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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 #ifndef CONTENT_RENDERER_MEDIA_WEBAUDIO_CAPTURER_SOURCE_H_ | 5 #ifndef CONTENT_RENDERER_MEDIA_WEBAUDIO_CAPTURER_SOURCE_H_ |
| 6 #define CONTENT_RENDERER_MEDIA_WEBAUDIO_CAPTURER_SOURCE_H_ | 6 #define CONTENT_RENDERER_MEDIA_WEBAUDIO_CAPTURER_SOURCE_H_ |
| 7 | 7 |
| 8 #include "base/memory/ref_counted.h" | 8 #include "base/memory/ref_counted.h" |
| 9 #include "base/synchronization/lock.h" | 9 #include "base/synchronization/lock.h" |
| 10 #include "base/threading/thread_checker.h" | 10 #include "base/threading/thread_checker.h" |
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| 27 // 2. consumeAudio() is called periodically by WebKit which dispatches the | 27 // 2. consumeAudio() is called periodically by WebKit which dispatches the |
| 28 // audio stream to the WebRtcLocalAudioTrack::Capture() method. | 28 // audio stream to the WebRtcLocalAudioTrack::Capture() method. |
| 29 class WebAudioCapturerSource | 29 class WebAudioCapturerSource |
| 30 : public base::RefCountedThreadSafe<WebAudioCapturerSource>, | 30 : public base::RefCountedThreadSafe<WebAudioCapturerSource>, |
| 31 public blink::WebAudioDestinationConsumer { | 31 public blink::WebAudioDestinationConsumer { |
| 32 public: | 32 public: |
| 33 WebAudioCapturerSource(); | 33 WebAudioCapturerSource(); |
| 34 | 34 |
| 35 // WebAudioDestinationConsumer implementation. | 35 // WebAudioDestinationConsumer implementation. |
| 36 // setFormat() is called early on, so that we can configure the audio track. | 36 // setFormat() is called early on, so that we can configure the audio track. |
| 37 virtual void setFormat(size_t number_of_channels, float sample_rate) OVERRIDE; | 37 virtual void setFormat(size_t number_of_channels, float sample_rate) override; |
| 38 // MediaStreamAudioDestinationNode periodically calls consumeAudio(). | 38 // MediaStreamAudioDestinationNode periodically calls consumeAudio(). |
| 39 // Called on the WebAudio audio thread. | 39 // Called on the WebAudio audio thread. |
| 40 virtual void consumeAudio(const blink::WebVector<const float*>& audio_data, | 40 virtual void consumeAudio(const blink::WebVector<const float*>& audio_data, |
| 41 size_t number_of_frames) OVERRIDE; | 41 size_t number_of_frames) override; |
| 42 | 42 |
| 43 // Called when the WebAudioCapturerSource is hooking to a media audio track. | 43 // Called when the WebAudioCapturerSource is hooking to a media audio track. |
| 44 // |track| is the sink of the data flow. |source_provider| is the source of | 44 // |track| is the sink of the data flow. |source_provider| is the source of |
| 45 // the data flow where stream information like delay, volume, key_pressed, | 45 // the data flow where stream information like delay, volume, key_pressed, |
| 46 // is stored. | 46 // is stored. |
| 47 void Start(WebRtcLocalAudioTrack* track, WebRtcAudioCapturer* capturer); | 47 void Start(WebRtcLocalAudioTrack* track, WebRtcAudioCapturer* capturer); |
| 48 | 48 |
| 49 // Called when the media audio track is stopping. | 49 // Called when the media audio track is stopping. |
| 50 void Stop(); | 50 void Stop(); |
| 51 | 51 |
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| 87 // Synchronizes HandleCapture() with AudioCapturerSource calls. | 87 // Synchronizes HandleCapture() with AudioCapturerSource calls. |
| 88 base::Lock lock_; | 88 base::Lock lock_; |
| 89 bool started_; | 89 bool started_; |
| 90 | 90 |
| 91 DISALLOW_COPY_AND_ASSIGN(WebAudioCapturerSource); | 91 DISALLOW_COPY_AND_ASSIGN(WebAudioCapturerSource); |
| 92 }; | 92 }; |
| 93 | 93 |
| 94 } // namespace content | 94 } // namespace content |
| 95 | 95 |
| 96 #endif // CONTENT_RENDERER_MEDIA_WEBAUDIO_CAPTURER_SOURCE_H_ | 96 #endif // CONTENT_RENDERER_MEDIA_WEBAUDIO_CAPTURER_SOURCE_H_ |
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