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/*
* Copyright (c) 2018 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_AGC2_RNN_VAD_PITCH_SEARCH_H_
#define MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_PITCH_SEARCH_H_
#include <memory>
#include <vector>
#include "api/array_view.h"
#include "modules/audio_processing/agc2/cpu_features.h"
#include "modules/audio_processing/agc2/rnn_vad/auto_correlation.h"
#include "modules/audio_processing/agc2/rnn_vad/common.h"
#include "modules/audio_processing/agc2/rnn_vad/pitch_search_internal.h"
#include "rtc_base/gtest_prod_util.h"
namespace webrtc {
namespace rnn_vad {
// Pitch estimator.
class PitchEstimator {
public:
explicit PitchEstimator(const AvailableCpuFeatures& cpu_features);
PitchEstimator(const PitchEstimator&) = delete;
PitchEstimator& operator=(const PitchEstimator&) = delete;
~PitchEstimator();
// Returns the estimated pitch period at 48 kHz.
int Estimate(rtc::ArrayView<const float, kBufSize24kHz> pitch_buffer);
private:
FRIEND_TEST_ALL_PREFIXES(RnnVadTest, PitchSearchWithinTolerance);
float GetLastPitchStrengthForTesting() const {
return last_pitch_48kHz_.strength;
}
const AvailableCpuFeatures cpu_features_;
PitchInfo last_pitch_48kHz_{};
AutoCorrelationCalculator auto_corr_calculator_;
std::vector<float> y_energy_24kHz_;
std::vector<float> pitch_buffer_12kHz_;
std::vector<float> auto_correlation_12kHz_;
};
} // namespace rnn_vad
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_PITCH_SEARCH_H_