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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 // Audio rendering unit utilizing an AudioRendererSink to output data. | 5 // Audio rendering unit utilizing an AudioRendererSink to output data. |
6 // | 6 // |
7 // This class lives inside three threads during it's lifetime, namely: | 7 // This class lives inside three threads during it's lifetime, namely: |
8 // 1. Render thread | 8 // 1. Render thread |
9 // Where the object is created. | 9 // Where the object is created. |
10 // 2. Media thread (provided via constructor) | 10 // 2. Media thread (provided via constructor) |
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57 public: | 57 public: |
58 // |task_runner| is the thread on which AudioRendererImpl will execute. | 58 // |task_runner| is the thread on which AudioRendererImpl will execute. |
59 // | 59 // |
60 // |sink| is used as the destination for the rendered audio. | 60 // |sink| is used as the destination for the rendered audio. |
61 // | 61 // |
62 // |decoders| contains the AudioDecoders to use when initializing. | 62 // |decoders| contains the AudioDecoders to use when initializing. |
63 AudioRendererImpl( | 63 AudioRendererImpl( |
64 const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, | 64 const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, |
65 AudioRendererSink* sink, | 65 AudioRendererSink* sink, |
66 ScopedVector<AudioDecoder> decoders, | 66 ScopedVector<AudioDecoder> decoders, |
67 const AudioHardwareConfig& hardware_config, | |
68 const scoped_refptr<MediaLog>& media_log); | 67 const scoped_refptr<MediaLog>& media_log); |
69 ~AudioRendererImpl() override; | 68 ~AudioRendererImpl() override; |
70 | 69 |
71 // TimeSource implementation. | 70 // TimeSource implementation. |
72 void StartTicking() override; | 71 void StartTicking() override; |
73 void StopTicking() override; | 72 void StopTicking() override; |
74 void SetPlaybackRate(double rate) override; | 73 void SetPlaybackRate(double rate) override; |
75 void SetMediaTime(base::TimeDelta time) override; | 74 void SetMediaTime(base::TimeDelta time) override; |
76 base::TimeDelta CurrentMediaTime() override; | 75 base::TimeDelta CurrentMediaTime() override; |
77 bool GetWallClockTimes( | 76 bool GetWallClockTimes( |
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203 // Whether or not we expect to handle config changes. | 202 // Whether or not we expect to handle config changes. |
204 bool expecting_config_changes_; | 203 bool expecting_config_changes_; |
205 | 204 |
206 // The sink (destination) for rendered audio. |sink_| must only be accessed | 205 // The sink (destination) for rendered audio. |sink_| must only be accessed |
207 // on |task_runner_|. |sink_| must never be called under |lock_| or else we | 206 // on |task_runner_|. |sink_| must never be called under |lock_| or else we |
208 // may deadlock between |task_runner_| and the audio callback thread. | 207 // may deadlock between |task_runner_| and the audio callback thread. |
209 scoped_refptr<media::AudioRendererSink> sink_; | 208 scoped_refptr<media::AudioRendererSink> sink_; |
210 | 209 |
211 std::unique_ptr<AudioBufferStream> audio_buffer_stream_; | 210 std::unique_ptr<AudioBufferStream> audio_buffer_stream_; |
212 | 211 |
213 // Interface to the hardware audio params. | |
214 const AudioHardwareConfig& hardware_config_; | |
215 | |
216 scoped_refptr<MediaLog> media_log_; | 212 scoped_refptr<MediaLog> media_log_; |
217 | 213 |
218 // Cached copy of hardware params from |hardware_config_|. | 214 // Cached copy of hardware params from |sink_|. |
219 AudioParameters audio_parameters_; | 215 AudioParameters audio_parameters_; |
220 | 216 |
221 RendererClient* client_; | 217 RendererClient* client_; |
222 | 218 |
223 // Callback provided during Initialize(). | 219 // Callback provided during Initialize(). |
224 PipelineStatusCB init_cb_; | 220 PipelineStatusCB init_cb_; |
225 | 221 |
226 // Callback provided to Flush(). | 222 // Callback provided to Flush(). |
227 base::Closure flush_cb_; | 223 base::Closure flush_cb_; |
228 | 224 |
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293 | 289 |
294 // NOTE: Weak pointers must be invalidated before all other member variables. | 290 // NOTE: Weak pointers must be invalidated before all other member variables. |
295 base::WeakPtrFactory<AudioRendererImpl> weak_factory_; | 291 base::WeakPtrFactory<AudioRendererImpl> weak_factory_; |
296 | 292 |
297 DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl); | 293 DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl); |
298 }; | 294 }; |
299 | 295 |
300 } // namespace media | 296 } // namespace media |
301 | 297 |
302 #endif // MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_ | 298 #endif // MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_ |
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