chromium/third_party/webrtc/modules/audio_processing/ns/wiener_filter.cc

/*
 *  Copyright (c) 2019 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/ns/wiener_filter.h"

#include <math.h>
#include <stdlib.h>
#include <string.h>

#include <algorithm>

#include "modules/audio_processing/ns/fast_math.h"
#include "rtc_base/checks.h"

namespace webrtc {

WienerFilter::WienerFilter(const SuppressionParams& suppression_params)
    : … { … }

void WienerFilter::Update(
    int32_t num_analyzed_frames,
    rtc::ArrayView<const float, kFftSizeBy2Plus1> noise_spectrum,
    rtc::ArrayView<const float, kFftSizeBy2Plus1> prev_noise_spectrum,
    rtc::ArrayView<const float, kFftSizeBy2Plus1> parametric_noise_spectrum,
    rtc::ArrayView<const float, kFftSizeBy2Plus1> signal_spectrum) { … }

float WienerFilter::ComputeOverallScalingFactor(
    int32_t num_analyzed_frames,
    float prior_speech_probability,
    float energy_before_filtering,
    float energy_after_filtering) const { … }

}  // namespace webrtc