Renderer side audio device change wip...

media/base/audio_renderer_sink.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_BASE_AUDIO_RENDERER_SINK_H_
 #define MEDIA_BASE_AUDIO_RENDERER_SINK_H_
 
 #include <vector>
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
@@ skipping 17 matching lines @@
     virtual int Render(AudioBus* dest, int audio_delay_milliseconds) = 0;
 
     // Synchronized audio I/O - see InitializeIO() below.
     virtual void RenderIO(AudioBus* source,
                           AudioBus* dest,
                           int audio_delay_milliseconds) {}
 
     // Signals an error has occurred.
     virtual void OnRenderError() = 0;
 
+    // Optional method for handling device change notifications from the
+    // browser.
+    virtual void OnDeviceChange() {};
+
    protected:
     virtual ~RenderCallback() {}
   };
 
   // Sets important information about the audio stream format.
   // It must be called before any of the other methods.
   virtual void Initialize(const AudioParameters& params,
                           RenderCallback* callback) = 0;
 
   // InitializeIO() may be called instead of Initialize() for clients who wish
@@ skipping 24 matching lines @@
   virtual bool SetVolume(double volume) = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<AudioRendererSink>;
   virtual ~AudioRendererSink() {}
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_RENDERER_SINK_H_