vf_noise.c File Reference

#include "libavutil/emms.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "libavutil/lfg.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "vf_noise.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	ThreadData
	Used for passing data between threads. More...

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)))

Functions
	AVFILTER_DEFINE_CLASS (noise)
static av_cold int	init_noise (NoiseContext *n, int comp)
static int	query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
static int	config_input (AVFilterLink *inlink)
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)
static void	noise (uint8_t *dst, const uint8_t *src, int dst_linesize, int src_linesize, int width, int start, int end, NoiseContext *n, int comp)
static int	filter_slice (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *inpicref)
static av_cold int	init (AVFilterContext *ctx)
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 []
const AVFilter	ff_vf_noise

Detailed Description

noise generator

Definition in file vf_noise.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(NoiseContext, x)

Definition at line 43 of file vf_noise.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 44 of file vf_noise.c.

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, .unit = #name"_flags"}, \
    {#name"f", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, .unit = #name"_flags"},      \
    {"a", "averaged noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_AVERAGED}, 0, 0, FLAGS, .unit = #name"_flags"},                            \
    {"p", "(semi)regular pattern", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_PATTERN},  0, 0, FLAGS, .unit = #name"_flags"},                     \
    {"t", "temporal noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_TEMPORAL}, 0, 0, FLAGS, .unit = #name"_flags"},                            \
    {"u", "uniform noise",  0, AV_OPT_TYPE_CONST, {.i64=NOISE_UNIFORM},  0, 0, FLAGS, .unit = #name"_flags"},

Definition at line 46 of file vf_noise.c.

RAND_N

#define RAND_N

(

range

)

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

Definition at line 70 of file vf_noise.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

noise

)

init_noise()

static av_cold int init_noise ( NoiseContext *  n, int  comp  )

static

Definition at line 71 of file vf_noise.c.

Referenced by init().

query_formats()

static int query_formats ( const AVFilterContext *  ctx, AVFilterFormatsConfig **  cfg_in, AVFilterFormatsConfig **  cfg_out  )

static

Definition at line 134 of file vf_noise.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 151 of file vf_noise.c.

ff_line_noise_c()

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

Definition at line 168 of file vf_noise.c.

Referenced by init().

ff_line_noise_avg_c()

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

Definition at line 181 of file vf_noise.c.

Referenced by init().

noise()

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

static

Definition at line 193 of file vf_noise.c.

Referenced by ff_line_noise_c(), filter_slice(), and init_noise().

filter_slice()

static int filter_slice ( AVFilterContext *  ctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 227 of file vf_noise.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 245 of file vf_noise.c.

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 287 of file vf_noise.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 318 of file vf_noise.c.

Variable Documentation

noise_options

const AVOption noise_options[]

static

Initial value:

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

Definition at line 57 of file vf_noise.c.

patt

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

static

Definition at line 68 of file vf_noise.c.

Referenced by filter_frame(), get_rdelta(), and init_noise().

noise_inputs

const AVFilterPad noise_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
        .config_props = config_input,
    },
}

Definition at line 327 of file vf_noise.c.

ff_vf_noise

const AVFilter ff_vf_noise

Initial value:

= {
    .name          = "noise",
    .description   = NULL_IF_CONFIG_SMALL("Add noise."),
    .priv_size     = sizeof(NoiseContext),
    .init          = init,
    .uninit        = uninit,
    FILTER_INPUTS(noise_inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
    FILTER_QUERY_FUNC2(query_formats),
    .priv_class    = &noise_class,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
}

Definition at line 336 of file vf_noise.c.