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

webrtc/modules/audio_processing/aec3/render_delay_controller.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/render_delay_controller.h"
@@ skipping 106 matching lines @@
 
 RenderDelayControllerImpl::RenderDelayControllerImpl(
     int sample_rate_hz,
     const RenderDelayBuffer& render_delay_buffer)
     : data_dumper_(
           new ApmDataDumper(rtc::AtomicOps::Increment(&instance_count_))),
       max_delay_(render_delay_buffer.MaxDelay()),
       delay_(render_delay_buffer.Delay()),
       render_buffer_(render_delay_buffer.MaxApiJitter() + 1),
       delay_estimator_(data_dumper_.get(), 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));
 }
 
 RenderDelayControllerImpl::~RenderDelayControllerImpl() = default;
 
 size_t RenderDelayControllerImpl::GetDelay(
     rtc::ArrayView<const float> capture) {
   RTC_DCHECK_EQ(kBlockSize, capture.size());
   if (render_buffer_.Size() == 0) {
     return delay_;
   }
@@ skipping 35 matching lines @@
 
 }  // namespace
 
 RenderDelayController* RenderDelayController::Create(
     int sample_rate_hz,
     const RenderDelayBuffer& render_delay_buffer) {
   return new RenderDelayControllerImpl(sample_rate_hz, render_delay_buffer);
 }
 
 }  // namespace webrtc