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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_AUDIO_AUDIO_INPUT_CONTROLLER_H_ | 5 #ifndef MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_ |
6 #define MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_ | 6 #define MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
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97 | 97 |
98 // Native input stream reports an error. Exact reason differs between | 98 // Native input stream reports an error. Exact reason differs between |
99 // platforms. | 99 // platforms. |
100 STREAM_ERROR, // = 3 | 100 STREAM_ERROR, // = 3 |
101 }; | 101 }; |
102 | 102 |
103 // An event handler that receives events from the AudioInputController. The | 103 // An event handler that receives events from the AudioInputController. The |
104 // following methods are all called on the audio thread. | 104 // following methods are all called on the audio thread. |
105 class MEDIA_EXPORT EventHandler { | 105 class MEDIA_EXPORT EventHandler { |
106 public: | 106 public: |
107 virtual void OnCreated(AudioInputController* controller) = 0; | 107 // The initial "muted" state of the underlying stream is sent along with the |
| 108 // OnCreated callback, to avoid the stream being treated as unmuted until an |
| 109 // OnMuted callback has had time to be processed. |
| 110 virtual void OnCreated(AudioInputController* controller, |
| 111 bool initially_muted) = 0; |
108 virtual void OnError(AudioInputController* controller, | 112 virtual void OnError(AudioInputController* controller, |
109 ErrorCode error_code) = 0; | 113 ErrorCode error_code) = 0; |
110 virtual void OnLog(AudioInputController* controller, | 114 virtual void OnLog(AudioInputController* controller, |
111 const std::string& message) = 0; | 115 const std::string& message) = 0; |
112 // Initially, an AudioInputController is considered not muted. If the | 116 // Called whenever the muted state of the underlying stream changes. |
113 // underlying stream is actually muted, an OnMuted callback will follow | |
114 // shortly after OnCreated. It is also called whenever the muted state of | |
115 // the underlying stream changes. | |
116 virtual void OnMuted(AudioInputController* controller, bool is_muted) = 0; | 117 virtual void OnMuted(AudioInputController* controller, bool is_muted) = 0; |
117 | 118 |
118 protected: | 119 protected: |
119 virtual ~EventHandler() {} | 120 virtual ~EventHandler() {} |
120 }; | 121 }; |
121 | 122 |
122 // A synchronous writer interface used by AudioInputController for | 123 // A synchronous writer interface used by AudioInputController for |
123 // synchronous writing. | 124 // synchronous writing. |
124 class MEDIA_EXPORT SyncWriter { | 125 class MEDIA_EXPORT SyncWriter { |
125 public: | 126 public: |
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406 // The weak_ptr_factory_ and all outstanding weak pointers, are invalidated | 407 // The weak_ptr_factory_ and all outstanding weak pointers, are invalidated |
407 // at the end of DoClose. | 408 // at the end of DoClose. |
408 base::WeakPtrFactory<AudioInputController> weak_ptr_factory_; | 409 base::WeakPtrFactory<AudioInputController> weak_ptr_factory_; |
409 | 410 |
410 DISALLOW_COPY_AND_ASSIGN(AudioInputController); | 411 DISALLOW_COPY_AND_ASSIGN(AudioInputController); |
411 }; | 412 }; |
412 | 413 |
413 } // namespace media | 414 } // namespace media |
414 | 415 |
415 #endif // MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_ | 416 #endif // MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_ |
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