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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CONTENT_RENDERER_MEDIA_WEBRTC_LOCAL_AUDIO_TRACK_H_ |
| 6 #define CONTENT_RENDERER_MEDIA_WEBRTC_LOCAL_AUDIO_TRACK_H_ |
| 7 |
| 8 #include <list> |
| 9 #include <string> |
| 10 |
| 11 #include "base/macros.h" |
| 12 #include "base/memory/ref_counted.h" |
| 13 #include "base/synchronization/lock.h" |
| 14 #include "base/threading/thread_checker.h" |
| 15 #include "content/renderer/media/media_stream_audio_track.h" |
| 16 #include "content/renderer/media/tagged_list.h" |
| 17 #include "content/renderer/media/webrtc/webrtc_local_audio_track_adapter.h" |
| 18 #include "media/base/audio_parameters.h" |
| 19 |
| 20 namespace media { |
| 21 class AudioBus; |
| 22 } |
| 23 |
| 24 namespace content { |
| 25 |
| 26 class MediaStreamAudioLevelCalculator; |
| 27 class MediaStreamAudioProcessor; |
| 28 class MediaStreamAudioSink; |
| 29 class MediaStreamAudioSinkOwner; |
| 30 class MediaStreamAudioTrackSink; |
| 31 |
| 32 // A WebRtcLocalAudioTrack manages thread-safe connects/disconnects to sinks, |
| 33 // and the delivery of audio data from the source to the sinks. |
| 34 class CONTENT_EXPORT WebRtcLocalAudioTrack |
| 35 : NON_EXPORTED_BASE(public MediaStreamAudioTrack) { |
| 36 public: |
| 37 explicit WebRtcLocalAudioTrack( |
| 38 scoped_refptr<WebRtcLocalAudioTrackAdapter> adapter); |
| 39 |
| 40 ~WebRtcLocalAudioTrack() override; |
| 41 |
| 42 // Add a sink to the track. This function will trigger a OnSetFormat() |
| 43 // call on the |sink|. |
| 44 // Called on the main render thread. |
| 45 void AddSink(MediaStreamAudioSink* sink) override; |
| 46 |
| 47 // Remove a sink from the track. |
| 48 // Called on the main render thread. |
| 49 void RemoveSink(MediaStreamAudioSink* sink) override; |
| 50 |
| 51 // Overrides for MediaStreamTrack. |
| 52 void SetEnabled(bool enabled) override; |
| 53 webrtc::AudioTrackInterface* GetAudioAdapter() override; |
| 54 media::AudioParameters GetOutputFormat() const override; |
| 55 |
| 56 // Method called by the capturer to deliver the capture data. |
| 57 // Called on the capture audio thread. |
| 58 void Capture(const media::AudioBus& audio_bus, |
| 59 base::TimeTicks estimated_capture_time); |
| 60 |
| 61 // Method called by the capturer to set the audio parameters used by source |
| 62 // of the capture data.. |
| 63 // Called on the capture audio thread. |
| 64 void OnSetFormat(const media::AudioParameters& params); |
| 65 |
| 66 // Called by the capturer before the audio data flow begins to set the object |
| 67 // that provides shared access to the current audio signal level. |
| 68 void SetLevel(scoped_refptr<MediaStreamAudioLevelCalculator::Level> level); |
| 69 |
| 70 // Called by the capturer before the audio data flow begins to provide a |
| 71 // reference to the audio processor so that the track can query stats from it. |
| 72 void SetAudioProcessor(scoped_refptr<MediaStreamAudioProcessor> processor); |
| 73 |
| 74 private: |
| 75 typedef TaggedList<MediaStreamAudioTrackSink> SinkList; |
| 76 |
| 77 // MediaStreamAudioTrack override. |
| 78 void OnStop() final; |
| 79 |
| 80 // All usage of libjingle is through this adapter. The adapter holds |
| 81 // a pointer to this object, but no reference. |
| 82 const scoped_refptr<WebRtcLocalAudioTrackAdapter> adapter_; |
| 83 |
| 84 // A tagged list of sinks that the audio data is fed to. Tags |
| 85 // indicate tracks that need to be notified that the audio format |
| 86 // has changed. |
| 87 SinkList sinks_; |
| 88 |
| 89 // Tests that methods are called on libjingle's signaling thread. |
| 90 base::ThreadChecker signal_thread_checker_; |
| 91 |
| 92 // Used to DCHECK that some methods are called on the capture audio thread. |
| 93 base::ThreadChecker capture_thread_checker_; |
| 94 |
| 95 // Protects |params_| and |sinks_|. |
| 96 mutable base::Lock lock_; |
| 97 |
| 98 // Audio parameters of the audio capture stream. |
| 99 media::AudioParameters audio_parameters_; |
| 100 |
| 101 DISALLOW_COPY_AND_ASSIGN(WebRtcLocalAudioTrack); |
| 102 }; |
| 103 |
| 104 } // namespace content |
| 105 |
| 106 #endif // CONTENT_RENDERER_MEDIA_WEBRTC_LOCAL_AUDIO_TRACK_H_ |
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