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496cedfe56
In this CL we have introduced changes on the estimation of the decay involved in the exponential modeling of the reverberation. Specifically, the instantaneous ERLE has been tracked and used for adapting faster in the regions when the linear filter is performing well. Furthermore, the adaptation is just perform during render activity. Change-Id: I974fd60e4e1a40a879660efaa24457ed940f77b4 Bug: webrtc:9479 Reviewed-on: https://webrtc-review.googlesource.com/86680 Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Commit-Queue: Jesus de Vicente Pena <devicentepena@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23836}
87 lines
2.8 KiB
C++
87 lines
2.8 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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EchoAudibility();
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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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int delay_blocks,
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bool external_delay_seen,
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float reverb_decay);
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// Get the residual echo scaling.
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void GetResidualEchoScaling(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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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(const RenderBuffer& render_buffer,
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int delay_blocks,
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float reverb_decay);
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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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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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