mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-18 16:17:50 +01:00
b2d7116733
This CL adjusts the behavior of the AEC3 echo suppressor behavior initially in the call, and when there has been delay changes. The results is that short echo blips/bursts present in some such cases no longer occur. In particular this CL: -Ensures that the suppressor back-off under stationary render conditions does not occur until the linear filter has had the ability to converge. -Ensures that a previously converged filter behavior detection is not sticky for stable and linear echo paths, which in turn prevents echo leakage due to the more liberal echo suppressor behavior applied on such platforms. -Removes a bug that caused a random and jittery behavior for the usage of the linear filter output initially in the calls and after echo path changes Bug: webrtc:9737, chromium:882396 Change-Id: Id2b46e366dc58ab8137f19ed59a2034c89ca3087 Reviewed-on: https://webrtc-review.googlesource.com/99063 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Jesus de Vicente Pena <devicentepena@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24656}
89 lines
3 KiB
C++
89 lines
3 KiB
C++
/*
|
|
* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#ifndef MODULES_AUDIO_PROCESSING_AEC3_ECHO_AUDIBILITY_H_
|
|
#define MODULES_AUDIO_PROCESSING_AEC3_ECHO_AUDIBILITY_H_
|
|
|
|
#include <algorithm>
|
|
#include <array>
|
|
#include <limits>
|
|
#include <memory>
|
|
#include <vector>
|
|
|
|
#include "absl/types/optional.h"
|
|
#include "api/array_view.h"
|
|
#include "modules/audio_processing/aec3/matrix_buffer.h"
|
|
#include "modules/audio_processing/aec3/render_buffer.h"
|
|
#include "modules/audio_processing/aec3/stationarity_estimator.h"
|
|
#include "modules/audio_processing/aec3/vector_buffer.h"
|
|
#include "rtc_base/constructormagic.h"
|
|
|
|
namespace webrtc {
|
|
|
|
class ApmDataDumper;
|
|
|
|
class EchoAudibility {
|
|
public:
|
|
explicit EchoAudibility(bool use_render_stationarity_at_init);
|
|
~EchoAudibility();
|
|
|
|
// Feed new render data to the echo audibility estimator.
|
|
void Update(const RenderBuffer& render_buffer,
|
|
int delay_blocks,
|
|
bool external_delay_seen,
|
|
float reverb_decay);
|
|
// Get the residual echo scaling.
|
|
void GetResidualEchoScaling(bool filter_has_had_time_to_converge,
|
|
rtc::ArrayView<float> residual_scaling) const {
|
|
for (size_t band = 0; band < residual_scaling.size(); ++band) {
|
|
if (render_stationarity_.IsBandStationary(band) &&
|
|
filter_has_had_time_to_converge) {
|
|
residual_scaling[band] = 0.f;
|
|
} else {
|
|
residual_scaling[band] = 1.0f;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Returns true if the current render block is estimated as stationary.
|
|
bool IsBlockStationary() const {
|
|
return render_stationarity_.IsBlockStationary();
|
|
}
|
|
|
|
private:
|
|
// Reset the EchoAudibility class.
|
|
void Reset();
|
|
|
|
// Updates the render stationarity flags for the current frame.
|
|
void UpdateRenderStationarityFlags(const RenderBuffer& render_buffer,
|
|
int delay_blocks,
|
|
float reverb_decay);
|
|
|
|
// Updates the noise estimator with the new render data since the previous
|
|
// call to this method.
|
|
void UpdateRenderNoiseEstimator(const VectorBuffer& spectrum_buffer,
|
|
const MatrixBuffer& block_buffer,
|
|
bool external_delay_seen);
|
|
|
|
// Returns a bool being true if the render signal contains just close to zero
|
|
// values.
|
|
bool IsRenderTooLow(const MatrixBuffer& block_buffer);
|
|
|
|
absl::optional<int> render_spectrum_write_prev_;
|
|
int render_block_write_prev_;
|
|
bool non_zero_render_seen_;
|
|
const bool use_render_stationarity_at_init_;
|
|
StationarityEstimator render_stationarity_;
|
|
RTC_DISALLOW_COPY_AND_ASSIGN(EchoAudibility);
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // MODULES_AUDIO_PROCESSING_AEC3_ECHO_AUDIBILITY_H_
|