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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 MEDIA_BASE_AUDIO_RENDERER_H_ | 5 #ifndef MEDIA_BASE_AUDIO_RENDERER_H_ |
| 6 #define MEDIA_BASE_AUDIO_RENDERER_H_ | 6 #define MEDIA_BASE_AUDIO_RENDERER_H_ |
| 7 | 7 |
| 8 #include "base/callback.h" | 8 #include "base/callback.h" |
| 9 #include "base/memory/ref_counted.h" | 9 #include "base/memory/ref_counted.h" |
| 10 #include "base/time.h" | 10 #include "base/time.h" |
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| 65 virtual void Preroll(base::TimeDelta time, | 65 virtual void Preroll(base::TimeDelta time, |
| 66 const PipelineStatusCB& callback) = 0; | 66 const PipelineStatusCB& callback) = 0; |
| 67 | 67 |
| 68 // Stop all operations in preparation for being deleted, executing |callback| | 68 // Stop all operations in preparation for being deleted, executing |callback| |
| 69 // when complete. | 69 // when complete. |
| 70 virtual void Stop(const base::Closure& callback) = 0; | 70 virtual void Stop(const base::Closure& callback) = 0; |
| 71 | 71 |
| 72 // Updates the current playback rate. | 72 // Updates the current playback rate. |
| 73 virtual void SetPlaybackRate(float playback_rate) = 0; | 73 virtual void SetPlaybackRate(float playback_rate) = 0; |
| 74 | 74 |
| 75 // Returns true if all audio data has been played back by the audio device. | |
| 76 virtual bool HasEnded() = 0; | |
| 77 | |
| 78 // Sets the output volume. | 75 // Sets the output volume. |
| 79 virtual void SetVolume(float volume) = 0; | 76 virtual void SetVolume(float volume) = 0; |
| 80 | 77 |
| 81 // Resumes playback after underflow occurs. | 78 // Resumes playback after underflow occurs. |
| 82 // | 79 // |
| 83 // |buffer_more_audio| is set to true if you want to increase the size of the | 80 // |buffer_more_audio| is set to true if you want to increase the size of the |
| 84 // decoded audio buffer. | 81 // decoded audio buffer. |
| 85 virtual void ResumeAfterUnderflow(bool buffer_more_audio) = 0; | 82 virtual void ResumeAfterUnderflow(bool buffer_more_audio) = 0; |
| 86 | 83 |
| 87 protected: | 84 protected: |
| 88 friend class base::RefCountedThreadSafe<AudioRenderer>; | 85 friend class base::RefCountedThreadSafe<AudioRenderer>; |
| 89 | 86 |
| 90 AudioRenderer(); | 87 AudioRenderer(); |
| 91 virtual ~AudioRenderer(); | 88 virtual ~AudioRenderer(); |
| 92 | 89 |
| 93 private: | 90 private: |
| 94 DISALLOW_COPY_AND_ASSIGN(AudioRenderer); | 91 DISALLOW_COPY_AND_ASSIGN(AudioRenderer); |
| 95 }; | 92 }; |
| 96 | 93 |
| 97 } // namespace media | 94 } // namespace media |
| 98 | 95 |
| 99 #endif // MEDIA_BASE_AUDIO_RENDERER_H_ | 96 #endif // MEDIA_BASE_AUDIO_RENDERER_H_ |
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