steg-experiments/webgpu/index.html at main · ianling/steg-experiments · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
<!DOCTYPE html>
<head>
    <title>steg webgpu test</title>
    <style>
        video {
            max-width: 320px;
            border: 1px solid #000000;
        }

        canvas {
            max-width: 320px;
            border: 1px solid #000000;
        }
    </style>
</head>
<body>
<div>
    <div>
        <input id="file" type="file" name="file">
    </div>

    <div>
        <button id="save">Save</button>
    </div>
    <div>
        <textarea disabled id="hex" rows="30" cols="48">
            raw hex
        </textarea>
        <textarea disabled id="ascii" rows="30" cols="48">
            ascii
        </textarea>
    </div>

    <div id="stats"></div>
</div>

<div></div>
<div></div>

<div>
    <script type="module">
        import {decodeVideo} from "./index.js";
        import {saveDataToFileFirefox} from "./index.js";

        function processDecodedResults(result) {
            document.querySelector("#save").addEventListener('click', saveWrapper(result));

            const hexElem = document.getElementById("hex");
            const asciiElem = document.getElementById("ascii");
            let hex = ""
            let ascii = "";
            result.forEach((byte) => {
                hex += byte.toString(16).padStart(2, "0") + " ";
                ascii += String.fromCharCode(byte);
            })

            hexElem.value = hex;
            asciiElem.value = ascii;
        }

        async function handleFileChange(event) {
            if(event.target.files.length === 0) return;

            const startTime = Date.now();
            const blob = event.target.files[0];
            let results = await decodeVideo(blob);
            const decodeEndTime = Date.now();
            processDecodedResults(results);
            const statsElem = document.getElementById("stats");
            statsElem.textContent = `Decode time: ${decodeEndTime - startTime}ms`;
        }

        document.querySelector("#file").addEventListener('change', handleFileChange);

        function saveWrapper(decodedFrames) {
            return () => saveDataToFileFirefox(decodedFrames)
        }
    </script>
</div>
</body>