Tab Audio Capture: Browser-side connect/disconnect functionality.

media/audio/audio_output_controller.h

Index: media/audio/audio_output_controller.h
diff --git a/media/audio/audio_output_controller.h b/media/audio/audio_output_controller.h
index 3dae719856508cd6a25e28dc22cd84305a35dd58..5afcc6ebccf97bbb777b8ccbc979aecda84048c3 100644
--- a/media/audio/audio_output_controller.h
+++ b/media/audio/audio_output_controller.h
@@ -63,6 +63,10 @@ class MessageLoop;
 
 namespace media {
 
+// TODO(miu): STUB
+class DivertedAudioOutputStream : public AudioOutputStream {
+};
+
 class MEDIA_EXPORT AudioOutputController
     : public base::RefCountedThreadSafe<AudioOutputController>,
       public AudioOutputStream::AudioSourceCallback,
@@ -158,6 +162,12 @@ class MEDIA_EXPORT AudioOutputController
   // to being called.
   virtual void OnDeviceChange() OVERRIDE;
 
+  // Creates a DivertedAudioOutputStream and diverts audio data to it, away from
+  // the existing AudioOutputStream.  The caller owns the returned object.  When
+  // the object's destructor is invoked (on the IO thread), the diversion
+  // reverts.
+  DivertedAudioOutputStream* Divert();

[Alpha Left Google, 2012/11/20 21:49:43]

I think this class should be DAOS.

[miu, 2012/11/21 08:27:48]

Yep.  The more I think about it, the more we should have a Revert() method to
un-divert the stream.  I'll make that change.

+
  protected:
     // Internal state of the source.
   enum State {