b5c48b97f6
Ongoing fixes and improvements, transient suppressor is gone. Also, dropping isac because it doesn't seem to be useful, and is just build system deadweight now. Upstream references: Version: 131.0.6778.200 WebRTC: 79aff54b0fa9238ce3518dd9eaf9610cd6f22e82 Chromium: 2a19506ad24af755f2a215a4c61f775393e0db42
113 lines
4.2 KiB
C++
113 lines
4.2 KiB
C++
/*
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* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_AEC3_ERLE_ESTIMATOR_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_ERLE_ESTIMATOR_H_
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#include <stddef.h>
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#include <array>
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#include <memory>
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#include <optional>
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#include <vector>
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#include "api/array_view.h"
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#include "api/audio/echo_canceller3_config.h"
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#include "modules/audio_processing/aec3/aec3_common.h"
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#include "modules/audio_processing/aec3/fullband_erle_estimator.h"
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#include "modules/audio_processing/aec3/render_buffer.h"
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#include "modules/audio_processing/aec3/signal_dependent_erle_estimator.h"
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#include "modules/audio_processing/aec3/subband_erle_estimator.h"
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#include "modules/audio_processing/logging/apm_data_dumper.h"
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namespace webrtc {
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// Estimates the echo return loss enhancement. One estimate is done per subband
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// and another one is done using the aggreation of energy over all the subbands.
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class ErleEstimator {
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public:
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ErleEstimator(size_t startup_phase_length_blocks,
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const EchoCanceller3Config& config,
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size_t num_capture_channels);
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~ErleEstimator();
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// Resets the fullband ERLE estimator and the subbands ERLE estimators.
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void Reset(bool delay_change);
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// Updates the ERLE estimates.
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void Update(
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const RenderBuffer& render_buffer,
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rtc::ArrayView<const std::vector<std::array<float, kFftLengthBy2Plus1>>>
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filter_frequency_responses,
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rtc::ArrayView<const float, kFftLengthBy2Plus1>
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avg_render_spectrum_with_reverb,
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
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capture_spectra,
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
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subtractor_spectra,
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const std::vector<bool>& converged_filters);
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// Returns the most recent subband ERLE estimates.
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> Erle(
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bool onset_compensated) const {
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return signal_dependent_erle_estimator_
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? signal_dependent_erle_estimator_->Erle(onset_compensated)
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: subband_erle_estimator_.Erle(onset_compensated);
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}
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// Returns the non-capped subband ERLE.
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> ErleUnbounded()
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const {
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// Unbounded ERLE is only used with the subband erle estimator where the
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// ERLE is often capped at low values. When the signal dependent ERLE
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// estimator is used the capped ERLE is returned.
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return !signal_dependent_erle_estimator_
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? subband_erle_estimator_.ErleUnbounded()
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: signal_dependent_erle_estimator_->Erle(
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/*onset_compensated=*/false);
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}
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// Returns the subband ERLE that are estimated during onsets (only used for
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// testing).
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> ErleDuringOnsets()
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const {
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return subband_erle_estimator_.ErleDuringOnsets();
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}
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// Returns the fullband ERLE estimate.
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float FullbandErleLog2() const {
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return fullband_erle_estimator_.FullbandErleLog2();
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}
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// Returns an estimation of the current linear filter quality based on the
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// current and past fullband ERLE estimates. The returned value is a float
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// vector with content between 0 and 1 where 1 indicates that, at this current
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// time instant, the linear filter is reaching its maximum subtraction
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// performance.
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rtc::ArrayView<const std::optional<float>> GetInstLinearQualityEstimates()
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const {
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return fullband_erle_estimator_.GetInstLinearQualityEstimates();
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}
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void Dump(const std::unique_ptr<ApmDataDumper>& data_dumper) const;
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private:
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const size_t startup_phase_length_blocks_;
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FullBandErleEstimator fullband_erle_estimator_;
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SubbandErleEstimator subband_erle_estimator_;
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std::unique_ptr<SignalDependentErleEstimator>
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signal_dependent_erle_estimator_;
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size_t blocks_since_reset_ = 0;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_ERLE_ESTIMATOR_H_
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