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/*
* 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 "modules/audio_processing/aec3/render_buffer.h"
#include <algorithm>
#include <functional>
#include "modules/audio_processing/aec3/aec3_common.h"
#include "rtc_base/checks.h"
namespace webrtc {
RenderBuffer::RenderBuffer(BlockBuffer* block_buffer,
SpectrumBuffer* spectrum_buffer,
FftBuffer* fft_buffer)
: block_buffer_(block_buffer),
spectrum_buffer_(spectrum_buffer),
fft_buffer_(fft_buffer) {
RTC_DCHECK(block_buffer_);
RTC_DCHECK(spectrum_buffer_);
RTC_DCHECK(fft_buffer_);
RTC_DCHECK_EQ(block_buffer_->buffer.size(), fft_buffer_->buffer.size());
RTC_DCHECK_EQ(spectrum_buffer_->buffer.size(), fft_buffer_->buffer.size());
RTC_DCHECK_EQ(spectrum_buffer_->read, fft_buffer_->read);
RTC_DCHECK_EQ(spectrum_buffer_->write, fft_buffer_->write);
}
RenderBuffer::~RenderBuffer() = default;
void RenderBuffer::SpectralSum(
size_t num_spectra,
std::array<float, kFftLengthBy2Plus1>* X2) const {
X2->fill(0.f);
int position = spectrum_buffer_->read;
for (size_t j = 0; j < num_spectra; ++j) {
for (const auto& channel_spectrum : spectrum_buffer_->buffer[position]) {
for (size_t k = 0; k < X2->size(); ++k) {
(*X2)[k] += channel_spectrum[k];
}
}
position = spectrum_buffer_->IncIndex(position);
}
}
void RenderBuffer::SpectralSums(
size_t num_spectra_shorter,
size_t num_spectra_longer,
std::array<float, kFftLengthBy2Plus1>* X2_shorter,
std::array<float, kFftLengthBy2Plus1>* X2_longer) const {
RTC_DCHECK_LE(num_spectra_shorter, num_spectra_longer);
X2_shorter->fill(0.f);
int position = spectrum_buffer_->read;
size_t j = 0;
for (; j < num_spectra_shorter; ++j) {
for (const auto& channel_spectrum : spectrum_buffer_->buffer[position]) {
for (size_t k = 0; k < X2_shorter->size(); ++k) {
(*X2_shorter)[k] += channel_spectrum[k];
}
}
position = spectrum_buffer_->IncIndex(position);
}
std::copy(X2_shorter->begin(), X2_shorter->end(), X2_longer->begin());
for (; j < num_spectra_longer; ++j) {
for (const auto& channel_spectrum : spectrum_buffer_->buffer[position]) {
for (size_t k = 0; k < X2_longer->size(); ++k) {
(*X2_longer)[k] += channel_spectrum[k];
}
}
position = spectrum_buffer_->IncIndex(position);
}
}
} // namespace webrtc
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