blob: 1bd2b594e06aac0ba509d6ecf5192501c8c6f1d0 [file] [log] [blame]
* 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 <stddef.h>
#include <array>
#include <vector>
#include "modules/audio_processing/aec3/aec3_common.h"
namespace webrtc {
// The ReverbModelFallback class describes an exponential reverberant model.
// This model is expected to be applied over the echo power spectrum that
// is estimated by the linear filter.
class ReverbModelFallback {
explicit ReverbModelFallback(size_t length_blocks);
// Resets the state
void Reset();
// Adds the estimated unmodelled echo power to the residual echo power
// estimate.
void AddEchoReverb(const std::array<float, kFftLengthBy2Plus1>& S2,
size_t delay,
float reverb_decay_factor,
std::array<float, kFftLengthBy2Plus1>* R2);
// Returns the current power spectrum reverberation contributions.
const std::array<float, kFftLengthBy2Plus1>& GetPowerSpectrum() const {
return R2_reverb_;
std::array<float, kFftLengthBy2Plus1> R2_reverb_;
int S2_old_index_ = 0;
std::vector<std::array<float, kFftLengthBy2Plus1>> S2_old_;
} // namespace webrtc