mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-14 22:30:40 +01:00
8718afb283
This CL corrects the EchoAudibility and StationarityEstimator code to work properly with multiple channels. It also changes the naming of the FilterDelayBlocks() method to better reflect what it does. The changes have been verified to be bitexact over a large number of recordings. Bug: webrtc:10913 Change-Id: I070b531efcdff4c33f70fd5b37fbb556dcebe5b4 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/156565 Reviewed-by: Sam Zackrisson <saza@webrtc.org> Commit-Queue: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29482}
86 lines
3.1 KiB
C++
86 lines
3.1 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 <stddef.h>
|
|
|
|
#include "absl/types/optional.h"
|
|
#include "api/array_view.h"
|
|
#include "modules/audio_processing/aec3/block_buffer.h"
|
|
#include "modules/audio_processing/aec3/render_buffer.h"
|
|
#include "modules/audio_processing/aec3/spectrum_buffer.h"
|
|
#include "modules/audio_processing/aec3/stationarity_estimator.h"
|
|
#include "rtc_base/constructor_magic.h"
|
|
|
|
namespace webrtc {
|
|
|
|
class EchoAudibility {
|
|
public:
|
|
explicit EchoAudibility(bool use_render_stationarity_at_init);
|
|
~EchoAudibility();
|
|
|
|
EchoAudibility(const EchoAudibility&) = delete;
|
|
EchoAudibility& operator=(const EchoAudibility&) = delete;
|
|
|
|
// Feed new render data to the echo audibility estimator.
|
|
void Update(const RenderBuffer& render_buffer,
|
|
rtc::ArrayView<const float> average_reverb,
|
|
int min_channel_delay_blocks,
|
|
bool external_delay_seen);
|
|
// 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 ||
|
|
use_render_stationarity_at_init_)) {
|
|
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,
|
|
rtc::ArrayView<const float> average_reverb,
|
|
int delay_blocks);
|
|
|
|
// Updates the noise estimator with the new render data since the previous
|
|
// call to this method.
|
|
void UpdateRenderNoiseEstimator(const SpectrumBuffer& spectrum_buffer,
|
|
const BlockBuffer& block_buffer,
|
|
bool external_delay_seen);
|
|
|
|
// Returns a bool being true if the render signal contains just close to zero
|
|
// values.
|
|
bool IsRenderTooLow(const BlockBuffer& 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_;
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // MODULES_AUDIO_PROCESSING_AEC3_ECHO_AUDIBILITY_H_
|