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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_INPUT_IPC_H_ | 5 #ifndef MEDIA_AUDIO_AUDIO_INPUT_IPC_H_ | 
| 6 #define MEDIA_AUDIO_AUDIO_INPUT_IPC_H_ | 6 #define MEDIA_AUDIO_AUDIO_INPUT_IPC_H_ | 
| 7 | 7 | 
| 8 #include "base/memory/shared_memory.h" | 8 #include "base/memory/shared_memory.h" | 
| 9 #include "base/sync_socket.h" | 9 #include "base/sync_socket.h" | 
| 10 #include "media/audio/audio_parameters.h" | 10 #include "media/audio/audio_parameters.h" | 
| 11 #include "media/base/media_export.h" | 11 #include "media/base/media_export.h" | 
| 12 | 12 | 
| 13 namespace media { | 13 namespace media { | 
| 14 | 14 | 
|  | 15 enum AudioInputIPCDelegateState { | 
|  | 16   AUDIO_INPUT_IPC_DELEGATE_STATE_RECORDING, | 
|  | 17   AUDIO_INPUT_IPC_DELEGATE_STATE_STOPPED, | 
|  | 18   AUDIO_INPUT_IPC_DELEGATE_STATE_ERROR, | 
|  | 19   AUDIO_INPUT_IPC_DELEGATE_STATE_LAST = AUDIO_INPUT_IPC_DELEGATE_STATE_ERROR, | 
|  | 20 }; | 
|  | 21 | 
| 15 // Contains IPC notifications for the state of the server side | 22 // Contains IPC notifications for the state of the server side | 
| 16 // (AudioInputController) audio state changes and when an AudioInputController | 23 // (AudioInputController) audio state changes and when an AudioInputController | 
| 17 // has been created.  Implemented by AudioInputDevice. | 24 // has been created.  Implemented by AudioInputDevice. | 
| 18 class MEDIA_EXPORT AudioInputIPCDelegate { | 25 class MEDIA_EXPORT AudioInputIPCDelegate { | 
| 19  public: | 26  public: | 
| 20   // Valid states for the input stream. |  | 
| 21   enum State { |  | 
| 22     kRecording, |  | 
| 23     kStopped, |  | 
| 24     kError, |  | 
| 25     kStateLast = kError |  | 
| 26   }; |  | 
| 27 |  | 
| 28   // Called when an AudioInputController has been created. | 27   // Called when an AudioInputController has been created. | 
| 29   // The shared memory |handle| points to a memory section that's used to | 28   // The shared memory |handle| points to a memory section that's used to | 
| 30   // transfer data between the AudioInputDevice and AudioInputController | 29   // transfer data between the AudioInputDevice and AudioInputController | 
| 31   // objects.  The implementation of OnStreamCreated takes ownership. | 30   // objects.  The implementation of OnStreamCreated takes ownership. | 
| 32   // The |socket_handle| is used by the AudioInputController to signal | 31   // The |socket_handle| is used by the AudioInputController to signal | 
| 33   // notifications that more data is available and can optionally provide | 32   // notifications that more data is available and can optionally provide | 
| 34   // parameter changes back.  The AudioInputDevice must read from this socket | 33   // parameter changes back.  The AudioInputDevice must read from this socket | 
| 35   // and process the shared memory whenever data is read from the socket. | 34   // and process the shared memory whenever data is read from the socket. | 
| 36   virtual void OnStreamCreated(base::SharedMemoryHandle handle, | 35   virtual void OnStreamCreated(base::SharedMemoryHandle handle, | 
| 37                                base::SyncSocket::Handle socket_handle, | 36                                base::SyncSocket::Handle socket_handle, | 
| 38                                int length, | 37                                int length, | 
| 39                                int total_segments) = 0; | 38                                int total_segments) = 0; | 
| 40 | 39 | 
| 41   // Called when state of an audio stream has changed. | 40   // Called when state of an audio stream has changed. | 
| 42   virtual void OnStateChanged(State state) = 0; | 41   virtual void OnStateChanged(AudioInputIPCDelegateState state) = 0; | 
| 43 | 42 | 
| 44   // Called when the input stream volume has changed. | 43   // Called when the input stream volume has changed. | 
| 45   virtual void OnVolume(double volume) = 0; | 44   virtual void OnVolume(double volume) = 0; | 
| 46 | 45 | 
| 47   // Called when the AudioInputIPC object is going away and/or when the | 46   // Called when the AudioInputIPC object is going away and/or when the | 
| 48   // IPC channel has been closed and no more IPC requests can be made. | 47   // IPC channel has been closed and no more IPC requests can be made. | 
| 49   // Implementations should delete their owned AudioInputIPC instance | 48   // Implementations should delete their owned AudioInputIPC instance | 
| 50   // immediately. | 49   // immediately. | 
| 51   virtual void OnIPCClosed() = 0; | 50   virtual void OnIPCClosed() = 0; | 
| 52 | 51 | 
| (...skipping 27 matching lines...) Expand all  Loading... | 
| 80   virtual void SetVolume(double volume) = 0; | 79   virtual void SetVolume(double volume) = 0; | 
| 81 | 80 | 
| 82   // Closes the audio stream, which should shut down the corresponding | 81   // Closes the audio stream, which should shut down the corresponding | 
| 83   // AudioInputController in the peer process. | 82   // AudioInputController in the peer process. | 
| 84   virtual void CloseStream() = 0; | 83   virtual void CloseStream() = 0; | 
| 85 }; | 84 }; | 
| 86 | 85 | 
| 87 }  // namespace media | 86 }  // namespace media | 
| 88 | 87 | 
| 89 #endif  // MEDIA_AUDIO_AUDIO_INPUT_IPC_H_ | 88 #endif  // MEDIA_AUDIO_AUDIO_INPUT_IPC_H_ | 
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