vf_elbg.c File Reference

video quantizer filter based on ELBG More...

#include "libavcodec/elbg.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/random_seed.h"
#include "avfilter.h"
#include "drawutils.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	ELBGContext

Macros
#define	OFFSET(x)   offsetof(ELBGContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	NB_COMPONENTS   3
#define	R   0
#define	G   1
#define	B   2

Functions
	AVFILTER_DEFINE_CLASS (elbg)
static av_cold int	init (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *frame)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	elbg_options []
static const AVFilterPad	elbg_inputs []
static const AVFilterPad	elbg_outputs []
AVFilter	ff_vf_elbg

Detailed Description

video quantizer filter based on ELBG

Definition in file vf_elbg.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(ELBGContext, x)

Definition at line 50 of file vf_elbg.c.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 51 of file vf_elbg.c.

#define NB_COMPONENTS   3

Definition at line 89 of file vf_elbg.c.

Referenced by config_input(), and filter_frame().

#define R   0

Definition at line 119 of file vf_elbg.c.

#define G   1

Definition at line 120 of file vf_elbg.c.

#define B   2

Definition at line 121 of file vf_elbg.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

elbg

)

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 65 of file vf_elbg.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 76 of file vf_elbg.c.

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 91 of file vf_elbg.c.

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

static

Definition at line 123 of file vf_elbg.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 174 of file vf_elbg.c.

Variable Documentation

const AVOption elbg_options[]

static

Initial value:

= {
    { "codebook_length", "set codebook length", OFFSET(codebook_length), AV_OPT_TYPE_INT, { .i64 = 256 }, 1, INT_MAX, FLAGS },
    { "l",               "set codebook length", OFFSET(codebook_length), AV_OPT_TYPE_INT, { .i64 = 256 }, 1, INT_MAX, FLAGS },
    { "nb_steps", "set max number of steps used to compute the mapping", OFFSET(max_steps_nb), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, FLAGS },
    { "n",        "set max number of steps used to compute the mapping", OFFSET(max_steps_nb), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, FLAGS },
    { "seed", "set the random seed", OFFSET(lfg_seed), AV_OPT_TYPE_INT, {.i64 = -1}, -1, UINT32_MAX, FLAGS },
    { "s",    "set the random seed", OFFSET(lfg_seed), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, UINT32_MAX, FLAGS },
    { NULL }
}

Definition at line 53 of file vf_elbg.c.

const AVFilterPad elbg_inputs[]

static

Initial value:

= {
    {
        .name           = "default",
        .type           = AVMEDIA_TYPE_VIDEO,
        .config_props   = config_input,
        .filter_frame   = filter_frame,
        .needs_writable = 1,
    },
    { NULL }
}

Definition at line 183 of file vf_elbg.c.

const AVFilterPad elbg_outputs[]

static

Initial value:

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

Definition at line 194 of file vf_elbg.c.

AVFilter ff_vf_elbg

Initial value:

= {
    .name          = "elbg",
    .description   = NULL_IF_CONFIG_SMALL("Apply posterize effect, using the ELBG algorithm."),
    .priv_size     = sizeof(ELBGContext),
    .priv_class    = &elbg_class,
    .query_formats = query_formats,
    .init          = init,
    .uninit        = uninit,
    .inputs        = elbg_inputs,
    .outputs       = elbg_outputs,
}

Definition at line 202 of file vf_elbg.c.