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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.
*/
#include "modules/audio_processing/ns/histograms.h"
namespace webrtc {
Histograms::Histograms() {
Clear();
}
void Histograms::Clear() {
lrt_.fill(0);
spectral_flatness_.fill(0);
spectral_diff_.fill(0);
}
void Histograms::Update(const SignalModel& features_) {
// Update the histogram for the LRT.
constexpr float kOneByBinSizeLrt = 1.f / kBinSizeLrt;
if (features_.lrt < kHistogramSize * kBinSizeLrt && features_.lrt >= 0.f) {
++lrt_[kOneByBinSizeLrt * features_.lrt];
}
// Update histogram for the spectral flatness.
constexpr float kOneByBinSizeSpecFlat = 1.f / kBinSizeSpecFlat;
if (features_.spectral_flatness < kHistogramSize * kBinSizeSpecFlat &&
features_.spectral_flatness >= 0.f) {
++spectral_flatness_[features_.spectral_flatness * kOneByBinSizeSpecFlat];
}
// Update histogram for the spectral difference.
constexpr float kOneByBinSizeSpecDiff = 1.f / kBinSizeSpecDiff;
if (features_.spectral_diff < kHistogramSize * kBinSizeSpecDiff &&
features_.spectral_diff >= 0.f) {
++spectral_diff_[features_.spectral_diff * kOneByBinSizeSpecDiff];
}
}
} // namespace webrtc