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/*
* Copyright (C) 2015,2016,2018 by Jonathan Naylor G4KLX
*
* Copyright (C) 2018 by Edouard Griffiths F4EXB:
* - Cosmetic changes to integrate with DSDcc
*
* 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(NXDNConvolution_H)
#define NXDNConvolution_H
#include <stdint.h>
#include "export.h"
namespace DSDcc
{
class DSDCC_API CNXDNConvolution {
public:
CNXDNConvolution();
~CNXDNConvolution();
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;
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;
static const uint8_t BIT_MASK_TABLE[];
static const uint8_t BRANCH_TABLE1[];
static const uint8_t BRANCH_TABLE2[];
static const unsigned int NUM_OF_STATES_D2;
static const unsigned int NUM_OF_STATES;
static const uint32_t M;
static const unsigned int K;
};
} // namespace
#endif
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