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New upstream version 0.79.5

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TANIGUCHI Takaki
2017-02-02 22:24:37 +09:00
parent 2f23ea4b4a
commit 9ad5d25d65
1931 changed files with 104660 additions and 254637 deletions
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36
galois.c
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@@ -1,25 +1,26 @@
/* dvdisaster: Additional error correction for optical media.
* Copyright (C) 2004-2012 Carsten Gnoerlich.
* Project home page: http://www.dvdisaster.com
* Email: carsten@dvdisaster.com -or- cgnoerlich@fsfe.org
* Copyright (C) 2004-2015 Carsten Gnoerlich.
*
* 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
* Email: carsten@dvdisaster.org -or- cgnoerlich@fsfe.org
* Project homepage: http://www.dvdisaster.org
*
* This file is part of dvdisaster.
*
* dvdisaster 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
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* dvdisaster 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.
* along with dvdisaster. If not, see <http://www.gnu.org/licenses/>.
*/
#include "dvdisaster.h"
@@ -84,7 +85,7 @@ void FreeGaloisTables(GaloisTables *gt)
}
/***
*** Create the the Reed-Solomon generator polynomial
*** Create the Reed-Solomon generator polynomial
*** and some auxiliary data structures.
*/
@@ -95,6 +96,7 @@ ReedSolomonTables *CreateReedSolomonTables(GaloisTables *gt,
{ ReedSolomonTables *rt = g_malloc0(sizeof(ReedSolomonTables));
int lut_size, feedback;
gint32 i,j,root;
guint8 *lut;
rt->gfTables = gt;
rt->fcr = first_consecutive_root;
@@ -151,7 +153,9 @@ ReedSolomonTables *CreateReedSolomonTables(GaloisTables *gt,
rt->shiftInit = 0;
/*
* Initialize lookup tables for the 8bit encoder
* Initialize lookup tables for both encoder types.
* The 32bit portable encoder will shift them to word boundaries,
* while the SSE2 encoder does direct unaligned reads.
*/
lut_size = (rt->nroots+15)&~15;
@@ -170,6 +174,15 @@ ReedSolomonTables *CreateReedSolomonTables(GaloisTables *gt,
}
}
/*
* Prepare lookup table for syndrome calculation.
*/
lut = rt->synLut = g_malloc(rt->nroots * GF_FIELDSIZE * sizeof(int));
for(i=0; i<rt->nroots; i++)
for(j=0; j<GF_FIELDSIZE; j++)
*lut++ = gt->alphaTo[mod_fieldmax(gt->indexOf[j] + (rt->fcr+i)*rt->primElem)];
return rt;
}
@@ -181,6 +194,7 @@ void FreeReedSolomonTables(ReedSolomonTables *rt)
for(i=0; i<GF_FIELDSIZE; i++)
{ g_free(rt->bLut[i]);
}
g_free(rt->synLut);
g_free(rt);
}