test_cloneElementVisually_mediastream_multitrack.html

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<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <title>Test cloneElementVisually</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <script type="application/javascript" src="https://example.com:443/tests/dom/media/test/cloneElementVisually_helpers.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">

</head>

<body>

<div id="content">

  <h1>Originals</h1>

  <div id="originalContainer"></div>

  <canvas id="canvas"></canvas>

  <h1>MediaStream</h1>

  <div id="streamTargetContainer"></div>

  <h1>Clone</h1>

</div>

<div id="results">

  <h1>Results</h1>

  <canvas id="left"></canvas>

  <canvas id="right"></canvas>

</div>

<script type="application/javascript">

/* import-globals-from cloneElementVisually_helpers.js */

/**

 * Test that a clone of a video that is playing a MediaStream properly tracks

 * the selected video track.

*/

add_task(async () => {

  await SpecialPowers.pushPrefEnv({

    set: [

      ["media.track.enabled", true],

],

});

  let originalVideo = document.createElement("video");

  originalVideo.id = "original";

  document.getElementById("originalContainer").appendChild(originalVideo);

  let streamTarget = document.createElement("video");

  document.getElementById("streamTargetContainer").appendChild(streamTarget);

  await setup();

  let [track1] = originalVideo.mozCaptureStream().getTracks();

  let playingPromise = waitForEventOnce(originalVideo, "playing");

  await originalVideo.play();

  await playingPromise;

  let canvas = document.getElementById("canvas");

  canvas.width = originalVideo.videoWidth / 2;

  canvas.height = originalVideo.videoHeight / 2;

  let ctx = canvas.getContext("2d");

  let [track2] = canvas.captureStream().getTracks();

  ctx.fillStyle = "green";

  ctx.fillRect(0, 0, canvas.width, canvas.height);

  streamTarget.srcObject = new MediaStream([track1, track2]);

  playingPromise = waitForEventOnce(streamTarget, "playing");

  await streamTarget.play();

  await playingPromise;

  await withNewClone(originalVideo, async clone => {

    SpecialPowers.wrap(streamTarget).cloneElementVisually(clone);

    let selectedTrackIdx = streamTarget.videoTracks.selectedIndex;

    streamTarget.videoTracks[++selectedTrackIdx % 2].selected = true;

    await waitForEventOnce(streamTarget, "resize");

    ok(await assertVideosMatch(streamTarget, clone),

       "Should match MediaStream");

});

  // Capturing a stream from a video "taints" it which prevents testing

  // shutdown decoder behaviour. To avoid interfering with future tests,

  // we replace the video.

  let newVideo = originalVideo.cloneNode();

  originalVideo.parentNode.replaceChild(newVideo, originalVideo);

});

</script>

</body>

</html>