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 "video.h"

Data Structures
struct	FilterParams
	filter data More...

struct	NoiseContext

Macros
#define	MAX_NOISE 4096

#define	MAX_SHIFT 1024

#define	MAX_RES (MAX_NOISE-MAX_SHIFT)

#define	NOISE_UNIFORM 1

#define	NOISE_TEMPORAL 2

#define	NOISE_QUALITY 4

#define	NOISE_AVERAGED 8

#define	NOISE_PATTERN 16

#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)))

Functions
	AVFILTER_DEFINE_CLASS (noise)

static int	init_noise (NoiseContext *n, int comp)

static av_cold int	init (AVFilterContext ctx, const char args)

static int	query_formats (AVFilterContext *ctx)

static int	config_input (AVFilterLink *inlink)

static void	line_noise (uint8_t dst, const uint8_t src, int8_t *noise, int len, int shift)

static void	line_noise_avg (uint8_t dst, const uint8_t src, int len, int8_t **shift)

static void	noise (uint8_t dst, const uint8_t src, int dst_linesize, int src_linesize, int width, int height, NoiseContext *n, int comp)

static int	filter_frame (AVFilterLink inlink, AVFilterBufferRef inpicref)

static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	noise_options []

static const int8_t	patt [4] = { -1, 0, 1, 0 }

static const AVFilterPad	noise_inputs []

static const AVFilterPad	noise_outputs []

AVFilter	avfilter_vf_noise

Detailed Description

noise generator

Definition in file vf_noise.c.

Macro Definition Documentation

#define MAX_NOISE 4096

Definition at line 37 of file vf_noise.c.

Referenced by init_noise().

#define MAX_SHIFT 1024

Definition at line 38 of file vf_noise.c.

Referenced by init_noise(), and noise().

#define MAX_RES (MAX_NOISE-MAX_SHIFT)

Definition at line 39 of file vf_noise.c.

Referenced by init_noise().

#define NOISE_UNIFORM 1

Definition at line 41 of file vf_noise.c.

Referenced by init_noise().

#define NOISE_TEMPORAL 2

Definition at line 42 of file vf_noise.c.

Referenced by noise().

#define NOISE_QUALITY 4

Definition at line 43 of file vf_noise.c.

Referenced by noise().

#define NOISE_AVERAGED 8

Definition at line 44 of file vf_noise.c.

Referenced by init_noise(), and noise().

#define NOISE_PATTERN 16

Definition at line 45 of file vf_noise.c.

Referenced by init_noise().

#define OFFSET ( x ) offsetof(NoiseContext, x)

Definition at line 68 of file vf_noise.c.

#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 69 of file vf_noise.c.

#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"},                     \
    {"q", "high quality",   0, AV_OPT_TYPE_CONST, {.i64=NOISE_QUALITY},  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"},

Definition at line 71 of file vf_noise.c.

#define RAND_N ( range ) ((int) ((double) range * av_lfg_get(lfg) / (UINT_MAX + 1.0)))

Definition at line 96 of file vf_noise.c.

Referenced by init_noise().

Function Documentation

AVFILTER_DEFINE_CLASS ( noise )

static int init_noise	(	NoiseContext *	n,
		int	comp
	)

static

Definition at line 97 of file vf_noise.c.

Referenced by init().

static av_cold int init	(	AVFilterContext *	ctx,
		const char *	args
	)

static

Definition at line 167 of file vf_noise.c.

static int query_formats ( AVFilterContext * ctx )

static

Definition at line 197 of file vf_noise.c.

static int config_input ( AVFilterLink * inlink )

static

Definition at line 212 of file vf_noise.c.

static void line_noise	(	uint8_t *	dst,
		const uint8_t *	src,
		int8_t *	noise,
		int	len,
		int	shift
	)

static

Definition at line 231 of file vf_noise.c.

Referenced by noise().

static void line_noise_avg	(	uint8_t *	dst,
		const uint8_t *	src,
		int	len,
		int8_t **	shift
	)

static

Definition at line 244 of file vf_noise.c.

Referenced by noise().

static void noise	(	uint8_t *	dst,
		const uint8_t *	src,
		int	dst_linesize,
		int	src_linesize,
		int	width,
		int	height,
		NoiseContext *	n,
		int	comp
	)

static

Definition at line 256 of file vf_noise.c.

Referenced by filter_frame(), and init_noise().

static int filter_frame	(	AVFilterLink *	inlink,
		AVFilterBufferRef *	inpicref
	)

static

Definition at line 301 of file vf_noise.c.

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 329 of file vf_noise.c.

Variable Documentation

const AVOption noise_options[]

static

Initial value:

= {
    NOISE_PARAMS(c3,  3, param[3])
    {NULL}
}

Definition at line 83 of file vf_noise.c.

const int8_t patt[4] = { -1, 0, 1, 0 }

static

Definition at line 94 of file vf_noise.c.

Referenced by init_noise().

const AVFilterPad noise_inputs[]

static

Initial value:

= {
    {
        .name             = "default",
        .type             = AVMEDIA_TYPE_VIDEO,
        .get_video_buffer = ff_null_get_video_buffer,
        .filter_frame     = filter_frame,
        .config_props     = config_input,
        .min_perms        = AV_PERM_READ,
    },
    { NULL }
}

Definition at line 339 of file vf_noise.c.

const AVFilterPad noise_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
    },
    { NULL }
}

Definition at line 351 of file vf_noise.c.

AVFilter avfilter_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,
}

Definition at line 359 of file vf_noise.c.

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

Function Documentation

Variable Documentation