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Bug 1755822 - Add test to ensure MediaTrackBuffersManager is clearing its input buffer. r=media-playback-reviewers,alwu 

This adds a modified version of the bipbop video 1 segment used in the
MediaSource tests. This modified segment contains a large trailing 'skip' box.
These trailing boxes can interfere with Gecko's ability to clear memory.

A test case is added to test that Fx is correctly clearing memory after the new
segment is appended several times. Prior to the fix in bug 1697476 this test
would fail, but we should now handle this case better.

Differential Revision: https://phabricator.services.mozilla.com/D139265
This commit is contained in:
Bryce Seager van Dyk 2022-02-24 02:04:46 +00:00
Родитель b63d9c3455
Коммит f938c42021
4 изменённых файлов: 62 добавлений и 0 удалений
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Двоичные данные
dom/media/mediasource/test/bipbop/bipbop_trailing_skip_box_video1.m4s Normal file
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Двоичный файл не отображается.

1
dom/media/mediasource/test/bipbop/bipbop_trailing_skip_box_video1.m4s^headers^ Normal file
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@ -0,0 +1 @@
Cache-Control: no-store

3
dom/media/mediasource/test/mochitest.ini
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@ -6,6 +6,8 @@ support-files =
seek_lowres.webm seek_lowres.webm^headers^
bipbop/bipbop_300-3s.webm bipbop/bipbop_300-3s.webm^headers^
bipbop/bipbop2s.mp4 bipbop/bipbop2s.mp4^headers^
bipbop/bipbop_trailing_skip_box_video1.m4s
bipbop/bipbop_trailing_skip_box_video1.m4s^headers^
bipbop/bipbopinit.mp4 bipbop/bipbop_audioinit.mp4 bipbop/bipbop_videoinit.mp4
bipbop/bipbop1.m4s bipbop/bipbop_audio1.m4s bipbop/bipbop_video1.m4s
bipbop/bipbop2.m4s bipbop/bipbop_audio2.m4s bipbop/bipbop_video2.m4s
@ -87,6 +89,7 @@ skip-if = os == 'win' # bug 1487973,
[test_HaveMetadataUnbufferedSeek.html]
[test_HaveMetadataUnbufferedSeek_mp4.html]
[test_HEAAC_extradata.html]
[test_InputBufferIsCleared.html]
[test_LiveSeekable.html]
[test_LoadedDataFired_mp4.html]
[test_LoadedMetadataFired.html]

58
dom/media/mediasource/test/test_InputBufferIsCleared.html Normal file
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@ -0,0 +1,58 @@
<!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>