chromium/third_party/webrtc/modules/audio_processing/ns/fast_math.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/fast_math.h"

#include <math.h>
#include <stdint.h>

#include "rtc_base/checks.h"

namespace webrtc {

namespace {

float FastLog2f(float in) { … }

}  // namespace

float SqrtFastApproximation(float f) { … }

float Pow2Approximation(float p) { … }

float PowApproximation(float x, float p) { … }

float LogApproximation(float x) { … }

void LogApproximation(rtc::ArrayView<const float> x, rtc::ArrayView<float> y) { … }

float ExpApproximation(float x) { … }

void ExpApproximation(rtc::ArrayView<const float> x, rtc::ArrayView<float> y) { … }

void ExpApproximationSignFlip(rtc::ArrayView<const float> x,
                              rtc::ArrayView<float> y) { … }

}  // namespace webrtc