vf_noise.c File Reference

noise generator More...

#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "libavutil/lfg.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "vf_noise.h"
#include "video.h"

Classes
struct	ThreadData

Macros
#define	OFFSET(x)   offsetof(NoiseContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	NOISE_PARAMS(name, x, param)
#define	RAND_N(range)   ((int) ((double) range * av_lfg_get(lfg) / (UINT_MAX + 1.0)))

Typedefs
typedef struct ThreadData	ThreadData

Functions
	AVFILTER_DEFINE_CLASS (noise)
void	ff_line_noise_c (uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift)
void	ff_line_noise_avg_c (uint8_t *dst, const uint8_t *src, int len, const int8_t *const *shift)

Variables
AVFilter	ff_vf_noise

Detailed Description

noise generator

Macro Definition Documentation

NOISE_PARAMS

#define NOISE_PARAMS	(		name,
			x,
			param
	)

Value:

{#name"_seed", "set component #"#x" noise seed", OFFSET(param.seed), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS},        \
    {#name"_strength", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS},        \
    {#name"s",         "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS},        \
    {#name"_flags", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, #name"_flags"}, \
    {#name"f", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, #name"_flags"},      \
    {"a", "averaged noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_AVERAGED}, 0, 0, FLAGS, #name"_flags"},                            \
    {"p", "(semi)regular pattern", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_PATTERN},  0, 0, FLAGS, #name"_flags"},                     \
    {"t", "temporal noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_TEMPORAL}, 0, 0, FLAGS, #name"_flags"},                            \
    {"u", "uniform noise",  0, AV_OPT_TYPE_CONST, {.i64=NOISE_UNIFORM},  0, 0, FLAGS, #name"_flags"},

Variable Documentation

ff_vf_noise

AVFilter ff_vf_noise

Initial value:

= {
    .name          = "noise",
    .description   = NULL_IF_CONFIG_SMALL("Add noise."),
    .priv_size     = sizeof(NoiseContext),
    .init          = init,
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = noise_inputs,
    .outputs       = noise_outputs,
    .priv_class    = &noise_class,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
}