Renderer side audio device change wip...

media/audio/audio_output_ipc.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_AUDIO_AUDIO_OUTPUT_IPC_H_
 #define MEDIA_AUDIO_AUDIO_OUTPUT_IPC_H_
 
 #include "base/shared_memory.h"
 #include "base/sync_socket.h"
 #include "media/audio/audio_parameters.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 // Contains IPC notifications for the state of the server side
 // (AudioOutputController) audio state changes and when an AudioOutputController
 // has been created.  Implemented by AudioOutputDevice.
 class MEDIA_EXPORT AudioOutputIPCDelegate {
  public:
   // Current status of the audio output stream in the browser process. Browser
   // sends information about the current playback state and error to the
   // renderer process using this type.
   enum State {
     kPlaying,
     kPaused,
-    kError
+    kError,
+    kDeviceChange,
   };
 
   // Called when state of an audio stream has changed.
   virtual void OnStateChanged(State state) = 0;
 
   // Called when an audio stream has been created.
   // The shared memory |handle| points to a memory section that's used to
   // transfer audio buffers from the AudioOutputIPCDelegate back to the
   // AudioRendererHost.  The implementation of OnStreamCreated takes ownership.
   // The |socket_handle| is used by AudioRendererHost to signal requests for
@@ skipping 60 matching lines @@
   // Sets the volume of the audio stream.
   virtual void SetVolume(int stream_id, double volume) = 0;
 
  protected:
   virtual ~AudioOutputIPC();
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_OUTPUT_IPC_H_