commit | b53f779b059f9c04c4f72555596fb754ac08274b | [log] [tgz] |
---|---|---|
author | Dale Curtis <dalecurtis@chromium.org> | Tue Jun 08 23:26:36 2021 |
committer | Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> | Wed Jun 09 00:02:05 2021 |
tree | 5009172066f608bf441a4793d99a5223d4ab1662 | |
parent | 349d7714bde23d1d2b12a61d6b63e3307c0d98cf [diff] |
[WebCodecs] Implement keyframe enforcement for flush, configure. This change checks that the first encoded chunk after a flush() or configure() is a keyframe. For AV1, VP8, VP9, and H.264 the bitstream is analyzed to ensure the packet is actually a key frame. Since Chromium doesn't have a Theora or xHE-AAC parser, no analysis is done for those codecs beyond checking that the type field is set to 'key'. On platforms without libvpx or libaom, we will also skip bitstream analysis. I originally wrote this change using the media::Vp8Parser and media::Vp9Parser classes, but since they are not currently used on Android that brings in 16k+ of binary size. As such I've switched to using libvpx for bitstream analysis. This change also adds AV1 and VP8 to our list of tested codecs. This change also fixes an issue with the AudioEncoder where it was marking all frames as delta frames instead of keyframes. Fixed: 1213680 Change-Id: Ibd8fb9daeb6519c8a72aec66bdc4711261113e28 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2921021 Commit-Queue: Dale Curtis <dalecurtis@chromium.org> Reviewed-by: James Zern <jzern@google.com> Reviewed-by: Chrome Cunningham <chcunningham@chromium.org> Cr-Commit-Position: refs/heads/master@{#890463}
The web-platform-tests Project is a cross-browser test suite for the Web-platform stack. Writing tests in a way that allows them to be run in all browsers gives browser projects confidence that they are shipping software that is compatible with other implementations, and that later implementations will be compatible with their implementations. This in turn gives Web authors/developers confidence that they can actually rely on the Web platform to deliver on the promise of working across browsers and devices without needing extra layers of abstraction to paper over the gaps left by specification editors and implementors.
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