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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 notes: | 5 // Implementation notes: |
6 // | 6 // |
7 // - It is recommended to first acquire the native sample rate of the default | 7 // - It is recommended to first acquire the native sample rate of the default |
8 // output device and then use the same rate when creating this object. | 8 // output device and then use the same rate when creating this object. |
9 // Use AudioManagerMac::HardwareSampleRate() to retrieve the sample rate. | 9 // Use AudioManagerMac::HardwareSampleRate() to retrieve the sample rate. |
10 // - Calling Close() also leads to self destruction. | 10 // - Calling Close() also leads to self destruction. |
11 // - The latency consists of two parts: | 11 // - The latency consists of two parts: |
12 // 1) Hardware latency, which includes Audio Unit latency, audio device | 12 // 1) Hardware latency, which includes Audio Unit latency, audio device |
13 // latency; | 13 // latency; |
14 // 2) The delay between the moment getting the callback and the scheduled time | 14 // 2) The delay between the moment getting the callback and the scheduled time |
15 // stamp that tells when the data is going to be played out. | 15 // stamp that tells when the data is going to be played out. |
16 // | 16 // |
17 #ifndef MEDIA_AUDIO_MAC_AUDIO_AUHAL_MAC_H_ | 17 #ifndef MEDIA_AUDIO_MAC_AUDIO_AUHAL_MAC_H_ |
18 #define MEDIA_AUDIO_MAC_AUDIO_AUHAL_MAC_H_ | 18 #define MEDIA_AUDIO_MAC_AUDIO_AUHAL_MAC_H_ |
19 | 19 |
20 #include <AudioUnit/AudioUnit.h> | 20 #include <AudioUnit/AudioUnit.h> |
21 #include <CoreAudio/CoreAudio.h> | 21 #include <CoreAudio/CoreAudio.h> |
| 22 #include <stddef.h> |
| 23 #include <stdint.h> |
22 | 24 |
23 #include "base/cancelable_callback.h" | 25 #include "base/cancelable_callback.h" |
24 #include "base/compiler_specific.h" | 26 #include "base/compiler_specific.h" |
25 #include "base/macros.h" | 27 #include "base/macros.h" |
26 #include "base/synchronization/lock.h" | 28 #include "base/synchronization/lock.h" |
27 #include "base/threading/thread_checker.h" | 29 #include "base/threading/thread_checker.h" |
28 #include "media/audio/audio_io.h" | 30 #include "media/audio/audio_io.h" |
29 #include "media/audio/audio_parameters.h" | 31 #include "media/audio/audio_parameters.h" |
30 | 32 |
31 namespace media { | 33 namespace media { |
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210 // Used to make sure control functions (Start(), Stop() etc) are called on the | 212 // Used to make sure control functions (Start(), Stop() etc) are called on the |
211 // right thread. | 213 // right thread. |
212 base::ThreadChecker thread_checker_; | 214 base::ThreadChecker thread_checker_; |
213 | 215 |
214 DISALLOW_COPY_AND_ASSIGN(AUHALStream); | 216 DISALLOW_COPY_AND_ASSIGN(AUHALStream); |
215 }; | 217 }; |
216 | 218 |
217 } // namespace media | 219 } // namespace media |
218 | 220 |
219 #endif // MEDIA_AUDIO_MAC_AUDIO_AUHAL_MAC_H_ | 221 #endif // MEDIA_AUDIO_MAC_AUDIO_AUHAL_MAC_H_ |
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