beb1d34729
This CL finalizes the feature extraction part for the RNN VAD adding a class that combines a high-pass filter, LP residual computation, pitch estimation and spectral features extraction. This CL also includes a minor refactoring of the pitch estimation library. Bug: webrtc:9076 Change-Id: I918b9e143bc6dd2bf508a891446067258a68a777 Reviewed-on: https://webrtc-review.googlesource.com/75504 Commit-Queue: Alessio Bazzica <alessiob@webrtc.org> Reviewed-by: Alex Loiko <aleloi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23235}
50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
/*
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* Copyright (c) 2018 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_AGC2_RNN_VAD_PITCH_SEARCH_H_
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#define MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_PITCH_SEARCH_H_
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#include <memory>
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#include <vector>
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#include "api/array_view.h"
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#include "common_audio/real_fourier.h"
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#include "modules/audio_processing/agc2/rnn_vad/common.h"
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#include "modules/audio_processing/agc2/rnn_vad/pitch_info.h"
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#include "modules/audio_processing/agc2/rnn_vad/pitch_search_internal.h"
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namespace webrtc {
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namespace rnn_vad {
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// Pitch estimator.
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class PitchEstimator {
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public:
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PitchEstimator();
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PitchEstimator(const PitchEstimator&) = delete;
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PitchEstimator& operator=(const PitchEstimator&) = delete;
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~PitchEstimator();
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// Estimates the pitch period and gain. Returns the pitch estimation data for
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// 48 kHz.
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PitchInfo Estimate(rtc::ArrayView<const float, kBufSize24kHz> pitch_buf);
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private:
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PitchInfo last_pitch_48kHz_;
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std::unique_ptr<RealFourier> fft_;
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std::vector<float> pitch_buf_decimated_;
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rtc::ArrayView<float, kBufSize12kHz> pitch_buf_decimated_view_;
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std::vector<float> auto_corr_;
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rtc::ArrayView<float, kNumInvertedLags12kHz> auto_corr_view_;
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};
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} // namespace rnn_vad
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_PITCH_SEARCH_H_
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