chromium/third_party/webrtc/modules/audio_processing/aec3/aec3_fft.cc

/*
 *  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 "modules/audio_processing/aec3/aec3_fft.h"

#include <algorithm>
#include <functional>
#include <iterator>

#include "rtc_base/checks.h"
#include "system_wrappers/include/cpu_features_wrapper.h"

namespace webrtc {

namespace {

const float kHanning64[kFftLengthBy2] = …;

// Hanning window from Matlab command win = sqrt(hanning(128)).
const float kSqrtHanning128[kFftLength] = …;

bool IsSse2Available() { … }

}  // namespace

Aec3Fft::Aec3Fft() : … { … }

// TODO(peah): Change x to be std::array once the rest of the code allows this.
void Aec3Fft::ZeroPaddedFft(rtc::ArrayView<const float> x,
                            Window window,
                            FftData* X) const { … }

void Aec3Fft::PaddedFft(rtc::ArrayView<const float> x,
                        rtc::ArrayView<const float> x_old,
                        Window window,
                        FftData* X) const { … }

}  // namespace webrtc