1 /* 2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_H_ 12 #define MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_H_ 13 14 #include <array> 15 #include <vector> 16 17 #include "modules/audio_processing/aec3/aec3_common.h" 18 #include "modules/audio_processing/aec3/aec_state.h" 19 #include "modules/audio_processing/aec3/render_signal_analyzer.h" 20 #include "modules/audio_processing/include/audio_processing.h" 21 #include "rtc_base/constructormagic.h" 22 23 namespace webrtc { 24 25 class SuppressionGain { 26 public: 27 SuppressionGain(const EchoCanceller3Config& config, 28 Aec3Optimization optimization); 29 void GetGain(const std::array<float, kFftLengthBy2Plus1>& nearend, 30 const std::array<float, kFftLengthBy2Plus1>& echo, 31 const std::array<float, kFftLengthBy2Plus1>& comfort_noise, 32 const RenderSignalAnalyzer& render_signal_analyzer, 33 const AecState& aec_state, 34 const std::vector<std::vector<float>>& render, 35 float* high_bands_gain, 36 std::array<float, kFftLengthBy2Plus1>* low_band_gain); 37 38 private: 39 void LowerBandGain(bool stationary_with_low_power, 40 const rtc::Optional<int>& narrow_peak_band, 41 bool saturated_echo, 42 bool saturating_echo_path, 43 bool linear_echo_estimate, 44 const std::array<float, kFftLengthBy2Plus1>& nearend, 45 const std::array<float, kFftLengthBy2Plus1>& echo, 46 const std::array<float, kFftLengthBy2Plus1>& comfort_noise, 47 std::array<float, kFftLengthBy2Plus1>* gain); 48 49 class LowNoiseRenderDetector { 50 public: 51 bool Detect(const std::vector<std::vector<float>>& render); 52 53 private: 54 float average_power_ = 32768.f * 32768.f; 55 }; 56 57 const Aec3Optimization optimization_; 58 std::array<float, kFftLengthBy2Plus1> last_gain_; 59 std::array<float, kFftLengthBy2Plus1> last_masker_; 60 std::array<float, kFftLengthBy2Plus1> gain_increase_; 61 std::array<float, kFftLengthBy2Plus1> last_echo_; 62 63 LowNoiseRenderDetector low_render_detector_; 64 size_t no_saturation_counter_ = 0; 65 const EchoCanceller3Config config_; 66 RTC_DISALLOW_COPY_AND_ASSIGN(SuppressionGain); 67 }; 68 69 } // namespace webrtc 70 71 #endif // MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_GAIN_H_ 72