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1 // Copyright 2016 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_RENDERER_SINK_CACHE_H_ | |
6 #define CONTENT_RENDERER_MEDIA_AUDIO_RENDERER_SINK_CACHE_H_ | |
7 | |
8 #include <string> | |
9 | |
10 #include "content/common/content_export.h" | |
11 #include "media/base/output_device_info.h" | |
12 | |
13 namespace url { | |
14 class Origin; | |
15 } | |
16 | |
17 namespace media { | |
18 class AudioRendererSink; | |
19 } | |
20 | |
21 namespace content { | |
22 | |
23 // Caches AudioRendererSink instances, provides them to the clients for usage, | |
24 // tracks their used/unused state, reuses them to obtain output device | |
25 // information, garbage-collects unused sinks. | |
26 // Thread safe. | |
27 class CONTENT_EXPORT AudioRendererSinkCache { | |
28 public: | |
29 virtual ~AudioRendererSinkCache() {} | |
30 | |
31 // Creates default cache, to be used by AudioRendererMixerManager. | |
32 static std::unique_ptr<AudioRendererSinkCache> Create(); | |
33 | |
34 // Returnes output device information for a specified sink. | |
Guido Urdaneta
2016/05/25 13:33:13
typo: s/Returnes/Returns
o1ka
2016/05/25 14:52:11
Done.
| |
35 virtual media::OutputDeviceInfo GetSinkInfo( | |
36 int source_render_frame_id, | |
37 int session_id, | |
38 const std::string& device_id, | |
39 const url::Origin& security_origin) = 0; | |
40 | |
41 // Provides a sink for usage. The sink must be returned to the cache by | |
42 // calling ReleaseSink(). The sink must be stopped by the user before | |
43 // deletion, but after releasing it from the cache. | |
Guido Urdaneta
2016/05/25 13:33:13
How come? Why not stop it before releasing it from
o1ka
2016/05/25 14:52:11
(discussed offline - review comment is obsolete)
| |
44 virtual scoped_refptr<media::AudioRendererSink> GetSink( | |
45 int source_render_frame_id, | |
46 const std::string& device_id, | |
47 const url::Origin& security_origin) = 0; | |
48 | |
49 // Notifies the cache that the sink is not in use any more. Must be | |
50 // called by the client, so that the cache can garbage-collect the sink | |
51 // reference. | |
52 virtual void ReleaseSink(const media::AudioRendererSink* sink_ptr) = 0; | |
53 | |
54 protected: | |
55 AudioRendererSinkCache() {} | |
56 | |
57 DISALLOW_COPY_AND_ASSIGN(AudioRendererSinkCache); | |
58 }; | |
59 | |
60 } // namespace content | |
61 | |
62 #endif // CONTENT_RENDERER_MEDIA_AUDIO_RENDERER_SINK_CACHE_H_ | |
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