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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2009 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 // MessageFilter that handles audio messages and delegates them to audio | 5 // MessageFilter that handles audio messages and delegates them to audio |
6 // renderers. Created on render thread, AudioMessageFilter is operated on | 6 // renderers. Created on render thread, AudioMessageFilter is operated on |
7 // IO thread (main thread of render process), it intercepts audio messages | 7 // IO thread (main thread of render process), it intercepts audio messages |
8 // and process them on IO thread since these messages are time critical. | 8 // and process them on IO thread since these messages are time critical. |
9 | 9 |
10 #ifndef CHROME_RENDERER_AUDIO_MESSAGE_FILTER_H_ | 10 #ifndef CHROME_RENDERER_AUDIO_MESSAGE_FILTER_H_ |
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25 | 25 |
26 // Called when state of an audio stream has changed in the browser process. | 26 // Called when state of an audio stream has changed in the browser process. |
27 virtual void OnStateChanged(ViewMsg_AudioStreamState state) = 0; | 27 virtual void OnStateChanged(ViewMsg_AudioStreamState state) = 0; |
28 | 28 |
29 // Called when an audio stream has been created in the browser process. | 29 // Called when an audio stream has been created in the browser process. |
30 virtual void OnCreated(base::SharedMemoryHandle handle, size_t length) = 0; | 30 virtual void OnCreated(base::SharedMemoryHandle handle, size_t length) = 0; |
31 | 31 |
32 // Called when notification of stream volume is received from the browser | 32 // Called when notification of stream volume is received from the browser |
33 // process. | 33 // process. |
34 virtual void OnVolume(double left, double right) = 0; | 34 virtual void OnVolume(double left, double right) = 0; |
35 | |
36 protected: | |
37 ~Delegate() {} | |
38 }; | 35 }; |
39 | 36 |
40 AudioMessageFilter(int32 route_id); | 37 AudioMessageFilter(int32 route_id); |
41 ~AudioMessageFilter(); | 38 ~AudioMessageFilter(); |
42 | 39 |
43 // Add a delegate to the map and return id of the entry. | 40 // Add a delegate to the map and return id of the entry. |
44 int32 AddDelegate(Delegate* delegate); | 41 int32 AddDelegate(Delegate* delegate); |
45 | 42 |
46 // Remove a delegate referenced by |id| from the map. | 43 // Remove a delegate referenced by |id| from the map. |
47 void RemoveDelegate(int32 id); | 44 void RemoveDelegate(int32 id); |
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82 IPC::Channel* channel_; | 79 IPC::Channel* channel_; |
83 | 80 |
84 int32 route_id_; | 81 int32 route_id_; |
85 | 82 |
86 MessageLoop* message_loop_; | 83 MessageLoop* message_loop_; |
87 | 84 |
88 DISALLOW_COPY_AND_ASSIGN(AudioMessageFilter); | 85 DISALLOW_COPY_AND_ASSIGN(AudioMessageFilter); |
89 }; | 86 }; |
90 | 87 |
91 #endif // CHROME_RENDERER_AUDIO_MESSAGE_FITLER_H_ | 88 #endif // CHROME_RENDERER_AUDIO_MESSAGE_FITLER_H_ |
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