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92ea95e34a
In https://webrtc-review.googlesource.com/c/src/+/1560 we moved WebRTC from src/webrtc to src/ (in order to preserve an healthy git history). This CL takes care of fixing header guards, #include paths, etc... NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iea91618212bee0af16aa3f05071eab8f93706578 Reviewed-on: https://webrtc-review.googlesource.com/1561 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19846}
95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
/*
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* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/audio_processing/aec3/render_buffer.h"
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#include <algorithm>
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#include "modules/audio_processing/aec3/aec3_common.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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RenderBuffer::RenderBuffer(Aec3Optimization optimization,
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size_t num_bands,
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size_t num_partitions,
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const std::vector<size_t> num_ffts_for_spectral_sums)
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: optimization_(optimization),
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fft_buffer_(num_partitions),
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spectrum_buffer_(num_partitions, std::array<float, kFftLengthBy2Plus1>()),
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spectral_sums_(num_ffts_for_spectral_sums.size(),
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std::array<float, kFftLengthBy2Plus1>()),
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last_block_(num_bands, std::vector<float>(kBlockSize, 0.f)),
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fft_() {
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// Current implementation only allows a maximum of one spectral sum lengths.
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RTC_DCHECK_EQ(1, num_ffts_for_spectral_sums.size());
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spectral_sums_length_ = num_ffts_for_spectral_sums[0];
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RTC_DCHECK_GE(fft_buffer_.size(), spectral_sums_length_);
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Clear();
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}
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RenderBuffer::~RenderBuffer() = default;
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void RenderBuffer::Clear() {
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position_ = 0;
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for (auto& sum : spectral_sums_) {
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sum.fill(0.f);
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}
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for (auto& spectrum : spectrum_buffer_) {
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spectrum.fill(0.f);
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}
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for (auto& fft : fft_buffer_) {
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fft.Clear();
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}
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for (auto& b : last_block_) {
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std::fill(b.begin(), b.end(), 0.f);
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}
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}
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void RenderBuffer::Insert(const std::vector<std::vector<float>>& block) {
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// Compute the FFT of the data in the lowest band.
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FftData X;
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fft_.PaddedFft(block[0], last_block_[0], &X);
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// Copy the last render frame.
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RTC_DCHECK_EQ(last_block_.size(), block.size());
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for (size_t k = 0; k < block.size(); ++k) {
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RTC_DCHECK_EQ(last_block_[k].size(), block[k].size());
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std::copy(block[k].begin(), block[k].end(), last_block_[k].begin());
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}
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// Insert X into the buffer.
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position_ = position_ > 0 ? position_ - 1 : fft_buffer_.size() - 1;
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fft_buffer_[position_].Assign(X);
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// Compute and insert the spectrum for the FFT into the spectrum buffer.
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X.Spectrum(optimization_, &spectrum_buffer_[position_]);
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// Pre-compute and cache the spectral sums.
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std::copy(spectrum_buffer_[position_].begin(),
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spectrum_buffer_[position_].end(), spectral_sums_[0].begin());
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size_t position = (position_ + 1) % fft_buffer_.size();
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for (size_t j = 1; j < spectral_sums_length_; ++j) {
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const std::array<float, kFftLengthBy2Plus1>& spectrum =
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spectrum_buffer_[position];
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for (size_t k = 0; k < spectral_sums_[0].size(); ++k) {
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spectral_sums_[0][k] += spectrum[k];
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}
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position = position < (fft_buffer_.size() - 1) ? position + 1 : 0;
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}
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}
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} // namespace webrtc
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