vf_entropy.c File Reference

#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.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	EntropyContext

Macros
#define	OFFSET(x)   offsetof(EntropyContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Functions
	AVFILTER_DEFINE_CLASS (entropy)
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	entropy_options []
static const AVFilterPad	inputs []
static const AVFilterPad	outputs []
AVFilter	ff_vf_entropy

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(EntropyContext, x)

Definition at line 45 of file vf_entropy.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 46 of file vf_entropy.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

entropy

)

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 56 of file vf_entropy.c.

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 82 of file vf_entropy.c.

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

static

Definition at line 110 of file vf_entropy.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 171 of file vf_entropy.c.

Variable Documentation

const AVOption entropy_options[]

static

Initial value:

= {
    { "mode", "set kind of histogram entropy measurement",  OFFSET(mode), AV_OPT_TYPE_INT,   {.i64=0}, 0, 1, FLAGS, "mode" },
    { "normal", NULL,                                       0,            AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode" },
    { "diff",   NULL,                                       0,            AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode" },
    { NULL }
}

Definition at line 47 of file vf_entropy.c.

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 178 of file vf_entropy.c.

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 188 of file vf_entropy.c.

AVFilter ff_vf_entropy

Initial value:

= {
    .name           = "entropy",
    .description    = NULL_IF_CONFIG_SMALL("Measure video frames entropy."),
    .priv_size      = sizeof(EntropyContext),
    .uninit         = uninit,
    .query_formats  = query_formats,
    .inputs         = inputs,
    .outputs        = outputs,
    .priv_class     = &entropy_class,
    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}

Definition at line 196 of file vf_entropy.c.