Major updates to the echo removal functionality in AEC3

webrtc/modules/audio_processing/aec3/render_signal_analyzer.h

 /*
  *  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.
  */
 
@@ skipping 10 matching lines @@
 
 namespace webrtc {
 
 // Provides functionality for analyzing the properties of the render signal.
 class RenderSignalAnalyzer {
  public:
   RenderSignalAnalyzer();
   ~RenderSignalAnalyzer();
 
   // Updates the render signal analysis with the most recent render signal.
-  void Update(const RenderBuffer& X_buffer,
+  void Update(const RenderBuffer& render_buffer,
               const rtc::Optional<size_t>& delay_partitions);
 
   // Returns true if the render signal is poorly exciting.
   bool PoorSignalExcitation() const {
     RTC_DCHECK_LT(2, narrow_band_counters_.size());
     return std::any_of(narrow_band_counters_.begin(),
                        narrow_band_counters_.end(),
                        [](size_t a) { return a > 10; });
   }
 
   // Zeros the array around regions with narrow bands signal characteristics.
   void MaskRegionsAroundNarrowBands(
       std::array<float, kFftLengthBy2Plus1>* v) const;
 
  private:
   std::array<size_t, kFftLengthBy2 - 1> narrow_band_counters_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(RenderSignalAnalyzer);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_RENDER_SIGNAL_ANALYZER_H_