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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 // Implementation of AudioInputStream for Mac OS X using the special AUHAL | 5 // Implementation of AudioInputStream for Mac OS X using the special AUHAL |
6 // input Audio Unit present in OS 10.4 and later. | 6 // input Audio Unit present in OS 10.4 and later. |
7 // The AUHAL input Audio Unit is for low-latency audio I/O. | 7 // The AUHAL input Audio Unit is for low-latency audio I/O. |
8 // | 8 // |
9 // Overview of operation: | 9 // Overview of operation: |
10 // | 10 // |
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31 // 1) Hardware latency, which includes Audio Unit latency, audio device | 31 // 1) Hardware latency, which includes Audio Unit latency, audio device |
32 // latency; | 32 // latency; |
33 // 2) The delay between the actual recording instant and the time when the | 33 // 2) The delay between the actual recording instant and the time when the |
34 // data packet is provided as a callback. | 34 // data packet is provided as a callback. |
35 // | 35 // |
36 #ifndef MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_ | 36 #ifndef MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_ |
37 #define MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_ | 37 #define MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_ |
38 | 38 |
39 #include <AudioUnit/AudioUnit.h> | 39 #include <AudioUnit/AudioUnit.h> |
40 #include <CoreAudio/CoreAudio.h> | 40 #include <CoreAudio/CoreAudio.h> |
| 41 #include <stddef.h> |
| 42 #include <stdint.h> |
41 | 43 |
42 #include "base/atomicops.h" | 44 #include "base/atomicops.h" |
43 #include "base/cancelable_callback.h" | 45 #include "base/cancelable_callback.h" |
44 #include "base/macros.h" | 46 #include "base/macros.h" |
45 #include "base/memory/scoped_ptr.h" | 47 #include "base/memory/scoped_ptr.h" |
46 #include "base/synchronization/lock.h" | 48 #include "base/synchronization/lock.h" |
47 #include "base/threading/thread_checker.h" | 49 #include "base/threading/thread_checker.h" |
48 #include "base/time/time.h" | 50 #include "base/time/time.h" |
49 #include "base/timer/timer.h" | 51 #include "base/timer/timer.h" |
50 #include "media/audio/agc_audio_stream.h" | 52 #include "media/audio/agc_audio_stream.h" |
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203 // Set to true if the audio unit's IO buffer was changed when Open() was | 205 // Set to true if the audio unit's IO buffer was changed when Open() was |
204 // called. | 206 // called. |
205 bool buffer_size_was_changed_; | 207 bool buffer_size_was_changed_; |
206 | 208 |
207 DISALLOW_COPY_AND_ASSIGN(AUAudioInputStream); | 209 DISALLOW_COPY_AND_ASSIGN(AUAudioInputStream); |
208 }; | 210 }; |
209 | 211 |
210 } // namespace media | 212 } // namespace media |
211 | 213 |
212 #endif // MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_ | 214 #endif // MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_ |
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