ffdecsa/fftable.h

   1 /* FFdecsa -- fast decsa algorithm
   2  *
   3  * Copyright (C) 2007 Dark Avenger
   4  *               2003-2004  fatih89r
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #ifndef FFTABLE_H
  22 #define FFTABLE_H
  23
  24 inline static void FFTABLEIN(unsigned char *tab, int g, unsigned char *data)
  25 {
  26 #if 0
  27   *(((int *)tab)+2*g)=*((int *)data);
  28   *(((int *)tab)+2*g+1)=*(((int *)data)+1);
  29 #else
  30   *(((long long *)tab)+g)=*((long long *)data);
  31 #endif
  32 }
  33
  34 inline static void FFTABLEOUT(unsigned char *data, unsigned char *tab, int g)
  35 {
  36 #if 1
  37   *((int *)data)=*(((int *)tab)+2*g);
  38   *(((int *)data)+1)=*(((int *)tab)+2*g+1);
  39 #else
  40   *((long long *)data)=*(((long long *)tab)+g);
  41 #endif
  42 }
  43
  44 inline static void FFTABLEOUTXORNBY(int n, unsigned char *data, unsigned char *tab, int g)
  45 {
  46   int j;
  47   for(j=0;j<n;j++) *(data+j)^=*(tab+8*g+j);
  48 }
  49
  50 #undef XOREQ_BEST_BY
  51 inline static void XOREQ_BEST_BY(unsigned char *d, unsigned char *s)
  52 {
  53         XOR_BEST_BY(d, d, s);
  54 }
  55
  56 #endif //FFTABLE_H