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

/*
 *  Copyright (c) 2018 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/reverb_frequency_response.h"

#include <stddef.h>

#include <algorithm>
#include <array>
#include <numeric>

#include "api/array_view.h"
#include "modules/audio_processing/aec3/aec3_common.h"
#include "rtc_base/checks.h"

namespace webrtc {

namespace {

// Computes the ratio of the energies between the direct path and the tail. The
// energy is computed in the power spectrum domain discarding the DC
// contributions.
float AverageDecayWithinFilter(
    rtc::ArrayView<const float> freq_resp_direct_path,
    rtc::ArrayView<const float> freq_resp_tail) { … }

}  // namespace

ReverbFrequencyResponse::ReverbFrequencyResponse(
    bool use_conservative_tail_frequency_response)
    : … { … }

ReverbFrequencyResponse::~ReverbFrequencyResponse() = default;

void ReverbFrequencyResponse::Update(
    const std::vector<std::array<float, kFftLengthBy2Plus1>>&
        frequency_response,
    int filter_delay_blocks,
    const absl::optional<float>& linear_filter_quality,
    bool stationary_block) { … }

void ReverbFrequencyResponse::Update(
    const std::vector<std::array<float, kFftLengthBy2Plus1>>&
        frequency_response,
    int filter_delay_blocks,
    float linear_filter_quality) { … }

}  // namespace webrtc