Associate audio streams with their source/destination RenderView.

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 dba3ba82df7aa691f13ed034ce3e2f21eba102f6..0462aa76fef9f3ab2643ad1db5786317a2a8f7d8 100644
--- a/content/renderer/media/audio_renderer_mixer_manager.h
+++ b/content/renderer/media/audio_renderer_mixer_manager.h
@@ -10,6 +10,7 @@
 #include "base/synchronization/lock.h"
 #include "content/common/content_export.h"
 #include "media/audio/audio_parameters.h"
+#include "media/base/audio_renderer_sink.h"
 
 namespace media {
 class AudioRendererMixer;
@@ -35,7 +36,7 @@ class CONTENT_EXPORT AudioRendererMixerManager {
  public:
   // Construct an instance using the given audio hardware configuration.
   AudioRendererMixerManager(int hardware_sample_rate, int hardware_buffer_size);
-  ~AudioRendererMixerManager();
+  virtual ~AudioRendererMixerManager();

[scherkus (not reviewing), 2012/11/27 22:55:26]

sadness.

why not add a SetAudioRendererSinkForTesting() or something similar?

[miu, 2012/11/28 07:26:20]

Done.

 
   // Creates an AudioRendererMixerInput with the proper callbacks necessary to
   // retrieve an AudioRendererMixer instance from AudioRendererMixerManager.
@@ -45,6 +46,10 @@ class CONTENT_EXPORT AudioRendererMixerManager {
  private:
   friend class AudioRendererMixerManagerTest;
 
+  // Returns a new instance connected to the underlying audio implementation.
+  // This method is overridden for unit testing.
+  virtual media::AudioRendererSink* CreateAudioRendererSink();
+
   // Returns a mixer instance based on AudioParameters; an existing one if one
   // with the provided AudioParameters exists or a new one if not.
   media::AudioRendererMixer* GetMixer(const media::AudioParameters& params);