mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-13 03:34:35 +00:00
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
/*
|
|
* Copyright (C) 2015 Craig Shelley (craig@microtron.org.uk)
|
|
* Copyright (C) 2016 Furrtek
|
|
*
|
|
* BCH Encoder/Decoder - Adapted from GNURadio
|
|
*
|
|
* This file is part of PortaPack.
|
|
*
|
|
* 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, 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; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef __BCHCODE_H__
|
|
#define __BCHCODE_H__
|
|
|
|
#include <vector>
|
|
|
|
class BCHCode {
|
|
public:
|
|
BCHCode(std::vector<int> p_init, int m, int n, int k, int t);
|
|
~BCHCode();
|
|
|
|
BCHCode(const BCHCode&) = delete;
|
|
BCHCode(BCHCode&&) = delete;
|
|
BCHCode& operator=(const BCHCode&) = delete;
|
|
BCHCode& operator=(BCHCode&&) = delete;
|
|
|
|
int * encode(int data[]);
|
|
int decode(int recd[]);
|
|
|
|
private:
|
|
void gen_poly();
|
|
void generate_gf();
|
|
|
|
bool valid { false };
|
|
|
|
int d { };
|
|
int * p { }; // coefficients of primitive polynomial used to generate GF(2**5)
|
|
int m { }; // order of the field GF(2**5) = 5
|
|
int n { }; // 2**5 - 1 = 31
|
|
int k { }; // n - deg(g(x)) = 21 = dimension
|
|
int t { }; // 2 = error correcting capability
|
|
int * alpha_to { }; // log table of GF(2**5)
|
|
int * index_of { }; // antilog table of GF(2**5)
|
|
int * g { }; // coefficients of generator polynomial, g(x) [n - k + 1]=[11]
|
|
int * bb { }; // coefficients of redundancy polynomial ( x**(10) i(x) ) modulo g(x)
|
|
};
|
|
|
|
#endif/*__BCHCODE_H__*/
|