Utilizing the AEC3 config struct for constants.

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 249 matching lines @@
 
     struct HighPassFilter {
       bool enabled = false;
     } high_pass_filter;
 
     // Enables the next generation AEC functionality. This feature replaces the
     // standard methods for echo removal in the AEC.
     // The functionality is not yet activated in the code and turning this on
     // does not yet have the desired behavior.
     struct EchoCanceller3 {
+      struct Param {
+        struct Erle {
+          float min = 1.f;
+          float max_l = 8.f;
+          float max_h = 1.5f;
+        } erle;
+
+        struct EpStrength {
+          float lf = 100.f;
+          float mf = 1000.f;
+          float hf = 5000.f;
+          float default_len = 0.8f;
+        } ep_strength;
+
+        struct Mask {
+          float m1 = 0.01f;
+          float m2 = 0.001f;
+          float m3 = 0.01f;
+          float m4 = 0.1f;
+        } gain_mask;
+
+        struct Thresholds {

[hlundin-webrtc, 2017/08/23 14:52:22]

A little too generic. Threshold for what?

[peah-webrtc, 2017/08/24 07:00:52]

I agree. A changed the naming a bit. PTAL

+          float min_echo1 = 192.f;
+          float min_echo2 = 64.f;
+        } thresholds;
+
+        struct GainUpdates {
+          struct GainChanges {
+            float max_inc;
+            float max_dec;
+            float rate_inc;
+            float rate_dec;
+            float min_inc;
+            float min_dec;
+          };
+
+          GainChanges low_noise = {8.f, 8.f, 2.f, 2.f, 4.f, 4.f};
+          GainChanges normal = {4.f, 4.f, 2.f, 2.f, 1.2f, 2.f};
+          GainChanges saturation = {1.2f, 1.2f, 1.5f, 1.5f, 1.f, 1.f};
+
+          float floor_first_increase = 0.001f;
+        } gain_updates;
+      } 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;
     } gain_controller2;
@@ skipping 791 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_