| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>media-source-real-reinitialize</title> |
| <script src="mp4-generator.js"></script> |
| <script src="../video-test.js"></script> |
| <script> |
| // Tests that appending a second initialization segment with matching tracks |
| // succeeds and doesn't disrupt existing buffered data. |
| // MSE spec section 3.3.2 "Initialization Segment Received" — when a second |
| // init segment arrives, track count and types must match the first. |
| // Weakly tested — minimal real-parser coverage. |
| |
| var source; |
| var sourceBuffer; |
| |
| async function runTest() { |
| findMediaElement(); |
| |
| source = new MediaSource(); |
| video.src = URL.createObjectURL(source); |
| await waitFor(source, 'sourceopen'); |
| |
| sourceBuffer = source.addSourceBuffer(MP4.VIDEO_TYPE); |
| |
| var initData = MP4.initSegment({ |
| timescale: 1000, |
| tracks: [{ id: 1, type: 'video', timescale: 1000 }] |
| }); |
| |
| // First init |
| sourceBuffer.appendBuffer(initData); |
| await waitFor(sourceBuffer, 'updateend'); |
| |
| testExpected('sourceBuffer.videoTracks.length', 1); |
| |
| // Append media |
| var media = MP4.mediaSegment({ |
| sequenceNumber: 1, |
| tracks: [{ id: 1, type: 'video', baseDecodeTime: 0, samples: [ |
| { duration: 1000, compositionTimeOffset: 0, isSync: true }, |
| { duration: 1000, compositionTimeOffset: 0, isSync: false }, |
| { duration: 1000, compositionTimeOffset: 0, isSync: false }, |
| { duration: 1000, compositionTimeOffset: 0, isSync: false }, |
| ]}] |
| }); |
| sourceBuffer.appendBuffer(media); |
| await waitFor(sourceBuffer, 'updateend'); |
| |
| testExpected('sourceBuffer.buffered.length', 1); |
| testExpectedEqualWithTolerance('sourceBuffer.buffered.end(0)', 4, 0.01); |
| |
| // Second init — same tracks, should succeed without disrupting buffered data |
| sourceBuffer.appendBuffer(initData); |
| await waitFor(sourceBuffer, 'updateend'); |
| |
| testExpected('source.readyState', 'open'); |
| testExpected('sourceBuffer.videoTracks.length', 1); |
| testExpected('sourceBuffer.buffered.length', 1); |
| testExpectedEqualWithTolerance('sourceBuffer.buffered.end(0)', 4, 0.01); |
| |
| // Append more media after re-init — should extend the buffer |
| var media2 = MP4.mediaSegment({ |
| sequenceNumber: 2, |
| tracks: [{ id: 1, type: 'video', baseDecodeTime: 4000, samples: [ |
| { duration: 1000, compositionTimeOffset: 0, isSync: true }, |
| { duration: 1000, compositionTimeOffset: 0, isSync: false }, |
| ]}] |
| }); |
| sourceBuffer.appendBuffer(media2); |
| await waitFor(sourceBuffer, 'updateend'); |
| |
| testExpected('source.readyState', 'open'); |
| testExpected('sourceBuffer.buffered.length', 1); |
| testExpectedEqualWithTolerance('sourceBuffer.buffered.end(0)', 6, 0.01); |
| } |
| |
| window.addEventListener('load', event => { |
| runTest().then(endTest).catch(failTest); |
| }); |
| </script> |
| </head> |
| <body> |
| <video></video> |
| </body> |
| </html> |
