Major AEC3 render pipeline changes

webrtc/modules/audio_processing/aec3/fft_buffer.cc

Index: webrtc/modules/audio_processing/aec3/fft_buffer.cc
diff --git a/webrtc/modules/audio_processing/aec3/fft_buffer.cc b/webrtc/modules/audio_processing/aec3/fft_buffer.cc
deleted file mode 100644
index 6542d108ef99d9c363ef715af2ace132c03b656b..0000000000000000000000000000000000000000
--- a/webrtc/modules/audio_processing/aec3/fft_buffer.cc
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- *  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/fft_buffer.h"
-
-#include <algorithm>
-
-#include "webrtc/base/checks.h"
-#include "webrtc/modules/audio_processing/aec3/aec3_common.h"
-
-namespace webrtc {
-
-FftBuffer::FftBuffer(Aec3Optimization optimization,
-                     size_t num_partitions,
-                     const std::vector<size_t> num_ffts_for_spectral_sums)
-    : optimization_(optimization),
-      fft_buffer_(num_partitions),
-      spectrum_buffer_(num_partitions, std::array<float, kFftLengthBy2Plus1>()),
-      spectral_sums_(num_ffts_for_spectral_sums.size(),
-                     std::array<float, kFftLengthBy2Plus1>()) {
-  // Current implementation only allows a maximum of one spectral sum lengths.
-  RTC_DCHECK_EQ(1, num_ffts_for_spectral_sums.size());
-  spectral_sums_length_ = num_ffts_for_spectral_sums[0];
-  RTC_DCHECK_GE(fft_buffer_.size(), spectral_sums_length_);
-
-  for (auto& sum : spectral_sums_) {
-    sum.fill(0.f);
-  }
-
-  for (auto& spectrum : spectrum_buffer_) {
-    spectrum.fill(0.f);
-  }
-
-  for (auto& fft : fft_buffer_) {
-    fft.Clear();
-  }
-}
-
-FftBuffer::~FftBuffer() = default;
-
-void FftBuffer::Insert(const FftData& fft) {
-  // Insert the fft into the buffer.
-  position_ = (position_ - 1 + fft_buffer_.size()) % fft_buffer_.size();
-  fft_buffer_[position_].Assign(fft);
-
-  // Compute and insert the spectrum for the FFT into the spectrum buffer.
-  fft.Spectrum(optimization_, &spectrum_buffer_[position_]);
-
-  // Pre-compute and cachec the spectral sums.
-  std::copy(spectrum_buffer_[position_].begin(),
-            spectrum_buffer_[position_].end(), spectral_sums_[0].begin());
-  size_t position = (position_ + 1) % fft_buffer_.size();
-  for (size_t j = 1; j < spectral_sums_length_; ++j) {
-    const std::array<float, kFftLengthBy2Plus1>& spectrum =
-        spectrum_buffer_[position];
-
-    for (size_t k = 0; k < spectral_sums_[0].size(); ++k) {
-      spectral_sums_[0][k] += spectrum[k];
-    }
-
-    position = position < (fft_buffer_.size() - 1) ? position + 1 : 0;
-  }
-}
-
-}  // namespace webrtc