Further tuning for AEC3 for initial echo suppression and handling of echo path changes

webrtc/modules/audio_processing/aec3/echo_remover.cc

 /*
  *  Copyright (c) 2017 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.
  */
 #include "webrtc/modules/audio_processing/aec3/echo_remover.h"
@@ skipping 125 matching lines @@
   data_dumper_->DumpWav("aec3_processblock_capture_input", kBlockSize, &y0[0],
                         LowestBandRate(sample_rate_hz_), 1);
   data_dumper_->DumpWav("aec3_processblock_render_input", kBlockSize, &x0[0],
                         LowestBandRate(sample_rate_hz_), 1);
 
   aec_state_.UpdateCaptureSaturation(capture_signal_saturation);
 
   if (echo_path_variability.AudioPathChanged()) {
     subtractor_.HandleEchoPathChange(echo_path_variability);
     power_echo_model_.HandleEchoPathChange(echo_path_variability);
+    residual_echo_estimator_.HandleEchoPathChange(echo_path_variability);
   }
 
   std::array<float, kFftLengthBy2Plus1> Y2;
   std::array<float, kFftLengthBy2Plus1> S2_power;
   std::array<float, kFftLengthBy2Plus1> R2;
   std::array<float, kFftLengthBy2Plus1> S2_linear;
   std::array<float, kFftLengthBy2Plus1> G;
   FftData X;
   FftData Y;
   FftData comfort_noise;
@@ skipping 87 matching lines @@
                         aec_state_.SaturatedCapture() ? 1 : 0);
 }
 
 }  // namespace
 
 EchoRemover* EchoRemover::Create(int sample_rate_hz) {
   return new EchoRemoverImpl(sample_rate_hz);
 }
 
 }  // namespace webrtc