Skip to content
Snippets Groups Projects
Commit 597e3232 authored by Michael Niedermayer's avatar Michael Niedermayer
Browse files

simplify

Originally committed as revision 7504 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 7200f5d0
No related branches found
No related tags found
No related merge requests found
...@@ -99,22 +99,16 @@ void av_aes_encrypt(AVAES *a){ ...@@ -99,22 +99,16 @@ void av_aes_encrypt(AVAES *a){
crypt(a, 2, sbox, enc_multbl); crypt(a, 2, sbox, enc_multbl);
} }
static void init_multbl3(uint8_t tbl[4][256][4]){
int i, j, k;
for(k=1; k<4; k++)
for(j=0; j<256; j++)
for(i=0; i<4; i++)
tbl[k][j][i]= tbl[k-1][j][(i-1)&3];
}
static void init_multbl2(uint8_t tbl[1024], int c[4], uint8_t *log8, uint8_t *alog8, uint8_t *sbox){ static void init_multbl2(uint8_t tbl[1024], int c[4], uint8_t *log8, uint8_t *alog8, uint8_t *sbox){
int i; int i, j;
for(i=0; i<1024; i++){ for(i=0; i<1024; i++){
int x= sbox[i/4]; int x= sbox[i/4];
if(x) tbl[i]= alog8[ log8[x] + log8[c[i&3]] ]; if(x) tbl[i]= alog8[ log8[x] + log8[c[i&3]] ];
} }
#ifndef CONFIG_SMALL #ifndef CONFIG_SMALL
init_multbl3(tbl); for(j=256; j<1024; j++)
for(i=0; i<4; i++)
tbl[4*j+i]= tbl[4*j + ((i-1)&3) - 1024];
#endif #endif
} }
......
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment