00001 /* 00002 * Copyright (c) 2001-2003, David Janssens 00003 * Copyright (c) 2002-2003, Yannick Verschueren 00004 * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe 00005 * Copyright (c) 2005, Hervé Drolon, FreeImage Team 00006 * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium 00007 * Copyright (c) 2005-2006, Dept. of Electronic and Information Engineering, Universita' degli Studi di Perugia, Italy 00008 * All rights reserved. 00009 * 00010 * Redistribution and use in source and binary forms, with or without 00011 * modification, are permitted provided that the following conditions 00012 * are met: 00013 * 1. Redistributions of source code must retain the above copyright 00014 * notice, this list of conditions and the following disclaimer. 00015 * 2. Redistributions in binary form must reproduce the above copyright 00016 * notice, this list of conditions and the following disclaimer in the 00017 * documentation and/or other materials provided with the distribution. 00018 * 00019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' 00020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00021 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00022 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 00023 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00024 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00025 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00026 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00027 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00028 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00029 * POSSIBILITY OF SUCH DAMAGE. 00030 */ 00031 00032 #ifdef USE_JPWL 00033 00040 #ifndef __RS_HEADER__ 00041 #define __RS_HEADER__ 00042 00057 #define MM 8 /* RS code over GF(2**MM) - change to suit */ 00058 static int KK; 00059 00060 /* Original code */ 00061 /*#define KK 239*/ /* KK = number of information symbols */ 00062 00063 #define NN ((1 << MM) - 1) 00064 00065 #if (MM <= 8) 00066 typedef unsigned char dtype; 00067 #else 00068 typedef unsigned int dtype; 00069 #endif 00070 00072 void init_rs(int); 00073 00077 void generate_gf(void); /* Generate Galois Field */ 00078 void gen_poly(void); /* Generate generator polynomial */ 00079 00085 int encode_rs(dtype data[], dtype bb[]); 00086 00095 int eras_dec_rs(dtype data[], int eras_pos[], int no_eras); 00096 00103 #ifndef min 00104 #define min(a,b) (((a) < (b)) ? (a) : (b)) 00105 #endif /* min */ 00106 00107 #endif /* __RS_HEADER__ */ 00108 00109 00110 #endif /* USE_JPWL */
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