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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 <string> | 8 #include <string> |
| 9 #include "base/atomicops.h" | 9 #include "base/atomicops.h" |
| 10 #include "base/callback.h" | 10 #include "base/callback.h" |
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| 223 EventHandler* handler_; | 223 EventHandler* handler_; |
| 224 | 224 |
| 225 // Pointer to the audio input stream object. | 225 // Pointer to the audio input stream object. |
| 226 AudioInputStream* stream_; | 226 AudioInputStream* stream_; |
| 227 | 227 |
| 228 // |no_data_timer_| is used to call OnError() when we stop receiving | 228 // |no_data_timer_| is used to call OnError() when we stop receiving |
| 229 // OnData() calls without an OnClose() call. This can occur | 229 // OnData() calls without an OnClose() call. This can occur |
| 230 // when an audio input device is unplugged whilst recording on Windows. | 230 // when an audio input device is unplugged whilst recording on Windows. |
| 231 // See http://crbug.com/79936 for details. | 231 // See http://crbug.com/79936 for details. |
| 232 // This member is only touched by the audio thread. | 232 // This member is only touched by the audio thread. |
| 233 scoped_ptr<base::DelayTimer<AudioInputController> > no_data_timer_; | 233 scoped_ptr<base::Timer> no_data_timer_; |
| 234 | 234 |
| 235 // This flag is used to signal that we are receiving OnData() calls, i.e, | 235 // This flag is used to signal that we are receiving OnData() calls, i.e, |
| 236 // that data is active. It can be touched by the audio thread and by the | 236 // that data is active. It can be touched by the audio thread and by the |
| 237 // low-level audio thread which calls OnData(). E.g. on Windows, the | 237 // low-level audio thread which calls OnData(). E.g. on Windows, the |
| 238 // low-level audio thread is called wasapi_capture_thread. | 238 // low-level audio thread is called wasapi_capture_thread. |
| 239 base::subtle::Atomic32 data_is_active_; | 239 base::subtle::Atomic32 data_is_active_; |
| 240 | 240 |
| 241 // |state_| is written on the audio thread and is read on the hardware audio | 241 // |state_| is written on the audio thread and is read on the hardware audio |
| 242 // thread. These operations need to be locked. But lock is not required for | 242 // thread. These operations need to be locked. But lock is not required for |
| 243 // reading on the audio input controller thread. | 243 // reading on the audio input controller thread. |
| 244 State state_; | 244 State state_; |
| 245 | 245 |
| 246 base::Lock lock_; | 246 base::Lock lock_; |
| 247 | 247 |
| 248 // SyncWriter is used only in low-latency mode for synchronous writing. | 248 // SyncWriter is used only in low-latency mode for synchronous writing. |
| 249 SyncWriter* sync_writer_; | 249 SyncWriter* sync_writer_; |
| 250 | 250 |
| 251 static Factory* factory_; | 251 static Factory* factory_; |
| 252 | 252 |
| 253 double max_volume_; | 253 double max_volume_; |
| 254 | 254 |
| 255 DISALLOW_COPY_AND_ASSIGN(AudioInputController); | 255 DISALLOW_COPY_AND_ASSIGN(AudioInputController); |
| 256 }; | 256 }; |
| 257 | 257 |
| 258 } // namespace media | 258 } // namespace media |
| 259 | 259 |
| 260 #endif // MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_ | 260 #endif // MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_ |
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