1 /* 2 * Copyright (C) 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <media/base/video_broadcaster.h> 20 #include <pc/video_track_source.h> 21 22 #include "host/frontend/webrtc/lib/video_sink.h" 23 24 namespace cuttlefish { 25 namespace webrtc_streaming { 26 27 class VideoTrackSourceImpl : public webrtc::VideoTrackSource { 28 public: 29 VideoTrackSourceImpl(int width, int height); 30 31 void OnFrame(std::shared_ptr<VideoFrameBuffer> frame, int64_t timestamp_us); 32 33 // Returns false if no stats are available, e.g, for a remote source, or a 34 // source which has not seen its first frame yet. 35 // 36 // Implementation should avoid blocking. 37 bool GetStats(Stats* stats) override; 38 39 bool SupportsEncodedOutput() const override; GenerateKeyFrame()40 void GenerateKeyFrame() override {} AddEncodedSink(rtc::VideoSinkInterface<webrtc::RecordableEncodedFrame> * sink)41 void AddEncodedSink( 42 rtc::VideoSinkInterface<webrtc::RecordableEncodedFrame>* sink) override {} RemoveEncodedSink(rtc::VideoSinkInterface<webrtc::RecordableEncodedFrame> * sink)43 void RemoveEncodedSink( 44 rtc::VideoSinkInterface<webrtc::RecordableEncodedFrame>* sink) override {} 45 46 protected: 47 rtc::VideoSourceInterface<webrtc::VideoFrame>* source() override; 48 49 private: 50 int width_; 51 int height_; 52 rtc::VideoBroadcaster broadcaster_; 53 }; 54 55 // Wraps a VideoTrackSourceImpl as an implementation of the VideoSink interface. 56 // This is needed as the VideoTrackSourceImpl is a reference counted object that 57 // should only be referenced by rtc::scoped_refptr pointers, but the 58 // VideoSink interface is not a reference counted object and therefore not 59 // compatible with that kind of pointers. This class can be referenced by a 60 // shared pointer and it in turn holds a scoped_refptr to the wrapped object. 61 class VideoTrackSourceImplSinkWrapper : public VideoSink { 62 public: 63 virtual ~VideoTrackSourceImplSinkWrapper() = default; 64 VideoTrackSourceImplSinkWrapper(rtc::scoped_refptr<VideoTrackSourceImpl> obj)65 VideoTrackSourceImplSinkWrapper(rtc::scoped_refptr<VideoTrackSourceImpl> obj) 66 : track_source_impl_(obj) {} 67 OnFrame(std::shared_ptr<VideoFrameBuffer> frame,int64_t timestamp_us)68 void OnFrame(std::shared_ptr<VideoFrameBuffer> frame, 69 int64_t timestamp_us) override { 70 track_source_impl_->OnFrame(frame, timestamp_us); 71 } 72 73 private: 74 rtc::scoped_refptr<VideoTrackSourceImpl> track_source_impl_; 75 }; 76 77 } // namespace webrtc_streaming 78 } // namespace cuttlefish 79