AGC2 dummy module: fixed gain param, APM integration, audioproc_f adaptation

webrtc/modules/audio_processing/include/audio_processing.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 308 matching lines @@
       } param;
       bool enabled = false;
     } echo_canceller3;
 
     // Enables the next generation AGC functionality. This feature replaces the
     // standard methods of gain control in the 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;
+      // Fixed digital gain params.
+      float fixed_gain_db = 0.f;
     } gain_controller2;
 
     // Explicit copy assignment implementation to avoid issues with memory
     // sanitizer complaints in case of self-assignment.
     // TODO(peah): Add buildflag to ensure that this is only included for memory
     // sanitizer builds.
     Config& operator=(const Config& config) {
       if (this != &config) {
         memcpy(this, &config, sizeof(*this));
       }
@@ skipping 793 matching lines @@
   // This does not impact the size of frames passed to |ProcessStream()|.
   virtual int set_frame_size_ms(int size) = 0;
   virtual int frame_size_ms() const = 0;
 
  protected:
   virtual ~VoiceDetection() {}
 };
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_INCLUDE_AUDIO_PROCESSING_H_