1 /* 2 * Copyright 2011 The WebRTC project authors. All Rights Reserved. 3 * 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 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef PC_AUDIO_TRACK_H_ 12 #define PC_AUDIO_TRACK_H_ 13 14 #include <string> 15 16 #include "api/media_stream_interface.h" 17 #include "api/media_stream_track.h" 18 #include "api/scoped_refptr.h" 19 #include "api/sequence_checker.h" 20 #include "rtc_base/system/no_unique_address.h" 21 22 namespace webrtc { 23 24 // TODO(tommi): Instead of inheriting from `MediaStreamTrack<>`, implement the 25 // properties directly in this class. `MediaStreamTrack` doesn't guard against 26 // conflicting access, so we'd need to override those methods anyway in this 27 // class in order to make sure things are correctly checked. 28 class AudioTrack : public MediaStreamTrack<AudioTrackInterface>, 29 public ObserverInterface { 30 protected: 31 // Protected ctor to force use of factory method. 32 AudioTrack(absl::string_view label, 33 const rtc::scoped_refptr<AudioSourceInterface>& source); 34 35 AudioTrack() = delete; 36 AudioTrack(const AudioTrack&) = delete; 37 AudioTrack& operator=(const AudioTrack&) = delete; 38 39 ~AudioTrack() override; 40 41 public: 42 static rtc::scoped_refptr<AudioTrack> Create( 43 absl::string_view id, 44 const rtc::scoped_refptr<AudioSourceInterface>& source); 45 46 // MediaStreamTrack implementation. 47 std::string kind() const override; 48 49 // AudioTrackInterface implementation. 50 AudioSourceInterface* GetSource() const override; 51 52 void AddSink(AudioTrackSinkInterface* sink) override; 53 void RemoveSink(AudioTrackSinkInterface* sink) override; 54 55 private: 56 // ObserverInterface implementation. 57 void OnChanged() override; 58 59 private: 60 const rtc::scoped_refptr<AudioSourceInterface> audio_source_; 61 RTC_NO_UNIQUE_ADDRESS webrtc::SequenceChecker signaling_thread_checker_; 62 }; 63 64 } // namespace webrtc 65 66 #endif // PC_AUDIO_TRACK_H_ 67