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/*
* Copyright (c) 2018 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/reverb_model.h"
#include <stddef.h>
#include <algorithm>
#include <functional>
#include "api/array_view.h"
namespace webrtc {
ReverbModel::ReverbModel() {
Reset();
}
ReverbModel::~ReverbModel() = default;
void ReverbModel::Reset() {
reverb_.fill(0.);
}
void ReverbModel::UpdateReverbNoFreqShaping(
rtc::ArrayView<const float> power_spectrum,
float power_spectrum_scaling,
float reverb_decay) {
if (reverb_decay > 0) {
// Update the estimate of the reverberant power.
for (size_t k = 0; k < power_spectrum.size(); ++k) {
reverb_[k] = (reverb_[k] + power_spectrum[k] * power_spectrum_scaling) *
reverb_decay;
}
}
}
void ReverbModel::UpdateReverb(
rtc::ArrayView<const float> power_spectrum,
rtc::ArrayView<const float> power_spectrum_scaling,
float reverb_decay) {
if (reverb_decay > 0) {
// Update the estimate of the reverberant power.
for (size_t k = 0; k < power_spectrum.size(); ++k) {
reverb_[k] =
(reverb_[k] + power_spectrum[k] * power_spectrum_scaling[k]) *
reverb_decay;
}
}
}
} // namespace webrtc