chromium/third_party/webrtc/modules/audio_processing/aec3/adaptive_fir_filter.h

/*
 *  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.
 */

#ifndef MODULES_AUDIO_PROCESSING_AEC3_ADAPTIVE_FIR_FILTER_H_
#define MODULES_AUDIO_PROCESSING_AEC3_ADAPTIVE_FIR_FILTER_H_

#include <stddef.h>

#include <array>
#include <vector>

#include "absl/strings/string_view.h"
#include "api/array_view.h"
#include "modules/audio_processing/aec3/aec3_common.h"
#include "modules/audio_processing/aec3/aec3_fft.h"
#include "modules/audio_processing/aec3/fft_data.h"
#include "modules/audio_processing/aec3/render_buffer.h"
#include "modules/audio_processing/logging/apm_data_dumper.h"
#include "rtc_base/system/arch.h"

namespace webrtc {
namespace aec3 {
// Computes and stores the frequency response of the filter.
void ComputeFrequencyResponse(
    size_t num_partitions,
    const std::vector<std::vector<FftData>>& H,
    std::vector<std::array<float, kFftLengthBy2Plus1>>* H2);
#if defined(WEBRTC_HAS_NEON)
void ComputeFrequencyResponse_Neon(
    size_t num_partitions,
    const std::vector<std::vector<FftData>>& H,
    std::vector<std::array<float, kFftLengthBy2Plus1>>* H2);
#endif
#if defined(WEBRTC_ARCH_X86_FAMILY)
void ComputeFrequencyResponse_Sse2(
    size_t num_partitions,
    const std::vector<std::vector<FftData>>& H,
    std::vector<std::array<float, kFftLengthBy2Plus1>>* H2);

void ComputeFrequencyResponse_Avx2(
    size_t num_partitions,
    const std::vector<std::vector<FftData>>& H,
    std::vector<std::array<float, kFftLengthBy2Plus1>>* H2);
#endif

// Adapts the filter partitions.
void AdaptPartitions(const RenderBuffer& render_buffer,
                     const FftData& G,
                     size_t num_partitions,
                     std::vector<std::vector<FftData>>* H);
#if defined(WEBRTC_HAS_NEON)
void AdaptPartitions_Neon(const RenderBuffer& render_buffer,
                          const FftData& G,
                          size_t num_partitions,
                          std::vector<std::vector<FftData>>* H);
#endif
#if defined(WEBRTC_ARCH_X86_FAMILY)
void AdaptPartitions_Sse2(const RenderBuffer& render_buffer,
                          const FftData& G,
                          size_t num_partitions,
                          std::vector<std::vector<FftData>>* H);

void AdaptPartitions_Avx2(const RenderBuffer& render_buffer,
                          const FftData& G,
                          size_t num_partitions,
                          std::vector<std::vector<FftData>>* H);
#endif

// Produces the filter output.
void ApplyFilter(const RenderBuffer& render_buffer,
                 size_t num_partitions,
                 const std::vector<std::vector<FftData>>& H,
                 FftData* S);
#if defined(WEBRTC_HAS_NEON)
void ApplyFilter_Neon(const RenderBuffer& render_buffer,
                      size_t num_partitions,
                      const std::vector<std::vector<FftData>>& H,
                      FftData* S);
#endif
#if defined(WEBRTC_ARCH_X86_FAMILY)
void ApplyFilter_Sse2(const RenderBuffer& render_buffer,
                      size_t num_partitions,
                      const std::vector<std::vector<FftData>>& H,
                      FftData* S);

void ApplyFilter_Avx2(const RenderBuffer& render_buffer,
                      size_t num_partitions,
                      const std::vector<std::vector<FftData>>& H,
                      FftData* S);
#endif

}  // namespace aec3

// Provides a frequency domain adaptive filter functionality.
class AdaptiveFirFilter { … };

}  // namespace webrtc

#endif  // MODULES_AUDIO_PROCESSING_AEC3_ADAPTIVE_FIR_FILTER_H_