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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 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 #ifndef MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_ | 5 #ifndef MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_ |
6 #define MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_ | 6 #define MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 #include "base/compiler_specific.h" | 9 #include "base/compiler_specific.h" |
10 #include "base/memory/ref_counted.h" | 10 #include "base/memory/ref_counted.h" |
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25 // AudioOutputProxy uses AudioOutputDispatcher to open and close | 25 // AudioOutputProxy uses AudioOutputDispatcher to open and close |
26 // physical output streams. | 26 // physical output streams. |
27 class MEDIA_EXPORT AudioOutputProxy | 27 class MEDIA_EXPORT AudioOutputProxy |
28 : public AudioOutputStream, | 28 : public AudioOutputStream, |
29 public NON_EXPORTED_BASE(base::NonThreadSafe) { | 29 public NON_EXPORTED_BASE(base::NonThreadSafe) { |
30 public: | 30 public: |
31 // Caller keeps ownership of |dispatcher|. | 31 // Caller keeps ownership of |dispatcher|. |
32 explicit AudioOutputProxy(AudioOutputDispatcher* dispatcher); | 32 explicit AudioOutputProxy(AudioOutputDispatcher* dispatcher); |
33 | 33 |
34 // AudioOutputStream interface. | 34 // AudioOutputStream interface. |
35 virtual bool Open() OVERRIDE; | 35 virtual bool Open() override; |
36 virtual void Start(AudioSourceCallback* callback) OVERRIDE; | 36 virtual void Start(AudioSourceCallback* callback) override; |
37 virtual void Stop() OVERRIDE; | 37 virtual void Stop() override; |
38 virtual void SetVolume(double volume) OVERRIDE; | 38 virtual void SetVolume(double volume) override; |
39 virtual void GetVolume(double* volume) OVERRIDE; | 39 virtual void GetVolume(double* volume) override; |
40 virtual void Close() OVERRIDE; | 40 virtual void Close() override; |
41 | 41 |
42 private: | 42 private: |
43 enum State { | 43 enum State { |
44 kCreated, | 44 kCreated, |
45 kOpened, | 45 kOpened, |
46 kPlaying, | 46 kPlaying, |
47 kClosed, | 47 kClosed, |
48 kOpenError, | 48 kOpenError, |
49 kStartError, | 49 kStartError, |
50 }; | 50 }; |
51 | 51 |
52 virtual ~AudioOutputProxy(); | 52 virtual ~AudioOutputProxy(); |
53 | 53 |
54 scoped_refptr<AudioOutputDispatcher> dispatcher_; | 54 scoped_refptr<AudioOutputDispatcher> dispatcher_; |
55 State state_; | 55 State state_; |
56 | 56 |
57 // Need to save volume here, so that we can restore it in case the stream | 57 // Need to save volume here, so that we can restore it in case the stream |
58 // is stopped, and then started again. | 58 // is stopped, and then started again. |
59 double volume_; | 59 double volume_; |
60 | 60 |
61 DISALLOW_COPY_AND_ASSIGN(AudioOutputProxy); | 61 DISALLOW_COPY_AND_ASSIGN(AudioOutputProxy); |
62 }; | 62 }; |
63 | 63 |
64 } // namespace media | 64 } // namespace media |
65 | 65 |
66 #endif // MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_ | 66 #endif // MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_ |
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