1 /* This function wraps around the fixed 8-bit decoder, performing the
2 * basis transformations necessary to meet the CCSDS standard
3 *
4 * Copyright 2002, Phil Karn, KA9Q
5 * May be used under the terms of the GNU General Public License (GPL)
6 */
7 #define FIXED 1
8 #include "ccsds.h"
9 #include "fixed.h"
10
decode_rs_ccsds(unsigned char * data,int * eras_pos,int no_eras)11 int decode_rs_ccsds(unsigned char* data, int* eras_pos, int no_eras)
12 {
13 int i, r;
14 unsigned char cdata[NN];
15
16 /* Convert data from dual basis to conventional */
17 for (i = 0; i < NN; i++)
18 cdata[i] = Tal1tab[data[i]];
19
20 r = decode_rs_8(cdata, eras_pos, no_eras);
21
22 if (r > 0) {
23 /* Convert from conventional to dual basis */
24 for (i = 0; i < NN; i++)
25 data[i] = Taltab[cdata[i]];
26 }
27 return r;
28 }
29