histograms.h (1604B)
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_HISTOGRAMS_H_ 12 #define MODULES_AUDIO_PROCESSING_NS_HISTOGRAMS_H_ 13 14 #include <array> 15 16 #include "api/array_view.h" 17 #include "modules/audio_processing/ns/signal_model.h" 18 19 namespace webrtc { 20 21 constexpr int kHistogramSize = 1000; 22 23 // Class for handling the updating of histograms. 24 class Histograms { 25 public: 26 Histograms(); 27 Histograms(const Histograms&) = delete; 28 Histograms& operator=(const Histograms&) = delete; 29 30 // Clears the histograms. 31 void Clear(); 32 33 // Extracts thresholds for feature parameters and updates the corresponding 34 // histogram. 35 void Update(const SignalModel& features_); 36 37 // Methods for accessing the histograms. 38 ArrayView<const int, kHistogramSize> get_lrt() const { return lrt_; } 39 ArrayView<const int, kHistogramSize> get_spectral_flatness() const { 40 return spectral_flatness_; 41 } 42 ArrayView<const int, kHistogramSize> get_spectral_diff() const { 43 return spectral_diff_; 44 } 45 46 private: 47 std::array<int, kHistogramSize> lrt_; 48 std::array<int, kHistogramSize> spectral_flatness_; 49 std::array<int, kHistogramSize> spectral_diff_; 50 }; 51 52 } // namespace webrtc 53 54 #endif // MODULES_AUDIO_PROCESSING_NS_HISTOGRAMS_H_