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52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
/*
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* Copyright (C) 2020,2021 by Jonathan Naylor G4KLX
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#if !defined(M17Convolution_H)
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#define M17Convolution_H
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#include <cstdint>
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class CM17Convolution {
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public:
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CM17Convolution();
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~CM17Convolution();
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unsigned int decodeLinkSetup(const uint8_t* in, uint8_t* out);
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unsigned int decodeData(const uint8_t* in, uint8_t* out);
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void encodeLinkSetup(const uint8_t* in, uint8_t* out) const;
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void encodeData(const uint8_t* in, uint8_t* out) const;
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private:
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uint16_t* m_metrics1;
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uint16_t* m_metrics2;
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uint16_t* m_oldMetrics;
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uint16_t* m_newMetrics;
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uint64_t* m_decisions;
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uint64_t* m_dp;
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void start();
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void decode(uint8_t s0, uint8_t s1);
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unsigned int chainback(uint8_t* out, uint32_t nBits);
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void encode(const uint8_t* in, uint8_t* out, uint32_t nBits) const;
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};
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#endif
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