AGC2 as a new APM sub-module operating with hard-coded gain.

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 a1cd398b022f225adc233f7ddaa6abcb66ccd985..4c5d02a2d3813892b5d151fb4268272b06c9cc40 100644
--- a/webrtc/modules/audio_processing/include/audio_processing.h
+++ b/webrtc/modules/audio_processing/include/audio_processing.h
@@ -267,6 +267,15 @@ class AudioProcessing {
     struct EchoCanceller3 {
       bool enabled = false;
     } echo_canceller3;
+
+    // Gain Controller 2 enables the next generation AGC functionality. This

[peah-webrtc, 2017/05/05 20:44:11]

Gain Controller 2 enables -> Enables

[AleBzk, 2017/05/16 12:38:43]

Done.

+    // feature replaces the standard methods of adaptive gain control in the

[peah-webrtc, 2017/05/05 20:44:11]

adaptive gain control -> gain control

[AleBzk, 2017/05/16 12:38:43]

Done.

+    // previous AGC.
+    // The functionality is not yet activated in the code and turning this on
+    // does not yet have the desired behavior.
+    struct GainController2 {
+      bool enabled = false;
+    } gain_controller2;
   };
 
   // TODO(mgraczyk): Remove once all methods that use ChannelLayout are gone.