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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 audio output stream provided by browser | 5 // Audio rendering unit utilizing audio output stream provided by browser |
6 // process through IPC. | 6 // process through IPC. |
7 // | 7 // |
8 // Relationship of classes. | 8 // Relationship of classes. |
9 // | 9 // |
10 // AudioOutputController AudioDevice | 10 // AudioOutputController AudioDevice |
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79 class CONTENT_EXPORT AudioDevice | 79 class CONTENT_EXPORT AudioDevice |
80 : NON_EXPORTED_BASE(public media::AudioRendererSink), | 80 : NON_EXPORTED_BASE(public media::AudioRendererSink), |
81 public AudioMessageFilter::Delegate, | 81 public AudioMessageFilter::Delegate, |
82 NON_EXPORTED_BASE(public ScopedLoopObserver) { | 82 NON_EXPORTED_BASE(public ScopedLoopObserver) { |
83 public: | 83 public: |
84 // Methods called on main render thread ------------------------------------- | 84 // Methods called on main render thread ------------------------------------- |
85 | 85 |
86 // Minimal constructor where Initialize() must be called later. | 86 // Minimal constructor where Initialize() must be called later. |
87 AudioDevice(); | 87 AudioDevice(); |
88 | 88 |
89 AudioDevice(size_t buffer_size, | 89 AudioDevice(const AudioParameters& params, RenderCallback* callback); |
90 int channels, | |
91 double sample_rate, | |
92 RenderCallback* callback); | |
93 | 90 |
94 // AudioRendererSink implementation. | 91 // AudioRendererSink implementation. |
95 | 92 |
96 virtual void Initialize(size_t buffer_size, | 93 virtual void Initialize(const AudioParameters& params, |
97 int channels, | |
98 double sample_rate, | |
99 AudioParameters::Format latency_format, | |
100 RenderCallback* callback) OVERRIDE; | 94 RenderCallback* callback) OVERRIDE; |
101 // Starts audio playback. | 95 // Starts audio playback. |
102 virtual void Start() OVERRIDE; | 96 virtual void Start() OVERRIDE; |
103 | 97 |
104 // Stops audio playback. | 98 // Stops audio playback. |
105 virtual void Stop() OVERRIDE; | 99 virtual void Stop() OVERRIDE; |
106 | 100 |
107 // Resumes playback if currently paused. | 101 // Resumes playback if currently paused. |
108 virtual void Play() OVERRIDE; | 102 virtual void Play() OVERRIDE; |
109 | 103 |
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180 // guard to control stopping and starting the audio thread. | 174 // guard to control stopping and starting the audio thread. |
181 base::Lock audio_thread_lock_; | 175 base::Lock audio_thread_lock_; |
182 AudioDeviceThread audio_thread_; | 176 AudioDeviceThread audio_thread_; |
183 scoped_ptr<AudioDevice::AudioThreadCallback> audio_callback_; | 177 scoped_ptr<AudioDevice::AudioThreadCallback> audio_callback_; |
184 | 178 |
185 | 179 |
186 DISALLOW_COPY_AND_ASSIGN(AudioDevice); | 180 DISALLOW_COPY_AND_ASSIGN(AudioDevice); |
187 }; | 181 }; |
188 | 182 |
189 #endif // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_H_ | 183 #endif // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_H_ |
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