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Side by Side Diff: content/renderer/media/audio_device_thread.h

Issue 9805001: Move media/audio files into media namespace (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 8 years, 8 months ago
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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 CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_THREAD_H_ 5 #ifndef CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_THREAD_H_
6 #define CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_THREAD_H_ 6 #define CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_THREAD_H_
7 #pragma once 7 #pragma once
8 8
9 #include <vector> 9 #include <vector>
10 10
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28 // 28 //
29 // TODO(tommi): Multiple Audio[Input]Device instances should be able to share 29 // TODO(tommi): Multiple Audio[Input]Device instances should be able to share
30 // the same thread instead of spinning one per instance. 30 // the same thread instead of spinning one per instance.
31 class CONTENT_EXPORT AudioDeviceThread { 31 class CONTENT_EXPORT AudioDeviceThread {
32 public: 32 public:
33 // This is the callback interface/base class that Audio[Input]Device 33 // This is the callback interface/base class that Audio[Input]Device
34 // implements to render input/output data. The callback happens on the 34 // implements to render input/output data. The callback happens on the
35 // AudioDevice thread. 35 // AudioDevice thread.
36 class Callback { 36 class Callback {
37 public: 37 public:
38 Callback(const AudioParameters& audio_parameters, 38 Callback(const media::AudioParameters& audio_parameters,
39 base::SharedMemoryHandle memory, 39 base::SharedMemoryHandle memory,
40 int memory_length); 40 int memory_length);
41 virtual ~Callback(); 41 virtual ~Callback();
42 42
43 // One time initialization for the callback object on the audio thread. 43 // One time initialization for the callback object on the audio thread.
44 void InitializeOnAudioThread(); 44 void InitializeOnAudioThread();
45 45
46 // Derived implementations must call shared_memory_.Map appropriately 46 // Derived implementations must call shared_memory_.Map appropriately
47 // before Process can be called. 47 // before Process can be called.
48 virtual void MapSharedMemory() = 0; 48 virtual void MapSharedMemory() = 0;
49 49
50 // Called whenever we receive notifications about pending data. 50 // Called whenever we receive notifications about pending data.
51 virtual void Process(int pending_data) = 0; 51 virtual void Process(int pending_data) = 0;
52 52
53 protected: 53 protected:
54 // Protected so that derived classes can access directly. 54 // Protected so that derived classes can access directly.
55 // The variables are 'const' since values are calculated/set in the 55 // The variables are 'const' since values are calculated/set in the
56 // constructor and must never change. 56 // constructor and must never change.
57 const AudioParameters audio_parameters_; 57 const media::AudioParameters audio_parameters_;
58 const int samples_per_ms_; 58 const int samples_per_ms_;
59 const int bytes_per_ms_; 59 const int bytes_per_ms_;
60 60
61 // Audio buffers that are allocated in InitializeOnAudioThread() based on 61 // Audio buffers that are allocated in InitializeOnAudioThread() based on
62 // info from audio_parameters_. 62 // info from audio_parameters_.
63 std::vector<float*> audio_data_; 63 std::vector<float*> audio_data_;
64 base::SharedMemory shared_memory_; 64 base::SharedMemory shared_memory_;
65 const int memory_length_; 65 const int memory_length_;
66 66
67 private: 67 private:
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100 // reliable initialization. 100 // reliable initialization.
101 class Thread; 101 class Thread;
102 102
103 base::Lock thread_lock_; 103 base::Lock thread_lock_;
104 scoped_refptr<AudioDeviceThread::Thread> thread_; 104 scoped_refptr<AudioDeviceThread::Thread> thread_;
105 105
106 DISALLOW_COPY_AND_ASSIGN(AudioDeviceThread); 106 DISALLOW_COPY_AND_ASSIGN(AudioDeviceThread);
107 }; 107 };
108 108
109 #endif // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_THREAD_H_ 109 #endif // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_THREAD_H_
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