portapack-mayhem/firmware/baseband/dsp_goertzel.hpp
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/*
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
* Copyright (C) 2018 Furrtek
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef __DSP_GOERTZEL_H__
#define __DSP_GOERTZEL_H__
#include "dsp_types.hpp"
namespace dsp {
class GoertzelDetector {
public:
GoertzelDetector(const float frequency, const uint32_t sample_rate);
float execute(const buffer_s16_t& src);
private:
float coefficient{};
int16_t s[2]{0};
};
} /* namespace dsp */
#endif /*__DSP_GOERTZEL_H__*/