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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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71 // wedge is detected all streams across all dispatchers must be closed. After | 71 // wedge is detected all streams across all dispatchers must be closed. After |
72 // all streams are closed, streams are restarted. See http://crbug.com/160920 | 72 // all streams are closed, streams are restarted. See http://crbug.com/160920 |
73 virtual void CloseStreamsForWedgeFix() = 0; | 73 virtual void CloseStreamsForWedgeFix() = 0; |
74 virtual void RestartStreamsForWedgeFix() = 0; | 74 virtual void RestartStreamsForWedgeFix() = 0; |
75 | 75 |
76 // Accessor to the input device id used by unified IO. | 76 // Accessor to the input device id used by unified IO. |
77 const std::string& input_device_id() const { return input_device_id_; } | 77 const std::string& input_device_id() const { return input_device_id_; } |
78 | 78 |
79 protected: | 79 protected: |
80 friend class base::RefCountedThreadSafe<AudioOutputDispatcher>; | 80 friend class base::RefCountedThreadSafe<AudioOutputDispatcher>; |
81 friend class AudioOutputProxyTest; | |
82 | |
83 virtual ~AudioOutputDispatcher(); | 81 virtual ~AudioOutputDispatcher(); |
84 | 82 |
85 // A no-reference-held pointer (we don't want circular references) back to the | 83 // A no-reference-held pointer (we don't want circular references) back to the |
86 // AudioManager that owns this object. | 84 // AudioManager that owns this object. |
87 AudioManager* audio_manager_; | 85 AudioManager* audio_manager_; |
88 const scoped_refptr<base::MessageLoopProxy> message_loop_; | 86 const scoped_refptr<base::MessageLoopProxy> message_loop_; |
89 const AudioParameters params_; | 87 const AudioParameters params_; |
90 std::string output_device_id_; | 88 std::string output_device_id_; |
91 const std::string input_device_id_; | 89 const std::string input_device_id_; |
92 | 90 |
93 private: | 91 private: |
94 DISALLOW_COPY_AND_ASSIGN(AudioOutputDispatcher); | 92 DISALLOW_COPY_AND_ASSIGN(AudioOutputDispatcher); |
95 }; | 93 }; |
96 | 94 |
97 } // namespace media | 95 } // namespace media |
98 | 96 |
99 #endif // MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_ | 97 #endif // MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_ |
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