vf_entropy.c File Reference

#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "drawutils.h"
#include "filters.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	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 enum AVPixelFormat	pixfmts []
static const AVFilterPad	inputs []
const AVFilter	ff_vf_entropy

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(EntropyContext, x)

Definition at line 44 of file vf_entropy.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 45 of file vf_entropy.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

entropy

)

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 73 of file vf_entropy.c.

filter_frame()

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

static

Definition at line 101 of file vf_entropy.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 162 of file vf_entropy.c.

Variable Documentation

entropy_options

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, .unit = "mode" },
    { "normal", NULL,                                       0,            AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "mode" },
    { "diff",   NULL,                                       0,            AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "mode" },
    { NULL }
}

Definition at line 46 of file vf_entropy.c.

pixfmts

enum AVPixelFormat pixfmts[]

static

Initial value:

= {
    AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
    AV_PIX_FMT_YUV440P,
    AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
    AV_PIX_FMT_YUVJ440P,
    AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV420P9,
    AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10,
    AV_PIX_FMT_YUV440P10,
    AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
    AV_PIX_FMT_YUV440P12,
    AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
    AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV420P16,
    AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
    AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
    AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
    AV_PIX_FMT_NONE
}

Definition at line 55 of file vf_entropy.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 169 of file vf_entropy.c.

ff_vf_entropy

const AVFilter ff_vf_entropy

Initial value:

= {
    .name           = "entropy",
    .description    = NULL_IF_CONFIG_SMALL("Measure video frames entropy."),
    .priv_size      = sizeof(EntropyContext),
    .uninit         = uninit,
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
    FILTER_PIXFMTS_ARRAY(pixfmts),
    .priv_class     = &entropy_class,
    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_METADATA_ONLY,
}

Definition at line 178 of file vf_entropy.c.