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Side by Side Diff: media/audio/audio_manager.h

Issue 9805001: Move media/audio files into media namespace (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 8 years, 8 months ago
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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_MANAGER_H_ 5 #ifndef MEDIA_AUDIO_AUDIO_MANAGER_H_
6 #define MEDIA_AUDIO_AUDIO_MANAGER_H_ 6 #define MEDIA_AUDIO_AUDIO_MANAGER_H_
7 7
8 #include <string> 8 #include <string>
9 9
10 #include "base/basictypes.h" 10 #include "base/basictypes.h"
11 #include "base/memory/ref_counted.h" 11 #include "base/memory/ref_counted.h"
12 #include "base/string16.h" 12 #include "base/string16.h"
13 #include "media/audio/audio_device_name.h" 13 #include "media/audio/audio_device_name.h"
14 #include "media/audio/audio_parameters.h" 14 #include "media/audio/audio_parameters.h"
15 15
16 class AudioInputStream;
17 class AudioOutputStream;
18 class MessageLoop; 16 class MessageLoop;
17
19 namespace base { 18 namespace base {
20 class MessageLoopProxy; 19 class MessageLoopProxy;
21 } 20 }
22 21
22 namespace media {
23
24 class AudioInputStream;
25 class AudioOutputStream;
26
23 // Manages all audio resources. In particular it owns the AudioOutputStream 27 // Manages all audio resources. In particular it owns the AudioOutputStream
24 // objects. Provides some convenience functions that avoid the need to provide 28 // objects. Provides some convenience functions that avoid the need to provide
25 // iterators over the existing streams. 29 // iterators over the existing streams.
26 class MEDIA_EXPORT AudioManager { 30 class MEDIA_EXPORT AudioManager {
27 public: 31 public:
28 virtual ~AudioManager(); 32 virtual ~AudioManager();
29 33
30 // Use to construct the audio manager. 34 // Use to construct the audio manager.
31 // NOTE: There should only be one instance. 35 // NOTE: There should only be one instance.
32 static AudioManager* Create(); 36 static AudioManager* Create();
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50 54
51 // Opens the platform default audio input settings UI. 55 // Opens the platform default audio input settings UI.
52 // Note: This could invoke an external application/preferences pane, so 56 // Note: This could invoke an external application/preferences pane, so
53 // ideally must not be called from the UI thread or other time sensitive 57 // ideally must not be called from the UI thread or other time sensitive
54 // threads to avoid blocking the rest of the application. 58 // threads to avoid blocking the rest of the application.
55 virtual void ShowAudioInputSettings() = 0; 59 virtual void ShowAudioInputSettings() = 0;
56 60
57 // Appends a list of available input devices. It is not guaranteed that 61 // Appends a list of available input devices. It is not guaranteed that
58 // all the devices in the list support all formats and sample rates for 62 // all the devices in the list support all formats and sample rates for
59 // recording. 63 // recording.
60 virtual void GetAudioInputDeviceNames( 64 virtual void GetAudioInputDeviceNames(AudioDeviceNames* device_names) = 0;
61 media::AudioDeviceNames* device_names) = 0;
62 65
63 // Factory for all the supported stream formats. |params| defines parameters 66 // Factory for all the supported stream formats. |params| defines parameters
64 // of the audio stream to be created. 67 // of the audio stream to be created.
65 // 68 //
66 // |params.sample_per_packet| is the requested buffer allocation which the 69 // |params.sample_per_packet| is the requested buffer allocation which the
67 // audio source thinks it can usually fill without blocking. Internally two 70 // audio source thinks it can usually fill without blocking. Internally two
68 // or three buffers are created, one will be locked for playback and one will 71 // or three buffers are created, one will be locked for playback and one will
69 // be ready to be filled in the call to AudioSourceCallback::OnMoreData(). 72 // be ready to be filled in the call to AudioSourceCallback::OnMoreData().
70 // 73 //
71 // Returns NULL if the combination of the parameters is not supported, or if 74 // Returns NULL if the combination of the parameters is not supported, or if
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117 protected: 120 protected:
118 AudioManager(); 121 AudioManager();
119 122
120 // Called from Create() to initialize the instance. 123 // Called from Create() to initialize the instance.
121 virtual void Init() = 0; 124 virtual void Init() = 0;
122 125
123 private: 126 private:
124 DISALLOW_COPY_AND_ASSIGN(AudioManager); 127 DISALLOW_COPY_AND_ASSIGN(AudioManager);
125 }; 128 };
126 129
130 } // namespace media
131
127 #endif // MEDIA_AUDIO_AUDIO_MANAGER_H_ 132 #endif // MEDIA_AUDIO_AUDIO_MANAGER_H_
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