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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 "base/time/time.h" |
9 #include "media/base/audio_capturer_source.h" | 10 #include "media/base/audio_capturer_source.h" |
| 11 #include "media/base/audio_push_fifo.h" |
10 | 12 |
11 namespace media { | 13 namespace media { |
12 class AudioBus; | 14 class AudioBus; |
13 } | 15 } |
14 | 16 |
15 // Forwards calls to |cb| until Stop is called. | 17 // Forwards calls to |cb| until Stop is called. If the client requested a |
| 18 // different buffer size than that provided by the Cast Receiver, AudioPushFifo |
| 19 // is used to rectify that. |
| 20 // |
16 // Thread-safe. | 21 // Thread-safe. |
17 // All functions may block depending on contention. | 22 // All functions may block depending on contention. |
18 class CastReceiverAudioValve : | 23 class CastReceiverAudioValve : |
19 public media::AudioCapturerSource::CaptureCallback, | |
20 public base::RefCountedThreadSafe<CastReceiverAudioValve> { | 24 public base::RefCountedThreadSafe<CastReceiverAudioValve> { |
21 public: | 25 public: |
22 explicit CastReceiverAudioValve( | 26 CastReceiverAudioValve(const media::AudioParameters& params, |
23 media::AudioCapturerSource::CaptureCallback* cb); | 27 media::AudioCapturerSource::CaptureCallback* cb); |
24 | 28 |
25 // AudioCapturerSource::CaptureCallback implementation. | 29 // Called on an unknown thread to provide more decoded audio data from the |
26 void Capture(const media::AudioBus* audio_source, | 30 // Cast Receiver. |
27 int audio_delay_milliseconds, | 31 void DeliverDecodedAudio(const media::AudioBus* audio_bus, |
28 double volume, | 32 base::TimeTicks playout_time); |
29 bool key_pressed) override; | |
30 void OnCaptureError(const std::string& message) override; | |
31 | 33 |
32 // When this returns, no more calls will be forwarded to |cb|. | 34 // When this returns, no more calls will be forwarded to |cb|. |
33 void Stop(); | 35 void Stop(); |
34 | 36 |
35 private: | 37 private: |
36 friend class base::RefCountedThreadSafe<CastReceiverAudioValve>; | 38 friend class base::RefCountedThreadSafe<CastReceiverAudioValve>; |
37 ~CastReceiverAudioValve() override; | 39 |
| 40 ~CastReceiverAudioValve(); |
| 41 |
| 42 // Called by AudioPushFifo zero or more times during the call to Capture(). |
| 43 // Delivers audio data in the required buffer size to |cb_|. |
| 44 void DeliverRebufferedAudio(const media::AudioBus& audio_bus, |
| 45 int frame_delay); |
| 46 |
38 media::AudioCapturerSource::CaptureCallback* cb_; | 47 media::AudioCapturerSource::CaptureCallback* cb_; |
39 base::Lock lock_; | 48 base::Lock lock_; |
| 49 |
| 50 media::AudioPushFifo fifo_; |
| 51 const int sample_rate_; |
| 52 |
| 53 // Used to pass the current playout time between DeliverDecodedAudio() and |
| 54 // DeviliverRebufferedAudio(). |
| 55 base::TimeTicks current_playout_time_; |
40 }; | 56 }; |
41 | 57 |
42 #endif // CHROME_RENDERER_MEDIA_CAST_RECEIVER_AUDIO_VALVE_H_ | 58 #endif // CHROME_RENDERER_MEDIA_CAST_RECEIVER_AUDIO_VALVE_H_ |
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