fix: Correctly encode volume stream from mpv

The stream returns values from 0 to 100, but in the app we work with values from 0 to 1. In the volume stream, we map each result and divide it by 100, just like it is done in the volume getter.

Author: bdlukaa

lib/models/device.dart

@@ -120,9 +120,20 @@ class Device {
   ///
   /// This volume is restored every time the app opens and is applied to the
   /// respective video player.
-  double volume = defaultVolume;
+  double _volume = defaultVolume;
   static double get defaultVolume =>
       SettingsProvider.instance.kInitialDevicesVolume.value;
+  double get volume => _volume;
+  set volume(double value) {
+    if (value < 0.0 || value > 1.0) {
+      throw ArgumentError.value(
+        value,
+        'volume',
+        'Volume must be between 0.0 and 1.0',
+      );
+    }
+    _volume = value.clamp(0.0, 1.0);
+  }
 
   /// Creates a device.
   Device({

lib/screens/layouts/desktop/stream_data.dart

@@ -212,7 +212,7 @@ class _StreamDataState extends State<StreamData> {
                 ),
                 Text(
                   loc.volume(
-                    (widget.video.player.volume * 100).toInt().toString(),
+                    '${(widget.video.player.volume * 100).toInt()}',
                   ),
                   style: theme.textTheme.headlineSmall,
                 ),

lib/utils/extensions.dart

@@ -159,6 +159,20 @@ extension FileExtension on File {
 }
 
 extension IterableTExtension<T> on Iterable<T> {
+  /// Find the most duplicated element in the list.
+  ///
+  /// If there are multiple elements with the same count, the first one will be
+  /// returned. If the list is empty, null will be returned.
+  ///
+  /// Example:
+  /// ```dart
+  /// final list = [1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5];
+  /// final mostDuplicated = list.findMaxDuplicatedElementInList();
+  /// print(mostDuplicated); // 1
+  /// ```
+  ///
+  /// This is useful when you have a list of elements and you want to know which
+  /// element appears the most.
   T findMaxDuplicatedElementInList() => fold<Map<T, int>>(
           {},
           (map, element) =>

packages/unity_video_player/unity_video_player_main/lib/unity_video_player_main.dart

@@ -349,7 +349,9 @@ class UnityVideoPlayerMediaKit extends UnityVideoPlayer {
   double get volume => mkPlayer.state.volume / 100;
 
   @override
-  Stream<double> get volumeStream => mkPlayer.stream.volume;
+  Stream<double> get volumeStream => mkPlayer.stream.volume.map((volume) {
+        return volume / 100;
+      });
 
   @override
   Future<void> setSpeed(double speed) => mkPlayer.setRate(speed);