Renderer side audio device change wip...

media/base/audio_renderer_mixer.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_MIXER_H_
 #define MEDIA_BASE_AUDIO_RENDERER_MIXER_H_
 
 #include <list>
 
 #include "base/synchronization/lock.h"
@@ skipping 12 matching lines @@
  public:
   AudioRendererMixer(const AudioParameters& input_params,
                      const AudioParameters& output_params,
                      const scoped_refptr<AudioRendererSink>& sink);
   virtual ~AudioRendererMixer();
 
   // Add or remove a mixer input from mixing; called by AudioRendererMixerInput.
   void AddMixerInput(const scoped_refptr<AudioRendererMixerInput>& input);
   void RemoveMixerInput(const scoped_refptr<AudioRendererMixerInput>& input);
 
+  const AudioParameters& input_params() { return input_params_; }
+  const AudioParameters& output_params() { return output_params_; }
+
   void set_pause_delay_for_testing(base::TimeDelta delay) {
     pause_delay_ = delay;
   }
 
  private:
   // AudioRendererSink::RenderCallback implementation.
   virtual int Render(AudioBus* audio_bus,
                      int audio_delay_milliseconds) OVERRIDE;
   virtual void OnRenderError() OVERRIDE;
+  virtual void OnDeviceChange() OVERRIDE;
 
   // Output sink for this mixer.
   scoped_refptr<AudioRendererSink> audio_sink_;
 
   // Set of mixer inputs to be mixed by this mixer.  Access is thread-safe
   // through |mixer_inputs_lock_|.
   typedef std::list<scoped_refptr<AudioRendererMixerInput> >
       AudioRendererMixerInputSet;
   AudioRendererMixerInputSet mixer_inputs_;
   base::Lock mixer_inputs_lock_;
 
   // Handles mixing and resampling between input and output parameters.
   AudioConverter audio_converter_;
 
   // Handles physical stream pause when no inputs are playing.  For latency
   // reasons we don't want to immediately pause the physical stream.
   base::TimeDelta pause_delay_;
   base::Time last_play_time_;
   bool playing_;
 
+  AudioParameters input_params_;
+  AudioParameters output_params_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioRendererMixer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_RENDERER_MIXER_H_