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test_TimestampOffset_mp4.html
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test_TimestampOffset_mp4.html
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<!DOCTYPE HTML>
<html>
<head>
<title>MSE: basic functionality</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) => {
const eps = 0.01;
await once(ms, "sourceopen");
ok(true, "Receive a sourceopen event");
const audiosb = ms.addSourceBuffer("audio/mp4");
const videosb = ms.addSourceBuffer("video/mp4");
// We divide the video into 3 chunks:
// chunk 0: segments 1-4
// chunk 1: segments 5-8
// chunk 2: segments 9-13
// We then fill the timeline so that it seamlessly plays the chunks in order 0, 2, 1.
const vchunks = [{start: 0, end: 3.2033},
{ start: 3.2033, end: 6.4066},
{ start: 6.4066, end: 10.01}];
const firstvoffset = vchunks[2].end - vchunks[2].start; // Duration of chunk 2
const secondvoffset = -(vchunks[1].end - vchunks[1].start); // -(Duration of chunk 1)
await fetchAndLoad(videosb, "bipbop/bipbop_video", ["init"], ".mp4");
await fetchAndLoad(videosb, "bipbop/bipbop_video", range(1, 5), ".m4s");
is(videosb.buffered.length, 1, "No discontinuity");
isfuzzy(videosb.buffered.start(0), vchunks[0].start, eps, "Chunk start");
isfuzzy(videosb.buffered.end(0), vchunks[0].end, eps, "Chunk end");
videosb.timestampOffset = firstvoffset;
await fetchAndLoad(videosb, "bipbop/bipbop_video", range(5, 9), ".m4s");
is(videosb.buffered.length, 2, "One discontinuity");
isfuzzy(videosb.buffered.start(0), vchunks[0].start, eps, "First Chunk start");
isfuzzy(videosb.buffered.end(0), vchunks[0].end, eps, "First chunk end");
isfuzzy(videosb.buffered.start(1), vchunks[1].start + firstvoffset, eps, "Second chunk start");
isfuzzy(videosb.buffered.end(1), vchunks[1].end + firstvoffset, eps, "Second chunk end");
videosb.timestampOffset = secondvoffset;
await fetchAndLoad(videosb, "bipbop/bipbop_video", range(9, 14), ".m4s");
is(videosb.buffered.length, 1, "No discontinuity (end)");
isfuzzy(videosb.buffered.start(0), vchunks[0].start, eps, "Chunk start");
isfuzzy(videosb.buffered.end(0), vchunks[2].end, eps, "Chunk end");
audiosb.timestampOffset = 3;
await fetchAndLoad(audiosb, "bipbop/bipbop_audio", ["init"], ".mp4");
await fetchAndLoad(audiosb, "bipbop/bipbop_audio", range(1, 12), ".m4s");
is(audiosb.buffered.length, 1, "No audio discontinuity");
isfuzzy(audiosb.buffered.start(0), 3, eps, "Audio starts at 3");
// Trim the rest of the audio.
audiosb.remove(videosb.buffered.end(0), Infinity);
videosb.remove(videosb.buffered.end(0), Infinity);
if (audiosb.updating) {
await once(audiosb, "updateend");
}
if (videosb.updating) {
await once(videosb, "updateend");
}
info("waiting for play to complete");
el.play();
el.currentTime = el.buffered.start(0);
ms.endOfStream();
await Promise.all([once(el, "ended"), once(el, "seeked")]);
SimpleTest.finish();
});
</script>
</pre>
</body>
</html>