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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_ | |
6 #define CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_ | |
7 #pragma once | |
8 | |
9 #include "base/basictypes.h" | |
10 #include "content/common/content_export.h" | |
11 | |
12 namespace media { | |
13 class AudioRendererSink; | |
14 } | |
15 | |
scherkus (not reviewing)
2012/06/26 23:34:30
new content code (and existing code if you're touc
henrika (OOO until Aug 14)
2012/06/27 08:23:16
Thanks. Will fix.
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16 // A factory for creating AudioRendererSinks. There is a global factory | |
17 // function that can be installed for the purposes of testing to provide | |
18 // a specialized AudioRendererSink class. | |
19 // This class uses the same pattern as content::RenderViewHostFactory. | |
20 class AudioDeviceFactory { | |
21 public: | |
22 // Creates an AudioRendererSink using the currently registered factory, | |
23 // or the default one if no factory is registered. Ownership of the returned | |
24 // pointer will be passed to the caller. | |
25 static media::AudioRendererSink* Create(); | |
26 | |
27 // Returns true if there is currently a globally-registered factory. | |
28 static bool has_factory() { | |
29 return !!factory_; | |
30 } | |
31 | |
32 protected: | |
33 AudioDeviceFactory() {} | |
34 virtual ~AudioDeviceFactory() {} | |
35 | |
36 // You can derive from this class and specify an implementation for this | |
37 // function to create a different kind of AudioRendererSink for testing. | |
38 virtual media::AudioRendererSink* CreateAudioDevice() = 0; | |
39 | |
40 // Registers your factory to be called when new AudioRendererSinks are | |
41 // created. We have only one global factory, so there must be no factory | |
42 // registered before the call. This class does NOT take ownership of the | |
43 // pointer. | |
44 CONTENT_EXPORT static void RegisterFactory(AudioDeviceFactory* factory); | |
45 | |
46 // Unregister the previously registered factory. With no factory registered, | |
47 // the default AudioRendererSinks will be created. | |
48 CONTENT_EXPORT static void UnregisterFactory(); | |
49 | |
50 private: | |
51 // The current globally registered factory. This is NULL when we should | |
52 // create the default AudioRendererSinks. | |
53 CONTENT_EXPORT static AudioDeviceFactory* factory_; | |
54 | |
55 DISALLOW_COPY_AND_ASSIGN(AudioDeviceFactory); | |
56 }; | |
57 | |
58 #endif // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_ | |
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