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

Issue 8587009: Add OVERRIDE to content/. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: rebase Created 9 years, 1 month ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 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 // Low-latency audio rendering unit utilizing audio output stream provided 5 // Low-latency audio rendering unit utilizing audio output stream provided
6 // by browser process through IPC. 6 // by browser process through IPC.
7 // 7 //
8 // Relationship of classes. 8 // Relationship of classes.
9 // 9 //
10 // AudioOutputController AudioDevice 10 // AudioOutputController AudioDevice
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99 void GetVolume(double* volume); 99 void GetVolume(double* volume);
100 100
101 double sample_rate() const { return sample_rate_; } 101 double sample_rate() const { return sample_rate_; }
102 size_t buffer_size() const { return buffer_size_; } 102 size_t buffer_size() const { return buffer_size_; }
103 103
104 static double GetAudioHardwareSampleRate(); 104 static double GetAudioHardwareSampleRate();
105 static size_t GetAudioHardwareBufferSize(); 105 static size_t GetAudioHardwareBufferSize();
106 106
107 // Methods called on IO thread ---------------------------------------------- 107 // Methods called on IO thread ----------------------------------------------
108 // AudioMessageFilter::Delegate methods, called by AudioMessageFilter. 108 // AudioMessageFilter::Delegate methods, called by AudioMessageFilter.
109 virtual void OnRequestPacket(AudioBuffersState buffers_state); 109 virtual void OnRequestPacket(AudioBuffersState buffers_state) OVERRIDE;
110 virtual void OnStateChanged(AudioStreamState state); 110 virtual void OnStateChanged(AudioStreamState state) OVERRIDE;
111 virtual void OnCreated(base::SharedMemoryHandle handle, uint32 length); 111 virtual void OnCreated(base::SharedMemoryHandle handle,
112 uint32 length) OVERRIDE;
112 virtual void OnLowLatencyCreated(base::SharedMemoryHandle handle, 113 virtual void OnLowLatencyCreated(base::SharedMemoryHandle handle,
113 base::SyncSocket::Handle socket_handle, 114 base::SyncSocket::Handle socket_handle,
114 uint32 length); 115 uint32 length) OVERRIDE;
115 virtual void OnVolume(double volume); 116 virtual void OnVolume(double volume) OVERRIDE;
116 117
117 private: 118 private:
118 // Methods called on IO thread ---------------------------------------------- 119 // Methods called on IO thread ----------------------------------------------
119 // The following methods are tasks posted on the IO thread that needs to 120 // The following methods are tasks posted on the IO thread that needs to
120 // be executed on that thread. They interact with AudioMessageFilter and 121 // be executed on that thread. They interact with AudioMessageFilter and
121 // sends IPC messages on that thread. 122 // sends IPC messages on that thread.
122 void InitializeOnIOThread(const AudioParameters& params); 123 void InitializeOnIOThread(const AudioParameters& params);
123 void StartOnIOThread(); 124 void StartOnIOThread();
124 void ShutDownOnIOThread(base::WaitableEvent* completion); 125 void ShutDownOnIOThread(base::WaitableEvent* completion);
125 void SetVolumeOnIOThread(double volume); 126 void SetVolumeOnIOThread(double volume);
126 127
127 void Send(IPC::Message* message); 128 void Send(IPC::Message* message);
128 129
129 // Method called on the audio thread (+ one call on the IO thread) ---------- 130 // Method called on the audio thread (+ one call on the IO thread) ----------
130 // Calls the client's callback for rendering audio. There will also be one 131 // Calls the client's callback for rendering audio. There will also be one
131 // initial call on the IO thread before the audio thread has been created. 132 // initial call on the IO thread before the audio thread has been created.
132 void FireRenderCallback(); 133 void FireRenderCallback();
133 134
134 // DelegateSimpleThread::Delegate implementation. 135 // DelegateSimpleThread::Delegate implementation.
135 virtual void Run(); 136 virtual void Run() OVERRIDE;
136 137
137 // Format 138 // Format
138 size_t buffer_size_; // in sample-frames 139 size_t buffer_size_; // in sample-frames
139 int channels_; 140 int channels_;
140 int bits_per_sample_; 141 int bits_per_sample_;
141 double sample_rate_; 142 double sample_rate_;
142 143
143 RenderCallback* callback_; 144 RenderCallback* callback_;
144 145
145 // The client callback renders audio into here. 146 // The client callback renders audio into here.
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169 170
170 // Data transfer between browser and render process uses a combination 171 // Data transfer between browser and render process uses a combination
171 // of sync sockets and shared memory to provide lowest possible latency. 172 // of sync sockets and shared memory to provide lowest possible latency.
172 scoped_ptr<base::SharedMemory> shared_memory_; 173 scoped_ptr<base::SharedMemory> shared_memory_;
173 scoped_ptr<base::SyncSocket> socket_; 174 scoped_ptr<base::SyncSocket> socket_;
174 175
175 DISALLOW_IMPLICIT_CONSTRUCTORS(AudioDevice); 176 DISALLOW_IMPLICIT_CONSTRUCTORS(AudioDevice);
176 }; 177 };
177 178
178 #endif // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_H_ 179 #endif // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_H_
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