Add support for content hints to VideoTrack.
Permits overriding the source-default is_screencast option to be able to
treat screencast sources as fluid video, preserving motion at the loss
of individual frame quality (or vice versa).
BUG=chromium:653531
R=deadbeef@webrtc.org
Review-Url: https://codereview.webrtc.org/2579993003
Cr-Commit-Position: refs/heads/master@{#15659}
diff --git a/webrtc/api/mediastreaminterface.h b/webrtc/api/mediastreaminterface.h
index baebad7..eb51633 100644
--- a/webrtc/api/mediastreaminterface.h
+++ b/webrtc/api/mediastreaminterface.h
@@ -133,13 +133,21 @@
: public MediaStreamTrackInterface,
public rtc::VideoSourceInterface<VideoFrame> {
public:
+ // Video track content hint, used to override the source is_screencast
+ // property.
+ // See https://crbug.com/653531 and https://github.com/WICG/mst-content-hint.
+ enum class ContentHint { kNone, kFluid, kDetailed };
+
// Register a video sink for this track.
void AddOrUpdateSink(rtc::VideoSinkInterface<VideoFrame>* sink,
- const rtc::VideoSinkWants& wants) override{};
- void RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) override{};
+ const rtc::VideoSinkWants& wants) override {}
+ void RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) override {}
virtual VideoTrackSourceInterface* GetSource() const = 0;
+ virtual ContentHint content_hint() const { return ContentHint::kNone; }
+ virtual void set_content_hint(ContentHint hint) {}
+
protected:
virtual ~VideoTrackInterface() {}
};