/usr/include/itpp/comm/reedsolomon.h is in libitpp-dev 4.2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 | /*!
* \file
* \brief Definitions of a Reed-Solomon codec class
* \author Pal Frenger, Steve Peters and Adam Piatyszek
*
* -------------------------------------------------------------------------
*
* Copyright (C) 1995-2010 (see AUTHORS file for a list of contributors)
*
* This file is part of IT++ - a C++ library of mathematical, signal
* processing, speech processing, and communications classes and functions.
*
* IT++ 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 3 of the License, or (at your option) any
* later version.
*
* IT++ 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 IT++. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef REEDSOLOMON_H
#define REEDSOLOMON_H
#include <itpp/base/vec.h>
#include <itpp/comm/galois.h>
#include <itpp/comm/channel_code.h>
namespace itpp
{
//---------------------- Reed-Solomon --------------------------------------
/*!
\ingroup fec
\brief Reed-Solomon Codes.
Uses the Berlkamp-Massey algorithm for decoding as described in: S. B. Wicker,
"Error Control Systems for digital communication and storage," Prentice Hall.
The code is \f$2^m\f$ - ary of length \f$2^m-1\f$ capable of correcting \f$t\f$ errors.
*/
class Reed_Solomon : public Channel_Code
{
public:
//! Class constructor for the \f$2^m\f$ - ary, \f$t\f$ error correcting RS-code.
Reed_Solomon(int in_m, int in_t, bool sys = false);
//! Destructor
virtual ~Reed_Solomon() { }
//! Encoder function.
virtual void encode(const bvec &uncoded_bits, bvec &coded_bits);
//! Encoder function.
virtual bvec encode(const bvec &uncoded_bits);
//! Decoder function
virtual void decode(const bvec &coded_bits, bvec &decoded_bits);
//! Decoder function
virtual bvec decode(const bvec &coded_bits);
// Soft-decision decoding is not implemented
virtual void decode(const vec &received_signal, bvec &output);
virtual bvec decode(const vec &received_signal);
//! Gets the rate of the RS-code.
virtual double get_rate() const { return static_cast<double>(k) / n; }
//! Dummy assignment operator - MSVC++ warning C4512
Reed_Solomon & operator=(const Reed_Solomon &) { return *this; }
protected:
/*! Internal encoder/decoder parameters
* @{ */
int m, t, k, n, q;
/*! @} */
//! The generator polynomial of the RS code
GFX g;
//! Whether or not the code is systematic
const bool systematic;
};
} // namespace itpp
#endif // #ifndef REEDSOLOMON_H
|