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/*
* 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/erle_estimator.h"
#include "modules/audio_processing/aec3/aec3_common.h"
#include "rtc_base/checks.h"
namespace webrtc {
ErleEstimator::ErleEstimator(size_t startup_phase_length_blocks,
const EchoCanceller3Config& config,
size_t num_capture_channels)
: startup_phase_length_blocks_(startup_phase_length_blocks),
fullband_erle_estimator_(config.erle, num_capture_channels),
subband_erle_estimator_(config, num_capture_channels) {
if (config.erle.num_sections > 1) {
signal_dependent_erle_estimator_ =
std::make_unique<SignalDependentErleEstimator>(config,
num_capture_channels);
}
Reset(true);
}
ErleEstimator::~ErleEstimator() = default;
void ErleEstimator::Reset(bool delay_change) {
fullband_erle_estimator_.Reset();
subband_erle_estimator_.Reset();
if (signal_dependent_erle_estimator_) {
signal_dependent_erle_estimator_->Reset();
}
if (delay_change) {
blocks_since_reset_ = 0;
}
}
void ErleEstimator::Update(
const RenderBuffer& render_buffer,
rtc::ArrayView<const std::vector<std::array<float, kFftLengthBy2Plus1>>>
filter_frequency_responses,
rtc::ArrayView<const float, kFftLengthBy2Plus1>
avg_render_spectrum_with_reverb,
rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> capture_spectra,
rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
subtractor_spectra,
const std::vector<bool>& converged_filters) {
RTC_DCHECK_EQ(subband_erle_estimator_.Erle(/*onset_compensated=*/true).size(),
capture_spectra.size());
RTC_DCHECK_EQ(subband_erle_estimator_.Erle(/*onset_compensated=*/true).size(),
subtractor_spectra.size());
const auto& X2_reverb = avg_render_spectrum_with_reverb;
const auto& Y2 = capture_spectra;
const auto& E2 = subtractor_spectra;
if (++blocks_since_reset_ < startup_phase_length_blocks_) {
return;
}
subband_erle_estimator_.Update(X2_reverb, Y2, E2, converged_filters);
if (signal_dependent_erle_estimator_) {
signal_dependent_erle_estimator_->Update(
render_buffer, filter_frequency_responses, X2_reverb, Y2, E2,
subband_erle_estimator_.Erle(/*onset_compensated=*/false),
subband_erle_estimator_.Erle(/*onset_compensated=*/true),
converged_filters);
}
fullband_erle_estimator_.Update(X2_reverb, Y2, E2, converged_filters);
}
void ErleEstimator::Dump(
const std::unique_ptr<ApmDataDumper>& data_dumper) const {
fullband_erle_estimator_.Dump(data_dumper);
subband_erle_estimator_.Dump(data_dumper);
if (signal_dependent_erle_estimator_) {
signal_dependent_erle_estimator_->Dump(data_dumper);
}
}
} // namespace webrtc