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Tip revision: 4e5f09f89e6f1976dd49a57ba46cd447c7e19a1e authored by Alex Moshchuk on 13 April 2018, 15:22:14 UTC
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Tip revision: 4e5f09f
mediasource-sequencemode-append-buffer.html
<!DOCTYPE html>
<!-- Copyright © 2016 Chromium authors and World Wide Web Consortium, (Massachusetts Institute of Technology, ERCIM, Keio University, Beihang). -->
<html>
<head>
<title>SourceBuffer.mode == "sequence" test cases.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="mediasource-util.js"></script>
</head>
<body>
<div id="log"></div>
<script>
function mediasource_sequencemode_test(testFunction, description, options)
{
return mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
{
assert_greater_than(segmentInfo.media.length, 3, "at least 3 media segments for supported type");
mediaElement.addEventListener("error", test.unreached_func("Unexpected event 'error'"));
sourceBuffer.mode = "sequence";
assert_equals(sourceBuffer.mode, "sequence", "mode after setting it to \"sequence\"");
var initSegment = MediaSourceUtil.extractSegmentData(mediaData, segmentInfo.init);
test.expectEvent(sourceBuffer, "updatestart", "initSegment append started.");
test.expectEvent(sourceBuffer, "update", "initSegment append success.");
test.expectEvent(sourceBuffer, "updateend", "initSegment append ended.");
sourceBuffer.appendBuffer(initSegment);
test.waitForExpectedEvents(function()
{
assert_equals(sourceBuffer.timestampOffset, 0, "timestampOffset initially 0");
testFunction(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData);
});
}, description, options);
}
function append_segment(test, sourceBuffer, mediaData, info, callback)
{
var mediaSegment = MediaSourceUtil.extractSegmentData(mediaData, info);
test.expectEvent(sourceBuffer, "updatestart", "media segment append started.");
test.expectEvent(sourceBuffer, "update", "media segment append success.");
test.expectEvent(sourceBuffer, "updateend", "media segment append ended.");
sourceBuffer.appendBuffer(mediaSegment);
test.waitForExpectedEvents(callback);
}
function threeDecimalPlaces(number)
{
return Number(number.toFixed(3));
}
// Verifies expected times to 3 decimal places before and after mediaSource.endOfStream(),
// and calls |callback| on success.
function verify_offset_and_buffered(test, mediaSource, sourceBuffer,
expectedTimestampOffset, expectedBufferedRangeStartTime,
expectedBufferedRangeMaxEndTimeBeforeEOS,
expectedBufferedRangeEndTimeAfterEOS,
callback) {
assert_equals(threeDecimalPlaces(sourceBuffer.timestampOffset),
threeDecimalPlaces(expectedTimestampOffset),
"expectedTimestampOffset");
// Prior to EOS, the buffered range end time may not have fully reached the next media
// segment's timecode (adjusted by any timestampOffset). It should not exceed it though.
// Therefore, an exact assertBufferedEquals() will not work here.
assert_greater_than(sourceBuffer.buffered.length, 0, "sourceBuffer.buffered has at least 1 range before EOS");
assert_equals(threeDecimalPlaces(sourceBuffer.buffered.start(0)),
threeDecimalPlaces(expectedBufferedRangeStartTime),
"sourceBuffer.buffered range begins where expected before EOS");
assert_less_than_equal(threeDecimalPlaces(sourceBuffer.buffered.end(0)),
threeDecimalPlaces(expectedBufferedRangeMaxEndTimeBeforeEOS),
"sourceBuffer.buffered range ends at or before expected upper bound before EOS");
test.expectEvent(mediaSource, "sourceended", "mediaSource endOfStream");
mediaSource.endOfStream();
test.waitForExpectedEvents(function()
{
assertBufferedEquals(sourceBuffer,
"{ [" + expectedBufferedRangeStartTime.toFixed(3) + ", " + expectedBufferedRangeEndTimeAfterEOS.toFixed(3) + ") }",
"sourceBuffer.buffered after EOS");
callback();
});
}
mediasource_sequencemode_test(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
{
var offset = Math.min(segmentInfo.media[0].timev, segmentInfo.media[0].timea);
var expectedStart = Math.max(segmentInfo.media[0].timev, segmentInfo.media[0].timea) - offset;
var expectedEnd = Math.min(segmentInfo.media[0].endtimev, segmentInfo.media[0].endtimea) - offset;
var expectedEndEOS = Math.max(segmentInfo.media[0].endtimev, segmentInfo.media[0].endtimea) - offset;
append_segment(test, sourceBuffer, mediaData, segmentInfo.media[0], function()
{
verify_offset_and_buffered(test, mediaSource, sourceBuffer,
-offset, expectedStart,
expectedEnd, expectedEndEOS,
test.done);
});
}, "Test sequence AppendMode appendBuffer(first media segment)");
mediasource_sequencemode_test(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
{
var offset = Math.min(segmentInfo.media[1].timev, segmentInfo.media[1].timea);
var expectedStart = Math.max(segmentInfo.media[1].timev, segmentInfo.media[1].timea) - offset;
var expectedEnd = Math.min(segmentInfo.media[1].endtimev, segmentInfo.media[1].endtimea) - offset;
var expectedEndEOS = Math.max(segmentInfo.media[1].endtimev, segmentInfo.media[1].endtimea) - offset;
assert_greater_than(Math.min(segmentInfo.media[1].timev, segmentInfo.media[1].timea), 0,
"segment starts after time 0");
append_segment(test, sourceBuffer, mediaData, segmentInfo.media[1], function()
{
verify_offset_and_buffered(test, mediaSource, sourceBuffer,
-offset, expectedStart,
expectedEnd, expectedEndEOS,
test.done);
});
}, "Test sequence AppendMode appendBuffer(second media segment)");
mediasource_sequencemode_test(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
{
assert_greater_than(Math.min(segmentInfo.media[1].timev, segmentInfo.media[1].timea), 0,
"segment starts after time 0");
append_segment(test, sourceBuffer, mediaData, segmentInfo.media[1], function()
{
append_segment(test, sourceBuffer, mediaData, segmentInfo.media[0], function()
{
var firstOffset = Math.min(segmentInfo.media[1].timev, segmentInfo.media[1].timea);
var secondOffset = Math.max(segmentInfo.media[1].endtimev, segmentInfo.media[1].endtimea) - firstOffset;
var expectedStart = Math.max(segmentInfo.media[1].timev, segmentInfo.media[1].timea) - firstOffset;
var expectedEnd = Math.min(segmentInfo.media[0].endtimev, segmentInfo.media[0].endtimea) + secondOffset;
var expectedEndEOS = Math.max(segmentInfo.media[0].endtimev, segmentInfo.media[0].endtimea) + secondOffset;
// Current timestampOffset should reflect offset required to put media[0]
// immediately after media[1]'s highest frame end timestamp (as was adjusted
// by an earlier timestampOffset).
verify_offset_and_buffered(test, mediaSource, sourceBuffer,
secondOffset, expectedStart,
expectedEnd, expectedEndEOS,
test.done);
})
});
}, "Test sequence AppendMode appendBuffer(second media segment, then first media segment)");
</script>
</body>
</html>
