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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_DEVICE_THREAD_H_ | 5 #ifndef MEDIA_AUDIO_AUDIO_DEVICE_THREAD_H_ |
6 #define MEDIA_AUDIO_AUDIO_DEVICE_THREAD_H_ | 6 #define MEDIA_AUDIO_AUDIO_DEVICE_THREAD_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 #include "base/memory/ref_counted.h" | 9 #include "base/memory/ref_counted.h" |
10 #include "base/memory/scoped_ptr.h" | 10 #include "base/memory/scoped_ptr.h" |
11 #include "base/memory/shared_memory.h" | 11 #include "base/memory/shared_memory.h" |
12 #include "base/sync_socket.h" | 12 #include "base/sync_socket.h" |
13 #include "base/synchronization/lock.h" | 13 #include "base/synchronization/lock.h" |
14 #include "media/audio/audio_parameters.h" | 14 #include "media/audio/audio_parameters.h" |
15 #include "media/audio/shared_memory_util.h" | |
16 #include "media/base/media_export.h" | 15 #include "media/base/media_export.h" |
17 | 16 |
18 namespace base { | 17 namespace base { |
19 class MessageLoop; | 18 class MessageLoop; |
20 } | 19 } |
21 | 20 |
22 namespace media { | 21 namespace media { |
23 class AudioBus; | 22 class AudioBus; |
24 | 23 |
25 // Data transfer between browser and render process uses a combination | 24 // Data transfer between browser and render process uses a combination |
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67 const int total_segments_; | 66 const int total_segments_; |
68 int segment_length_; | 67 int segment_length_; |
69 | 68 |
70 private: | 69 private: |
71 DISALLOW_COPY_AND_ASSIGN(Callback); | 70 DISALLOW_COPY_AND_ASSIGN(Callback); |
72 }; | 71 }; |
73 | 72 |
74 AudioDeviceThread(); | 73 AudioDeviceThread(); |
75 ~AudioDeviceThread(); | 74 ~AudioDeviceThread(); |
76 | 75 |
77 // Starts the audio thread. The thread must not already be running. | 76 // Starts the audio thread. The thread must not already be running. If |
| 77 // |sychronized_buffers| is set, the browser expects to be notified via the |
| 78 // |socket| every time AudioDeviceThread::Process() completes. |
78 void Start(AudioDeviceThread::Callback* callback, | 79 void Start(AudioDeviceThread::Callback* callback, |
79 base::SyncSocket::Handle socket, | 80 base::SyncSocket::Handle socket, |
80 const char* thread_name); | 81 const char* thread_name, |
| 82 bool synchronized_buffers); |
81 | 83 |
82 // This tells the audio thread to stop and clean up the data. | 84 // This tells the audio thread to stop and clean up the data. |
83 // The method can stop the thread synchronously or asynchronously. | 85 // The method can stop the thread synchronously or asynchronously. |
84 // In the latter case, the thread will still be running after Stop() | 86 // In the latter case, the thread will still be running after Stop() |
85 // returns, but the callback pointer is cleared so no further callbacks will | 87 // returns, but the callback pointer is cleared so no further callbacks will |
86 // be made (IOW after Stop() returns, it is safe to delete the callback). | 88 // be made (IOW after Stop() returns, it is safe to delete the callback). |
87 // The |loop_for_join| parameter is required for asynchronous operation | 89 // The |loop_for_join| parameter is required for asynchronous operation |
88 // in order to join the worker thread and close the thread handle later via a | 90 // in order to join the worker thread and close the thread handle later via a |
89 // posted task. | 91 // posted task. |
90 // If set to NULL, function will wait for the thread to exit before returning. | 92 // If set to NULL, function will wait for the thread to exit before returning. |
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105 | 107 |
106 base::Lock thread_lock_; | 108 base::Lock thread_lock_; |
107 scoped_refptr<AudioDeviceThread::Thread> thread_; | 109 scoped_refptr<AudioDeviceThread::Thread> thread_; |
108 | 110 |
109 DISALLOW_COPY_AND_ASSIGN(AudioDeviceThread); | 111 DISALLOW_COPY_AND_ASSIGN(AudioDeviceThread); |
110 }; | 112 }; |
111 | 113 |
112 } // namespace media. | 114 } // namespace media. |
113 | 115 |
114 #endif // MEDIA_AUDIO_AUDIO_DEVICE_THREAD_H_ | 116 #endif // MEDIA_AUDIO_AUDIO_DEVICE_THREAD_H_ |
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