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Diffstat (limited to 'third_party/libwebrtc/modules/audio_processing/ns/speech_probability_estimator.h')
-rw-r--r-- | third_party/libwebrtc/modules/audio_processing/ns/speech_probability_estimator.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_processing/ns/speech_probability_estimator.h b/third_party/libwebrtc/modules/audio_processing/ns/speech_probability_estimator.h new file mode 100644 index 0000000000..259c3b6776 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_processing/ns/speech_probability_estimator.h @@ -0,0 +1,51 @@ +/* + * 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_SPEECH_PROBABILITY_ESTIMATOR_H_ +#define MODULES_AUDIO_PROCESSING_NS_SPEECH_PROBABILITY_ESTIMATOR_H_ + +#include <array> + +#include "api/array_view.h" +#include "modules/audio_processing/ns/ns_common.h" +#include "modules/audio_processing/ns/signal_model_estimator.h" + +namespace webrtc { + +// Class for estimating the probability of speech. +class SpeechProbabilityEstimator { + public: + SpeechProbabilityEstimator(); + SpeechProbabilityEstimator(const SpeechProbabilityEstimator&) = delete; + SpeechProbabilityEstimator& operator=(const SpeechProbabilityEstimator&) = + delete; + + // Compute speech probability. + void Update( + int32_t num_analyzed_frames, + rtc::ArrayView<const float, kFftSizeBy2Plus1> prior_snr, + rtc::ArrayView<const float, kFftSizeBy2Plus1> post_snr, + rtc::ArrayView<const float, kFftSizeBy2Plus1> conservative_noise_spectrum, + rtc::ArrayView<const float, kFftSizeBy2Plus1> signal_spectrum, + float signal_spectral_sum, + float signal_energy); + + float get_prior_probability() const { return prior_speech_prob_; } + rtc::ArrayView<const float> get_probability() { return speech_probability_; } + + private: + SignalModelEstimator signal_model_estimator_; + float prior_speech_prob_ = .5f; + std::array<float, kFftSizeBy2Plus1> speech_probability_; +}; + +} // namespace webrtc + +#endif // MODULES_AUDIO_PROCESSING_NS_SPEECH_PROBABILITY_ESTIMATOR_H_ |