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<!DOCTYPE HTML>
<html>
<head>
<title>MSE: input buffer is cleared as expected (bug 1697476)</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();
// Test bug 1697476 is fixed. We do this by appending a number of segments with
// trailing `skip` boxes. If the bug is fixed, then the data from these appends
// will eventually be cleared from memory. If not fixed, we leak that memory.
runWithMSE(async (ms, v) => {
await once(ms, "sourceopen");
const sb = ms.addSourceBuffer("video/mp4");
await fetchAndLoad(sb, "bipbop/bipbop_video", ["init"], ".mp4");
// Load ~1mb of media.
await fetchAndLoad(sb, "bipbop/bipbop_trailing_skip_box_video", ["1"], ".m4s");
// Load ~1mb more media several more times.
const numberOfAppends = 5;
for (let i = 1; i < numberOfAppends; ++i) {
sb.timestampOffset = v.buffered.end(0);
await fetchAndLoad(sb, "bipbop/bipbop_trailing_skip_box_video", ["1"], ".m4s");
}
// Grab a memory report. We'll use this to make sure we're not accumulating
// too much data in our buffers.
const mgr = SpecialPowers.Cc["@mozilla.org/memory-reporter-manager;1"]
.getService(SpecialPowers.Ci.nsIMemoryReporterManager);
let amount = 0;
const handleReport = (aProcess, aPath, aKind, aUnits, aAmount) => {
if (aPath == "explicit/media/resources") {
amount += aAmount;
}
};
await new Promise(r => mgr.getReports(handleReport, null, r, null, /* anonymized = */ false));
ok(true, "Yay didn't crash!");
ok(amount !== undefined, "Got media resources amount");
const sgementSize = 1023860;
// Set the limit to be equal to the total data we appended. If we're not
// clearing buffers, we'll have all the data from the appends + some other
// data, so will fail.
const limit = sgementSize * numberOfAppends - 1;
ok(amount < limit, `Should have less than ${limit} bytes of media usage. Got ${amount} bytes.`);
SimpleTest.finish();
});
</script>
</pre>
</body>
</html>
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