chromium/third_party/webrtc/modules/audio_processing/aec3/subtractor.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/subtractor.h"

#include <algorithm>
#include <utility>

#include "api/array_view.h"
#include "modules/audio_processing/aec3/adaptive_fir_filter_erl.h"
#include "modules/audio_processing/aec3/fft_data.h"
#include "modules/audio_processing/logging/apm_data_dumper.h"
#include "rtc_base/checks.h"
#include "rtc_base/numerics/safe_minmax.h"
#include "system_wrappers/include/field_trial.h"

namespace webrtc {

namespace {

bool UseCoarseFilterResetHangover() { … }

void PredictionError(const Aec3Fft& fft,
                     const FftData& S,
                     rtc::ArrayView<const float> y,
                     std::array<float, kBlockSize>* e,
                     std::array<float, kBlockSize>* s) { … }

void ScaleFilterOutput(rtc::ArrayView<const float> y,
                       float factor,
                       rtc::ArrayView<float> e,
                       rtc::ArrayView<float> s) { … }

}  // namespace

Subtractor::Subtractor(const EchoCanceller3Config& config,
                       size_t num_render_channels,
                       size_t num_capture_channels,
                       ApmDataDumper* data_dumper,
                       Aec3Optimization optimization)
    : … { … }

Subtractor::~Subtractor() = default;

void Subtractor::HandleEchoPathChange(
    const EchoPathVariability& echo_path_variability) { … }

void Subtractor::ExitInitialState() { … }

void Subtractor::Process(const RenderBuffer& render_buffer,
                         const Block& capture,
                         const RenderSignalAnalyzer& render_signal_analyzer,
                         const AecState& aec_state,
                         rtc::ArrayView<SubtractorOutput> outputs) { … }

void Subtractor::FilterMisadjustmentEstimator::Update(
    const SubtractorOutput& output) { … }

void Subtractor::FilterMisadjustmentEstimator::Reset() { … }

void Subtractor::FilterMisadjustmentEstimator::Dump(
    ApmDataDumper* data_dumper) const { … }

}  // namespace webrtc