44 lines
1.8 KiB
C
44 lines
1.8 KiB
C
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/*
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* Copyright (C) 2016,2018 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; version 2 of the License.
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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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#ifndef P25Trellis_H
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#define P25Trellis_H
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class CP25Trellis {
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public:
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CP25Trellis();
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~CP25Trellis();
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bool decode34(const unsigned char* data, unsigned char* payload);
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void encode34(const unsigned char* payload, unsigned char* data);
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bool decode12(const unsigned char* data, unsigned char* payload);
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void encode12(const unsigned char* payload, unsigned char* data);
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private:
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void deinterleave(const unsigned char* in, signed char* dibits) const;
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void interleave(const signed char* dibits, unsigned char* out) const;
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void dibitsToPoints(const signed char* dibits, unsigned char* points) const;
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void pointsToDibits(const unsigned char* points, signed char* dibits) const;
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void bitsToTribits(const unsigned char* payload, unsigned char* tribits) const;
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void bitsToDibits(const unsigned char* payload, unsigned char* dibits) const;
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void tribitsToBits(const unsigned char* tribits, unsigned char* payload) const;
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void dibitsToBits(const unsigned char* dibits, unsigned char* payload) const;
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bool fixCode34(unsigned char* points, unsigned int failPos, unsigned char* payload) const;
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unsigned int checkCode34(const unsigned char* points, unsigned char* tribits) const;
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bool fixCode12(unsigned char* points, unsigned int failPos, unsigned char* payload) const;
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unsigned int checkCode12(const unsigned char* points, unsigned char* dibits) const;
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};
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#endif
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