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 <stddef.h> 14 15 #include <algorithm> 16 #include <functional> 17 18 #include "api/array_view.h" 19 20 namespace webrtc { 21 ReverbModel()22ReverbModel::ReverbModel() { 23 Reset(); 24 } 25 26 ReverbModel::~ReverbModel() = default; 27 Reset()28void ReverbModel::Reset() { 29 reverb_.fill(0.); 30 } 31 UpdateReverbNoFreqShaping(rtc::ArrayView<const float> power_spectrum,float power_spectrum_scaling,float reverb_decay)32void ReverbModel::UpdateReverbNoFreqShaping( 33 rtc::ArrayView<const float> power_spectrum, 34 float power_spectrum_scaling, 35 float reverb_decay) { 36 if (reverb_decay > 0) { 37 // Update the estimate of the reverberant power. 38 for (size_t k = 0; k < power_spectrum.size(); ++k) { 39 reverb_[k] = (reverb_[k] + power_spectrum[k] * power_spectrum_scaling) * 40 reverb_decay; 41 } 42 } 43 } 44 UpdateReverb(rtc::ArrayView<const float> power_spectrum,rtc::ArrayView<const float> power_spectrum_scaling,float reverb_decay)45void ReverbModel::UpdateReverb( 46 rtc::ArrayView<const float> power_spectrum, 47 rtc::ArrayView<const float> power_spectrum_scaling, 48 float reverb_decay) { 49 if (reverb_decay > 0) { 50 // Update the estimate of the reverberant power. 51 for (size_t k = 0; k < power_spectrum.size(); ++k) { 52 reverb_[k] = 53 (reverb_[k] + power_spectrum[k] * power_spectrum_scaling[k]) * 54 reverb_decay; 55 } 56 } 57 } 58 59 } // namespace webrtc 60