FFmpeg
vf_noise.h
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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 FilterParams {
38  int strength;
39  unsigned flags;
41  int seed;
42  int8_t *noise;
43  int8_t *prev_shift[MAX_RES][3];
46 } FilterParams;
47 
48 typedef struct NoiseContext {
49  const AVClass *class;
50  int nb_planes;
51  int bytewidth[4];
52  int height[4];
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 
63 
64 #endif /* AVFILTER_NOISE_H */
uint8_t shift
Right shift to apply to output of filter.
Definition: mlp.h:76
Context structure for the Lagged Fibonacci PRNG.
Definition: lfg.h:33
int nb_planes
Definition: vf_noise.h:50
Main libavfilter public API header.
AVLFG lfg
Definition: vf_noise.h:40
FilterParams all
Definition: vf_noise.h:53
#define src
Definition: vp8dsp.c:254
int rand_shift_init
Definition: vf_noise.h:45
uint8_t
int strength
Definition: vf_noise.h:38
#define height
unsigned flags
Definition: vf_noise.h:39
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
int n
Definition: avisynth_c.h:760
int8_t * prev_shift[MAX_RES][3]
Definition: vf_noise.h:43
int8_t * noise
Definition: vf_noise.h:42
void ff_noise_init_x86(NoiseContext *n)
Definition: vf_noise.c:129
filter data
Definition: mlp.h:74
void ff_line_noise_avg_c(uint8_t *dst, const uint8_t *src, int len, const int8_t *const *shift)
Definition: vf_noise.c:178
Describe the class of an AVClass context structure.
Definition: log.h:67
#define MAX_RES
Definition: vf_noise.h:30
int rand_shift[MAX_RES]
Definition: vf_noise.h:44
void ff_line_noise_c(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift)
Definition: vf_noise.c:165
int len