New module for the adaptive level controlling functionality in the audio processing module

webrtc/modules/audio_processing/audio_processing_impl.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 184 matching lines @@
   void InitializeVoiceDetection()
       EXCLUSIVE_LOCKS_REQUIRED(crit_capture_);
   void InitializeEchoCanceller()
       EXCLUSIVE_LOCKS_REQUIRED(crit_render_, crit_capture_);
   void InitializeGainController()
       EXCLUSIVE_LOCKS_REQUIRED(crit_render_, crit_capture_);
   void InitializeEchoControlMobile()
       EXCLUSIVE_LOCKS_REQUIRED(crit_render_, crit_capture_);
   int InitializeLocked(const ProcessingConfig& config)
       EXCLUSIVE_LOCKS_REQUIRED(crit_render_, crit_capture_);
+  void InitializeLevelController() EXCLUSIVE_LOCKS_REQUIRED(crit_capture_);
 
   // Capture-side exclusive methods possibly running APM in a multi-threaded
   // manner that are called with the render lock already acquired.
   int ProcessStreamLocked() EXCLUSIVE_LOCKS_REQUIRED(crit_capture_);
   bool output_copy_needed() const EXCLUSIVE_LOCKS_REQUIRED(crit_capture_);
   bool is_fwd_processed() const EXCLUSIVE_LOCKS_REQUIRED(crit_capture_);
   bool fwd_synthesis_needed() const EXCLUSIVE_LOCKS_REQUIRED(crit_capture_);
   bool fwd_analysis_needed() const EXCLUSIVE_LOCKS_REQUIRED(crit_capture_);
   void MaybeUpdateHistograms() EXCLUSIVE_LOCKS_REQUIRED(crit_capture_);
 
@@ skipping 100 matching lines @@
     std::unique_ptr<AudioBuffer> capture_audio;
     // Only the rate and samples fields of fwd_proc_format_ are used because the
     // forward processing number of channels is mutable and is tracked by the
     // capture_audio_.
     StreamConfig fwd_proc_format;
     int split_rate;
   } capture_ GUARDED_BY(crit_capture_);
 
   struct ApmCaptureNonLockedState {
     ApmCaptureNonLockedState(bool beamformer_enabled,
-                             bool intelligibility_enabled)
+                             bool intelligibility_enabled,
+                             bool level_controller_enabled)
         : fwd_proc_format(kSampleRate16kHz),
           split_rate(kSampleRate16kHz),
           stream_delay_ms(0),
           beamformer_enabled(beamformer_enabled),
-          intelligibility_enabled(intelligibility_enabled) {}
+          intelligibility_enabled(intelligibility_enabled),
+          level_controller_enabled(level_controller_enabled) {}
     // Only the rate and samples fields of fwd_proc_format_ are used because the
     // forward processing number of channels is mutable and is tracked by the
     // capture_audio_.
     StreamConfig fwd_proc_format;
     int split_rate;
     int stream_delay_ms;
     bool beamformer_enabled;
     bool intelligibility_enabled;
+    bool level_controller_enabled;
   } capture_nonlocked_;
 
   struct ApmRenderState {
     std::unique_ptr<AudioConverter> render_converter;
     std::unique_ptr<AudioBuffer> render_audio;
   } render_ GUARDED_BY(crit_render_);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AUDIO_PROCESSING_IMPL_H_