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2f2633d90c
Bug: webrtc:9193,chromium:836790 Change-Id: Ic162dd72947f1d075b55df6725a17b66c782930a Reviewed-on: https://webrtc-review.googlesource.com/73200 Reviewed-by: Per Åhgren <peah@webrtc.org> Commit-Queue: Jesus de Vicente Pena <devicentepena@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23075}
80 lines
2.5 KiB
C++
80 lines
2.5 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 "api/array_view.h"
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#include "api/optional.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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// 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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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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// 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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rtc::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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