mirror of
https://github.com/libretro/beetle-pce-fast-libretro.git
synced 2024-11-23 16:00:08 +00:00
41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
/* dvdisaster: Additional error correction for optical media.
|
|
* Copyright (C) 2004-2007 Carsten Gnoerlich.
|
|
* Project home page: http://www.dvdisaster.com
|
|
* Email: carsten@dvdisaster.com -or- cgnoerlich@fsfe.org
|
|
*
|
|
* The Reed-Solomon error correction draws a lot of inspiration - and even code -
|
|
* from Phil Karn's excellent Reed-Solomon library: http://www.ka9q.net/code/fec/
|
|
*
|
|
* 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 of the License, 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; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA,
|
|
* or direct your browser at http://www.gnu.org.
|
|
*/
|
|
|
|
#include "dvdisaster.h"
|
|
|
|
/*
|
|
* The following routine is performance critical.
|
|
*/
|
|
|
|
static inline int mod_fieldmax(int x)
|
|
{
|
|
while (x >= GF_FIELDMAX)
|
|
{
|
|
x -= GF_FIELDMAX;
|
|
x = (x >> GF_SYMBOLSIZE) + (x & GF_FIELDMAX);
|
|
}
|
|
|
|
return x;
|
|
}
|