MMDVMHost-Private/M17Convolution.h

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/*
* Copyright (C) 2015,2016,2018,2020 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.
*/
#if !defined(M17Convolution_H)
#define M17Convolution_H
#include <cstdint>
class CM17Convolution {
public:
CM17Convolution();
~CM17Convolution();
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void decodeLinkSetup(const unsigned char* in, unsigned char* out);
void decodeData(const unsigned char* in, unsigned char* out);
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void encodeLinkSetup(const unsigned char* in, unsigned char* out) const;
void encodeData(const unsigned char* in, unsigned char* out) const;
private:
uint16_t* m_metrics1;
uint16_t* m_metrics2;
uint16_t* m_oldMetrics;
uint16_t* m_newMetrics;
uint64_t* m_decisions;
uint64_t* m_dp;
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void start();
void decode(uint8_t s0, uint8_t s1);
void chainback(unsigned char* out, unsigned int nBits);
void encode(const unsigned char* in, unsigned char* out, unsigned int nBits) const;
};
#endif