chromium/third_party/webrtc/common_audio/real_fourier_ooura.cc

/*
 *  Copyright (c) 2015 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 "common_audio/real_fourier_ooura.h"

#include <algorithm>
#include <cmath>

#include "common_audio/third_party/ooura/fft_size_256/fft4g.h"
#include "rtc_base/checks.h"

namespace webrtc {

complex;

namespace {

void Conjugate(complex<float>* array, size_t complex_length) { … }

size_t ComputeWorkIpSize(size_t fft_length) { … }

}  // namespace

RealFourierOoura::RealFourierOoura(int fft_order)
    : … { … }

RealFourierOoura::~RealFourierOoura() = default;

void RealFourierOoura::Forward(const float* src, complex<float>* dest) const { … }

void RealFourierOoura::Inverse(const complex<float>* src, float* dest) const { … }

int RealFourierOoura::order() const { … }

}  // namespace webrtc