OpenJPEG 1.5.2
rs.h
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1/*
2 * Copyright (c) 2001-2003, David Janssens
3 * Copyright (c) 2002-2003, Yannick Verschueren
4 * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
5 * Copyright (c) 2005, Herve Drolon, FreeImage Team
6 * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
7 * Copyright (c) 2005-2006, Dept. of Electronic and Information Engineering, Universita' degli Studi di Perugia, Italy
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifdef USE_JPWL
33
39
40#ifndef __RS_HEADER__
41#define __RS_HEADER__
42
57#define MM 8 /* RS code over GF(2**MM) - change to suit */
58
59/* KK defined in rs.c */
60
61#define NN ((1 << MM) - 1)
62
63#if (MM <= 8)
64typedef unsigned char dtype;
65#else
66typedef unsigned int dtype;
67#endif
68
70void init_rs(int);
71
75void generate_gf(void); /* Generate Galois Field */
76void gen_poly(void); /* Generate generator polynomial */
77
83int encode_rs(dtype data[], dtype bb[]);
84
93int eras_dec_rs(dtype data[], int eras_pos[], int no_eras);
94
101#ifndef min
102#define min(a,b) (((a) < (b)) ? (a) : (b))
103#endif /* min */
104
105#endif /* __RS_HEADER__ */
106
107
108#endif /* USE_JPWL */
int eras_dec_rs(dtype data[], int eras_pos[], int no_eras)
Reed-Solomon erasures-and-errors decoding The received block goes into data[], and a list of zero-ori...
int encode_rs(dtype data[], dtype bb[])
Reed-Solomon encoding data[] is the input block, parity symbols are placed in bb[] bb[] may lie past ...
unsigned char dtype
Definition rs.h:64
void init_rs(int)
Initialization function.
Definition rs.c:198
void gen_poly(void)
Definition rs.c:289
void generate_gf(void)
These two functions must be called in this order (e.g., by init_rs()) before any encoding/decoding.
Definition rs.c:242