c98849cf92
In this CL we change the signal that controls the updates of the ERLE estimator. Until now, the render signal was used which is not optimum for reverberant signals. In this CL, a reverberation has been added to the the render signal and this new signal has been used for controlling when to update the ERLE estimator. Bug: webrtc:9873 Change-Id: I0ebea3fc208f97aa237af015ba543015d49ed978 Reviewed-on: https://webrtc-review.googlesource.com/c/105660 Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Commit-Queue: Jesus de Vicente Pena <devicentepena@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25285}
91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
/*
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* Copyright (c) 2018 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_ECHO_AUDIBILITY_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_ECHO_AUDIBILITY_H_
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#include <algorithm>
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#include <array>
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#include <limits>
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#include <memory>
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#include <vector>
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#include "absl/types/optional.h"
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#include "api/array_view.h"
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#include "modules/audio_processing/aec3/matrix_buffer.h"
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#include "modules/audio_processing/aec3/render_buffer.h"
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#include "modules/audio_processing/aec3/stationarity_estimator.h"
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#include "modules/audio_processing/aec3/vector_buffer.h"
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#include "rtc_base/constructormagic.h"
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namespace webrtc {
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class ApmDataDumper;
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class EchoAudibility {
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public:
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explicit EchoAudibility(bool use_render_stationarity_at_init);
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~EchoAudibility();
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// Feed new render data to the echo audibility estimator.
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void Update(const RenderBuffer& render_buffer,
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rtc::ArrayView<const float> render_reverb_contribution_spectrum,
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int delay_blocks,
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bool external_delay_seen);
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// Get the residual echo scaling.
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void GetResidualEchoScaling(bool filter_has_had_time_to_converge,
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rtc::ArrayView<float> residual_scaling) const {
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for (size_t band = 0; band < residual_scaling.size(); ++band) {
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if (render_stationarity_.IsBandStationary(band) &&
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filter_has_had_time_to_converge) {
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residual_scaling[band] = 0.f;
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} else {
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residual_scaling[band] = 1.0f;
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}
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}
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}
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// Returns true if the current render block is estimated as stationary.
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bool IsBlockStationary() const {
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return render_stationarity_.IsBlockStationary();
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}
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private:
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// Reset the EchoAudibility class.
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void Reset();
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// Updates the render stationarity flags for the current frame.
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void UpdateRenderStationarityFlags(
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const RenderBuffer& render_buffer,
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rtc::ArrayView<const float> render_reverb_contribution_spectrum,
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int delay_blocks);
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// Updates the noise estimator with the new render data since the previous
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// call to this method.
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void UpdateRenderNoiseEstimator(const VectorBuffer& spectrum_buffer,
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const MatrixBuffer& block_buffer,
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bool external_delay_seen);
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// Returns a bool being true if the render signal contains just close to zero
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// values.
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bool IsRenderTooLow(const MatrixBuffer& block_buffer);
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absl::optional<int> render_spectrum_write_prev_;
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int render_block_write_prev_;
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bool non_zero_render_seen_;
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const bool use_render_stationarity_at_init_;
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StationarityEstimator render_stationarity_;
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RTC_DISALLOW_COPY_AND_ASSIGN(EchoAudibility);
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_ECHO_AUDIBILITY_H_
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