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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 #ifndef CHROME_RENDERER_MEDIA_CAST_RECEIVER_AUDIO_VALVE_H_ | 5 #ifndef CHROME_RENDERER_MEDIA_CAST_RECEIVER_AUDIO_VALVE_H_ |
6 #define CHROME_RENDERER_MEDIA_CAST_RECEIVER_AUDIO_VALVE_H_ | 6 #define CHROME_RENDERER_MEDIA_CAST_RECEIVER_AUDIO_VALVE_H_ |
7 | 7 |
8 #include "base/synchronization/lock.h" | 8 #include "base/synchronization/lock.h" |
9 #include "media/base/audio_capturer_source.h" | 9 #include "media/base/audio_capturer_source.h" |
| 10 #include "media/base/audio_rechunker.h" |
10 | 11 |
11 namespace media { | 12 namespace media { |
12 class AudioBus; | 13 class AudioBus; |
13 } | 14 } |
14 | 15 |
15 // Forwards calls to |cb| until Stop is called. | 16 // Forwards calls to |cb| until Stop is called. If the client requested a |
| 17 // different buffer size than that provided by the Cast Receiver, AudioRechunker |
| 18 // is used to rectify that. |
| 19 // |
16 // Thread-safe. | 20 // Thread-safe. |
17 // All functions may block depending on contention. | 21 // All functions may block depending on contention. |
18 class CastReceiverAudioValve : | 22 class CastReceiverAudioValve : |
19 public media::AudioCapturerSource::CaptureCallback, | |
20 public base::RefCountedThreadSafe<CastReceiverAudioValve> { | 23 public base::RefCountedThreadSafe<CastReceiverAudioValve> { |
21 public: | 24 public: |
22 explicit CastReceiverAudioValve( | 25 CastReceiverAudioValve(const media::AudioParameters& params, |
23 media::AudioCapturerSource::CaptureCallback* cb); | 26 media::AudioCapturerSource::CaptureCallback* cb); |
24 | 27 |
25 // AudioCapturerSource::CaptureCallback implementation. | 28 // Called on an unknown thread to provide more decoded audio data from the |
26 void Capture(const media::AudioBus* audio_source, | 29 // Cast Receiver. |
27 int audio_delay_milliseconds, | 30 void DeliverDecodedAudio(const media::AudioBus* audio_bus, |
28 double volume, | 31 base::TimeTicks playout_time); |
29 bool key_pressed) override; | |
30 void OnCaptureError(const std::string& message) override; | |
31 | 32 |
32 // When this returns, no more calls will be forwarded to |cb|. | 33 // When this returns, no more calls will be forwarded to |cb|. |
33 void Stop(); | 34 void Stop(); |
34 | 35 |
35 private: | 36 private: |
36 friend class base::RefCountedThreadSafe<CastReceiverAudioValve>; | 37 friend class base::RefCountedThreadSafe<CastReceiverAudioValve>; |
37 ~CastReceiverAudioValve() override; | 38 |
| 39 ~CastReceiverAudioValve(); |
| 40 |
| 41 // Called by AudioRechunker zero or more times during the call to |
| 42 // Capture(). Delivers audio data in the required buffer size to |cb_|. |
| 43 void DeliverRechunkedAudio(const media::AudioBus& audio_bus, |
| 44 base::TimeDelta timestamp); |
| 45 |
38 media::AudioCapturerSource::CaptureCallback* cb_; | 46 media::AudioCapturerSource::CaptureCallback* cb_; |
39 base::Lock lock_; | 47 base::Lock lock_; |
| 48 |
| 49 media::AudioRechunker rechunker_; |
40 }; | 50 }; |
41 | 51 |
42 #endif // CHROME_RENDERER_MEDIA_CAST_RECEIVER_AUDIO_VALVE_H_ | 52 #endif // CHROME_RENDERER_MEDIA_CAST_RECEIVER_AUDIO_VALVE_H_ |
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