mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
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62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
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/*
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* Copyright (C) 2015 Craig Shelley (craig@microtron.org.uk)
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* Copyright (C) 2016 Furrtek
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*
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* BCH Encoder/Decoder - Adapted from GNURadio
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*
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* This file is part of PortaPack.
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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, or (at your option)
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* 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; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __BCHCODE_H__
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#define __BCHCODE_H__
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#include <vector>
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class BCHCode {
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public:
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BCHCode(std::vector<int> p_init, int m, int n, int k, int t);
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~BCHCode();
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BCHCode(const BCHCode&) = delete;
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BCHCode(BCHCode&&) = delete;
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BCHCode& operator=(const BCHCode&) = delete;
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BCHCode& operator=(BCHCode&&) = delete;
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int * encode(int data[]);
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int decode(int recd[]);
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private:
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void gen_poly();
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void generate_gf();
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bool valid { false };
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int d { };
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int * p { }; // coefficients of primitive polynomial used to generate GF(2**5)
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int m { }; // order of the field GF(2**5) = 5
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int n { }; // 2**5 - 1 = 31
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int k { }; // n - deg(g(x)) = 21 = dimension
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int t { }; // 2 = error correcting capability
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int * alpha_to { }; // log table of GF(2**5)
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int * index_of { }; // antilog table of GF(2**5)
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int * g { }; // coefficients of generator polynomial, g(x) [n - k + 1]=[11]
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int * bb { }; // coefficients of redundancy polynomial ( x**(10) i(x) ) modulo g(x)
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};
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#endif/*__BCHCODE_H__*/
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