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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 | |
16 namespace content { | |
17 | |
18 // A factory for creating AudioRendererSinks. There is a global factory | |
19 // function that can be installed for the purposes of testing to provide | |
20 // a specialized AudioRendererSink class. | |
21 // This class uses the same pattern as content::RenderViewHostFactory. | |
22 class AudioDeviceFactory { | |
jam
2012/06/27 15:56:29
nit: it's a bit odd that this factory creates the
henrika (OOO until Aug 14)
2012/06/27 17:54:47
It's a very good comment. I will improve it. Thank
| |
23 public: | |
24 // Creates an AudioRendererSink using the currently registered factory, | |
25 // or the default one if no factory is registered. Ownership of the returned | |
26 // pointer will be passed to the caller. | |
27 CONTENT_EXPORT static media::AudioRendererSink* Create(); | |
28 | |
29 // Returns true if there is currently a globally-registered factory. | |
30 CONTENT_EXPORT static bool has_factory() { | |
jam
2012/06/27 15:56:29
this isn't used, so take it out
henrika (OOO until Aug 14)
2012/06/27 17:54:47
Will do.
henrika (OOO until Aug 14)
2012/06/28 11:36:01
Done.
| |
31 return !!factory_; | |
32 } | |
33 | |
34 protected: | |
35 AudioDeviceFactory() {} | |
36 virtual ~AudioDeviceFactory() {} | |
37 | |
38 // You can derive from this class and specify an implementation for this | |
39 // function to create a different kind of AudioRendererSink for testing. | |
40 virtual media::AudioRendererSink* CreateAudioDevice() = 0; | |
41 | |
42 // Registers your factory to be called when new AudioRendererSinks are | |
43 // created. We have only one global factory, so there must be no factory | |
44 // registered before the call. This class does NOT take ownership of the | |
45 // pointer. | |
46 CONTENT_EXPORT static void RegisterFactory(AudioDeviceFactory* factory); | |
47 | |
48 // Unregister the previously registered factory. With no factory registered, | |
49 // the default AudioRendererSinks will be created. | |
50 CONTENT_EXPORT static void UnregisterFactory(); | |
jam
2012/06/27 15:56:29
nit: you can get rid of the Register and Unregiste
henrika (OOO until Aug 14)
2012/06/27 17:54:47
That's a smart observation. Note, also applies to
henrika (OOO until Aug 14)
2012/06/28 11:36:01
Done.
| |
51 | |
52 private: | |
53 // The current globally registered factory. This is NULL when we should | |
54 // create the default AudioRendererSinks. | |
55 CONTENT_EXPORT static AudioDeviceFactory* factory_; | |
jam
2012/06/27 15:56:29
don't need CONTENT_EXPORT here
henrika (OOO until Aug 14)
2012/06/27 17:54:47
Will do.
henrika (OOO until Aug 14)
2012/06/28 11:36:01
Done.
| |
56 | |
57 DISALLOW_COPY_AND_ASSIGN(AudioDeviceFactory); | |
58 }; | |
59 | |
60 } // namespace content | |
61 | |
62 #endif // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_ | |
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