| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>media-source-append-acb-tolerance</title> |
| <script src="mock-media-source.js"></script> |
| <script src="../video-test.js"></script> |
| <script> |
| var source; |
| var sourceBuffer; |
| var initSegment; |
| var bufferedSamples; |
| var enqueuedSamples; |
| |
| if (window.internals) |
| internals.initializeMockMediaSource(); |
| |
| function impreciseSampleRun(start, end) { |
| // A common case for WebM files is for duration to have greater precision than timestamps. |
| // This is because DefaultDuration is always set in nanoseconds (per spec), while other timestamps are set in |
| // Timescale (usually milliseconds). |
| // These settings try to replicate the timing found in a typical WebM 30 fps video. |
| // Duration here is set to microseconds instead of nanoseconds because otherwise MockSampleBox would overflow |
| // after just 2.133 seconds. |
| const samples = []; |
| const fps = 30; |
| const numFrames = (end - start) * fps; |
| for (let numFrame = 0; numFrame < numFrames; numFrame++) { |
| const ptsMilliseconds = Math.round(1000 * (start + numFrame / fps)); |
| const durationMicroseconds = 33333; |
| samples.push(makeASample(1000 * ptsMilliseconds, 1000 * ptsMilliseconds, durationMicroseconds, 1e6, |
| 1, numFrame === 0 ? SAMPLE_FLAG.SYNC : SAMPLE_FLAG.NONE)); |
| } |
| return concatenateSamples(samples); |
| } |
| |
| window.addEventListener('load', async () => { |
| findMediaElement(); |
| source = new MediaSource(); |
| testExpected('source.readyState', 'closed'); |
| const sourceOpened = waitFor(source, 'sourceopen'); |
| |
| const videoSource = document.createElement('source'); |
| videoSource.type = 'video/mock; codecs=mock'; |
| videoSource.src = URL.createObjectURL(source); |
| video.appendChild(videoSource); |
| |
| await sourceOpened; |
| run('sourceBuffer = source.addSourceBuffer("video/mock; codecs=mock")'); |
| |
| initSegment = makeAInit(15, [makeATrack(1, 'mock', TRACK_KIND.VIDEO)]); |
| |
| run('sourceBuffer.appendBuffer(initSegment)'); |
| await waitFor(sourceBuffer, 'updateend'); |
| |
| // Segment A |
| run('sourceBuffer.appendBuffer(impreciseSampleRun(0, 5))'); |
| await waitFor(sourceBuffer, 'updateend'); |
| |
| // Segment C |
| run('sourceBuffer.appendBuffer(impreciseSampleRun(10, 15))'); |
| await waitFor(sourceBuffer, 'updateend'); |
| |
| // Segment B |
| run('sourceBuffer.appendBuffer(impreciseSampleRun(5, 10))'); |
| await waitFor(sourceBuffer, 'updateend'); |
| |
| bufferedSamples = internals.bufferedSamplesForTrackID(sourceBuffer, 1); |
| enqueuedSamples = internals.enqueuedSamplesForTrackID(sourceBuffer, 1); |
| |
| // 30 samples were appended in total. All of them should have ended up in buffered samples and in the decode queue. |
| testExpected('bufferedSamples.length', 15 * 30); |
| testExpected('enqueuedSamples.length', 15 * 30); |
| |
| enqueuedSamples.forEach(consoleWrite); |
| |
| endTest(); |
| }); |
| </script> |
| </head> |
| <body> |
| <video controls></video> |
| </body> |
| </html> |
