDown:
+        case PTZ_TYPE.rightUp:
+        case PTZ_TYPE.rightDown:
+            indexValue4 = ptzSpeed;
+            indexValue5 = ptzSpeed;
+            break;
+        case PTZ_TYPE.zoomFar:
+        case PTZ_TYPE.zoomNear:
+            indexValue6 = 0x10;
+            break;
+        case PTZ_TYPE.calPos:
+        case PTZ_TYPE.delPos:
+        case PTZ_TYPE.setPos:
+            indexValue5 = getPTZPositionIndex(index);
+            break;
+        default:
+            break;
+    }
+    return ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6);
+}
+
+function getPTZSpeed(speed) {
+    speed = speed || 5;
+    const speedIndex = speed - 1;
+    const ptzSpeed = SPEED_ARRAY[speedIndex] || SPEED_ARRAY[4];
+    return ptzSpeed;
 }
 
-Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
-  return writeFloat(this, value, offset, true, noAssert)
+function getPTZPositionIndex(index) {
+    return POSITION_ARRAY[index - 1];
 }
 
-Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
-  return writeFloat(this, value, offset, false, noAssert)
-}
+function ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6) {
+    //
+    let cmd = Buffer.alloc(8);
+    // 首字节以05H开头
+    cmd[0] = 0xA5;
+    // 组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码
+    cmd[1] = 0x0F;
+    // 校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16
+    cmd[2] = 0x01;
+    //
+    if (indexValue3) {
+        cmd[3] = indexValue3;
+    }
+    if (indexValue4) {
+        cmd[4] = indexValue4;
+    }
+    if (indexValue5) {
+        cmd[5] = indexValue5;
+    }
+    if (indexValue6) {
+        cmd[6] = indexValue6;
+    }
 
-function writeDouble (buf, value, offset, littleEndian, noAssert) {
-  if (!noAssert) {
-    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
-  }
-  ieee754.write(buf, value, offset, littleEndian, 52, 8)
-  return offset + 8
-}
+    cmd[7] = (cmd[0] + cmd[1] + cmd[2] + cmd[3] + cmd[4] + cmd[5] + cmd[6]) % 256;
 
-Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
-  return writeDouble(this, value, offset, true, noAssert)
+    return bytes2HexString(cmd);
 }
 
-Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
-  return writeDouble(this, value, offset, false, noAssert)
+function bytes2HexString(byte) {
+    let hexs = "";
+    for (let i = 0; i < byte.length; i++) {
+        let hex = (byte[i]).toString(16);
+        if (hex.length === 1) {
+            hex = '0' + hex;
+        }
+        hexs += hex.toUpperCase();
+    }
+    return hexs;
 }
 
-// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
-Buffer.prototype.copy = function copy (target, targetStart, start, end) {
-  if (!start) start = 0
-  if (!end && end !== 0) end = this.length
-  if (targetStart >= target.length) targetStart = target.length
-  if (!targetStart) targetStart = 0
-  if (end > 0 && end < start) end = start
 
-  // Copy 0 bytes; we're done
-  if (end === start) return 0
-  if (target.length === 0 || this.length === 0) return 0
 
-  // Fatal error conditions
-  if (targetStart < 0) {
-    throw new RangeError('targetStart out of bounds')
-  }
-  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
-  if (end < 0) throw new RangeError('sourceEnd out of bounds')
+/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__("32dd").Buffer))
 
-  // Are we oob?
-  if (end > this.length) end = this.length
-  if (target.length - targetStart < end - start) {
-    end = target.length - targetStart + start
-  }
+/***/ }),
 
-  var len = end - start
-  var i
+/***/ "921e":
+/***/ (function(module, exports, __webpack_require__) {
 
-  if (this === target && start < targetStart && targetStart < end) {
-    // descending copy from end
-    for (i = len - 1; i >= 0; --i) {
-      target[i + targetStart] = this[i + start]
-    }
-  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
-    // ascending copy from start
-    for (i = 0; i < len; ++i) {
-      target[i + targetStart] = this[i + start]
-    }
-  } else {
-    Uint8Array.prototype.set.call(
-      target,
-      this.subarray(start, start + len),
-      targetStart
-    )
-  }
+// extracted by mini-css-extract-plugin
 
-  return len
-}
+/***/ }),
 
-// Usage:
-//    buffer.fill(number[, offset[, end]])
-//    buffer.fill(buffer[, offset[, end]])
-//    buffer.fill(string[, offset[, end]][, encoding])
-Buffer.prototype.fill = function fill (val, start, end, encoding) {
-  // Handle string cases:
-  if (typeof val === 'string') {
-    if (typeof start === 'string') {
-      encoding = start
-      start = 0
-      end = this.length
-    } else if (typeof end === 'string') {
-      encoding = end
-      end = this.length
-    }
-    if (val.length === 1) {
-      var code = val.charCodeAt(0)
-      if (code < 256) {
-        val = code
-      }
-    }
-    if (encoding !== undefined && typeof encoding !== 'string') {
-      throw new TypeError('encoding must be a string')
-    }
-    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
-      throw new TypeError('Unknown encoding: ' + encoding)
-    }
-  } else if (typeof val === 'number') {
-    val = val & 255
-  }
+/***/ "99fc":
+/***/ (function(module, exports) {
 
-  // Invalid ranges are not set to a default, so can range check early.
-  if (start < 0 || this.length < start || this.length < end) {
-    throw new RangeError('Out of range index')
-  }
+exports.read = function (buffer, offset, isLE, mLen, nBytes) {
+  var e, m
+  var eLen = (nBytes * 8) - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var nBits = -7
+  var i = isLE ? (nBytes - 1) : 0
+  var d = isLE ? -1 : 1
+  var s = buffer[offset + i]
 
-  if (end <= start) {
-    return this
-  }
+  i += d
 
-  start = start >>> 0
-  end = end === undefined ? this.length : end >>> 0
+  e = s & ((1 << (-nBits)) - 1)
+  s >>= (-nBits)
+  nBits += eLen
+  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
 
-  if (!val) val = 0
+  m = e & ((1 << (-nBits)) - 1)
+  e >>= (-nBits)
+  nBits += mLen
+  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
 
-  var i
-  if (typeof val === 'number') {
-    for (i = start; i < end; ++i) {
-      this[i] = val
-    }
+  if (e === 0) {
+    e = 1 - eBias
+  } else if (e === eMax) {
+    return m ? NaN : ((s ? -1 : 1) * Infinity)
   } else {
-    var bytes = Buffer.isBuffer(val)
-      ? val
-      : utf8ToBytes(new Buffer(val, encoding).toString())
-    var len = bytes.length
-    for (i = 0; i < end - start; ++i) {
-      this[i + start] = bytes[i % len]
-    }
-  }
-
-  return this
-}
-
-// HELPER FUNCTIONS
-// ================
-
-var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
-
-function base64clean (str) {
-  // Node strips out invalid characters like \n and \t from the string, base64-js does not
-  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
-  // Node converts strings with length < 2 to ''
-  if (str.length < 2) return ''
-  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
-  while (str.length % 4 !== 0) {
-    str = str + '='
+    m = m + Math.pow(2, mLen)
+    e = e - eBias
   }
-  return str
-}
-
-function stringtrim (str) {
-  if (str.trim) return str.trim()
-  return str.replace(/^\s+|\s+$/g, '')
-}
-
-function toHex (n) {
-  if (n < 16) return '0' + n.toString(16)
-  return n.toString(16)
+  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
 }
 
-function utf8ToBytes (string, units) {
-  units = units || Infinity
-  var codePoint
-  var length = string.length
-  var leadSurrogate = null
-  var bytes = []
-
-  for (var i = 0; i < length; ++i) {
-    codePoint = string.charCodeAt(i)
-
-    // is surrogate component
-    if (codePoint > 0xD7FF && codePoint < 0xE000) {
-      // last char was a lead
-      if (!leadSurrogate) {
-        // no lead yet
-        if (codePoint > 0xDBFF) {
-          // unexpected trail
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        } else if (i + 1 === length) {
-          // unpaired lead
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        }
-
-        // valid lead
-        leadSurrogate = codePoint
-
-        continue
-      }
+exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
+  var e, m, c
+  var eLen = (nBytes * 8) - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
+  var i = isLE ? 0 : (nBytes - 1)
+  var d = isLE ? 1 : -1
+  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
 
-      // 2 leads in a row
-      if (codePoint < 0xDC00) {
-        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-        leadSurrogate = codePoint
-        continue
-      }
+  value = Math.abs(value)
 
-      // valid surrogate pair
-      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
-    } else if (leadSurrogate) {
-      // valid bmp char, but last char was a lead
-      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+  if (isNaN(value) || value === Infinity) {
+    m = isNaN(value) ? 1 : 0
+    e = eMax
+  } else {
+    e = Math.floor(Math.log(value) / Math.LN2)
+    if (value * (c = Math.pow(2, -e)) < 1) {
+      e--
+      c *= 2
     }
-
-    leadSurrogate = null
-
-    // encode utf8
-    if (codePoint < 0x80) {
-      if ((units -= 1) < 0) break
-      bytes.push(codePoint)
-    } else if (codePoint < 0x800) {
-      if ((units -= 2) < 0) break
-      bytes.push(
-        codePoint >> 0x6 | 0xC0,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x10000) {
-      if ((units -= 3) < 0) break
-      bytes.push(
-        codePoint >> 0xC | 0xE0,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x110000) {
-      if ((units -= 4) < 0) break
-      bytes.push(
-        codePoint >> 0x12 | 0xF0,
-        codePoint >> 0xC & 0x3F | 0x80,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
+    if (e + eBias >= 1) {
+      value += rt / c
     } else {
-      throw new Error('Invalid code point')
+      value += rt * Math.pow(2, 1 - eBias)
+    }
+    if (value * c >= 2) {
+      e++
+      c /= 2
     }
-  }
-
-  return bytes
-}
 
-function asciiToBytes (str) {
-  var byteArray = []
-  for (var i = 0; i < str.length; ++i) {
-    // Node's code seems to be doing this and not & 0x7F..
-    byteArray.push(str.charCodeAt(i) & 0xFF)
+    if (e + eBias >= eMax) {
+      m = 0
+      e = eMax
+    } else if (e + eBias >= 1) {
+      m = ((value * c) - 1) * Math.pow(2, mLen)
+      e = e + eBias
+    } else {
+      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
+      e = 0
+    }
   }
-  return byteArray
-}
 
-function utf16leToBytes (str, units) {
-  var c, hi, lo
-  var byteArray = []
-  for (var i = 0; i < str.length; ++i) {
-    if ((units -= 2) < 0) break
+  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
-    c = str.charCodeAt(i)
-    hi = c >> 8
-    lo = c % 256
-    byteArray.push(lo)
-    byteArray.push(hi)
-  }
+  e = (e << mLen) | m
+  eLen += mLen
+  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
 
-  return byteArray
+  buffer[offset + i - d] |= s * 128
 }
 
-function base64ToBytes (str) {
-  return base64.toByteArray(base64clean(str))
-}
 
-function blitBuffer (src, dst, offset, length) {
-  for (var i = 0; i < length; ++i) {
-    if ((i + offset >= dst.length) || (i >= src.length)) break
-    dst[i + offset] = src[i]
-  }
-  return i
-}
+/***/ }),
 
-function isnan (val) {
-  return val !== val // eslint-disable-line no-self-compare
-}
+/***/ "9e83":
+/***/ (function(module, exports, __webpack_require__) {
 
-/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__("c8ba")))
+// extracted by mini-css-extract-plugin
 
 /***/ }),
 
-/***/ "c8ba":
+/***/ "b25b":
 /***/ (function(module, exports) {
 
 var g;
@@ -2458,57 +2402,20 @@ module.exports = g;
 
 /***/ }),
 
-/***/ "d989":
-/***/ (function(module, exports, __webpack_require__) {
-
-// extracted by mini-css-extract-plugin
-
-/***/ }),
-
-/***/ "dc29":
-/***/ (function(module, exports, __webpack_require__) {
-
-// extracted by mini-css-extract-plugin
-
-/***/ }),
-
-/***/ "e3db":
-/***/ (function(module, exports) {
-
-var toString = {}.toString;
-
-module.exports = Array.isArray || function (arr) {
-  return toString.call(arr) == '[object Array]';
-};
-
-
-/***/ }),
-
-/***/ "fa0b":
-/***/ (function(module, __webpack_exports__, __webpack_require__) {
-
-"use strict";
-/* harmony import */ var _node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_379ce7fe_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("2d55");
-/* harmony import */ var _node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_379ce7fe_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_379ce7fe_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__);
-/* unused harmony reexport * */
-
-
-/***/ }),
-
-/***/ "fb15":
+/***/ "deee":
 /***/ (function(module, __webpack_exports__, __webpack_require__) {
 
 "use strict";
 // ESM COMPAT FLAG
 __webpack_require__.r(__webpack_exports__);
 
-// CONCATENATED MODULE: ./node_modules/@vue/cli-service/lib/commands/build/setPublicPath.js
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/@vue/cli-service/lib/commands/build/setPublicPath.js
 // This file is imported into lib/wc client bundles.
 
 if (typeof window !== 'undefined') {
   var currentScript = window.document.currentScript
   if (true) {
-    var getCurrentScript = __webpack_require__("8875")
+    var getCurrentScript = __webpack_require__("f3a8")
     currentScript = getCurrentScript()
 
     // for backward compatibility, because previously we directly included the polyfill
@@ -2526,29 +2433,29 @@ if (typeof window !== 'undefined') {
 // Indicate to webpack that this file can be concatenated
 /* harmony default export */ var setPublicPath = (null);
 
-// CONCATENATED MODULE: ./node_modules/cache-loader/dist/cjs.js?{"cacheDirectory":"node_modules/.cache/vue-loader","cacheIdentifier":"a0faeafc-vue-loader-template"}!./node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/App.vue?vue&type=template&id=77f8f0e9&scoped=true&
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js?{"cacheDirectory":"node_modules/.cache/vue-loader","cacheIdentifier":"2507526a-vue-loader-template"}!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib??vue-loader-options!./src/App.vue?vue&type=template&id=7bad0327&scoped=true&
 var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',[(_vm.$parent.titleTabActive === 0)?_c('div',{staticClass:"tabpanel"},[_c('mu-data-table',{attrs:{"data":_vm.Devices,"columns":_vm.columns},scopedSlots:_vm._u([{key:"expand",fn:function(prop){return [_c('mu-data-table',{attrs:{"data":prop.row.Channels,"columns":_vm.columns2},scopedSlots:_vm._u([{key:"default",fn:function(ref){
 var item = ref.row;
 var $index = ref.$index;
-return [_c('td',[_vm._v(_vm._s(item.DeviceID))]),_c('td',[_vm._v(_vm._s(item.Name))]),_c('td',[_vm._v(_vm._s(item.Manufacturer))]),_c('td',[_vm._v(_vm._s(item.Address))]),_c('td',[_vm._v(_vm._s(item.Status))]),_c('td',[(item.Connected)?_c('mu-button',{attrs:{"flat":""},on:{"click":function($event){return _vm.ptz(prop.row.ID, $index,item)}}},[_vm._v("云台 ")]):_vm._e(),(item.Connected)?_c('mu-button',{attrs:{"flat":""},on:{"click":function($event){return _vm.bye(prop.row.ID, $index)}}},[_vm._v("断开")]):_c('mu-button',{attrs:{"flat":""},on:{"click":function($event){return _vm.invite(prop.row.ID, $index,item)}}},[_vm._v("连接 ")])],1)]}}],null,true)})]}},{key:"default",fn:function(ref){
+return [_c('td',[_vm._v(_vm._s(item.DeviceID))]),_c('td',[_vm._v(_vm._s(item.Name))]),_c('td',[_vm._v(_vm._s(item.Manufacturer))]),_c('td',[_vm._v(_vm._s(item.Address))]),_c('td',[_vm._v(_vm._s(item.Status))]),_c('td',[(item.Connected)?_c('mu-button',{attrs:{"flat":""},on:{"click":function($event){return _vm.ptz(prop.row.ID, $index, item)}}},[_vm._v("云台 ")]):_vm._e(),(item.Connected)?_c('mu-button',{attrs:{"flat":""},on:{"click":function($event){return _vm.bye(prop.row.ID, $index)}}},[_vm._v("断开")]):_c('mu-button',{attrs:{"flat":""},on:{"click":function($event){return _vm.invite(prop.row.ID, $index, item)}}},[_vm._v("连接 ")])],1)]}}],null,true)})]}},{key:"default",fn:function(ref){
 var item = ref.row;
-return [_c('td',[_vm._v(_vm._s(item.ID))]),_c('td',[_vm._v(_vm._s(item.Channels ? item.Channels.length : 0))]),_c('td',[_c('StartTime',{attrs:{"value":item.RegisterTime}})],1),_c('td',[_c('StartTime',{attrs:{"value":item.UpdateTime}})],1),_c('td',[_vm._v(_vm._s(item.Status))])]}}],null,false,2342048966)})],1):_vm._e(),(_vm.$parent.titleTabActive === 1)?_c('div',{staticClass:"tabpanel"},[_c('div',{staticClass:"search"},[_c('i-select',{attrs:{"multiple":""},model:{value:(_vm.channelSelectedList),callback:function ($$v) {_vm.channelSelectedList=$$v},expression:"channelSelectedList"}},_vm._l((_vm.channelList),function(channel,index){return _c('Option',{key:index,attrs:{"value":channel,"label":channel.DeviceID + '(' + channel.Name + ')'}})}),1)],1),_c('div',{staticClass:"flex-box"},[_vm._l((_vm.channelSelectedList),function(channel,index){return [(channel.ID)?_c('div',{key:index,staticClass:"flex-item"},[_c('webrtc-player2',{attrs:{"stream-path":'gb28181/'+channel.ID}})],1):_vm._e()]})],2)]):_vm._e(),_c('webrtc-player',{ref:"player",attrs:{"PublicIP":_vm.PublicIP},on:{"ptz":_vm.sendPtz},model:{value:(_vm.previewStreamPath),callback:function ($$v) {_vm.previewStreamPath=$$v},expression:"previewStreamPath"}})],1)}
+return [_c('td',[_vm._v(_vm._s(item.ID))]),_c('td',[_vm._v(_vm._s(item.Addr))]),_c('td',[_vm._v(_vm._s(item.Channels ? item.Channels.length : 0))]),_c('td',[_c('StartTime',{attrs:{"value":item.RegisterTime}})],1),_c('td',[_c('StartTime',{attrs:{"value":item.UpdateTime}})],1),_c('td',[_vm._v(_vm._s(item.Status))])]}}],null,false,2809573184)})],1):_vm._e(),(_vm.$parent.titleTabActive === 1)?_c('div',{staticClass:"tabpanel"},[_c('div',{staticClass:"search"},[_c('i-select',{attrs:{"multiple":""},model:{value:(_vm.channelSelectedList),callback:function ($$v) {_vm.channelSelectedList=$$v},expression:"channelSelectedList"}},_vm._l((_vm.channelList),function(channel,index){return _c('Option',{key:index,attrs:{"value":channel,"label":channel.DeviceID + '(' + channel.Name + ')'}})}),1)],1),_c('div',{staticClass:"flex-box"},[_vm._l((_vm.channelSelectedList),function(channel,index){return [(channel.ID)?_c('div',{key:index,staticClass:"flex-item"},[_c('webrtc-player2',{attrs:{"stream-path":'gb28181/' + channel.ID}})],1):_vm._e()]})],2)]):_vm._e(),_c('webrtc-player',{ref:"player",attrs:{"PublicIP":_vm.PublicIP},on:{"ptz":_vm.sendPtz},model:{value:(_vm.previewStreamPath),callback:function ($$v) {_vm.previewStreamPath=$$v},expression:"previewStreamPath"}})],1)}
 var staticRenderFns = []
 
 
-// CONCATENATED MODULE: ./src/App.vue?vue&type=template&id=77f8f0e9&scoped=true&
+// CONCATENATED MODULE: ./src/App.vue?vue&type=template&id=7bad0327&scoped=true&
 
-// CONCATENATED MODULE: ./node_modules/cache-loader/dist/cjs.js?{"cacheDirectory":"node_modules/.cache/vue-loader","cacheIdentifier":"a0faeafc-vue-loader-template"}!./node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/components/Player.vue?vue&type=template&id=76558468&scoped=true&
-var Playervue_type_template_id_76558468_scoped_true_render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('Modal',_vm._g(_vm._b({attrs:{"draggable":"","width":"750","title":_vm.streamPath},on:{"on-ok":_vm.onClosePreview,"on-cancel":_vm.onClosePreview}},'Modal',_vm.$attrs,false),_vm.$listeners),[_c('div',{staticClass:"container"},[_c('video',{ref:"webrtc",attrs:{"width":"488","height":"275","autoplay":"","muted":"","controls":""},domProps:{"srcObject":_vm.stream,"muted":true}}),_c('div',{staticClass:"control"},[_vm._l((8),function(n){return _c('svg',{class:'arrow'+n,attrs:{"viewBox":"0 0 1024 1024","version":"1.1","xmlns":"http://www.w3.org/2000/svg","xmlns:xlink":"http://www.w3.org/1999/xlink","width":"64","height":"64"},on:{"click":function($event){return _vm.ptzCmdDirection(n)}}},[_c('defs'),_c('path',{attrs:{"d":"M682.666667 955.733333H341.333333a17.066667 17.066667 0 0 1-17.066666-17.066666V529.066667H85.333333a17.066667 17.066667 0 0 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19.73583961 19.77539086 29.61364722 43.57012915 29.61364722 71.47814965v101.14617896c0 9.26971435-3.27777099 17.30346656-9.88769508 23.78979493-6.56542945 6.69396997-14.52502465 9.88769508-23.82934617 9.88769506-9.29937744 0-17.26391602-3.19372583-23.82440139-9.88769506-6.61486816-6.48632836-9.88769508-14.52008057-9.88769579-23.78979493V242.35266137c0-9.26971435-3.28765845-17.19964576-9.90252661-23.78979492-6.57037354-6.59509253-14.52008057-9.88769508-23.83428955-9.88769579h-101.10168433c-9.31420898 0-17.2688601-3.29754663-23.82934618-9.88769507-6.60992408-6.59509253-9.89758325-14.52502465-9.89758254-23.79473902 0-9.37353516 3.28765845-17.30346656 9.89758254-23.89361571 6.56048608-6.59014916 14.51513648-9.88769508 23.82934618-9.88769508l0.04943799 0.09887672z"}})]),_c('svg',{attrs:{"viewBox":"0 0 1024 1024","version":"1.1","xmlns":"http://www.w3.org/2000/svg"},on:{"click":function($event){return _vm.ptzCmd(_vm.ptzType.focusNear)}}},[_c('path',{attrs:{"d":"M512 170.666667A341.333333 341.333333 0 1 1 170.666667 512 341.333333 341.333333 0 0 1 512 170.666667m0-42.666667a384 384 0 1 0 384 384A384 384 0 0 0 512 128z"}}),_c('path',{attrs:{"fill":"#333333","d":"M298.666667 533.333333H170.666667a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM853.333333 533.333333h-128a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM512 320a21.333333 21.333333 0 0 1-21.333333-21.333333V170.666667a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333333zM512 874.666667a21.333333 21.333333 0 0 1-21.333333-21.333334v-128a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333334z"}})])]),_c('div',{staticClass:"control5"},[_c('i-select',{staticStyle:{"width":"100px"},model:{value:(_vm.ptzPositionIndex),callback:function ($$v) {_vm.ptzPositionIndex=$$v},expression:"ptzPositionIndex"}},_vm._l((10),function(n){return _c('Option',{key:n,attrs:{"value":n}},[_vm._v("预置点"+_vm._s(n))])}),1),_c('i-button',{attrs:{"type":"primary"},on:{"click":function($event){return _vm.ptzCmd(_vm.ptzType.setPos)}}},[_vm._v("设置")]),_c('i-button',{attrs:{"type":"success"},on:{"click":function($event){return _vm.ptzCmd(_vm.ptzType.calPos)}}},[_vm._v("调用")]),_c('i-button',{attrs:{"type":"error"},on:{"click":function($event){return _vm.ptzCmd(_vm.ptzType.delPos)}}},[_vm._v("删除")]),_vm._v(" 速度： "),_c('InputNumber',{attrs:{"max":10,"min":1},model:{value:(_vm.ptzSpeed),callback:function ($$v) {_vm.ptzSpeed=$$v},expression:"ptzSpeed"}})],1)]),_c('div',{attrs:{"slot":"footer"},slot:"footer"},[(_vm.remoteSDP)?_c('mu-badge',[_c('a',{attrs:{"slot":"content","href":_vm.remoteSDPURL,"download":"remoteSDP.txt"},slot:"content"},[_vm._v("remoteSDP")])]):_vm._e(),(_vm.localSDP)?_c('mu-badge',[_c('a',{attrs:{"slot":"content","href":_vm.localSDPURL,"download":"localSDP.txt"},slot:"content"},[_vm._v("localSDP")])]):_vm._e()],1)])}
+var Playervue_type_template_id_a6774e8e_scoped_true_staticRenderFns = []
 
 
-// CONCATENATED MODULE: ./src/components/Player.vue?vue&type=template&id=76558468&scoped=true&
+// CONCATENATED MODULE: ./src/components/Player.vue?vue&type=template&id=a6774e8e&scoped=true&
 
 // EXTERNAL MODULE: ./src/utils/ptz-cmd.js
 var ptz_cmd = __webpack_require__("88a2");
 
-// CONCATENATED MODULE: ./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/components/Player.vue?vue&type=script&lang=js&
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib??vue-loader-options!./src/components/Player.vue?vue&type=script&lang=js&
 //
 //
 //
@@ -2684,10 +2591,10 @@ var ptz_cmd = __webpack_require__("88a2");
 
 // CONCATENATED MODULE: ./src/components/Player.vue?vue&type=script&lang=js&
  /* harmony default export */ var components_Playervue_type_script_lang_js_ = (Playervue_type_script_lang_js_); 
-// EXTERNAL MODULE: ./src/components/Player.vue?vue&type=style&index=0&id=76558468&scoped=true&lang=css&
-var Playervue_type_style_index_0_id_76558468_scoped_true_lang_css_ = __webpack_require__("040c");
+// EXTERNAL MODULE: ./src/components/Player.vue?vue&type=style&index=0&id=a6774e8e&scoped=true&lang=css&
+var Playervue_type_style_index_0_id_a6774e8e_scoped_true_lang_css_ = __webpack_require__("2d15");
 
-// CONCATENATED MODULE: ./node_modules/vue-loader/lib/runtime/componentNormalizer.js
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib/runtime/componentNormalizer.js
 /* globals __VUE_SSR_CONTEXT__ */
 
 // IMPORTANT: Do NOT use ES2015 features in this file (except for modules).
@@ -2798,24 +2705,24 @@ function normalizeComponent (
 
 var component = normalizeComponent(
   components_Playervue_type_script_lang_js_,
-  Playervue_type_template_id_76558468_scoped_true_render,
-  Playervue_type_template_id_76558468_scoped_true_staticRenderFns,
+  Playervue_type_template_id_a6774e8e_scoped_true_render,
+  Playervue_type_template_id_a6774e8e_scoped_true_staticRenderFns,
   false,
   null,
-  "76558468",
+  "a6774e8e",
   null
   
 )
 
 /* harmony default export */ var Player = (component.exports);
-// CONCATENATED MODULE: ./node_modules/cache-loader/dist/cjs.js?{"cacheDirectory":"node_modules/.cache/vue-loader","cacheIdentifier":"a0faeafc-vue-loader-template"}!./node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/components/Player2.vue?vue&type=template&id=379ce7fe&scoped=true&
-var Player2vue_type_template_id_379ce7fe_scoped_true_render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',{staticClass:"player-wrap"},[(_vm.rtcStream)?[_c('video',{attrs:{"autoplay":"","muted":"","controls":""},domProps:{"srcObject":_vm.rtcStream,"muted":true}})]:_vm._e()],2)}
-var Player2vue_type_template_id_379ce7fe_scoped_true_staticRenderFns = []
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js?{"cacheDirectory":"node_modules/.cache/vue-loader","cacheIdentifier":"2507526a-vue-loader-template"}!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib??vue-loader-options!./src/components/Player2.vue?vue&type=template&id=a326889c&scoped=true&
+var Player2vue_type_template_id_a326889c_scoped_true_render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',{staticClass:"player-wrap"},[(_vm.rtcStream)?[_c('video',{attrs:{"autoplay":"","muted":"","controls":""},domProps:{"srcObject":_vm.rtcStream,"muted":true}})]:_vm._e()],2)}
+var Player2vue_type_template_id_a326889c_scoped_true_staticRenderFns = []
 
 
-// CONCATENATED MODULE: ./src/components/Player2.vue?vue&type=template&id=379ce7fe&scoped=true&
+// CONCATENATED MODULE: ./src/components/Player2.vue?vue&type=template&id=a326889c&scoped=true&
 
-// CONCATENATED MODULE: ./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/components/Player2.vue?vue&type=script&lang=js&
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib??vue-loader-options!./src/components/Player2.vue?vue&type=script&lang=js&
 //
 //
 //
@@ -2914,8 +2821,8 @@ var Player2vue_type_template_id_379ce7fe_scoped_true_staticRenderFns = []
 
 // CONCATENATED MODULE: ./src/components/Player2.vue?vue&type=script&lang=js&
  /* harmony default export */ var components_Player2vue_type_script_lang_js_ = (Player2vue_type_script_lang_js_); 
-// EXTERNAL MODULE: ./src/components/Player2.vue?vue&type=style&index=0&id=379ce7fe&scoped=true&lang=css&
-var Player2vue_type_style_index_0_id_379ce7fe_scoped_true_lang_css_ = __webpack_require__("fa0b");
+// EXTERNAL MODULE: ./src/components/Player2.vue?vue&type=style&index=0&id=a326889c&scoped=true&lang=css&
+var Player2vue_type_style_index_0_id_a326889c_scoped_true_lang_css_ = __webpack_require__("5e42");
 
 // CONCATENATED MODULE: ./src/components/Player2.vue
 
@@ -2928,17 +2835,41 @@ var Player2vue_type_style_index_0_id_379ce7fe_scoped_true_lang_css_ = __webpack_
 
 var Player2_component = normalizeComponent(
   components_Player2vue_type_script_lang_js_,
-  Player2vue_type_template_id_379ce7fe_scoped_true_render,
-  Player2vue_type_template_id_379ce7fe_scoped_true_staticRenderFns,
+  Player2vue_type_template_id_a326889c_scoped_true_render,
+  Player2vue_type_template_id_a326889c_scoped_true_staticRenderFns,
   false,
   null,
-  "379ce7fe",
+  "a326889c",
   null
   
 )
 
 /* harmony default export */ var Player2 = (Player2_component.exports);
-// CONCATENATED MODULE: ./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/App.vue?vue&type=script&lang=js&
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib??vue-loader-options!./src/App.vue?vue&type=script&lang=js&
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
 //
 //
 //
@@ -3005,32 +2936,38 @@ var Player2_component = normalizeComponent(
 /* harmony default export */ var Appvue_type_script_lang_js_ = ({
     components: {
         WebrtcPlayer: Player,
-        WebrtcPlayer2: Player2
+        WebrtcPlayer2: Player2,
     },
     props: {
-        ListenAddr: String
+        ListenAddr: String,
     },
     computed: {
         PublicIP() {
-            return this.ListenAddr.split(":")[0]
-        }
+            return this.ListenAddr.split(":")[0];
+        },
     },
     data() {
         return {
-            Devices: [], previewStreamPath: false,
+            Devices: [],
+            previewStreamPath: false,
             channelList: [],
-            channelSelectedList:[],
+            channelSelectedList: [],
             context: {
                 id: null,
                 channel: 0,
-                item: null
+                item: null,
             },
             columns: Object.freeze(
-                ["设备号", "通道数", "注册时间", "更新时间", "状态"].map(
-                    (title) => ({
-                        title,
-                    })
-                )
+                [
+                    "设备号",
+                    "地址",
+                    "通道数",
+                    "注册时间",
+                    "更新时间",
+                    "状态",
+                ].map((title) => ({
+                    title,
+                }))
             ),
             columns2: Object.freeze([
                 "通道编号",
@@ -3039,7 +2976,7 @@ var Player2_component = normalizeComponent(
                 "地址",
                 "状态",
                 "操作",
-            ]).map((title) => ({title})),
+            ]).map((title) => ({ title })),
         };
     },
     created() {
@@ -3055,14 +2992,14 @@ var Player2_component = normalizeComponent(
                 if (!evt.data) return;
                 this.Devices = JSON.parse(evt.data) || [];
                 this.Devices.sort((a, b) => (a.ID > b.ID ? 1 : -1));
-                let channelList =[]
-                this.Devices.forEach((device)=>{
-                  const channels = device.Channels || [];
-                  if(channels.length > 0){
-                      channelList = channelList.concat(channels);
-                  }
+                let channelList = [];
+                this.Devices.forEach((device) => {
+                    const channels = device.Channels || [];
+                    if (channels.length > 0) {
+                        channelList = channelList.concat(channels);
+                    }
                 });
-                if(channelList.length > 0){
+                if (channelList.length > 0) {
                     this.channelList = channelList;
                 }
             };
@@ -3070,48 +3007,57 @@ var Player2_component = normalizeComponent(
         },
         ptz(id, channel, item) {
             this.context = {
-                id, channel, item
+                id,
+                channel,
+                item,
             };
-            this.previewStreamPath = true
-            this.$nextTick(() => this.$refs.player.play("gb28181/" + item.DeviceID));
+            this.previewStreamPath = true;
+            this.$nextTick(() =>
+                this.$refs.player.play("gb28181/" + item.DeviceID)
+            );
         },
         sendPtz(options) {
             const ptzCmd = Object(ptz_cmd["b" /* getPTZCmd */])(options);
-            const ptzCmdStop = Object(ptz_cmd["b" /* getPTZCmd */])({type: ptz_cmd["a" /* PTZ_TYPE */].stop});
-            this.ajax.get("/gb28181/control", {
-                id: this.context.id,
-                channel: this.context.channel,
-                ptzcmd: ptzCmd,
-            }).then(x => {
-                if (options.type === ptz_cmd["a" /* PTZ_TYPE */].stop || options.cycle === true) {
-                    return;
-                }
-                setTimeout(() => {
-                    this.ajax.get("/gb28181/control", {
-                        id: this.context.id,
-                        channel: this.context.channel,
-                        ptzcmd: ptzCmdStop,
-                    });
-                }, 500)
-            });
+            const ptzCmdStop = Object(ptz_cmd["b" /* getPTZCmd */])({ type: ptz_cmd["a" /* PTZ_TYPE */].stop });
+            this.ajax
+                .get("/gb28181/control", {
+                    id: this.context.id,
+                    channel: this.context.channel,
+                    ptzcmd: ptzCmd,
+                })
+                .then((x) => {
+                    if (
+                        options.type === ptz_cmd["a" /* PTZ_TYPE */].stop ||
+                        options.cycle === true
+                    ) {
+                        return;
+                    }
+                    setTimeout(() => {
+                        this.ajax.get("/gb28181/control", {
+                            id: this.context.id,
+                            channel: this.context.channel,
+                            ptzcmd: ptzCmdStop,
+                        });
+                    }, 500);
+                });
         },
         invite(id, channel, item) {
-            this.ajax.get("/gb28181/invite", {id, channel}).then(x => {
-                item.Connected = true
+            this.ajax.get("/gb28181/invite", { id, channel }).then((x) => {
+                item.Connected = true;
             });
         },
         bye(id, channel, item) {
-            this.ajax.get("/gb28181/bye", {id, channel}).then(x => {
-                item.Connected = false
+            this.ajax.get("/gb28181/bye", { id, channel }).then((x) => {
+                item.Connected = false;
             });
-        }
+        },
     },
 });
 
 // CONCATENATED MODULE: ./src/App.vue?vue&type=script&lang=js&
  /* harmony default export */ var src_Appvue_type_script_lang_js_ = (Appvue_type_script_lang_js_); 
-// EXTERNAL MODULE: ./src/App.vue?vue&type=style&index=0&id=77f8f0e9&scoped=true&lang=css&
-var Appvue_type_style_index_0_id_77f8f0e9_scoped_true_lang_css_ = __webpack_require__("4296");
+// EXTERNAL MODULE: ./src/App.vue?vue&type=style&index=0&id=7bad0327&scoped=true&lang=css&
+var Appvue_type_style_index_0_id_7bad0327_scoped_true_lang_css_ = __webpack_require__("0cd2");
 
 // CONCATENATED MODULE: ./src/App.vue
 
@@ -3128,19 +3074,104 @@ var App_component = normalizeComponent(
   staticRenderFns,
   false,
   null,
-  "77f8f0e9",
+  "7bad0327",
   null
   
 )
 
 /* harmony default export */ var App = (App_component.exports);
-// CONCATENATED MODULE: ./node_modules/@vue/cli-service/lib/commands/build/entry-lib.js
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/@vue/cli-service/lib/commands/build/entry-lib.js
 
 
 /* harmony default export */ var entry_lib = __webpack_exports__["default"] = (App);
 
 
 
+/***/ }),
+
+/***/ "df72":
+/***/ (function(module, exports, __webpack_require__) {
+
+// extracted by mini-css-extract-plugin
+
+/***/ }),
+
+/***/ "f3a8":
+/***/ (function(module, exports, __webpack_require__) {
+
+var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_DEFINE_RESULT__;// addapted from the document.currentScript polyfill by Adam Miller
+// MIT license
+// source: https://github.com/amiller-gh/currentScript-polyfill
+
+// added support for Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=1620505
+
+(function (root, factory) {
+  if (true) {
+    !(__WEBPACK_AMD_DEFINE_ARRAY__ = [], __WEBPACK_AMD_DEFINE_FACTORY__ = (factory),
+				__WEBPACK_AMD_DEFINE_RESULT__ = (typeof __WEBPACK_AMD_DEFINE_FACTORY__ === 'function' ?
+				(__WEBPACK_AMD_DEFINE_FACTORY__.apply(exports, __WEBPACK_AMD_DEFINE_ARRAY__)) : __WEBPACK_AMD_DEFINE_FACTORY__),
+				__WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
+  } else {}
+}(typeof self !== 'undefined' ? self : this, function () {
+  function getCurrentScript () {
+    if (document.currentScript) {
+      return document.currentScript
+    }
+  
+    // IE 8-10 support script readyState
+    // IE 11+ & Firefox support stack trace
+    try {
+      throw new Error();
+    }
+    catch (err) {
+      // Find the second match for the "at" string to get file src url from stack.
+      var ieStackRegExp = /.*at [^(]*\((.*):(.+):(.+)\)$/ig,
+        ffStackRegExp = /@([^@]*):(\d+):(\d+)\s*$/ig,
+        stackDetails = ieStackRegExp.exec(err.stack) || ffStackRegExp.exec(err.stack),
+        scriptLocation = (stackDetails && stackDetails[1]) || false,
+        line = (stackDetails && stackDetails[2]) || false,
+        currentLocation = document.location.href.replace(document.location.hash, ''),
+        pageSource,
+        inlineScriptSourceRegExp,
+        inlineScriptSource,
+        scripts = document.getElementsByTagName('script'); // Live NodeList collection
+  
+      if (scriptLocation === currentLocation) {
+        pageSource = document.documentElement.outerHTML;
+        inlineScriptSourceRegExp = new RegExp('(?:[^\\n]+?\\n){0,' + (line - 2) + '}[^<]*<script>([\\d\\D]*?)<\\/script>[\\d\\D]*', 'i');
+        inlineScriptSource = pageSource.replace(inlineScriptSourceRegExp, '$1').trim();
+      }
+  
+      for (var i = 0; i < scripts.length; i++) {
+        // If ready state is interactive, return the script tag
+        if (scripts[i].readyState === 'interactive') {
+          return scripts[i];
+        }
+  
+        // If src matches, return the script tag
+        if (scripts[i].src === scriptLocation) {
+          return scripts[i];
+        }
+  
+        // If inline source matches, return the script tag
+        if (
+          scriptLocation === currentLocation &&
+          scripts[i].innerHTML &&
+          scripts[i].innerHTML.trim() === inlineScriptSource
+        ) {
+          return scripts[i];
+        }
+      }
+  
+      // If no match, return null
+      return null;
+    }
+  };
+
+  return getCurrentScript
+}));
+
+
 /***/ })
 
 /******/ })["default"];
diff --git a/ui/dist/plugin-gb28181.common.js.map b/ui/dist/plugin-gb28181.common.js.map
index e681025..67dcdce 100644
--- a/ui/dist/plugin-gb28181.common.js.map
+++ b/ui/dist/plugin-gb28181.common.js.map
@@ -1 +1 @@
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Length must be a multiple of 4')\n  }\n\n  // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n  var validLen = b64.indexOf('=')\n  if (validLen === -1) validLen = len\n\n  var placeHoldersLen = validLen === len\n    ? 0\n    : 4 - (validLen % 4)\n\n  return [validLen, placeHoldersLen]\n}\n\n// base64 is 4/3 + up to two characters of the original data\nfunction byteLength (b64) {\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction _byteLength (b64, validLen, placeHoldersLen) {\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction toByteArray (b64) {\n  var tmp\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))\n\n  var curByte = 0\n\n  // if there are placeholders, only get up to the last complete 4 chars\n  var len = placeHoldersLen > 0\n    ? validLen - 4\n    : validLen\n\n  var i\n  for (i = 0; i < len; i += 4) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 18) |\n      (revLookup[b64.charCodeAt(i + 1)] << 12) |\n      (revLookup[b64.charCodeAt(i + 2)] << 6) |\n      revLookup[b64.charCodeAt(i + 3)]\n    arr[curByte++] = (tmp >> 16) & 0xFF\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 2) |\n      (revLookup[b64.charCodeAt(i + 1)] >> 4)\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 10) |\n      (revLookup[b64.charCodeAt(i + 1)] << 4) |\n      (revLookup[b64.charCodeAt(i + 2)] >> 2)\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  return arr\n}\n\nfunction tripletToBase64 (num) {\n  return lookup[num >> 18 & 0x3F] +\n    lookup[num >> 12 & 0x3F] +\n    lookup[num >> 6 & 0x3F] +\n    lookup[num & 0x3F]\n}\n\nfunction encodeChunk (uint8, start, end) {\n  var tmp\n  var output = []\n  for (var i = start; i < end; i += 3) {\n    tmp =\n      ((uint8[i] << 16) & 0xFF0000) +\n      ((uint8[i + 1] << 8) & 0xFF00) +\n      (uint8[i + 2] & 0xFF)\n    output.push(tripletToBase64(tmp))\n  }\n  return output.join('')\n}\n\nfunction fromByteArray (uint8) {\n  var tmp\n  var len = uint8.length\n  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes\n  var parts = []\n  var maxChunkLength = 16383 // must be multiple of 3\n\n  // go through the array every three bytes, we'll deal with trailing stuff later\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(\n      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)\n    ))\n  }\n\n  // pad the end with zeros, but make sure to not forget the extra bytes\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 2] +\n      lookup[(tmp << 4) & 0x3F] +\n      '=='\n    )\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 10] +\n      lookup[(tmp >> 4) & 0x3F] +\n      lookup[(tmp << 2) & 0x3F] +\n      '='\n    )\n  }\n\n  return parts.join('')\n}\n","// extracted by mini-css-extract-plugin","export * from \"-!../node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../node_modules/vue-loader/lib/loaders/stylePostLoader.js!../node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../node_modules/cache-loader/dist/cjs.js??ref--0-0!../node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=style&index=0&id=77f8f0e9&scoped=true&lang=css&\"","// addapted from the document.currentScript polyfill by Adam Miller\n// MIT license\n// source: https://github.com/amiller-gh/currentScript-polyfill\n\n// added support for Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=1620505\n\n(function (root, factory) {\n  if (typeof define === 'function' && define.amd) {\n    define([], factory);\n  } else if (typeof module === 'object' && module.exports) {\n    module.exports = factory();\n  } else {\n    root.getCurrentScript = factory();\n  }\n}(typeof self !== 'undefined' ? self : this, function () {\n  function getCurrentScript () {\n    var descriptor = Object.getOwnPropertyDescriptor(document, 'currentScript')\n    // for chrome\n    if (!descriptor && 'currentScript' in document && document.currentScript) {\n      return document.currentScript\n    }\n\n    // for other browsers with native support for currentScript\n    if (descriptor && descriptor.get !== getCurrentScript && document.currentScript) {\n      return document.currentScript\n    }\n  \n    // IE 8-10 support script readyState\n    // IE 11+ & Firefox support stack trace\n    try {\n      throw new Error();\n    }\n    catch (err) {\n      // Find the second match for the \"at\" string to get file src url from stack.\n      var ieStackRegExp = /.*at [^(]*\\((.*):(.+):(.+)\\)$/ig,\n        ffStackRegExp = /@([^@]*):(\\d+):(\\d+)\\s*$/ig,\n        stackDetails = ieStackRegExp.exec(err.stack) || ffStackRegExp.exec(err.stack),\n        scriptLocation = (stackDetails && stackDetails[1]) || false,\n        line = (stackDetails && stackDetails[2]) || false,\n        currentLocation = document.location.href.replace(document.location.hash, ''),\n        pageSource,\n        inlineScriptSourceRegExp,\n        inlineScriptSource,\n        scripts = document.getElementsByTagName('script'); // Live NodeList collection\n  \n      if (scriptLocation === currentLocation) {\n        pageSource = document.documentElement.outerHTML;\n        inlineScriptSourceRegExp = new RegExp('(?:[^\\\\n]+?\\\\n){0,' + (line - 2) + '}[^<]*<script>([\\\\d\\\\D]*?)<\\\\/script>[\\\\d\\\\D]*', 'i');\n        inlineScriptSource = pageSource.replace(inlineScriptSourceRegExp, '$1').trim();\n      }\n  \n      for (var i = 0; i < scripts.length; i++) {\n        // If ready state is interactive, return the script tag\n        if (scripts[i].readyState === 'interactive') {\n          return scripts[i];\n        }\n  \n        // If src matches, return the script tag\n        if (scripts[i].src === scriptLocation) {\n          return scripts[i];\n        }\n  \n        // If inline source matches, return the script tag\n        if (\n          scriptLocation === currentLocation &&\n          scripts[i].innerHTML &&\n          scripts[i].innerHTML.trim() === inlineScriptSource\n        ) {\n          return scripts[i];\n        }\n      }\n  \n      // If no match, return null\n      return null;\n    }\n  };\n\n  return getCurrentScript\n}));\n","/**\n * Date:2020/11/9\n * Desc:\n */\n/**\n * Date:2020/11/2\n * Desc: ptz cmd 封装\n * cmd[0] //首字节以05H开头\n * cmd[1] //组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码\n *        //  校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16\n * cmd[2] //地址的低8位？？？什么地址，地址范围000h ~ FFFh(0~4095),其中000h为广播地址\n * cmd[3] //指令码\n * cmd[4] //数据1,水平控制速度、聚焦速度\n * cmd[5] //数据2，垂直控制速度、光圈速度\n * cmd[6] // 高4位为数据3=变倍控制速度，低4位为地址高4位\n */\n\nconst PTZ_TYPE = {\n    stop: 'stop',\n    right: 'right',\n    left: 'left',\n    up: 'up',\n    down: 'down',\n    leftUp: 'leftUp',\n    leftDown: 'leftDown',\n    rightUp: 'rightUp',\n    rightDown: 'rightDown',\n    zoomFar: 'zoomFar',\n    zoomNear: 'zoomNear',\n    apertureFar: 'apertureFar',\n    apertureNear: 'apertureNear',\n    focusFar: 'focusFar',\n    focusNear: 'focusNear',\n    setPos: 'setPos',\n    calPos: 'calPos',\n    delPos: 'delPos'\n};\n\nconst PTZ_CMD_TYPE = {\n    stop: 0x00,\n\n    right: 0x01,\n    left: 0x02,\n    up: 0x08,\n    down: 0x04,\n\n    leftUp: 0x0A,\n    leftDown: 0x06,\n    rightUp: 0x09,\n    rightDown: 0x05,\n\n    zoomFar: 0x10, // 镜头 放大\n    zoomNear: 0x20,  // 镜头 缩小\n\n    apertureFar: 0x48, // 光圈 缩小\n    apertureNear: 0x44, // 光圈 放大\n\n    focusFar: 0x42, // 聚焦 近\n    focusNear: 0x41, // 聚焦 远\n\n    setPos: 0x81,\n    calPos: 0x82,\n    delPos: 0x83\n};\n\nconst SPEED_ARRAY = [0x19, 0x32, 0x4b, 0x64, 0x7d, 0x96, 0xAF, 0xC8, 0xE1, 0xFA];\nconst POSITION_ARRAY = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10];\n\n// 获取 direction 方向型\n/**\n *\n * @param options\n *        type:\n *        speed:default 5\n *        index:\n * @returns {string}\n */\nfunction getPTZCmd(options) {\n    const {type, speed, index} = options;\n    const ptzSpeed = getPTZSpeed(speed);\n    let indexValue3, indexValue4, indexValue5, indexValue6;\n    indexValue3 = PTZ_CMD_TYPE[type];\n    switch (type) {\n        case PTZ_TYPE.up:\n        case PTZ_TYPE.down:\n        case PTZ_TYPE.apertureFar:\n        case PTZ_TYPE.apertureNear:\n            indexValue5 = ptzSpeed;\n            break;\n        case PTZ_TYPE.right:\n        case PTZ_TYPE.left:\n        case PTZ_TYPE.focusFar:\n        case PTZ_TYPE.focusNear:\n            indexValue4 = ptzSpeed;\n            break;\n        case PTZ_TYPE.leftUp:\n        case PTZ_TYPE.leftDown:\n        case PTZ_TYPE.rightUp:\n        case PTZ_TYPE.rightDown:\n            indexValue4 = ptzSpeed;\n            indexValue5 = ptzSpeed;\n            break;\n        case PTZ_TYPE.zoomFar:\n        case PTZ_TYPE.zoomNear:\n            indexValue6 = 0x10;\n            break;\n        case PTZ_TYPE.calPos:\n        case PTZ_TYPE.delPos:\n        case PTZ_TYPE.setPos:\n            indexValue5 = getPTZPositionIndex(index);\n            break;\n        default:\n            break;\n    }\n    return ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6);\n}\n\nfunction getPTZSpeed(speed) {\n    speed = speed || 5;\n    const speedIndex = speed - 1;\n    const ptzSpeed = SPEED_ARRAY[speedIndex] || SPEED_ARRAY[4];\n    return ptzSpeed;\n}\n\nfunction getPTZPositionIndex(index) {\n    return POSITION_ARRAY[index - 1];\n}\n\nfunction ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6) {\n    //\n    let cmd = Buffer.alloc(8);\n    // 首字节以05H开头\n    cmd[0] = 0xA5;\n    // 组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码\n    cmd[1] = 0x0F;\n    // 校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16\n    cmd[2] = 0x01;\n    //\n    if (indexValue3) {\n        cmd[3] = indexValue3;\n    }\n    if (indexValue4) {\n        cmd[4] = indexValue4;\n    }\n    if (indexValue5) {\n        cmd[5] = indexValue5;\n    }\n    if (indexValue6) {\n        cmd[6] = indexValue6;\n    }\n\n    cmd[7] = (cmd[0] + cmd[1] + cmd[2] + cmd[3] + cmd[4] + cmd[5] + cmd[6]) % 256;\n\n    return bytes2HexString(cmd);\n}\n\nfunction bytes2HexString(byte) {\n    let hexs = \"\";\n    for (let i = 0; i < byte.length; i++) {\n        let hex = (byte[i]).toString(16);\n        if (hex.length === 1) {\n            hex = '0' + hex;\n        }\n        hexs += hex.toUpperCase();\n    }\n    return hexs;\n}\n\nexport {\n    getPTZCmd,\n    PTZ_TYPE\n}\n","/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */\nexports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = ((value * c) - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\n/*\n * Export kMaxLength after typed array support is determined.\n */\nexports.kMaxLength = kMaxLength()\n\nfunction typedArraySupport () {\n  try {\n    var arr = new Uint8Array(1)\n    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}\n    return arr.foo() === 42 && // typed array instances can be augmented\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\nfunction createBuffer (that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length')\n  }\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length)\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length)\n    }\n    that.length = length\n  }\n\n  return that\n}\n\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\nfunction Buffer (arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length)\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error(\n        'If encoding is specified then the first argument must be a string'\n      )\n    }\n    return allocUnsafe(this, arg)\n  }\n  return from(this, arg, encodingOrOffset, length)\n}\n\nBuffer.poolSize = 8192 // not used by this implementation\n\n// TODO: Legacy, not needed anymore. Remove in next major version.\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype\n  return arr\n}\n\nfunction from (that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length)\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset)\n  }\n\n  return fromObject(that, value)\n}\n\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length)\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n  if (typeof Symbol !== 'undefined' && Symbol.species &&\n      Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    })\n  }\n}\n\nfunction assertSize (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number')\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative')\n  }\n}\n\nfunction alloc (that, size, fill, encoding) {\n  assertSize(size)\n  if (size <= 0) {\n    return createBuffer(that, size)\n  }\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string'\n      ? createBuffer(that, size).fill(fill, encoding)\n      : createBuffer(that, size).fill(fill)\n  }\n  return createBuffer(that, size)\n}\n\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding)\n}\n\nfunction allocUnsafe (that, size) {\n  assertSize(size)\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size)\n}\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size)\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8'\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding')\n  }\n\n  var length = byteLength(string, encoding) | 0\n  that = createBuffer(that, length)\n\n  var actual = that.write(string, encoding)\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual)\n  }\n\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0\n  that = createBuffer(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array, byteOffset, length) {\n  array.byteLength // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds')\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds')\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array)\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset)\n  } else {\n    array = new Uint8Array(array, byteOffset, length)\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array)\n  }\n  return that\n}\n\nfunction fromObject (that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0\n    that = createBuffer(that, len)\n\n    if (that.length === 0) {\n      return that\n    }\n\n    obj.copy(that, 0, 0, len)\n    return that\n  }\n\n  if (obj) {\n    if ((typeof ArrayBuffer !== 'undefined' &&\n        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0)\n      }\n      return fromArrayLike(that, obj)\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data)\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (length) {\n  if (+length != length) { // eslint-disable-line eqeqeq\n    length = 0\n  }\n  return Buffer.alloc(+length)\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i]\n      y = b[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers')\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length)\n  var pos = 0\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i]\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers')\n    }\n    buf.copy(buffer, pos)\n    pos += buf.length\n  }\n  return buffer\n}\n\nfunction byteLength (string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length\n  }\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&\n      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength\n  }\n  if (typeof string !== 'string') {\n    string = '' + string\n  }\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n  if (start === undefined || start < 0) {\n    start = 0\n  }\n  // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n  if (start > this.length) {\n    return ''\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length\n  }\n\n  if (end <= 0) {\n    return ''\n  }\n\n  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n  end >>>= 0\n  start >>>= 0\n\n  if (end <= start) {\n    return ''\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\n// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\nBuffer.prototype._isBuffer = true\n\nfunction swap (b, n, m) {\n  var i = b[n]\n  b[n] = b[m]\n  b[m] = i\n}\n\nBuffer.prototype.swap16 = function swap16 () {\n  var len = this.length\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits')\n  }\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1)\n  }\n  return this\n}\n\nBuffer.prototype.swap32 = function swap32 () {\n  var len = this.length\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits')\n  }\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3)\n    swap(this, i + 1, i + 2)\n  }\n  return this\n}\n\nBuffer.prototype.swap64 = function swap64 () {\n  var len = this.length\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits')\n  }\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7)\n    swap(this, i + 1, i + 6)\n    swap(this, i + 2, i + 5)\n    swap(this, i + 3, i + 4)\n  }\n  return this\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer')\n  }\n\n  if (start === undefined) {\n    start = 0\n  }\n  if (end === undefined) {\n    end = target ? target.length : 0\n  }\n  if (thisStart === undefined) {\n    thisStart = 0\n  }\n  if (thisEnd === undefined) {\n    thisEnd = this.length\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index')\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0\n  }\n  if (thisStart >= thisEnd) {\n    return -1\n  }\n  if (start >= end) {\n    return 1\n  }\n\n  start >>>= 0\n  end >>>= 0\n  thisStart >>>= 0\n  thisEnd >>>= 0\n\n  if (this === target) return 0\n\n  var x = thisEnd - thisStart\n  var y = end - start\n  var len = Math.min(x, y)\n\n  var thisCopy = this.slice(thisStart, thisEnd)\n  var targetCopy = target.slice(start, end)\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i]\n      y = targetCopy[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\n// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\nfunction bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1\n\n  // Normalize byteOffset\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset\n    byteOffset = 0\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000\n  }\n  byteOffset = +byteOffset  // Coerce to Number.\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : (buffer.length - 1)\n  }\n\n  // Normalize byteOffset: negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1\n    else byteOffset = buffer.length - 1\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0\n    else return -1\n  }\n\n  // Normalize val\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding)\n  }\n\n  // Finally, search either indexOf (if dir is true) or lastIndexOf\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1\n    }\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)\n  } else if (typeof val === 'number') {\n    val = val & 0xFF // Search for a byte value [0-255]\n    if (Buffer.TYPED_ARRAY_SUPPORT &&\n        typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)\n      }\n    }\n    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\nfunction arrayIndexOf (arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1\n  var arrLength = arr.length\n  var valLength = val.length\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase()\n    if (encoding === 'ucs2' || encoding === 'ucs-2' ||\n        encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1\n      }\n      indexSize = 2\n      arrLength /= 2\n      valLength /= 2\n      byteOffset /= 2\n    }\n  }\n\n  function read (buf, i) {\n    if (indexSize === 1) {\n      return buf[i]\n    } else {\n      return buf.readUInt16BE(i * indexSize)\n    }\n  }\n\n  var i\n  if (dir) {\n    var foundIndex = -1\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex\n        foundIndex = -1\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false\n          break\n        }\n      }\n      if (found) return i\n    }\n  }\n\n  return -1\n}\n\nBuffer.prototype.includes = function includes (val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)\n}\n\nBuffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) return i\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction latin1Write (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    throw new Error(\n      'Buffer.write(string, encoding, offset[, length]) is no longer supported'\n    )\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction latin1Slice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end)\n    newBuf.__proto__ = Buffer.prototype\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n  if (offset < 0) throw new RangeError('Index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    Uint8Array.prototype.set.call(\n      target,\n      this.subarray(start, start + len),\n      targetStart\n    )\n  }\n\n  return len\n}\n\n// Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\nBuffer.prototype.fill = function fill (val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start\n      start = 0\n      end = this.length\n    } else if (typeof end === 'string') {\n      encoding = end\n      end = this.length\n    }\n    if (val.length === 1) {\n      var code = val.charCodeAt(0)\n      if (code < 256) {\n        val = code\n      }\n    }\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string')\n    }\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding)\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255\n  }\n\n  // Invalid ranges are not set to a default, so can range check early.\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index')\n  }\n\n  if (end <= start) {\n    return this\n  }\n\n  start = start >>> 0\n  end = end === undefined ? this.length : end >>> 0\n\n  if (!val) val = 0\n\n  var i\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val)\n      ? val\n      : utf8ToBytes(new Buffer(val, encoding).toString())\n    var len = bytes.length\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    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_vm.ptzCmd(_vm.ptzType.focusNear)}}},[_c('path',{attrs:{\"d\":\"M512 170.666667A341.333333 341.333333 0 1 1 170.666667 512 341.333333 341.333333 0 0 1 512 170.666667m0-42.666667a384 384 0 1 0 384 384A384 384 0 0 0 512 128z\"}}),_c('path',{attrs:{\"fill\":\"#333333\",\"d\":\"M298.666667 533.333333H170.666667a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM853.333333 533.333333h-128a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM512 320a21.333333 21.333333 0 0 1-21.333333-21.333333V170.666667a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333333zM512 874.666667a21.333333 21.333333 0 0 1-21.333333-21.333334v-128a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333334z\"}})])]),_c('div',{staticClass:\"control5\"},[_c('i-select',{staticStyle:{\"width\":\"100px\"},model:{value:(_vm.ptzPositionIndex),callback:function ($$v) {_vm.ptzPositionIndex=$$v},expression:\"ptzPositionIndex\"}},_vm._l((10),function(n){return _c('Option',{key:n,attrs:{\"value\":n}},[_vm._v(\"预置点\"+_vm._s(n))])}),1),_c('i-button',{attrs:{\"type\":\"primary\"},on:{\"click\":function($event){return _vm.ptzCmd(_vm.ptzType.setPos)}}},[_vm._v(\"设置\")]),_c('i-button',{attrs:{\"type\":\"success\"},on:{\"click\":function($event){return _vm.ptzCmd(_vm.ptzType.calPos)}}},[_vm._v(\"调用\")]),_c('i-button',{attrs:{\"type\":\"error\"},on:{\"click\":function($event){return _vm.ptzCmd(_vm.ptzType.delPos)}}},[_vm._v(\"删除\")]),_vm._v(\" 速度： \"),_c('InputNumber',{attrs:{\"max\":10,\"min\":1},model:{value:(_vm.ptzSpeed),callback:function ($$v) {_vm.ptzSpeed=$$v},expression:\"ptzSpeed\"}})],1)]),_c('div',{attrs:{\"slot\":\"footer\"},slot:\"footer\"},[(_vm.remoteSDP)?_c('mu-badge',[_c('a',{attrs:{\"slot\":\"content\",\"href\":_vm.remoteSDPURL,\"download\":\"remoteSDP.txt\"},slot:\"content\"},[_vm._v(\"remoteSDP\")])]):_vm._e(),(_vm.localSDP)?_c('mu-badge',[_c('a',{attrs:{\"slot\":\"content\",\"href\":_vm.localSDPURL,\"download\":\"localSDP.txt\"},slot:\"content\"},[_vm._v(\"localSDP\")])]):_vm._e()],1)])}\nvar staticRenderFns = []\n\nexport { render, staticRenderFns }","<template>\n  <Modal\n    v-bind=\"$attrs\"\n    draggable\n    width=\"750\"\n    v-on=\"$listeners\"\n    :title=\"streamPath\"\n    @on-ok=\"onClosePreview\"\n    @on-cancel=\"onClosePreview\"\n  >\n    <div class=\"container\">\n      <video ref=\"webrtc\" :srcObject.prop=\"stream\" width=\"488\" height=\"275\" autoplay muted controls></video>\n      <div class=\"control\">\n        <svg v-for=\"n in 8\" @click=\"ptzCmdDirection(n)\" :class=\"'arrow'+n\" viewBox=\"0 0 1024 1024\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"64\" height=\"64\"><defs><style type=\"text/css\"></style></defs><path d=\"M682.666667 955.733333H341.333333a17.066667 17.066667 0 0 1-17.066666-17.066666V529.066667H85.333333a17.066667 17.066667 0 0 1-12.066133-29.1328l426.666667-426.666667a17.0496 17.0496 0 0 1 24.132266 0l426.666667 426.666667A17.066667 17.066667 0 0 1 938.666667 529.066667H699.733333v409.6a17.066667 17.066667 0 0 1-17.066666 17.066666z m-324.266667-34.133333h307.2V512a17.066667 17.066667 0 0 1 17.066667-17.066667h214.801066L512 109.4656 126.532267 494.933333H341.333333a17.066667 17.066667 0 0 1 17.066667 17.066667v409.6z\" p-id=\"6849\"></path></svg>\n        <svg @mousedown=\"startPtzCmdCycle\" @mouseup=\"stopPtzCmdCycle\" class=\"arrow9\" viewBox=\"0 0 1024 1024\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\"><path d=\"M512 960c-210.96 0-395.36-149.68-438.47-355.91-2.98-14.24 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@click=\"ptzCmd(ptzType.zoomNear)\" viewBox=\"0 0 1024 1024\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\"><path d=\"M994.990643 859.352971L713.884166 578.246494A381.208198 381.208198 0 0 0 767.307984 383.653992C767.307984 171.765089 595.542895 0 383.653992 0S0 171.765089 0 383.653992s171.765089 383.653992 383.653992 383.653992c71.119859 0 137.507985-19.694238 194.592502-53.423818l281.106477 281.090491a95.913498 95.913498 0 1 0 135.637672-135.621686zM383.653992 671.394486c-158.912681 0-287.740494-128.827813-287.740494-287.740494S224.741311 95.913498 383.653992 95.913498s287.740494 128.827813 287.740494 287.740494-128.827813 287.740494-287.740494 287.740494z m159.85583-335.697243H223.798162a47.956749 47.956749 0 1 0 0 95.913498h319.71166a47.956749 47.956749 0 1 0 0-95.913498z\"  /></svg>\n      </div>\n      <div class=\"control control3\">\n        <svg @click=\"ptzCmd(ptzType.apertureFar)\" viewBox=\"0 0 1024 1024\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\"><path 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341.333333 0 0 1 512 170.666667m0-42.666667a384 384 0 1 0 384 384A384 384 0 0 0 512 128z\"  /><path fill=\"#333333\" d=\"M298.666667 533.333333H170.666667a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM853.333333 533.333333h-128a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM512 320a21.333333 21.333333 0 0 1-21.333333-21.333333V170.666667a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333333zM512 874.666667a21.333333 21.333333 0 0 1-21.333333-21.333334v-128a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333334z\"  /></svg>\n      </div>\n      <div class=\"control5\">\n        <i-select v-model=\"ptzPositionIndex\" style=\"width: 100px\">\n          <Option v-for=\"n in 10\" :value=\"n\" :key=\"n\">预置点{{n}}</Option>\n        </i-select>\n        <i-button type=\"primary\" @click=\"ptzCmd(ptzType.setPos)\">设置</i-button>\n        <i-button type=\"success\" @click=\"ptzCmd(ptzType.calPos)\">调用</i-button>\n        <i-button type=\"error\" @click=\"ptzCmd(ptzType.delPos)\">删除</i-button>\n        速度：\n        <InputNumber :max=\"10\" :min=\"1\" v-model=\"ptzSpeed\"></InputNumber>\n      </div>\n    </div>\n    <div slot=\"footer\">\n      <mu-badge v-if=\"remoteSDP\">\n        <a slot=\"content\" :href=\"remoteSDPURL\" download=\"remoteSDP.txt\">remoteSDP</a>\n      </mu-badge>\n      <mu-badge v-if=\"localSDP\">\n        <a slot=\"content\" :href=\"localSDPURL\" download=\"localSDP.txt\">localSDP</a>\n      </mu-badge>\n    </div>\n  </Modal>\n</template>\n<script>\n  import {PTZ_TYPE} from \"../utils/ptz-cmd\";\n  const PTZ_DIRECTION_ARRAY = [PTZ_TYPE.up,PTZ_TYPE.right,PTZ_TYPE.down,PTZ_TYPE.left,PTZ_TYPE.leftUp,PTZ_TYPE.rightUp,PTZ_TYPE.leftDown,PTZ_TYPE.rightDown];\n  let pc = null;\nexport default {\n  data() {\n    return {\n      iceConnectionState: pc && pc.iceConnectionState,\n      stream: null,\n      localSDP: \"\",\n      remoteSDP: \"\",\n      remoteSDPURL: \"\",\n      localSDPURL: \"\",\n      streamPath: \"\",\n      ptzSpeed:5,\n      ptzPositionIndex:1,\n      ptzType:PTZ_TYPE,\n    };\n  },\n  props:{\n    PublicIP:String\n  },\n    methods: {\n        async play(streamPath) {\n            pc = new RTCPeerConnection();\n            pc.addTransceiver('video',{\n              direction:'recvonly'\n            })\n            this.streamPath = streamPath;\n            pc.onsignalingstatechange = e => {\n                //console.log(e);\n            };\n            pc.oniceconnectionstatechange = e => {\n                this.$toast.info(pc.iceConnectionState);\n                this.iceConnectionState = pc.iceConnectionState;\n            };\n            pc.onicecandidate = event => {\n                console.log(event)\n            };\n            pc.ontrack = event => {\n               // console.log(event);\n                if (event.track.kind == \"video\")\n                    this.stream = event.streams[0];\n            };\n            await pc.setLocalDescription(await pc.createOffer());\n            this.localSDP = pc.localDescription.sdp;\n            this.localSDPURL = URL.createObjectURL(\n                new Blob([this.localSDP], { type: \"text/plain\" })\n            );\n            const result = await this.ajax({\n                type: \"POST\",\n                processData: false,\n                data: JSON.stringify(pc.localDescription.toJSON()),\n                url: \"/webrtc/play?streamPath=\" + this.streamPath,\n                dataType: \"json\"\n            });\n            if (result.errmsg) {\n                this.$toast.error(result.errmsg);\n                return;\n            } else {\n                this.remoteSDP = result.sdp;\n                this.remoteSDPURL = URL.createObjectURL(new Blob([this.remoteSDP], { type: \"text/plain\" }));\n            }\n            await pc.setRemoteDescription(new RTCSessionDescription(result));\n        },\n        ptzCmdDirection(direction){\n          const type = PTZ_DIRECTION_ARRAY[direction-1];\n          this.ptzCmd(type);\n        },\n        startPtzCmdCycle(){\n          this.ptzCmd(PTZ_TYPE.right,true);\n        },\n        stopPtzCmdCycle(){\n          this.ptzCmd(PTZ_TYPE.stop);\n        },\n        ptzCmd(type,isCycling){\n          this.$emit('ptz',{type:type,speed:this.ptzSpeed,index:this.ptzPositionIndex,cycle:isCycling})\n        },\n        onClosePreview() {\n            pc.close();\n        }\n    }\n};\n</script>\n<style scoped>\n  .arrow1{\n    grid-column: 2;\n    grid-row: 1;\n  }\n  .arrow2{\n    transform: rotate(90deg);\n    grid-column: 3;\n    grid-row: 2;\n  }\n  .arrow3{\n    transform: rotate(180deg);\n    grid-column: 2;\n    grid-row: 3;\n  }\n  .arrow4{\n    transform: rotate(270deg);\n    grid-column: 1;\n    grid-row: 2;\n  }\n\n  .arrow5{\n    transform: rotate(-45deg);\n    grid-column: 1;\n    grid-row: 1;\n  }\n\n  .arrow6{\n    transform: rotate(45deg);\n    grid-column: 3;\n    grid-row: 1;\n  }\n\n  .arrow7{\n    transform: rotate(-135deg);\n    grid-column: 1;\n    grid-row: 3;\n  }\n\n  .arrow8{\n    transform: rotate(135deg);\n    grid-column: 3;\n    grid-row: 3;\n  }\n\n  .arrow9{\n    grid-column: 2;\n    grid-row: 2;\n  }\n\n.container {\n  position: relative;\n  height: 350px;\n}\n.control {\n  position: absolute;\n  top: 20px;\n  right: 0;\n  display: grid;\n  grid-template-columns: repeat(3, 33.33%);\n  grid-template-rows: repeat(3, 33.33%);\n  width: 192px;\n  height: 192px;\n}\n\n.control2{\n  top: 210px;\n}\n\n.control3{\n  top: 260px;\n}\n\n.control4{\n  top: 310px;\n}\n\n.control5{\n  top: 360px;\n}\n\n.control >* {\n  cursor: pointer;\n  fill: gray;\n  width: 50px;\n  height: 50px;\n}\n\n.control5 >*{\n  margin-right: 10px;\n}\n\n.control2 >*,.control3 >*,.control4 >*{\n  width: 40px;\n  height: 40px;\n}\n\n.control >*:hover,.cycling{\n  fill: cyan\n}\n\n\n\n</style>\n","import mod from \"-!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=script&lang=js&\"","/* globals __VUE_SSR_CONTEXT__ */\n\n// IMPORTANT: Do NOT use ES2015 features in this file (except for modules).\n// This module is a runtime utility for cleaner component module output and will\n// be included in the final webpack user bundle.\n\nexport default function normalizeComponent (\n  scriptExports,\n  render,\n  staticRenderFns,\n  functionalTemplate,\n  injectStyles,\n  scopeId,\n  moduleIdentifier, /* server only */\n  shadowMode /* vue-cli only */\n) {\n  // Vue.extend constructor export interop\n  var options = typeof scriptExports === 'function'\n    ? scriptExports.options\n    : scriptExports\n\n  // render functions\n  if (render) {\n    options.render = render\n    options.staticRenderFns = staticRenderFns\n    options._compiled = true\n  }\n\n  // functional template\n  if (functionalTemplate) {\n    options.functional = true\n  }\n\n  // scopedId\n  if (scopeId) {\n    options._scopeId = 'data-v-' + scopeId\n  }\n\n  var hook\n  if (moduleIdentifier) { // server build\n    hook = function (context) {\n      // 2.3 injection\n      context =\n        context || // cached call\n        (this.$vnode && this.$vnode.ssrContext) || // stateful\n        (this.parent && this.parent.$vnode && this.parent.$vnode.ssrContext) // functional\n      // 2.2 with runInNewContext: true\n      if (!context && typeof __VUE_SSR_CONTEXT__ !== 'undefined') {\n        context = __VUE_SSR_CONTEXT__\n      }\n      // inject component styles\n      if (injectStyles) {\n        injectStyles.call(this, context)\n      }\n      // register component module identifier for async chunk inferrence\n      if (context && context._registeredComponents) {\n        context._registeredComponents.add(moduleIdentifier)\n      }\n    }\n    // used by ssr in case component is cached and beforeCreate\n    // never gets called\n    options._ssrRegister = hook\n  } else if (injectStyles) {\n    hook = shadowMode\n      ? function () {\n        injectStyles.call(\n          this,\n          (options.functional ? this.parent : this).$root.$options.shadowRoot\n        )\n      }\n      : injectStyles\n  }\n\n  if (hook) {\n    if (options.functional) {\n      // for template-only hot-reload because in that case the render fn doesn't\n      // go through the normalizer\n      options._injectStyles = hook\n      // register for functional component in vue file\n      var originalRender = options.render\n      options.render = function renderWithStyleInjection (h, context) {\n        hook.call(context)\n        return originalRender(h, context)\n      }\n    } else {\n      // inject component registration as beforeCreate hook\n      var existing = options.beforeCreate\n      options.beforeCreate = existing\n        ? [].concat(existing, hook)\n        : [hook]\n    }\n  }\n\n  return {\n    exports: scriptExports,\n    options: options\n  }\n}\n","import { render, staticRenderFns } from \"./Player.vue?vue&type=template&id=76558468&scoped=true&\"\nimport script from \"./Player.vue?vue&type=script&lang=js&\"\nexport * from \"./Player.vue?vue&type=script&lang=js&\"\nimport style0 from \"./Player.vue?vue&type=style&index=0&id=76558468&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"76558468\",\n  null\n  \n)\n\nexport default component.exports","var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',{staticClass:\"player-wrap\"},[(_vm.rtcStream)?[_c('video',{attrs:{\"autoplay\":\"\",\"muted\":\"\",\"controls\":\"\"},domProps:{\"srcObject\":_vm.rtcStream,\"muted\":true}})]:_vm._e()],2)}\nvar staticRenderFns = []\n\nexport { render, staticRenderFns }","<template>\n    <div class=\"player-wrap\">\n        <template v-if=\"rtcStream\">\n            <video :srcObject.prop=\"rtcStream\" autoplay muted controls></video>\n        </template>\n    </div>\n</template>\n\n<script>\n    export default {\n        name: \"WebrtcPlayer\",\n        rtcPeerConnection: null,\n        data() {\n            return {\n                iceConnectionState: '',\n                rtcPeerConnectionInit: false,\n                rtcStream: null\n            }\n        },\n        props: {\n            streamPath: {\n                type: String,\n                default: ''\n            }\n        },\n        async created() {\n            await this.initRtcPeerConnection();\n            console.log('initRtcPeerConnectioned');\n            if (this.streamPath) {\n                await this.play(this.streamPath);\n                console.log('played');\n            }\n        },\n        methods: {\n            async initRtcPeerConnection() {\n                const rtcPeerConnection = new RTCPeerConnection();\n\n                rtcPeerConnection.addTransceiver('video', {\n                    direction: \"recvonly\"\n                });\n\n                rtcPeerConnection.onsignalingstatechange = e => {\n                    console.log('onsignalingstatechange', e);\n                };\n\n                rtcPeerConnection.oniceconnectionstatechange = e => {\n                    console.log('oniceconnectionstatechange', rtcPeerConnection.iceConnectionState);\n                };\n\n                rtcPeerConnection.onicecandidate = event => {\n                    console.log('onicecandidate', event);\n                };\n\n                rtcPeerConnection.ontrack = event => {\n                    console.log('ontrack', event);\n                    if (event.track.kind === \"video\") {\n                        this.rtcStream = event.streams[0];\n                    }\n                };\n\n                const rtcSessionDescriptionInit = await rtcPeerConnection.createOffer();\n                await rtcPeerConnection.setLocalDescription(rtcSessionDescriptionInit);\n                this.rtcPeerConnectionInit = true;\n                this.$options.rtcPeerConnection = rtcPeerConnection;\n            },\n\n            //\n            async play(streamPath) {\n                const rtcPeerConnection = this.$options.rtcPeerConnection;\n                const localDescriptionData = rtcPeerConnection.localDescription.toJSON();\n                const result = await this.ajax({\n                    type: \"POST\",\n                    processData: false,\n                    data: localDescriptionData,\n                    url: \"/webrtc/play?streamPath=\" + streamPath,\n                    dataType: \"json\"\n                });\n                if (result.error) {\n                    return;\n                }\n                //\n                rtcPeerConnection.setRemoteDescription(new RTCSessionDescription({\n                    type: result.type,\n                    sdp: result.sdp\n                }));\n            },\n            close() {\n                const rtcPeerConnection = this.$options.rtcPeerConnection;\n                rtcPeerConnection && rtcPeerConnection.close();\n            }\n        },\n        destroyed() {\n            this.close();\n        }\n    }\n</script>\n\n<style scoped>\n    .player-wrap {\n        width: 100%;\n        height: 100%;\n    }\n\n    .player-wrap video {\n        width: 100%;\n        height: 100%;\n    }\n</style>\n","import mod from \"-!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=script&lang=js&\"","import { render, staticRenderFns } from \"./Player2.vue?vue&type=template&id=379ce7fe&scoped=true&\"\nimport script from \"./Player2.vue?vue&type=script&lang=js&\"\nexport * from \"./Player2.vue?vue&type=script&lang=js&\"\nimport style0 from \"./Player2.vue?vue&type=style&index=0&id=379ce7fe&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"379ce7fe\",\n  null\n  \n)\n\nexport default component.exports","<template>\n    <div>\n        <div class=\"tabpanel\" v-if=\"$parent.titleTabActive === 0\">\n            <mu-data-table :data=\"Devices\" :columns=\"columns\">\n                <template #expand=\"prop\">\n                    <mu-data-table :data=\"prop.row.Channels\" :columns=\"columns2\">\n                        <template #default=\"{ row: item, $index }\">\n                            <td>{{ item.DeviceID }}</td>\n                            <td>{{ item.Name }}</td>\n                            <td>{{ item.Manufacturer }}</td>\n                            <td>{{ item.Address }}</td>\n                            <td>{{ item.Status }}</td>\n                            <td>\n                                <mu-button flat v-if=\"item.Connected\" @click=\"ptz(prop.row.ID, $index,item)\">云台\n                                </mu-button>\n                                <mu-button flat v-if=\"item.Connected\" @click=\"bye(prop.row.ID, $index)\">断开</mu-button>\n                                <mu-button v-else flat @click=\"invite(prop.row.ID, $index,item)\"\n                                >连接\n                                </mu-button\n                                >\n                            </td>\n                        </template>\n                    </mu-data-table>\n                </template>\n                <template #default=\"{ row: item }\">\n                    <td>{{ item.ID }}</td>\n                    <td>{{ item.Channels ? item.Channels.length : 0 }}</td>\n                    <td>\n                        <StartTime :value=\"item.RegisterTime\"></StartTime>\n                    </td>\n                    <td>\n                        <StartTime :value=\"item.UpdateTime\"></StartTime>\n                    </td>\n                    <td>{{ item.Status }}</td>\n                </template>\n            </mu-data-table>\n        </div>\n        <div class=\"tabpanel\" v-if=\"$parent.titleTabActive === 1\">\n            <div class=\"search\">\n            <i-select v-model=\"channelSelectedList\" multiple>\n              <Option v-for=\"(channel,index) in channelList\"\n                      :value=\"channel\"\n                      :label=\"channel.DeviceID + '(' + channel.Name + ')'\"\n                      :key=\"index\">\n              </Option>\n            </i-select>\n            </div>\n            <div class=\"flex-box\">\n                <template v-for=\"(channel,index) in channelSelectedList\">\n                    <div class=\"flex-item\" :key=\"index\" v-if=\"channel.ID\">\n                        <webrtc-player2 :stream-path=\"'gb28181/'+channel.ID\"></webrtc-player2>\n                    </div>\n                </template>\n            </div>\n        </div>\n        <webrtc-player ref=\"player\" @ptz=\"sendPtz\" v-model=\"previewStreamPath\" :PublicIP=\"PublicIP\"></webrtc-player>\n    </div>\n</template>\n<script>\n    import WebrtcPlayer from \"./components/Player\"\n    import WebrtcPlayer2 from \"./components/Player2\";\n    import {getPTZCmd, PTZ_TYPE} from \"./utils/ptz-cmd\";\n\n    export default {\n        components: {\n            WebrtcPlayer,\n            WebrtcPlayer2\n        },\n        props: {\n            ListenAddr: String\n        },\n        computed: {\n            PublicIP() {\n                return this.ListenAddr.split(\":\")[0]\n            }\n        },\n        data() {\n            return {\n                Devices: [], previewStreamPath: false,\n                channelList: [],\n                channelSelectedList:[],\n                context: {\n                    id: null,\n                    channel: 0,\n                    item: null\n                },\n                columns: Object.freeze(\n                    [\"设备号\", \"通道数\", \"注册时间\", \"更新时间\", \"状态\"].map(\n                        (title) => ({\n                            title,\n                        })\n                    )\n                ),\n                columns2: Object.freeze([\n                    \"通道编号\",\n                    \"名称\",\n                    \"厂商\",\n                    \"地址\",\n                    \"状态\",\n                    \"操作\",\n                ]).map((title) => ({title})),\n            };\n        },\n        created() {\n            this.fetchlist();\n        },\n        mounted() {\n            this.$parent.titleTabs = [\"列表\", \"N路播放\"];\n        },\n        methods: {\n            fetchlist() {\n                const listES = new EventSource(this.apiHost + \"/gb28181/list\");\n                listES.onmessage = (evt) => {\n                    if (!evt.data) return;\n                    this.Devices = JSON.parse(evt.data) || [];\n                    this.Devices.sort((a, b) => (a.ID > b.ID ? 1 : -1));\n                    let channelList =[]\n                    this.Devices.forEach((device)=>{\n                      const channels = device.Channels || [];\n                      if(channels.length > 0){\n                          channelList = channelList.concat(channels);\n                      }\n                    });\n                    if(channelList.length > 0){\n                        this.channelList = channelList;\n                    }\n                };\n                this.$once(\"hook:destroyed\", () => listES.close());\n            },\n            ptz(id, channel, item) {\n                this.context = {\n                    id, channel, item\n                };\n                this.previewStreamPath = true\n                this.$nextTick(() => this.$refs.player.play(\"gb28181/\" + item.DeviceID));\n            },\n            sendPtz(options) {\n                const ptzCmd = getPTZCmd(options);\n                const ptzCmdStop = getPTZCmd({type: PTZ_TYPE.stop});\n                this.ajax.get(\"/gb28181/control\", {\n                    id: this.context.id,\n                    channel: this.context.channel,\n                    ptzcmd: ptzCmd,\n                }).then(x => {\n                    if (options.type === PTZ_TYPE.stop || options.cycle === true) {\n                        return;\n                    }\n                    setTimeout(() => {\n                        this.ajax.get(\"/gb28181/control\", {\n                            id: this.context.id,\n                            channel: this.context.channel,\n                            ptzcmd: ptzCmdStop,\n                        });\n                    }, 500)\n                });\n            },\n            invite(id, channel, item) {\n                this.ajax.get(\"/gb28181/invite\", {id, channel}).then(x => {\n                    item.Connected = true\n                });\n            },\n            bye(id, channel, item) {\n                this.ajax.get(\"/gb28181/bye\", {id, channel}).then(x => {\n                    item.Connected = false\n                });\n            }\n        },\n    };\n</script>\n<style scoped>\n    .flex-box {\n        display: flex;\n        flex-flow: row wrap;\n        align-content: flex-start;\n    }\n\n    .flex-item {\n        flex: 0 0 33.3333%;\n        height: 275px;\n        padding: 10px;\n    }\n</style>\n","import mod from \"-!../node_modules/cache-loader/dist/cjs.js??ref--0-0!../node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../node_modules/cache-loader/dist/cjs.js??ref--0-0!../node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=script&lang=js&\"","import { render, staticRenderFns } from \"./App.vue?vue&type=template&id=77f8f0e9&scoped=true&\"\nimport script from \"./App.vue?vue&type=script&lang=js&\"\nexport * from \"./App.vue?vue&type=script&lang=js&\"\nimport style0 from \"./App.vue?vue&type=style&index=0&id=77f8f0e9&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"77f8f0e9\",\n  null\n  \n)\n\nexport default component.exports","import './setPublicPath'\nimport mod from '~entry'\nexport default mod\nexport * from '~entry'\n"],"sourceRoot":""}
\ No newline at end of file
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Uint8Array : Array\n\nvar code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'\nfor (var i = 0, len = code.length; i < len; ++i) {\n  lookup[i] = code[i]\n  revLookup[code.charCodeAt(i)] = i\n}\n\n// Support decoding URL-safe base64 strings, as Node.js does.\n// See: https://en.wikipedia.org/wiki/Base64#URL_applications\nrevLookup['-'.charCodeAt(0)] = 62\nrevLookup['_'.charCodeAt(0)] = 63\n\nfunction getLens (b64) {\n  var len = b64.length\n\n  if (len % 4 > 0) {\n    throw new Error('Invalid string. Length must be a multiple of 4')\n  }\n\n  // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n  var validLen = b64.indexOf('=')\n  if (validLen === -1) validLen = len\n\n  var placeHoldersLen = validLen === len\n    ? 0\n    : 4 - (validLen % 4)\n\n  return [validLen, placeHoldersLen]\n}\n\n// base64 is 4/3 + up to two characters of the original data\nfunction byteLength (b64) {\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction _byteLength (b64, validLen, placeHoldersLen) {\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction toByteArray (b64) {\n  var tmp\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))\n\n  var curByte = 0\n\n  // if there are placeholders, only get up to the last complete 4 chars\n  var len = placeHoldersLen > 0\n    ? validLen - 4\n    : validLen\n\n  var i\n  for (i = 0; i < len; i += 4) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 18) |\n      (revLookup[b64.charCodeAt(i + 1)] << 12) |\n      (revLookup[b64.charCodeAt(i + 2)] << 6) |\n      revLookup[b64.charCodeAt(i + 3)]\n    arr[curByte++] = (tmp >> 16) & 0xFF\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 2) |\n      (revLookup[b64.charCodeAt(i + 1)] >> 4)\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 10) |\n      (revLookup[b64.charCodeAt(i + 1)] << 4) |\n      (revLookup[b64.charCodeAt(i + 2)] >> 2)\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  return arr\n}\n\nfunction tripletToBase64 (num) {\n  return lookup[num >> 18 & 0x3F] +\n    lookup[num >> 12 & 0x3F] +\n    lookup[num >> 6 & 0x3F] +\n    lookup[num & 0x3F]\n}\n\nfunction encodeChunk (uint8, start, end) {\n  var tmp\n  var output = []\n  for (var i = start; i < end; i += 3) {\n    tmp =\n      ((uint8[i] << 16) & 0xFF0000) +\n      ((uint8[i + 1] << 8) & 0xFF00) +\n      (uint8[i + 2] & 0xFF)\n    output.push(tripletToBase64(tmp))\n  }\n  return output.join('')\n}\n\nfunction fromByteArray (uint8) {\n  var tmp\n  var len = uint8.length\n  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes\n  var parts = []\n  var maxChunkLength = 16383 // must be multiple of 3\n\n  // go through the array every three bytes, we'll deal with trailing stuff later\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(\n      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)\n    ))\n  }\n\n  // pad the end with zeros, but make sure to not forget the extra bytes\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 2] +\n      lookup[(tmp << 4) & 0x3F] +\n      '=='\n    )\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 10] +\n      lookup[(tmp >> 4) & 0x3F] +\n      lookup[(tmp << 2) & 0x3F] +\n      '='\n    )\n  }\n\n  return parts.join('')\n}\n","import mod from \"-!../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=style&index=0&id=7bad0327&scoped=true&lang=css&\"; export default mod; export * from \"-!../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=style&index=0&id=7bad0327&scoped=true&lang=css&\"","import mod from \"-!../../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=style&index=0&id=a6774e8e&scoped=true&lang=css&\"; export default mod; export * from \"-!../../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=style&index=0&id=a6774e8e&scoped=true&lang=css&\"","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\n/*\n * Export kMaxLength after typed array support is determined.\n */\nexports.kMaxLength = kMaxLength()\n\nfunction typedArraySupport () {\n  try {\n    var arr = new Uint8Array(1)\n    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}\n    return arr.foo() === 42 && // typed array instances can be augmented\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\nfunction createBuffer (that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length')\n  }\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length)\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length)\n    }\n    that.length = length\n  }\n\n  return that\n}\n\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\nfunction Buffer (arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length)\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error(\n        'If encoding is specified then the first argument must be a string'\n      )\n    }\n    return allocUnsafe(this, arg)\n  }\n  return from(this, arg, encodingOrOffset, length)\n}\n\nBuffer.poolSize = 8192 // not used by this implementation\n\n// TODO: Legacy, not needed anymore. Remove in next major version.\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype\n  return arr\n}\n\nfunction from (that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length)\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset)\n  }\n\n  return fromObject(that, value)\n}\n\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length)\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n  if (typeof Symbol !== 'undefined' && Symbol.species &&\n      Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    })\n  }\n}\n\nfunction assertSize (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number')\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative')\n  }\n}\n\nfunction alloc (that, size, fill, encoding) {\n  assertSize(size)\n  if (size <= 0) {\n    return createBuffer(that, size)\n  }\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string'\n      ? createBuffer(that, size).fill(fill, encoding)\n      : createBuffer(that, size).fill(fill)\n  }\n  return createBuffer(that, size)\n}\n\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding)\n}\n\nfunction allocUnsafe (that, size) {\n  assertSize(size)\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size)\n}\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size)\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8'\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding')\n  }\n\n  var length = byteLength(string, encoding) | 0\n  that = createBuffer(that, length)\n\n  var actual = that.write(string, encoding)\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual)\n  }\n\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0\n  that = createBuffer(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array, byteOffset, length) {\n  array.byteLength // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds')\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds')\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array)\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset)\n  } else {\n    array = new Uint8Array(array, byteOffset, length)\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array)\n  }\n  return that\n}\n\nfunction fromObject (that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0\n    that = createBuffer(that, len)\n\n    if (that.length === 0) {\n      return that\n    }\n\n    obj.copy(that, 0, 0, len)\n    return that\n  }\n\n  if (obj) {\n    if ((typeof ArrayBuffer !== 'undefined' &&\n        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0)\n      }\n      return fromArrayLike(that, obj)\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data)\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (length) {\n  if (+length != length) { // eslint-disable-line eqeqeq\n    length = 0\n  }\n  return Buffer.alloc(+length)\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i]\n      y = b[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers')\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length)\n  var pos = 0\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i]\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers')\n    }\n    buf.copy(buffer, pos)\n    pos += buf.length\n  }\n  return buffer\n}\n\nfunction byteLength (string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length\n  }\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&\n      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength\n  }\n  if (typeof string !== 'string') {\n    string = '' + string\n  }\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n  if (start === undefined || start < 0) {\n    start = 0\n  }\n  // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n  if (start > this.length) {\n    return ''\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length\n  }\n\n  if (end <= 0) {\n    return ''\n  }\n\n  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n  end >>>= 0\n  start >>>= 0\n\n  if (end <= start) {\n    return ''\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\n// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\nBuffer.prototype._isBuffer = true\n\nfunction swap (b, n, m) {\n  var i = b[n]\n  b[n] = b[m]\n  b[m] = i\n}\n\nBuffer.prototype.swap16 = function swap16 () {\n  var len = this.length\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits')\n  }\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1)\n  }\n  return this\n}\n\nBuffer.prototype.swap32 = function swap32 () {\n  var len = this.length\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits')\n  }\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3)\n    swap(this, i + 1, i + 2)\n  }\n  return this\n}\n\nBuffer.prototype.swap64 = function swap64 () {\n  var len = this.length\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits')\n  }\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7)\n    swap(this, i + 1, i + 6)\n    swap(this, i + 2, i + 5)\n    swap(this, i + 3, i + 4)\n  }\n  return this\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer')\n  }\n\n  if (start === undefined) {\n    start = 0\n  }\n  if (end === undefined) {\n    end = target ? target.length : 0\n  }\n  if (thisStart === undefined) {\n    thisStart = 0\n  }\n  if (thisEnd === undefined) {\n    thisEnd = this.length\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index')\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0\n  }\n  if (thisStart >= thisEnd) {\n    return -1\n  }\n  if (start >= end) {\n    return 1\n  }\n\n  start >>>= 0\n  end >>>= 0\n  thisStart >>>= 0\n  thisEnd >>>= 0\n\n  if (this === target) return 0\n\n  var x = thisEnd - thisStart\n  var y = end - start\n  var len = Math.min(x, y)\n\n  var thisCopy = this.slice(thisStart, thisEnd)\n  var targetCopy = target.slice(start, end)\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i]\n      y = targetCopy[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\n// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\nfunction bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1\n\n  // Normalize byteOffset\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset\n    byteOffset = 0\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000\n  }\n  byteOffset = +byteOffset  // Coerce to Number.\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : (buffer.length - 1)\n  }\n\n  // Normalize byteOffset: negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1\n    else byteOffset = buffer.length - 1\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0\n    else return -1\n  }\n\n  // Normalize val\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding)\n  }\n\n  // Finally, search either indexOf (if dir is true) or lastIndexOf\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1\n    }\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)\n  } else if (typeof val === 'number') {\n    val = val & 0xFF // Search for a byte value [0-255]\n    if (Buffer.TYPED_ARRAY_SUPPORT &&\n        typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)\n      }\n    }\n    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\nfunction arrayIndexOf (arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1\n  var arrLength = arr.length\n  var valLength = val.length\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase()\n    if (encoding === 'ucs2' || encoding === 'ucs-2' ||\n        encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1\n      }\n      indexSize = 2\n      arrLength /= 2\n      valLength /= 2\n      byteOffset /= 2\n    }\n  }\n\n  function read (buf, i) {\n    if (indexSize === 1) {\n      return buf[i]\n    } else {\n      return buf.readUInt16BE(i * indexSize)\n    }\n  }\n\n  var i\n  if (dir) {\n    var foundIndex = -1\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex\n        foundIndex = -1\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false\n          break\n        }\n      }\n      if (found) return i\n    }\n  }\n\n  return -1\n}\n\nBuffer.prototype.includes = function includes (val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)\n}\n\nBuffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) return i\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction latin1Write (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    throw new Error(\n      'Buffer.write(string, encoding, offset[, length]) is no longer supported'\n    )\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction latin1Slice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end)\n    newBuf.__proto__ = Buffer.prototype\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n  if (offset < 0) throw new RangeError('Index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    Uint8Array.prototype.set.call(\n      target,\n      this.subarray(start, start + len),\n      targetStart\n    )\n  }\n\n  return len\n}\n\n// Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\nBuffer.prototype.fill = function fill (val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start\n      start = 0\n      end = this.length\n    } else if (typeof end === 'string') {\n      encoding = end\n      end = this.length\n    }\n    if (val.length === 1) {\n      var code = val.charCodeAt(0)\n      if (code < 256) {\n        val = code\n      }\n    }\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string')\n    }\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding)\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255\n  }\n\n  // Invalid ranges are not set to a default, so can range check early.\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index')\n  }\n\n  if (end <= start) {\n    return this\n  }\n\n  start = start >>> 0\n  end = end === undefined ? this.length : end >>> 0\n\n  if (!val) val = 0\n\n  var i\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val)\n      ? val\n      : utf8ToBytes(new Buffer(val, encoding).toString())\n    var len = bytes.length\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; ++i) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n\nfunction isnan (val) {\n  return val !== val // eslint-disable-line no-self-compare\n}\n","import mod from \"-!../../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=style&index=0&id=a326889c&scoped=true&lang=css&\"; export default mod; export * from \"-!../../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=style&index=0&id=a326889c&scoped=true&lang=css&\"","var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};\n","/**\r\n * Date:2020/11/9\r\n * Desc:\r\n */\r\n/**\r\n * Date:2020/11/2\r\n * Desc: ptz cmd 封装\r\n * cmd[0] //首字节以05H开头\r\n * cmd[1] //组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码\r\n *        //  校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16\r\n * cmd[2] //地址的低8位？？？什么地址，地址范围000h ~ FFFh(0~4095),其中000h为广播地址\r\n * cmd[3] //指令码\r\n * cmd[4] //数据1,水平控制速度、聚焦速度\r\n * cmd[5] //数据2，垂直控制速度、光圈速度\r\n * cmd[6] // 高4位为数据3=变倍控制速度，低4位为地址高4位\r\n */\r\n\r\nconst PTZ_TYPE = {\r\n    stop: 'stop',\r\n    right: 'right',\r\n    left: 'left',\r\n    up: 'up',\r\n    down: 'down',\r\n    leftUp: 'leftUp',\r\n    leftDown: 'leftDown',\r\n    rightUp: 'rightUp',\r\n    rightDown: 'rightDown',\r\n    zoomFar: 'zoomFar',\r\n    zoomNear: 'zoomNear',\r\n    apertureFar: 'apertureFar',\r\n    apertureNear: 'apertureNear',\r\n    focusFar: 'focusFar',\r\n    focusNear: 'focusNear',\r\n    setPos: 'setPos',\r\n    calPos: 'calPos',\r\n    delPos: 'delPos'\r\n};\r\n\r\nconst PTZ_CMD_TYPE = {\r\n    stop: 0x00,\r\n\r\n    right: 0x01,\r\n    left: 0x02,\r\n    up: 0x08,\r\n    down: 0x04,\r\n\r\n    leftUp: 0x0A,\r\n    leftDown: 0x06,\r\n    rightUp: 0x09,\r\n    rightDown: 0x05,\r\n\r\n    zoomFar: 0x10, // 镜头 放大\r\n    zoomNear: 0x20,  // 镜头 缩小\r\n\r\n    apertureFar: 0x48, // 光圈 缩小\r\n    apertureNear: 0x44, // 光圈 放大\r\n\r\n    focusFar: 0x42, // 聚焦 近\r\n    focusNear: 0x41, // 聚焦 远\r\n\r\n    setPos: 0x81,\r\n    calPos: 0x82,\r\n    delPos: 0x83\r\n};\r\n\r\nconst SPEED_ARRAY = [0x19, 0x32, 0x4b, 0x64, 0x7d, 0x96, 0xAF, 0xC8, 0xE1, 0xFA];\r\nconst POSITION_ARRAY = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10];\r\n\r\n// 获取 direction 方向型\r\n/**\r\n *\r\n * @param options\r\n *        type:\r\n *        speed:default 5\r\n *        index:\r\n * @returns {string}\r\n */\r\nfunction getPTZCmd(options) {\r\n    const {type, speed, index} = options;\r\n    const ptzSpeed = getPTZSpeed(speed);\r\n    let indexValue3, indexValue4, indexValue5, indexValue6;\r\n    indexValue3 = PTZ_CMD_TYPE[type];\r\n    switch (type) {\r\n        case PTZ_TYPE.up:\r\n        case PTZ_TYPE.down:\r\n        case PTZ_TYPE.apertureFar:\r\n        case PTZ_TYPE.apertureNear:\r\n            indexValue5 = ptzSpeed;\r\n            break;\r\n        case PTZ_TYPE.right:\r\n        case PTZ_TYPE.left:\r\n        case PTZ_TYPE.focusFar:\r\n        case PTZ_TYPE.focusNear:\r\n            indexValue4 = ptzSpeed;\r\n            break;\r\n        case PTZ_TYPE.leftUp:\r\n        case PTZ_TYPE.leftDown:\r\n        case PTZ_TYPE.rightUp:\r\n        case PTZ_TYPE.rightDown:\r\n            indexValue4 = ptzSpeed;\r\n            indexValue5 = ptzSpeed;\r\n            break;\r\n        case PTZ_TYPE.zoomFar:\r\n        case PTZ_TYPE.zoomNear:\r\n            indexValue6 = 0x10;\r\n            break;\r\n        case PTZ_TYPE.calPos:\r\n        case PTZ_TYPE.delPos:\r\n        case PTZ_TYPE.setPos:\r\n            indexValue5 = getPTZPositionIndex(index);\r\n            break;\r\n        default:\r\n            break;\r\n    }\r\n    return ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6);\r\n}\r\n\r\nfunction getPTZSpeed(speed) {\r\n    speed = speed || 5;\r\n    const speedIndex = speed - 1;\r\n    const ptzSpeed = SPEED_ARRAY[speedIndex] || SPEED_ARRAY[4];\r\n    return ptzSpeed;\r\n}\r\n\r\nfunction getPTZPositionIndex(index) {\r\n    return POSITION_ARRAY[index - 1];\r\n}\r\n\r\nfunction ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6) {\r\n    //\r\n    let cmd = Buffer.alloc(8);\r\n    // 首字节以05H开头\r\n    cmd[0] = 0xA5;\r\n    // 组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码\r\n    cmd[1] = 0x0F;\r\n    // 校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16\r\n    cmd[2] = 0x01;\r\n    //\r\n    if (indexValue3) {\r\n        cmd[3] = indexValue3;\r\n    }\r\n    if (indexValue4) {\r\n        cmd[4] = indexValue4;\r\n    }\r\n    if (indexValue5) {\r\n        cmd[5] = indexValue5;\r\n    }\r\n    if (indexValue6) {\r\n        cmd[6] = indexValue6;\r\n    }\r\n\r\n    cmd[7] = (cmd[0] + cmd[1] + cmd[2] + cmd[3] + cmd[4] + cmd[5] + cmd[6]) % 256;\r\n\r\n    return bytes2HexString(cmd);\r\n}\r\n\r\nfunction bytes2HexString(byte) {\r\n    let hexs = \"\";\r\n    for (let i = 0; i < byte.length; i++) {\r\n        let hex = (byte[i]).toString(16);\r\n        if (hex.length === 1) {\r\n            hex = '0' + hex;\r\n        }\r\n        hexs += hex.toUpperCase();\r\n    }\r\n    return hexs;\r\n}\r\n\r\nexport {\r\n    getPTZCmd,\r\n    PTZ_TYPE\r\n}\r\n","// extracted by mini-css-extract-plugin","exports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = ((value * c) - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n","// extracted by mini-css-extract-plugin","var g;\n\n// This works in non-strict mode\ng = (function() {\n\treturn this;\n})();\n\ntry {\n\t// This works if eval is allowed (see CSP)\n\tg = g || new Function(\"return this\")();\n} catch (e) {\n\t// This works if the window reference is available\n\tif (typeof window === \"object\") g = window;\n}\n\n// g can still be undefined, but nothing to do about it...\n// We return undefined, instead of nothing here, so it's\n// easier to handle this case. if(!global) { ...}\n\nmodule.exports = g;\n","// This file is imported into lib/wc client bundles.\n\nif (typeof window !== 'undefined') {\n  var currentScript = window.document.currentScript\n  if (process.env.NEED_CURRENTSCRIPT_POLYFILL) {\n    var getCurrentScript = require('@soda/get-current-script')\n    currentScript = getCurrentScript()\n\n    // for backward compatibility, because previously we directly included the polyfill\n    if (!('currentScript' in document)) {\n      Object.defineProperty(document, 'currentScript', { get: getCurrentScript })\n    }\n  }\n\n  var src = currentScript && currentScript.src.match(/(.+\\/)[^/]+\\.js(\\?.*)?$/)\n  if (src) {\n    __webpack_public_path__ = src[1] // eslint-disable-line\n  }\n}\n\n// Indicate to webpack that this file can be concatenated\nexport default null\n","var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',[(_vm.$parent.titleTabActive === 0)?_c('div',{staticClass:\"tabpanel\"},[_c('mu-data-table',{attrs:{\"data\":_vm.Devices,\"columns\":_vm.columns},scopedSlots:_vm._u([{key:\"expand\",fn:function(prop){return [_c('mu-data-table',{attrs:{\"data\":prop.row.Channels,\"columns\":_vm.columns2},scopedSlots:_vm._u([{key:\"default\",fn:function(ref){\nvar item = ref.row;\nvar $index = ref.$index;\nreturn [_c('td',[_vm._v(_vm._s(item.DeviceID))]),_c('td',[_vm._v(_vm._s(item.Name))]),_c('td',[_vm._v(_vm._s(item.Manufacturer))]),_c('td',[_vm._v(_vm._s(item.Address))]),_c('td',[_vm._v(_vm._s(item.Status))]),_c('td',[(item.Connected)?_c('mu-button',{attrs:{\"flat\":\"\"},on:{\"click\":function($event){return _vm.ptz(prop.row.ID, $index, item)}}},[_vm._v(\"云台 \")]):_vm._e(),(item.Connected)?_c('mu-button',{attrs:{\"flat\":\"\"},on:{\"click\":function($event){return _vm.bye(prop.row.ID, $index)}}},[_vm._v(\"断开\")]):_c('mu-button',{attrs:{\"flat\":\"\"},on:{\"click\":function($event){return _vm.invite(prop.row.ID, $index, item)}}},[_vm._v(\"连接 \")])],1)]}}],null,true)})]}},{key:\"default\",fn:function(ref){\nvar item = ref.row;\nreturn [_c('td',[_vm._v(_vm._s(item.ID))]),_c('td',[_vm._v(_vm._s(item.Addr))]),_c('td',[_vm._v(_vm._s(item.Channels ? item.Channels.length : 0))]),_c('td',[_c('StartTime',{attrs:{\"value\":item.RegisterTime}})],1),_c('td',[_c('StartTime',{attrs:{\"value\":item.UpdateTime}})],1),_c('td',[_vm._v(_vm._s(item.Status))])]}}],null,false,2809573184)})],1):_vm._e(),(_vm.$parent.titleTabActive === 1)?_c('div',{staticClass:\"tabpanel\"},[_c('div',{staticClass:\"search\"},[_c('i-select',{attrs:{\"multiple\":\"\"},model:{value:(_vm.channelSelectedList),callback:function ($$v) {_vm.channelSelectedList=$$v},expression:\"channelSelectedList\"}},_vm._l((_vm.channelList),function(channel,index){return _c('Option',{key:index,attrs:{\"value\":channel,\"label\":channel.DeviceID + '(' + channel.Name + ')'}})}),1)],1),_c('div',{staticClass:\"flex-box\"},[_vm._l((_vm.channelSelectedList),function(channel,index){return [(channel.ID)?_c('div',{key:index,staticClass:\"flex-item\"},[_c('webrtc-player2',{attrs:{\"stream-path\":'gb28181/' + channel.ID}})],1):_vm._e()]})],2)]):_vm._e(),_c('webrtc-player',{ref:\"player\",attrs:{\"PublicIP\":_vm.PublicIP},on:{\"ptz\":_vm.sendPtz},model:{value:(_vm.previewStreamPath),callback:function ($$v) {_vm.previewStreamPath=$$v},expression:\"previewStreamPath\"}})],1)}\nvar staticRenderFns = []\n\nexport { render, staticRenderFns }","var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('Modal',_vm._g(_vm._b({attrs:{\"draggable\":\"\",\"width\":\"750\",\"title\":_vm.streamPath},on:{\"on-ok\":_vm.onClosePreview,\"on-cancel\":_vm.onClosePreview}},'Modal',_vm.$attrs,false),_vm.$listeners),[_c('div',{staticClass:\"container\"},[_c('video',{ref:\"webrtc\",attrs:{\"width\":\"488\",\"height\":\"275\",\"autoplay\":\"\",\"muted\":\"\",\"controls\":\"\"},domProps:{\"srcObject\":_vm.stream,\"muted\":true}}),_c('div',{staticClass:\"control\"},[_vm._l((8),function(n){return _c('svg',{class:'arrow'+n,attrs:{\"viewBox\":\"0 0 1024 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874.666667a21.333333 21.333333 0 0 1-21.333333-21.333334v-128a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333334z\"  /></svg>\r\n      </div>\r\n      <div class=\"control5\">\r\n        <i-select v-model=\"ptzPositionIndex\" style=\"width: 100px\">\r\n          <Option v-for=\"n in 10\" :value=\"n\" :key=\"n\">预置点{{n}}</Option>\r\n        </i-select>\r\n        <i-button type=\"primary\" @click=\"ptzCmd(ptzType.setPos)\">设置</i-button>\r\n        <i-button type=\"success\" @click=\"ptzCmd(ptzType.calPos)\">调用</i-button>\r\n        <i-button type=\"error\" @click=\"ptzCmd(ptzType.delPos)\">删除</i-button>\r\n        速度：\r\n        <InputNumber :max=\"10\" :min=\"1\" v-model=\"ptzSpeed\"></InputNumber>\r\n      </div>\r\n    </div>\r\n    <div slot=\"footer\">\r\n      <mu-badge v-if=\"remoteSDP\">\r\n        <a slot=\"content\" :href=\"remoteSDPURL\" download=\"remoteSDP.txt\">remoteSDP</a>\r\n      </mu-badge>\r\n      <mu-badge v-if=\"localSDP\">\r\n        <a slot=\"content\" :href=\"localSDPURL\" download=\"localSDP.txt\">localSDP</a>\r\n      </mu-badge>\r\n    </div>\r\n  </Modal>\r\n</template>\r\n<script>\r\n  import {PTZ_TYPE} from \"../utils/ptz-cmd\";\r\n  const PTZ_DIRECTION_ARRAY = [PTZ_TYPE.up,PTZ_TYPE.right,PTZ_TYPE.down,PTZ_TYPE.left,PTZ_TYPE.leftUp,PTZ_TYPE.rightUp,PTZ_TYPE.leftDown,PTZ_TYPE.rightDown];\r\n  let pc = null;\r\nexport default {\r\n  data() {\r\n    return {\r\n      iceConnectionState: pc && pc.iceConnectionState,\r\n      stream: null,\r\n      localSDP: \"\",\r\n      remoteSDP: \"\",\r\n      remoteSDPURL: \"\",\r\n      localSDPURL: \"\",\r\n      streamPath: \"\",\r\n      ptzSpeed:5,\r\n      ptzPositionIndex:1,\r\n      ptzType:PTZ_TYPE,\r\n    };\r\n  },\r\n  props:{\r\n    PublicIP:String\r\n  },\r\n    methods: {\r\n        async play(streamPath) {\r\n            pc = new RTCPeerConnection();\r\n            pc.addTransceiver('video',{\r\n              direction:'recvonly'\r\n            })\r\n            this.streamPath = streamPath;\r\n            pc.onsignalingstatechange = e => {\r\n                //console.log(e);\r\n            };\r\n            pc.oniceconnectionstatechange = e => {\r\n                this.$toast.info(pc.iceConnectionState);\r\n                this.iceConnectionState = pc.iceConnectionState;\r\n            };\r\n            pc.onicecandidate = event => {\r\n                console.log(event)\r\n            };\r\n            pc.ontrack = event => {\r\n               // console.log(event);\r\n                if (event.track.kind == \"video\")\r\n                    this.stream = event.streams[0];\r\n            };\r\n            await pc.setLocalDescription(await pc.createOffer());\r\n            this.localSDP = pc.localDescription.sdp;\r\n            this.localSDPURL = URL.createObjectURL(\r\n                new Blob([this.localSDP], { type: \"text/plain\" })\r\n            );\r\n            const result = await this.ajax({\r\n                type: \"POST\",\r\n                processData: false,\r\n                data: JSON.stringify(pc.localDescription.toJSON()),\r\n                url: \"/webrtc/play?streamPath=\" + this.streamPath,\r\n                dataType: \"json\"\r\n            });\r\n            if (result.errmsg) {\r\n                this.$toast.error(result.errmsg);\r\n                return;\r\n            } else {\r\n                this.remoteSDP = result.sdp;\r\n                this.remoteSDPURL = URL.createObjectURL(new Blob([this.remoteSDP], { type: \"text/plain\" }));\r\n            }\r\n            await pc.setRemoteDescription(new RTCSessionDescription(result));\r\n        },\r\n        ptzCmdDirection(direction){\r\n          const type = PTZ_DIRECTION_ARRAY[direction-1];\r\n          this.ptzCmd(type);\r\n        },\r\n        startPtzCmdCycle(){\r\n          this.ptzCmd(PTZ_TYPE.right,true);\r\n        },\r\n        stopPtzCmdCycle(){\r\n          this.ptzCmd(PTZ_TYPE.stop);\r\n        },\r\n        ptzCmd(type,isCycling){\r\n          this.$emit('ptz',{type:type,speed:this.ptzSpeed,index:this.ptzPositionIndex,cycle:isCycling})\r\n        },\r\n        onClosePreview() {\r\n            pc.close();\r\n        }\r\n    }\r\n};\r\n</script>\r\n<style scoped>\r\n  .arrow1{\r\n    grid-column: 2;\r\n    grid-row: 1;\r\n  }\r\n  .arrow2{\r\n    transform: rotate(90deg);\r\n    grid-column: 3;\r\n    grid-row: 2;\r\n  }\r\n  .arrow3{\r\n    transform: rotate(180deg);\r\n    grid-column: 2;\r\n    grid-row: 3;\r\n  }\r\n  .arrow4{\r\n    transform: rotate(270deg);\r\n    grid-column: 1;\r\n    grid-row: 2;\r\n  }\r\n\r\n  .arrow5{\r\n    transform: rotate(-45deg);\r\n    grid-column: 1;\r\n    grid-row: 1;\r\n  }\r\n\r\n  .arrow6{\r\n    transform: rotate(45deg);\r\n    grid-column: 3;\r\n    grid-row: 1;\r\n  }\r\n\r\n  .arrow7{\r\n    transform: rotate(-135deg);\r\n    grid-column: 1;\r\n    grid-row: 3;\r\n  }\r\n\r\n  .arrow8{\r\n    transform: rotate(135deg);\r\n    grid-column: 3;\r\n    grid-row: 3;\r\n  }\r\n\r\n  .arrow9{\r\n    grid-column: 2;\r\n    grid-row: 2;\r\n  }\r\n\r\n.container {\r\n  position: relative;\r\n  height: 350px;\r\n}\r\n.control {\r\n  position: absolute;\r\n  top: 20px;\r\n  right: 0;\r\n  display: grid;\r\n  grid-template-columns: repeat(3, 33.33%);\r\n  grid-template-rows: repeat(3, 33.33%);\r\n  width: 192px;\r\n  height: 192px;\r\n}\r\n\r\n.control2{\r\n  top: 210px;\r\n}\r\n\r\n.control3{\r\n  top: 260px;\r\n}\r\n\r\n.control4{\r\n  top: 310px;\r\n}\r\n\r\n.control5{\r\n  top: 360px;\r\n}\r\n\r\n.control >* {\r\n  cursor: pointer;\r\n  fill: gray;\r\n  width: 50px;\r\n  height: 50px;\r\n}\r\n\r\n.control5 >*{\r\n  margin-right: 10px;\r\n}\r\n\r\n.control2 >*,.control3 >*,.control4 >*{\r\n  width: 40px;\r\n  height: 40px;\r\n}\r\n\r\n.control >*:hover,.cycling{\r\n  fill: cyan\r\n}\r\n\r\n\r\n\r\n</style>\r\n","import mod from \"-!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=script&lang=js&\"","/* globals __VUE_SSR_CONTEXT__ */\n\n// IMPORTANT: Do NOT use ES2015 features in this file (except for modules).\n// This module is a runtime utility for cleaner component module output and will\n// be included in the final webpack user bundle.\n\nexport default function normalizeComponent (\n  scriptExports,\n  render,\n  staticRenderFns,\n  functionalTemplate,\n  injectStyles,\n  scopeId,\n  moduleIdentifier, /* server only */\n  shadowMode /* vue-cli only */\n) {\n  // Vue.extend constructor export interop\n  var options = typeof scriptExports === 'function'\n    ? scriptExports.options\n    : scriptExports\n\n  // render functions\n  if (render) {\n    options.render = render\n    options.staticRenderFns = staticRenderFns\n    options._compiled = true\n  }\n\n  // functional template\n  if (functionalTemplate) {\n    options.functional = true\n  }\n\n  // scopedId\n  if (scopeId) {\n    options._scopeId = 'data-v-' + scopeId\n  }\n\n  var hook\n  if (moduleIdentifier) { // server build\n    hook = function (context) {\n      // 2.3 injection\n      context =\n        context || // cached call\n        (this.$vnode && this.$vnode.ssrContext) || // stateful\n        (this.parent && this.parent.$vnode && this.parent.$vnode.ssrContext) // functional\n      // 2.2 with runInNewContext: true\n      if (!context && typeof __VUE_SSR_CONTEXT__ !== 'undefined') {\n        context = __VUE_SSR_CONTEXT__\n      }\n      // inject component styles\n      if (injectStyles) {\n        injectStyles.call(this, context)\n      }\n      // register component module identifier for async chunk inferrence\n      if (context && context._registeredComponents) {\n        context._registeredComponents.add(moduleIdentifier)\n      }\n    }\n    // used by ssr in case component is cached and beforeCreate\n    // never gets called\n    options._ssrRegister = hook\n  } else if (injectStyles) {\n    hook = shadowMode\n      ? function () {\n        injectStyles.call(\n          this,\n          (options.functional ? this.parent : this).$root.$options.shadowRoot\n        )\n      }\n      : injectStyles\n  }\n\n  if (hook) {\n    if (options.functional) {\n      // for template-only hot-reload because in that case the render fn doesn't\n      // go through the normalizer\n      options._injectStyles = hook\n      // register for functional component in vue file\n      var originalRender = options.render\n      options.render = function renderWithStyleInjection (h, context) {\n        hook.call(context)\n        return originalRender(h, context)\n      }\n    } else {\n      // inject component registration as beforeCreate hook\n      var existing = options.beforeCreate\n      options.beforeCreate = existing\n        ? [].concat(existing, hook)\n        : [hook]\n    }\n  }\n\n  return {\n    exports: scriptExports,\n    options: options\n  }\n}\n","import { render, staticRenderFns } from \"./Player.vue?vue&type=template&id=a6774e8e&scoped=true&\"\nimport script from \"./Player.vue?vue&type=script&lang=js&\"\nexport * from \"./Player.vue?vue&type=script&lang=js&\"\nimport style0 from \"./Player.vue?vue&type=style&index=0&id=a6774e8e&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"a6774e8e\",\n  null\n  \n)\n\nexport default component.exports","var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',{staticClass:\"player-wrap\"},[(_vm.rtcStream)?[_c('video',{attrs:{\"autoplay\":\"\",\"muted\":\"\",\"controls\":\"\"},domProps:{\"srcObject\":_vm.rtcStream,\"muted\":true}})]:_vm._e()],2)}\nvar staticRenderFns = []\n\nexport { render, staticRenderFns }","<template>\r\n    <div class=\"player-wrap\">\r\n        <template v-if=\"rtcStream\">\r\n            <video :srcObject.prop=\"rtcStream\" autoplay muted controls></video>\r\n        </template>\r\n    </div>\r\n</template>\r\n\r\n<script>\r\n    export default {\r\n        name: \"WebrtcPlayer\",\r\n        rtcPeerConnection: null,\r\n        data() {\r\n            return {\r\n                iceConnectionState: '',\r\n                rtcPeerConnectionInit: false,\r\n                rtcStream: null\r\n            }\r\n        },\r\n        props: {\r\n            streamPath: {\r\n                type: String,\r\n                default: ''\r\n            }\r\n        },\r\n        async created() {\r\n            await this.initRtcPeerConnection();\r\n            console.log('initRtcPeerConnectioned');\r\n            if (this.streamPath) {\r\n                await this.play(this.streamPath);\r\n                console.log('played');\r\n            }\r\n        },\r\n        methods: {\r\n            async initRtcPeerConnection() {\r\n                const rtcPeerConnection = new RTCPeerConnection();\r\n\r\n                rtcPeerConnection.addTransceiver('video', {\r\n                    direction: \"recvonly\"\r\n                });\r\n\r\n                rtcPeerConnection.onsignalingstatechange = e => {\r\n                    console.log('onsignalingstatechange', e);\r\n                };\r\n\r\n                rtcPeerConnection.oniceconnectionstatechange = e => {\r\n                    console.log('oniceconnectionstatechange', rtcPeerConnection.iceConnectionState);\r\n                };\r\n\r\n                rtcPeerConnection.onicecandidate = event => {\r\n                    console.log('onicecandidate', event);\r\n                };\r\n\r\n                rtcPeerConnection.ontrack = event => {\r\n                    console.log('ontrack', event);\r\n                    if (event.track.kind === \"video\") {\r\n                        this.rtcStream = event.streams[0];\r\n                    }\r\n                };\r\n\r\n                const rtcSessionDescriptionInit = await rtcPeerConnection.createOffer();\r\n                await rtcPeerConnection.setLocalDescription(rtcSessionDescriptionInit);\r\n                this.rtcPeerConnectionInit = true;\r\n                this.$options.rtcPeerConnection = rtcPeerConnection;\r\n            },\r\n\r\n            //\r\n            async play(streamPath) {\r\n                const rtcPeerConnection = this.$options.rtcPeerConnection;\r\n                const localDescriptionData = rtcPeerConnection.localDescription.toJSON();\r\n                const result = await this.ajax({\r\n                    type: \"POST\",\r\n                    processData: false,\r\n                    data: localDescriptionData,\r\n                    url: \"/webrtc/play?streamPath=\" + streamPath,\r\n                    dataType: \"json\"\r\n                });\r\n                if (result.error) {\r\n                    return;\r\n                }\r\n                //\r\n                rtcPeerConnection.setRemoteDescription(new RTCSessionDescription({\r\n                    type: result.type,\r\n                    sdp: result.sdp\r\n                }));\r\n            },\r\n            close() {\r\n                const rtcPeerConnection = this.$options.rtcPeerConnection;\r\n                rtcPeerConnection && rtcPeerConnection.close();\r\n            }\r\n        },\r\n        destroyed() {\r\n            this.close();\r\n        }\r\n    }\r\n</script>\r\n\r\n<style scoped>\r\n    .player-wrap {\r\n        width: 100%;\r\n        height: 100%;\r\n    }\r\n\r\n    .player-wrap video {\r\n        width: 100%;\r\n        height: 100%;\r\n    }\r\n</style>\r\n","import mod from \"-!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=script&lang=js&\"","import { render, staticRenderFns } from \"./Player2.vue?vue&type=template&id=a326889c&scoped=true&\"\nimport script from \"./Player2.vue?vue&type=script&lang=js&\"\nexport * from \"./Player2.vue?vue&type=script&lang=js&\"\nimport style0 from \"./Player2.vue?vue&type=style&index=0&id=a326889c&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"a326889c\",\n  null\n  \n)\n\nexport default component.exports","<template>\r\n    <div>\r\n        <div class=\"tabpanel\" v-if=\"$parent.titleTabActive === 0\">\r\n            <mu-data-table :data=\"Devices\" :columns=\"columns\">\r\n                <template #expand=\"prop\">\r\n                    <mu-data-table\r\n                        :data=\"prop.row.Channels\"\r\n                        :columns=\"columns2\"\r\n                    >\r\n                        <template #default=\"{ row: item, $index }\">\r\n                            <td>{{ item.DeviceID }}</td>\r\n                            <td>{{ item.Name }}</td>\r\n                            <td>{{ item.Manufacturer }}</td>\r\n                            <td>{{ item.Address }}</td>\r\n                            <td>{{ item.Status }}</td>\r\n                            <td>\r\n                                <mu-button\r\n                                    flat\r\n                                    v-if=\"item.Connected\"\r\n                                    @click=\"ptz(prop.row.ID, $index, item)\"\r\n                                    >云台\r\n                                </mu-button>\r\n                                <mu-button\r\n                                    flat\r\n                                    v-if=\"item.Connected\"\r\n                                    @click=\"bye(prop.row.ID, $index)\"\r\n                                    >断开</mu-button\r\n                                >\r\n                                <mu-button\r\n                                    v-else\r\n                                    flat\r\n                                    @click=\"invite(prop.row.ID, $index, item)\"\r\n                                    >连接\r\n                                </mu-button>\r\n                            </td>\r\n                        </template>\r\n                    </mu-data-table>\r\n                </template>\r\n                <template #default=\"{ row: item }\">\r\n                    <td>{{ item.ID }}</td>\r\n                    <td>{{ item.Addr }}</td>\r\n                    <td>{{ item.Channels ? item.Channels.length : 0 }}</td>\r\n                    <td>\r\n                        <StartTime :value=\"item.RegisterTime\"></StartTime>\r\n                    </td>\r\n                    <td>\r\n                        <StartTime :value=\"item.UpdateTime\"></StartTime>\r\n                    </td>\r\n                    <td>{{ item.Status }}</td>\r\n                </template>\r\n            </mu-data-table>\r\n        </div>\r\n        <div class=\"tabpanel\" v-if=\"$parent.titleTabActive === 1\">\r\n            <div class=\"search\">\r\n                <i-select v-model=\"channelSelectedList\" multiple>\r\n                    <Option\r\n                        v-for=\"(channel, index) in channelList\"\r\n                        :value=\"channel\"\r\n                        :label=\"channel.DeviceID + '(' + channel.Name + ')'\"\r\n                        :key=\"index\"\r\n                    >\r\n                    </Option>\r\n                </i-select>\r\n            </div>\r\n            <div class=\"flex-box\">\r\n                <template v-for=\"(channel, index) in channelSelectedList\">\r\n                    <div class=\"flex-item\" :key=\"index\" v-if=\"channel.ID\">\r\n                        <webrtc-player2\r\n                            :stream-path=\"'gb28181/' + channel.ID\"\r\n                        ></webrtc-player2>\r\n                    </div>\r\n                </template>\r\n            </div>\r\n        </div>\r\n        <webrtc-player\r\n            ref=\"player\"\r\n            @ptz=\"sendPtz\"\r\n            v-model=\"previewStreamPath\"\r\n            :PublicIP=\"PublicIP\"\r\n        ></webrtc-player>\r\n    </div>\r\n</template>\r\n<script>\r\nimport WebrtcPlayer from \"./components/Player\";\r\nimport WebrtcPlayer2 from \"./components/Player2\";\r\nimport { getPTZCmd, PTZ_TYPE } from \"./utils/ptz-cmd\";\r\n\r\nexport default {\r\n    components: {\r\n        WebrtcPlayer,\r\n        WebrtcPlayer2,\r\n    },\r\n    props: {\r\n        ListenAddr: String,\r\n    },\r\n    computed: {\r\n        PublicIP() {\r\n            return this.ListenAddr.split(\":\")[0];\r\n        },\r\n    },\r\n    data() {\r\n        return {\r\n            Devices: [],\r\n            previewStreamPath: false,\r\n            channelList: [],\r\n            channelSelectedList: [],\r\n            context: {\r\n                id: null,\r\n                channel: 0,\r\n                item: null,\r\n            },\r\n            columns: Object.freeze(\r\n                [\r\n                    \"设备号\",\r\n                    \"地址\",\r\n                    \"通道数\",\r\n                    \"注册时间\",\r\n                    \"更新时间\",\r\n                    \"状态\",\r\n                ].map((title) => ({\r\n                    title,\r\n                }))\r\n            ),\r\n            columns2: Object.freeze([\r\n                \"通道编号\",\r\n                \"名称\",\r\n                \"厂商\",\r\n                \"地址\",\r\n                \"状态\",\r\n                \"操作\",\r\n            ]).map((title) => ({ title })),\r\n        };\r\n    },\r\n    created() {\r\n        this.fetchlist();\r\n    },\r\n    mounted() {\r\n        this.$parent.titleTabs = [\"列表\", \"N路播放\"];\r\n    },\r\n    methods: {\r\n        fetchlist() {\r\n            const listES = new EventSource(this.apiHost + \"/gb28181/list\");\r\n            listES.onmessage = (evt) => {\r\n                if (!evt.data) return;\r\n                this.Devices = JSON.parse(evt.data) || [];\r\n                this.Devices.sort((a, b) => (a.ID > b.ID ? 1 : -1));\r\n                let channelList = [];\r\n                this.Devices.forEach((device) => {\r\n                    const channels = device.Channels || [];\r\n                    if (channels.length > 0) {\r\n                        channelList = channelList.concat(channels);\r\n                    }\r\n                });\r\n                if (channelList.length > 0) {\r\n                    this.channelList = channelList;\r\n                }\r\n            };\r\n            this.$once(\"hook:destroyed\", () => listES.close());\r\n        },\r\n        ptz(id, channel, item) {\r\n            this.context = {\r\n                id,\r\n                channel,\r\n                item,\r\n            };\r\n            this.previewStreamPath = true;\r\n            this.$nextTick(() =>\r\n                this.$refs.player.play(\"gb28181/\" + item.DeviceID)\r\n            );\r\n        },\r\n        sendPtz(options) {\r\n            const ptzCmd = getPTZCmd(options);\r\n            const ptzCmdStop = getPTZCmd({ type: PTZ_TYPE.stop });\r\n            this.ajax\r\n                .get(\"/gb28181/control\", {\r\n                    id: this.context.id,\r\n                    channel: this.context.channel,\r\n                    ptzcmd: ptzCmd,\r\n                })\r\n                .then((x) => {\r\n                    if (\r\n                        options.type === PTZ_TYPE.stop ||\r\n                        options.cycle === true\r\n                    ) {\r\n                        return;\r\n                    }\r\n                    setTimeout(() => {\r\n                        this.ajax.get(\"/gb28181/control\", {\r\n                            id: this.context.id,\r\n                            channel: this.context.channel,\r\n                            ptzcmd: ptzCmdStop,\r\n                        });\r\n                    }, 500);\r\n                });\r\n        },\r\n        invite(id, channel, item) {\r\n            this.ajax.get(\"/gb28181/invite\", { id, channel }).then((x) => {\r\n                item.Connected = true;\r\n            });\r\n        },\r\n        bye(id, channel, item) {\r\n            this.ajax.get(\"/gb28181/bye\", { id, channel }).then((x) => {\r\n                item.Connected = false;\r\n            });\r\n        },\r\n    },\r\n};\r\n</script>\r\n<style scoped>\r\n.flex-box {\r\n    display: flex;\r\n    flex-flow: row wrap;\r\n    align-content: flex-start;\r\n}\r\n\r\n.flex-item {\r\n    flex: 0 0 33.3333%;\r\n    height: 275px;\r\n    padding: 10px;\r\n}\r\n</style>\r\n","import mod from \"-!../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=script&lang=js&\"","import { render, staticRenderFns } from \"./App.vue?vue&type=template&id=7bad0327&scoped=true&\"\nimport script from \"./App.vue?vue&type=script&lang=js&\"\nexport * from \"./App.vue?vue&type=script&lang=js&\"\nimport style0 from \"./App.vue?vue&type=style&index=0&id=7bad0327&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"7bad0327\",\n  null\n  \n)\n\nexport default component.exports","import './setPublicPath'\nimport mod from '~entry'\nexport default mod\nexport * from '~entry'\n","// extracted by mini-css-extract-plugin","// addapted from the document.currentScript polyfill by Adam Miller\n// MIT license\n// source: https://github.com/amiller-gh/currentScript-polyfill\n\n// added support for Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=1620505\n\n(function (root, factory) {\n  if (typeof define === 'function' && define.amd) {\n    define([], factory);\n  } else if (typeof module === 'object' && module.exports) {\n    module.exports = factory();\n  } else {\n    root.getCurrentScript = factory();\n  }\n}(typeof self !== 'undefined' ? self : this, function () {\n  function getCurrentScript () {\n    if (document.currentScript) {\n      return document.currentScript\n    }\n  \n    // IE 8-10 support script readyState\n    // IE 11+ & Firefox support stack trace\n    try {\n      throw new Error();\n    }\n    catch (err) {\n      // Find the second match for the \"at\" string to get file src url from stack.\n      var ieStackRegExp = /.*at [^(]*\\((.*):(.+):(.+)\\)$/ig,\n        ffStackRegExp = /@([^@]*):(\\d+):(\\d+)\\s*$/ig,\n        stackDetails = ieStackRegExp.exec(err.stack) || ffStackRegExp.exec(err.stack),\n        scriptLocation = (stackDetails && stackDetails[1]) || false,\n        line = (stackDetails && stackDetails[2]) || false,\n        currentLocation = document.location.href.replace(document.location.hash, ''),\n        pageSource,\n        inlineScriptSourceRegExp,\n        inlineScriptSource,\n        scripts = document.getElementsByTagName('script'); // Live NodeList collection\n  \n      if (scriptLocation === currentLocation) {\n        pageSource = document.documentElement.outerHTML;\n        inlineScriptSourceRegExp = new RegExp('(?:[^\\\\n]+?\\\\n){0,' + (line - 2) + '}[^<]*<script>([\\\\d\\\\D]*?)<\\\\/script>[\\\\d\\\\D]*', 'i');\n        inlineScriptSource = pageSource.replace(inlineScriptSourceRegExp, '$1').trim();\n      }\n  \n      for (var i = 0; i < scripts.length; i++) {\n        // If ready state is interactive, return the script tag\n        if (scripts[i].readyState === 'interactive') {\n          return scripts[i];\n        }\n  \n        // If src matches, return the script tag\n        if (scripts[i].src === scriptLocation) {\n          return scripts[i];\n        }\n  \n        // If inline source matches, return the script tag\n        if (\n          scriptLocation === currentLocation &&\n          scripts[i].innerHTML &&\n          scripts[i].innerHTML.trim() === inlineScriptSource\n        ) {\n          return scripts[i];\n        }\n      }\n  \n      // If no match, return null\n      return null;\n    }\n  };\n\n  return getCurrentScript\n}));\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/ui/dist/plugin-gb28181.css b/ui/dist/plugin-gb28181.css
index 2bf84cf..eb8f196 100644
--- a/ui/dist/plugin-gb28181.css
+++ b/ui/dist/plugin-gb28181.css
@@ -1 +1 @@
-.arrow1[data-v-76558468]{grid-column:2;grid-row:1}.arrow2[data-v-76558468]{transform:rotate(90deg);grid-column:3;grid-row:2}.arrow3[data-v-76558468]{transform:rotate(180deg);grid-column:2;grid-row:3}.arrow4[data-v-76558468]{transform:rotate(270deg);grid-column:1;grid-row:2}.arrow5[data-v-76558468]{transform:rotate(-45deg);grid-column:1;grid-row:1}.arrow6[data-v-76558468]{transform:rotate(45deg);grid-column:3;grid-row:1}.arrow7[data-v-76558468]{transform:rotate(-135deg);grid-column:1;grid-row:3}.arrow8[data-v-76558468]{transform:rotate(135deg);grid-column:3;grid-row:3}.arrow9[data-v-76558468]{grid-column:2;grid-row:2}.container[data-v-76558468]{position:relative;height:350px}.control[data-v-76558468]{position:absolute;top:20px;right:0;display:grid;grid-template-columns:repeat(3,33.33%);grid-template-rows:repeat(3,33.33%);width:192px;height:192px}.control2[data-v-76558468]{top:210px}.control3[data-v-76558468]{top:260px}.control4[data-v-76558468]{top:310px}.control5[data-v-76558468]{top:360px}.control>[data-v-76558468]{cursor:pointer;fill:grey;width:50px;height:50px}.control5>[data-v-76558468]{margin-right:10px}.control2>[data-v-76558468],.control3>[data-v-76558468],.control4>[data-v-76558468]{width:40px;height:40px}.control>[data-v-76558468]:hover,.cycling[data-v-76558468]{fill:#0ff}.player-wrap[data-v-379ce7fe],.player-wrap video[data-v-379ce7fe]{width:100%;height:100%}.flex-box[data-v-77f8f0e9]{display:flex;flex-flow:row wrap;align-content:flex-start}.flex-item[data-v-77f8f0e9]{flex:0 0 33.3333%;height:275px;padding:10px}
\ No newline at end of file
+.arrow1[data-v-a6774e8e]{grid-column:2;grid-row:1}.arrow2[data-v-a6774e8e]{transform:rotate(90deg);grid-column:3;grid-row:2}.arrow3[data-v-a6774e8e]{transform:rotate(180deg);grid-column:2;grid-row:3}.arrow4[data-v-a6774e8e]{transform:rotate(270deg);grid-column:1;grid-row:2}.arrow5[data-v-a6774e8e]{transform:rotate(-45deg);grid-column:1;grid-row:1}.arrow6[data-v-a6774e8e]{transform:rotate(45deg);grid-column:3;grid-row:1}.arrow7[data-v-a6774e8e]{transform:rotate(-135deg);grid-column:1;grid-row:3}.arrow8[data-v-a6774e8e]{transform:rotate(135deg);grid-column:3;grid-row:3}.arrow9[data-v-a6774e8e]{grid-column:2;grid-row:2}.container[data-v-a6774e8e]{position:relative;height:350px}.control[data-v-a6774e8e]{position:absolute;top:20px;right:0;display:grid;grid-template-columns:repeat(3,33.33%);grid-template-rows:repeat(3,33.33%);width:192px;height:192px}.control2[data-v-a6774e8e]{top:210px}.control3[data-v-a6774e8e]{top:260px}.control4[data-v-a6774e8e]{top:310px}.control5[data-v-a6774e8e]{top:360px}.control>[data-v-a6774e8e]{cursor:pointer;fill:grey;width:50px;height:50px}.control5>[data-v-a6774e8e]{margin-right:10px}.control2>[data-v-a6774e8e],.control3>[data-v-a6774e8e],.control4>[data-v-a6774e8e]{width:40px;height:40px}.control>[data-v-a6774e8e]:hover,.cycling[data-v-a6774e8e]{fill:#0ff}.player-wrap[data-v-a326889c],.player-wrap video[data-v-a326889c]{width:100%;height:100%}.flex-box[data-v-7bad0327]{display:flex;flex-flow:row wrap;align-content:flex-start}.flex-item[data-v-7bad0327]{flex:0 0 33.3333%;height:275px;padding:10px}
\ No newline at end of file
diff --git a/ui/dist/plugin-gb28181.umd.js b/ui/dist/plugin-gb28181.umd.js
index 247ab66..99a3f5d 100644
--- a/ui/dist/plugin-gb28181.umd.js
+++ b/ui/dist/plugin-gb28181.umd.js
@@ -91,23 +91,12 @@ return /******/ (function(modules) { // webpackBootstrap
 /******/
 /******/
 /******/ 	// Load entry module and return exports
-/******/ 	return __webpack_require__(__webpack_require__.s = "fb15");
+/******/ 	return __webpack_require__(__webpack_require__.s = "deee");
 /******/ })
 /************************************************************************/
 /******/ ({
 
-/***/ "040c":
-/***/ (function(module, __webpack_exports__, __webpack_require__) {
-
-"use strict";
-/* harmony import */ var _node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_76558468_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("d989");
-/* harmony import */ var _node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_76558468_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_76558468_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__);
-/* unused harmony reexport * */
-
-
-/***/ }),
-
-/***/ "1fb5":
+/***/ "0c57":
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -267,951 +256,598 @@ function fromByteArray (uint8) {
 
 /***/ }),
 
-/***/ "2d55":
-/***/ (function(module, exports, __webpack_require__) {
+/***/ "0cd2":
+/***/ (function(module, __webpack_exports__, __webpack_require__) {
 
-// extracted by mini-css-extract-plugin
+"use strict";
+/* harmony import */ var _plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_7bad0327_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("df72");
+/* harmony import */ var _plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_7bad0327_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_7bad0327_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__);
+/* unused harmony reexport * */
+ /* unused harmony default export */ var _unused_webpack_default_export = (_plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_7bad0327_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default.a); 
 
 /***/ }),
 
-/***/ "4296":
+/***/ "2d15":
 /***/ (function(module, __webpack_exports__, __webpack_require__) {
 
 "use strict";
-/* harmony import */ var _node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_77f8f0e9_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("dc29");
-/* harmony import */ var _node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_77f8f0e9_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_App_vue_vue_type_style_index_0_id_77f8f0e9_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__);
+/* harmony import */ var _plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_a6774e8e_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("9e83");
+/* harmony import */ var _plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_a6774e8e_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_a6774e8e_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__);
 /* unused harmony reexport * */
-
+ /* unused harmony default export */ var _unused_webpack_default_export = (_plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player_vue_vue_type_style_index_0_id_a6774e8e_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default.a); 
 
 /***/ }),
 
-/***/ "8875":
+/***/ "32dd":
 /***/ (function(module, exports, __webpack_require__) {
 
-var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_DEFINE_RESULT__;// addapted from the document.currentScript polyfill by Adam Miller
-// MIT license
-// source: https://github.com/amiller-gh/currentScript-polyfill
-
-// added support for Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=1620505
-
-(function (root, factory) {
-  if (true) {
-    !(__WEBPACK_AMD_DEFINE_ARRAY__ = [], __WEBPACK_AMD_DEFINE_FACTORY__ = (factory),
-				__WEBPACK_AMD_DEFINE_RESULT__ = (typeof __WEBPACK_AMD_DEFINE_FACTORY__ === 'function' ?
-				(__WEBPACK_AMD_DEFINE_FACTORY__.apply(exports, __WEBPACK_AMD_DEFINE_ARRAY__)) : __WEBPACK_AMD_DEFINE_FACTORY__),
-				__WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
-  } else {}
-}(typeof self !== 'undefined' ? self : this, function () {
-  function getCurrentScript () {
-    var descriptor = Object.getOwnPropertyDescriptor(document, 'currentScript')
-    // for chrome
-    if (!descriptor && 'currentScript' in document && document.currentScript) {
-      return document.currentScript
-    }
-
-    // for other browsers with native support for currentScript
-    if (descriptor && descriptor.get !== getCurrentScript && document.currentScript) {
-      return document.currentScript
-    }
-  
-    // IE 8-10 support script readyState
-    // IE 11+ & Firefox support stack trace
-    try {
-      throw new Error();
-    }
-    catch (err) {
-      // Find the second match for the "at" string to get file src url from stack.
-      var ieStackRegExp = /.*at [^(]*\((.*):(.+):(.+)\)$/ig,
-        ffStackRegExp = /@([^@]*):(\d+):(\d+)\s*$/ig,
-        stackDetails = ieStackRegExp.exec(err.stack) || ffStackRegExp.exec(err.stack),
-        scriptLocation = (stackDetails && stackDetails[1]) || false,
-        line = (stackDetails && stackDetails[2]) || false,
-        currentLocation = document.location.href.replace(document.location.hash, ''),
-        pageSource,
-        inlineScriptSourceRegExp,
-        inlineScriptSource,
-        scripts = document.getElementsByTagName('script'); // Live NodeList collection
-  
-      if (scriptLocation === currentLocation) {
-        pageSource = document.documentElement.outerHTML;
-        inlineScriptSourceRegExp = new RegExp('(?:[^\\n]+?\\n){0,' + (line - 2) + '}[^<]*<script>([\\d\\D]*?)<\\/script>[\\d\\D]*', 'i');
-        inlineScriptSource = pageSource.replace(inlineScriptSourceRegExp, '$1').trim();
-      }
-  
-      for (var i = 0; i < scripts.length; i++) {
-        // If ready state is interactive, return the script tag
-        if (scripts[i].readyState === 'interactive') {
-          return scripts[i];
-        }
-  
-        // If src matches, return the script tag
-        if (scripts[i].src === scriptLocation) {
-          return scripts[i];
-        }
-  
-        // If inline source matches, return the script tag
-        if (
-          scriptLocation === currentLocation &&
-          scripts[i].innerHTML &&
-          scripts[i].innerHTML.trim() === inlineScriptSource
-        ) {
-          return scripts[i];
-        }
-      }
-  
-      // If no match, return null
-      return null;
-    }
-  };
+"use strict";
+/* WEBPACK VAR INJECTION */(function(global) {/*!
+ * The buffer module from node.js, for the browser.
+ *
+ * @author   Feross Aboukhadijeh <http://feross.org>
+ * @license  MIT
+ */
+/* eslint-disable no-proto */
 
-  return getCurrentScript
-}));
 
 
-/***/ }),
+var base64 = __webpack_require__("0c57")
+var ieee754 = __webpack_require__("99fc")
+var isArray = __webpack_require__("5f9f")
 
-/***/ "88a2":
-/***/ (function(module, __webpack_exports__, __webpack_require__) {
+exports.Buffer = Buffer
+exports.SlowBuffer = SlowBuffer
+exports.INSPECT_MAX_BYTES = 50
 
-"use strict";
-/* WEBPACK VAR INJECTION */(function(Buffer) {/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "b", function() { return getPTZCmd; });
-/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() { return PTZ_TYPE; });
 /**
- * Date:2020/11/9
- * Desc:
+ * If `Buffer.TYPED_ARRAY_SUPPORT`:
+ *   === true    Use Uint8Array implementation (fastest)
+ *   === false   Use Object implementation (most compatible, even IE6)
+ *
+ * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
+ * Opera 11.6+, iOS 4.2+.
+ *
+ * Due to various browser bugs, sometimes the Object implementation will be used even
+ * when the browser supports typed arrays.
+ *
+ * Note:
+ *
+ *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
+ *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
+ *
+ *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
+ *
+ *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
+ *     incorrect length in some situations.
+
+ * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
+ * get the Object implementation, which is slower but behaves correctly.
  */
-/**
- * Date:2020/11/2
- * Desc: ptz cmd 封装
- * cmd[0] //首字节以05H开头
- * cmd[1] //组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码
- *        //  校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16
- * cmd[2] //地址的低8位？？？什么地址，地址范围000h ~ FFFh(0~4095),其中000h为广播地址
- * cmd[3] //指令码
- * cmd[4] //数据1,水平控制速度、聚焦速度
- * cmd[5] //数据2，垂直控制速度、光圈速度
- * cmd[6] // 高4位为数据3=变倍控制速度，低4位为地址高4位
+Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
+  ? global.TYPED_ARRAY_SUPPORT
+  : typedArraySupport()
+
+/*
+ * Export kMaxLength after typed array support is determined.
  */
+exports.kMaxLength = kMaxLength()
 
-const PTZ_TYPE = {
-    stop: 'stop',
-    right: 'right',
-    left: 'left',
-    up: 'up',
-    down: 'down',
-    leftUp: 'leftUp',
-    leftDown: 'leftDown',
-    rightUp: 'rightUp',
-    rightDown: 'rightDown',
-    zoomFar: 'zoomFar',
-    zoomNear: 'zoomNear',
-    apertureFar: 'apertureFar',
-    apertureNear: 'apertureNear',
-    focusFar: 'focusFar',
-    focusNear: 'focusNear',
-    setPos: 'setPos',
-    calPos: 'calPos',
-    delPos: 'delPos'
-};
+function typedArraySupport () {
+  try {
+    var arr = new Uint8Array(1)
+    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}
+    return arr.foo() === 42 && // typed array instances can be augmented
+        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
+        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
+  } catch (e) {
+    return false
+  }
+}
 
-const PTZ_CMD_TYPE = {
-    stop: 0x00,
+function kMaxLength () {
+  return Buffer.TYPED_ARRAY_SUPPORT
+    ? 0x7fffffff
+    : 0x3fffffff
+}
 
-    right: 0x01,
-    left: 0x02,
-    up: 0x08,
-    down: 0x04,
+function createBuffer (that, length) {
+  if (kMaxLength() < length) {
+    throw new RangeError('Invalid typed array length')
+  }
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    // Return an augmented `Uint8Array` instance, for best performance
+    that = new Uint8Array(length)
+    that.__proto__ = Buffer.prototype
+  } else {
+    // Fallback: Return an object instance of the Buffer class
+    if (that === null) {
+      that = new Buffer(length)
+    }
+    that.length = length
+  }
 
-    leftUp: 0x0A,
-    leftDown: 0x06,
-    rightUp: 0x09,
-    rightDown: 0x05,
+  return that
+}
 
-    zoomFar: 0x10, // 镜头 放大
-    zoomNear: 0x20,  // 镜头 缩小
+/**
+ * The Buffer constructor returns instances of `Uint8Array` that have their
+ * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
+ * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
+ * and the `Uint8Array` methods. Square bracket notation works as expected -- it
+ * returns a single octet.
+ *
+ * The `Uint8Array` prototype remains unmodified.
+ */
 
-    apertureFar: 0x48, // 光圈 缩小
-    apertureNear: 0x44, // 光圈 放大
+function Buffer (arg, encodingOrOffset, length) {
+  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {
+    return new Buffer(arg, encodingOrOffset, length)
+  }
 
-    focusFar: 0x42, // 聚焦 近
-    focusNear: 0x41, // 聚焦 远
+  // Common case.
+  if (typeof arg === 'number') {
+    if (typeof encodingOrOffset === 'string') {
+      throw new Error(
+        'If encoding is specified then the first argument must be a string'
+      )
+    }
+    return allocUnsafe(this, arg)
+  }
+  return from(this, arg, encodingOrOffset, length)
+}
 
-    setPos: 0x81,
-    calPos: 0x82,
-    delPos: 0x83
-};
+Buffer.poolSize = 8192 // not used by this implementation
 
-const SPEED_ARRAY = [0x19, 0x32, 0x4b, 0x64, 0x7d, 0x96, 0xAF, 0xC8, 0xE1, 0xFA];
-const POSITION_ARRAY = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10];
+// TODO: Legacy, not needed anymore. Remove in next major version.
+Buffer._augment = function (arr) {
+  arr.__proto__ = Buffer.prototype
+  return arr
+}
 
-// 获取 direction 方向型
-/**
- *
- * @param options
- *        type:
- *        speed:default 5
- *        index:
- * @returns {string}
- */
-function getPTZCmd(options) {
-    const {type, speed, index} = options;
-    const ptzSpeed = getPTZSpeed(speed);
-    let indexValue3, indexValue4, indexValue5, indexValue6;
-    indexValue3 = PTZ_CMD_TYPE[type];
-    switch (type) {
-        case PTZ_TYPE.up:
-        case PTZ_TYPE.down:
-        case PTZ_TYPE.apertureFar:
-        case PTZ_TYPE.apertureNear:
-            indexValue5 = ptzSpeed;
-            break;
-        case PTZ_TYPE.right:
-        case PTZ_TYPE.left:
-        case PTZ_TYPE.focusFar:
-        case PTZ_TYPE.focusNear:
-            indexValue4 = ptzSpeed;
-            break;
-        case PTZ_TYPE.leftUp:
-        case PTZ_TYPE.leftDown:
-        case PTZ_TYPE.rightUp:
-        case PTZ_TYPE.rightDown:
-            indexValue4 = ptzSpeed;
-            indexValue5 = ptzSpeed;
-            break;
-        case PTZ_TYPE.zoomFar:
-        case PTZ_TYPE.zoomNear:
-            indexValue6 = 0x10;
-            break;
-        case PTZ_TYPE.calPos:
-        case PTZ_TYPE.delPos:
-        case PTZ_TYPE.setPos:
-            indexValue5 = getPTZPositionIndex(index);
-            break;
-        default:
-            break;
-    }
-    return ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6);
+function from (that, value, encodingOrOffset, length) {
+  if (typeof value === 'number') {
+    throw new TypeError('"value" argument must not be a number')
+  }
+
+  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {
+    return fromArrayBuffer(that, value, encodingOrOffset, length)
+  }
+
+  if (typeof value === 'string') {
+    return fromString(that, value, encodingOrOffset)
+  }
+
+  return fromObject(that, value)
 }
 
-function getPTZSpeed(speed) {
-    speed = speed || 5;
-    const speedIndex = speed - 1;
-    const ptzSpeed = SPEED_ARRAY[speedIndex] || SPEED_ARRAY[4];
-    return ptzSpeed;
+/**
+ * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
+ * if value is a number.
+ * Buffer.from(str[, encoding])
+ * Buffer.from(array)
+ * Buffer.from(buffer)
+ * Buffer.from(arrayBuffer[, byteOffset[, length]])
+ **/
+Buffer.from = function (value, encodingOrOffset, length) {
+  return from(null, value, encodingOrOffset, length)
 }
 
-function getPTZPositionIndex(index) {
-    return POSITION_ARRAY[index - 1];
+if (Buffer.TYPED_ARRAY_SUPPORT) {
+  Buffer.prototype.__proto__ = Uint8Array.prototype
+  Buffer.__proto__ = Uint8Array
+  if (typeof Symbol !== 'undefined' && Symbol.species &&
+      Buffer[Symbol.species] === Buffer) {
+    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
+    Object.defineProperty(Buffer, Symbol.species, {
+      value: null,
+      configurable: true
+    })
+  }
 }
 
-function ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6) {
-    //
-    let cmd = Buffer.alloc(8);
-    // 首字节以05H开头
-    cmd[0] = 0xA5;
-    // 组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码
-    cmd[1] = 0x0F;
-    // 校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16
-    cmd[2] = 0x01;
-    //
-    if (indexValue3) {
-        cmd[3] = indexValue3;
-    }
-    if (indexValue4) {
-        cmd[4] = indexValue4;
-    }
-    if (indexValue5) {
-        cmd[5] = indexValue5;
-    }
-    if (indexValue6) {
-        cmd[6] = indexValue6;
-    }
+function assertSize (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('"size" argument must be a number')
+  } else if (size < 0) {
+    throw new RangeError('"size" argument must not be negative')
+  }
+}
 
-    cmd[7] = (cmd[0] + cmd[1] + cmd[2] + cmd[3] + cmd[4] + cmd[5] + cmd[6]) % 256;
+function alloc (that, size, fill, encoding) {
+  assertSize(size)
+  if (size <= 0) {
+    return createBuffer(that, size)
+  }
+  if (fill !== undefined) {
+    // Only pay attention to encoding if it's a string. This
+    // prevents accidentally sending in a number that would
+    // be interpretted as a start offset.
+    return typeof encoding === 'string'
+      ? createBuffer(that, size).fill(fill, encoding)
+      : createBuffer(that, size).fill(fill)
+  }
+  return createBuffer(that, size)
+}
 
-    return bytes2HexString(cmd);
+/**
+ * Creates a new filled Buffer instance.
+ * alloc(size[, fill[, encoding]])
+ **/
+Buffer.alloc = function (size, fill, encoding) {
+  return alloc(null, size, fill, encoding)
 }
 
-function bytes2HexString(byte) {
-    let hexs = "";
-    for (let i = 0; i < byte.length; i++) {
-        let hex = (byte[i]).toString(16);
-        if (hex.length === 1) {
-            hex = '0' + hex;
-        }
-        hexs += hex.toUpperCase();
+function allocUnsafe (that, size) {
+  assertSize(size)
+  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)
+  if (!Buffer.TYPED_ARRAY_SUPPORT) {
+    for (var i = 0; i < size; ++i) {
+      that[i] = 0
     }
-    return hexs;
+  }
+  return that
 }
 
+/**
+ * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
+ * */
+Buffer.allocUnsafe = function (size) {
+  return allocUnsafe(null, size)
+}
+/**
+ * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
+ */
+Buffer.allocUnsafeSlow = function (size) {
+  return allocUnsafe(null, size)
+}
 
+function fromString (that, string, encoding) {
+  if (typeof encoding !== 'string' || encoding === '') {
+    encoding = 'utf8'
+  }
 
-/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__("b639").Buffer))
+  if (!Buffer.isEncoding(encoding)) {
+    throw new TypeError('"encoding" must be a valid string encoding')
+  }
 
-/***/ }),
+  var length = byteLength(string, encoding) | 0
+  that = createBuffer(that, length)
 
-/***/ "9152":
-/***/ (function(module, exports) {
+  var actual = that.write(string, encoding)
 
-/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
-exports.read = function (buffer, offset, isLE, mLen, nBytes) {
-  var e, m
-  var eLen = (nBytes * 8) - mLen - 1
-  var eMax = (1 << eLen) - 1
-  var eBias = eMax >> 1
-  var nBits = -7
-  var i = isLE ? (nBytes - 1) : 0
-  var d = isLE ? -1 : 1
-  var s = buffer[offset + i]
+  if (actual !== length) {
+    // Writing a hex string, for example, that contains invalid characters will
+    // cause everything after the first invalid character to be ignored. (e.g.
+    // 'abxxcd' will be treated as 'ab')
+    that = that.slice(0, actual)
+  }
 
-  i += d
+  return that
+}
 
-  e = s & ((1 << (-nBits)) - 1)
-  s >>= (-nBits)
-  nBits += eLen
-  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+function fromArrayLike (that, array) {
+  var length = array.length < 0 ? 0 : checked(array.length) | 0
+  that = createBuffer(that, length)
+  for (var i = 0; i < length; i += 1) {
+    that[i] = array[i] & 255
+  }
+  return that
+}
 
-  m = e & ((1 << (-nBits)) - 1)
-  e >>= (-nBits)
-  nBits += mLen
-  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+function fromArrayBuffer (that, array, byteOffset, length) {
+  array.byteLength // this throws if `array` is not a valid ArrayBuffer
 
-  if (e === 0) {
-    e = 1 - eBias
-  } else if (e === eMax) {
-    return m ? NaN : ((s ? -1 : 1) * Infinity)
-  } else {
-    m = m + Math.pow(2, mLen)
-    e = e - eBias
+  if (byteOffset < 0 || array.byteLength < byteOffset) {
+    throw new RangeError('\'offset\' is out of bounds')
   }
-  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
-}
 
-exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
-  var e, m, c
-  var eLen = (nBytes * 8) - mLen - 1
-  var eMax = (1 << eLen) - 1
-  var eBias = eMax >> 1
-  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
-  var i = isLE ? 0 : (nBytes - 1)
-  var d = isLE ? 1 : -1
-  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
+  if (array.byteLength < byteOffset + (length || 0)) {
+    throw new RangeError('\'length\' is out of bounds')
+  }
 
-  value = Math.abs(value)
+  if (byteOffset === undefined && length === undefined) {
+    array = new Uint8Array(array)
+  } else if (length === undefined) {
+    array = new Uint8Array(array, byteOffset)
+  } else {
+    array = new Uint8Array(array, byteOffset, length)
+  }
 
-  if (isNaN(value) || value === Infinity) {
-    m = isNaN(value) ? 1 : 0
-    e = eMax
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    // Return an augmented `Uint8Array` instance, for best performance
+    that = array
+    that.__proto__ = Buffer.prototype
   } else {
-    e = Math.floor(Math.log(value) / Math.LN2)
-    if (value * (c = Math.pow(2, -e)) < 1) {
-      e--
-      c *= 2
-    }
-    if (e + eBias >= 1) {
-      value += rt / c
-    } else {
-      value += rt * Math.pow(2, 1 - eBias)
-    }
-    if (value * c >= 2) {
-      e++
-      c /= 2
-    }
-
-    if (e + eBias >= eMax) {
-      m = 0
-      e = eMax
-    } else if (e + eBias >= 1) {
-      m = ((value * c) - 1) * Math.pow(2, mLen)
-      e = e + eBias
-    } else {
-      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
-      e = 0
-    }
+    // Fallback: Return an object instance of the Buffer class
+    that = fromArrayLike(that, array)
   }
-
-  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
-
-  e = (e << mLen) | m
-  eLen += mLen
-  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
-
-  buffer[offset + i - d] |= s * 128
+  return that
 }
 
+function fromObject (that, obj) {
+  if (Buffer.isBuffer(obj)) {
+    var len = checked(obj.length) | 0
+    that = createBuffer(that, len)
 
-/***/ }),
-
-/***/ "b639":
-/***/ (function(module, exports, __webpack_require__) {
-
-"use strict";
-/* WEBPACK VAR INJECTION */(function(global) {/*!
- * The buffer module from node.js, for the browser.
- *
- * @author   Feross Aboukhadijeh <http://feross.org>
- * @license  MIT
- */
-/* eslint-disable no-proto */
-
-
+    if (that.length === 0) {
+      return that
+    }
 
-var base64 = __webpack_require__("1fb5")
-var ieee754 = __webpack_require__("9152")
-var isArray = __webpack_require__("e3db")
+    obj.copy(that, 0, 0, len)
+    return that
+  }
 
-exports.Buffer = Buffer
-exports.SlowBuffer = SlowBuffer
-exports.INSPECT_MAX_BYTES = 50
+  if (obj) {
+    if ((typeof ArrayBuffer !== 'undefined' &&
+        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {
+      if (typeof obj.length !== 'number' || isnan(obj.length)) {
+        return createBuffer(that, 0)
+      }
+      return fromArrayLike(that, obj)
+    }
 
-/**
- * If `Buffer.TYPED_ARRAY_SUPPORT`:
- *   === true    Use Uint8Array implementation (fastest)
- *   === false   Use Object implementation (most compatible, even IE6)
- *
- * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
- * Opera 11.6+, iOS 4.2+.
- *
- * Due to various browser bugs, sometimes the Object implementation will be used even
- * when the browser supports typed arrays.
- *
- * Note:
- *
- *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
- *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
- *
- *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
- *
- *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
- *     incorrect length in some situations.
+    if (obj.type === 'Buffer' && isArray(obj.data)) {
+      return fromArrayLike(that, obj.data)
+    }
+  }
 
- * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
- * get the Object implementation, which is slower but behaves correctly.
- */
-Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
-  ? global.TYPED_ARRAY_SUPPORT
-  : typedArraySupport()
+  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
+}
 
-/*
- * Export kMaxLength after typed array support is determined.
- */
-exports.kMaxLength = kMaxLength()
+function checked (length) {
+  // Note: cannot use `length < kMaxLength()` here because that fails when
+  // length is NaN (which is otherwise coerced to zero.)
+  if (length >= kMaxLength()) {
+    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
+                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
+  }
+  return length | 0
+}
 
-function typedArraySupport () {
-  try {
-    var arr = new Uint8Array(1)
-    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}
-    return arr.foo() === 42 && // typed array instances can be augmented
-        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
-        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
-  } catch (e) {
-    return false
+function SlowBuffer (length) {
+  if (+length != length) { // eslint-disable-line eqeqeq
+    length = 0
   }
+  return Buffer.alloc(+length)
 }
 
-function kMaxLength () {
-  return Buffer.TYPED_ARRAY_SUPPORT
-    ? 0x7fffffff
-    : 0x3fffffff
+Buffer.isBuffer = function isBuffer (b) {
+  return !!(b != null && b._isBuffer)
 }
 
-function createBuffer (that, length) {
-  if (kMaxLength() < length) {
-    throw new RangeError('Invalid typed array length')
+Buffer.compare = function compare (a, b) {
+  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
+    throw new TypeError('Arguments must be Buffers')
   }
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    // Return an augmented `Uint8Array` instance, for best performance
-    that = new Uint8Array(length)
-    that.__proto__ = Buffer.prototype
-  } else {
-    // Fallback: Return an object instance of the Buffer class
-    if (that === null) {
-      that = new Buffer(length)
+
+  if (a === b) return 0
+
+  var x = a.length
+  var y = b.length
+
+  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
+    if (a[i] !== b[i]) {
+      x = a[i]
+      y = b[i]
+      break
     }
-    that.length = length
   }
 
-  return that
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
 }
 
-/**
- * The Buffer constructor returns instances of `Uint8Array` that have their
- * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
- * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
- * and the `Uint8Array` methods. Square bracket notation works as expected -- it
- * returns a single octet.
- *
- * The `Uint8Array` prototype remains unmodified.
- */
+Buffer.isEncoding = function isEncoding (encoding) {
+  switch (String(encoding).toLowerCase()) {
+    case 'hex':
+    case 'utf8':
+    case 'utf-8':
+    case 'ascii':
+    case 'latin1':
+    case 'binary':
+    case 'base64':
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      return true
+    default:
+      return false
+  }
+}
 
-function Buffer (arg, encodingOrOffset, length) {
-  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {
-    return new Buffer(arg, encodingOrOffset, length)
+Buffer.concat = function concat (list, length) {
+  if (!isArray(list)) {
+    throw new TypeError('"list" argument must be an Array of Buffers')
   }
 
-  // Common case.
-  if (typeof arg === 'number') {
-    if (typeof encodingOrOffset === 'string') {
-      throw new Error(
-        'If encoding is specified then the first argument must be a string'
-      )
-    }
-    return allocUnsafe(this, arg)
+  if (list.length === 0) {
+    return Buffer.alloc(0)
   }
-  return from(this, arg, encodingOrOffset, length)
-}
 
-Buffer.poolSize = 8192 // not used by this implementation
+  var i
+  if (length === undefined) {
+    length = 0
+    for (i = 0; i < list.length; ++i) {
+      length += list[i].length
+    }
+  }
 
-// TODO: Legacy, not needed anymore. Remove in next major version.
-Buffer._augment = function (arr) {
-  arr.__proto__ = Buffer.prototype
-  return arr
+  var buffer = Buffer.allocUnsafe(length)
+  var pos = 0
+  for (i = 0; i < list.length; ++i) {
+    var buf = list[i]
+    if (!Buffer.isBuffer(buf)) {
+      throw new TypeError('"list" argument must be an Array of Buffers')
+    }
+    buf.copy(buffer, pos)
+    pos += buf.length
+  }
+  return buffer
 }
 
-function from (that, value, encodingOrOffset, length) {
-  if (typeof value === 'number') {
-    throw new TypeError('"value" argument must not be a number')
+function byteLength (string, encoding) {
+  if (Buffer.isBuffer(string)) {
+    return string.length
   }
-
-  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {
-    return fromArrayBuffer(that, value, encodingOrOffset, length)
+  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&
+      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {
+    return string.byteLength
   }
-
-  if (typeof value === 'string') {
-    return fromString(that, value, encodingOrOffset)
+  if (typeof string !== 'string') {
+    string = '' + string
   }
 
-  return fromObject(that, value)
-}
+  var len = string.length
+  if (len === 0) return 0
 
-/**
- * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
- * if value is a number.
- * Buffer.from(str[, encoding])
- * Buffer.from(array)
- * Buffer.from(buffer)
- * Buffer.from(arrayBuffer[, byteOffset[, length]])
- **/
-Buffer.from = function (value, encodingOrOffset, length) {
-  return from(null, value, encodingOrOffset, length)
-}
-
-if (Buffer.TYPED_ARRAY_SUPPORT) {
-  Buffer.prototype.__proto__ = Uint8Array.prototype
-  Buffer.__proto__ = Uint8Array
-  if (typeof Symbol !== 'undefined' && Symbol.species &&
-      Buffer[Symbol.species] === Buffer) {
-    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
-    Object.defineProperty(Buffer, Symbol.species, {
-      value: null,
-      configurable: true
-    })
+  // Use a for loop to avoid recursion
+  var loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'ascii':
+      case 'latin1':
+      case 'binary':
+        return len
+      case 'utf8':
+      case 'utf-8':
+      case undefined:
+        return utf8ToBytes(string).length
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return len * 2
+      case 'hex':
+        return len >>> 1
+      case 'base64':
+        return base64ToBytes(string).length
+      default:
+        if (loweredCase) return utf8ToBytes(string).length // assume utf8
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
   }
 }
+Buffer.byteLength = byteLength
 
-function assertSize (size) {
-  if (typeof size !== 'number') {
-    throw new TypeError('"size" argument must be a number')
-  } else if (size < 0) {
-    throw new RangeError('"size" argument must not be negative')
-  }
-}
+function slowToString (encoding, start, end) {
+  var loweredCase = false
 
-function alloc (that, size, fill, encoding) {
-  assertSize(size)
-  if (size <= 0) {
-    return createBuffer(that, size)
+  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
+  // property of a typed array.
+
+  // This behaves neither like String nor Uint8Array in that we set start/end
+  // to their upper/lower bounds if the value passed is out of range.
+  // undefined is handled specially as per ECMA-262 6th Edition,
+  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
+  if (start === undefined || start < 0) {
+    start = 0
   }
-  if (fill !== undefined) {
-    // Only pay attention to encoding if it's a string. This
-    // prevents accidentally sending in a number that would
-    // be interpretted as a start offset.
-    return typeof encoding === 'string'
-      ? createBuffer(that, size).fill(fill, encoding)
-      : createBuffer(that, size).fill(fill)
+  // Return early if start > this.length. Done here to prevent potential uint32
+  // coercion fail below.
+  if (start > this.length) {
+    return ''
   }
-  return createBuffer(that, size)
-}
 
-/**
- * Creates a new filled Buffer instance.
- * alloc(size[, fill[, encoding]])
- **/
-Buffer.alloc = function (size, fill, encoding) {
-  return alloc(null, size, fill, encoding)
-}
+  if (end === undefined || end > this.length) {
+    end = this.length
+  }
 
-function allocUnsafe (that, size) {
-  assertSize(size)
-  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) {
-    for (var i = 0; i < size; ++i) {
-      that[i] = 0
-    }
+  if (end <= 0) {
+    return ''
   }
-  return that
-}
 
-/**
- * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
- * */
-Buffer.allocUnsafe = function (size) {
-  return allocUnsafe(null, size)
-}
-/**
- * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
- */
-Buffer.allocUnsafeSlow = function (size) {
-  return allocUnsafe(null, size)
-}
+  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
+  end >>>= 0
+  start >>>= 0
 
-function fromString (that, string, encoding) {
-  if (typeof encoding !== 'string' || encoding === '') {
-    encoding = 'utf8'
+  if (end <= start) {
+    return ''
   }
 
-  if (!Buffer.isEncoding(encoding)) {
-    throw new TypeError('"encoding" must be a valid string encoding')
-  }
+  if (!encoding) encoding = 'utf8'
 
-  var length = byteLength(string, encoding) | 0
-  that = createBuffer(that, length)
+  while (true) {
+    switch (encoding) {
+      case 'hex':
+        return hexSlice(this, start, end)
 
-  var actual = that.write(string, encoding)
+      case 'utf8':
+      case 'utf-8':
+        return utf8Slice(this, start, end)
 
-  if (actual !== length) {
-    // Writing a hex string, for example, that contains invalid characters will
-    // cause everything after the first invalid character to be ignored. (e.g.
-    // 'abxxcd' will be treated as 'ab')
-    that = that.slice(0, actual)
-  }
+      case 'ascii':
+        return asciiSlice(this, start, end)
 
-  return that
-}
+      case 'latin1':
+      case 'binary':
+        return latin1Slice(this, start, end)
 
-function fromArrayLike (that, array) {
-  var length = array.length < 0 ? 0 : checked(array.length) | 0
-  that = createBuffer(that, length)
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
-  }
-  return that
-}
+      case 'base64':
+        return base64Slice(this, start, end)
 
-function fromArrayBuffer (that, array, byteOffset, length) {
-  array.byteLength // this throws if `array` is not a valid ArrayBuffer
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return utf16leSlice(this, start, end)
 
-  if (byteOffset < 0 || array.byteLength < byteOffset) {
-    throw new RangeError('\'offset\' is out of bounds')
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = (encoding + '').toLowerCase()
+        loweredCase = true
+    }
   }
+}
 
-  if (array.byteLength < byteOffset + (length || 0)) {
-    throw new RangeError('\'length\' is out of bounds')
-  }
+// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect
+// Buffer instances.
+Buffer.prototype._isBuffer = true
 
-  if (byteOffset === undefined && length === undefined) {
-    array = new Uint8Array(array)
-  } else if (length === undefined) {
-    array = new Uint8Array(array, byteOffset)
-  } else {
-    array = new Uint8Array(array, byteOffset, length)
-  }
+function swap (b, n, m) {
+  var i = b[n]
+  b[n] = b[m]
+  b[m] = i
+}
 
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    // Return an augmented `Uint8Array` instance, for best performance
-    that = array
-    that.__proto__ = Buffer.prototype
-  } else {
-    // Fallback: Return an object instance of the Buffer class
-    that = fromArrayLike(that, array)
+Buffer.prototype.swap16 = function swap16 () {
+  var len = this.length
+  if (len % 2 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 16-bits')
   }
-  return that
+  for (var i = 0; i < len; i += 2) {
+    swap(this, i, i + 1)
+  }
+  return this
 }
 
-function fromObject (that, obj) {
-  if (Buffer.isBuffer(obj)) {
-    var len = checked(obj.length) | 0
-    that = createBuffer(that, len)
-
-    if (that.length === 0) {
-      return that
-    }
-
-    obj.copy(that, 0, 0, len)
-    return that
+Buffer.prototype.swap32 = function swap32 () {
+  var len = this.length
+  if (len % 4 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 32-bits')
   }
-
-  if (obj) {
-    if ((typeof ArrayBuffer !== 'undefined' &&
-        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {
-      if (typeof obj.length !== 'number' || isnan(obj.length)) {
-        return createBuffer(that, 0)
-      }
-      return fromArrayLike(that, obj)
-    }
-
-    if (obj.type === 'Buffer' && isArray(obj.data)) {
-      return fromArrayLike(that, obj.data)
-    }
+  for (var i = 0; i < len; i += 4) {
+    swap(this, i, i + 3)
+    swap(this, i + 1, i + 2)
   }
-
-  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
+  return this
 }
 
-function checked (length) {
-  // Note: cannot use `length < kMaxLength()` here because that fails when
-  // length is NaN (which is otherwise coerced to zero.)
-  if (length >= kMaxLength()) {
-    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
-                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
+Buffer.prototype.swap64 = function swap64 () {
+  var len = this.length
+  if (len % 8 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 64-bits')
   }
-  return length | 0
-}
-
-function SlowBuffer (length) {
-  if (+length != length) { // eslint-disable-line eqeqeq
-    length = 0
-  }
-  return Buffer.alloc(+length)
-}
-
-Buffer.isBuffer = function isBuffer (b) {
-  return !!(b != null && b._isBuffer)
-}
-
-Buffer.compare = function compare (a, b) {
-  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
-    throw new TypeError('Arguments must be Buffers')
-  }
-
-  if (a === b) return 0
-
-  var x = a.length
-  var y = b.length
-
-  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
-    if (a[i] !== b[i]) {
-      x = a[i]
-      y = b[i]
-      break
-    }
-  }
-
-  if (x < y) return -1
-  if (y < x) return 1
-  return 0
-}
-
-Buffer.isEncoding = function isEncoding (encoding) {
-  switch (String(encoding).toLowerCase()) {
-    case 'hex':
-    case 'utf8':
-    case 'utf-8':
-    case 'ascii':
-    case 'latin1':
-    case 'binary':
-    case 'base64':
-    case 'ucs2':
-    case 'ucs-2':
-    case 'utf16le':
-    case 'utf-16le':
-      return true
-    default:
-      return false
-  }
-}
-
-Buffer.concat = function concat (list, length) {
-  if (!isArray(list)) {
-    throw new TypeError('"list" argument must be an Array of Buffers')
-  }
-
-  if (list.length === 0) {
-    return Buffer.alloc(0)
-  }
-
-  var i
-  if (length === undefined) {
-    length = 0
-    for (i = 0; i < list.length; ++i) {
-      length += list[i].length
-    }
-  }
-
-  var buffer = Buffer.allocUnsafe(length)
-  var pos = 0
-  for (i = 0; i < list.length; ++i) {
-    var buf = list[i]
-    if (!Buffer.isBuffer(buf)) {
-      throw new TypeError('"list" argument must be an Array of Buffers')
-    }
-    buf.copy(buffer, pos)
-    pos += buf.length
-  }
-  return buffer
-}
-
-function byteLength (string, encoding) {
-  if (Buffer.isBuffer(string)) {
-    return string.length
-  }
-  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&
-      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {
-    return string.byteLength
-  }
-  if (typeof string !== 'string') {
-    string = '' + string
-  }
-
-  var len = string.length
-  if (len === 0) return 0
-
-  // Use a for loop to avoid recursion
-  var loweredCase = false
-  for (;;) {
-    switch (encoding) {
-      case 'ascii':
-      case 'latin1':
-      case 'binary':
-        return len
-      case 'utf8':
-      case 'utf-8':
-      case undefined:
-        return utf8ToBytes(string).length
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return len * 2
-      case 'hex':
-        return len >>> 1
-      case 'base64':
-        return base64ToBytes(string).length
-      default:
-        if (loweredCase) return utf8ToBytes(string).length // assume utf8
-        encoding = ('' + encoding).toLowerCase()
-        loweredCase = true
-    }
-  }
-}
-Buffer.byteLength = byteLength
-
-function slowToString (encoding, start, end) {
-  var loweredCase = false
-
-  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
-  // property of a typed array.
-
-  // This behaves neither like String nor Uint8Array in that we set start/end
-  // to their upper/lower bounds if the value passed is out of range.
-  // undefined is handled specially as per ECMA-262 6th Edition,
-  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
-  if (start === undefined || start < 0) {
-    start = 0
-  }
-  // Return early if start > this.length. Done here to prevent potential uint32
-  // coercion fail below.
-  if (start > this.length) {
-    return ''
-  }
-
-  if (end === undefined || end > this.length) {
-    end = this.length
-  }
-
-  if (end <= 0) {
-    return ''
-  }
-
-  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
-  end >>>= 0
-  start >>>= 0
-
-  if (end <= start) {
-    return ''
-  }
-
-  if (!encoding) encoding = 'utf8'
-
-  while (true) {
-    switch (encoding) {
-      case 'hex':
-        return hexSlice(this, start, end)
-
-      case 'utf8':
-      case 'utf-8':
-        return utf8Slice(this, start, end)
-
-      case 'ascii':
-        return asciiSlice(this, start, end)
-
-      case 'latin1':
-      case 'binary':
-        return latin1Slice(this, start, end)
-
-      case 'base64':
-        return base64Slice(this, start, end)
-
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return utf16leSlice(this, start, end)
-
-      default:
-        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
-        encoding = (encoding + '').toLowerCase()
-        loweredCase = true
-    }
-  }
-}
-
-// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect
-// Buffer instances.
-Buffer.prototype._isBuffer = true
-
-function swap (b, n, m) {
-  var i = b[n]
-  b[n] = b[m]
-  b[m] = i
-}
-
-Buffer.prototype.swap16 = function swap16 () {
-  var len = this.length
-  if (len % 2 !== 0) {
-    throw new RangeError('Buffer size must be a multiple of 16-bits')
-  }
-  for (var i = 0; i < len; i += 2) {
-    swap(this, i, i + 1)
-  }
-  return this
-}
-
-Buffer.prototype.swap32 = function swap32 () {
-  var len = this.length
-  if (len % 4 !== 0) {
-    throw new RangeError('Buffer size must be a multiple of 32-bits')
-  }
-  for (var i = 0; i < len; i += 4) {
-    swap(this, i, i + 3)
-    swap(this, i + 1, i + 2)
-  }
-  return this
-}
-
-Buffer.prototype.swap64 = function swap64 () {
-  var len = this.length
-  if (len % 8 !== 0) {
-    throw new RangeError('Buffer size must be a multiple of 64-bits')
-  }
-  for (var i = 0; i < len; i += 8) {
-    swap(this, i, i + 7)
-    swap(this, i + 1, i + 6)
-    swap(this, i + 2, i + 5)
-    swap(this, i + 3, i + 4)
-  }
-  return this
+  for (var i = 0; i < len; i += 8) {
+    swap(this, i, i + 7)
+    swap(this, i + 1, i + 6)
+    swap(this, i + 2, i + 5)
+    swap(this, i + 3, i + 4)
+  }
+  return this
 }
 
 Buffer.prototype.toString = function toString () {
@@ -2144,303 +1780,611 @@ function checkIEEE754 (buf, value, offset, ext, max, min) {
   if (offset < 0) throw new RangeError('Index out of range')
 }
 
-function writeFloat (buf, value, offset, littleEndian, noAssert) {
-  if (!noAssert) {
-    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
-  }
-  ieee754.write(buf, value, offset, littleEndian, 23, 4)
-  return offset + 4
+function writeFloat (buf, value, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 23, 4)
+  return offset + 4
+}
+
+Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, false, noAssert)
+}
+
+function writeDouble (buf, value, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 52, 8)
+  return offset + 8
+}
+
+Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, false, noAssert)
+}
+
+// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
+Buffer.prototype.copy = function copy (target, targetStart, start, end) {
+  if (!start) start = 0
+  if (!end && end !== 0) end = this.length
+  if (targetStart >= target.length) targetStart = target.length
+  if (!targetStart) targetStart = 0
+  if (end > 0 && end < start) end = start
+
+  // Copy 0 bytes; we're done
+  if (end === start) return 0
+  if (target.length === 0 || this.length === 0) return 0
+
+  // Fatal error conditions
+  if (targetStart < 0) {
+    throw new RangeError('targetStart out of bounds')
+  }
+  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
+  if (end < 0) throw new RangeError('sourceEnd out of bounds')
+
+  // Are we oob?
+  if (end > this.length) end = this.length
+  if (target.length - targetStart < end - start) {
+    end = target.length - targetStart + start
+  }
+
+  var len = end - start
+  var i
+
+  if (this === target && start < targetStart && targetStart < end) {
+    // descending copy from end
+    for (i = len - 1; i >= 0; --i) {
+      target[i + targetStart] = this[i + start]
+    }
+  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
+    // ascending copy from start
+    for (i = 0; i < len; ++i) {
+      target[i + targetStart] = this[i + start]
+    }
+  } else {
+    Uint8Array.prototype.set.call(
+      target,
+      this.subarray(start, start + len),
+      targetStart
+    )
+  }
+
+  return len
+}
+
+// Usage:
+//    buffer.fill(number[, offset[, end]])
+//    buffer.fill(buffer[, offset[, end]])
+//    buffer.fill(string[, offset[, end]][, encoding])
+Buffer.prototype.fill = function fill (val, start, end, encoding) {
+  // Handle string cases:
+  if (typeof val === 'string') {
+    if (typeof start === 'string') {
+      encoding = start
+      start = 0
+      end = this.length
+    } else if (typeof end === 'string') {
+      encoding = end
+      end = this.length
+    }
+    if (val.length === 1) {
+      var code = val.charCodeAt(0)
+      if (code < 256) {
+        val = code
+      }
+    }
+    if (encoding !== undefined && typeof encoding !== 'string') {
+      throw new TypeError('encoding must be a string')
+    }
+    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
+      throw new TypeError('Unknown encoding: ' + encoding)
+    }
+  } else if (typeof val === 'number') {
+    val = val & 255
+  }
+
+  // Invalid ranges are not set to a default, so can range check early.
+  if (start < 0 || this.length < start || this.length < end) {
+    throw new RangeError('Out of range index')
+  }
+
+  if (end <= start) {
+    return this
+  }
+
+  start = start >>> 0
+  end = end === undefined ? this.length : end >>> 0
+
+  if (!val) val = 0
+
+  var i
+  if (typeof val === 'number') {
+    for (i = start; i < end; ++i) {
+      this[i] = val
+    }
+  } else {
+    var bytes = Buffer.isBuffer(val)
+      ? val
+      : utf8ToBytes(new Buffer(val, encoding).toString())
+    var len = bytes.length
+    for (i = 0; i < end - start; ++i) {
+      this[i + start] = bytes[i % len]
+    }
+  }
+
+  return this
+}
+
+// HELPER FUNCTIONS
+// ================
+
+var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
+
+function base64clean (str) {
+  // Node strips out invalid characters like \n and \t from the string, base64-js does not
+  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
+  // Node converts strings with length < 2 to ''
+  if (str.length < 2) return ''
+  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
+  while (str.length % 4 !== 0) {
+    str = str + '='
+  }
+  return str
+}
+
+function stringtrim (str) {
+  if (str.trim) return str.trim()
+  return str.replace(/^\s+|\s+$/g, '')
+}
+
+function toHex (n) {
+  if (n < 16) return '0' + n.toString(16)
+  return n.toString(16)
+}
+
+function utf8ToBytes (string, units) {
+  units = units || Infinity
+  var codePoint
+  var length = string.length
+  var leadSurrogate = null
+  var bytes = []
+
+  for (var i = 0; i < length; ++i) {
+    codePoint = string.charCodeAt(i)
+
+    // is surrogate component
+    if (codePoint > 0xD7FF && codePoint < 0xE000) {
+      // last char was a lead
+      if (!leadSurrogate) {
+        // no lead yet
+        if (codePoint > 0xDBFF) {
+          // unexpected trail
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        } else if (i + 1 === length) {
+          // unpaired lead
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        }
+
+        // valid lead
+        leadSurrogate = codePoint
+
+        continue
+      }
+
+      // 2 leads in a row
+      if (codePoint < 0xDC00) {
+        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+        leadSurrogate = codePoint
+        continue
+      }
+
+      // valid surrogate pair
+      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
+    } else if (leadSurrogate) {
+      // valid bmp char, but last char was a lead
+      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+    }
+
+    leadSurrogate = null
+
+    // encode utf8
+    if (codePoint < 0x80) {
+      if ((units -= 1) < 0) break
+      bytes.push(codePoint)
+    } else if (codePoint < 0x800) {
+      if ((units -= 2) < 0) break
+      bytes.push(
+        codePoint >> 0x6 | 0xC0,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x10000) {
+      if ((units -= 3) < 0) break
+      bytes.push(
+        codePoint >> 0xC | 0xE0,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x110000) {
+      if ((units -= 4) < 0) break
+      bytes.push(
+        codePoint >> 0x12 | 0xF0,
+        codePoint >> 0xC & 0x3F | 0x80,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else {
+      throw new Error('Invalid code point')
+    }
+  }
+
+  return bytes
+}
+
+function asciiToBytes (str) {
+  var byteArray = []
+  for (var i = 0; i < str.length; ++i) {
+    // Node's code seems to be doing this and not & 0x7F..
+    byteArray.push(str.charCodeAt(i) & 0xFF)
+  }
+  return byteArray
+}
+
+function utf16leToBytes (str, units) {
+  var c, hi, lo
+  var byteArray = []
+  for (var i = 0; i < str.length; ++i) {
+    if ((units -= 2) < 0) break
+
+    c = str.charCodeAt(i)
+    hi = c >> 8
+    lo = c % 256
+    byteArray.push(lo)
+    byteArray.push(hi)
+  }
+
+  return byteArray
+}
+
+function base64ToBytes (str) {
+  return base64.toByteArray(base64clean(str))
+}
+
+function blitBuffer (src, dst, offset, length) {
+  for (var i = 0; i < length; ++i) {
+    if ((i + offset >= dst.length) || (i >= src.length)) break
+    dst[i + offset] = src[i]
+  }
+  return i
+}
+
+function isnan (val) {
+  return val !== val // eslint-disable-line no-self-compare
+}
+
+/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__("b25b")))
+
+/***/ }),
+
+/***/ "5e42":
+/***/ (function(module, __webpack_exports__, __webpack_require__) {
+
+"use strict";
+/* harmony import */ var _plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_a326889c_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("921e");
+/* harmony import */ var _plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_a326889c_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_a326889c_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__);
+/* unused harmony reexport * */
+ /* unused harmony default export */ var _unused_webpack_default_export = (_plugin_webrtc_ui_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_plugin_webrtc_ui_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_plugin_webrtc_ui_node_modules_vue_loader_lib_loaders_stylePostLoader_js_plugin_webrtc_ui_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_plugin_webrtc_ui_node_modules_cache_loader_dist_cjs_js_ref_0_0_plugin_webrtc_ui_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_a326889c_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default.a); 
+
+/***/ }),
+
+/***/ "5f9f":
+/***/ (function(module, exports) {
+
+var toString = {}.toString;
+
+module.exports = Array.isArray || function (arr) {
+  return toString.call(arr) == '[object Array]';
+};
+
+
+/***/ }),
+
+/***/ "88a2":
+/***/ (function(module, __webpack_exports__, __webpack_require__) {
+
+"use strict";
+/* WEBPACK VAR INJECTION */(function(Buffer) {/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "b", function() { return getPTZCmd; });
+/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() { return PTZ_TYPE; });
+/**
+ * Date:2020/11/9
+ * Desc:
+ */
+/**
+ * Date:2020/11/2
+ * Desc: ptz cmd 封装
+ * cmd[0] //首字节以05H开头
+ * cmd[1] //组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码
+ *        //  校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16
+ * cmd[2] //地址的低8位？？？什么地址，地址范围000h ~ FFFh(0~4095),其中000h为广播地址
+ * cmd[3] //指令码
+ * cmd[4] //数据1,水平控制速度、聚焦速度
+ * cmd[5] //数据2，垂直控制速度、光圈速度
+ * cmd[6] // 高4位为数据3=变倍控制速度，低4位为地址高4位
+ */
+
+const PTZ_TYPE = {
+    stop: 'stop',
+    right: 'right',
+    left: 'left',
+    up: 'up',
+    down: 'down',
+    leftUp: 'leftUp',
+    leftDown: 'leftDown',
+    rightUp: 'rightUp',
+    rightDown: 'rightDown',
+    zoomFar: 'zoomFar',
+    zoomNear: 'zoomNear',
+    apertureFar: 'apertureFar',
+    apertureNear: 'apertureNear',
+    focusFar: 'focusFar',
+    focusNear: 'focusNear',
+    setPos: 'setPos',
+    calPos: 'calPos',
+    delPos: 'delPos'
+};
+
+const PTZ_CMD_TYPE = {
+    stop: 0x00,
+
+    right: 0x01,
+    left: 0x02,
+    up: 0x08,
+    down: 0x04,
+
+    leftUp: 0x0A,
+    leftDown: 0x06,
+    rightUp: 0x09,
+    rightDown: 0x05,
+
+    zoomFar: 0x10, // 镜头 放大
+    zoomNear: 0x20,  // 镜头 缩小
+
+    apertureFar: 0x48, // 光圈 缩小
+    apertureNear: 0x44, // 光圈 放大
+
+    focusFar: 0x42, // 聚焦 近
+    focusNear: 0x41, // 聚焦 远
+
+    setPos: 0x81,
+    calPos: 0x82,
+    delPos: 0x83
+};
+
+const SPEED_ARRAY = [0x19, 0x32, 0x4b, 0x64, 0x7d, 0x96, 0xAF, 0xC8, 0xE1, 0xFA];
+const POSITION_ARRAY = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10];
+
+// 获取 direction 方向型
+/**
+ *
+ * @param options
+ *        type:
+ *        speed:default 5
+ *        index:
+ * @returns {string}
+ */
+function getPTZCmd(options) {
+    const {type, speed, index} = options;
+    const ptzSpeed = getPTZSpeed(speed);
+    let indexValue3, indexValue4, indexValue5, indexValue6;
+    indexValue3 = PTZ_CMD_TYPE[type];
+    switch (type) {
+        case PTZ_TYPE.up:
+        case PTZ_TYPE.down:
+        case PTZ_TYPE.apertureFar:
+        case PTZ_TYPE.apertureNear:
+            indexValue5 = ptzSpeed;
+            break;
+        case PTZ_TYPE.right:
+        case PTZ_TYPE.left:
+        case PTZ_TYPE.focusFar:
+        case PTZ_TYPE.focusNear:
+            indexValue4 = ptzSpeed;
+            break;
+        case PTZ_TYPE.leftUp:
+        case PTZ_TYPE.leftDown:
+        case PTZ_TYPE.rightUp:
+        case PTZ_TYPE.rightDown:
+            indexValue4 = ptzSpeed;
+            indexValue5 = ptzSpeed;
+            break;
+        case PTZ_TYPE.zoomFar:
+        case PTZ_TYPE.zoomNear:
+            indexValue6 = 0x10;
+            break;
+        case PTZ_TYPE.calPos:
+        case PTZ_TYPE.delPos:
+        case PTZ_TYPE.setPos:
+            indexValue5 = getPTZPositionIndex(index);
+            break;
+        default:
+            break;
+    }
+    return ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6);
+}
+
+function getPTZSpeed(speed) {
+    speed = speed || 5;
+    const speedIndex = speed - 1;
+    const ptzSpeed = SPEED_ARRAY[speedIndex] || SPEED_ARRAY[4];
+    return ptzSpeed;
 }
 
-Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
-  return writeFloat(this, value, offset, true, noAssert)
+function getPTZPositionIndex(index) {
+    return POSITION_ARRAY[index - 1];
 }
 
-Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
-  return writeFloat(this, value, offset, false, noAssert)
-}
+function ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6) {
+    //
+    let cmd = Buffer.alloc(8);
+    // 首字节以05H开头
+    cmd[0] = 0xA5;
+    // 组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码
+    cmd[1] = 0x0F;
+    // 校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16
+    cmd[2] = 0x01;
+    //
+    if (indexValue3) {
+        cmd[3] = indexValue3;
+    }
+    if (indexValue4) {
+        cmd[4] = indexValue4;
+    }
+    if (indexValue5) {
+        cmd[5] = indexValue5;
+    }
+    if (indexValue6) {
+        cmd[6] = indexValue6;
+    }
 
-function writeDouble (buf, value, offset, littleEndian, noAssert) {
-  if (!noAssert) {
-    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
-  }
-  ieee754.write(buf, value, offset, littleEndian, 52, 8)
-  return offset + 8
-}
+    cmd[7] = (cmd[0] + cmd[1] + cmd[2] + cmd[3] + cmd[4] + cmd[5] + cmd[6]) % 256;
 
-Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
-  return writeDouble(this, value, offset, true, noAssert)
+    return bytes2HexString(cmd);
 }
 
-Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
-  return writeDouble(this, value, offset, false, noAssert)
+function bytes2HexString(byte) {
+    let hexs = "";
+    for (let i = 0; i < byte.length; i++) {
+        let hex = (byte[i]).toString(16);
+        if (hex.length === 1) {
+            hex = '0' + hex;
+        }
+        hexs += hex.toUpperCase();
+    }
+    return hexs;
 }
 
-// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
-Buffer.prototype.copy = function copy (target, targetStart, start, end) {
-  if (!start) start = 0
-  if (!end && end !== 0) end = this.length
-  if (targetStart >= target.length) targetStart = target.length
-  if (!targetStart) targetStart = 0
-  if (end > 0 && end < start) end = start
 
-  // Copy 0 bytes; we're done
-  if (end === start) return 0
-  if (target.length === 0 || this.length === 0) return 0
 
-  // Fatal error conditions
-  if (targetStart < 0) {
-    throw new RangeError('targetStart out of bounds')
-  }
-  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
-  if (end < 0) throw new RangeError('sourceEnd out of bounds')
+/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__("32dd").Buffer))
 
-  // Are we oob?
-  if (end > this.length) end = this.length
-  if (target.length - targetStart < end - start) {
-    end = target.length - targetStart + start
-  }
+/***/ }),
 
-  var len = end - start
-  var i
+/***/ "921e":
+/***/ (function(module, exports, __webpack_require__) {
 
-  if (this === target && start < targetStart && targetStart < end) {
-    // descending copy from end
-    for (i = len - 1; i >= 0; --i) {
-      target[i + targetStart] = this[i + start]
-    }
-  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
-    // ascending copy from start
-    for (i = 0; i < len; ++i) {
-      target[i + targetStart] = this[i + start]
-    }
-  } else {
-    Uint8Array.prototype.set.call(
-      target,
-      this.subarray(start, start + len),
-      targetStart
-    )
-  }
+// extracted by mini-css-extract-plugin
 
-  return len
-}
+/***/ }),
 
-// Usage:
-//    buffer.fill(number[, offset[, end]])
-//    buffer.fill(buffer[, offset[, end]])
-//    buffer.fill(string[, offset[, end]][, encoding])
-Buffer.prototype.fill = function fill (val, start, end, encoding) {
-  // Handle string cases:
-  if (typeof val === 'string') {
-    if (typeof start === 'string') {
-      encoding = start
-      start = 0
-      end = this.length
-    } else if (typeof end === 'string') {
-      encoding = end
-      end = this.length
-    }
-    if (val.length === 1) {
-      var code = val.charCodeAt(0)
-      if (code < 256) {
-        val = code
-      }
-    }
-    if (encoding !== undefined && typeof encoding !== 'string') {
-      throw new TypeError('encoding must be a string')
-    }
-    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
-      throw new TypeError('Unknown encoding: ' + encoding)
-    }
-  } else if (typeof val === 'number') {
-    val = val & 255
-  }
+/***/ "99fc":
+/***/ (function(module, exports) {
 
-  // Invalid ranges are not set to a default, so can range check early.
-  if (start < 0 || this.length < start || this.length < end) {
-    throw new RangeError('Out of range index')
-  }
+exports.read = function (buffer, offset, isLE, mLen, nBytes) {
+  var e, m
+  var eLen = (nBytes * 8) - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var nBits = -7
+  var i = isLE ? (nBytes - 1) : 0
+  var d = isLE ? -1 : 1
+  var s = buffer[offset + i]
 
-  if (end <= start) {
-    return this
-  }
+  i += d
 
-  start = start >>> 0
-  end = end === undefined ? this.length : end >>> 0
+  e = s & ((1 << (-nBits)) - 1)
+  s >>= (-nBits)
+  nBits += eLen
+  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
 
-  if (!val) val = 0
+  m = e & ((1 << (-nBits)) - 1)
+  e >>= (-nBits)
+  nBits += mLen
+  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
 
-  var i
-  if (typeof val === 'number') {
-    for (i = start; i < end; ++i) {
-      this[i] = val
-    }
+  if (e === 0) {
+    e = 1 - eBias
+  } else if (e === eMax) {
+    return m ? NaN : ((s ? -1 : 1) * Infinity)
   } else {
-    var bytes = Buffer.isBuffer(val)
-      ? val
-      : utf8ToBytes(new Buffer(val, encoding).toString())
-    var len = bytes.length
-    for (i = 0; i < end - start; ++i) {
-      this[i + start] = bytes[i % len]
-    }
-  }
-
-  return this
-}
-
-// HELPER FUNCTIONS
-// ================
-
-var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
-
-function base64clean (str) {
-  // Node strips out invalid characters like \n and \t from the string, base64-js does not
-  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
-  // Node converts strings with length < 2 to ''
-  if (str.length < 2) return ''
-  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
-  while (str.length % 4 !== 0) {
-    str = str + '='
+    m = m + Math.pow(2, mLen)
+    e = e - eBias
   }
-  return str
-}
-
-function stringtrim (str) {
-  if (str.trim) return str.trim()
-  return str.replace(/^\s+|\s+$/g, '')
-}
-
-function toHex (n) {
-  if (n < 16) return '0' + n.toString(16)
-  return n.toString(16)
+  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
 }
 
-function utf8ToBytes (string, units) {
-  units = units || Infinity
-  var codePoint
-  var length = string.length
-  var leadSurrogate = null
-  var bytes = []
-
-  for (var i = 0; i < length; ++i) {
-    codePoint = string.charCodeAt(i)
-
-    // is surrogate component
-    if (codePoint > 0xD7FF && codePoint < 0xE000) {
-      // last char was a lead
-      if (!leadSurrogate) {
-        // no lead yet
-        if (codePoint > 0xDBFF) {
-          // unexpected trail
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        } else if (i + 1 === length) {
-          // unpaired lead
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        }
-
-        // valid lead
-        leadSurrogate = codePoint
-
-        continue
-      }
+exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
+  var e, m, c
+  var eLen = (nBytes * 8) - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
+  var i = isLE ? 0 : (nBytes - 1)
+  var d = isLE ? 1 : -1
+  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
 
-      // 2 leads in a row
-      if (codePoint < 0xDC00) {
-        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-        leadSurrogate = codePoint
-        continue
-      }
+  value = Math.abs(value)
 
-      // valid surrogate pair
-      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
-    } else if (leadSurrogate) {
-      // valid bmp char, but last char was a lead
-      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+  if (isNaN(value) || value === Infinity) {
+    m = isNaN(value) ? 1 : 0
+    e = eMax
+  } else {
+    e = Math.floor(Math.log(value) / Math.LN2)
+    if (value * (c = Math.pow(2, -e)) < 1) {
+      e--
+      c *= 2
     }
-
-    leadSurrogate = null
-
-    // encode utf8
-    if (codePoint < 0x80) {
-      if ((units -= 1) < 0) break
-      bytes.push(codePoint)
-    } else if (codePoint < 0x800) {
-      if ((units -= 2) < 0) break
-      bytes.push(
-        codePoint >> 0x6 | 0xC0,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x10000) {
-      if ((units -= 3) < 0) break
-      bytes.push(
-        codePoint >> 0xC | 0xE0,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x110000) {
-      if ((units -= 4) < 0) break
-      bytes.push(
-        codePoint >> 0x12 | 0xF0,
-        codePoint >> 0xC & 0x3F | 0x80,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
+    if (e + eBias >= 1) {
+      value += rt / c
     } else {
-      throw new Error('Invalid code point')
+      value += rt * Math.pow(2, 1 - eBias)
+    }
+    if (value * c >= 2) {
+      e++
+      c /= 2
     }
-  }
-
-  return bytes
-}
 
-function asciiToBytes (str) {
-  var byteArray = []
-  for (var i = 0; i < str.length; ++i) {
-    // Node's code seems to be doing this and not & 0x7F..
-    byteArray.push(str.charCodeAt(i) & 0xFF)
+    if (e + eBias >= eMax) {
+      m = 0
+      e = eMax
+    } else if (e + eBias >= 1) {
+      m = ((value * c) - 1) * Math.pow(2, mLen)
+      e = e + eBias
+    } else {
+      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
+      e = 0
+    }
   }
-  return byteArray
-}
 
-function utf16leToBytes (str, units) {
-  var c, hi, lo
-  var byteArray = []
-  for (var i = 0; i < str.length; ++i) {
-    if ((units -= 2) < 0) break
+  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
-    c = str.charCodeAt(i)
-    hi = c >> 8
-    lo = c % 256
-    byteArray.push(lo)
-    byteArray.push(hi)
-  }
+  e = (e << mLen) | m
+  eLen += mLen
+  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
 
-  return byteArray
+  buffer[offset + i - d] |= s * 128
 }
 
-function base64ToBytes (str) {
-  return base64.toByteArray(base64clean(str))
-}
 
-function blitBuffer (src, dst, offset, length) {
-  for (var i = 0; i < length; ++i) {
-    if ((i + offset >= dst.length) || (i >= src.length)) break
-    dst[i + offset] = src[i]
-  }
-  return i
-}
+/***/ }),
 
-function isnan (val) {
-  return val !== val // eslint-disable-line no-self-compare
-}
+/***/ "9e83":
+/***/ (function(module, exports, __webpack_require__) {
 
-/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__("c8ba")))
+// extracted by mini-css-extract-plugin
 
 /***/ }),
 
-/***/ "c8ba":
+/***/ "b25b":
 /***/ (function(module, exports) {
 
 var g;
@@ -2467,57 +2411,20 @@ module.exports = g;
 
 /***/ }),
 
-/***/ "d989":
-/***/ (function(module, exports, __webpack_require__) {
-
-// extracted by mini-css-extract-plugin
-
-/***/ }),
-
-/***/ "dc29":
-/***/ (function(module, exports, __webpack_require__) {
-
-// extracted by mini-css-extract-plugin
-
-/***/ }),
-
-/***/ "e3db":
-/***/ (function(module, exports) {
-
-var toString = {}.toString;
-
-module.exports = Array.isArray || function (arr) {
-  return toString.call(arr) == '[object Array]';
-};
-
-
-/***/ }),
-
-/***/ "fa0b":
-/***/ (function(module, __webpack_exports__, __webpack_require__) {
-
-"use strict";
-/* harmony import */ var _node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_379ce7fe_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("2d55");
-/* harmony import */ var _node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_379ce7fe_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_node_modules_mini_css_extract_plugin_dist_loader_js_ref_6_oneOf_1_0_node_modules_css_loader_dist_cjs_js_ref_6_oneOf_1_1_node_modules_vue_loader_lib_loaders_stylePostLoader_js_node_modules_postcss_loader_src_index_js_ref_6_oneOf_1_2_node_modules_cache_loader_dist_cjs_js_ref_0_0_node_modules_vue_loader_lib_index_js_vue_loader_options_Player2_vue_vue_type_style_index_0_id_379ce7fe_scoped_true_lang_css___WEBPACK_IMPORTED_MODULE_0__);
-/* unused harmony reexport * */
-
-
-/***/ }),
-
-/***/ "fb15":
+/***/ "deee":
 /***/ (function(module, __webpack_exports__, __webpack_require__) {
 
 "use strict";
 // ESM COMPAT FLAG
 __webpack_require__.r(__webpack_exports__);
 
-// CONCATENATED MODULE: ./node_modules/@vue/cli-service/lib/commands/build/setPublicPath.js
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/@vue/cli-service/lib/commands/build/setPublicPath.js
 // This file is imported into lib/wc client bundles.
 
 if (typeof window !== 'undefined') {
   var currentScript = window.document.currentScript
   if (true) {
-    var getCurrentScript = __webpack_require__("8875")
+    var getCurrentScript = __webpack_require__("f3a8")
     currentScript = getCurrentScript()
 
     // for backward compatibility, because previously we directly included the polyfill
@@ -2535,29 +2442,29 @@ if (typeof window !== 'undefined') {
 // Indicate to webpack that this file can be concatenated
 /* harmony default export */ var setPublicPath = (null);
 
-// CONCATENATED MODULE: ./node_modules/cache-loader/dist/cjs.js?{"cacheDirectory":"node_modules/.cache/vue-loader","cacheIdentifier":"a0faeafc-vue-loader-template"}!./node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/App.vue?vue&type=template&id=77f8f0e9&scoped=true&
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js?{"cacheDirectory":"node_modules/.cache/vue-loader","cacheIdentifier":"2507526a-vue-loader-template"}!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib??vue-loader-options!./src/App.vue?vue&type=template&id=7bad0327&scoped=true&
 var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',[(_vm.$parent.titleTabActive === 0)?_c('div',{staticClass:"tabpanel"},[_c('mu-data-table',{attrs:{"data":_vm.Devices,"columns":_vm.columns},scopedSlots:_vm._u([{key:"expand",fn:function(prop){return [_c('mu-data-table',{attrs:{"data":prop.row.Channels,"columns":_vm.columns2},scopedSlots:_vm._u([{key:"default",fn:function(ref){
 var item = ref.row;
 var $index = ref.$index;
-return [_c('td',[_vm._v(_vm._s(item.DeviceID))]),_c('td',[_vm._v(_vm._s(item.Name))]),_c('td',[_vm._v(_vm._s(item.Manufacturer))]),_c('td',[_vm._v(_vm._s(item.Address))]),_c('td',[_vm._v(_vm._s(item.Status))]),_c('td',[(item.Connected)?_c('mu-button',{attrs:{"flat":""},on:{"click":function($event){return _vm.ptz(prop.row.ID, $index,item)}}},[_vm._v("云台 ")]):_vm._e(),(item.Connected)?_c('mu-button',{attrs:{"flat":""},on:{"click":function($event){return _vm.bye(prop.row.ID, $index)}}},[_vm._v("断开")]):_c('mu-button',{attrs:{"flat":""},on:{"click":function($event){return _vm.invite(prop.row.ID, $index,item)}}},[_vm._v("连接 ")])],1)]}}],null,true)})]}},{key:"default",fn:function(ref){
+return [_c('td',[_vm._v(_vm._s(item.DeviceID))]),_c('td',[_vm._v(_vm._s(item.Name))]),_c('td',[_vm._v(_vm._s(item.Manufacturer))]),_c('td',[_vm._v(_vm._s(item.Address))]),_c('td',[_vm._v(_vm._s(item.Status))]),_c('td',[(item.Connected)?_c('mu-button',{attrs:{"flat":""},on:{"click":function($event){return _vm.ptz(prop.row.ID, $index, item)}}},[_vm._v("云台 ")]):_vm._e(),(item.Connected)?_c('mu-button',{attrs:{"flat":""},on:{"click":function($event){return _vm.bye(prop.row.ID, $index)}}},[_vm._v("断开")]):_c('mu-button',{attrs:{"flat":""},on:{"click":function($event){return _vm.invite(prop.row.ID, $index, item)}}},[_vm._v("连接 ")])],1)]}}],null,true)})]}},{key:"default",fn:function(ref){
 var item = ref.row;
-return [_c('td',[_vm._v(_vm._s(item.ID))]),_c('td',[_vm._v(_vm._s(item.Channels ? item.Channels.length : 0))]),_c('td',[_c('StartTime',{attrs:{"value":item.RegisterTime}})],1),_c('td',[_c('StartTime',{attrs:{"value":item.UpdateTime}})],1),_c('td',[_vm._v(_vm._s(item.Status))])]}}],null,false,2342048966)})],1):_vm._e(),(_vm.$parent.titleTabActive === 1)?_c('div',{staticClass:"tabpanel"},[_c('div',{staticClass:"search"},[_c('i-select',{attrs:{"multiple":""},model:{value:(_vm.channelSelectedList),callback:function ($$v) {_vm.channelSelectedList=$$v},expression:"channelSelectedList"}},_vm._l((_vm.channelList),function(channel,index){return _c('Option',{key:index,attrs:{"value":channel,"label":channel.DeviceID + '(' + channel.Name + ')'}})}),1)],1),_c('div',{staticClass:"flex-box"},[_vm._l((_vm.channelSelectedList),function(channel,index){return [(channel.ID)?_c('div',{key:index,staticClass:"flex-item"},[_c('webrtc-player2',{attrs:{"stream-path":'gb28181/'+channel.ID}})],1):_vm._e()]})],2)]):_vm._e(),_c('webrtc-player',{ref:"player",attrs:{"PublicIP":_vm.PublicIP},on:{"ptz":_vm.sendPtz},model:{value:(_vm.previewStreamPath),callback:function ($$v) {_vm.previewStreamPath=$$v},expression:"previewStreamPath"}})],1)}
+return [_c('td',[_vm._v(_vm._s(item.ID))]),_c('td',[_vm._v(_vm._s(item.Addr))]),_c('td',[_vm._v(_vm._s(item.Channels ? item.Channels.length : 0))]),_c('td',[_c('StartTime',{attrs:{"value":item.RegisterTime}})],1),_c('td',[_c('StartTime',{attrs:{"value":item.UpdateTime}})],1),_c('td',[_vm._v(_vm._s(item.Status))])]}}],null,false,2809573184)})],1):_vm._e(),(_vm.$parent.titleTabActive === 1)?_c('div',{staticClass:"tabpanel"},[_c('div',{staticClass:"search"},[_c('i-select',{attrs:{"multiple":""},model:{value:(_vm.channelSelectedList),callback:function ($$v) {_vm.channelSelectedList=$$v},expression:"channelSelectedList"}},_vm._l((_vm.channelList),function(channel,index){return _c('Option',{key:index,attrs:{"value":channel,"label":channel.DeviceID + '(' + channel.Name + ')'}})}),1)],1),_c('div',{staticClass:"flex-box"},[_vm._l((_vm.channelSelectedList),function(channel,index){return [(channel.ID)?_c('div',{key:index,staticClass:"flex-item"},[_c('webrtc-player2',{attrs:{"stream-path":'gb28181/' + channel.ID}})],1):_vm._e()]})],2)]):_vm._e(),_c('webrtc-player',{ref:"player",attrs:{"PublicIP":_vm.PublicIP},on:{"ptz":_vm.sendPtz},model:{value:(_vm.previewStreamPath),callback:function ($$v) {_vm.previewStreamPath=$$v},expression:"previewStreamPath"}})],1)}
 var staticRenderFns = []
 
 
-// CONCATENATED MODULE: ./src/App.vue?vue&type=template&id=77f8f0e9&scoped=true&
+// CONCATENATED MODULE: ./src/App.vue?vue&type=template&id=7bad0327&scoped=true&
 
-// CONCATENATED MODULE: ./node_modules/cache-loader/dist/cjs.js?{"cacheDirectory":"node_modules/.cache/vue-loader","cacheIdentifier":"a0faeafc-vue-loader-template"}!./node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/components/Player.vue?vue&type=template&id=76558468&scoped=true&
-var Playervue_type_template_id_76558468_scoped_true_render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('Modal',_vm._g(_vm._b({attrs:{"draggable":"","width":"750","title":_vm.streamPath},on:{"on-ok":_vm.onClosePreview,"on-cancel":_vm.onClosePreview}},'Modal',_vm.$attrs,false),_vm.$listeners),[_c('div',{staticClass:"container"},[_c('video',{ref:"webrtc",attrs:{"width":"488","height":"275","autoplay":"","muted":"","controls":""},domProps:{"srcObject":_vm.stream,"muted":true}}),_c('div',{staticClass:"control"},[_vm._l((8),function(n){return _c('svg',{class:'arrow'+n,attrs:{"viewBox":"0 0 1024 1024","version":"1.1","xmlns":"http://www.w3.org/2000/svg","xmlns:xlink":"http://www.w3.org/1999/xlink","width":"64","height":"64"},on:{"click":function($event){return _vm.ptzCmdDirection(n)}}},[_c('defs'),_c('path',{attrs:{"d":"M682.666667 955.733333H341.333333a17.066667 17.066667 0 0 1-17.066666-17.066666V529.066667H85.333333a17.066667 17.066667 0 0 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341.333333 0 1 1 170.666667 512 341.333333 341.333333 0 0 1 512 170.666667m0-42.666667a384 384 0 1 0 384 384A384 384 0 0 0 512 128z"}}),_c('path',{attrs:{"fill":"#333333","d":"M298.666667 533.333333H170.666667a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM853.333333 533.333333h-128a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM512 320a21.333333 21.333333 0 0 1-21.333333-21.333333V170.666667a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333333zM512 874.666667a21.333333 21.333333 0 0 1-21.333333-21.333334v-128a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333334z"}})])]),_c('div',{staticClass:"control5"},[_c('i-select',{staticStyle:{"width":"100px"},model:{value:(_vm.ptzPositionIndex),callback:function ($$v) {_vm.ptzPositionIndex=$$v},expression:"ptzPositionIndex"}},_vm._l((10),function(n){return _c('Option',{key:n,attrs:{"value":n}},[_vm._v("预置点"+_vm._s(n))])}),1),_c('i-button',{attrs:{"type":"primary"},on:{"click":function($event){return _vm.ptzCmd(_vm.ptzType.setPos)}}},[_vm._v("设置")]),_c('i-button',{attrs:{"type":"success"},on:{"click":function($event){return _vm.ptzCmd(_vm.ptzType.calPos)}}},[_vm._v("调用")]),_c('i-button',{attrs:{"type":"error"},on:{"click":function($event){return _vm.ptzCmd(_vm.ptzType.delPos)}}},[_vm._v("删除")]),_vm._v(" 速度： "),_c('InputNumber',{attrs:{"max":10,"min":1},model:{value:(_vm.ptzSpeed),callback:function ($$v) {_vm.ptzSpeed=$$v},expression:"ptzSpeed"}})],1)]),_c('div',{attrs:{"slot":"footer"},slot:"footer"},[(_vm.remoteSDP)?_c('mu-badge',[_c('a',{attrs:{"slot":"content","href":_vm.remoteSDPURL,"download":"remoteSDP.txt"},slot:"content"},[_vm._v("remoteSDP")])]):_vm._e(),(_vm.localSDP)?_c('mu-badge',[_c('a',{attrs:{"slot":"content","href":_vm.localSDPURL,"download":"localSDP.txt"},slot:"content"},[_vm._v("localSDP")])]):_vm._e()],1)])}
+var Playervue_type_template_id_a6774e8e_scoped_true_staticRenderFns = []
 
 
-// CONCATENATED MODULE: ./src/components/Player.vue?vue&type=template&id=76558468&scoped=true&
+// CONCATENATED MODULE: ./src/components/Player.vue?vue&type=template&id=a6774e8e&scoped=true&
 
 // EXTERNAL MODULE: ./src/utils/ptz-cmd.js
 var ptz_cmd = __webpack_require__("88a2");
 
-// CONCATENATED MODULE: ./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/components/Player.vue?vue&type=script&lang=js&
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib??vue-loader-options!./src/components/Player.vue?vue&type=script&lang=js&
 //
 //
 //
@@ -2693,10 +2600,10 @@ var ptz_cmd = __webpack_require__("88a2");
 
 // CONCATENATED MODULE: ./src/components/Player.vue?vue&type=script&lang=js&
  /* harmony default export */ var components_Playervue_type_script_lang_js_ = (Playervue_type_script_lang_js_); 
-// EXTERNAL MODULE: ./src/components/Player.vue?vue&type=style&index=0&id=76558468&scoped=true&lang=css&
-var Playervue_type_style_index_0_id_76558468_scoped_true_lang_css_ = __webpack_require__("040c");
+// EXTERNAL MODULE: ./src/components/Player.vue?vue&type=style&index=0&id=a6774e8e&scoped=true&lang=css&
+var Playervue_type_style_index_0_id_a6774e8e_scoped_true_lang_css_ = __webpack_require__("2d15");
 
-// CONCATENATED MODULE: ./node_modules/vue-loader/lib/runtime/componentNormalizer.js
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib/runtime/componentNormalizer.js
 /* globals __VUE_SSR_CONTEXT__ */
 
 // IMPORTANT: Do NOT use ES2015 features in this file (except for modules).
@@ -2807,24 +2714,24 @@ function normalizeComponent (
 
 var component = normalizeComponent(
   components_Playervue_type_script_lang_js_,
-  Playervue_type_template_id_76558468_scoped_true_render,
-  Playervue_type_template_id_76558468_scoped_true_staticRenderFns,
+  Playervue_type_template_id_a6774e8e_scoped_true_render,
+  Playervue_type_template_id_a6774e8e_scoped_true_staticRenderFns,
   false,
   null,
-  "76558468",
+  "a6774e8e",
   null
   
 )
 
 /* harmony default export */ var Player = (component.exports);
-// CONCATENATED MODULE: ./node_modules/cache-loader/dist/cjs.js?{"cacheDirectory":"node_modules/.cache/vue-loader","cacheIdentifier":"a0faeafc-vue-loader-template"}!./node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/components/Player2.vue?vue&type=template&id=379ce7fe&scoped=true&
-var Player2vue_type_template_id_379ce7fe_scoped_true_render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',{staticClass:"player-wrap"},[(_vm.rtcStream)?[_c('video',{attrs:{"autoplay":"","muted":"","controls":""},domProps:{"srcObject":_vm.rtcStream,"muted":true}})]:_vm._e()],2)}
-var Player2vue_type_template_id_379ce7fe_scoped_true_staticRenderFns = []
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js?{"cacheDirectory":"node_modules/.cache/vue-loader","cacheIdentifier":"2507526a-vue-loader-template"}!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib??vue-loader-options!./src/components/Player2.vue?vue&type=template&id=a326889c&scoped=true&
+var Player2vue_type_template_id_a326889c_scoped_true_render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',{staticClass:"player-wrap"},[(_vm.rtcStream)?[_c('video',{attrs:{"autoplay":"","muted":"","controls":""},domProps:{"srcObject":_vm.rtcStream,"muted":true}})]:_vm._e()],2)}
+var Player2vue_type_template_id_a326889c_scoped_true_staticRenderFns = []
 
 
-// CONCATENATED MODULE: ./src/components/Player2.vue?vue&type=template&id=379ce7fe&scoped=true&
+// CONCATENATED MODULE: ./src/components/Player2.vue?vue&type=template&id=a326889c&scoped=true&
 
-// CONCATENATED MODULE: ./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/components/Player2.vue?vue&type=script&lang=js&
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib??vue-loader-options!./src/components/Player2.vue?vue&type=script&lang=js&
 //
 //
 //
@@ -2923,8 +2830,8 @@ var Player2vue_type_template_id_379ce7fe_scoped_true_staticRenderFns = []
 
 // CONCATENATED MODULE: ./src/components/Player2.vue?vue&type=script&lang=js&
  /* harmony default export */ var components_Player2vue_type_script_lang_js_ = (Player2vue_type_script_lang_js_); 
-// EXTERNAL MODULE: ./src/components/Player2.vue?vue&type=style&index=0&id=379ce7fe&scoped=true&lang=css&
-var Player2vue_type_style_index_0_id_379ce7fe_scoped_true_lang_css_ = __webpack_require__("fa0b");
+// EXTERNAL MODULE: ./src/components/Player2.vue?vue&type=style&index=0&id=a326889c&scoped=true&lang=css&
+var Player2vue_type_style_index_0_id_a326889c_scoped_true_lang_css_ = __webpack_require__("5e42");
 
 // CONCATENATED MODULE: ./src/components/Player2.vue
 
@@ -2937,17 +2844,41 @@ var Player2vue_type_style_index_0_id_379ce7fe_scoped_true_lang_css_ = __webpack_
 
 var Player2_component = normalizeComponent(
   components_Player2vue_type_script_lang_js_,
-  Player2vue_type_template_id_379ce7fe_scoped_true_render,
-  Player2vue_type_template_id_379ce7fe_scoped_true_staticRenderFns,
+  Player2vue_type_template_id_a326889c_scoped_true_render,
+  Player2vue_type_template_id_a326889c_scoped_true_staticRenderFns,
   false,
   null,
-  "379ce7fe",
+  "a326889c",
   null
   
 )
 
 /* harmony default export */ var Player2 = (Player2_component.exports);
-// CONCATENATED MODULE: ./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/App.vue?vue&type=script&lang=js&
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/vue-loader/lib??vue-loader-options!./src/App.vue?vue&type=script&lang=js&
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
+//
 //
 //
 //
@@ -3014,32 +2945,38 @@ var Player2_component = normalizeComponent(
 /* harmony default export */ var Appvue_type_script_lang_js_ = ({
     components: {
         WebrtcPlayer: Player,
-        WebrtcPlayer2: Player2
+        WebrtcPlayer2: Player2,
     },
     props: {
-        ListenAddr: String
+        ListenAddr: String,
     },
     computed: {
         PublicIP() {
-            return this.ListenAddr.split(":")[0]
-        }
+            return this.ListenAddr.split(":")[0];
+        },
     },
     data() {
         return {
-            Devices: [], previewStreamPath: false,
+            Devices: [],
+            previewStreamPath: false,
             channelList: [],
-            channelSelectedList:[],
+            channelSelectedList: [],
             context: {
                 id: null,
                 channel: 0,
-                item: null
+                item: null,
             },
             columns: Object.freeze(
-                ["设备号", "通道数", "注册时间", "更新时间", "状态"].map(
-                    (title) => ({
-                        title,
-                    })
-                )
+                [
+                    "设备号",
+                    "地址",
+                    "通道数",
+                    "注册时间",
+                    "更新时间",
+                    "状态",
+                ].map((title) => ({
+                    title,
+                }))
             ),
             columns2: Object.freeze([
                 "通道编号",
@@ -3048,7 +2985,7 @@ var Player2_component = normalizeComponent(
                 "地址",
                 "状态",
                 "操作",
-            ]).map((title) => ({title})),
+            ]).map((title) => ({ title })),
         };
     },
     created() {
@@ -3064,14 +3001,14 @@ var Player2_component = normalizeComponent(
                 if (!evt.data) return;
                 this.Devices = JSON.parse(evt.data) || [];
                 this.Devices.sort((a, b) => (a.ID > b.ID ? 1 : -1));
-                let channelList =[]
-                this.Devices.forEach((device)=>{
-                  const channels = device.Channels || [];
-                  if(channels.length > 0){
-                      channelList = channelList.concat(channels);
-                  }
+                let channelList = [];
+                this.Devices.forEach((device) => {
+                    const channels = device.Channels || [];
+                    if (channels.length > 0) {
+                        channelList = channelList.concat(channels);
+                    }
                 });
-                if(channelList.length > 0){
+                if (channelList.length > 0) {
                     this.channelList = channelList;
                 }
             };
@@ -3079,48 +3016,57 @@ var Player2_component = normalizeComponent(
         },
         ptz(id, channel, item) {
             this.context = {
-                id, channel, item
+                id,
+                channel,
+                item,
             };
-            this.previewStreamPath = true
-            this.$nextTick(() => this.$refs.player.play("gb28181/" + item.DeviceID));
+            this.previewStreamPath = true;
+            this.$nextTick(() =>
+                this.$refs.player.play("gb28181/" + item.DeviceID)
+            );
         },
         sendPtz(options) {
             const ptzCmd = Object(ptz_cmd["b" /* getPTZCmd */])(options);
-            const ptzCmdStop = Object(ptz_cmd["b" /* getPTZCmd */])({type: ptz_cmd["a" /* PTZ_TYPE */].stop});
-            this.ajax.get("/gb28181/control", {
-                id: this.context.id,
-                channel: this.context.channel,
-                ptzcmd: ptzCmd,
-            }).then(x => {
-                if (options.type === ptz_cmd["a" /* PTZ_TYPE */].stop || options.cycle === true) {
-                    return;
-                }
-                setTimeout(() => {
-                    this.ajax.get("/gb28181/control", {
-                        id: this.context.id,
-                        channel: this.context.channel,
-                        ptzcmd: ptzCmdStop,
-                    });
-                }, 500)
-            });
+            const ptzCmdStop = Object(ptz_cmd["b" /* getPTZCmd */])({ type: ptz_cmd["a" /* PTZ_TYPE */].stop });
+            this.ajax
+                .get("/gb28181/control", {
+                    id: this.context.id,
+                    channel: this.context.channel,
+                    ptzcmd: ptzCmd,
+                })
+                .then((x) => {
+                    if (
+                        options.type === ptz_cmd["a" /* PTZ_TYPE */].stop ||
+                        options.cycle === true
+                    ) {
+                        return;
+                    }
+                    setTimeout(() => {
+                        this.ajax.get("/gb28181/control", {
+                            id: this.context.id,
+                            channel: this.context.channel,
+                            ptzcmd: ptzCmdStop,
+                        });
+                    }, 500);
+                });
         },
         invite(id, channel, item) {
-            this.ajax.get("/gb28181/invite", {id, channel}).then(x => {
-                item.Connected = true
+            this.ajax.get("/gb28181/invite", { id, channel }).then((x) => {
+                item.Connected = true;
             });
         },
         bye(id, channel, item) {
-            this.ajax.get("/gb28181/bye", {id, channel}).then(x => {
-                item.Connected = false
+            this.ajax.get("/gb28181/bye", { id, channel }).then((x) => {
+                item.Connected = false;
             });
-        }
+        },
     },
 });
 
 // CONCATENATED MODULE: ./src/App.vue?vue&type=script&lang=js&
  /* harmony default export */ var src_Appvue_type_script_lang_js_ = (Appvue_type_script_lang_js_); 
-// EXTERNAL MODULE: ./src/App.vue?vue&type=style&index=0&id=77f8f0e9&scoped=true&lang=css&
-var Appvue_type_style_index_0_id_77f8f0e9_scoped_true_lang_css_ = __webpack_require__("4296");
+// EXTERNAL MODULE: ./src/App.vue?vue&type=style&index=0&id=7bad0327&scoped=true&lang=css&
+var Appvue_type_style_index_0_id_7bad0327_scoped_true_lang_css_ = __webpack_require__("0cd2");
 
 // CONCATENATED MODULE: ./src/App.vue
 
@@ -3137,19 +3083,104 @@ var App_component = normalizeComponent(
   staticRenderFns,
   false,
   null,
-  "77f8f0e9",
+  "7bad0327",
   null
   
 )
 
 /* harmony default export */ var App = (App_component.exports);
-// CONCATENATED MODULE: ./node_modules/@vue/cli-service/lib/commands/build/entry-lib.js
+// CONCATENATED MODULE: C:/Users/dexte/go/src/github.com/Monibuca/plugin-webrtc/ui/node_modules/@vue/cli-service/lib/commands/build/entry-lib.js
 
 
 /* harmony default export */ var entry_lib = __webpack_exports__["default"] = (App);
 
 
 
+/***/ }),
+
+/***/ "df72":
+/***/ (function(module, exports, __webpack_require__) {
+
+// extracted by mini-css-extract-plugin
+
+/***/ }),
+
+/***/ "f3a8":
+/***/ (function(module, exports, __webpack_require__) {
+
+var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_DEFINE_RESULT__;// addapted from the document.currentScript polyfill by Adam Miller
+// MIT license
+// source: https://github.com/amiller-gh/currentScript-polyfill
+
+// added support for Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=1620505
+
+(function (root, factory) {
+  if (true) {
+    !(__WEBPACK_AMD_DEFINE_ARRAY__ = [], __WEBPACK_AMD_DEFINE_FACTORY__ = (factory),
+				__WEBPACK_AMD_DEFINE_RESULT__ = (typeof __WEBPACK_AMD_DEFINE_FACTORY__ === 'function' ?
+				(__WEBPACK_AMD_DEFINE_FACTORY__.apply(exports, __WEBPACK_AMD_DEFINE_ARRAY__)) : __WEBPACK_AMD_DEFINE_FACTORY__),
+				__WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
+  } else {}
+}(typeof self !== 'undefined' ? self : this, function () {
+  function getCurrentScript () {
+    if (document.currentScript) {
+      return document.currentScript
+    }
+  
+    // IE 8-10 support script readyState
+    // IE 11+ & Firefox support stack trace
+    try {
+      throw new Error();
+    }
+    catch (err) {
+      // Find the second match for the "at" string to get file src url from stack.
+      var ieStackRegExp = /.*at [^(]*\((.*):(.+):(.+)\)$/ig,
+        ffStackRegExp = /@([^@]*):(\d+):(\d+)\s*$/ig,
+        stackDetails = ieStackRegExp.exec(err.stack) || ffStackRegExp.exec(err.stack),
+        scriptLocation = (stackDetails && stackDetails[1]) || false,
+        line = (stackDetails && stackDetails[2]) || false,
+        currentLocation = document.location.href.replace(document.location.hash, ''),
+        pageSource,
+        inlineScriptSourceRegExp,
+        inlineScriptSource,
+        scripts = document.getElementsByTagName('script'); // Live NodeList collection
+  
+      if (scriptLocation === currentLocation) {
+        pageSource = document.documentElement.outerHTML;
+        inlineScriptSourceRegExp = new RegExp('(?:[^\\n]+?\\n){0,' + (line - 2) + '}[^<]*<script>([\\d\\D]*?)<\\/script>[\\d\\D]*', 'i');
+        inlineScriptSource = pageSource.replace(inlineScriptSourceRegExp, '$1').trim();
+      }
+  
+      for (var i = 0; i < scripts.length; i++) {
+        // If ready state is interactive, return the script tag
+        if (scripts[i].readyState === 'interactive') {
+          return scripts[i];
+        }
+  
+        // If src matches, return the script tag
+        if (scripts[i].src === scriptLocation) {
+          return scripts[i];
+        }
+  
+        // If inline source matches, return the script tag
+        if (
+          scriptLocation === currentLocation &&
+          scripts[i].innerHTML &&
+          scripts[i].innerHTML.trim() === inlineScriptSource
+        ) {
+          return scripts[i];
+        }
+      }
+  
+      // If no match, return null
+      return null;
+    }
+  };
+
+  return getCurrentScript
+}));
+
+
 /***/ })
 
 /******/ })["default"];
diff --git a/ui/dist/plugin-gb28181.umd.js.map b/ui/dist/plugin-gb28181.umd.js.map
index c173d49..b4fdb82 100644
--- a/ui/dist/plugin-gb28181.umd.js.map
+++ b/ui/dist/plugin-gb28181.umd.js.map
@@ -1 +1 @@
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Length must be a multiple of 4')\n  }\n\n  // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n  var validLen = b64.indexOf('=')\n  if (validLen === -1) validLen = len\n\n  var placeHoldersLen = validLen === len\n    ? 0\n    : 4 - (validLen % 4)\n\n  return [validLen, placeHoldersLen]\n}\n\n// base64 is 4/3 + up to two characters of the original data\nfunction byteLength (b64) {\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction _byteLength (b64, validLen, placeHoldersLen) {\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction toByteArray (b64) {\n  var tmp\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))\n\n  var curByte = 0\n\n  // if there are placeholders, only get up to the last complete 4 chars\n  var len = placeHoldersLen > 0\n    ? validLen - 4\n    : validLen\n\n  var i\n  for (i = 0; i < len; i += 4) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 18) |\n      (revLookup[b64.charCodeAt(i + 1)] << 12) |\n      (revLookup[b64.charCodeAt(i + 2)] << 6) |\n      revLookup[b64.charCodeAt(i + 3)]\n    arr[curByte++] = (tmp >> 16) & 0xFF\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 2) |\n      (revLookup[b64.charCodeAt(i + 1)] >> 4)\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 10) |\n      (revLookup[b64.charCodeAt(i + 1)] << 4) |\n      (revLookup[b64.charCodeAt(i + 2)] >> 2)\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  return arr\n}\n\nfunction tripletToBase64 (num) {\n  return lookup[num >> 18 & 0x3F] +\n    lookup[num >> 12 & 0x3F] +\n    lookup[num >> 6 & 0x3F] +\n    lookup[num & 0x3F]\n}\n\nfunction encodeChunk (uint8, start, end) {\n  var tmp\n  var output = []\n  for (var i = start; i < end; i += 3) {\n    tmp =\n      ((uint8[i] << 16) & 0xFF0000) +\n      ((uint8[i + 1] << 8) & 0xFF00) +\n      (uint8[i + 2] & 0xFF)\n    output.push(tripletToBase64(tmp))\n  }\n  return output.join('')\n}\n\nfunction fromByteArray (uint8) {\n  var tmp\n  var len = uint8.length\n  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes\n  var parts = []\n  var maxChunkLength = 16383 // must be multiple of 3\n\n  // go through the array every three bytes, we'll deal with trailing stuff later\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(\n      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)\n    ))\n  }\n\n  // pad the end with zeros, but make sure to not forget the extra bytes\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 2] +\n      lookup[(tmp << 4) & 0x3F] +\n      '=='\n    )\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 10] +\n      lookup[(tmp >> 4) & 0x3F] +\n      lookup[(tmp << 2) & 0x3F] +\n      '='\n    )\n  }\n\n  return parts.join('')\n}\n","// extracted by mini-css-extract-plugin","export * from \"-!../node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../node_modules/vue-loader/lib/loaders/stylePostLoader.js!../node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../node_modules/cache-loader/dist/cjs.js??ref--0-0!../node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=style&index=0&id=77f8f0e9&scoped=true&lang=css&\"","// addapted from the document.currentScript polyfill by Adam Miller\n// MIT license\n// source: https://github.com/amiller-gh/currentScript-polyfill\n\n// added support for Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=1620505\n\n(function (root, factory) {\n  if (typeof define === 'function' && define.amd) {\n    define([], factory);\n  } else if (typeof module === 'object' && module.exports) {\n    module.exports = factory();\n  } else {\n    root.getCurrentScript = factory();\n  }\n}(typeof self !== 'undefined' ? self : this, function () {\n  function getCurrentScript () {\n    var descriptor = Object.getOwnPropertyDescriptor(document, 'currentScript')\n    // for chrome\n    if (!descriptor && 'currentScript' in document && document.currentScript) {\n      return document.currentScript\n    }\n\n    // for other browsers with native support for currentScript\n    if (descriptor && descriptor.get !== getCurrentScript && document.currentScript) {\n      return document.currentScript\n    }\n  \n    // IE 8-10 support script readyState\n    // IE 11+ & Firefox support stack trace\n    try {\n      throw new Error();\n    }\n    catch (err) {\n      // Find the second match for the \"at\" string to get file src url from stack.\n      var ieStackRegExp = /.*at [^(]*\\((.*):(.+):(.+)\\)$/ig,\n        ffStackRegExp = /@([^@]*):(\\d+):(\\d+)\\s*$/ig,\n        stackDetails = ieStackRegExp.exec(err.stack) || ffStackRegExp.exec(err.stack),\n        scriptLocation = (stackDetails && stackDetails[1]) || false,\n        line = (stackDetails && stackDetails[2]) || false,\n        currentLocation = document.location.href.replace(document.location.hash, ''),\n        pageSource,\n        inlineScriptSourceRegExp,\n        inlineScriptSource,\n        scripts = document.getElementsByTagName('script'); // Live NodeList collection\n  \n      if (scriptLocation === currentLocation) {\n        pageSource = document.documentElement.outerHTML;\n        inlineScriptSourceRegExp = new RegExp('(?:[^\\\\n]+?\\\\n){0,' + (line - 2) + '}[^<]*<script>([\\\\d\\\\D]*?)<\\\\/script>[\\\\d\\\\D]*', 'i');\n        inlineScriptSource = pageSource.replace(inlineScriptSourceRegExp, '$1').trim();\n      }\n  \n      for (var i = 0; i < scripts.length; i++) {\n        // If ready state is interactive, return the script tag\n        if (scripts[i].readyState === 'interactive') {\n          return scripts[i];\n        }\n  \n        // If src matches, return the script tag\n        if (scripts[i].src === scriptLocation) {\n          return scripts[i];\n        }\n  \n        // If inline source matches, return the script tag\n        if (\n          scriptLocation === currentLocation &&\n          scripts[i].innerHTML &&\n          scripts[i].innerHTML.trim() === inlineScriptSource\n        ) {\n          return scripts[i];\n        }\n      }\n  \n      // If no match, return null\n      return null;\n    }\n  };\n\n  return getCurrentScript\n}));\n","/**\n * Date:2020/11/9\n * Desc:\n */\n/**\n * Date:2020/11/2\n * Desc: ptz cmd 封装\n * cmd[0] //首字节以05H开头\n * cmd[1] //组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码\n *        //  校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16\n * cmd[2] //地址的低8位？？？什么地址，地址范围000h ~ FFFh(0~4095),其中000h为广播地址\n * cmd[3] //指令码\n * cmd[4] //数据1,水平控制速度、聚焦速度\n * cmd[5] //数据2，垂直控制速度、光圈速度\n * cmd[6] // 高4位为数据3=变倍控制速度，低4位为地址高4位\n */\n\nconst PTZ_TYPE = {\n    stop: 'stop',\n    right: 'right',\n    left: 'left',\n    up: 'up',\n    down: 'down',\n    leftUp: 'leftUp',\n    leftDown: 'leftDown',\n    rightUp: 'rightUp',\n    rightDown: 'rightDown',\n    zoomFar: 'zoomFar',\n    zoomNear: 'zoomNear',\n    apertureFar: 'apertureFar',\n    apertureNear: 'apertureNear',\n    focusFar: 'focusFar',\n    focusNear: 'focusNear',\n    setPos: 'setPos',\n    calPos: 'calPos',\n    delPos: 'delPos'\n};\n\nconst PTZ_CMD_TYPE = {\n    stop: 0x00,\n\n    right: 0x01,\n    left: 0x02,\n    up: 0x08,\n    down: 0x04,\n\n    leftUp: 0x0A,\n    leftDown: 0x06,\n    rightUp: 0x09,\n    rightDown: 0x05,\n\n    zoomFar: 0x10, // 镜头 放大\n    zoomNear: 0x20,  // 镜头 缩小\n\n    apertureFar: 0x48, // 光圈 缩小\n    apertureNear: 0x44, // 光圈 放大\n\n    focusFar: 0x42, // 聚焦 近\n    focusNear: 0x41, // 聚焦 远\n\n    setPos: 0x81,\n    calPos: 0x82,\n    delPos: 0x83\n};\n\nconst SPEED_ARRAY = [0x19, 0x32, 0x4b, 0x64, 0x7d, 0x96, 0xAF, 0xC8, 0xE1, 0xFA];\nconst POSITION_ARRAY = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10];\n\n// 获取 direction 方向型\n/**\n *\n * @param options\n *        type:\n *        speed:default 5\n *        index:\n * @returns {string}\n */\nfunction getPTZCmd(options) {\n    const {type, speed, index} = options;\n    const ptzSpeed = getPTZSpeed(speed);\n    let indexValue3, indexValue4, indexValue5, indexValue6;\n    indexValue3 = PTZ_CMD_TYPE[type];\n    switch (type) {\n        case PTZ_TYPE.up:\n        case PTZ_TYPE.down:\n        case PTZ_TYPE.apertureFar:\n        case PTZ_TYPE.apertureNear:\n            indexValue5 = ptzSpeed;\n            break;\n        case PTZ_TYPE.right:\n        case PTZ_TYPE.left:\n        case PTZ_TYPE.focusFar:\n        case PTZ_TYPE.focusNear:\n            indexValue4 = ptzSpeed;\n            break;\n        case PTZ_TYPE.leftUp:\n        case PTZ_TYPE.leftDown:\n        case PTZ_TYPE.rightUp:\n        case PTZ_TYPE.rightDown:\n            indexValue4 = ptzSpeed;\n            indexValue5 = ptzSpeed;\n            break;\n        case PTZ_TYPE.zoomFar:\n        case PTZ_TYPE.zoomNear:\n            indexValue6 = 0x10;\n            break;\n        case PTZ_TYPE.calPos:\n        case PTZ_TYPE.delPos:\n        case PTZ_TYPE.setPos:\n            indexValue5 = getPTZPositionIndex(index);\n            break;\n        default:\n            break;\n    }\n    return ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6);\n}\n\nfunction getPTZSpeed(speed) {\n    speed = speed || 5;\n    const speedIndex = speed - 1;\n    const ptzSpeed = SPEED_ARRAY[speedIndex] || SPEED_ARRAY[4];\n    return ptzSpeed;\n}\n\nfunction getPTZPositionIndex(index) {\n    return POSITION_ARRAY[index - 1];\n}\n\nfunction ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6) {\n    //\n    let cmd = Buffer.alloc(8);\n    // 首字节以05H开头\n    cmd[0] = 0xA5;\n    // 组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码\n    cmd[1] = 0x0F;\n    // 校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16\n    cmd[2] = 0x01;\n    //\n    if (indexValue3) {\n        cmd[3] = indexValue3;\n    }\n    if (indexValue4) {\n        cmd[4] = indexValue4;\n    }\n    if (indexValue5) {\n        cmd[5] = indexValue5;\n    }\n    if (indexValue6) {\n        cmd[6] = indexValue6;\n    }\n\n    cmd[7] = (cmd[0] + cmd[1] + cmd[2] + cmd[3] + cmd[4] + cmd[5] + cmd[6]) % 256;\n\n    return bytes2HexString(cmd);\n}\n\nfunction bytes2HexString(byte) {\n    let hexs = \"\";\n    for (let i = 0; i < byte.length; i++) {\n        let hex = (byte[i]).toString(16);\n        if (hex.length === 1) {\n            hex = '0' + hex;\n        }\n        hexs += hex.toUpperCase();\n    }\n    return hexs;\n}\n\nexport {\n    getPTZCmd,\n    PTZ_TYPE\n}\n","/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */\nexports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = ((value * c) - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\n/*\n * Export kMaxLength after typed array support is determined.\n */\nexports.kMaxLength = kMaxLength()\n\nfunction typedArraySupport () {\n  try {\n    var arr = new Uint8Array(1)\n    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}\n    return arr.foo() === 42 && // typed array instances can be augmented\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\nfunction createBuffer (that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length')\n  }\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length)\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length)\n    }\n    that.length = length\n  }\n\n  return that\n}\n\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\nfunction Buffer (arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length)\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error(\n        'If encoding is specified then the first argument must be a string'\n      )\n    }\n    return allocUnsafe(this, arg)\n  }\n  return from(this, arg, encodingOrOffset, length)\n}\n\nBuffer.poolSize = 8192 // not used by this implementation\n\n// TODO: Legacy, not needed anymore. Remove in next major version.\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype\n  return arr\n}\n\nfunction from (that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length)\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset)\n  }\n\n  return fromObject(that, value)\n}\n\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length)\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n  if (typeof Symbol !== 'undefined' && Symbol.species &&\n      Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    })\n  }\n}\n\nfunction assertSize (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number')\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative')\n  }\n}\n\nfunction alloc (that, size, fill, encoding) {\n  assertSize(size)\n  if (size <= 0) {\n    return createBuffer(that, size)\n  }\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string'\n      ? createBuffer(that, size).fill(fill, encoding)\n      : createBuffer(that, size).fill(fill)\n  }\n  return createBuffer(that, size)\n}\n\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding)\n}\n\nfunction allocUnsafe (that, size) {\n  assertSize(size)\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size)\n}\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size)\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8'\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding')\n  }\n\n  var length = byteLength(string, encoding) | 0\n  that = createBuffer(that, length)\n\n  var actual = that.write(string, encoding)\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual)\n  }\n\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0\n  that = createBuffer(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array, byteOffset, length) {\n  array.byteLength // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds')\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds')\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array)\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset)\n  } else {\n    array = new Uint8Array(array, byteOffset, length)\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array)\n  }\n  return that\n}\n\nfunction fromObject (that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0\n    that = createBuffer(that, len)\n\n    if (that.length === 0) {\n      return that\n    }\n\n    obj.copy(that, 0, 0, len)\n    return that\n  }\n\n  if (obj) {\n    if ((typeof ArrayBuffer !== 'undefined' &&\n        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0)\n      }\n      return fromArrayLike(that, obj)\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data)\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (length) {\n  if (+length != length) { // eslint-disable-line eqeqeq\n    length = 0\n  }\n  return Buffer.alloc(+length)\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i]\n      y = b[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers')\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length)\n  var pos = 0\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i]\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers')\n    }\n    buf.copy(buffer, pos)\n    pos += buf.length\n  }\n  return buffer\n}\n\nfunction byteLength (string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length\n  }\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&\n      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength\n  }\n  if (typeof string !== 'string') {\n    string = '' + string\n  }\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n  if (start === undefined || start < 0) {\n    start = 0\n  }\n  // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n  if (start > this.length) {\n    return ''\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length\n  }\n\n  if (end <= 0) {\n    return ''\n  }\n\n  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n  end >>>= 0\n  start >>>= 0\n\n  if (end <= start) {\n    return ''\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\n// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\nBuffer.prototype._isBuffer = true\n\nfunction swap (b, n, m) {\n  var i = b[n]\n  b[n] = b[m]\n  b[m] = i\n}\n\nBuffer.prototype.swap16 = function swap16 () {\n  var len = this.length\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits')\n  }\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1)\n  }\n  return this\n}\n\nBuffer.prototype.swap32 = function swap32 () {\n  var len = this.length\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits')\n  }\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3)\n    swap(this, i + 1, i + 2)\n  }\n  return this\n}\n\nBuffer.prototype.swap64 = function swap64 () {\n  var len = this.length\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits')\n  }\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7)\n    swap(this, i + 1, i + 6)\n    swap(this, i + 2, i + 5)\n    swap(this, i + 3, i + 4)\n  }\n  return this\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer')\n  }\n\n  if (start === undefined) {\n    start = 0\n  }\n  if (end === undefined) {\n    end = target ? target.length : 0\n  }\n  if (thisStart === undefined) {\n    thisStart = 0\n  }\n  if (thisEnd === undefined) {\n    thisEnd = this.length\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index')\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0\n  }\n  if (thisStart >= thisEnd) {\n    return -1\n  }\n  if (start >= end) {\n    return 1\n  }\n\n  start >>>= 0\n  end >>>= 0\n  thisStart >>>= 0\n  thisEnd >>>= 0\n\n  if (this === target) return 0\n\n  var x = thisEnd - thisStart\n  var y = end - start\n  var len = Math.min(x, y)\n\n  var thisCopy = this.slice(thisStart, thisEnd)\n  var targetCopy = target.slice(start, end)\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i]\n      y = targetCopy[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\n// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\nfunction bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1\n\n  // Normalize byteOffset\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset\n    byteOffset = 0\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000\n  }\n  byteOffset = +byteOffset  // Coerce to Number.\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : (buffer.length - 1)\n  }\n\n  // Normalize byteOffset: negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1\n    else byteOffset = buffer.length - 1\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0\n    else return -1\n  }\n\n  // Normalize val\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding)\n  }\n\n  // Finally, search either indexOf (if dir is true) or lastIndexOf\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1\n    }\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)\n  } else if (typeof val === 'number') {\n    val = val & 0xFF // Search for a byte value [0-255]\n    if (Buffer.TYPED_ARRAY_SUPPORT &&\n        typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)\n      }\n    }\n    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\nfunction arrayIndexOf (arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1\n  var arrLength = arr.length\n  var valLength = val.length\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase()\n    if (encoding === 'ucs2' || encoding === 'ucs-2' ||\n        encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1\n      }\n      indexSize = 2\n      arrLength /= 2\n      valLength /= 2\n      byteOffset /= 2\n    }\n  }\n\n  function read (buf, i) {\n    if (indexSize === 1) {\n      return buf[i]\n    } else {\n      return buf.readUInt16BE(i * indexSize)\n    }\n  }\n\n  var i\n  if (dir) {\n    var foundIndex = -1\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex\n        foundIndex = -1\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false\n          break\n        }\n      }\n      if (found) return i\n    }\n  }\n\n  return -1\n}\n\nBuffer.prototype.includes = function includes (val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)\n}\n\nBuffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) return i\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction latin1Write (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    throw new Error(\n      'Buffer.write(string, encoding, offset[, length]) is no longer supported'\n    )\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction latin1Slice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end)\n    newBuf.__proto__ = Buffer.prototype\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n  if (offset < 0) throw new RangeError('Index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    Uint8Array.prototype.set.call(\n      target,\n      this.subarray(start, start + len),\n      targetStart\n    )\n  }\n\n  return len\n}\n\n// Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\nBuffer.prototype.fill = function fill (val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start\n      start = 0\n      end = this.length\n    } else if (typeof end === 'string') {\n      encoding = end\n      end = this.length\n    }\n    if (val.length === 1) {\n      var code = val.charCodeAt(0)\n      if (code < 256) {\n        val = code\n      }\n    }\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string')\n    }\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding)\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255\n  }\n\n  // Invalid ranges are not set to a default, so can range check early.\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index')\n  }\n\n  if (end <= start) {\n    return this\n  }\n\n  start = start >>> 0\n  end = end === undefined ? this.length : end >>> 0\n\n  if (!val) val = 0\n\n  var i\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val)\n      ? val\n      : utf8ToBytes(new Buffer(val, encoding).toString())\n    var len = bytes.length\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    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_vm.ptzCmd(_vm.ptzType.focusNear)}}},[_c('path',{attrs:{\"d\":\"M512 170.666667A341.333333 341.333333 0 1 1 170.666667 512 341.333333 341.333333 0 0 1 512 170.666667m0-42.666667a384 384 0 1 0 384 384A384 384 0 0 0 512 128z\"}}),_c('path',{attrs:{\"fill\":\"#333333\",\"d\":\"M298.666667 533.333333H170.666667a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM853.333333 533.333333h-128a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM512 320a21.333333 21.333333 0 0 1-21.333333-21.333333V170.666667a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333333zM512 874.666667a21.333333 21.333333 0 0 1-21.333333-21.333334v-128a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333334z\"}})])]),_c('div',{staticClass:\"control5\"},[_c('i-select',{staticStyle:{\"width\":\"100px\"},model:{value:(_vm.ptzPositionIndex),callback:function ($$v) {_vm.ptzPositionIndex=$$v},expression:\"ptzPositionIndex\"}},_vm._l((10),function(n){return _c('Option',{key:n,attrs:{\"value\":n}},[_vm._v(\"预置点\"+_vm._s(n))])}),1),_c('i-button',{attrs:{\"type\":\"primary\"},on:{\"click\":function($event){return _vm.ptzCmd(_vm.ptzType.setPos)}}},[_vm._v(\"设置\")]),_c('i-button',{attrs:{\"type\":\"success\"},on:{\"click\":function($event){return _vm.ptzCmd(_vm.ptzType.calPos)}}},[_vm._v(\"调用\")]),_c('i-button',{attrs:{\"type\":\"error\"},on:{\"click\":function($event){return _vm.ptzCmd(_vm.ptzType.delPos)}}},[_vm._v(\"删除\")]),_vm._v(\" 速度： \"),_c('InputNumber',{attrs:{\"max\":10,\"min\":1},model:{value:(_vm.ptzSpeed),callback:function ($$v) {_vm.ptzSpeed=$$v},expression:\"ptzSpeed\"}})],1)]),_c('div',{attrs:{\"slot\":\"footer\"},slot:\"footer\"},[(_vm.remoteSDP)?_c('mu-badge',[_c('a',{attrs:{\"slot\":\"content\",\"href\":_vm.remoteSDPURL,\"download\":\"remoteSDP.txt\"},slot:\"content\"},[_vm._v(\"remoteSDP\")])]):_vm._e(),(_vm.localSDP)?_c('mu-badge',[_c('a',{attrs:{\"slot\":\"content\",\"href\":_vm.localSDPURL,\"download\":\"localSDP.txt\"},slot:\"content\"},[_vm._v(\"localSDP\")])]):_vm._e()],1)])}\nvar staticRenderFns = []\n\nexport { render, staticRenderFns }","<template>\n  <Modal\n    v-bind=\"$attrs\"\n    draggable\n    width=\"750\"\n    v-on=\"$listeners\"\n    :title=\"streamPath\"\n    @on-ok=\"onClosePreview\"\n    @on-cancel=\"onClosePreview\"\n  >\n    <div class=\"container\">\n      <video ref=\"webrtc\" :srcObject.prop=\"stream\" width=\"488\" height=\"275\" autoplay muted controls></video>\n      <div class=\"control\">\n        <svg v-for=\"n in 8\" @click=\"ptzCmdDirection(n)\" :class=\"'arrow'+n\" viewBox=\"0 0 1024 1024\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"64\" height=\"64\"><defs><style type=\"text/css\"></style></defs><path d=\"M682.666667 955.733333H341.333333a17.066667 17.066667 0 0 1-17.066666-17.066666V529.066667H85.333333a17.066667 17.066667 0 0 1-12.066133-29.1328l426.666667-426.666667a17.0496 17.0496 0 0 1 24.132266 0l426.666667 426.666667A17.066667 17.066667 0 0 1 938.666667 529.066667H699.733333v409.6a17.066667 17.066667 0 0 1-17.066666 17.066666z m-324.266667-34.133333h307.2V512a17.066667 17.066667 0 0 1 17.066667-17.066667h214.801066L512 109.4656 126.532267 494.933333H341.333333a17.066667 17.066667 0 0 1 17.066667 17.066667v409.6z\" p-id=\"6849\"></path></svg>\n        <svg @mousedown=\"startPtzCmdCycle\" @mouseup=\"stopPtzCmdCycle\" class=\"arrow9\" viewBox=\"0 0 1024 1024\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\"><path d=\"M512 960c-210.96 0-395.36-149.68-438.47-355.91-2.98-14.24 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@click=\"ptzCmd(ptzType.zoomNear)\" viewBox=\"0 0 1024 1024\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\"><path d=\"M994.990643 859.352971L713.884166 578.246494A381.208198 381.208198 0 0 0 767.307984 383.653992C767.307984 171.765089 595.542895 0 383.653992 0S0 171.765089 0 383.653992s171.765089 383.653992 383.653992 383.653992c71.119859 0 137.507985-19.694238 194.592502-53.423818l281.106477 281.090491a95.913498 95.913498 0 1 0 135.637672-135.621686zM383.653992 671.394486c-158.912681 0-287.740494-128.827813-287.740494-287.740494S224.741311 95.913498 383.653992 95.913498s287.740494 128.827813 287.740494 287.740494-128.827813 287.740494-287.740494 287.740494z m159.85583-335.697243H223.798162a47.956749 47.956749 0 1 0 0 95.913498h319.71166a47.956749 47.956749 0 1 0 0-95.913498z\"  /></svg>\n      </div>\n      <div class=\"control control3\">\n        <svg @click=\"ptzCmd(ptzType.apertureFar)\" viewBox=\"0 0 1024 1024\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\"><path 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341.333333 0 0 1 512 170.666667m0-42.666667a384 384 0 1 0 384 384A384 384 0 0 0 512 128z\"  /><path fill=\"#333333\" d=\"M298.666667 533.333333H170.666667a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM853.333333 533.333333h-128a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM512 320a21.333333 21.333333 0 0 1-21.333333-21.333333V170.666667a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333333zM512 874.666667a21.333333 21.333333 0 0 1-21.333333-21.333334v-128a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333334z\"  /></svg>\n      </div>\n      <div class=\"control5\">\n        <i-select v-model=\"ptzPositionIndex\" style=\"width: 100px\">\n          <Option v-for=\"n in 10\" :value=\"n\" :key=\"n\">预置点{{n}}</Option>\n        </i-select>\n        <i-button type=\"primary\" @click=\"ptzCmd(ptzType.setPos)\">设置</i-button>\n        <i-button type=\"success\" @click=\"ptzCmd(ptzType.calPos)\">调用</i-button>\n        <i-button type=\"error\" @click=\"ptzCmd(ptzType.delPos)\">删除</i-button>\n        速度：\n        <InputNumber :max=\"10\" :min=\"1\" v-model=\"ptzSpeed\"></InputNumber>\n      </div>\n    </div>\n    <div slot=\"footer\">\n      <mu-badge v-if=\"remoteSDP\">\n        <a slot=\"content\" :href=\"remoteSDPURL\" download=\"remoteSDP.txt\">remoteSDP</a>\n      </mu-badge>\n      <mu-badge v-if=\"localSDP\">\n        <a slot=\"content\" :href=\"localSDPURL\" download=\"localSDP.txt\">localSDP</a>\n      </mu-badge>\n    </div>\n  </Modal>\n</template>\n<script>\n  import {PTZ_TYPE} from \"../utils/ptz-cmd\";\n  const PTZ_DIRECTION_ARRAY = [PTZ_TYPE.up,PTZ_TYPE.right,PTZ_TYPE.down,PTZ_TYPE.left,PTZ_TYPE.leftUp,PTZ_TYPE.rightUp,PTZ_TYPE.leftDown,PTZ_TYPE.rightDown];\n  let pc = null;\nexport default {\n  data() {\n    return {\n      iceConnectionState: pc && pc.iceConnectionState,\n      stream: null,\n      localSDP: \"\",\n      remoteSDP: \"\",\n      remoteSDPURL: \"\",\n      localSDPURL: \"\",\n      streamPath: \"\",\n      ptzSpeed:5,\n      ptzPositionIndex:1,\n      ptzType:PTZ_TYPE,\n    };\n  },\n  props:{\n    PublicIP:String\n  },\n    methods: {\n        async play(streamPath) {\n            pc = new RTCPeerConnection();\n            pc.addTransceiver('video',{\n              direction:'recvonly'\n            })\n            this.streamPath = streamPath;\n            pc.onsignalingstatechange = e => {\n                //console.log(e);\n            };\n            pc.oniceconnectionstatechange = e => {\n                this.$toast.info(pc.iceConnectionState);\n                this.iceConnectionState = pc.iceConnectionState;\n            };\n            pc.onicecandidate = event => {\n                console.log(event)\n            };\n            pc.ontrack = event => {\n               // console.log(event);\n                if (event.track.kind == \"video\")\n                    this.stream = event.streams[0];\n            };\n            await pc.setLocalDescription(await pc.createOffer());\n            this.localSDP = pc.localDescription.sdp;\n            this.localSDPURL = URL.createObjectURL(\n                new Blob([this.localSDP], { type: \"text/plain\" })\n            );\n            const result = await this.ajax({\n                type: \"POST\",\n                processData: false,\n                data: JSON.stringify(pc.localDescription.toJSON()),\n                url: \"/webrtc/play?streamPath=\" + this.streamPath,\n                dataType: \"json\"\n            });\n            if (result.errmsg) {\n                this.$toast.error(result.errmsg);\n                return;\n            } else {\n                this.remoteSDP = result.sdp;\n                this.remoteSDPURL = URL.createObjectURL(new Blob([this.remoteSDP], { type: \"text/plain\" }));\n            }\n            await pc.setRemoteDescription(new RTCSessionDescription(result));\n        },\n        ptzCmdDirection(direction){\n          const type = PTZ_DIRECTION_ARRAY[direction-1];\n          this.ptzCmd(type);\n        },\n        startPtzCmdCycle(){\n          this.ptzCmd(PTZ_TYPE.right,true);\n        },\n        stopPtzCmdCycle(){\n          this.ptzCmd(PTZ_TYPE.stop);\n        },\n        ptzCmd(type,isCycling){\n          this.$emit('ptz',{type:type,speed:this.ptzSpeed,index:this.ptzPositionIndex,cycle:isCycling})\n        },\n        onClosePreview() {\n            pc.close();\n        }\n    }\n};\n</script>\n<style scoped>\n  .arrow1{\n    grid-column: 2;\n    grid-row: 1;\n  }\n  .arrow2{\n    transform: rotate(90deg);\n    grid-column: 3;\n    grid-row: 2;\n  }\n  .arrow3{\n    transform: rotate(180deg);\n    grid-column: 2;\n    grid-row: 3;\n  }\n  .arrow4{\n    transform: rotate(270deg);\n    grid-column: 1;\n    grid-row: 2;\n  }\n\n  .arrow5{\n    transform: rotate(-45deg);\n    grid-column: 1;\n    grid-row: 1;\n  }\n\n  .arrow6{\n    transform: rotate(45deg);\n    grid-column: 3;\n    grid-row: 1;\n  }\n\n  .arrow7{\n    transform: rotate(-135deg);\n    grid-column: 1;\n    grid-row: 3;\n  }\n\n  .arrow8{\n    transform: rotate(135deg);\n    grid-column: 3;\n    grid-row: 3;\n  }\n\n  .arrow9{\n    grid-column: 2;\n    grid-row: 2;\n  }\n\n.container {\n  position: relative;\n  height: 350px;\n}\n.control {\n  position: absolute;\n  top: 20px;\n  right: 0;\n  display: grid;\n  grid-template-columns: repeat(3, 33.33%);\n  grid-template-rows: repeat(3, 33.33%);\n  width: 192px;\n  height: 192px;\n}\n\n.control2{\n  top: 210px;\n}\n\n.control3{\n  top: 260px;\n}\n\n.control4{\n  top: 310px;\n}\n\n.control5{\n  top: 360px;\n}\n\n.control >* {\n  cursor: pointer;\n  fill: gray;\n  width: 50px;\n  height: 50px;\n}\n\n.control5 >*{\n  margin-right: 10px;\n}\n\n.control2 >*,.control3 >*,.control4 >*{\n  width: 40px;\n  height: 40px;\n}\n\n.control >*:hover,.cycling{\n  fill: cyan\n}\n\n\n\n</style>\n","import mod from \"-!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=script&lang=js&\"","/* globals __VUE_SSR_CONTEXT__ */\n\n// IMPORTANT: Do NOT use ES2015 features in this file (except for modules).\n// This module is a runtime utility for cleaner component module output and will\n// be included in the final webpack user bundle.\n\nexport default function normalizeComponent (\n  scriptExports,\n  render,\n  staticRenderFns,\n  functionalTemplate,\n  injectStyles,\n  scopeId,\n  moduleIdentifier, /* server only */\n  shadowMode /* vue-cli only */\n) {\n  // Vue.extend constructor export interop\n  var options = typeof scriptExports === 'function'\n    ? scriptExports.options\n    : scriptExports\n\n  // render functions\n  if (render) {\n    options.render = render\n    options.staticRenderFns = staticRenderFns\n    options._compiled = true\n  }\n\n  // functional template\n  if (functionalTemplate) {\n    options.functional = true\n  }\n\n  // scopedId\n  if (scopeId) {\n    options._scopeId = 'data-v-' + scopeId\n  }\n\n  var hook\n  if (moduleIdentifier) { // server build\n    hook = function (context) {\n      // 2.3 injection\n      context =\n        context || // cached call\n        (this.$vnode && this.$vnode.ssrContext) || // stateful\n        (this.parent && this.parent.$vnode && this.parent.$vnode.ssrContext) // functional\n      // 2.2 with runInNewContext: true\n      if (!context && typeof __VUE_SSR_CONTEXT__ !== 'undefined') {\n        context = __VUE_SSR_CONTEXT__\n      }\n      // inject component styles\n      if (injectStyles) {\n        injectStyles.call(this, context)\n      }\n      // register component module identifier for async chunk inferrence\n      if (context && context._registeredComponents) {\n        context._registeredComponents.add(moduleIdentifier)\n      }\n    }\n    // used by ssr in case component is cached and beforeCreate\n    // never gets called\n    options._ssrRegister = hook\n  } else if (injectStyles) {\n    hook = shadowMode\n      ? function () {\n        injectStyles.call(\n          this,\n          (options.functional ? this.parent : this).$root.$options.shadowRoot\n        )\n      }\n      : injectStyles\n  }\n\n  if (hook) {\n    if (options.functional) {\n      // for template-only hot-reload because in that case the render fn doesn't\n      // go through the normalizer\n      options._injectStyles = hook\n      // register for functional component in vue file\n      var originalRender = options.render\n      options.render = function renderWithStyleInjection (h, context) {\n        hook.call(context)\n        return originalRender(h, context)\n      }\n    } else {\n      // inject component registration as beforeCreate hook\n      var existing = options.beforeCreate\n      options.beforeCreate = existing\n        ? [].concat(existing, hook)\n        : [hook]\n    }\n  }\n\n  return {\n    exports: scriptExports,\n    options: options\n  }\n}\n","import { render, staticRenderFns } from \"./Player.vue?vue&type=template&id=76558468&scoped=true&\"\nimport script from \"./Player.vue?vue&type=script&lang=js&\"\nexport * from \"./Player.vue?vue&type=script&lang=js&\"\nimport style0 from \"./Player.vue?vue&type=style&index=0&id=76558468&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"76558468\",\n  null\n  \n)\n\nexport default component.exports","var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',{staticClass:\"player-wrap\"},[(_vm.rtcStream)?[_c('video',{attrs:{\"autoplay\":\"\",\"muted\":\"\",\"controls\":\"\"},domProps:{\"srcObject\":_vm.rtcStream,\"muted\":true}})]:_vm._e()],2)}\nvar staticRenderFns = []\n\nexport { render, staticRenderFns }","<template>\n    <div class=\"player-wrap\">\n        <template v-if=\"rtcStream\">\n            <video :srcObject.prop=\"rtcStream\" autoplay muted controls></video>\n        </template>\n    </div>\n</template>\n\n<script>\n    export default {\n        name: \"WebrtcPlayer\",\n        rtcPeerConnection: null,\n        data() {\n            return {\n                iceConnectionState: '',\n                rtcPeerConnectionInit: false,\n                rtcStream: null\n            }\n        },\n        props: {\n            streamPath: {\n                type: String,\n                default: ''\n            }\n        },\n        async created() {\n            await this.initRtcPeerConnection();\n            console.log('initRtcPeerConnectioned');\n            if (this.streamPath) {\n                await this.play(this.streamPath);\n                console.log('played');\n            }\n        },\n        methods: {\n            async initRtcPeerConnection() {\n                const rtcPeerConnection = new RTCPeerConnection();\n\n                rtcPeerConnection.addTransceiver('video', {\n                    direction: \"recvonly\"\n                });\n\n                rtcPeerConnection.onsignalingstatechange = e => {\n                    console.log('onsignalingstatechange', e);\n                };\n\n                rtcPeerConnection.oniceconnectionstatechange = e => {\n                    console.log('oniceconnectionstatechange', rtcPeerConnection.iceConnectionState);\n                };\n\n                rtcPeerConnection.onicecandidate = event => {\n                    console.log('onicecandidate', event);\n                };\n\n                rtcPeerConnection.ontrack = event => {\n                    console.log('ontrack', event);\n                    if (event.track.kind === \"video\") {\n                        this.rtcStream = event.streams[0];\n                    }\n                };\n\n                const rtcSessionDescriptionInit = await rtcPeerConnection.createOffer();\n                await rtcPeerConnection.setLocalDescription(rtcSessionDescriptionInit);\n                this.rtcPeerConnectionInit = true;\n                this.$options.rtcPeerConnection = rtcPeerConnection;\n            },\n\n            //\n            async play(streamPath) {\n                const rtcPeerConnection = this.$options.rtcPeerConnection;\n                const localDescriptionData = rtcPeerConnection.localDescription.toJSON();\n                const result = await this.ajax({\n                    type: \"POST\",\n                    processData: false,\n                    data: localDescriptionData,\n                    url: \"/webrtc/play?streamPath=\" + streamPath,\n                    dataType: \"json\"\n                });\n                if (result.error) {\n                    return;\n                }\n                //\n                rtcPeerConnection.setRemoteDescription(new RTCSessionDescription({\n                    type: result.type,\n                    sdp: result.sdp\n                }));\n            },\n            close() {\n                const rtcPeerConnection = this.$options.rtcPeerConnection;\n                rtcPeerConnection && rtcPeerConnection.close();\n            }\n        },\n        destroyed() {\n            this.close();\n        }\n    }\n</script>\n\n<style scoped>\n    .player-wrap {\n        width: 100%;\n        height: 100%;\n    }\n\n    .player-wrap video {\n        width: 100%;\n        height: 100%;\n    }\n</style>\n","import mod from \"-!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=script&lang=js&\"","import { render, staticRenderFns } from \"./Player2.vue?vue&type=template&id=379ce7fe&scoped=true&\"\nimport script from \"./Player2.vue?vue&type=script&lang=js&\"\nexport * from \"./Player2.vue?vue&type=script&lang=js&\"\nimport style0 from \"./Player2.vue?vue&type=style&index=0&id=379ce7fe&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"379ce7fe\",\n  null\n  \n)\n\nexport default component.exports","<template>\n    <div>\n        <div class=\"tabpanel\" v-if=\"$parent.titleTabActive === 0\">\n            <mu-data-table :data=\"Devices\" :columns=\"columns\">\n                <template #expand=\"prop\">\n                    <mu-data-table :data=\"prop.row.Channels\" :columns=\"columns2\">\n                        <template #default=\"{ row: item, $index }\">\n                            <td>{{ item.DeviceID }}</td>\n                            <td>{{ item.Name }}</td>\n                            <td>{{ item.Manufacturer }}</td>\n                            <td>{{ item.Address }}</td>\n                            <td>{{ item.Status }}</td>\n                            <td>\n                                <mu-button flat v-if=\"item.Connected\" @click=\"ptz(prop.row.ID, $index,item)\">云台\n                                </mu-button>\n                                <mu-button flat v-if=\"item.Connected\" @click=\"bye(prop.row.ID, $index)\">断开</mu-button>\n                                <mu-button v-else flat @click=\"invite(prop.row.ID, $index,item)\"\n                                >连接\n                                </mu-button\n                                >\n                            </td>\n                        </template>\n                    </mu-data-table>\n                </template>\n                <template #default=\"{ row: item }\">\n                    <td>{{ item.ID }}</td>\n                    <td>{{ item.Channels ? item.Channels.length : 0 }}</td>\n                    <td>\n                        <StartTime :value=\"item.RegisterTime\"></StartTime>\n                    </td>\n                    <td>\n                        <StartTime :value=\"item.UpdateTime\"></StartTime>\n                    </td>\n                    <td>{{ item.Status }}</td>\n                </template>\n            </mu-data-table>\n        </div>\n        <div class=\"tabpanel\" v-if=\"$parent.titleTabActive === 1\">\n            <div class=\"search\">\n            <i-select v-model=\"channelSelectedList\" multiple>\n              <Option v-for=\"(channel,index) in channelList\"\n                      :value=\"channel\"\n                      :label=\"channel.DeviceID + '(' + channel.Name + ')'\"\n                      :key=\"index\">\n              </Option>\n            </i-select>\n            </div>\n            <div class=\"flex-box\">\n                <template v-for=\"(channel,index) in channelSelectedList\">\n                    <div class=\"flex-item\" :key=\"index\" v-if=\"channel.ID\">\n                        <webrtc-player2 :stream-path=\"'gb28181/'+channel.ID\"></webrtc-player2>\n                    </div>\n                </template>\n            </div>\n        </div>\n        <webrtc-player ref=\"player\" @ptz=\"sendPtz\" v-model=\"previewStreamPath\" :PublicIP=\"PublicIP\"></webrtc-player>\n    </div>\n</template>\n<script>\n    import WebrtcPlayer from \"./components/Player\"\n    import WebrtcPlayer2 from \"./components/Player2\";\n    import {getPTZCmd, PTZ_TYPE} from \"./utils/ptz-cmd\";\n\n    export default {\n        components: {\n            WebrtcPlayer,\n            WebrtcPlayer2\n        },\n        props: {\n            ListenAddr: String\n        },\n        computed: {\n            PublicIP() {\n                return this.ListenAddr.split(\":\")[0]\n            }\n        },\n        data() {\n            return {\n                Devices: [], previewStreamPath: false,\n                channelList: [],\n                channelSelectedList:[],\n                context: {\n                    id: null,\n                    channel: 0,\n                    item: null\n                },\n                columns: Object.freeze(\n                    [\"设备号\", \"通道数\", \"注册时间\", \"更新时间\", \"状态\"].map(\n                        (title) => ({\n                            title,\n                        })\n                    )\n                ),\n                columns2: Object.freeze([\n                    \"通道编号\",\n                    \"名称\",\n                    \"厂商\",\n                    \"地址\",\n                    \"状态\",\n                    \"操作\",\n                ]).map((title) => ({title})),\n            };\n        },\n        created() {\n            this.fetchlist();\n        },\n        mounted() {\n            this.$parent.titleTabs = [\"列表\", \"N路播放\"];\n        },\n        methods: {\n            fetchlist() {\n                const listES = new EventSource(this.apiHost + \"/gb28181/list\");\n                listES.onmessage = (evt) => {\n                    if (!evt.data) return;\n                    this.Devices = JSON.parse(evt.data) || [];\n                    this.Devices.sort((a, b) => (a.ID > b.ID ? 1 : -1));\n                    let channelList =[]\n                    this.Devices.forEach((device)=>{\n                      const channels = device.Channels || [];\n                      if(channels.length > 0){\n                          channelList = channelList.concat(channels);\n                      }\n                    });\n                    if(channelList.length > 0){\n                        this.channelList = channelList;\n                    }\n                };\n                this.$once(\"hook:destroyed\", () => listES.close());\n            },\n            ptz(id, channel, item) {\n                this.context = {\n                    id, channel, item\n                };\n                this.previewStreamPath = true\n                this.$nextTick(() => this.$refs.player.play(\"gb28181/\" + item.DeviceID));\n            },\n            sendPtz(options) {\n                const ptzCmd = getPTZCmd(options);\n                const ptzCmdStop = getPTZCmd({type: PTZ_TYPE.stop});\n                this.ajax.get(\"/gb28181/control\", {\n                    id: this.context.id,\n                    channel: this.context.channel,\n                    ptzcmd: ptzCmd,\n                }).then(x => {\n                    if (options.type === PTZ_TYPE.stop || options.cycle === true) {\n                        return;\n                    }\n                    setTimeout(() => {\n                        this.ajax.get(\"/gb28181/control\", {\n                            id: this.context.id,\n                            channel: this.context.channel,\n                            ptzcmd: ptzCmdStop,\n                        });\n                    }, 500)\n                });\n            },\n            invite(id, channel, item) {\n                this.ajax.get(\"/gb28181/invite\", {id, channel}).then(x => {\n                    item.Connected = true\n                });\n            },\n            bye(id, channel, item) {\n                this.ajax.get(\"/gb28181/bye\", {id, channel}).then(x => {\n                    item.Connected = false\n                });\n            }\n        },\n    };\n</script>\n<style scoped>\n    .flex-box {\n        display: flex;\n        flex-flow: row wrap;\n        align-content: flex-start;\n    }\n\n    .flex-item {\n        flex: 0 0 33.3333%;\n        height: 275px;\n        padding: 10px;\n    }\n</style>\n","import mod from \"-!../node_modules/cache-loader/dist/cjs.js??ref--0-0!../node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../node_modules/cache-loader/dist/cjs.js??ref--0-0!../node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=script&lang=js&\"","import { render, staticRenderFns } from \"./App.vue?vue&type=template&id=77f8f0e9&scoped=true&\"\nimport script from \"./App.vue?vue&type=script&lang=js&\"\nexport * from \"./App.vue?vue&type=script&lang=js&\"\nimport style0 from \"./App.vue?vue&type=style&index=0&id=77f8f0e9&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"77f8f0e9\",\n  null\n  \n)\n\nexport default component.exports","import './setPublicPath'\nimport mod from '~entry'\nexport default mod\nexport * from '~entry'\n"],"sourceRoot":""}
\ No newline at end of file
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Uint8Array : Array\n\nvar code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'\nfor (var i = 0, len = code.length; i < len; ++i) {\n  lookup[i] = code[i]\n  revLookup[code.charCodeAt(i)] = i\n}\n\n// Support decoding URL-safe base64 strings, as Node.js does.\n// See: https://en.wikipedia.org/wiki/Base64#URL_applications\nrevLookup['-'.charCodeAt(0)] = 62\nrevLookup['_'.charCodeAt(0)] = 63\n\nfunction getLens (b64) {\n  var len = b64.length\n\n  if (len % 4 > 0) {\n    throw new Error('Invalid string. Length must be a multiple of 4')\n  }\n\n  // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n  var validLen = b64.indexOf('=')\n  if (validLen === -1) validLen = len\n\n  var placeHoldersLen = validLen === len\n    ? 0\n    : 4 - (validLen % 4)\n\n  return [validLen, placeHoldersLen]\n}\n\n// base64 is 4/3 + up to two characters of the original data\nfunction byteLength (b64) {\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction _byteLength (b64, validLen, placeHoldersLen) {\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction toByteArray (b64) {\n  var tmp\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))\n\n  var curByte = 0\n\n  // if there are placeholders, only get up to the last complete 4 chars\n  var len = placeHoldersLen > 0\n    ? validLen - 4\n    : validLen\n\n  var i\n  for (i = 0; i < len; i += 4) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 18) |\n      (revLookup[b64.charCodeAt(i + 1)] << 12) |\n      (revLookup[b64.charCodeAt(i + 2)] << 6) |\n      revLookup[b64.charCodeAt(i + 3)]\n    arr[curByte++] = (tmp >> 16) & 0xFF\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 2) |\n      (revLookup[b64.charCodeAt(i + 1)] >> 4)\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 10) |\n      (revLookup[b64.charCodeAt(i + 1)] << 4) |\n      (revLookup[b64.charCodeAt(i + 2)] >> 2)\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  return arr\n}\n\nfunction tripletToBase64 (num) {\n  return lookup[num >> 18 & 0x3F] +\n    lookup[num >> 12 & 0x3F] +\n    lookup[num >> 6 & 0x3F] +\n    lookup[num & 0x3F]\n}\n\nfunction encodeChunk (uint8, start, end) {\n  var tmp\n  var output = []\n  for (var i = start; i < end; i += 3) {\n    tmp =\n      ((uint8[i] << 16) & 0xFF0000) +\n      ((uint8[i + 1] << 8) & 0xFF00) +\n      (uint8[i + 2] & 0xFF)\n    output.push(tripletToBase64(tmp))\n  }\n  return output.join('')\n}\n\nfunction fromByteArray (uint8) {\n  var tmp\n  var len = uint8.length\n  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes\n  var parts = []\n  var maxChunkLength = 16383 // must be multiple of 3\n\n  // go through the array every three bytes, we'll deal with trailing stuff later\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(\n      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)\n    ))\n  }\n\n  // pad the end with zeros, but make sure to not forget the extra bytes\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 2] +\n      lookup[(tmp << 4) & 0x3F] +\n      '=='\n    )\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 10] +\n      lookup[(tmp >> 4) & 0x3F] +\n      lookup[(tmp << 2) & 0x3F] +\n      '='\n    )\n  }\n\n  return parts.join('')\n}\n","import mod from \"-!../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=style&index=0&id=7bad0327&scoped=true&lang=css&\"; export default mod; export * from \"-!../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=style&index=0&id=7bad0327&scoped=true&lang=css&\"","import mod from \"-!../../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=style&index=0&id=a6774e8e&scoped=true&lang=css&\"; export default mod; export * from \"-!../../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=style&index=0&id=a6774e8e&scoped=true&lang=css&\"","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\n/*\n * Export kMaxLength after typed array support is determined.\n */\nexports.kMaxLength = kMaxLength()\n\nfunction typedArraySupport () {\n  try {\n    var arr = new Uint8Array(1)\n    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}\n    return arr.foo() === 42 && // typed array instances can be augmented\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\nfunction createBuffer (that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length')\n  }\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length)\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length)\n    }\n    that.length = length\n  }\n\n  return that\n}\n\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\nfunction Buffer (arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length)\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error(\n        'If encoding is specified then the first argument must be a string'\n      )\n    }\n    return allocUnsafe(this, arg)\n  }\n  return from(this, arg, encodingOrOffset, length)\n}\n\nBuffer.poolSize = 8192 // not used by this implementation\n\n// TODO: Legacy, not needed anymore. Remove in next major version.\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype\n  return arr\n}\n\nfunction from (that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length)\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset)\n  }\n\n  return fromObject(that, value)\n}\n\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length)\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n  if (typeof Symbol !== 'undefined' && Symbol.species &&\n      Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    })\n  }\n}\n\nfunction assertSize (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number')\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative')\n  }\n}\n\nfunction alloc (that, size, fill, encoding) {\n  assertSize(size)\n  if (size <= 0) {\n    return createBuffer(that, size)\n  }\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string'\n      ? createBuffer(that, size).fill(fill, encoding)\n      : createBuffer(that, size).fill(fill)\n  }\n  return createBuffer(that, size)\n}\n\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding)\n}\n\nfunction allocUnsafe (that, size) {\n  assertSize(size)\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size)\n}\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size)\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8'\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding')\n  }\n\n  var length = byteLength(string, encoding) | 0\n  that = createBuffer(that, length)\n\n  var actual = that.write(string, encoding)\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual)\n  }\n\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0\n  that = createBuffer(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array, byteOffset, length) {\n  array.byteLength // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds')\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds')\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array)\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset)\n  } else {\n    array = new Uint8Array(array, byteOffset, length)\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array)\n  }\n  return that\n}\n\nfunction fromObject (that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0\n    that = createBuffer(that, len)\n\n    if (that.length === 0) {\n      return that\n    }\n\n    obj.copy(that, 0, 0, len)\n    return that\n  }\n\n  if (obj) {\n    if ((typeof ArrayBuffer !== 'undefined' &&\n        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0)\n      }\n      return fromArrayLike(that, obj)\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data)\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (length) {\n  if (+length != length) { // eslint-disable-line eqeqeq\n    length = 0\n  }\n  return Buffer.alloc(+length)\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i]\n      y = b[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers')\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length)\n  var pos = 0\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i]\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers')\n    }\n    buf.copy(buffer, pos)\n    pos += buf.length\n  }\n  return buffer\n}\n\nfunction byteLength (string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length\n  }\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&\n      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength\n  }\n  if (typeof string !== 'string') {\n    string = '' + string\n  }\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n  if (start === undefined || start < 0) {\n    start = 0\n  }\n  // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n  if (start > this.length) {\n    return ''\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length\n  }\n\n  if (end <= 0) {\n    return ''\n  }\n\n  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n  end >>>= 0\n  start >>>= 0\n\n  if (end <= start) {\n    return ''\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\n// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\nBuffer.prototype._isBuffer = true\n\nfunction swap (b, n, m) {\n  var i = b[n]\n  b[n] = b[m]\n  b[m] = i\n}\n\nBuffer.prototype.swap16 = function swap16 () {\n  var len = this.length\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits')\n  }\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1)\n  }\n  return this\n}\n\nBuffer.prototype.swap32 = function swap32 () {\n  var len = this.length\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits')\n  }\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3)\n    swap(this, i + 1, i + 2)\n  }\n  return this\n}\n\nBuffer.prototype.swap64 = function swap64 () {\n  var len = this.length\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits')\n  }\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7)\n    swap(this, i + 1, i + 6)\n    swap(this, i + 2, i + 5)\n    swap(this, i + 3, i + 4)\n  }\n  return this\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer')\n  }\n\n  if (start === undefined) {\n    start = 0\n  }\n  if (end === undefined) {\n    end = target ? target.length : 0\n  }\n  if (thisStart === undefined) {\n    thisStart = 0\n  }\n  if (thisEnd === undefined) {\n    thisEnd = this.length\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index')\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0\n  }\n  if (thisStart >= thisEnd) {\n    return -1\n  }\n  if (start >= end) {\n    return 1\n  }\n\n  start >>>= 0\n  end >>>= 0\n  thisStart >>>= 0\n  thisEnd >>>= 0\n\n  if (this === target) return 0\n\n  var x = thisEnd - thisStart\n  var y = end - start\n  var len = Math.min(x, y)\n\n  var thisCopy = this.slice(thisStart, thisEnd)\n  var targetCopy = target.slice(start, end)\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i]\n      y = targetCopy[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\n// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\nfunction bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1\n\n  // Normalize byteOffset\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset\n    byteOffset = 0\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000\n  }\n  byteOffset = +byteOffset  // Coerce to Number.\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : (buffer.length - 1)\n  }\n\n  // Normalize byteOffset: negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1\n    else byteOffset = buffer.length - 1\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0\n    else return -1\n  }\n\n  // Normalize val\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding)\n  }\n\n  // Finally, search either indexOf (if dir is true) or lastIndexOf\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1\n    }\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)\n  } else if (typeof val === 'number') {\n    val = val & 0xFF // Search for a byte value [0-255]\n    if (Buffer.TYPED_ARRAY_SUPPORT &&\n        typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)\n      }\n    }\n    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\nfunction arrayIndexOf (arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1\n  var arrLength = arr.length\n  var valLength = val.length\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase()\n    if (encoding === 'ucs2' || encoding === 'ucs-2' ||\n        encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1\n      }\n      indexSize = 2\n      arrLength /= 2\n      valLength /= 2\n      byteOffset /= 2\n    }\n  }\n\n  function read (buf, i) {\n    if (indexSize === 1) {\n      return buf[i]\n    } else {\n      return buf.readUInt16BE(i * indexSize)\n    }\n  }\n\n  var i\n  if (dir) {\n    var foundIndex = -1\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex\n        foundIndex = -1\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false\n          break\n        }\n      }\n      if (found) return i\n    }\n  }\n\n  return -1\n}\n\nBuffer.prototype.includes = function includes (val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)\n}\n\nBuffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) return i\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction latin1Write (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    throw new Error(\n      'Buffer.write(string, encoding, offset[, length]) is no longer supported'\n    )\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction latin1Slice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end)\n    newBuf.__proto__ = Buffer.prototype\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n  if (offset < 0) throw new RangeError('Index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    Uint8Array.prototype.set.call(\n      target,\n      this.subarray(start, start + len),\n      targetStart\n    )\n  }\n\n  return len\n}\n\n// Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\nBuffer.prototype.fill = function fill (val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start\n      start = 0\n      end = this.length\n    } else if (typeof end === 'string') {\n      encoding = end\n      end = this.length\n    }\n    if (val.length === 1) {\n      var code = val.charCodeAt(0)\n      if (code < 256) {\n        val = code\n      }\n    }\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string')\n    }\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding)\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255\n  }\n\n  // Invalid ranges are not set to a default, so can range check early.\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index')\n  }\n\n  if (end <= start) {\n    return this\n  }\n\n  start = start >>> 0\n  end = end === undefined ? this.length : end >>> 0\n\n  if (!val) val = 0\n\n  var i\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val)\n      ? val\n      : utf8ToBytes(new Buffer(val, encoding).toString())\n    var len = bytes.length\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; ++i) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n\nfunction isnan (val) {\n  return val !== val // eslint-disable-line no-self-compare\n}\n","import mod from \"-!../../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=style&index=0&id=a326889c&scoped=true&lang=css&\"; export default mod; export * from \"-!../../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=style&index=0&id=a326889c&scoped=true&lang=css&\"","var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};\n","/**\r\n * Date:2020/11/9\r\n * Desc:\r\n */\r\n/**\r\n * Date:2020/11/2\r\n * Desc: ptz cmd 封装\r\n * cmd[0] //首字节以05H开头\r\n * cmd[1] //组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码\r\n *        //  校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16\r\n * cmd[2] //地址的低8位？？？什么地址，地址范围000h ~ FFFh(0~4095),其中000h为广播地址\r\n * cmd[3] //指令码\r\n * cmd[4] //数据1,水平控制速度、聚焦速度\r\n * cmd[5] //数据2，垂直控制速度、光圈速度\r\n * cmd[6] // 高4位为数据3=变倍控制速度，低4位为地址高4位\r\n */\r\n\r\nconst PTZ_TYPE = {\r\n    stop: 'stop',\r\n    right: 'right',\r\n    left: 'left',\r\n    up: 'up',\r\n    down: 'down',\r\n    leftUp: 'leftUp',\r\n    leftDown: 'leftDown',\r\n    rightUp: 'rightUp',\r\n    rightDown: 'rightDown',\r\n    zoomFar: 'zoomFar',\r\n    zoomNear: 'zoomNear',\r\n    apertureFar: 'apertureFar',\r\n    apertureNear: 'apertureNear',\r\n    focusFar: 'focusFar',\r\n    focusNear: 'focusNear',\r\n    setPos: 'setPos',\r\n    calPos: 'calPos',\r\n    delPos: 'delPos'\r\n};\r\n\r\nconst PTZ_CMD_TYPE = {\r\n    stop: 0x00,\r\n\r\n    right: 0x01,\r\n    left: 0x02,\r\n    up: 0x08,\r\n    down: 0x04,\r\n\r\n    leftUp: 0x0A,\r\n    leftDown: 0x06,\r\n    rightUp: 0x09,\r\n    rightDown: 0x05,\r\n\r\n    zoomFar: 0x10, // 镜头 放大\r\n    zoomNear: 0x20,  // 镜头 缩小\r\n\r\n    apertureFar: 0x48, // 光圈 缩小\r\n    apertureNear: 0x44, // 光圈 放大\r\n\r\n    focusFar: 0x42, // 聚焦 近\r\n    focusNear: 0x41, // 聚焦 远\r\n\r\n    setPos: 0x81,\r\n    calPos: 0x82,\r\n    delPos: 0x83\r\n};\r\n\r\nconst SPEED_ARRAY = [0x19, 0x32, 0x4b, 0x64, 0x7d, 0x96, 0xAF, 0xC8, 0xE1, 0xFA];\r\nconst POSITION_ARRAY = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10];\r\n\r\n// 获取 direction 方向型\r\n/**\r\n *\r\n * @param options\r\n *        type:\r\n *        speed:default 5\r\n *        index:\r\n * @returns {string}\r\n */\r\nfunction getPTZCmd(options) {\r\n    const {type, speed, index} = options;\r\n    const ptzSpeed = getPTZSpeed(speed);\r\n    let indexValue3, indexValue4, indexValue5, indexValue6;\r\n    indexValue3 = PTZ_CMD_TYPE[type];\r\n    switch (type) {\r\n        case PTZ_TYPE.up:\r\n        case PTZ_TYPE.down:\r\n        case PTZ_TYPE.apertureFar:\r\n        case PTZ_TYPE.apertureNear:\r\n            indexValue5 = ptzSpeed;\r\n            break;\r\n        case PTZ_TYPE.right:\r\n        case PTZ_TYPE.left:\r\n        case PTZ_TYPE.focusFar:\r\n        case PTZ_TYPE.focusNear:\r\n            indexValue4 = ptzSpeed;\r\n            break;\r\n        case PTZ_TYPE.leftUp:\r\n        case PTZ_TYPE.leftDown:\r\n        case PTZ_TYPE.rightUp:\r\n        case PTZ_TYPE.rightDown:\r\n            indexValue4 = ptzSpeed;\r\n            indexValue5 = ptzSpeed;\r\n            break;\r\n        case PTZ_TYPE.zoomFar:\r\n        case PTZ_TYPE.zoomNear:\r\n            indexValue6 = 0x10;\r\n            break;\r\n        case PTZ_TYPE.calPos:\r\n        case PTZ_TYPE.delPos:\r\n        case PTZ_TYPE.setPos:\r\n            indexValue5 = getPTZPositionIndex(index);\r\n            break;\r\n        default:\r\n            break;\r\n    }\r\n    return ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6);\r\n}\r\n\r\nfunction getPTZSpeed(speed) {\r\n    speed = speed || 5;\r\n    const speedIndex = speed - 1;\r\n    const ptzSpeed = SPEED_ARRAY[speedIndex] || SPEED_ARRAY[4];\r\n    return ptzSpeed;\r\n}\r\n\r\nfunction getPTZPositionIndex(index) {\r\n    return POSITION_ARRAY[index - 1];\r\n}\r\n\r\nfunction ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6) {\r\n    //\r\n    let cmd = Buffer.alloc(8);\r\n    // 首字节以05H开头\r\n    cmd[0] = 0xA5;\r\n    // 组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码\r\n    cmd[1] = 0x0F;\r\n    // 校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16\r\n    cmd[2] = 0x01;\r\n    //\r\n    if (indexValue3) {\r\n        cmd[3] = indexValue3;\r\n    }\r\n    if (indexValue4) {\r\n        cmd[4] = indexValue4;\r\n    }\r\n    if (indexValue5) {\r\n        cmd[5] = indexValue5;\r\n    }\r\n    if (indexValue6) {\r\n        cmd[6] = indexValue6;\r\n    }\r\n\r\n    cmd[7] = (cmd[0] + cmd[1] + cmd[2] + cmd[3] + cmd[4] + cmd[5] + cmd[6]) % 256;\r\n\r\n    return bytes2HexString(cmd);\r\n}\r\n\r\nfunction bytes2HexString(byte) {\r\n    let hexs = \"\";\r\n    for (let i = 0; i < byte.length; i++) {\r\n        let hex = (byte[i]).toString(16);\r\n        if (hex.length === 1) {\r\n            hex = '0' + hex;\r\n        }\r\n        hexs += hex.toUpperCase();\r\n    }\r\n    return hexs;\r\n}\r\n\r\nexport {\r\n    getPTZCmd,\r\n    PTZ_TYPE\r\n}\r\n","// extracted by mini-css-extract-plugin","exports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = ((value * c) - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n","// extracted by mini-css-extract-plugin","var g;\n\n// This works in non-strict mode\ng = (function() {\n\treturn this;\n})();\n\ntry {\n\t// This works if eval is allowed (see CSP)\n\tg = g || new Function(\"return this\")();\n} catch (e) {\n\t// This works if the window reference is available\n\tif (typeof window === \"object\") g = window;\n}\n\n// g can still be undefined, but nothing to do about it...\n// We return undefined, instead of nothing here, so it's\n// easier to handle this case. if(!global) { ...}\n\nmodule.exports = g;\n","// This file is imported into lib/wc client bundles.\n\nif (typeof window !== 'undefined') {\n  var currentScript = window.document.currentScript\n  if (process.env.NEED_CURRENTSCRIPT_POLYFILL) {\n    var getCurrentScript = require('@soda/get-current-script')\n    currentScript = getCurrentScript()\n\n    // for backward compatibility, because previously we directly included the polyfill\n    if (!('currentScript' in document)) {\n      Object.defineProperty(document, 'currentScript', { get: getCurrentScript })\n    }\n  }\n\n  var src = currentScript && currentScript.src.match(/(.+\\/)[^/]+\\.js(\\?.*)?$/)\n  if (src) {\n    __webpack_public_path__ = src[1] // eslint-disable-line\n  }\n}\n\n// Indicate to webpack that this file can be concatenated\nexport default null\n","var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',[(_vm.$parent.titleTabActive === 0)?_c('div',{staticClass:\"tabpanel\"},[_c('mu-data-table',{attrs:{\"data\":_vm.Devices,\"columns\":_vm.columns},scopedSlots:_vm._u([{key:\"expand\",fn:function(prop){return [_c('mu-data-table',{attrs:{\"data\":prop.row.Channels,\"columns\":_vm.columns2},scopedSlots:_vm._u([{key:\"default\",fn:function(ref){\nvar item = ref.row;\nvar $index = ref.$index;\nreturn [_c('td',[_vm._v(_vm._s(item.DeviceID))]),_c('td',[_vm._v(_vm._s(item.Name))]),_c('td',[_vm._v(_vm._s(item.Manufacturer))]),_c('td',[_vm._v(_vm._s(item.Address))]),_c('td',[_vm._v(_vm._s(item.Status))]),_c('td',[(item.Connected)?_c('mu-button',{attrs:{\"flat\":\"\"},on:{\"click\":function($event){return _vm.ptz(prop.row.ID, $index, item)}}},[_vm._v(\"云台 \")]):_vm._e(),(item.Connected)?_c('mu-button',{attrs:{\"flat\":\"\"},on:{\"click\":function($event){return _vm.bye(prop.row.ID, $index)}}},[_vm._v(\"断开\")]):_c('mu-button',{attrs:{\"flat\":\"\"},on:{\"click\":function($event){return _vm.invite(prop.row.ID, $index, item)}}},[_vm._v(\"连接 \")])],1)]}}],null,true)})]}},{key:\"default\",fn:function(ref){\nvar item = ref.row;\nreturn [_c('td',[_vm._v(_vm._s(item.ID))]),_c('td',[_vm._v(_vm._s(item.Addr))]),_c('td',[_vm._v(_vm._s(item.Channels ? item.Channels.length : 0))]),_c('td',[_c('StartTime',{attrs:{\"value\":item.RegisterTime}})],1),_c('td',[_c('StartTime',{attrs:{\"value\":item.UpdateTime}})],1),_c('td',[_vm._v(_vm._s(item.Status))])]}}],null,false,2809573184)})],1):_vm._e(),(_vm.$parent.titleTabActive === 1)?_c('div',{staticClass:\"tabpanel\"},[_c('div',{staticClass:\"search\"},[_c('i-select',{attrs:{\"multiple\":\"\"},model:{value:(_vm.channelSelectedList),callback:function ($$v) {_vm.channelSelectedList=$$v},expression:\"channelSelectedList\"}},_vm._l((_vm.channelList),function(channel,index){return _c('Option',{key:index,attrs:{\"value\":channel,\"label\":channel.DeviceID + '(' + channel.Name + ')'}})}),1)],1),_c('div',{staticClass:\"flex-box\"},[_vm._l((_vm.channelSelectedList),function(channel,index){return [(channel.ID)?_c('div',{key:index,staticClass:\"flex-item\"},[_c('webrtc-player2',{attrs:{\"stream-path\":'gb28181/' + channel.ID}})],1):_vm._e()]})],2)]):_vm._e(),_c('webrtc-player',{ref:\"player\",attrs:{\"PublicIP\":_vm.PublicIP},on:{\"ptz\":_vm.sendPtz},model:{value:(_vm.previewStreamPath),callback:function ($$v) {_vm.previewStreamPath=$$v},expression:\"previewStreamPath\"}})],1)}\nvar staticRenderFns = []\n\nexport { render, staticRenderFns }","var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('Modal',_vm._g(_vm._b({attrs:{\"draggable\":\"\",\"width\":\"750\",\"title\":_vm.streamPath},on:{\"on-ok\":_vm.onClosePreview,\"on-cancel\":_vm.onClosePreview}},'Modal',_vm.$attrs,false),_vm.$listeners),[_c('div',{staticClass:\"container\"},[_c('video',{ref:\"webrtc\",attrs:{\"width\":\"488\",\"height\":\"275\",\"autoplay\":\"\",\"muted\":\"\",\"controls\":\"\"},domProps:{\"srcObject\":_vm.stream,\"muted\":true}}),_c('div',{staticClass:\"control\"},[_vm._l((8),function(n){return _c('svg',{class:'arrow'+n,attrs:{\"viewBox\":\"0 0 1024 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874.666667a21.333333 21.333333 0 0 1-21.333333-21.333334v-128a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333334z\"  /></svg>\r\n      </div>\r\n      <div class=\"control5\">\r\n        <i-select v-model=\"ptzPositionIndex\" style=\"width: 100px\">\r\n          <Option v-for=\"n in 10\" :value=\"n\" :key=\"n\">预置点{{n}}</Option>\r\n        </i-select>\r\n        <i-button type=\"primary\" @click=\"ptzCmd(ptzType.setPos)\">设置</i-button>\r\n        <i-button type=\"success\" @click=\"ptzCmd(ptzType.calPos)\">调用</i-button>\r\n        <i-button type=\"error\" @click=\"ptzCmd(ptzType.delPos)\">删除</i-button>\r\n        速度：\r\n        <InputNumber :max=\"10\" :min=\"1\" v-model=\"ptzSpeed\"></InputNumber>\r\n      </div>\r\n    </div>\r\n    <div slot=\"footer\">\r\n      <mu-badge v-if=\"remoteSDP\">\r\n        <a slot=\"content\" :href=\"remoteSDPURL\" download=\"remoteSDP.txt\">remoteSDP</a>\r\n      </mu-badge>\r\n      <mu-badge v-if=\"localSDP\">\r\n        <a slot=\"content\" :href=\"localSDPURL\" download=\"localSDP.txt\">localSDP</a>\r\n      </mu-badge>\r\n    </div>\r\n  </Modal>\r\n</template>\r\n<script>\r\n  import {PTZ_TYPE} from \"../utils/ptz-cmd\";\r\n  const PTZ_DIRECTION_ARRAY = [PTZ_TYPE.up,PTZ_TYPE.right,PTZ_TYPE.down,PTZ_TYPE.left,PTZ_TYPE.leftUp,PTZ_TYPE.rightUp,PTZ_TYPE.leftDown,PTZ_TYPE.rightDown];\r\n  let pc = null;\r\nexport default {\r\n  data() {\r\n    return {\r\n      iceConnectionState: pc && pc.iceConnectionState,\r\n      stream: null,\r\n      localSDP: \"\",\r\n      remoteSDP: \"\",\r\n      remoteSDPURL: \"\",\r\n      localSDPURL: \"\",\r\n      streamPath: \"\",\r\n      ptzSpeed:5,\r\n      ptzPositionIndex:1,\r\n      ptzType:PTZ_TYPE,\r\n    };\r\n  },\r\n  props:{\r\n    PublicIP:String\r\n  },\r\n    methods: {\r\n        async play(streamPath) {\r\n            pc = new RTCPeerConnection();\r\n            pc.addTransceiver('video',{\r\n              direction:'recvonly'\r\n            })\r\n            this.streamPath = streamPath;\r\n            pc.onsignalingstatechange = e => {\r\n                //console.log(e);\r\n            };\r\n            pc.oniceconnectionstatechange = e => {\r\n                this.$toast.info(pc.iceConnectionState);\r\n                this.iceConnectionState = pc.iceConnectionState;\r\n            };\r\n            pc.onicecandidate = event => {\r\n                console.log(event)\r\n            };\r\n            pc.ontrack = event => {\r\n               // console.log(event);\r\n                if (event.track.kind == \"video\")\r\n                    this.stream = event.streams[0];\r\n            };\r\n            await pc.setLocalDescription(await pc.createOffer());\r\n            this.localSDP = pc.localDescription.sdp;\r\n            this.localSDPURL = URL.createObjectURL(\r\n                new Blob([this.localSDP], { type: \"text/plain\" })\r\n            );\r\n            const result = await this.ajax({\r\n                type: \"POST\",\r\n                processData: false,\r\n                data: JSON.stringify(pc.localDescription.toJSON()),\r\n                url: \"/webrtc/play?streamPath=\" + this.streamPath,\r\n                dataType: \"json\"\r\n            });\r\n            if (result.errmsg) {\r\n                this.$toast.error(result.errmsg);\r\n                return;\r\n            } else {\r\n                this.remoteSDP = result.sdp;\r\n                this.remoteSDPURL = URL.createObjectURL(new Blob([this.remoteSDP], { type: \"text/plain\" }));\r\n            }\r\n            await pc.setRemoteDescription(new RTCSessionDescription(result));\r\n        },\r\n        ptzCmdDirection(direction){\r\n          const type = PTZ_DIRECTION_ARRAY[direction-1];\r\n          this.ptzCmd(type);\r\n        },\r\n        startPtzCmdCycle(){\r\n          this.ptzCmd(PTZ_TYPE.right,true);\r\n        },\r\n        stopPtzCmdCycle(){\r\n          this.ptzCmd(PTZ_TYPE.stop);\r\n        },\r\n        ptzCmd(type,isCycling){\r\n          this.$emit('ptz',{type:type,speed:this.ptzSpeed,index:this.ptzPositionIndex,cycle:isCycling})\r\n        },\r\n        onClosePreview() {\r\n            pc.close();\r\n        }\r\n    }\r\n};\r\n</script>\r\n<style scoped>\r\n  .arrow1{\r\n    grid-column: 2;\r\n    grid-row: 1;\r\n  }\r\n  .arrow2{\r\n    transform: rotate(90deg);\r\n    grid-column: 3;\r\n    grid-row: 2;\r\n  }\r\n  .arrow3{\r\n    transform: rotate(180deg);\r\n    grid-column: 2;\r\n    grid-row: 3;\r\n  }\r\n  .arrow4{\r\n    transform: rotate(270deg);\r\n    grid-column: 1;\r\n    grid-row: 2;\r\n  }\r\n\r\n  .arrow5{\r\n    transform: rotate(-45deg);\r\n    grid-column: 1;\r\n    grid-row: 1;\r\n  }\r\n\r\n  .arrow6{\r\n    transform: rotate(45deg);\r\n    grid-column: 3;\r\n    grid-row: 1;\r\n  }\r\n\r\n  .arrow7{\r\n    transform: rotate(-135deg);\r\n    grid-column: 1;\r\n    grid-row: 3;\r\n  }\r\n\r\n  .arrow8{\r\n    transform: rotate(135deg);\r\n    grid-column: 3;\r\n    grid-row: 3;\r\n  }\r\n\r\n  .arrow9{\r\n    grid-column: 2;\r\n    grid-row: 2;\r\n  }\r\n\r\n.container {\r\n  position: relative;\r\n  height: 350px;\r\n}\r\n.control {\r\n  position: absolute;\r\n  top: 20px;\r\n  right: 0;\r\n  display: grid;\r\n  grid-template-columns: repeat(3, 33.33%);\r\n  grid-template-rows: repeat(3, 33.33%);\r\n  width: 192px;\r\n  height: 192px;\r\n}\r\n\r\n.control2{\r\n  top: 210px;\r\n}\r\n\r\n.control3{\r\n  top: 260px;\r\n}\r\n\r\n.control4{\r\n  top: 310px;\r\n}\r\n\r\n.control5{\r\n  top: 360px;\r\n}\r\n\r\n.control >* {\r\n  cursor: pointer;\r\n  fill: gray;\r\n  width: 50px;\r\n  height: 50px;\r\n}\r\n\r\n.control5 >*{\r\n  margin-right: 10px;\r\n}\r\n\r\n.control2 >*,.control3 >*,.control4 >*{\r\n  width: 40px;\r\n  height: 40px;\r\n}\r\n\r\n.control >*:hover,.cycling{\r\n  fill: cyan\r\n}\r\n\r\n\r\n\r\n</style>\r\n","import mod from \"-!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=script&lang=js&\"","/* globals __VUE_SSR_CONTEXT__ */\n\n// IMPORTANT: Do NOT use ES2015 features in this file (except for modules).\n// This module is a runtime utility for cleaner component module output and will\n// be included in the final webpack user bundle.\n\nexport default function normalizeComponent (\n  scriptExports,\n  render,\n  staticRenderFns,\n  functionalTemplate,\n  injectStyles,\n  scopeId,\n  moduleIdentifier, /* server only */\n  shadowMode /* vue-cli only */\n) {\n  // Vue.extend constructor export interop\n  var options = typeof scriptExports === 'function'\n    ? scriptExports.options\n    : scriptExports\n\n  // render functions\n  if (render) {\n    options.render = render\n    options.staticRenderFns = staticRenderFns\n    options._compiled = true\n  }\n\n  // functional template\n  if (functionalTemplate) {\n    options.functional = true\n  }\n\n  // scopedId\n  if (scopeId) {\n    options._scopeId = 'data-v-' + scopeId\n  }\n\n  var hook\n  if (moduleIdentifier) { // server build\n    hook = function (context) {\n      // 2.3 injection\n      context =\n        context || // cached call\n        (this.$vnode && this.$vnode.ssrContext) || // stateful\n        (this.parent && this.parent.$vnode && this.parent.$vnode.ssrContext) // functional\n      // 2.2 with runInNewContext: true\n      if (!context && typeof __VUE_SSR_CONTEXT__ !== 'undefined') {\n        context = __VUE_SSR_CONTEXT__\n      }\n      // inject component styles\n      if (injectStyles) {\n        injectStyles.call(this, context)\n      }\n      // register component module identifier for async chunk inferrence\n      if (context && context._registeredComponents) {\n        context._registeredComponents.add(moduleIdentifier)\n      }\n    }\n    // used by ssr in case component is cached and beforeCreate\n    // never gets called\n    options._ssrRegister = hook\n  } else if (injectStyles) {\n    hook = shadowMode\n      ? function () {\n        injectStyles.call(\n          this,\n          (options.functional ? this.parent : this).$root.$options.shadowRoot\n        )\n      }\n      : injectStyles\n  }\n\n  if (hook) {\n    if (options.functional) {\n      // for template-only hot-reload because in that case the render fn doesn't\n      // go through the normalizer\n      options._injectStyles = hook\n      // register for functional component in vue file\n      var originalRender = options.render\n      options.render = function renderWithStyleInjection (h, context) {\n        hook.call(context)\n        return originalRender(h, context)\n      }\n    } else {\n      // inject component registration as beforeCreate hook\n      var existing = options.beforeCreate\n      options.beforeCreate = existing\n        ? [].concat(existing, hook)\n        : [hook]\n    }\n  }\n\n  return {\n    exports: scriptExports,\n    options: options\n  }\n}\n","import { render, staticRenderFns } from \"./Player.vue?vue&type=template&id=a6774e8e&scoped=true&\"\nimport script from \"./Player.vue?vue&type=script&lang=js&\"\nexport * from \"./Player.vue?vue&type=script&lang=js&\"\nimport style0 from \"./Player.vue?vue&type=style&index=0&id=a6774e8e&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"a6774e8e\",\n  null\n  \n)\n\nexport default component.exports","var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',{staticClass:\"player-wrap\"},[(_vm.rtcStream)?[_c('video',{attrs:{\"autoplay\":\"\",\"muted\":\"\",\"controls\":\"\"},domProps:{\"srcObject\":_vm.rtcStream,\"muted\":true}})]:_vm._e()],2)}\nvar staticRenderFns = []\n\nexport { render, staticRenderFns }","<template>\r\n    <div class=\"player-wrap\">\r\n        <template v-if=\"rtcStream\">\r\n            <video :srcObject.prop=\"rtcStream\" autoplay muted controls></video>\r\n        </template>\r\n    </div>\r\n</template>\r\n\r\n<script>\r\n    export default {\r\n        name: \"WebrtcPlayer\",\r\n        rtcPeerConnection: null,\r\n        data() {\r\n            return {\r\n                iceConnectionState: '',\r\n                rtcPeerConnectionInit: false,\r\n                rtcStream: null\r\n            }\r\n        },\r\n        props: {\r\n            streamPath: {\r\n                type: String,\r\n                default: ''\r\n            }\r\n        },\r\n        async created() {\r\n            await this.initRtcPeerConnection();\r\n            console.log('initRtcPeerConnectioned');\r\n            if (this.streamPath) {\r\n                await this.play(this.streamPath);\r\n                console.log('played');\r\n            }\r\n        },\r\n        methods: {\r\n            async initRtcPeerConnection() {\r\n                const rtcPeerConnection = new RTCPeerConnection();\r\n\r\n                rtcPeerConnection.addTransceiver('video', {\r\n                    direction: \"recvonly\"\r\n                });\r\n\r\n                rtcPeerConnection.onsignalingstatechange = e => {\r\n                    console.log('onsignalingstatechange', e);\r\n                };\r\n\r\n                rtcPeerConnection.oniceconnectionstatechange = e => {\r\n                    console.log('oniceconnectionstatechange', rtcPeerConnection.iceConnectionState);\r\n                };\r\n\r\n                rtcPeerConnection.onicecandidate = event => {\r\n                    console.log('onicecandidate', event);\r\n                };\r\n\r\n                rtcPeerConnection.ontrack = event => {\r\n                    console.log('ontrack', event);\r\n                    if (event.track.kind === \"video\") {\r\n                        this.rtcStream = event.streams[0];\r\n                    }\r\n                };\r\n\r\n                const rtcSessionDescriptionInit = await rtcPeerConnection.createOffer();\r\n                await rtcPeerConnection.setLocalDescription(rtcSessionDescriptionInit);\r\n                this.rtcPeerConnectionInit = true;\r\n                this.$options.rtcPeerConnection = rtcPeerConnection;\r\n            },\r\n\r\n            //\r\n            async play(streamPath) {\r\n                const rtcPeerConnection = this.$options.rtcPeerConnection;\r\n                const localDescriptionData = rtcPeerConnection.localDescription.toJSON();\r\n                const result = await this.ajax({\r\n                    type: \"POST\",\r\n                    processData: false,\r\n                    data: localDescriptionData,\r\n                    url: \"/webrtc/play?streamPath=\" + streamPath,\r\n                    dataType: \"json\"\r\n                });\r\n                if (result.error) {\r\n                    return;\r\n                }\r\n                //\r\n                rtcPeerConnection.setRemoteDescription(new RTCSessionDescription({\r\n                    type: result.type,\r\n                    sdp: result.sdp\r\n                }));\r\n            },\r\n            close() {\r\n                const rtcPeerConnection = this.$options.rtcPeerConnection;\r\n                rtcPeerConnection && rtcPeerConnection.close();\r\n            }\r\n        },\r\n        destroyed() {\r\n            this.close();\r\n        }\r\n    }\r\n</script>\r\n\r\n<style scoped>\r\n    .player-wrap {\r\n        width: 100%;\r\n        height: 100%;\r\n    }\r\n\r\n    .player-wrap video {\r\n        width: 100%;\r\n        height: 100%;\r\n    }\r\n</style>\r\n","import mod from \"-!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=script&lang=js&\"","import { render, staticRenderFns } from \"./Player2.vue?vue&type=template&id=a326889c&scoped=true&\"\nimport script from \"./Player2.vue?vue&type=script&lang=js&\"\nexport * from \"./Player2.vue?vue&type=script&lang=js&\"\nimport style0 from \"./Player2.vue?vue&type=style&index=0&id=a326889c&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"a326889c\",\n  null\n  \n)\n\nexport default component.exports","<template>\r\n    <div>\r\n        <div class=\"tabpanel\" v-if=\"$parent.titleTabActive === 0\">\r\n            <mu-data-table :data=\"Devices\" :columns=\"columns\">\r\n                <template #expand=\"prop\">\r\n                    <mu-data-table\r\n                        :data=\"prop.row.Channels\"\r\n                        :columns=\"columns2\"\r\n                    >\r\n                        <template #default=\"{ row: item, $index }\">\r\n                            <td>{{ item.DeviceID }}</td>\r\n                            <td>{{ item.Name }}</td>\r\n                            <td>{{ item.Manufacturer }}</td>\r\n                            <td>{{ item.Address }}</td>\r\n                            <td>{{ item.Status }}</td>\r\n                            <td>\r\n                                <mu-button\r\n                                    flat\r\n                                    v-if=\"item.Connected\"\r\n                                    @click=\"ptz(prop.row.ID, $index, item)\"\r\n                                    >云台\r\n                                </mu-button>\r\n                                <mu-button\r\n                                    flat\r\n                                    v-if=\"item.Connected\"\r\n                                    @click=\"bye(prop.row.ID, $index)\"\r\n                                    >断开</mu-button\r\n                                >\r\n                                <mu-button\r\n                                    v-else\r\n                                    flat\r\n                                    @click=\"invite(prop.row.ID, $index, item)\"\r\n                                    >连接\r\n                                </mu-button>\r\n                            </td>\r\n                        </template>\r\n                    </mu-data-table>\r\n                </template>\r\n                <template #default=\"{ row: item }\">\r\n                    <td>{{ item.ID }}</td>\r\n                    <td>{{ item.Addr }}</td>\r\n                    <td>{{ item.Channels ? item.Channels.length : 0 }}</td>\r\n                    <td>\r\n                        <StartTime :value=\"item.RegisterTime\"></StartTime>\r\n                    </td>\r\n                    <td>\r\n                        <StartTime :value=\"item.UpdateTime\"></StartTime>\r\n                    </td>\r\n                    <td>{{ item.Status }}</td>\r\n                </template>\r\n            </mu-data-table>\r\n        </div>\r\n        <div class=\"tabpanel\" v-if=\"$parent.titleTabActive === 1\">\r\n            <div class=\"search\">\r\n                <i-select v-model=\"channelSelectedList\" multiple>\r\n                    <Option\r\n                        v-for=\"(channel, index) in channelList\"\r\n                        :value=\"channel\"\r\n                        :label=\"channel.DeviceID + '(' + channel.Name + ')'\"\r\n                        :key=\"index\"\r\n                    >\r\n                    </Option>\r\n                </i-select>\r\n            </div>\r\n            <div class=\"flex-box\">\r\n                <template v-for=\"(channel, index) in channelSelectedList\">\r\n                    <div class=\"flex-item\" :key=\"index\" v-if=\"channel.ID\">\r\n                        <webrtc-player2\r\n                            :stream-path=\"'gb28181/' + channel.ID\"\r\n                        ></webrtc-player2>\r\n                    </div>\r\n                </template>\r\n            </div>\r\n        </div>\r\n        <webrtc-player\r\n            ref=\"player\"\r\n            @ptz=\"sendPtz\"\r\n            v-model=\"previewStreamPath\"\r\n            :PublicIP=\"PublicIP\"\r\n        ></webrtc-player>\r\n    </div>\r\n</template>\r\n<script>\r\nimport WebrtcPlayer from \"./components/Player\";\r\nimport WebrtcPlayer2 from \"./components/Player2\";\r\nimport { getPTZCmd, PTZ_TYPE } from \"./utils/ptz-cmd\";\r\n\r\nexport default {\r\n    components: {\r\n        WebrtcPlayer,\r\n        WebrtcPlayer2,\r\n    },\r\n    props: {\r\n        ListenAddr: String,\r\n    },\r\n    computed: {\r\n        PublicIP() {\r\n            return this.ListenAddr.split(\":\")[0];\r\n        },\r\n    },\r\n    data() {\r\n        return {\r\n            Devices: [],\r\n            previewStreamPath: false,\r\n            channelList: [],\r\n            channelSelectedList: [],\r\n            context: {\r\n                id: null,\r\n                channel: 0,\r\n                item: null,\r\n            },\r\n            columns: Object.freeze(\r\n                [\r\n                    \"设备号\",\r\n                    \"地址\",\r\n                    \"通道数\",\r\n                    \"注册时间\",\r\n                    \"更新时间\",\r\n                    \"状态\",\r\n                ].map((title) => ({\r\n                    title,\r\n                }))\r\n            ),\r\n            columns2: Object.freeze([\r\n                \"通道编号\",\r\n                \"名称\",\r\n                \"厂商\",\r\n                \"地址\",\r\n                \"状态\",\r\n                \"操作\",\r\n            ]).map((title) => ({ title })),\r\n        };\r\n    },\r\n    created() {\r\n        this.fetchlist();\r\n    },\r\n    mounted() {\r\n        this.$parent.titleTabs = [\"列表\", \"N路播放\"];\r\n    },\r\n    methods: {\r\n        fetchlist() {\r\n            const listES = new EventSource(this.apiHost + \"/gb28181/list\");\r\n            listES.onmessage = (evt) => {\r\n                if (!evt.data) return;\r\n                this.Devices = JSON.parse(evt.data) || [];\r\n                this.Devices.sort((a, b) => (a.ID > b.ID ? 1 : -1));\r\n                let channelList = [];\r\n                this.Devices.forEach((device) => {\r\n                    const channels = device.Channels || [];\r\n                    if (channels.length > 0) {\r\n                        channelList = channelList.concat(channels);\r\n                    }\r\n                });\r\n                if (channelList.length > 0) {\r\n                    this.channelList = channelList;\r\n                }\r\n            };\r\n            this.$once(\"hook:destroyed\", () => listES.close());\r\n        },\r\n        ptz(id, channel, item) {\r\n            this.context = {\r\n                id,\r\n                channel,\r\n                item,\r\n            };\r\n            this.previewStreamPath = true;\r\n            this.$nextTick(() =>\r\n                this.$refs.player.play(\"gb28181/\" + item.DeviceID)\r\n            );\r\n        },\r\n        sendPtz(options) {\r\n            const ptzCmd = getPTZCmd(options);\r\n            const ptzCmdStop = getPTZCmd({ type: PTZ_TYPE.stop 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\ No newline at end of file
diff --git a/ui/dist/plugin-gb28181.umd.min.js b/ui/dist/plugin-gb28181.umd.min.js
index 2e36473..48ff678 100644
--- a/ui/dist/plugin-gb28181.umd.min.js
+++ b/ui/dist/plugin-gb28181.umd.min.js
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diff --git a/ui/dist/plugin-gb28181.umd.min.js.map b/ui/dist/plugin-gb28181.umd.min.js.map
index f55ccc8..7f5ea9d 100644
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+++ b/ui/dist/plugin-gb28181.umd.min.js.map
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module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = \"fb15\");\n","export * from \"-!../../node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=style&index=0&id=76558468&scoped=true&lang=css&\"","'use strict'\n\nexports.byteLength = byteLength\nexports.toByteArray = toByteArray\nexports.fromByteArray = fromByteArray\n\nvar lookup = []\nvar revLookup = []\nvar Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array\n\nvar code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'\nfor (var i = 0, len = code.length; i < len; ++i) {\n  lookup[i] = code[i]\n  revLookup[code.charCodeAt(i)] = i\n}\n\n// Support decoding URL-safe base64 strings, as Node.js does.\n// See: https://en.wikipedia.org/wiki/Base64#URL_applications\nrevLookup['-'.charCodeAt(0)] = 62\nrevLookup['_'.charCodeAt(0)] = 63\n\nfunction getLens (b64) {\n  var len = b64.length\n\n  if (len % 4 > 0) {\n    throw new Error('Invalid string. Length must be a multiple of 4')\n  }\n\n  // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n  var validLen = b64.indexOf('=')\n  if (validLen === -1) validLen = len\n\n  var placeHoldersLen = validLen === len\n    ? 0\n    : 4 - (validLen % 4)\n\n  return [validLen, placeHoldersLen]\n}\n\n// base64 is 4/3 + up to two characters of the original data\nfunction byteLength (b64) {\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction _byteLength (b64, validLen, placeHoldersLen) {\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction toByteArray (b64) {\n  var tmp\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))\n\n  var curByte = 0\n\n  // if there are placeholders, only get up to the last complete 4 chars\n  var len = placeHoldersLen > 0\n    ? validLen - 4\n    : validLen\n\n  var i\n  for (i = 0; i < len; i += 4) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 18) |\n      (revLookup[b64.charCodeAt(i + 1)] << 12) |\n      (revLookup[b64.charCodeAt(i + 2)] << 6) |\n      revLookup[b64.charCodeAt(i + 3)]\n    arr[curByte++] = (tmp >> 16) & 0xFF\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 2) |\n      (revLookup[b64.charCodeAt(i + 1)] >> 4)\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 10) |\n      (revLookup[b64.charCodeAt(i + 1)] << 4) |\n      (revLookup[b64.charCodeAt(i + 2)] >> 2)\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  return arr\n}\n\nfunction tripletToBase64 (num) {\n  return lookup[num >> 18 & 0x3F] +\n    lookup[num >> 12 & 0x3F] +\n    lookup[num >> 6 & 0x3F] +\n    lookup[num & 0x3F]\n}\n\nfunction encodeChunk (uint8, start, end) {\n  var tmp\n  var output = []\n  for (var i = start; i < end; i += 3) {\n    tmp =\n      ((uint8[i] << 16) & 0xFF0000) +\n      ((uint8[i + 1] << 8) & 0xFF00) +\n      (uint8[i + 2] & 0xFF)\n    output.push(tripletToBase64(tmp))\n  }\n  return output.join('')\n}\n\nfunction fromByteArray (uint8) {\n  var tmp\n  var len = uint8.length\n  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes\n  var parts = []\n  var maxChunkLength = 16383 // must be multiple of 3\n\n  // go through the array every three bytes, we'll deal with trailing stuff later\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(\n      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)\n    ))\n  }\n\n  // pad the end with zeros, but make sure to not forget the extra bytes\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 2] +\n      lookup[(tmp << 4) & 0x3F] +\n      '=='\n    )\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 10] +\n      lookup[(tmp >> 4) & 0x3F] +\n      lookup[(tmp << 2) & 0x3F] +\n      '='\n    )\n  }\n\n  return parts.join('')\n}\n","export * from \"-!../node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../node_modules/vue-loader/lib/loaders/stylePostLoader.js!../node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../node_modules/cache-loader/dist/cjs.js??ref--0-0!../node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=style&index=0&id=77f8f0e9&scoped=true&lang=css&\"","// addapted from the document.currentScript polyfill by Adam Miller\n// MIT license\n// source: https://github.com/amiller-gh/currentScript-polyfill\n\n// added support for Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=1620505\n\n(function (root, factory) {\n  if (typeof define === 'function' && define.amd) {\n    define([], factory);\n  } else if (typeof module === 'object' && module.exports) {\n    module.exports = factory();\n  } else {\n    root.getCurrentScript = factory();\n  }\n}(typeof self !== 'undefined' ? self : this, function () {\n  function getCurrentScript () {\n    var descriptor = Object.getOwnPropertyDescriptor(document, 'currentScript')\n    // for chrome\n    if (!descriptor && 'currentScript' in document && document.currentScript) {\n      return document.currentScript\n    }\n\n    // for other browsers with native support for currentScript\n    if (descriptor && descriptor.get !== getCurrentScript && document.currentScript) {\n      return document.currentScript\n    }\n  \n    // IE 8-10 support script readyState\n    // IE 11+ & Firefox support stack trace\n    try {\n      throw new Error();\n    }\n    catch (err) {\n      // Find the second match for the \"at\" string to get file src url from stack.\n      var ieStackRegExp = /.*at [^(]*\\((.*):(.+):(.+)\\)$/ig,\n        ffStackRegExp = /@([^@]*):(\\d+):(\\d+)\\s*$/ig,\n        stackDetails = ieStackRegExp.exec(err.stack) || ffStackRegExp.exec(err.stack),\n        scriptLocation = (stackDetails && stackDetails[1]) || false,\n        line = (stackDetails && stackDetails[2]) || false,\n        currentLocation = document.location.href.replace(document.location.hash, ''),\n        pageSource,\n        inlineScriptSourceRegExp,\n        inlineScriptSource,\n        scripts = document.getElementsByTagName('script'); // Live NodeList collection\n  \n      if (scriptLocation === currentLocation) {\n        pageSource = document.documentElement.outerHTML;\n        inlineScriptSourceRegExp = new RegExp('(?:[^\\\\n]+?\\\\n){0,' + (line - 2) + '}[^<]*<script>([\\\\d\\\\D]*?)<\\\\/script>[\\\\d\\\\D]*', 'i');\n        inlineScriptSource = pageSource.replace(inlineScriptSourceRegExp, '$1').trim();\n      }\n  \n      for (var i = 0; i < scripts.length; i++) {\n        // If ready state is interactive, return the script tag\n        if (scripts[i].readyState === 'interactive') {\n          return scripts[i];\n        }\n  \n        // If src matches, return the script tag\n        if (scripts[i].src === scriptLocation) {\n          return scripts[i];\n        }\n  \n        // If inline source matches, return the script tag\n        if (\n          scriptLocation === currentLocation &&\n          scripts[i].innerHTML &&\n          scripts[i].innerHTML.trim() === inlineScriptSource\n        ) {\n          return scripts[i];\n        }\n      }\n  \n      // If no match, return null\n      return null;\n    }\n  };\n\n  return getCurrentScript\n}));\n","/**\n * Date:2020/11/9\n * Desc:\n */\n/**\n * Date:2020/11/2\n * Desc: ptz cmd 封装\n * cmd[0] //首字节以05H开头\n * cmd[1] //组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码\n *        //  校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16\n * cmd[2] //地址的低8位？？？什么地址，地址范围000h ~ FFFh(0~4095),其中000h为广播地址\n * cmd[3] //指令码\n * cmd[4] //数据1,水平控制速度、聚焦速度\n * cmd[5] //数据2，垂直控制速度、光圈速度\n * cmd[6] // 高4位为数据3=变倍控制速度，低4位为地址高4位\n */\n\nconst PTZ_TYPE = {\n    stop: 'stop',\n    right: 'right',\n    left: 'left',\n    up: 'up',\n    down: 'down',\n    leftUp: 'leftUp',\n    leftDown: 'leftDown',\n    rightUp: 'rightUp',\n    rightDown: 'rightDown',\n    zoomFar: 'zoomFar',\n    zoomNear: 'zoomNear',\n    apertureFar: 'apertureFar',\n    apertureNear: 'apertureNear',\n    focusFar: 'focusFar',\n    focusNear: 'focusNear',\n    setPos: 'setPos',\n    calPos: 'calPos',\n    delPos: 'delPos'\n};\n\nconst PTZ_CMD_TYPE = {\n    stop: 0x00,\n\n    right: 0x01,\n    left: 0x02,\n    up: 0x08,\n    down: 0x04,\n\n    leftUp: 0x0A,\n    leftDown: 0x06,\n    rightUp: 0x09,\n    rightDown: 0x05,\n\n    zoomFar: 0x10, // 镜头 放大\n    zoomNear: 0x20,  // 镜头 缩小\n\n    apertureFar: 0x48, // 光圈 缩小\n    apertureNear: 0x44, // 光圈 放大\n\n    focusFar: 0x42, // 聚焦 近\n    focusNear: 0x41, // 聚焦 远\n\n    setPos: 0x81,\n    calPos: 0x82,\n    delPos: 0x83\n};\n\nconst SPEED_ARRAY = [0x19, 0x32, 0x4b, 0x64, 0x7d, 0x96, 0xAF, 0xC8, 0xE1, 0xFA];\nconst POSITION_ARRAY = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10];\n\n// 获取 direction 方向型\n/**\n *\n * @param options\n *        type:\n *        speed:default 5\n *        index:\n * @returns {string}\n */\nfunction getPTZCmd(options) {\n    const {type, speed, index} = options;\n    const ptzSpeed = getPTZSpeed(speed);\n    let indexValue3, indexValue4, indexValue5, indexValue6;\n    indexValue3 = PTZ_CMD_TYPE[type];\n    switch (type) {\n        case PTZ_TYPE.up:\n        case PTZ_TYPE.down:\n        case PTZ_TYPE.apertureFar:\n        case PTZ_TYPE.apertureNear:\n            indexValue5 = ptzSpeed;\n            break;\n        case PTZ_TYPE.right:\n        case PTZ_TYPE.left:\n        case PTZ_TYPE.focusFar:\n        case PTZ_TYPE.focusNear:\n            indexValue4 = ptzSpeed;\n            break;\n        case PTZ_TYPE.leftUp:\n        case PTZ_TYPE.leftDown:\n        case PTZ_TYPE.rightUp:\n        case PTZ_TYPE.rightDown:\n            indexValue4 = ptzSpeed;\n            indexValue5 = ptzSpeed;\n            break;\n        case PTZ_TYPE.zoomFar:\n        case PTZ_TYPE.zoomNear:\n            indexValue6 = 0x10;\n            break;\n        case PTZ_TYPE.calPos:\n        case PTZ_TYPE.delPos:\n        case PTZ_TYPE.setPos:\n            indexValue5 = getPTZPositionIndex(index);\n            break;\n        default:\n            break;\n    }\n    return ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6);\n}\n\nfunction getPTZSpeed(speed) {\n    speed = speed || 5;\n    const speedIndex = speed - 1;\n    const ptzSpeed = SPEED_ARRAY[speedIndex] || SPEED_ARRAY[4];\n    return ptzSpeed;\n}\n\nfunction getPTZPositionIndex(index) {\n    return POSITION_ARRAY[index - 1];\n}\n\nfunction ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6) {\n    //\n    let cmd = Buffer.alloc(8);\n    // 首字节以05H开头\n    cmd[0] = 0xA5;\n    // 组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码\n    cmd[1] = 0x0F;\n    // 校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16\n    cmd[2] = 0x01;\n    //\n    if (indexValue3) {\n        cmd[3] = indexValue3;\n    }\n    if (indexValue4) {\n        cmd[4] = indexValue4;\n    }\n    if (indexValue5) {\n        cmd[5] = indexValue5;\n    }\n    if (indexValue6) {\n        cmd[6] = indexValue6;\n    }\n\n    cmd[7] = (cmd[0] + cmd[1] + cmd[2] + cmd[3] + cmd[4] + cmd[5] + cmd[6]) % 256;\n\n    return bytes2HexString(cmd);\n}\n\nfunction bytes2HexString(byte) {\n    let hexs = \"\";\n    for (let i = 0; i < byte.length; i++) {\n        let hex = (byte[i]).toString(16);\n        if (hex.length === 1) {\n            hex = '0' + hex;\n        }\n        hexs += hex.toUpperCase();\n    }\n    return hexs;\n}\n\nexport {\n    getPTZCmd,\n    PTZ_TYPE\n}\n","/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */\nexports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = ((value * c) - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\n/*\n * Export kMaxLength after typed array support is determined.\n */\nexports.kMaxLength = kMaxLength()\n\nfunction typedArraySupport () {\n  try {\n    var arr = new Uint8Array(1)\n    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}\n    return arr.foo() === 42 && // typed array instances can be augmented\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\nfunction createBuffer (that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length')\n  }\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length)\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length)\n    }\n    that.length = length\n  }\n\n  return that\n}\n\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\nfunction Buffer (arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length)\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error(\n        'If encoding is specified then the first argument must be a string'\n      )\n    }\n    return allocUnsafe(this, arg)\n  }\n  return from(this, arg, encodingOrOffset, length)\n}\n\nBuffer.poolSize = 8192 // not used by this implementation\n\n// TODO: Legacy, not needed anymore. Remove in next major version.\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype\n  return arr\n}\n\nfunction from (that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length)\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset)\n  }\n\n  return fromObject(that, value)\n}\n\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length)\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n  if (typeof Symbol !== 'undefined' && Symbol.species &&\n      Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    })\n  }\n}\n\nfunction assertSize (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number')\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative')\n  }\n}\n\nfunction alloc (that, size, fill, encoding) {\n  assertSize(size)\n  if (size <= 0) {\n    return createBuffer(that, size)\n  }\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string'\n      ? createBuffer(that, size).fill(fill, encoding)\n      : createBuffer(that, size).fill(fill)\n  }\n  return createBuffer(that, size)\n}\n\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding)\n}\n\nfunction allocUnsafe (that, size) {\n  assertSize(size)\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size)\n}\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size)\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8'\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding')\n  }\n\n  var length = byteLength(string, encoding) | 0\n  that = createBuffer(that, length)\n\n  var actual = that.write(string, encoding)\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual)\n  }\n\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0\n  that = createBuffer(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array, byteOffset, length) {\n  array.byteLength // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds')\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds')\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array)\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset)\n  } else {\n    array = new Uint8Array(array, byteOffset, length)\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array)\n  }\n  return that\n}\n\nfunction fromObject (that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0\n    that = createBuffer(that, len)\n\n    if (that.length === 0) {\n      return that\n    }\n\n    obj.copy(that, 0, 0, len)\n    return that\n  }\n\n  if (obj) {\n    if ((typeof ArrayBuffer !== 'undefined' &&\n        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0)\n      }\n      return fromArrayLike(that, obj)\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data)\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (length) {\n  if (+length != length) { // eslint-disable-line eqeqeq\n    length = 0\n  }\n  return Buffer.alloc(+length)\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i]\n      y = b[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers')\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length)\n  var pos = 0\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i]\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers')\n    }\n    buf.copy(buffer, pos)\n    pos += buf.length\n  }\n  return buffer\n}\n\nfunction byteLength (string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length\n  }\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&\n      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength\n  }\n  if (typeof string !== 'string') {\n    string = '' + string\n  }\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n  if (start === undefined || start < 0) {\n    start = 0\n  }\n  // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n  if (start > this.length) {\n    return ''\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length\n  }\n\n  if (end <= 0) {\n    return ''\n  }\n\n  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n  end >>>= 0\n  start >>>= 0\n\n  if (end <= start) {\n    return ''\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\n// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\nBuffer.prototype._isBuffer = true\n\nfunction swap (b, n, m) {\n  var i = b[n]\n  b[n] = b[m]\n  b[m] = i\n}\n\nBuffer.prototype.swap16 = function swap16 () {\n  var len = this.length\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits')\n  }\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1)\n  }\n  return this\n}\n\nBuffer.prototype.swap32 = function swap32 () {\n  var len = this.length\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits')\n  }\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3)\n    swap(this, i + 1, i + 2)\n  }\n  return this\n}\n\nBuffer.prototype.swap64 = function swap64 () {\n  var len = this.length\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits')\n  }\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7)\n    swap(this, i + 1, i + 6)\n    swap(this, i + 2, i + 5)\n    swap(this, i + 3, i + 4)\n  }\n  return this\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer')\n  }\n\n  if (start === undefined) {\n    start = 0\n  }\n  if (end === undefined) {\n    end = target ? target.length : 0\n  }\n  if (thisStart === undefined) {\n    thisStart = 0\n  }\n  if (thisEnd === undefined) {\n    thisEnd = this.length\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index')\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0\n  }\n  if (thisStart >= thisEnd) {\n    return -1\n  }\n  if (start >= end) {\n    return 1\n  }\n\n  start >>>= 0\n  end >>>= 0\n  thisStart >>>= 0\n  thisEnd >>>= 0\n\n  if (this === target) return 0\n\n  var x = thisEnd - thisStart\n  var y = end - start\n  var len = Math.min(x, y)\n\n  var thisCopy = this.slice(thisStart, thisEnd)\n  var targetCopy = target.slice(start, end)\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i]\n      y = targetCopy[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\n// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\nfunction bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1\n\n  // Normalize byteOffset\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset\n    byteOffset = 0\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000\n  }\n  byteOffset = +byteOffset  // Coerce to Number.\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : (buffer.length - 1)\n  }\n\n  // Normalize byteOffset: negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1\n    else byteOffset = buffer.length - 1\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0\n    else return -1\n  }\n\n  // Normalize val\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding)\n  }\n\n  // Finally, search either indexOf (if dir is true) or lastIndexOf\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1\n    }\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)\n  } else if (typeof val === 'number') {\n    val = val & 0xFF // Search for a byte value [0-255]\n    if (Buffer.TYPED_ARRAY_SUPPORT &&\n        typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)\n      }\n    }\n    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\nfunction arrayIndexOf (arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1\n  var arrLength = arr.length\n  var valLength = val.length\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase()\n    if (encoding === 'ucs2' || encoding === 'ucs-2' ||\n        encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1\n      }\n      indexSize = 2\n      arrLength /= 2\n      valLength /= 2\n      byteOffset /= 2\n    }\n  }\n\n  function read (buf, i) {\n    if (indexSize === 1) {\n      return buf[i]\n    } else {\n      return buf.readUInt16BE(i * indexSize)\n    }\n  }\n\n  var i\n  if (dir) {\n    var foundIndex = -1\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex\n        foundIndex = -1\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false\n          break\n        }\n      }\n      if (found) return i\n    }\n  }\n\n  return -1\n}\n\nBuffer.prototype.includes = function includes (val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)\n}\n\nBuffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) return i\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction latin1Write (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    throw new Error(\n      'Buffer.write(string, encoding, offset[, length]) is no longer supported'\n    )\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction latin1Slice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end)\n    newBuf.__proto__ = Buffer.prototype\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n  if (offset < 0) throw new RangeError('Index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    Uint8Array.prototype.set.call(\n      target,\n      this.subarray(start, start + len),\n      targetStart\n    )\n  }\n\n  return len\n}\n\n// Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\nBuffer.prototype.fill = function fill (val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start\n      start = 0\n      end = this.length\n    } else if (typeof end === 'string') {\n      encoding = end\n      end = this.length\n    }\n    if (val.length === 1) {\n      var code = val.charCodeAt(0)\n      if (code < 256) {\n        val = code\n      }\n    }\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string')\n    }\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding)\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255\n  }\n\n  // Invalid ranges are not set to a default, so can range check early.\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index')\n  }\n\n  if (end <= start) {\n    return this\n  }\n\n  start = start >>> 0\n  end = end === undefined ? this.length : end >>> 0\n\n  if (!val) val = 0\n\n  var i\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val)\n      ? val\n      : utf8ToBytes(new Buffer(val, encoding).toString())\n    var len = bytes.length\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    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341.333333 0 0 1 512 170.666667m0-42.666667a384 384 0 1 0 384 384A384 384 0 0 0 512 128z\"  /><path fill=\"#333333\" d=\"M298.666667 533.333333H170.666667a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM853.333333 533.333333h-128a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM512 320a21.333333 21.333333 0 0 1-21.333333-21.333333V170.666667a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333333zM512 874.666667a21.333333 21.333333 0 0 1-21.333333-21.333334v-128a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333334z\"  /></svg>\n      </div>\n      <div class=\"control5\">\n        <i-select v-model=\"ptzPositionIndex\" style=\"width: 100px\">\n          <Option v-for=\"n in 10\" :value=\"n\" :key=\"n\">预置点{{n}}</Option>\n        </i-select>\n        <i-button type=\"primary\" @click=\"ptzCmd(ptzType.setPos)\">设置</i-button>\n        <i-button type=\"success\" @click=\"ptzCmd(ptzType.calPos)\">调用</i-button>\n        <i-button type=\"error\" @click=\"ptzCmd(ptzType.delPos)\">删除</i-button>\n        速度：\n        <InputNumber :max=\"10\" :min=\"1\" v-model=\"ptzSpeed\"></InputNumber>\n      </div>\n    </div>\n    <div slot=\"footer\">\n      <mu-badge v-if=\"remoteSDP\">\n        <a slot=\"content\" :href=\"remoteSDPURL\" download=\"remoteSDP.txt\">remoteSDP</a>\n      </mu-badge>\n      <mu-badge v-if=\"localSDP\">\n        <a slot=\"content\" :href=\"localSDPURL\" download=\"localSDP.txt\">localSDP</a>\n      </mu-badge>\n    </div>\n  </Modal>\n</template>\n<script>\n  import {PTZ_TYPE} from \"../utils/ptz-cmd\";\n  const PTZ_DIRECTION_ARRAY = [PTZ_TYPE.up,PTZ_TYPE.right,PTZ_TYPE.down,PTZ_TYPE.left,PTZ_TYPE.leftUp,PTZ_TYPE.rightUp,PTZ_TYPE.leftDown,PTZ_TYPE.rightDown];\n  let pc = null;\nexport default {\n  data() {\n    return {\n      iceConnectionState: pc && pc.iceConnectionState,\n      stream: null,\n      localSDP: \"\",\n      remoteSDP: \"\",\n      remoteSDPURL: \"\",\n      localSDPURL: \"\",\n      streamPath: \"\",\n      ptzSpeed:5,\n      ptzPositionIndex:1,\n      ptzType:PTZ_TYPE,\n    };\n  },\n  props:{\n    PublicIP:String\n  },\n    methods: {\n        async play(streamPath) {\n            pc = new RTCPeerConnection();\n            pc.addTransceiver('video',{\n              direction:'recvonly'\n            })\n            this.streamPath = streamPath;\n            pc.onsignalingstatechange = e => {\n                //console.log(e);\n            };\n            pc.oniceconnectionstatechange = e => {\n                this.$toast.info(pc.iceConnectionState);\n                this.iceConnectionState = pc.iceConnectionState;\n            };\n            pc.onicecandidate = event => {\n                console.log(event)\n            };\n            pc.ontrack = event => {\n               // console.log(event);\n                if (event.track.kind == \"video\")\n                    this.stream = event.streams[0];\n            };\n            await pc.setLocalDescription(await pc.createOffer());\n            this.localSDP = pc.localDescription.sdp;\n            this.localSDPURL = URL.createObjectURL(\n                new Blob([this.localSDP], { type: \"text/plain\" })\n            );\n            const result = await this.ajax({\n                type: \"POST\",\n                processData: false,\n                data: JSON.stringify(pc.localDescription.toJSON()),\n                url: \"/webrtc/play?streamPath=\" + this.streamPath,\n                dataType: \"json\"\n            });\n            if (result.errmsg) {\n                this.$toast.error(result.errmsg);\n                return;\n            } else {\n                this.remoteSDP = result.sdp;\n                this.remoteSDPURL = URL.createObjectURL(new Blob([this.remoteSDP], { type: \"text/plain\" }));\n            }\n            await pc.setRemoteDescription(new RTCSessionDescription(result));\n        },\n        ptzCmdDirection(direction){\n          const type = PTZ_DIRECTION_ARRAY[direction-1];\n          this.ptzCmd(type);\n        },\n        startPtzCmdCycle(){\n          this.ptzCmd(PTZ_TYPE.right,true);\n        },\n        stopPtzCmdCycle(){\n          this.ptzCmd(PTZ_TYPE.stop);\n        },\n        ptzCmd(type,isCycling){\n          this.$emit('ptz',{type:type,speed:this.ptzSpeed,index:this.ptzPositionIndex,cycle:isCycling})\n        },\n        onClosePreview() {\n            pc.close();\n        }\n    }\n};\n</script>\n<style scoped>\n  .arrow1{\n    grid-column: 2;\n    grid-row: 1;\n  }\n  .arrow2{\n    transform: rotate(90deg);\n    grid-column: 3;\n    grid-row: 2;\n  }\n  .arrow3{\n    transform: rotate(180deg);\n    grid-column: 2;\n    grid-row: 3;\n  }\n  .arrow4{\n    transform: rotate(270deg);\n    grid-column: 1;\n    grid-row: 2;\n  }\n\n  .arrow5{\n    transform: rotate(-45deg);\n    grid-column: 1;\n    grid-row: 1;\n  }\n\n  .arrow6{\n    transform: rotate(45deg);\n    grid-column: 3;\n    grid-row: 1;\n  }\n\n  .arrow7{\n    transform: rotate(-135deg);\n    grid-column: 1;\n    grid-row: 3;\n  }\n\n  .arrow8{\n    transform: rotate(135deg);\n    grid-column: 3;\n    grid-row: 3;\n  }\n\n  .arrow9{\n    grid-column: 2;\n    grid-row: 2;\n  }\n\n.container {\n  position: relative;\n  height: 350px;\n}\n.control {\n  position: absolute;\n  top: 20px;\n  right: 0;\n  display: grid;\n  grid-template-columns: repeat(3, 33.33%);\n  grid-template-rows: repeat(3, 33.33%);\n  width: 192px;\n  height: 192px;\n}\n\n.control2{\n  top: 210px;\n}\n\n.control3{\n  top: 260px;\n}\n\n.control4{\n  top: 310px;\n}\n\n.control5{\n  top: 360px;\n}\n\n.control >* {\n  cursor: pointer;\n  fill: gray;\n  width: 50px;\n  height: 50px;\n}\n\n.control5 >*{\n  margin-right: 10px;\n}\n\n.control2 >*,.control3 >*,.control4 >*{\n  width: 40px;\n  height: 40px;\n}\n\n.control >*:hover,.cycling{\n  fill: cyan\n}\n\n\n\n</style>\n","import mod from \"-!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=script&lang=js&\"","/* globals __VUE_SSR_CONTEXT__ */\n\n// IMPORTANT: Do NOT use ES2015 features in this file (except for modules).\n// This module is a runtime utility for cleaner component module output and will\n// be included in the final webpack user bundle.\n\nexport default function normalizeComponent (\n  scriptExports,\n  render,\n  staticRenderFns,\n  functionalTemplate,\n  injectStyles,\n  scopeId,\n  moduleIdentifier, /* server only */\n  shadowMode /* vue-cli only */\n) {\n  // Vue.extend constructor export interop\n  var options = typeof scriptExports === 'function'\n    ? scriptExports.options\n    : scriptExports\n\n  // render functions\n  if (render) {\n    options.render = render\n    options.staticRenderFns = staticRenderFns\n    options._compiled = true\n  }\n\n  // functional template\n  if (functionalTemplate) {\n    options.functional = true\n  }\n\n  // scopedId\n  if (scopeId) {\n    options._scopeId = 'data-v-' + scopeId\n  }\n\n  var hook\n  if (moduleIdentifier) { // server build\n    hook = function (context) {\n      // 2.3 injection\n      context =\n        context || // cached call\n        (this.$vnode && this.$vnode.ssrContext) || // stateful\n        (this.parent && this.parent.$vnode && this.parent.$vnode.ssrContext) // functional\n      // 2.2 with runInNewContext: true\n      if (!context && typeof __VUE_SSR_CONTEXT__ !== 'undefined') {\n        context = __VUE_SSR_CONTEXT__\n      }\n      // inject component styles\n      if (injectStyles) {\n        injectStyles.call(this, context)\n      }\n      // register component module identifier for async chunk inferrence\n      if (context && context._registeredComponents) {\n        context._registeredComponents.add(moduleIdentifier)\n      }\n    }\n    // used by ssr in case component is cached and beforeCreate\n    // never gets called\n    options._ssrRegister = hook\n  } else if (injectStyles) {\n    hook = shadowMode\n      ? function () {\n        injectStyles.call(\n          this,\n          (options.functional ? this.parent : this).$root.$options.shadowRoot\n        )\n      }\n      : injectStyles\n  }\n\n  if (hook) {\n    if (options.functional) {\n      // for template-only hot-reload because in that case the render fn doesn't\n      // go through the normalizer\n      options._injectStyles = hook\n      // register for functional component in vue file\n      var originalRender = options.render\n      options.render = function renderWithStyleInjection (h, context) {\n        hook.call(context)\n        return originalRender(h, context)\n      }\n    } else {\n      // inject component registration as beforeCreate hook\n      var existing = options.beforeCreate\n      options.beforeCreate = existing\n        ? [].concat(existing, hook)\n        : [hook]\n    }\n  }\n\n  return {\n    exports: scriptExports,\n    options: options\n  }\n}\n","import { render, staticRenderFns } from \"./Player.vue?vue&type=template&id=76558468&scoped=true&\"\nimport script from \"./Player.vue?vue&type=script&lang=js&\"\nexport * from \"./Player.vue?vue&type=script&lang=js&\"\nimport style0 from \"./Player.vue?vue&type=style&index=0&id=76558468&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"76558468\",\n  null\n  \n)\n\nexport default component.exports","var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',{staticClass:\"player-wrap\"},[(_vm.rtcStream)?[_c('video',{attrs:{\"autoplay\":\"\",\"muted\":\"\",\"controls\":\"\"},domProps:{\"srcObject\":_vm.rtcStream,\"muted\":true}})]:_vm._e()],2)}\nvar staticRenderFns = []\n\nexport { render, staticRenderFns }","<template>\n    <div class=\"player-wrap\">\n        <template v-if=\"rtcStream\">\n            <video :srcObject.prop=\"rtcStream\" autoplay muted controls></video>\n        </template>\n    </div>\n</template>\n\n<script>\n    export default {\n        name: \"WebrtcPlayer\",\n        rtcPeerConnection: null,\n        data() {\n            return {\n                iceConnectionState: '',\n                rtcPeerConnectionInit: false,\n                rtcStream: null\n            }\n        },\n        props: {\n            streamPath: {\n                type: String,\n                default: ''\n            }\n        },\n        async created() {\n            await this.initRtcPeerConnection();\n            console.log('initRtcPeerConnectioned');\n            if (this.streamPath) {\n                await this.play(this.streamPath);\n                console.log('played');\n            }\n        },\n        methods: {\n            async initRtcPeerConnection() {\n                const rtcPeerConnection = new RTCPeerConnection();\n\n                rtcPeerConnection.addTransceiver('video', {\n                    direction: \"recvonly\"\n                });\n\n                rtcPeerConnection.onsignalingstatechange = e => {\n                    console.log('onsignalingstatechange', e);\n                };\n\n                rtcPeerConnection.oniceconnectionstatechange = e => {\n                    console.log('oniceconnectionstatechange', rtcPeerConnection.iceConnectionState);\n                };\n\n                rtcPeerConnection.onicecandidate = event => {\n                    console.log('onicecandidate', event);\n                };\n\n                rtcPeerConnection.ontrack = event => {\n                    console.log('ontrack', event);\n                    if (event.track.kind === \"video\") {\n                        this.rtcStream = event.streams[0];\n                    }\n                };\n\n                const rtcSessionDescriptionInit = await rtcPeerConnection.createOffer();\n                await rtcPeerConnection.setLocalDescription(rtcSessionDescriptionInit);\n                this.rtcPeerConnectionInit = true;\n                this.$options.rtcPeerConnection = rtcPeerConnection;\n            },\n\n            //\n            async play(streamPath) {\n                const rtcPeerConnection = this.$options.rtcPeerConnection;\n                const localDescriptionData = rtcPeerConnection.localDescription.toJSON();\n                const result = await this.ajax({\n                    type: \"POST\",\n                    processData: false,\n                    data: localDescriptionData,\n                    url: \"/webrtc/play?streamPath=\" + streamPath,\n                    dataType: \"json\"\n                });\n                if (result.error) {\n                    return;\n                }\n                //\n                rtcPeerConnection.setRemoteDescription(new RTCSessionDescription({\n                    type: result.type,\n                    sdp: result.sdp\n                }));\n            },\n            close() {\n                const rtcPeerConnection = this.$options.rtcPeerConnection;\n                rtcPeerConnection && rtcPeerConnection.close();\n            }\n        },\n        destroyed() {\n            this.close();\n        }\n    }\n</script>\n\n<style scoped>\n    .player-wrap {\n        width: 100%;\n        height: 100%;\n    }\n\n    .player-wrap video {\n        width: 100%;\n        height: 100%;\n    }\n</style>\n","import mod from \"-!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../node_modules/cache-loader/dist/cjs.js??ref--0-0!../../node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=script&lang=js&\"","import { render, staticRenderFns } from \"./Player2.vue?vue&type=template&id=379ce7fe&scoped=true&\"\nimport script from \"./Player2.vue?vue&type=script&lang=js&\"\nexport * from \"./Player2.vue?vue&type=script&lang=js&\"\nimport style0 from \"./Player2.vue?vue&type=style&index=0&id=379ce7fe&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"379ce7fe\",\n  null\n  \n)\n\nexport default component.exports","<template>\n    <div>\n        <div class=\"tabpanel\" v-if=\"$parent.titleTabActive === 0\">\n            <mu-data-table :data=\"Devices\" :columns=\"columns\">\n                <template #expand=\"prop\">\n                    <mu-data-table :data=\"prop.row.Channels\" :columns=\"columns2\">\n                        <template #default=\"{ row: item, $index }\">\n                            <td>{{ item.DeviceID }}</td>\n                            <td>{{ item.Name }}</td>\n                            <td>{{ item.Manufacturer }}</td>\n                            <td>{{ item.Address }}</td>\n                            <td>{{ item.Status }}</td>\n                            <td>\n                                <mu-button flat v-if=\"item.Connected\" @click=\"ptz(prop.row.ID, $index,item)\">云台\n                                </mu-button>\n                                <mu-button flat v-if=\"item.Connected\" @click=\"bye(prop.row.ID, $index)\">断开</mu-button>\n                                <mu-button v-else flat @click=\"invite(prop.row.ID, $index,item)\"\n                                >连接\n                                </mu-button\n                                >\n                            </td>\n                        </template>\n                    </mu-data-table>\n                </template>\n                <template #default=\"{ row: item }\">\n                    <td>{{ item.ID }}</td>\n                    <td>{{ item.Channels ? item.Channels.length : 0 }}</td>\n                    <td>\n                        <StartTime :value=\"item.RegisterTime\"></StartTime>\n                    </td>\n                    <td>\n                        <StartTime :value=\"item.UpdateTime\"></StartTime>\n                    </td>\n                    <td>{{ item.Status }}</td>\n                </template>\n            </mu-data-table>\n        </div>\n        <div class=\"tabpanel\" v-if=\"$parent.titleTabActive === 1\">\n            <div class=\"search\">\n            <i-select v-model=\"channelSelectedList\" multiple>\n              <Option v-for=\"(channel,index) in channelList\"\n                      :value=\"channel\"\n                      :label=\"channel.DeviceID + '(' + channel.Name + ')'\"\n                      :key=\"index\">\n              </Option>\n            </i-select>\n            </div>\n            <div class=\"flex-box\">\n                <template v-for=\"(channel,index) in channelSelectedList\">\n                    <div class=\"flex-item\" :key=\"index\" v-if=\"channel.ID\">\n                        <webrtc-player2 :stream-path=\"'gb28181/'+channel.ID\"></webrtc-player2>\n                    </div>\n                </template>\n            </div>\n        </div>\n        <webrtc-player ref=\"player\" @ptz=\"sendPtz\" v-model=\"previewStreamPath\" :PublicIP=\"PublicIP\"></webrtc-player>\n    </div>\n</template>\n<script>\n    import WebrtcPlayer from \"./components/Player\"\n    import WebrtcPlayer2 from \"./components/Player2\";\n    import {getPTZCmd, PTZ_TYPE} from \"./utils/ptz-cmd\";\n\n    export default {\n        components: {\n            WebrtcPlayer,\n            WebrtcPlayer2\n        },\n        props: {\n            ListenAddr: String\n        },\n        computed: {\n            PublicIP() {\n                return this.ListenAddr.split(\":\")[0]\n            }\n        },\n        data() {\n            return {\n                Devices: [], previewStreamPath: false,\n                channelList: [],\n                channelSelectedList:[],\n                context: {\n                    id: null,\n                    channel: 0,\n                    item: null\n                },\n                columns: Object.freeze(\n                    [\"设备号\", \"通道数\", \"注册时间\", \"更新时间\", \"状态\"].map(\n                        (title) => ({\n                            title,\n                        })\n                    )\n                ),\n                columns2: Object.freeze([\n                    \"通道编号\",\n                    \"名称\",\n                    \"厂商\",\n                    \"地址\",\n                    \"状态\",\n                    \"操作\",\n                ]).map((title) => ({title})),\n            };\n        },\n        created() {\n            this.fetchlist();\n        },\n        mounted() {\n            this.$parent.titleTabs = [\"列表\", \"N路播放\"];\n        },\n        methods: {\n            fetchlist() {\n                const listES = new EventSource(this.apiHost + \"/gb28181/list\");\n                listES.onmessage = (evt) => {\n                    if (!evt.data) return;\n                    this.Devices = JSON.parse(evt.data) || [];\n                    this.Devices.sort((a, b) => (a.ID > b.ID ? 1 : -1));\n                    let channelList =[]\n                    this.Devices.forEach((device)=>{\n                      const channels = device.Channels || [];\n                      if(channels.length > 0){\n                          channelList = channelList.concat(channels);\n                      }\n                    });\n                    if(channelList.length > 0){\n                        this.channelList = channelList;\n                    }\n                };\n                this.$once(\"hook:destroyed\", () => listES.close());\n            },\n            ptz(id, channel, item) {\n                this.context = {\n                    id, channel, item\n                };\n                this.previewStreamPath = true\n                this.$nextTick(() => this.$refs.player.play(\"gb28181/\" + item.DeviceID));\n            },\n            sendPtz(options) {\n                const ptzCmd = getPTZCmd(options);\n                const ptzCmdStop = getPTZCmd({type: PTZ_TYPE.stop});\n                this.ajax.get(\"/gb28181/control\", {\n                    id: this.context.id,\n                    channel: this.context.channel,\n                    ptzcmd: ptzCmd,\n                }).then(x => {\n                    if (options.type === PTZ_TYPE.stop || options.cycle === true) {\n                        return;\n                    }\n                    setTimeout(() => {\n                        this.ajax.get(\"/gb28181/control\", {\n                            id: this.context.id,\n                            channel: this.context.channel,\n                            ptzcmd: ptzCmdStop,\n                        });\n                    }, 500)\n                });\n            },\n            invite(id, channel, item) {\n                this.ajax.get(\"/gb28181/invite\", {id, channel}).then(x => {\n                    item.Connected = true\n                });\n            },\n            bye(id, channel, item) {\n                this.ajax.get(\"/gb28181/bye\", {id, channel}).then(x => {\n                    item.Connected = false\n                });\n            }\n        },\n    };\n</script>\n<style scoped>\n    .flex-box {\n        display: flex;\n        flex-flow: row wrap;\n        align-content: flex-start;\n    }\n\n    .flex-item {\n        flex: 0 0 33.3333%;\n        height: 275px;\n        padding: 10px;\n    }\n</style>\n","import mod from \"-!../node_modules/cache-loader/dist/cjs.js??ref--0-0!../node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../node_modules/cache-loader/dist/cjs.js??ref--0-0!../node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=script&lang=js&\"","import { render, staticRenderFns } from \"./App.vue?vue&type=template&id=77f8f0e9&scoped=true&\"\nimport script from \"./App.vue?vue&type=script&lang=js&\"\nexport * from \"./App.vue?vue&type=script&lang=js&\"\nimport style0 from \"./App.vue?vue&type=style&index=0&id=77f8f0e9&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"77f8f0e9\",\n  null\n  \n)\n\nexport default component.exports","import './setPublicPath'\nimport mod from '~entry'\nexport default mod\nexport * from '~entry'\n"],"sourceRoot":""}
\ No newline at end of file
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Length must be a multiple of 4')\n  }\n\n  // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n  var validLen = b64.indexOf('=')\n  if (validLen === -1) validLen = len\n\n  var placeHoldersLen = validLen === len\n    ? 0\n    : 4 - (validLen % 4)\n\n  return [validLen, placeHoldersLen]\n}\n\n// base64 is 4/3 + up to two characters of the original data\nfunction byteLength (b64) {\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction _byteLength (b64, validLen, placeHoldersLen) {\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction toByteArray (b64) {\n  var tmp\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))\n\n  var curByte = 0\n\n  // if there are placeholders, only get up to the last complete 4 chars\n  var len = placeHoldersLen > 0\n    ? validLen - 4\n    : validLen\n\n  var i\n  for (i = 0; i < len; i += 4) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 18) |\n      (revLookup[b64.charCodeAt(i + 1)] << 12) |\n      (revLookup[b64.charCodeAt(i + 2)] << 6) |\n      revLookup[b64.charCodeAt(i + 3)]\n    arr[curByte++] = (tmp >> 16) & 0xFF\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 2) |\n      (revLookup[b64.charCodeAt(i + 1)] >> 4)\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 10) |\n      (revLookup[b64.charCodeAt(i + 1)] << 4) |\n      (revLookup[b64.charCodeAt(i + 2)] >> 2)\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  return arr\n}\n\nfunction tripletToBase64 (num) {\n  return lookup[num >> 18 & 0x3F] +\n    lookup[num >> 12 & 0x3F] +\n    lookup[num >> 6 & 0x3F] +\n    lookup[num & 0x3F]\n}\n\nfunction encodeChunk (uint8, start, end) {\n  var tmp\n  var output = []\n  for (var i = start; i < end; i += 3) {\n    tmp =\n      ((uint8[i] << 16) & 0xFF0000) +\n      ((uint8[i + 1] << 8) & 0xFF00) +\n      (uint8[i + 2] & 0xFF)\n    output.push(tripletToBase64(tmp))\n  }\n  return output.join('')\n}\n\nfunction fromByteArray (uint8) {\n  var tmp\n  var len = uint8.length\n  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes\n  var parts = []\n  var maxChunkLength = 16383 // must be multiple of 3\n\n  // go through the array every three bytes, we'll deal with trailing stuff later\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(\n      uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)\n    ))\n  }\n\n  // pad the end with zeros, but make sure to not forget the extra bytes\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 2] +\n      lookup[(tmp << 4) & 0x3F] +\n      '=='\n    )\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 10] +\n      lookup[(tmp >> 4) & 0x3F] +\n      lookup[(tmp << 2) & 0x3F] +\n      '='\n    )\n  }\n\n  return parts.join('')\n}\n","import mod from \"-!../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=style&index=0&id=7bad0327&scoped=true&lang=css&\"; export default mod; export * from \"-!../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=style&index=0&id=7bad0327&scoped=true&lang=css&\"","import mod from \"-!../../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=style&index=0&id=a6774e8e&scoped=true&lang=css&\"; export default mod; export * from \"-!../../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=style&index=0&id=a6774e8e&scoped=true&lang=css&\"","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\n/*\n * Export kMaxLength after typed array support is determined.\n */\nexports.kMaxLength = kMaxLength()\n\nfunction typedArraySupport () {\n  try {\n    var arr = new Uint8Array(1)\n    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}\n    return arr.foo() === 42 && // typed array instances can be augmented\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\nfunction createBuffer (that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length')\n  }\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length)\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length)\n    }\n    that.length = length\n  }\n\n  return that\n}\n\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\nfunction Buffer (arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length)\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error(\n        'If encoding is specified then the first argument must be a string'\n      )\n    }\n    return allocUnsafe(this, arg)\n  }\n  return from(this, arg, encodingOrOffset, length)\n}\n\nBuffer.poolSize = 8192 // not used by this implementation\n\n// TODO: Legacy, not needed anymore. Remove in next major version.\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype\n  return arr\n}\n\nfunction from (that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length)\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset)\n  }\n\n  return fromObject(that, value)\n}\n\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length)\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n  if (typeof Symbol !== 'undefined' && Symbol.species &&\n      Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    })\n  }\n}\n\nfunction assertSize (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number')\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative')\n  }\n}\n\nfunction alloc (that, size, fill, encoding) {\n  assertSize(size)\n  if (size <= 0) {\n    return createBuffer(that, size)\n  }\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string'\n      ? createBuffer(that, size).fill(fill, encoding)\n      : createBuffer(that, size).fill(fill)\n  }\n  return createBuffer(that, size)\n}\n\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding)\n}\n\nfunction allocUnsafe (that, size) {\n  assertSize(size)\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size)\n}\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size)\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8'\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding')\n  }\n\n  var length = byteLength(string, encoding) | 0\n  that = createBuffer(that, length)\n\n  var actual = that.write(string, encoding)\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual)\n  }\n\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0\n  that = createBuffer(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array, byteOffset, length) {\n  array.byteLength // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds')\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds')\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array)\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset)\n  } else {\n    array = new Uint8Array(array, byteOffset, length)\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array)\n  }\n  return that\n}\n\nfunction fromObject (that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0\n    that = createBuffer(that, len)\n\n    if (that.length === 0) {\n      return that\n    }\n\n    obj.copy(that, 0, 0, len)\n    return that\n  }\n\n  if (obj) {\n    if ((typeof ArrayBuffer !== 'undefined' &&\n        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0)\n      }\n      return fromArrayLike(that, obj)\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data)\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (length) {\n  if (+length != length) { // eslint-disable-line eqeqeq\n    length = 0\n  }\n  return Buffer.alloc(+length)\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i]\n      y = b[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers')\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length)\n  var pos = 0\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i]\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers')\n    }\n    buf.copy(buffer, pos)\n    pos += buf.length\n  }\n  return buffer\n}\n\nfunction byteLength (string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length\n  }\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&\n      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength\n  }\n  if (typeof string !== 'string') {\n    string = '' + string\n  }\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n  if (start === undefined || start < 0) {\n    start = 0\n  }\n  // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n  if (start > this.length) {\n    return ''\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length\n  }\n\n  if (end <= 0) {\n    return ''\n  }\n\n  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n  end >>>= 0\n  start >>>= 0\n\n  if (end <= start) {\n    return ''\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\n// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\nBuffer.prototype._isBuffer = true\n\nfunction swap (b, n, m) {\n  var i = b[n]\n  b[n] = b[m]\n  b[m] = i\n}\n\nBuffer.prototype.swap16 = function swap16 () {\n  var len = this.length\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits')\n  }\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1)\n  }\n  return this\n}\n\nBuffer.prototype.swap32 = function swap32 () {\n  var len = this.length\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits')\n  }\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3)\n    swap(this, i + 1, i + 2)\n  }\n  return this\n}\n\nBuffer.prototype.swap64 = function swap64 () {\n  var len = this.length\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits')\n  }\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7)\n    swap(this, i + 1, i + 6)\n    swap(this, i + 2, i + 5)\n    swap(this, i + 3, i + 4)\n  }\n  return this\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer')\n  }\n\n  if (start === undefined) {\n    start = 0\n  }\n  if (end === undefined) {\n    end = target ? target.length : 0\n  }\n  if (thisStart === undefined) {\n    thisStart = 0\n  }\n  if (thisEnd === undefined) {\n    thisEnd = this.length\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index')\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0\n  }\n  if (thisStart >= thisEnd) {\n    return -1\n  }\n  if (start >= end) {\n    return 1\n  }\n\n  start >>>= 0\n  end >>>= 0\n  thisStart >>>= 0\n  thisEnd >>>= 0\n\n  if (this === target) return 0\n\n  var x = thisEnd - thisStart\n  var y = end - start\n  var len = Math.min(x, y)\n\n  var thisCopy = this.slice(thisStart, thisEnd)\n  var targetCopy = target.slice(start, end)\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i]\n      y = targetCopy[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\n// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\nfunction bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1\n\n  // Normalize byteOffset\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset\n    byteOffset = 0\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000\n  }\n  byteOffset = +byteOffset  // Coerce to Number.\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : (buffer.length - 1)\n  }\n\n  // Normalize byteOffset: negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1\n    else byteOffset = buffer.length - 1\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0\n    else return -1\n  }\n\n  // Normalize val\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding)\n  }\n\n  // Finally, search either indexOf (if dir is true) or lastIndexOf\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1\n    }\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)\n  } else if (typeof val === 'number') {\n    val = val & 0xFF // Search for a byte value [0-255]\n    if (Buffer.TYPED_ARRAY_SUPPORT &&\n        typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)\n      }\n    }\n    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\nfunction arrayIndexOf (arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1\n  var arrLength = arr.length\n  var valLength = val.length\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase()\n    if (encoding === 'ucs2' || encoding === 'ucs-2' ||\n        encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1\n      }\n      indexSize = 2\n      arrLength /= 2\n      valLength /= 2\n      byteOffset /= 2\n    }\n  }\n\n  function read (buf, i) {\n    if (indexSize === 1) {\n      return buf[i]\n    } else {\n      return buf.readUInt16BE(i * indexSize)\n    }\n  }\n\n  var i\n  if (dir) {\n    var foundIndex = -1\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex\n        foundIndex = -1\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false\n          break\n        }\n      }\n      if (found) return i\n    }\n  }\n\n  return -1\n}\n\nBuffer.prototype.includes = function includes (val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)\n}\n\nBuffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) return i\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction latin1Write (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    throw new Error(\n      'Buffer.write(string, encoding, offset[, length]) is no longer supported'\n    )\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction latin1Slice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end)\n    newBuf.__proto__ = Buffer.prototype\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n  if (offset < 0) throw new RangeError('Index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    Uint8Array.prototype.set.call(\n      target,\n      this.subarray(start, start + len),\n      targetStart\n    )\n  }\n\n  return len\n}\n\n// Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\nBuffer.prototype.fill = function fill (val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start\n      start = 0\n      end = this.length\n    } else if (typeof end === 'string') {\n      encoding = end\n      end = this.length\n    }\n    if (val.length === 1) {\n      var code = val.charCodeAt(0)\n      if (code < 256) {\n        val = code\n      }\n    }\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string')\n    }\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding)\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255\n  }\n\n  // Invalid ranges are not set to a default, so can range check early.\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index')\n  }\n\n  if (end <= start) {\n    return this\n  }\n\n  start = start >>> 0\n  end = end === undefined ? this.length : end >>> 0\n\n  if (!val) val = 0\n\n  var i\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val)\n      ? val\n      : utf8ToBytes(new Buffer(val, encoding).toString())\n    var len = bytes.length\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; ++i) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n\nfunction isnan (val) {\n  return val !== val // eslint-disable-line no-self-compare\n}\n","import mod from \"-!../../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=style&index=0&id=a326889c&scoped=true&lang=css&\"; export default mod; export * from \"-!../../../../plugin-webrtc/ui/node_modules/mini-css-extract-plugin/dist/loader.js??ref--6-oneOf-1-0!../../../../plugin-webrtc/ui/node_modules/css-loader/dist/cjs.js??ref--6-oneOf-1-1!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/loaders/stylePostLoader.js!../../../../plugin-webrtc/ui/node_modules/postcss-loader/src/index.js??ref--6-oneOf-1-2!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=style&index=0&id=a326889c&scoped=true&lang=css&\"","var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};\n","/**\r\n * Date:2020/11/9\r\n * Desc:\r\n */\r\n/**\r\n * Date:2020/11/2\r\n * Desc: ptz cmd 封装\r\n * cmd[0] //首字节以05H开头\r\n * cmd[1] //组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码\r\n *        //  校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16\r\n * cmd[2] //地址的低8位？？？什么地址，地址范围000h ~ FFFh(0~4095),其中000h为广播地址\r\n * cmd[3] //指令码\r\n * cmd[4] //数据1,水平控制速度、聚焦速度\r\n * cmd[5] //数据2，垂直控制速度、光圈速度\r\n * cmd[6] // 高4位为数据3=变倍控制速度，低4位为地址高4位\r\n */\r\n\r\nconst PTZ_TYPE = {\r\n    stop: 'stop',\r\n    right: 'right',\r\n    left: 'left',\r\n    up: 'up',\r\n    down: 'down',\r\n    leftUp: 'leftUp',\r\n    leftDown: 'leftDown',\r\n    rightUp: 'rightUp',\r\n    rightDown: 'rightDown',\r\n    zoomFar: 'zoomFar',\r\n    zoomNear: 'zoomNear',\r\n    apertureFar: 'apertureFar',\r\n    apertureNear: 'apertureNear',\r\n    focusFar: 'focusFar',\r\n    focusNear: 'focusNear',\r\n    setPos: 'setPos',\r\n    calPos: 'calPos',\r\n    delPos: 'delPos'\r\n};\r\n\r\nconst PTZ_CMD_TYPE = {\r\n    stop: 0x00,\r\n\r\n    right: 0x01,\r\n    left: 0x02,\r\n    up: 0x08,\r\n    down: 0x04,\r\n\r\n    leftUp: 0x0A,\r\n    leftDown: 0x06,\r\n    rightUp: 0x09,\r\n    rightDown: 0x05,\r\n\r\n    zoomFar: 0x10, // 镜头 放大\r\n    zoomNear: 0x20,  // 镜头 缩小\r\n\r\n    apertureFar: 0x48, // 光圈 缩小\r\n    apertureNear: 0x44, // 光圈 放大\r\n\r\n    focusFar: 0x42, // 聚焦 近\r\n    focusNear: 0x41, // 聚焦 远\r\n\r\n    setPos: 0x81,\r\n    calPos: 0x82,\r\n    delPos: 0x83\r\n};\r\n\r\nconst SPEED_ARRAY = [0x19, 0x32, 0x4b, 0x64, 0x7d, 0x96, 0xAF, 0xC8, 0xE1, 0xFA];\r\nconst POSITION_ARRAY = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10];\r\n\r\n// 获取 direction 方向型\r\n/**\r\n *\r\n * @param options\r\n *        type:\r\n *        speed:default 5\r\n *        index:\r\n * @returns {string}\r\n */\r\nfunction getPTZCmd(options) {\r\n    const {type, speed, index} = options;\r\n    const ptzSpeed = getPTZSpeed(speed);\r\n    let indexValue3, indexValue4, indexValue5, indexValue6;\r\n    indexValue3 = PTZ_CMD_TYPE[type];\r\n    switch (type) {\r\n        case PTZ_TYPE.up:\r\n        case PTZ_TYPE.down:\r\n        case PTZ_TYPE.apertureFar:\r\n        case PTZ_TYPE.apertureNear:\r\n            indexValue5 = ptzSpeed;\r\n            break;\r\n        case PTZ_TYPE.right:\r\n        case PTZ_TYPE.left:\r\n        case PTZ_TYPE.focusFar:\r\n        case PTZ_TYPE.focusNear:\r\n            indexValue4 = ptzSpeed;\r\n            break;\r\n        case PTZ_TYPE.leftUp:\r\n        case PTZ_TYPE.leftDown:\r\n        case PTZ_TYPE.rightUp:\r\n        case PTZ_TYPE.rightDown:\r\n            indexValue4 = ptzSpeed;\r\n            indexValue5 = ptzSpeed;\r\n            break;\r\n        case PTZ_TYPE.zoomFar:\r\n        case PTZ_TYPE.zoomNear:\r\n            indexValue6 = 0x10;\r\n            break;\r\n        case PTZ_TYPE.calPos:\r\n        case PTZ_TYPE.delPos:\r\n        case PTZ_TYPE.setPos:\r\n            indexValue5 = getPTZPositionIndex(index);\r\n            break;\r\n        default:\r\n            break;\r\n    }\r\n    return ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6);\r\n}\r\n\r\nfunction getPTZSpeed(speed) {\r\n    speed = speed || 5;\r\n    const speedIndex = speed - 1;\r\n    const ptzSpeed = SPEED_ARRAY[speedIndex] || SPEED_ARRAY[4];\r\n    return ptzSpeed;\r\n}\r\n\r\nfunction getPTZPositionIndex(index) {\r\n    return POSITION_ARRAY[index - 1];\r\n}\r\n\r\nfunction ptzCmdToString(indexValue3, indexValue4, indexValue5, indexValue6) {\r\n    //\r\n    let cmd = Buffer.alloc(8);\r\n    // 首字节以05H开头\r\n    cmd[0] = 0xA5;\r\n    // 组合码，高4位为版本信息v1.0,版本信息0H，低四位为校验码\r\n    cmd[1] = 0x0F;\r\n    // 校验码 = (cmd[0]的高4位+cmd[0]的低4位+cmd[1]的高4位)%16\r\n    cmd[2] = 0x01;\r\n    //\r\n    if (indexValue3) {\r\n        cmd[3] = indexValue3;\r\n    }\r\n    if (indexValue4) {\r\n        cmd[4] = indexValue4;\r\n    }\r\n    if (indexValue5) {\r\n        cmd[5] = indexValue5;\r\n    }\r\n    if (indexValue6) {\r\n        cmd[6] = indexValue6;\r\n    }\r\n\r\n    cmd[7] = (cmd[0] + cmd[1] + cmd[2] + cmd[3] + cmd[4] + cmd[5] + cmd[6]) % 256;\r\n\r\n    return bytes2HexString(cmd);\r\n}\r\n\r\nfunction bytes2HexString(byte) {\r\n    let hexs = \"\";\r\n    for (let i = 0; i < byte.length; i++) {\r\n        let hex = (byte[i]).toString(16);\r\n        if (hex.length === 1) {\r\n            hex = '0' + hex;\r\n        }\r\n        hexs += hex.toUpperCase();\r\n    }\r\n    return hexs;\r\n}\r\n\r\nexport {\r\n    getPTZCmd,\r\n    PTZ_TYPE\r\n}\r\n","exports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = ((value * c) - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n","var g;\n\n// This works in non-strict mode\ng = (function() {\n\treturn this;\n})();\n\ntry {\n\t// This works if eval is allowed (see CSP)\n\tg = g || new Function(\"return this\")();\n} catch (e) {\n\t// This works if the window reference is available\n\tif (typeof window === \"object\") g = window;\n}\n\n// g can still be undefined, but nothing to do about it...\n// We return undefined, instead of nothing here, so it's\n// easier to handle this case. if(!global) { ...}\n\nmodule.exports = g;\n","// This file is imported into lib/wc client bundles.\n\nif (typeof window !== 'undefined') {\n  var currentScript = window.document.currentScript\n  if (process.env.NEED_CURRENTSCRIPT_POLYFILL) {\n    var getCurrentScript = require('@soda/get-current-script')\n    currentScript = getCurrentScript()\n\n    // for backward compatibility, because previously we directly included the polyfill\n    if (!('currentScript' in document)) {\n      Object.defineProperty(document, 'currentScript', { get: getCurrentScript })\n    }\n  }\n\n  var src = currentScript && currentScript.src.match(/(.+\\/)[^/]+\\.js(\\?.*)?$/)\n  if (src) {\n    __webpack_public_path__ = src[1] // eslint-disable-line\n  }\n}\n\n// Indicate to webpack that this file can be concatenated\nexport default null\n","var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',[(_vm.$parent.titleTabActive === 0)?_c('div',{staticClass:\"tabpanel\"},[_c('mu-data-table',{attrs:{\"data\":_vm.Devices,\"columns\":_vm.columns},scopedSlots:_vm._u([{key:\"expand\",fn:function(prop){return [_c('mu-data-table',{attrs:{\"data\":prop.row.Channels,\"columns\":_vm.columns2},scopedSlots:_vm._u([{key:\"default\",fn:function(ref){\nvar item = ref.row;\nvar $index = ref.$index;\nreturn [_c('td',[_vm._v(_vm._s(item.DeviceID))]),_c('td',[_vm._v(_vm._s(item.Name))]),_c('td',[_vm._v(_vm._s(item.Manufacturer))]),_c('td',[_vm._v(_vm._s(item.Address))]),_c('td',[_vm._v(_vm._s(item.Status))]),_c('td',[(item.Connected)?_c('mu-button',{attrs:{\"flat\":\"\"},on:{\"click\":function($event){return _vm.ptz(prop.row.ID, $index, item)}}},[_vm._v(\"云台 \")]):_vm._e(),(item.Connected)?_c('mu-button',{attrs:{\"flat\":\"\"},on:{\"click\":function($event){return _vm.bye(prop.row.ID, $index)}}},[_vm._v(\"断开\")]):_c('mu-button',{attrs:{\"flat\":\"\"},on:{\"click\":function($event){return _vm.invite(prop.row.ID, $index, item)}}},[_vm._v(\"连接 \")])],1)]}}],null,true)})]}},{key:\"default\",fn:function(ref){\nvar item = ref.row;\nreturn [_c('td',[_vm._v(_vm._s(item.ID))]),_c('td',[_vm._v(_vm._s(item.Addr))]),_c('td',[_vm._v(_vm._s(item.Channels ? item.Channels.length : 0))]),_c('td',[_c('StartTime',{attrs:{\"value\":item.RegisterTime}})],1),_c('td',[_c('StartTime',{attrs:{\"value\":item.UpdateTime}})],1),_c('td',[_vm._v(_vm._s(item.Status))])]}}],null,false,2809573184)})],1):_vm._e(),(_vm.$parent.titleTabActive === 1)?_c('div',{staticClass:\"tabpanel\"},[_c('div',{staticClass:\"search\"},[_c('i-select',{attrs:{\"multiple\":\"\"},model:{value:(_vm.channelSelectedList),callback:function ($$v) {_vm.channelSelectedList=$$v},expression:\"channelSelectedList\"}},_vm._l((_vm.channelList),function(channel,index){return _c('Option',{key:index,attrs:{\"value\":channel,\"label\":channel.DeviceID + '(' + channel.Name + ')'}})}),1)],1),_c('div',{staticClass:\"flex-box\"},[_vm._l((_vm.channelSelectedList),function(channel,index){return [(channel.ID)?_c('div',{key:index,staticClass:\"flex-item\"},[_c('webrtc-player2',{attrs:{\"stream-path\":'gb28181/' + channel.ID}})],1):_vm._e()]})],2)]):_vm._e(),_c('webrtc-player',{ref:\"player\",attrs:{\"PublicIP\":_vm.PublicIP},on:{\"ptz\":_vm.sendPtz},model:{value:(_vm.previewStreamPath),callback:function ($$v) {_vm.previewStreamPath=$$v},expression:\"previewStreamPath\"}})],1)}\nvar staticRenderFns = []\n\nexport { render, staticRenderFns }","var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('Modal',_vm._g(_vm._b({attrs:{\"draggable\":\"\",\"width\":\"750\",\"title\":_vm.streamPath},on:{\"on-ok\":_vm.onClosePreview,\"on-cancel\":_vm.onClosePreview}},'Modal',_vm.$attrs,false),_vm.$listeners),[_c('div',{staticClass:\"container\"},[_c('video',{ref:\"webrtc\",attrs:{\"width\":\"488\",\"height\":\"275\",\"autoplay\":\"\",\"muted\":\"\",\"controls\":\"\"},domProps:{\"srcObject\":_vm.stream,\"muted\":true}}),_c('div',{staticClass:\"control\"},[_vm._l((8),function(n){return _c('svg',{class:'arrow'+n,attrs:{\"viewBox\":\"0 0 1024 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533.333333H170.666667a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM853.333333 533.333333h-128a21.333333 21.333333 0 0 1 0-42.666666h128a21.333333 21.333333 0 0 1 0 42.666666zM512 320a21.333333 21.333333 0 0 1-21.333333-21.333333V170.666667a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333333zM512 874.666667a21.333333 21.333333 0 0 1-21.333333-21.333334v-128a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333334z\"}})])]),_c('div',{staticClass:\"control5\"},[_c('i-select',{staticStyle:{\"width\":\"100px\"},model:{value:(_vm.ptzPositionIndex),callback:function ($$v) {_vm.ptzPositionIndex=$$v},expression:\"ptzPositionIndex\"}},_vm._l((10),function(n){return _c('Option',{key:n,attrs:{\"value\":n}},[_vm._v(\"预置点\"+_vm._s(n))])}),1),_c('i-button',{attrs:{\"type\":\"primary\"},on:{\"click\":function($event){return _vm.ptzCmd(_vm.ptzType.setPos)}}},[_vm._v(\"设置\")]),_c('i-button',{attrs:{\"type\":\"success\"},on:{\"click\":function($event){return _vm.ptzCmd(_vm.ptzType.calPos)}}},[_vm._v(\"调用\")]),_c('i-button',{attrs:{\"type\":\"error\"},on:{\"click\":function($event){return _vm.ptzCmd(_vm.ptzType.delPos)}}},[_vm._v(\"删除\")]),_vm._v(\" 速度： \"),_c('InputNumber',{attrs:{\"max\":10,\"min\":1},model:{value:(_vm.ptzSpeed),callback:function ($$v) {_vm.ptzSpeed=$$v},expression:\"ptzSpeed\"}})],1)]),_c('div',{attrs:{\"slot\":\"footer\"},slot:\"footer\"},[(_vm.remoteSDP)?_c('mu-badge',[_c('a',{attrs:{\"slot\":\"content\",\"href\":_vm.remoteSDPURL,\"download\":\"remoteSDP.txt\"},slot:\"content\"},[_vm._v(\"remoteSDP\")])]):_vm._e(),(_vm.localSDP)?_c('mu-badge',[_c('a',{attrs:{\"slot\":\"content\",\"href\":_vm.localSDPURL,\"download\":\"localSDP.txt\"},slot:\"content\"},[_vm._v(\"localSDP\")])]):_vm._e()],1)])}\nvar staticRenderFns = []\n\nexport { render, staticRenderFns }","<template>\r\n  <Modal\r\n    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874.666667a21.333333 21.333333 0 0 1-21.333333-21.333334v-128a21.333333 21.333333 0 0 1 42.666666 0v128a21.333333 21.333333 0 0 1-21.333333 21.333334z\"  /></svg>\r\n      </div>\r\n      <div class=\"control5\">\r\n        <i-select v-model=\"ptzPositionIndex\" style=\"width: 100px\">\r\n          <Option v-for=\"n in 10\" :value=\"n\" :key=\"n\">预置点{{n}}</Option>\r\n        </i-select>\r\n        <i-button type=\"primary\" @click=\"ptzCmd(ptzType.setPos)\">设置</i-button>\r\n        <i-button type=\"success\" @click=\"ptzCmd(ptzType.calPos)\">调用</i-button>\r\n        <i-button type=\"error\" @click=\"ptzCmd(ptzType.delPos)\">删除</i-button>\r\n        速度：\r\n        <InputNumber :max=\"10\" :min=\"1\" v-model=\"ptzSpeed\"></InputNumber>\r\n      </div>\r\n    </div>\r\n    <div slot=\"footer\">\r\n      <mu-badge v-if=\"remoteSDP\">\r\n        <a slot=\"content\" :href=\"remoteSDPURL\" download=\"remoteSDP.txt\">remoteSDP</a>\r\n      </mu-badge>\r\n      <mu-badge v-if=\"localSDP\">\r\n        <a slot=\"content\" :href=\"localSDPURL\" download=\"localSDP.txt\">localSDP</a>\r\n      </mu-badge>\r\n    </div>\r\n  </Modal>\r\n</template>\r\n<script>\r\n  import {PTZ_TYPE} from \"../utils/ptz-cmd\";\r\n  const PTZ_DIRECTION_ARRAY = [PTZ_TYPE.up,PTZ_TYPE.right,PTZ_TYPE.down,PTZ_TYPE.left,PTZ_TYPE.leftUp,PTZ_TYPE.rightUp,PTZ_TYPE.leftDown,PTZ_TYPE.rightDown];\r\n  let pc = null;\r\nexport default {\r\n  data() {\r\n    return {\r\n      iceConnectionState: pc && pc.iceConnectionState,\r\n      stream: null,\r\n      localSDP: \"\",\r\n      remoteSDP: \"\",\r\n      remoteSDPURL: \"\",\r\n      localSDPURL: \"\",\r\n      streamPath: \"\",\r\n      ptzSpeed:5,\r\n      ptzPositionIndex:1,\r\n      ptzType:PTZ_TYPE,\r\n    };\r\n  },\r\n  props:{\r\n    PublicIP:String\r\n  },\r\n    methods: {\r\n        async play(streamPath) {\r\n            pc = new RTCPeerConnection();\r\n            pc.addTransceiver('video',{\r\n              direction:'recvonly'\r\n            })\r\n            this.streamPath = streamPath;\r\n            pc.onsignalingstatechange = e => {\r\n                //console.log(e);\r\n            };\r\n            pc.oniceconnectionstatechange = e => {\r\n                this.$toast.info(pc.iceConnectionState);\r\n                this.iceConnectionState = pc.iceConnectionState;\r\n            };\r\n            pc.onicecandidate = event => {\r\n                console.log(event)\r\n            };\r\n            pc.ontrack = event => {\r\n               // console.log(event);\r\n                if (event.track.kind == \"video\")\r\n                    this.stream = event.streams[0];\r\n            };\r\n            await pc.setLocalDescription(await pc.createOffer());\r\n            this.localSDP = pc.localDescription.sdp;\r\n            this.localSDPURL = URL.createObjectURL(\r\n                new Blob([this.localSDP], { type: \"text/plain\" })\r\n            );\r\n            const result = await this.ajax({\r\n                type: \"POST\",\r\n                processData: false,\r\n                data: JSON.stringify(pc.localDescription.toJSON()),\r\n                url: \"/webrtc/play?streamPath=\" + this.streamPath,\r\n                dataType: \"json\"\r\n            });\r\n            if (result.errmsg) {\r\n                this.$toast.error(result.errmsg);\r\n                return;\r\n            } else {\r\n                this.remoteSDP = result.sdp;\r\n                this.remoteSDPURL = URL.createObjectURL(new Blob([this.remoteSDP], { type: \"text/plain\" }));\r\n            }\r\n            await pc.setRemoteDescription(new RTCSessionDescription(result));\r\n        },\r\n        ptzCmdDirection(direction){\r\n          const type = PTZ_DIRECTION_ARRAY[direction-1];\r\n          this.ptzCmd(type);\r\n        },\r\n        startPtzCmdCycle(){\r\n          this.ptzCmd(PTZ_TYPE.right,true);\r\n        },\r\n        stopPtzCmdCycle(){\r\n          this.ptzCmd(PTZ_TYPE.stop);\r\n        },\r\n        ptzCmd(type,isCycling){\r\n          this.$emit('ptz',{type:type,speed:this.ptzSpeed,index:this.ptzPositionIndex,cycle:isCycling})\r\n        },\r\n        onClosePreview() {\r\n            pc.close();\r\n        }\r\n    }\r\n};\r\n</script>\r\n<style scoped>\r\n  .arrow1{\r\n    grid-column: 2;\r\n    grid-row: 1;\r\n  }\r\n  .arrow2{\r\n    transform: rotate(90deg);\r\n    grid-column: 3;\r\n    grid-row: 2;\r\n  }\r\n  .arrow3{\r\n    transform: rotate(180deg);\r\n    grid-column: 2;\r\n    grid-row: 3;\r\n  }\r\n  .arrow4{\r\n    transform: rotate(270deg);\r\n    grid-column: 1;\r\n    grid-row: 2;\r\n  }\r\n\r\n  .arrow5{\r\n    transform: rotate(-45deg);\r\n    grid-column: 1;\r\n    grid-row: 1;\r\n  }\r\n\r\n  .arrow6{\r\n    transform: rotate(45deg);\r\n    grid-column: 3;\r\n    grid-row: 1;\r\n  }\r\n\r\n  .arrow7{\r\n    transform: rotate(-135deg);\r\n    grid-column: 1;\r\n    grid-row: 3;\r\n  }\r\n\r\n  .arrow8{\r\n    transform: rotate(135deg);\r\n    grid-column: 3;\r\n    grid-row: 3;\r\n  }\r\n\r\n  .arrow9{\r\n    grid-column: 2;\r\n    grid-row: 2;\r\n  }\r\n\r\n.container {\r\n  position: relative;\r\n  height: 350px;\r\n}\r\n.control {\r\n  position: absolute;\r\n  top: 20px;\r\n  right: 0;\r\n  display: grid;\r\n  grid-template-columns: repeat(3, 33.33%);\r\n  grid-template-rows: repeat(3, 33.33%);\r\n  width: 192px;\r\n  height: 192px;\r\n}\r\n\r\n.control2{\r\n  top: 210px;\r\n}\r\n\r\n.control3{\r\n  top: 260px;\r\n}\r\n\r\n.control4{\r\n  top: 310px;\r\n}\r\n\r\n.control5{\r\n  top: 360px;\r\n}\r\n\r\n.control >* {\r\n  cursor: pointer;\r\n  fill: gray;\r\n  width: 50px;\r\n  height: 50px;\r\n}\r\n\r\n.control5 >*{\r\n  margin-right: 10px;\r\n}\r\n\r\n.control2 >*,.control3 >*,.control4 >*{\r\n  width: 40px;\r\n  height: 40px;\r\n}\r\n\r\n.control >*:hover,.cycling{\r\n  fill: cyan\r\n}\r\n\r\n\r\n\r\n</style>\r\n","import mod from \"-!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player.vue?vue&type=script&lang=js&\"","/* globals __VUE_SSR_CONTEXT__ */\n\n// IMPORTANT: Do NOT use ES2015 features in this file (except for modules).\n// This module is a runtime utility for cleaner component module output and will\n// be included in the final webpack user bundle.\n\nexport default function normalizeComponent (\n  scriptExports,\n  render,\n  staticRenderFns,\n  functionalTemplate,\n  injectStyles,\n  scopeId,\n  moduleIdentifier, /* server only */\n  shadowMode /* vue-cli only */\n) {\n  // Vue.extend constructor export interop\n  var options = typeof scriptExports === 'function'\n    ? scriptExports.options\n    : scriptExports\n\n  // render functions\n  if (render) {\n    options.render = render\n    options.staticRenderFns = staticRenderFns\n    options._compiled = true\n  }\n\n  // functional template\n  if (functionalTemplate) {\n    options.functional = true\n  }\n\n  // scopedId\n  if (scopeId) {\n    options._scopeId = 'data-v-' + scopeId\n  }\n\n  var hook\n  if (moduleIdentifier) { // server build\n    hook = function (context) {\n      // 2.3 injection\n      context =\n        context || // cached call\n        (this.$vnode && this.$vnode.ssrContext) || // stateful\n        (this.parent && this.parent.$vnode && this.parent.$vnode.ssrContext) // functional\n      // 2.2 with runInNewContext: true\n      if (!context && typeof __VUE_SSR_CONTEXT__ !== 'undefined') {\n        context = __VUE_SSR_CONTEXT__\n      }\n      // inject component styles\n      if (injectStyles) {\n        injectStyles.call(this, context)\n      }\n      // register component module identifier for async chunk inferrence\n      if (context && context._registeredComponents) {\n        context._registeredComponents.add(moduleIdentifier)\n      }\n    }\n    // used by ssr in case component is cached and beforeCreate\n    // never gets called\n    options._ssrRegister = hook\n  } else if (injectStyles) {\n    hook = shadowMode\n      ? function () {\n        injectStyles.call(\n          this,\n          (options.functional ? this.parent : this).$root.$options.shadowRoot\n        )\n      }\n      : injectStyles\n  }\n\n  if (hook) {\n    if (options.functional) {\n      // for template-only hot-reload because in that case the render fn doesn't\n      // go through the normalizer\n      options._injectStyles = hook\n      // register for functional component in vue file\n      var originalRender = options.render\n      options.render = function renderWithStyleInjection (h, context) {\n        hook.call(context)\n        return originalRender(h, context)\n      }\n    } else {\n      // inject component registration as beforeCreate hook\n      var existing = options.beforeCreate\n      options.beforeCreate = existing\n        ? [].concat(existing, hook)\n        : [hook]\n    }\n  }\n\n  return {\n    exports: scriptExports,\n    options: options\n  }\n}\n","import { render, staticRenderFns } from \"./Player.vue?vue&type=template&id=a6774e8e&scoped=true&\"\nimport script from \"./Player.vue?vue&type=script&lang=js&\"\nexport * from \"./Player.vue?vue&type=script&lang=js&\"\nimport style0 from \"./Player.vue?vue&type=style&index=0&id=a6774e8e&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"a6774e8e\",\n  null\n  \n)\n\nexport default component.exports","var render = function () {var _vm=this;var _h=_vm.$createElement;var _c=_vm._self._c||_h;return _c('div',{staticClass:\"player-wrap\"},[(_vm.rtcStream)?[_c('video',{attrs:{\"autoplay\":\"\",\"muted\":\"\",\"controls\":\"\"},domProps:{\"srcObject\":_vm.rtcStream,\"muted\":true}})]:_vm._e()],2)}\nvar staticRenderFns = []\n\nexport { render, staticRenderFns }","<template>\r\n    <div class=\"player-wrap\">\r\n        <template v-if=\"rtcStream\">\r\n            <video :srcObject.prop=\"rtcStream\" autoplay muted controls></video>\r\n        </template>\r\n    </div>\r\n</template>\r\n\r\n<script>\r\n    export default {\r\n        name: \"WebrtcPlayer\",\r\n        rtcPeerConnection: null,\r\n        data() {\r\n            return {\r\n                iceConnectionState: '',\r\n                rtcPeerConnectionInit: false,\r\n                rtcStream: null\r\n            }\r\n        },\r\n        props: {\r\n            streamPath: {\r\n                type: String,\r\n                default: ''\r\n            }\r\n        },\r\n        async created() {\r\n            await this.initRtcPeerConnection();\r\n            console.log('initRtcPeerConnectioned');\r\n            if (this.streamPath) {\r\n                await this.play(this.streamPath);\r\n                console.log('played');\r\n            }\r\n        },\r\n        methods: {\r\n            async initRtcPeerConnection() {\r\n                const rtcPeerConnection = new RTCPeerConnection();\r\n\r\n                rtcPeerConnection.addTransceiver('video', {\r\n                    direction: \"recvonly\"\r\n                });\r\n\r\n                rtcPeerConnection.onsignalingstatechange = e => {\r\n                    console.log('onsignalingstatechange', e);\r\n                };\r\n\r\n                rtcPeerConnection.oniceconnectionstatechange = e => {\r\n                    console.log('oniceconnectionstatechange', rtcPeerConnection.iceConnectionState);\r\n                };\r\n\r\n                rtcPeerConnection.onicecandidate = event => {\r\n                    console.log('onicecandidate', event);\r\n                };\r\n\r\n                rtcPeerConnection.ontrack = event => {\r\n                    console.log('ontrack', event);\r\n                    if (event.track.kind === \"video\") {\r\n                        this.rtcStream = event.streams[0];\r\n                    }\r\n                };\r\n\r\n                const rtcSessionDescriptionInit = await rtcPeerConnection.createOffer();\r\n                await rtcPeerConnection.setLocalDescription(rtcSessionDescriptionInit);\r\n                this.rtcPeerConnectionInit = true;\r\n                this.$options.rtcPeerConnection = rtcPeerConnection;\r\n            },\r\n\r\n            //\r\n            async play(streamPath) {\r\n                const rtcPeerConnection = this.$options.rtcPeerConnection;\r\n                const localDescriptionData = rtcPeerConnection.localDescription.toJSON();\r\n                const result = await this.ajax({\r\n                    type: \"POST\",\r\n                    processData: false,\r\n                    data: localDescriptionData,\r\n                    url: \"/webrtc/play?streamPath=\" + streamPath,\r\n                    dataType: \"json\"\r\n                });\r\n                if (result.error) {\r\n                    return;\r\n                }\r\n                //\r\n                rtcPeerConnection.setRemoteDescription(new RTCSessionDescription({\r\n                    type: result.type,\r\n                    sdp: result.sdp\r\n                }));\r\n            },\r\n            close() {\r\n                const rtcPeerConnection = this.$options.rtcPeerConnection;\r\n                rtcPeerConnection && rtcPeerConnection.close();\r\n            }\r\n        },\r\n        destroyed() {\r\n            this.close();\r\n        }\r\n    }\r\n</script>\r\n\r\n<style scoped>\r\n    .player-wrap {\r\n        width: 100%;\r\n        height: 100%;\r\n    }\r\n\r\n    .player-wrap video {\r\n        width: 100%;\r\n        height: 100%;\r\n    }\r\n</style>\r\n","import mod from \"-!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./Player2.vue?vue&type=script&lang=js&\"","import { render, staticRenderFns } from \"./Player2.vue?vue&type=template&id=a326889c&scoped=true&\"\nimport script from \"./Player2.vue?vue&type=script&lang=js&\"\nexport * from \"./Player2.vue?vue&type=script&lang=js&\"\nimport style0 from \"./Player2.vue?vue&type=style&index=0&id=a326889c&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../../../plugin-webrtc/ui/node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"a326889c\",\n  null\n  \n)\n\nexport default component.exports","<template>\r\n    <div>\r\n        <div class=\"tabpanel\" v-if=\"$parent.titleTabActive === 0\">\r\n            <mu-data-table :data=\"Devices\" :columns=\"columns\">\r\n                <template #expand=\"prop\">\r\n                    <mu-data-table\r\n                        :data=\"prop.row.Channels\"\r\n                        :columns=\"columns2\"\r\n                    >\r\n                        <template #default=\"{ row: item, $index }\">\r\n                            <td>{{ item.DeviceID }}</td>\r\n                            <td>{{ item.Name }}</td>\r\n                            <td>{{ item.Manufacturer }}</td>\r\n                            <td>{{ item.Address }}</td>\r\n                            <td>{{ item.Status }}</td>\r\n                            <td>\r\n                                <mu-button\r\n                                    flat\r\n                                    v-if=\"item.Connected\"\r\n                                    @click=\"ptz(prop.row.ID, $index, item)\"\r\n                                    >云台\r\n                                </mu-button>\r\n                                <mu-button\r\n                                    flat\r\n                                    v-if=\"item.Connected\"\r\n                                    @click=\"bye(prop.row.ID, $index)\"\r\n                                    >断开</mu-button\r\n                                >\r\n                                <mu-button\r\n                                    v-else\r\n                                    flat\r\n                                    @click=\"invite(prop.row.ID, $index, item)\"\r\n                                    >连接\r\n                                </mu-button>\r\n                            </td>\r\n                        </template>\r\n                    </mu-data-table>\r\n                </template>\r\n                <template #default=\"{ row: item }\">\r\n                    <td>{{ item.ID }}</td>\r\n                    <td>{{ item.Addr }}</td>\r\n                    <td>{{ item.Channels ? item.Channels.length : 0 }}</td>\r\n                    <td>\r\n                        <StartTime :value=\"item.RegisterTime\"></StartTime>\r\n                    </td>\r\n                    <td>\r\n                        <StartTime :value=\"item.UpdateTime\"></StartTime>\r\n                    </td>\r\n                    <td>{{ item.Status }}</td>\r\n                </template>\r\n            </mu-data-table>\r\n        </div>\r\n        <div class=\"tabpanel\" v-if=\"$parent.titleTabActive === 1\">\r\n            <div class=\"search\">\r\n                <i-select v-model=\"channelSelectedList\" multiple>\r\n                    <Option\r\n                        v-for=\"(channel, index) in channelList\"\r\n                        :value=\"channel\"\r\n                        :label=\"channel.DeviceID + '(' + channel.Name + ')'\"\r\n                        :key=\"index\"\r\n                    >\r\n                    </Option>\r\n                </i-select>\r\n            </div>\r\n            <div class=\"flex-box\">\r\n                <template v-for=\"(channel, index) in channelSelectedList\">\r\n                    <div class=\"flex-item\" :key=\"index\" v-if=\"channel.ID\">\r\n                        <webrtc-player2\r\n                            :stream-path=\"'gb28181/' + channel.ID\"\r\n                        ></webrtc-player2>\r\n                    </div>\r\n                </template>\r\n            </div>\r\n        </div>\r\n        <webrtc-player\r\n            ref=\"player\"\r\n            @ptz=\"sendPtz\"\r\n            v-model=\"previewStreamPath\"\r\n            :PublicIP=\"PublicIP\"\r\n        ></webrtc-player>\r\n    </div>\r\n</template>\r\n<script>\r\nimport WebrtcPlayer from \"./components/Player\";\r\nimport WebrtcPlayer2 from \"./components/Player2\";\r\nimport { getPTZCmd, PTZ_TYPE } from \"./utils/ptz-cmd\";\r\n\r\nexport default {\r\n    components: {\r\n        WebrtcPlayer,\r\n        WebrtcPlayer2,\r\n    },\r\n    props: {\r\n        ListenAddr: String,\r\n    },\r\n    computed: {\r\n        PublicIP() {\r\n            return this.ListenAddr.split(\":\")[0];\r\n        },\r\n    },\r\n    data() {\r\n        return {\r\n            Devices: [],\r\n            previewStreamPath: false,\r\n            channelList: [],\r\n            channelSelectedList: [],\r\n            context: {\r\n                id: null,\r\n                channel: 0,\r\n                item: null,\r\n            },\r\n            columns: Object.freeze(\r\n                [\r\n                    \"设备号\",\r\n                    \"地址\",\r\n                    \"通道数\",\r\n                    \"注册时间\",\r\n                    \"更新时间\",\r\n                    \"状态\",\r\n                ].map((title) => ({\r\n                    title,\r\n                }))\r\n            ),\r\n            columns2: Object.freeze([\r\n                \"通道编号\",\r\n                \"名称\",\r\n                \"厂商\",\r\n                \"地址\",\r\n                \"状态\",\r\n                \"操作\",\r\n            ]).map((title) => ({ title })),\r\n        };\r\n    },\r\n    created() {\r\n        this.fetchlist();\r\n    },\r\n    mounted() {\r\n        this.$parent.titleTabs = [\"列表\", \"N路播放\"];\r\n    },\r\n    methods: {\r\n        fetchlist() {\r\n            const listES = new EventSource(this.apiHost + \"/gb28181/list\");\r\n            listES.onmessage = (evt) => {\r\n                if (!evt.data) return;\r\n                this.Devices = JSON.parse(evt.data) || [];\r\n                this.Devices.sort((a, b) => (a.ID > b.ID ? 1 : -1));\r\n                let channelList = [];\r\n                this.Devices.forEach((device) => {\r\n                    const channels = device.Channels || [];\r\n                    if (channels.length > 0) {\r\n                        channelList = channelList.concat(channels);\r\n                    }\r\n                });\r\n                if (channelList.length > 0) {\r\n                    this.channelList = channelList;\r\n                }\r\n            };\r\n            this.$once(\"hook:destroyed\", () => listES.close());\r\n        },\r\n        ptz(id, channel, item) {\r\n            this.context = {\r\n                id,\r\n                channel,\r\n                item,\r\n            };\r\n            this.previewStreamPath = true;\r\n            this.$nextTick(() =>\r\n                this.$refs.player.play(\"gb28181/\" + item.DeviceID)\r\n            );\r\n        },\r\n        sendPtz(options) {\r\n            const ptzCmd = getPTZCmd(options);\r\n            const ptzCmdStop = getPTZCmd({ type: PTZ_TYPE.stop });\r\n            this.ajax\r\n                .get(\"/gb28181/control\", {\r\n                    id: this.context.id,\r\n                    channel: this.context.channel,\r\n                    ptzcmd: ptzCmd,\r\n                })\r\n                .then((x) => {\r\n                    if (\r\n                        options.type === PTZ_TYPE.stop ||\r\n                        options.cycle === true\r\n                    ) {\r\n                        return;\r\n                    }\r\n                    setTimeout(() => {\r\n                        this.ajax.get(\"/gb28181/control\", {\r\n                            id: this.context.id,\r\n                            channel: this.context.channel,\r\n                            ptzcmd: ptzCmdStop,\r\n                        });\r\n                    }, 500);\r\n                });\r\n        },\r\n        invite(id, channel, item) {\r\n            this.ajax.get(\"/gb28181/invite\", { id, channel }).then((x) => {\r\n                item.Connected = true;\r\n            });\r\n        },\r\n        bye(id, channel, item) {\r\n            this.ajax.get(\"/gb28181/bye\", { id, channel }).then((x) => {\r\n                item.Connected = false;\r\n            });\r\n        },\r\n    },\r\n};\r\n</script>\r\n<style scoped>\r\n.flex-box {\r\n    display: flex;\r\n    flex-flow: row wrap;\r\n    align-content: flex-start;\r\n}\r\n\r\n.flex-item {\r\n    flex: 0 0 33.3333%;\r\n    height: 275px;\r\n    padding: 10px;\r\n}\r\n</style>\r\n","import mod from \"-!../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=script&lang=js&\"; export default mod; export * from \"-!../../../plugin-webrtc/ui/node_modules/cache-loader/dist/cjs.js??ref--0-0!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/index.js??vue-loader-options!./App.vue?vue&type=script&lang=js&\"","import { render, staticRenderFns } from \"./App.vue?vue&type=template&id=7bad0327&scoped=true&\"\nimport script from \"./App.vue?vue&type=script&lang=js&\"\nexport * from \"./App.vue?vue&type=script&lang=js&\"\nimport style0 from \"./App.vue?vue&type=style&index=0&id=7bad0327&scoped=true&lang=css&\"\n\n\n/* normalize component */\nimport normalizer from \"!../../../plugin-webrtc/ui/node_modules/vue-loader/lib/runtime/componentNormalizer.js\"\nvar component = normalizer(\n  script,\n  render,\n  staticRenderFns,\n  false,\n  null,\n  \"7bad0327\",\n  null\n  \n)\n\nexport default component.exports","import './setPublicPath'\nimport mod from '~entry'\nexport default mod\nexport * from '~entry'\n","// addapted from the document.currentScript polyfill by Adam Miller\n// MIT license\n// source: https://github.com/amiller-gh/currentScript-polyfill\n\n// added support for Firefox https://bugzilla.mozilla.org/show_bug.cgi?id=1620505\n\n(function (root, factory) {\n  if (typeof define === 'function' && define.amd) {\n    define([], factory);\n  } else if (typeof module === 'object' && module.exports) {\n    module.exports = factory();\n  } else {\n    root.getCurrentScript = factory();\n  }\n}(typeof self !== 'undefined' ? self : this, function () {\n  function getCurrentScript () {\n    if (document.currentScript) {\n      return document.currentScript\n    }\n  \n    // IE 8-10 support script readyState\n    // IE 11+ & Firefox support stack trace\n    try {\n      throw new Error();\n    }\n    catch (err) {\n      // Find the second match for the \"at\" string to get file src url from stack.\n      var ieStackRegExp = /.*at [^(]*\\((.*):(.+):(.+)\\)$/ig,\n        ffStackRegExp = /@([^@]*):(\\d+):(\\d+)\\s*$/ig,\n        stackDetails = ieStackRegExp.exec(err.stack) || ffStackRegExp.exec(err.stack),\n        scriptLocation = (stackDetails && stackDetails[1]) || false,\n        line = (stackDetails && stackDetails[2]) || false,\n        currentLocation = document.location.href.replace(document.location.hash, ''),\n        pageSource,\n        inlineScriptSourceRegExp,\n        inlineScriptSource,\n        scripts = document.getElementsByTagName('script'); // Live NodeList collection\n  \n      if (scriptLocation === currentLocation) {\n        pageSource = document.documentElement.outerHTML;\n        inlineScriptSourceRegExp = new RegExp('(?:[^\\\\n]+?\\\\n){0,' + (line - 2) + '}[^<]*<script>([\\\\d\\\\D]*?)<\\\\/script>[\\\\d\\\\D]*', 'i');\n        inlineScriptSource = pageSource.replace(inlineScriptSourceRegExp, '$1').trim();\n      }\n  \n      for (var i = 0; i < scripts.length; i++) {\n        // If ready state is interactive, return the script tag\n        if (scripts[i].readyState === 'interactive') {\n          return scripts[i];\n        }\n  \n        // If src matches, return the script tag\n        if (scripts[i].src === scriptLocation) {\n          return scripts[i];\n        }\n  \n        // If inline source matches, return the script tag\n        if (\n          scriptLocation === currentLocation &&\n          scripts[i].innerHTML &&\n          scripts[i].innerHTML.trim() === inlineScriptSource\n        ) {\n          return scripts[i];\n        }\n      }\n  \n      // If no match, return null\n      return null;\n    }\n  };\n\n  return getCurrentScript\n}));\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/ui/src/App.vue b/ui/src/App.vue
index 8b0818d..cc3ba97 100644
--- a/ui/src/App.vue
+++ b/ui/src/App.vue
@@ -3,7 +3,10 @@
         <div class="tabpanel" v-if="$parent.titleTabActive === 0">
             <mu-data-table :data="Devices" :columns="columns">
                 <template #expand="prop">
-                    <mu-data-table :data="prop.row.Channels" :columns="columns2">
+                    <mu-data-table
+                        :data="prop.row.Channels"
+                        :columns="columns2"
+                    >
                         <template #default="{ row: item, $index }">
                             <td>{{ item.DeviceID }}</td>
                             <td>{{ item.Name }}</td>
@@ -11,19 +14,31 @@
                             <td>{{ item.Address }}</td>
                             <td>{{ item.Status }}</td>
                             <td>
-                                <mu-button flat v-if="item.Connected" @click="ptz(prop.row.ID, $index,item)">云台
+                                <mu-button
+                                    flat
+                                    v-if="item.Connected"
+                                    @click="ptz(prop.row.ID, $index, item)"
+                                    >云台
                                 </mu-button>
-                                <mu-button flat v-if="item.Connected" @click="bye(prop.row.ID, $index)">断开</mu-button>
-                                <mu-button v-else flat @click="invite(prop.row.ID, $index,item)"
-                                >连接
-                                </mu-button
+                                <mu-button
+                                    flat
+                                    v-if="item.Connected"
+                                    @click="bye(prop.row.ID, $index)"
+                                    >断开</mu-button
                                 >
+                                <mu-button
+                                    v-else
+                                    flat
+                                    @click="invite(prop.row.ID, $index, item)"
+                                    >连接
+                                </mu-button>
                             </td>
                         </template>
                     </mu-data-table>
                 </template>
                 <template #default="{ row: item }">
                     <td>{{ item.ID }}</td>
+                    <td>{{ item.Addr }}</td>
                     <td>{{ item.Channels ? item.Channels.length : 0 }}</td>
                     <td>
                         <StartTime :value="item.RegisterTime"></StartTime>
@@ -37,112 +52,136 @@
         </div>
         <div class="tabpanel" v-if="$parent.titleTabActive === 1">
             <div class="search">
-            <i-select v-model="channelSelectedList" multiple>
-              <Option v-for="(channel,index) in channelList"
-                      :value="channel"
-                      :label="channel.DeviceID + '(' + channel.Name + ')'"
-                      :key="index">
-              </Option>
-            </i-select>
+                <i-select v-model="channelSelectedList" multiple>
+                    <Option
+                        v-for="(channel, index) in channelList"
+                        :value="channel"
+                        :label="channel.DeviceID + '(' + channel.Name + ')'"
+                        :key="index"
+                    >
+                    </Option>
+                </i-select>
             </div>
             <div class="flex-box">
-                <template v-for="(channel,index) in channelSelectedList">
+                <template v-for="(channel, index) in channelSelectedList">
                     <div class="flex-item" :key="index" v-if="channel.ID">
-                        <webrtc-player2 :stream-path="'gb28181/'+channel.ID"></webrtc-player2>
+                        <webrtc-player2
+                            :stream-path="'gb28181/' + channel.ID"
+                        ></webrtc-player2>
                     </div>
                 </template>
             </div>
         </div>
-        <webrtc-player ref="player" @ptz="sendPtz" v-model="previewStreamPath" :PublicIP="PublicIP"></webrtc-player>
+        <webrtc-player
+            ref="player"
+            @ptz="sendPtz"
+            v-model="previewStreamPath"
+            :PublicIP="PublicIP"
+        ></webrtc-player>
     </div>
 </template>
 <script>
-    import WebrtcPlayer from "./components/Player"
-    import WebrtcPlayer2 from "./components/Player2";
-    import {getPTZCmd, PTZ_TYPE} from "./utils/ptz-cmd";
+import WebrtcPlayer from "./components/Player";
+import WebrtcPlayer2 from "./components/Player2";
+import { getPTZCmd, PTZ_TYPE } from "./utils/ptz-cmd";
 
-    export default {
-        components: {
-            WebrtcPlayer,
-            WebrtcPlayer2
-        },
-        props: {
-            ListenAddr: String
-        },
-        computed: {
-            PublicIP() {
-                return this.ListenAddr.split(":")[0]
-            }
+export default {
+    components: {
+        WebrtcPlayer,
+        WebrtcPlayer2,
+    },
+    props: {
+        ListenAddr: String,
+    },
+    computed: {
+        PublicIP() {
+            return this.ListenAddr.split(":")[0];
         },
-        data() {
-            return {
-                Devices: [], previewStreamPath: false,
-                channelList: [],
-                channelSelectedList:[],
-                context: {
-                    id: null,
-                    channel: 0,
-                    item: null
-                },
-                columns: Object.freeze(
-                    ["设备号", "通道数", "注册时间", "更新时间", "状态"].map(
-                        (title) => ({
-                            title,
-                        })
-                    )
-                ),
-                columns2: Object.freeze([
-                    "通道编号",
-                    "名称",
-                    "厂商",
+    },
+    data() {
+        return {
+            Devices: [],
+            previewStreamPath: false,
+            channelList: [],
+            channelSelectedList: [],
+            context: {
+                id: null,
+                channel: 0,
+                item: null,
+            },
+            columns: Object.freeze(
+                [
+                    "设备号",
                     "地址",
+                    "通道数",
+                    "注册时间",
+                    "更新时间",
                     "状态",
-                    "操作",
-                ]).map((title) => ({title})),
+                ].map((title) => ({
+                    title,
+                }))
+            ),
+            columns2: Object.freeze([
+                "通道编号",
+                "名称",
+                "厂商",
+                "地址",
+                "状态",
+                "操作",
+            ]).map((title) => ({ title })),
+        };
+    },
+    created() {
+        this.fetchlist();
+    },
+    mounted() {
+        this.$parent.titleTabs = ["列表", "N路播放"];
+    },
+    methods: {
+        fetchlist() {
+            const listES = new EventSource(this.apiHost + "/gb28181/list");
+            listES.onmessage = (evt) => {
+                if (!evt.data) return;
+                this.Devices = JSON.parse(evt.data) || [];
+                this.Devices.sort((a, b) => (a.ID > b.ID ? 1 : -1));
+                let channelList = [];
+                this.Devices.forEach((device) => {
+                    const channels = device.Channels || [];
+                    if (channels.length > 0) {
+                        channelList = channelList.concat(channels);
+                    }
+                });
+                if (channelList.length > 0) {
+                    this.channelList = channelList;
+                }
             };
+            this.$once("hook:destroyed", () => listES.close());
         },
-        created() {
-            this.fetchlist();
-        },
-        mounted() {
-            this.$parent.titleTabs = ["列表", "N路播放"];
+        ptz(id, channel, item) {
+            this.context = {
+                id,
+                channel,
+                item,
+            };
+            this.previewStreamPath = true;
+            this.$nextTick(() =>
+                this.$refs.player.play("gb28181/" + item.DeviceID)
+            );
         },
-        methods: {
-            fetchlist() {
-                const listES = new EventSource(this.apiHost + "/gb28181/list");
-                listES.onmessage = (evt) => {
-                    if (!evt.data) return;
-                    this.Devices = JSON.parse(evt.data) || [];
-                    this.Devices.sort((a, b) => (a.ID > b.ID ? 1 : -1));
-                    let channelList =[]
-                    this.Devices.forEach((device)=>{
-                      const channels = device.Channels || [];
-                      if(channels.length > 0){
-                          channelList = channelList.concat(channels);
-                      }
-                    });
-                    if(channelList.length > 0){
-                        this.channelList = channelList;
-                    }
-                };
-                this.$once("hook:destroyed", () => listES.close());
-            },
-            ptz(id, channel, item) {
-                this.context = {
-                    id, channel, item
-                };
-                this.previewStreamPath = true
-                this.$nextTick(() => this.$refs.player.play("gb28181/" + item.DeviceID));
-            },
-            sendPtz(options) {
-                const ptzCmd = getPTZCmd(options);
-                const ptzCmdStop = getPTZCmd({type: PTZ_TYPE.stop});
-                this.ajax.get("/gb28181/control", {
+        sendPtz(options) {
+            const ptzCmd = getPTZCmd(options);
+            const ptzCmdStop = getPTZCmd({ type: PTZ_TYPE.stop });
+            this.ajax
+                .get("/gb28181/control", {
                     id: this.context.id,
                     channel: this.context.channel,
                     ptzcmd: ptzCmd,
-                }).then(x => {
-                    if (options.type === PTZ_TYPE.stop || options.cycle === true) {
+                })
+                .then((x) => {
+                    if (
+                        options.type === PTZ_TYPE.stop ||
+                        options.cycle === true
+                    ) {
                         return;
                     }
                     setTimeout(() => {
@@ -151,32 +190,32 @@
                             channel: this.context.channel,
                             ptzcmd: ptzCmdStop,
                         });
-                    }, 500)
-                });
-            },
-            invite(id, channel, item) {
-                this.ajax.get("/gb28181/invite", {id, channel}).then(x => {
-                    item.Connected = true
+                    }, 500);
                 });
-            },
-            bye(id, channel, item) {
-                this.ajax.get("/gb28181/bye", {id, channel}).then(x => {
-                    item.Connected = false
-                });
-            }
         },
-    };
+        invite(id, channel, item) {
+            this.ajax.get("/gb28181/invite", { id, channel }).then((x) => {
+                item.Connected = true;
+            });
+        },
+        bye(id, channel, item) {
+            this.ajax.get("/gb28181/bye", { id, channel }).then((x) => {
+                item.Connected = false;
+            });
+        },
+    },
+};
 </script>
 <style scoped>
-    .flex-box {
-        display: flex;
-        flex-flow: row wrap;
-        align-content: flex-start;
-    }
+.flex-box {
+    display: flex;
+    flex-flow: row wrap;
+    align-content: flex-start;
+}
 
-    .flex-item {
-        flex: 0 0 33.3333%;
-        height: 275px;
-        padding: 10px;
-    }
+.flex-item {
+    flex: 0 0 33.3333%;
+    height: 275px;
+    padding: 10px;
+}
 </style>