| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_RENDERER_MEDIA_CAST_RECEIVER_AUDIO_VALVE_H_ |
| #define CHROME_RENDERER_MEDIA_CAST_RECEIVER_AUDIO_VALVE_H_ |
| |
| #include "base/synchronization/lock.h" |
| #include "base/time/time.h" |
| #include "media/base/audio_capturer_source.h" |
| #include "media/base/audio_push_fifo.h" |
| |
| namespace media { |
| class AudioBus; |
| } |
| |
| // Forwards calls to |cb| until Stop is called. If the client requested a |
| // different buffer size than that provided by the Cast Receiver, AudioPushFifo |
| // is used to rectify that. |
| // |
| // Thread-safe. |
| // All functions may block depending on contention. |
| class CastReceiverAudioValve : |
| public base::RefCountedThreadSafe<CastReceiverAudioValve> { |
| public: |
| CastReceiverAudioValve(const media::AudioParameters& params, |
| media::AudioCapturerSource::CaptureCallback* cb); |
| |
| // Called on an unknown thread to provide more decoded audio data from the |
| // Cast Receiver. |
| void DeliverDecodedAudio(const media::AudioBus* audio_bus, |
| base::TimeTicks playout_time); |
| |
| // When this returns, no more calls will be forwarded to |cb|. |
| void Stop(); |
| |
| private: |
| friend class base::RefCountedThreadSafe<CastReceiverAudioValve>; |
| |
| ~CastReceiverAudioValve(); |
| |
| // Called by AudioPushFifo zero or more times during the call to Capture(). |
| // Delivers audio data in the required buffer size to |cb_|. |
| void DeliverRebufferedAudio(const media::AudioBus& audio_bus, |
| int frame_delay); |
| |
| media::AudioCapturerSource::CaptureCallback* cb_; |
| base::Lock lock_; |
| |
| media::AudioPushFifo fifo_; |
| const int sample_rate_; |
| |
| // Used to pass the current playout time between DeliverDecodedAudio() and |
| // DeviliverRebufferedAudio(). |
| base::TimeTicks current_playout_time_; |
| }; |
| |
| #endif // CHROME_RENDERER_MEDIA_CAST_RECEIVER_AUDIO_VALVE_H_ |