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e58bd8a02b
The frequency shape of the echo path has been included in the reverberation model. Bug: webrtc:9454,chromium:856636 Change-Id: Id2bc3096df31e29328936f94fe965ed1883d70f7 Reviewed-on: https://webrtc-review.googlesource.com/85370 Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Commit-Queue: Jesus de Vicente Pena <devicentepena@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23746}
87 lines
2.8 KiB
C++
87 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018 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/reverb_model.h"
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#include <math.h>
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#include <algorithm>
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#include <functional>
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#include "api/array_view.h"
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#include "modules/audio_processing/aec3/aec3_common.h"
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namespace webrtc {
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ReverbModel::ReverbModel() {
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Reset();
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}
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ReverbModel::~ReverbModel() = default;
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void ReverbModel::Reset() {
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reverb_.fill(0.);
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}
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void ReverbModel::AddReverbNoFreqShaping(
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rtc::ArrayView<const float> power_spectrum,
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float power_spectrum_scaling,
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float reverb_decay,
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rtc::ArrayView<float> reverb_power_spectrum) {
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UpdateReverbContributionsNoFreqShaping(power_spectrum, power_spectrum_scaling,
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reverb_decay);
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// Add the power of the echo reverb to the residual echo power.
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std::transform(reverb_power_spectrum.begin(), reverb_power_spectrum.end(),
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reverb_.begin(), reverb_power_spectrum.begin(),
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std::plus<float>());
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}
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void ReverbModel::AddReverb(rtc::ArrayView<const float> power_spectrum,
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rtc::ArrayView<const float> power_spectrum_scaling,
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float reverb_decay,
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rtc::ArrayView<float> reverb_power_spectrum) {
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UpdateReverbContributions(power_spectrum, power_spectrum_scaling,
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reverb_decay);
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// Add the power of the echo reverb to the residual echo power.
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std::transform(reverb_power_spectrum.begin(), reverb_power_spectrum.end(),
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reverb_.begin(), reverb_power_spectrum.begin(),
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std::plus<float>());
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}
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void ReverbModel::UpdateReverbContributionsNoFreqShaping(
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rtc::ArrayView<const float> power_spectrum,
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float power_spectrum_scaling,
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float reverb_decay) {
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if (reverb_decay > 0) {
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// Update the estimate of the reverberant power.
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for (size_t k = 0; k < power_spectrum.size(); ++k) {
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reverb_[k] = (reverb_[k] + power_spectrum[k] * power_spectrum_scaling) *
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reverb_decay;
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}
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}
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}
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void ReverbModel::UpdateReverbContributions(
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rtc::ArrayView<const float>& power_spectrum,
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rtc::ArrayView<const float>& power_spectrum_scaling,
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float reverb_decay) {
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if (reverb_decay > 0) {
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// Update the estimate of the reverberant power.
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for (size_t k = 0; k < power_spectrum.size(); ++k) {
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reverb_[k] =
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(reverb_[k] + power_spectrum[k] * power_spectrum_scaling[k]) *
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reverb_decay;
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}
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}
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}
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} // namespace webrtc
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