14c11a4712
This CL adds detection of components in the render signal that are of strong narrowband nature and therefore may cause problems for the AEC. This CL also adds functionality in the echo suppressor to suppress these signals BUG=webrtc:7967 Review-Url: https://codereview.webrtc.org/2980493002 Cr-Commit-Position: refs/heads/master@{#18968}
67 lines
2.5 KiB
C++
67 lines
2.5 KiB
C++
/*
|
|
* Copyright (c) 2017 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 WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_H_
|
|
#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_H_
|
|
|
|
#include <array>
|
|
#include <vector>
|
|
|
|
#include "webrtc/modules/audio_processing/aec3/aec3_common.h"
|
|
#include "webrtc/modules/audio_processing/aec3/render_signal_analyzer.h"
|
|
#include "webrtc/rtc_base/constructormagic.h"
|
|
|
|
namespace webrtc {
|
|
|
|
class SuppressionGain {
|
|
public:
|
|
explicit SuppressionGain(Aec3Optimization optimization);
|
|
void GetGain(const std::array<float, kFftLengthBy2Plus1>& nearend,
|
|
const std::array<float, kFftLengthBy2Plus1>& echo,
|
|
const std::array<float, kFftLengthBy2Plus1>& comfort_noise,
|
|
const RenderSignalAnalyzer& render_signal_analyzer,
|
|
bool saturated_echo,
|
|
const std::vector<std::vector<float>>& render,
|
|
bool force_zero_gain,
|
|
float* high_bands_gain,
|
|
std::array<float, kFftLengthBy2Plus1>* low_band_gain);
|
|
|
|
private:
|
|
void LowerBandGain(bool stationary_with_low_power,
|
|
const rtc::Optional<int>& narrow_peak_band,
|
|
bool saturated_echo,
|
|
const std::array<float, kFftLengthBy2Plus1>& nearend,
|
|
const std::array<float, kFftLengthBy2Plus1>& echo,
|
|
const std::array<float, kFftLengthBy2Plus1>& comfort_noise,
|
|
std::array<float, kFftLengthBy2Plus1>* gain);
|
|
|
|
class LowNoiseRenderDetector {
|
|
public:
|
|
bool Detect(const std::vector<std::vector<float>>& render);
|
|
|
|
private:
|
|
float average_power_ = 32768.f * 32768.f;
|
|
};
|
|
|
|
const Aec3Optimization optimization_;
|
|
std::array<float, kFftLengthBy2Plus1> last_gain_;
|
|
std::array<float, kFftLengthBy2Plus1> last_masker_;
|
|
std::array<float, kFftLengthBy2Plus1> gain_increase_;
|
|
std::array<float, kFftLengthBy2Plus1> last_echo_;
|
|
|
|
LowNoiseRenderDetector low_render_detector_;
|
|
size_t no_saturation_counter_ = 0;
|
|
RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(SuppressionGain);
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_H_
|