signal_model_estimator.h (2055B)
1 /* 2 * Copyright (c) 2019 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_NS_SIGNAL_MODEL_ESTIMATOR_H_ 12 #define MODULES_AUDIO_PROCESSING_NS_SIGNAL_MODEL_ESTIMATOR_H_ 13 14 #include <cstdint> 15 16 #include "api/array_view.h" 17 #include "modules/audio_processing/ns/histograms.h" 18 #include "modules/audio_processing/ns/ns_common.h" 19 #include "modules/audio_processing/ns/prior_signal_model.h" 20 #include "modules/audio_processing/ns/prior_signal_model_estimator.h" 21 #include "modules/audio_processing/ns/signal_model.h" 22 23 namespace webrtc { 24 25 class SignalModelEstimator { 26 public: 27 SignalModelEstimator(); 28 SignalModelEstimator(const SignalModelEstimator&) = delete; 29 SignalModelEstimator& operator=(const SignalModelEstimator&) = delete; 30 31 // Compute signal normalization during the initial startup phase. 32 void AdjustNormalization(int32_t num_analyzed_frames, float signal_energy); 33 34 void Update( 35 ArrayView<const float, kFftSizeBy2Plus1> prior_snr, 36 ArrayView<const float, kFftSizeBy2Plus1> post_snr, 37 ArrayView<const float, kFftSizeBy2Plus1> conservative_noise_spectrum, 38 ArrayView<const float, kFftSizeBy2Plus1> signal_spectrum, 39 float signal_spectral_sum, 40 float signal_energy); 41 42 const PriorSignalModel& get_prior_model() const { 43 return prior_model_estimator_.get_prior_model(); 44 } 45 const SignalModel& get_model() { return features_; } 46 47 private: 48 float diff_normalization_ = 0.f; 49 float signal_energy_sum_ = 0.f; 50 Histograms histograms_; 51 int histogram_analysis_counter_ = 500; 52 PriorSignalModelEstimator prior_model_estimator_; 53 SignalModel features_; 54 }; 55 56 } // namespace webrtc 57 58 #endif // MODULES_AUDIO_PROCESSING_NS_SIGNAL_MODEL_ESTIMATOR_H_