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/*
* 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 MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_H_
#define MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_H_
#include <array>
#include <vector>
#include "api/audio/echo_canceller3_config.h"
#include "modules/audio_processing/aec3/aec3_common.h"
#include "modules/audio_processing/aec3/aec_state.h"
#include "modules/audio_processing/aec3/render_signal_analyzer.h"
#include "rtc_base/constructormagic.h"
namespace webrtc {
class SuppressionGain {
public:
SuppressionGain(const EchoCanceller3Config& config,
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,
const AecState& aec_state,
const std::vector<std::vector<float>>& render,
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,
bool saturating_echo_path,
bool initial_state,
bool linear_echo_estimate,
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;
const EchoCanceller3Config config_;
RTC_DISALLOW_COPY_AND_ASSIGN(SuppressionGain);
};
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_H_