reverb_model.cc (1572B)
1 /* 2 * Copyright (c) 2018 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "modules/audio_processing/aec3/reverb_model.h" 12 13 #include <cstddef> 14 15 #include "api/array_view.h" 16 17 namespace webrtc { 18 19 ReverbModel::ReverbModel() { 20 Reset(); 21 } 22 23 ReverbModel::~ReverbModel() = default; 24 25 void ReverbModel::Reset() { 26 reverb_.fill(0.); 27 } 28 29 void ReverbModel::UpdateReverbNoFreqShaping( 30 ArrayView<const float> power_spectrum, 31 float power_spectrum_scaling, 32 float reverb_decay) { 33 if (reverb_decay > 0) { 34 // Update the estimate of the reverberant power. 35 for (size_t k = 0; k < power_spectrum.size(); ++k) { 36 reverb_[k] = (reverb_[k] + power_spectrum[k] * power_spectrum_scaling) * 37 reverb_decay; 38 } 39 } 40 } 41 42 void ReverbModel::UpdateReverb(ArrayView<const float> power_spectrum, 43 ArrayView<const float> power_spectrum_scaling, 44 float reverb_decay) { 45 if (reverb_decay > 0) { 46 // Update the estimate of the reverberant power. 47 for (size_t k = 0; k < power_spectrum.size(); ++k) { 48 reverb_[k] = 49 (reverb_[k] + power_spectrum[k] * power_spectrum_scaling[k]) * 50 reverb_decay; 51 } 52 } 53 } 54 55 } // namespace webrtc