mozilla-release/dom/media/mediasource/test/test_BufferingWait_mp4.html

<!DOCTYPE html>
<html><head>
<meta http-equiv="content-type" content="text/html; charset=windows-1252">
  <title>MSE: Don't get stuck buffering for too long when we have frames to show</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");
  ok(true, "Receive a sourceopen event");
  ms.addEventListener("sourceopen", () => ok(false, "No more sourceopen"));
  const sb = ms.addSourceBuffer("video/mp4");
  ok(sb, "Create a SourceBuffer");

  sb.addEventListener("error", e => {
    ok(false, "Got Error: " + e);
    SimpleTest.finish();
  });
  await fetchAndLoad(sb, "bipbop/bipbop", ["init"], ".mp4");
  await fetchAndLoad(sb, "bipbop/bipbop", ["1"], ".m4s");
  await fetchAndLoad(sb, "bipbop/bipbop", ["2"], ".m4s");
  /* Note - Missing |bipbop3| segment here corresponding to (1.62, 2.41] */
  /* Note - Missing |bipbop4| segment here corresponding to (2.41, 3.20]  */
  await fetchAndLoad(sb, "bipbop/bipbop", ["5"], ".m4s");
  // last audio sample has a start time of 1.578956s
  info("Playing video. It should play for a bit, then fire 'waiting'");
  v.play();
  await waitUntilTime(v, 1.57895);
  const firstStop = Date.now();
  await fetchAndLoad(sb, "bipbop/bipbop", ["3"], ".m4s");
  // last audio sample has a start time of 2.368435
  await waitUntilTime(v, 2.36843);
  const waitDuration = (Date.now() - firstStop) / 1000;
  ok(waitDuration < 15, `Should not spend inordinate amount of time buffering: ${waitDuration}`);
  await fetchAndLoad(sb, "bipbop/bipbop", ["4"], ".m4s");
  ms.endOfStream();
  await once(v, "ended");
  SimpleTest.finish();
});
</script>
</pre>
</body>
</html>