blob: 2207ed961f5f7974c6dc52e9222ee5c810ba2d36
1 | /* |
2 | * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at> |
3 | * Copyright (c) 2013 Paul B Mahol |
4 | * |
5 | * This file is part of FFmpeg. |
6 | * |
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. |
11 | * |
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. |
16 | * |
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 |
20 | */ |
21 | |
22 | #ifndef AVFILTER_NOISE_H |
23 | #define AVFILTER_NOISE_H |
24 | |
25 | #include "libavutil/lfg.h" |
26 | #include "avfilter.h" |
27 | |
28 | #define MAX_NOISE 5120 |
29 | #define MAX_SHIFT 1024 |
30 | #define MAX_RES (MAX_NOISE-MAX_SHIFT) |
31 | |
32 | #define NOISE_UNIFORM 1 |
33 | #define NOISE_TEMPORAL 2 |
34 | #define NOISE_AVERAGED 8 |
35 | #define NOISE_PATTERN 16 |
36 | |
37 | typedef struct { |
38 | int strength; |
39 | unsigned flags; |
40 | AVLFG lfg; |
41 | int seed; |
42 | int8_t *noise; |
43 | int8_t *prev_shift[MAX_RES][3]; |
44 | int rand_shift[MAX_RES]; |
45 | int rand_shift_init; |
46 | } FilterParams; |
47 | |
48 | typedef struct { |
49 | const AVClass *class; |
50 | int nb_planes; |
51 | int bytewidth[4]; |
52 | int height[4]; |
53 | FilterParams all; |
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); |
57 | } NoiseContext; |
58 | |
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); |
61 | |
62 | void ff_noise_init_x86(NoiseContext *n); |
63 | |
64 | #endif /* AVFILTER_NOISE_H */ |
65 |