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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>