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<!DOCTYPE HTML>
<html>
<head>
<title>MSE: A way shorter audio track for seamless looping</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>
<script class="testbody" type="text/javascript">
/**
* This test is used to ensure the media can loop at least twice when its audio
* is significantly shorter than its video. We use the different strategy to
* fill the silence between tracks for the first looping and the other loopings
* happening afterward. The purpose of test is to test the latter one, which
* should create a series small chunks of audio data to fill out the gap,
* instead of one big audio data which might not be processed by AudioSink due
* to its large size.
*/
SimpleTest.waitForExplicitFinish();
runWithMSE(async (ms, el) => {
await once(ms, "sourceopen");
ok(true, "Receive a sourceopen event");
const videosb = ms.addSourceBuffer("video/mp4");
const audiosb = ms.addSourceBuffer("audio/mp4");
// Here we create a way shorter audio than video.
info(`create different length source buffers`);
await fetchAndLoad(videosb, "bipbop/bipbop_video", ["init"], ".mp4");
await fetchAndLoad(videosb, "bipbop/bipbop_video", range(1, 3), ".m4s");
audiosb.appendWindowEnd = videosb.buffered.end(0) - 1;
await fetchAndLoad(audiosb, "bipbop/bipbop_audio", ["init"], ".mp4");
await fetchAndLoad(audiosb, "bipbop/bipbop_audio", range(1, 3), ".m4s");
ms.endOfStream();
await Promise.all([once(el, "durationchange"), once(ms, "sourceended")]);
info(`audio=[${audiosb.buffered.start(0)}-${audiosb.buffered.end(0)}], video=[${videosb.buffered.start(0)}-${videosb.buffered.end(0)}]`);
ok(true, `endOfStream completed, buffer=[${el.buffered.start(0)}, ${el.buffered.end(0)}]`);
ok(videosb.buffered.end(0) > audiosb.buffered.end(0), `video should be longer than audio`);
info(`start playing`);
el.loop = true;
el.controls = true;
await el.play();
let seekCounter = 0;
el.addEventListener("seeked", _ => {
ok(true, `seeked ${++seekCounter} times`);
if (seekCounter == 2) {
ok(true, "seeked at least two time!");
SimpleTest.finish(SimpleTest);
}
});
});
</script>
</body>
</html>
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