Major AEC3 render pipeline changes

webrtc/modules/audio_processing/aec3/suppression_gain.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/suppression_gain.h"
 
 #include "webrtc/typedefs.h"
 #if defined(WEBRTC_ARCH_X86_FAMILY)
 #include <emmintrin.h>
 #endif
 #include <math.h>
 #include <algorithm>
 #include <functional>
 
+#include "webrtc/base/checks.h"
+
 namespace webrtc {
 namespace {
 
 void GainPostProcessing(std::array<float, kFftLengthBy2Plus1>* gain_squared) {
   // Limit the low frequency gains to avoid the impact of the high-pass filter
   // on the lower-frequency gain influencing the overall achieved gain.
   (*gain_squared)[1] = std::min((*gain_squared)[1], (*gain_squared)[2]);
   (*gain_squared)[0] = (*gain_squared)[1];
 
   // Limit the high frequency gains to avoid the impact of the anti-aliasing
@@ skipping 263 matching lines @@
       break;
 #endif
     default:
       aec3::ComputeGains(nearend_power, residual_echo_power,
                          comfort_noise_power, strong_nearend_margin,
                          &previous_gain_squared_, &previous_masker_, gain);
   }
 }
 
 }  // namespace webrtc