Added functionality for specifying the initial signal level to use for the gain estimation in the l…

webrtc/modules/audio_processing/include/audio_processing.h

Index: webrtc/modules/audio_processing/include/audio_processing.h
diff --git a/webrtc/modules/audio_processing/include/audio_processing.h b/webrtc/modules/audio_processing/include/audio_processing.h
index 06bfc9ba7f9d8531044105ea4ddd3790cbf90a31..d00d1277b46cb27fe0eaeddefbd418e976557de0 100644
--- a/webrtc/modules/audio_processing/include/audio_processing.h
+++ b/webrtc/modules/audio_processing/include/audio_processing.h
@@ -419,6 +419,11 @@ class AudioProcessing {
   // with this chunk of audio.
   virtual void set_stream_key_pressed(bool key_pressed) = 0;
 
+  // Sets the initial peak level to use inside the level controller in order
+  // to compute the signal gain. The unit for the peak level is dBFS and
+  // the allowed range is [-100, 0].
+  virtual void SetLevelControllerInitialLevel(float level) = 0;
+
   // Sets a delay |offset| in ms to add to the values passed in through
   // set_stream_delay_ms(). May be positive or negative.
   //