Add empty residual echo detector.

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 130 matching lines @@
   struct ApmPublicSubmodules;
   struct ApmPrivateSubmodules;
 
   class ApmSubmoduleStates {
    public:
     ApmSubmoduleStates();
     // Updates the submodule state and returns true if it has changed.
     bool Update(bool high_pass_filter_enabled,
                 bool echo_canceller_enabled,
                 bool mobile_echo_controller_enabled,
+                bool residual_echo_detector_enabled,
                 bool noise_suppressor_enabled,
                 bool intelligibility_enhancer_enabled,
                 bool beamformer_enabled,
                 bool adaptive_gain_controller_enabled,
                 bool level_controller_enabled,
                 bool voice_activity_detector_enabled,
                 bool level_estimator_enabled,
                 bool transient_suppressor_enabled);
     bool CaptureMultiBandSubModulesActive() const;
     bool CaptureMultiBandProcessingActive() const;
     bool RenderMultiBandSubModulesActive() const;
     bool RenderMultiBandProcessingActive() const;
 
    private:
     bool high_pass_filter_enabled_ = false;
     bool echo_canceller_enabled_ = false;
     bool mobile_echo_controller_enabled_ = false;
+    bool residual_echo_detector_enabled_ = false;
     bool noise_suppressor_enabled_ = false;
     bool intelligibility_enhancer_enabled_ = false;
     bool beamformer_enabled_ = false;
     bool adaptive_gain_controller_enabled_ = false;
     bool level_controller_enabled_ = false;
     bool level_estimator_enabled_ = false;
     bool voice_activity_detector_enabled_ = false;
     bool transient_suppressor_enabled_ = false;
     bool first_update_ = true;
   };
@@ skipping 47 matching lines @@
   // acquired.
   void InitializeTransient()
       EXCLUSIVE_LOCKS_REQUIRED(crit_render_, crit_capture_);
   void InitializeBeamformer()
       EXCLUSIVE_LOCKS_REQUIRED(crit_render_, crit_capture_);
   void InitializeIntelligibility()
       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_);
+  void InitializeResidualEchoDetector()
+      EXCLUSIVE_LOCKS_REQUIRED(crit_render_, crit_capture_);
 
   // Capture-side exclusive methods possibly running APM in a multi-threaded
   // manner that are called with the render lock already acquired.
   int ProcessCaptureStreamLocked() EXCLUSIVE_LOCKS_REQUIRED(crit_capture_);
   void MaybeUpdateHistograms() EXCLUSIVE_LOCKS_REQUIRED(crit_capture_);
 
   // Render-side exclusive methods possibly running APM in a multi-threaded
   // manner that are called with the render lock already acquired.
   // TODO(ekm): Remove once all clients updated to new interface.
   int AnalyzeReverseStreamLocked(const float* const* src,
@@ skipping 115 matching lines @@
     ApmRenderState();
     ~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_