Renderer side audio device change wip...

content/renderer/media/audio_renderer_mixer_manager.h

Index: content/renderer/media/audio_renderer_mixer_manager.h
diff --git a/content/renderer/media/audio_renderer_mixer_manager.h b/content/renderer/media/audio_renderer_mixer_manager.h
index 20afcb83fd1944b61a709b983fde5da70b9b9a0e..5f8507c3d1bcfbd074a19a5e25b8b2ab46a126b8 100644
--- a/content/renderer/media/audio_renderer_mixer_manager.h
+++ b/content/renderer/media/audio_renderer_mixer_manager.h
@@ -13,6 +13,7 @@
 #include "media/audio/audio_parameters.h"
 
 namespace media {
+class AudioHardwareConfig;
 class AudioRendererMixer;
 class AudioRendererMixerInput;
 class AudioRendererSink;
@@ -36,7 +37,7 @@ namespace content {
 class CONTENT_EXPORT AudioRendererMixerManager {
  public:
   // Construct an instance using the given audio hardware configuration.
-  AudioRendererMixerManager(int hardware_sample_rate, int hardware_buffer_size);
+  AudioRendererMixerManager(media::AudioHardwareConfig* hardware_config);
   ~AudioRendererMixerManager();
 
   // Creates an AudioRendererMixerInput with the proper callbacks necessary to
@@ -60,7 +61,10 @@ class CONTENT_EXPORT AudioRendererMixerManager {
     media::AudioRendererMixer* mixer;
     int ref_count;
   };
-  typedef std::map<MixerKey, AudioRendererMixerReference> AudioRendererMixerMap;
+  // typedef std::map<MixerKey, AudioRendererMixerReference> AudioRendererMixerMap;
+  typedef std::pair<media::AudioParameters, media::AudioParameters> IOParamsKey;
+  typedef std::map<IOParamsKey, AudioRendererMixerReference>
+      AudioRendererMixerMap;
 
   // Overrides the AudioRendererSink implementation for unit testing.
   void SetAudioRendererSinkForTesting(media::AudioRendererSink* sink);
@@ -74,7 +78,8 @@ class CONTENT_EXPORT AudioRendererMixerManager {
   // by AudioRendererMixerManager.  Every AudioRendererMixer owner must call
   // this method when it's done with a mixer.
   void RemoveMixer(int source_render_view_id,
-                   const media::AudioParameters& params);
+                   media::AudioRendererMixer* mixer
+                   /*const media::AudioParameters& params*/);
 
   // Active mixers.
   AudioRendererMixerMap mixers_;
@@ -82,8 +87,7 @@ class CONTENT_EXPORT AudioRendererMixerManager {
 
   // Audio hardware configuration.  Used to construct output AudioParameters for
   // each AudioRendererMixer instance.
-  int hardware_sample_rate_;
-  int hardware_buffer_size_;
+  media::AudioHardwareConfig* hardware_config_;
 
   media::AudioRendererSink* sink_for_testing_;