47 lines
1.4 KiB
C++
47 lines
1.4 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_QUANTILE_NOISE_ESTIMATOR_H_
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#define MODULES_AUDIO_PROCESSING_NS_QUANTILE_NOISE_ESTIMATOR_H_
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#include <math.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/ns_common.h"
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namespace webrtc {
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constexpr int kSimult = 3;
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// For quantile noise estimation.
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class QuantileNoiseEstimator {
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public:
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QuantileNoiseEstimator();
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QuantileNoiseEstimator(const QuantileNoiseEstimator&) = delete;
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QuantileNoiseEstimator& operator=(const QuantileNoiseEstimator&) = delete;
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// Estimate noise.
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void Estimate(rtc::ArrayView<const float, kFftSizeBy2Plus1> signal_spectrum,
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rtc::ArrayView<float, kFftSizeBy2Plus1> noise_spectrum);
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private:
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std::array<float, kSimult * kFftSizeBy2Plus1> density_;
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std::array<float, kSimult * kFftSizeBy2Plus1> log_quantile_;
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std::array<float, kFftSizeBy2Plus1> quantile_;
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std::array<int, kSimult> counter_;
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int num_updates_ = 1;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_NS_QUANTILE_NOISE_ESTIMATOR_H_
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