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

Issue 1175003004: Change audio IPC enums from kConstantStyle to MACRO_STYLE (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebase. Created 5 years, 6 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_OUTPUT_IPC_H_ 5 #ifndef MEDIA_AUDIO_AUDIO_OUTPUT_IPC_H_
6 #define MEDIA_AUDIO_AUDIO_OUTPUT_IPC_H_ 6 #define MEDIA_AUDIO_AUDIO_OUTPUT_IPC_H_
7 7
8 #include <string> 8 #include <string>
9 9
10 #include "base/memory/shared_memory.h" 10 #include "base/memory/shared_memory.h"
11 #include "base/sync_socket.h" 11 #include "base/sync_socket.h"
12 #include "media/audio/audio_parameters.h" 12 #include "media/audio/audio_parameters.h"
13 #include "media/base/media_export.h" 13 #include "media/base/media_export.h"
14 #include "url/gurl.h" 14 #include "url/gurl.h"
15 15
16 namespace media { 16 namespace media {
17 17
18 // Result of an audio output device switch operation 18 // Result of an audio output device switch operation
19 enum SwitchOutputDeviceResult { 19 enum SwitchOutputDeviceResult {
20 SWITCH_OUTPUT_DEVICE_RESULT_SUCCESS = 0, 20 SWITCH_OUTPUT_DEVICE_RESULT_SUCCESS = 0,
21 SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_FOUND, 21 SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_FOUND,
22 SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_AUTHORIZED, 22 SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_AUTHORIZED,
23 SWITCH_OUTPUT_DEVICE_RESULT_ERROR_OBSOLETE, 23 SWITCH_OUTPUT_DEVICE_RESULT_ERROR_OBSOLETE,
24 SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_SUPPORTED, 24 SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_SUPPORTED,
25 SWITCH_OUTPUT_DEVICE_RESULT_LAST = 25 SWITCH_OUTPUT_DEVICE_RESULT_LAST =
26 SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_SUPPORTED, 26 SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_SUPPORTED,
27 }; 27 };
28 28
29 // Current status of the audio output stream in the browser process. Browser
30 // sends information about the current playback state and error to the
31 // renderer process using this type.
32 enum AudioOutputIPCDelegateState {
33 AUDIO_OUTPUT_IPC_DELEGATE_STATE_PLAYING,
34 AUDIO_OUTPUT_IPC_DELEGATE_STATE_PAUSED,
35 AUDIO_OUTPUT_IPC_DELEGATE_STATE_ERROR,
36 AUDIO_OUTPUT_IPC_DELEGATE_STATE_LAST = AUDIO_OUTPUT_IPC_DELEGATE_STATE_ERROR
37 };
38
29 // Contains IPC notifications for the state of the server side 39 // Contains IPC notifications for the state of the server side
30 // (AudioOutputController) audio state changes and when an AudioOutputController 40 // (AudioOutputController) audio state changes and when an AudioOutputController
31 // has been created. Implemented by AudioOutputDevice. 41 // has been created. Implemented by AudioOutputDevice.
32 class MEDIA_EXPORT AudioOutputIPCDelegate { 42 class MEDIA_EXPORT AudioOutputIPCDelegate {
33 public: 43 public:
34 // Current status of the audio output stream in the browser process. Browser
35 // sends information about the current playback state and error to the
36 // renderer process using this type.
37 enum State {
38 kPlaying,
39 kPaused,
40 kError,
41 kStateLast = kError
42 };
43 44
44 // Called when state of an audio stream has changed. 45 // Called when state of an audio stream has changed.
45 virtual void OnStateChanged(State state) = 0; 46 virtual void OnStateChanged(AudioOutputIPCDelegateState state) = 0;
46 47
47 // Called when an audio stream has been created. 48 // Called when an audio stream has been created.
48 // The shared memory |handle| points to a memory section that's used to 49 // The shared memory |handle| points to a memory section that's used to
49 // transfer audio buffers from the AudioOutputIPCDelegate back to the 50 // transfer audio buffers from the AudioOutputIPCDelegate back to the
50 // AudioRendererHost. The implementation of OnStreamCreated takes ownership. 51 // AudioRendererHost. The implementation of OnStreamCreated takes ownership.
51 // The |socket_handle| is used by AudioRendererHost to signal requests for 52 // The |socket_handle| is used by AudioRendererHost to signal requests for
52 // audio data to be written into the shared memory. The AudioOutputIPCDelegate 53 // audio data to be written into the shared memory. The AudioOutputIPCDelegate
53 // must read from this socket and provide audio whenever data (search for 54 // must read from this socket and provide audio whenever data (search for
54 // "pending_bytes") is received. 55 // "pending_bytes") is received.
55 virtual void OnStreamCreated(base::SharedMemoryHandle handle, 56 virtual void OnStreamCreated(base::SharedMemoryHandle handle,
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96 // AudioOutputController in the peer process. 97 // AudioOutputController in the peer process.
97 virtual void CloseStream() = 0; 98 virtual void CloseStream() = 0;
98 99
99 // Sets the volume of the audio stream. 100 // Sets the volume of the audio stream.
100 virtual void SetVolume(double volume) = 0; 101 virtual void SetVolume(double volume) = 0;
101 }; 102 };
102 103
103 } // namespace media 104 } // namespace media
104 105
105 #endif // MEDIA_AUDIO_AUDIO_OUTPUT_IPC_H_ 106 #endif // MEDIA_AUDIO_AUDIO_OUTPUT_IPC_H_
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