59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
/*
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* Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_NS_SIGNAL_MODEL_ESTIMATOR_H_
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#define MODULES_AUDIO_PROCESSING_NS_SIGNAL_MODEL_ESTIMATOR_H_
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#include <array>
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#include "api/array_view.h"
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#include "modules/audio_processing/ns/histograms.h"
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#include "modules/audio_processing/ns/ns_common.h"
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#include "modules/audio_processing/ns/prior_signal_model.h"
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#include "modules/audio_processing/ns/prior_signal_model_estimator.h"
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#include "modules/audio_processing/ns/signal_model.h"
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namespace webrtc {
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class SignalModelEstimator {
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public:
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SignalModelEstimator();
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SignalModelEstimator(const SignalModelEstimator&) = delete;
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SignalModelEstimator& operator=(const SignalModelEstimator&) = delete;
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// Compute signal normalization during the initial startup phase.
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void AdjustNormalization(int32_t num_analyzed_frames, float signal_energy);
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void Update(
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rtc::ArrayView<const float, kFftSizeBy2Plus1> prior_snr,
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rtc::ArrayView<const float, kFftSizeBy2Plus1> post_snr,
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rtc::ArrayView<const float, kFftSizeBy2Plus1> conservative_noise_spectrum,
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rtc::ArrayView<const float, kFftSizeBy2Plus1> signal_spectrum,
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float signal_spectral_sum,
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float signal_energy);
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const PriorSignalModel& get_prior_model() const {
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return prior_model_estimator_.get_prior_model();
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}
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const SignalModel& get_model() { return features_; }
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private:
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float diff_normalization_ = 0.f;
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float signal_energy_sum_ = 0.f;
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Histograms histograms_;
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int histogram_analysis_counter_ = 500;
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PriorSignalModelEstimator prior_model_estimator_;
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SignalModel features_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_NS_SIGNAL_MODEL_ESTIMATOR_H_
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