blob: 91a8c6ceb8882531726ca835b3d4cb25f1b14033 [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 <array>
#include "webrtc/modules/audio_processing/aec3/aec3_common.h"
#include "webrtc/rtc_base/constructormagic.h"
namespace webrtc {
// Estimates the echo return loss enhancement based on the signal spectra.
class ErleEstimator {
ErleEstimator(float min_erle, float max_erle_lf, float max_erle_hf);
// Updates the ERLE estimate.
void Update(const std::array<float, kFftLengthBy2Plus1>& render_spectrum,
const std::array<float, kFftLengthBy2Plus1>& capture_spectrum,
const std::array<float, kFftLengthBy2Plus1>& subtractor_spectrum);
// Returns the most recent ERLE estimate.
const std::array<float, kFftLengthBy2Plus1>& Erle() const { return erle_; }
std::array<float, kFftLengthBy2Plus1> erle_;
std::array<int, kFftLengthBy2Minus1> hold_counters_;
const float min_erle_;
const float max_erle_lf_;
const float max_erle_hf_;
} // namespace webrtc