8be669fd96
This CL adds support for multiple channels in the reverb modelling. As a side effect, it also partly adds multi-channel supports for the sections of the code. Beyond adding the multi-channel support, a bug is fixed as part of this CL. Since the bug fix affects the bitexactness, as a safety precaution the CL includes the ability to override the bugfix. Apart from the contributions from the bugfix, the changes have been verified to be bitexact for a large set of mono recordings. Bug: webrtc:10913 Change-Id: I1f307b532be85ef4182f8db41384f44d40a25219 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/156382 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Sam Zackrisson <saza@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29456}
94 lines
3.5 KiB
C++
94 lines
3.5 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 "absl/types/optional.h"
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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(const RenderBuffer& render_buffer,
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const std::vector<std::array<float, kFftLengthBy2Plus1>>&
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filter_frequency_response,
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rtc::ArrayView<const float> reverb_render_spectrum,
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rtc::ArrayView<const float> capture_spectrum,
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rtc::ArrayView<const float> subtractor_spectrum,
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bool converged_filter,
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bool onset_detection);
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// Returns the most recent subband ERLE estimates.
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rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> Erle() const {
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return use_signal_dependent_erle_ ? signal_dependent_erle_estimator_.Erle()
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: subband_erle_estimator_.Erle();
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}
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// Returns the subband ERLE that are estimated during onsets. Used
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// for logging/testing.
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rtc::ArrayView<const float> ErleOnsets() const {
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return subband_erle_estimator_.ErleOnsets();
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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 absl::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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const bool use_signal_dependent_erle_;
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FullBandErleEstimator fullband_erle_estimator_;
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SubbandErleEstimator subband_erle_estimator_;
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SignalDependentErleEstimator 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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