1 /*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg 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 GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <stdlib.h>
22 #include <string.h>
23
26
27
29 uint8_t **poutbuf,
int *poutbuf_size,
30 const uint8_t *
buf,
int buf_size,
int keyframe){
32 int amount= args ? atoi(args) : (*state % 10001+1);
33 int i;
34
35 if(amount <= 0)
37
39 if (!*poutbuf)
41
43 for(i=0; i<buf_size; i++){
44 (*state) += (*poutbuf)[i] + 1;
45 if(*state % amount == 0)
46 (*poutbuf)[i] = *
state;
47 }
48 return 1;
49 }
50
52 "noise",
53 sizeof(int),
55 };