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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "content/renderer/media/webrtc/media_stream_remote_audio_track.h" | 5 #include "content/renderer/media/webrtc/media_stream_remote_audio_track.h" |
6 | 6 |
| 7 #include <list> |
| 8 |
7 #include "base/logging.h" | 9 #include "base/logging.h" |
| 10 #include "content/public/renderer/media_stream_audio_sink.h" |
8 #include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h" | 11 #include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h" |
9 | 12 |
10 namespace content { | 13 namespace content { |
11 | 14 |
| 15 class MediaStreamRemoteAudioTrack::AudioSink |
| 16 : public webrtc::AudioTrackSinkInterface { |
| 17 public: |
| 18 AudioSink() { |
| 19 } |
| 20 ~AudioSink() override { |
| 21 DCHECK(sinks_.empty()); |
| 22 } |
| 23 |
| 24 void Add(MediaStreamAudioSink* sink) { |
| 25 DCHECK(thread_checker_.CalledOnValidThread()); |
| 26 base::AutoLock lock(lock_); |
| 27 sinks_.push_back(sink); |
| 28 } |
| 29 |
| 30 void Remove(MediaStreamAudioSink* sink) { |
| 31 DCHECK(thread_checker_.CalledOnValidThread()); |
| 32 base::AutoLock lock(lock_); |
| 33 sinks_.remove(sink); |
| 34 } |
| 35 |
| 36 bool IsNeeded() const { |
| 37 DCHECK(thread_checker_.CalledOnValidThread()); |
| 38 return !sinks_.empty(); |
| 39 } |
| 40 |
| 41 const media::AudioParameters GetOutputFormat() const { |
| 42 base::AutoLock lock(lock_); |
| 43 return params_; |
| 44 } |
| 45 |
| 46 private: |
| 47 void OnData(const void* audio_data, int bits_per_sample, int sample_rate, |
| 48 int number_of_channels, size_t number_of_frames) override { |
| 49 if (!audio_bus_ || audio_bus_->channels() != number_of_channels || |
| 50 audio_bus_->frames() != static_cast<int>(number_of_frames)) { |
| 51 audio_bus_ = media::AudioBus::Create(number_of_channels, |
| 52 number_of_frames); |
| 53 } |
| 54 |
| 55 audio_bus_->FromInterleaved(audio_data, number_of_frames, |
| 56 bits_per_sample / 8); |
| 57 |
| 58 bool format_changed = false; |
| 59 if (params_.format() != media::AudioParameters::AUDIO_PCM_LOW_LATENCY || |
| 60 params_.channels() != number_of_channels || |
| 61 params_.sample_rate() != sample_rate || |
| 62 params_.frames_per_buffer() != static_cast<int>(number_of_frames)) { |
| 63 base::AutoLock lock(lock_); // Only lock on this thread when writing. |
| 64 params_ = media::AudioParameters( |
| 65 media::AudioParameters::AUDIO_PCM_LOW_LATENCY, |
| 66 media::GuessChannelLayout(number_of_channels), |
| 67 sample_rate, 16, number_of_frames); |
| 68 format_changed = true; |
| 69 } |
| 70 |
| 71 // TODO(tommi): We should get the timestamp from WebRTC. |
| 72 base::TimeTicks estimated_capture_time(base::TimeTicks::Now()); |
| 73 |
| 74 base::AutoLock lock(lock_); |
| 75 for (auto* sink : sinks_) { |
| 76 if (format_changed) |
| 77 sink->OnSetFormat(params_); |
| 78 sink->OnData(*audio_bus_.get(), estimated_capture_time); |
| 79 } |
| 80 } |
| 81 |
| 82 mutable base::Lock lock_; |
| 83 std::list<MediaStreamAudioSink*> sinks_; |
| 84 base::ThreadChecker thread_checker_; |
| 85 media::AudioParameters params_; |
| 86 scoped_ptr<media::AudioBus> audio_bus_; // Only used on the callback thread. |
| 87 }; |
| 88 |
12 MediaStreamRemoteAudioTrack::MediaStreamRemoteAudioTrack( | 89 MediaStreamRemoteAudioTrack::MediaStreamRemoteAudioTrack( |
13 const scoped_refptr<webrtc::AudioTrackInterface>& track) | 90 const scoped_refptr<webrtc::AudioTrackInterface>& track) |
14 : MediaStreamTrack(false), track_(track) { | 91 : MediaStreamAudioTrack(false), track_(track) { |
15 } | 92 } |
16 | 93 |
17 MediaStreamRemoteAudioTrack::~MediaStreamRemoteAudioTrack() { | 94 MediaStreamRemoteAudioTrack::~MediaStreamRemoteAudioTrack() { |
18 DCHECK(main_render_thread_checker_.CalledOnValidThread()); | 95 DCHECK(main_render_thread_checker_.CalledOnValidThread()); |
19 } | 96 } |
20 | 97 |
21 void MediaStreamRemoteAudioTrack::SetEnabled(bool enabled) { | 98 void MediaStreamRemoteAudioTrack::SetEnabled(bool enabled) { |
22 DCHECK(main_render_thread_checker_.CalledOnValidThread()); | 99 DCHECK(main_render_thread_checker_.CalledOnValidThread()); |
23 track_->set_enabled(enabled); | 100 track_->set_enabled(enabled); |
24 } | 101 } |
25 | 102 |
26 void MediaStreamRemoteAudioTrack::Stop() { | 103 void MediaStreamRemoteAudioTrack::Stop() { |
27 DCHECK(main_render_thread_checker_.CalledOnValidThread()); | 104 DCHECK(main_render_thread_checker_.CalledOnValidThread()); |
28 // Stop means that a track should be stopped permanently. But | 105 // Stop means that a track should be stopped permanently. But |
29 // since there is no proper way of doing that on a remote track, we can | 106 // since there is no proper way of doing that on a remote track, we can |
30 // at least disable the track. Blink will not call down to the content layer | 107 // at least disable the track. Blink will not call down to the content layer |
31 // after a track has been stopped. | 108 // after a track has been stopped. |
32 SetEnabled(false); | 109 SetEnabled(false); |
33 } | 110 } |
34 | 111 |
| 112 void MediaStreamRemoteAudioTrack::AddSink(MediaStreamAudioSink* sink) { |
| 113 DCHECK(main_render_thread_checker_.CalledOnValidThread()); |
| 114 |
| 115 if (!sink_) { |
| 116 sink_.reset(new AudioSink()); |
| 117 track_->AddSink(sink_.get()); |
| 118 } |
| 119 |
| 120 sink_->Add(sink); |
| 121 } |
| 122 |
| 123 void MediaStreamRemoteAudioTrack::RemoveSink(MediaStreamAudioSink* sink) { |
| 124 DCHECK(main_render_thread_checker_.CalledOnValidThread()); |
| 125 |
| 126 DCHECK(sink_); |
| 127 |
| 128 sink_->Remove(sink); |
| 129 |
| 130 if (!sink_->IsNeeded()) { |
| 131 track_->RemoveSink(sink_.get()); |
| 132 sink_.reset(); |
| 133 } |
| 134 } |
| 135 |
| 136 media::AudioParameters MediaStreamRemoteAudioTrack::GetOutputFormat() const { |
| 137 DCHECK(main_render_thread_checker_.CalledOnValidThread()); |
| 138 return sink_ ? sink_->GetOutputFormat() : media::AudioParameters(); |
| 139 } |
| 140 |
35 webrtc::AudioTrackInterface* MediaStreamRemoteAudioTrack::GetAudioAdapter() { | 141 webrtc::AudioTrackInterface* MediaStreamRemoteAudioTrack::GetAudioAdapter() { |
36 DCHECK(main_render_thread_checker_.CalledOnValidThread()); | 142 DCHECK(main_render_thread_checker_.CalledOnValidThread()); |
37 return track_.get(); | 143 return track_.get(); |
38 } | 144 } |
39 | 145 |
40 } // namespace content | 146 } // namespace content |
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