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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 // AudioOutputDispatcher is a single-threaded base class that dispatches | 5 // AudioOutputDispatcher is a single-threaded base class that dispatches |
6 // creation and deletion of audio output streams. AudioOutputProxy objects use | 6 // creation and deletion of audio output streams. AudioOutputProxy objects use |
7 // this class to allocate and recycle actual audio output streams. When playback | 7 // this class to allocate and recycle actual audio output streams. When playback |
8 // is started, the proxy calls StartStream() to get an output stream that it | 8 // is started, the proxy calls StartStream() to get an output stream that it |
9 // uses to play audio. When playback is stopped, the proxy returns the stream | 9 // uses to play audio. When playback is stopped, the proxy returns the stream |
10 // back to the dispatcher by calling StopStream(). | 10 // back to the dispatcher by calling StopStream(). |
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64 virtual void CloseStream(AudioOutputProxy* stream_proxy) = 0; | 64 virtual void CloseStream(AudioOutputProxy* stream_proxy) = 0; |
65 | 65 |
66 // Called on the audio thread when the AudioManager is shutting down. | 66 // Called on the audio thread when the AudioManager is shutting down. |
67 virtual void Shutdown() = 0; | 67 virtual void Shutdown() = 0; |
68 | 68 |
69 // Accessor to the input device id used by unified IO. | 69 // Accessor to the input device id used by unified IO. |
70 const std::string& input_device_id() const { return input_device_id_; } | 70 const std::string& input_device_id() const { return input_device_id_; } |
71 | 71 |
72 protected: | 72 protected: |
73 friend class base::RefCountedThreadSafe<AudioOutputDispatcher>; | 73 friend class base::RefCountedThreadSafe<AudioOutputDispatcher>; |
| 74 friend class AudioOutputProxyTest; |
| 75 |
74 virtual ~AudioOutputDispatcher(); | 76 virtual ~AudioOutputDispatcher(); |
75 | 77 |
76 // A no-reference-held pointer (we don't want circular references) back to the | 78 // A no-reference-held pointer (we don't want circular references) back to the |
77 // AudioManager that owns this object. | 79 // AudioManager that owns this object. |
78 AudioManager* audio_manager_; | 80 AudioManager* audio_manager_; |
79 const scoped_refptr<base::MessageLoopProxy> message_loop_; | 81 const scoped_refptr<base::MessageLoopProxy> message_loop_; |
80 const AudioParameters params_; | 82 const AudioParameters params_; |
81 const std::string output_device_id_; | 83 const std::string output_device_id_; |
82 const std::string input_device_id_; | 84 const std::string input_device_id_; |
83 | 85 |
84 private: | 86 private: |
85 DISALLOW_COPY_AND_ASSIGN(AudioOutputDispatcher); | 87 DISALLOW_COPY_AND_ASSIGN(AudioOutputDispatcher); |
86 }; | 88 }; |
87 | 89 |
88 } // namespace media | 90 } // namespace media |
89 | 91 |
90 #endif // MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_ | 92 #endif // MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_ |
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