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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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