Automatic update from web-platform-tests
MSE: Fix mediasource-changetype-play to work with MseBufferByPts
This web-platform-test exercises changeType as it splice-overlaps
pairs of audio or video media streams at varying offsets in the
presentation timeline. Splice-overlapping an out-of-order decode stream
(such as the test AVC MP4 media) at arbitrary times can, per spec, drop
significant decode dependencies from a partially-overlapped GOP such
that a buffered range gap could result.
This change is more careful about where it performs splice-overlaps when
the overlapped media is out-of-order-decode, adjusting the splice point
to be at or very near to the next overlapped keyframe. This prevents
removing out-of-order non-keyframes and their dependents from the
overlapped media such that no buffered range gap nor playback stall
should result.
Note that Chromium is sensitive to such out-of-order buffering overlaps
with the new, compliant, MseBufferByPts behavior. Fixing
https://github.com/w3c/media-source/issues/160 could greatly simplify
this problem by allowing apps to explicitly control how the
user agent behaves at these small gaps.
BUG=807793
Change-Id: I020e244c230756eaa1804f81b58a577124a6a28b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1428601
Commit-Queue: Matthew Wolenetz <wolenetz@chromium.org>
Reviewed-by: Dan Sanders <sandersd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#643473}
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wpt-commits: 27ad6759d421b95b4572f20cabaeb750b3eb9799
wpt-pr: 15991
