Adding full initial version of delay estimation functionality in echo canceller 3

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 24 matching lines @@
 
  private:
   const int sample_rate_hz_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(EchoRemoverImpl);
 };
 
 // TODO(peah): Add functionality.
 EchoRemoverImpl::EchoRemoverImpl(int sample_rate_hz)
     : sample_rate_hz_(sample_rate_hz) {
-  RTC_DCHECK(sample_rate_hz == 8000 || sample_rate_hz == 16000 ||
-             sample_rate_hz == 32000 || sample_rate_hz == 48000);
+  RTC_DCHECK(ValidFullBandRate(sample_rate_hz_));
 }
 
 EchoRemoverImpl::~EchoRemoverImpl() = default;
 
 // TODO(peah): Add functionality.
 void EchoRemoverImpl::ProcessBlock(
     const rtc::Optional<size_t>& echo_path_delay_samples,
     const EchoPathVariability& echo_path_variability,
     bool capture_signal_saturation,
     const std::vector<std::vector<float>>& render,
     std::vector<std::vector<float>>* capture) {
   RTC_DCHECK(capture);
   RTC_DCHECK_EQ(render.size(), NumBandsForRate(sample_rate_hz_));
   RTC_DCHECK_EQ(capture->size(), NumBandsForRate(sample_rate_hz_));
   RTC_DCHECK_EQ(render[0].size(), kBlockSize);
   RTC_DCHECK_EQ((*capture)[0].size(), kBlockSize);
 }
 
 // TODO(peah): Add functionality.
 void EchoRemoverImpl::UpdateEchoLeakageStatus(bool leakage_detected) {}
 
 }  // namespace
 
 EchoRemover* EchoRemover::Create(int sample_rate_hz) {
   return new EchoRemoverImpl(sample_rate_hz);
 }
 
 }  // namespace webrtc