vf_blurdetect.c File Reference

No-reference blurdetect filter. More...

#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/qsort.h"
#include "filters.h"
#include "edge_common.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	BLRContext

Macros
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Functions
static int	comp (const float *a, const float *b)
	AVFILTER_DEFINE_CLASS (blurdetect)
static av_cold int	blurdetect_init (AVFilterContext *ctx)
static int	blurdetect_config_input (AVFilterLink *inlink)
static float	edge_width (BLRContext *blr, int i, int j, int8_t dir, int w, int h, int edge, const uint8_t *src, int src_linesize)
static float	calculate_blur (BLRContext *s, int w, int h, int hsub, int vsub, int8_t *dir, int dir_linesize, uint8_t *dst, int dst_linesize, uint8_t *src, int src_linesize)
static void	set_meta (AVDictionary **metadata, const char *key, float d)
static int	blurdetect_filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	blurdetect_uninit (AVFilterContext *ctx)

Variables
static const AVOption	blurdetect_options []
static enum AVPixelFormat	pix_fmts []
static const AVFilterPad	blurdetect_inputs []
const FFFilter	ff_vf_blurdetect

Detailed Description

No-reference blurdetect filter.

Implementing: Marziliano, Pina, et al. "A no-reference perceptual blur metric." Proceedings. International conference on image processing. Vol. 3. IEEE, 2002. https://infoscience.epfl.ch/record/111802/files/14%20A%20no-reference%20perceptual%20blur%20metric.pdf

Author

Thilo Borgmann <thilo.borgmann at mail.de>

Definition in file vf_blurdetect.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(BLRContext, x)

Definition at line 71 of file vf_blurdetect.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 72 of file vf_blurdetect.c.

Function Documentation

comp()

static int comp ( const float * a, const float * b )

static

Definition at line 42 of file vf_blurdetect.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

blurdetect

)

blurdetect_init()

static av_cold int blurdetect_init ( AVFilterContext * ctx )

static

Definition at line 86 of file vf_blurdetect.c.

blurdetect_config_input()

static int blurdetect_config_input ( AVFilterLink * inlink )

static

Definition at line 96 of file vf_blurdetect.c.

edge_width()

static float edge_width ( BLRContext * blr, int i, int j, int8_t dir, int w, int h, int edge, const uint8_t * src, int src_linesize )

static

Definition at line 127 of file vf_blurdetect.c.

Referenced by calculate_blur().

calculate_blur()

static float calculate_blur ( BLRContext * s, int w, int h, int hsub, int vsub, int8_t * dir, int dir_linesize, uint8_t * dst, int dst_linesize, uint8_t * src, int src_linesize )

static

Definition at line 193 of file vf_blurdetect.c.

Referenced by blurdetect_filter_frame().

set_meta()

static void set_meta ( AVDictionary ** metadata, const char * key, float d )

static

Definition at line 248 of file vf_blurdetect.c.

Referenced by blurdetect_filter_frame().

blurdetect_filter_frame()

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

static

Definition at line 255 of file vf_blurdetect.c.

blurdetect_uninit()

static av_cold void blurdetect_uninit ( AVFilterContext * ctx )

static

Definition at line 323 of file vf_blurdetect.c.

Variable Documentation

blurdetect_options

const AVOption blurdetect_options[]

static

Initial value:

= {
    { "high",          "set high threshold", OFFSET(high), AV_OPT_TYPE_FLOAT, {.dbl=30/255.}, 0, 1, FLAGS },
    { "low",           "set low threshold",  OFFSET(low),  AV_OPT_TYPE_FLOAT, {.dbl=15/255.}, 0, 1, FLAGS },
    { "radius",        "search radius for maxima detection", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=50}, 1, 100, FLAGS },
    { "block_pct",     "block pooling threshold when calculating blurriness", OFFSET(block_pct), AV_OPT_TYPE_INT, {.i64=80}, 1, 100, FLAGS },
    { "block_width",   "block size for block-based abbreviation of blurriness", OFFSET(block_width), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS },
    { "block_height",  "block size for block-based abbreviation of blurriness", OFFSET(block_height), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS },
    { "planes",        "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1}, 0, 15, FLAGS },
    { NULL }
}

Definition at line 73 of file vf_blurdetect.c.

pix_fmts

enum AVPixelFormat pix_fmts[]

static

Initial value:

= {
    AV_PIX_FMT_GRAY8,
    AV_PIX_FMT_GBRP,     AV_PIX_FMT_GBRAP,
    AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV420P,
    AV_PIX_FMT_YUV444P,  AV_PIX_FMT_YUV440P,
    AV_PIX_FMT_YUV411P,  AV_PIX_FMT_YUV410P,
    AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P,
    AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
    AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
    AV_PIX_FMT_NONE
}

Definition at line 339 of file vf_blurdetect.c.

blurdetect_inputs

const AVFilterPad blurdetect_inputs[]

static

Initial value:

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

Definition at line 351 of file vf_blurdetect.c.

ff_vf_blurdetect

const FFFilter ff_vf_blurdetect

Initial value:

= {
    .p.name        = "blurdetect",
    .p.description = NULL_IF_CONFIG_SMALL("Blurdetect filter."),
    .p.priv_class  = &blurdetect_class,
    .p.flags       = AVFILTER_FLAG_METADATA_ONLY,
    .priv_size     = sizeof(BLRContext),
    .init          = blurdetect_init,
    .uninit        = blurdetect_uninit,
    FILTER_PIXFMTS_ARRAY(pix_fmts),
    FILTER_INPUTS(blurdetect_inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
}

Definition at line 360 of file vf_blurdetect.c.