Improved AGC update scheme for the audio backend in Chrome

media/audio/audio_io.h

Index: media/audio/audio_io.h
diff --git a/media/audio/audio_io.h b/media/audio/audio_io.h
index 0f3f67379fb8278ef1c54142ff8a43275e9067c0..0845c530a26b84045537d948f679a8df1071369b 100644
--- a/media/audio/audio_io.h
+++ b/media/audio/audio_io.h
@@ -107,6 +107,14 @@ class MEDIA_EXPORT AudioOutputStream {
   // Close the stream. This also generates AudioSourceCallback::OnClose().
   // After calling this method, the object should not be used anymore.
   virtual void Close() = 0;
+
+  // Sets the Automatic Gain Control (AGC) state.
+  // Utilized in live-audio (unified) IO mode.
+  virtual void SetAutomaticGainControl(bool enabled) {}

[tommi (sloooow) - chröme, 2013/05/24 18:21:11]

pure virtual?

[henrika (OOO until Aug 14), 2013/05/27 12:17:43]

Actually the idea was to add these in a follow-up CL when refactoring was done
in the input part. Hence, I remove these for now. Hope that is OK.

+
+  // Returns the Automatic Gain Control (AGC) state.
+  // Utilized in live-audio (unified) IO mode.
+  virtual bool GetAutomaticGainControl() { return false; }

[tommi (sloooow) - chröme, 2013/05/24 18:21:11]

same here

[henrika (OOO until Aug 14), 2013/05/27 12:17:43]

see above

 };
 
 // Models an audio sink receiving recorded audio from the audio driver.