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AX25Twist.h
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AX25Twist.h
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/*
* Copyright (C) 2020 by Jonathan Naylor G4KLX
*
* 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 of the License, 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; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "Config.h"
#if defined(MODE_AX25)
#if !defined(AX25Twist_H)
#define AX25Twist_H
class CAX25Twist {
public:
CAX25Twist(int8_t n);
void process(q15_t* in, q15_t* out, uint8_t length);
void setTwist(int8_t n);
private:
arm_fir_instance_q15 m_filter;
q15_t m_state[40U]; // NoTaps + BlockSize - 1, 9 + 20 - 1 plus some spare
};
#endif
#endif