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| 1 /* | 1 /* |
| 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
| 5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
| 6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ | 9 */ |
| 10 | 10 |
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| 26 | 26 |
| 27 // VideoBroadcaster broadcast video frames to sinks and combines | 27 // VideoBroadcaster broadcast video frames to sinks and combines |
| 28 // VideoSinkWants from its sinks. It does that by implementing | 28 // VideoSinkWants from its sinks. It does that by implementing |
| 29 // rtc::VideoSourceInterface and rtc::VideoSinkInterface. | 29 // rtc::VideoSourceInterface and rtc::VideoSinkInterface. |
| 30 // Sinks must be added and removed on one and only one thread. | 30 // Sinks must be added and removed on one and only one thread. |
| 31 // Video frames can be broadcasted on any thread. I.e VideoBroadcaster::OnFrame | 31 // Video frames can be broadcasted on any thread. I.e VideoBroadcaster::OnFrame |
| 32 // can be called on any thread. | 32 // can be called on any thread. |
| 33 class VideoBroadcaster : public VideoSourceBase, | 33 class VideoBroadcaster : public VideoSourceBase, |
| 34 public VideoSinkInterface<cricket::VideoFrame> { | 34 public VideoSinkInterface<cricket::VideoFrame> { |
| 35 public: | 35 public: |
| 36 VideoBroadcaster(); | |
| 37 void AddOrUpdateSink(VideoSinkInterface<cricket::VideoFrame>* sink, | 36 void AddOrUpdateSink(VideoSinkInterface<cricket::VideoFrame>* sink, |
| 38 const VideoSinkWants& wants) override; | 37 const VideoSinkWants& wants) override; |
| 39 void RemoveSink(VideoSinkInterface<cricket::VideoFrame>* sink) override; | 38 void RemoveSink(VideoSinkInterface<cricket::VideoFrame>* sink) override; |
| 40 | 39 |
| 41 // Returns true if the next frame will be delivered to at least one sink. | 40 // Returns true if the next frame will be delivered to at least one sink. |
| 42 bool frame_wanted() const; | 41 bool frame_wanted() const; |
| 43 | 42 |
| 44 // Returns VideoSinkWants a source is requested to fulfill. They are | 43 // Returns VideoSinkWants a source is requested to fulfill. They are |
| 45 // aggregated by all VideoSinkWants from all sinks. | 44 // aggregated by all VideoSinkWants from all sinks. |
| 46 VideoSinkWants wants() const; | 45 VideoSinkWants wants() const; |
| 47 | 46 |
| 48 void OnFrame(const cricket::VideoFrame& frame) override; | 47 void OnFrame(const cricket::VideoFrame& frame) override; |
| 49 | 48 |
| 50 protected: | 49 protected: |
| 51 void UpdateWants() EXCLUSIVE_LOCKS_REQUIRED(sinks_and_wants_lock_); | 50 void UpdateWants() EXCLUSIVE_LOCKS_REQUIRED(sinks_and_wants_lock_); |
| 52 const cricket::VideoFrame& GetBlackFrame(const cricket::VideoFrame& frame) | 51 const cricket::VideoFrame& GetBlackFrame(const cricket::VideoFrame& frame) |
| 53 EXCLUSIVE_LOCKS_REQUIRED(sinks_and_wants_lock_); | 52 EXCLUSIVE_LOCKS_REQUIRED(sinks_and_wants_lock_); |
| 54 | 53 |
| 55 ThreadChecker thread_checker_; | |
| 56 rtc::CriticalSection sinks_and_wants_lock_; | 54 rtc::CriticalSection sinks_and_wants_lock_; |
| 57 | 55 |
| 58 VideoSinkWants current_wants_ GUARDED_BY(sinks_and_wants_lock_); | 56 VideoSinkWants current_wants_ GUARDED_BY(sinks_and_wants_lock_); |
| 59 std::unique_ptr<cricket::WebRtcVideoFrame> black_frame_; | 57 std::unique_ptr<cricket::WebRtcVideoFrame> black_frame_; |
| 60 }; | 58 }; |
| 61 | 59 |
| 62 } // namespace rtc | 60 } // namespace rtc |
| 63 | 61 |
| 64 #endif // WEBRTC_MEDIA_BASE_VIDEOBROADCASTER_H_ | 62 #endif // WEBRTC_MEDIA_BASE_VIDEOBROADCASTER_H_ |
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