vf_elbg.c File Reference

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

Go to the source code of this file.

Data Structures
struct	ELBGFilterContext

Macros
#define	OFFSET(x)   offsetof(ELBGFilterContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	NB_COMPONENTS   4
#define	R   0
#define	G   1
#define	B   2
#define	A   3

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 []
const AVFilter	ff_vf_elbg

Detailed Description

video quantizer filter based on ELBG

Definition in file vf_elbg.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(ELBGFilterContext, x)

Definition at line 55 of file vf_elbg.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 56 of file vf_elbg.c.

NB_COMPONENTS

#define NB_COMPONENTS   4

Definition at line 112 of file vf_elbg.c.

R

#define R   0

Definition at line 142 of file vf_elbg.c.

G

#define G   1

Definition at line 143 of file vf_elbg.c.

B

#define B   2

Definition at line 144 of file vf_elbg.c.

A

#define A   3

Definition at line 145 of file vf_elbg.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

elbg

)

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 72 of file vf_elbg.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 88 of file vf_elbg.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 114 of file vf_elbg.c.

filter_frame()

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

static

Definition at line 147 of file vf_elbg.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 237 of file vf_elbg.c.

Variable Documentation

elbg_options

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_INT64, {.i64 = -1}, -1, UINT32_MAX, FLAGS },
    { "s",    "set the random seed", OFFSET(lfg_seed), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, UINT32_MAX, FLAGS },
    { "pal8", "set the pal8 output", OFFSET(pal8), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
    { "use_alpha", "use alpha channel for mapping", OFFSET(use_alpha), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
    { NULL }
}

Definition at line 58 of file vf_elbg.c.

elbg_inputs

const AVFilterPad elbg_inputs[]

static

Initial value:

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

Definition at line 248 of file vf_elbg.c.

ff_vf_elbg

const AVFilter ff_vf_elbg

Initial value:

= {
    .name          = "elbg",
    .description   = NULL_IF_CONFIG_SMALL("Apply posterize effect, using the ELBG algorithm."),
    .priv_size     = sizeof(ELBGFilterContext),
    .priv_class    = &elbg_class,
    .init          = init,
    .uninit        = uninit,
    FILTER_INPUTS(elbg_inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
    FILTER_QUERY_FUNC(query_formats),
}

Definition at line 258 of file vf_elbg.c.