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<!DOCTYPE HTML>
<html>
<head>
<title>MSE: video resolution changes during playback should not cause video freeze (Bug 1718709)</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">
SimpleTest.waitForExplicitFinish();
runWithMSE(async (ms, v) => {
await once(ms, "sourceopen");
const sb = ms.addSourceBuffer('video/mp4');
sb.appendBuffer(new Uint8Array(await fetchWithXHR("bug1718709_low_res.mp4")));
ok(true, "appended low resolution video");
sb.appendBuffer(new Uint8Array(await fetchWithXHR("bug1718709_high_res.mp4")));
ok(true, "appended high resolution video");
info(`start from the position which is near to the place where resolution changes`);
v.currentTime = 13;
ok(await v.play().then(_=>true,_=>false), "video started playing");
// When video resolution changes, it should not cause video freeze so we check
// its painted frame amount regularly to see if we stop updating video frames.
let lastPaintedFramesAmount = v.mozPaintedFrames;
const intervalHandle = setInterval(_=>{
ok(lastPaintedFramesAmount < v.mozPaintedFrames,
`painted frames keeps growing from ${lastPaintedFramesAmount} to ${v.mozPaintedFrames}`);
lastPaintedFramesAmount = v.mozPaintedFrames;
}, 1000);
// As we didn't append full video, so we will receive `waiting` event later
// which indicates that we can stop testing because we've finished playing
// the high resolution part.
await new Promise(r => {
v.onwaiting = _ => {
clearInterval(intervalHandle);
r();
}
});
SimpleTest.finish();
});
</script>
</body>
</html>
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