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Bug 1208371 - Add a MediaStreamTrackSource interface. r=roc

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This lets a MediaStreamTrack communicate with its source/producer on the
main thread. It's for now used for stopping a track at the source and
retrieving some metadata, but it could also be a link between actual
sinks of a track and the source, to for instance let the source optimize
by scaling down the resolution when all sinks want lowres-video.

MozReview-Commit-ID: D4SJLr0aqhJ
This commit is contained in:
Andreas Pehrson
2016-04-06 14:46:56 +02:00
parent 918f405cd2
commit cd7f617dd4
15 changed files with 299 additions and 112 deletions
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8
dom/html/HTMLMediaElement.cpp
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@@ -1905,11 +1905,15 @@ HTMLMediaElement::CaptureStreamInternal(bool aFinishWhenEnded,
// Expose the tracks to JS directly.
if (HasAudio()) {
TrackID audioTrackId = mMediaInfo.mAudio.mTrackId;
out->mStream->CreateOwnDOMTrack(audioTrackId, MediaSegment::AUDIO, nsString());
RefPtr<MediaStreamTrackSource> trackSource = new BasicUnstoppableTrackSource();
out->mStream->CreateOwnDOMTrack(audioTrackId, MediaSegment::AUDIO,
nsString(), trackSource);
}
if (HasVideo()) {
TrackID videoTrackId = mMediaInfo.mVideo.mTrackId;
out->mStream->CreateOwnDOMTrack(videoTrackId, MediaSegment::VIDEO, nsString());
RefPtr<MediaStreamTrackSource> trackSource = new BasicUnstoppableTrackSource();
out->mStream->CreateOwnDOMTrack(videoTrackId, MediaSegment::VIDEO,
nsString(), trackSource);
}
}
}