test_FrameSelection.html

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<head>

  <title>MSE: verify correct frames selected for given position</title>

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

  <script type="text/javascript" src="mediasource.js"></script>

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

</head>

<body>

<pre id="test">

<script class="testbody" type="text/javascript">

SimpleTest.waitForExplicitFinish();

runWithMSE(async (ms, v) => {

  await once(ms, "sourceopen");

  const sb = ms.addSourceBuffer("video/webm");

  let arrayBuffer = await fetchWithXHR("seek.webm");

  let p = once(v, "loadedmetadata");

  // Append entire file covering range [0, 4].

  sb.appendBuffer(new Uint8Array(arrayBuffer));

  await p;

  is(v.currentTime, 0, "currentTime has correct initial value");

  is(v.videoWidth, 320, "videoWidth has correct initial value");

  is(v.videoHeight, 240, "videoHeight has correct initial value");

  arrayBuffer = await fetchWithXHR("seek_lowres.webm");

  // Append initialization segment.

  info("Appending low-res init segment");

  p = once(sb, "updateend");

  sb.appendBuffer(new Uint8Array(arrayBuffer, 0, 438));

  await p;

  info("Appending low-res range [2,4]");

  // Append media segment covering range [2, 4].

  p = once(sb, "updateend");

  sb.appendBuffer(new Uint8Array(arrayBuffer, 51003));

  await p;

  ms.endOfStream();

  info("Seeking to t=3");

  p = Promise.all([once(v, "seeked"), once(v, "resize")]);

  v.currentTime = 3;

  await p;

  is(v.currentTime, 3, "Video currentTime at target");

  is(v.videoWidth, 160, "videoWidth has correct low-res value");

  is(v.videoHeight, 120, "videoHeight has correct low-res value");

  info("Seeking to t=1");

  p = Promise.all([once(v, "seeked"), once(v, "resize")]);

  v.currentTime = 1;

  await p;

  is(v.currentTime, 1, "Video currentTime at target");

  is(v.videoWidth, 320, "videoWidth has correct high-res value");

  is(v.videoHeight, 240, "videoHeight has correct high-res value");

  SimpleTest.finish();

});

</script>

</pre>

</body>

</html>