2 * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (c) 2013 Paul B Mahol
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #ifndef AVFILTER_NOISE_H
23 #define AVFILTER_NOISE_H
25 #include "libavutil/lfg.h"
28 #define MAX_NOISE 5120
29 #define MAX_SHIFT 1024
30 #define MAX_RES (MAX_NOISE-MAX_SHIFT)
32 #define NOISE_UNIFORM 1
33 #define NOISE_TEMPORAL 2
34 #define NOISE_AVERAGED 8
35 #define NOISE_PATTERN 16
37 typedef struct FilterParams {
43 int8_t *prev_shift[MAX_RES][3];
44 int rand_shift[MAX_RES];
48 typedef struct NoiseContext {
54 FilterParams param[4];
55 void (*line_noise)(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift);
56 void (*line_noise_avg)(uint8_t *dst, const uint8_t *src, int len, const int8_t * const *shift);
59 void ff_line_noise_c(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift);
60 void ff_line_noise_avg_c(uint8_t *dst, const uint8_t *src, int len, const int8_t * const *shift);
62 void ff_noise_init_x86(NoiseContext *n);
64 #endif /* AVFILTER_NOISE_H */