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/*
* Copyright (c) 2019 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_NS_HISTOGRAMS_H_
#define MODULES_AUDIO_PROCESSING_NS_HISTOGRAMS_H_
#include <array>
#include "api/array_view.h"
#include "modules/audio_processing/ns/ns_common.h"
#include "modules/audio_processing/ns/signal_model.h"
namespace webrtc {
constexpr int kHistogramSize = 1000;
// Class for handling the updating of histograms.
class Histograms {
public:
Histograms();
Histograms(const Histograms&) = delete;
Histograms& operator=(const Histograms&) = delete;
// Clears the histograms.
void Clear();
// Extracts thresholds for feature parameters and updates the corresponding
// histogram.
void Update(const SignalModel& features_);
// Methods for accessing the histograms.
rtc::ArrayView<const int, kHistogramSize> get_lrt() const { return lrt_; }
rtc::ArrayView<const int, kHistogramSize> get_spectral_flatness() const {
return spectral_flatness_;
}
rtc::ArrayView<const int, kHistogramSize> get_spectral_diff() const {
return spectral_diff_;
}
private:
std::array<int, kHistogramSize> lrt_;
std::array<int, kHistogramSize> spectral_flatness_;
std::array<int, kHistogramSize> spectral_diff_;
};
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_NS_HISTOGRAMS_H_