test_WaitingOnMissingData.html

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<meta http-equiv="content-type" content="text/html; charset=windows-1252">

  <title>MSE: |waiting| event when source data is missing</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, el) => {

  await once(ms, "sourceopen");

  ok(true, "Receive a sourceopen event");

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

  sb.addEventListener("error", e => {

    ok(false, "Got Error: " + e);

    SimpleTest.finish();

});

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

  await loadSegment(sb, new Uint8Array(arrayBuffer, 0, 318));

  await loadSegment(sb, new Uint8Array(arrayBuffer, 318, 25223 - 318));

  await loadSegment(sb, new Uint8Array(arrayBuffer, 25223, 46712 - 25223));

  /* Note - Missing |46712, 67833 - 46712| segment here */

  await loadSegment(sb, new Uint8Array(arrayBuffer, 67833, 88966 - 67833));

  await loadSegment(sb, new Uint8Array(arrayBuffer, 88966));

  // HTMLMediaElement fires "waiting" if somebody invokes |play()| before the MDSM

  // has notified it of available data. Make sure that we get "playing" before

  // we starting waiting for "waiting".

  info("Invoking play()");

  let p = once(el, "playing");

  el.play();

  await p;

  ok(true, "Video playing. It should play for a bit, then fire 'waiting'");

  p = once(el, "waiting");

  el.play();

  await p;

  // currentTime is based on the current video frame, so if the audio ends just before

  // the next video frame, currentTime can be up to 1 frame's worth earlier than

  // min(audioEnd, videoEnd).

  // 0.0465 is the length of the last audio frame.

  ok(el.currentTime >= (sb.buffered.end(0) - 0.0465),

     `Got a waiting event at ${el.currentTime}`);

  info("Loading more data");

  p = once(el, "ended");

  await loadSegment(sb, new Uint8Array(arrayBuffer, 46712, 67833 - 46712));

  ms.endOfStream();

  await p;

  // These fuzz factors are bigger than they should be. We should investigate

  // and fix them in bug 1137574.

  isfuzzy(el.duration, 4.001, 0.1, "Video has correct duration: " + el.duration);

  isfuzzy(el.currentTime, el.duration, 0.1, "Video has correct currentTime.");

  SimpleTest.finish();

});

</script>

</pre>

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</html>