vf_blockdetect.c File Reference

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

Go to the source code of this file.

Data Structures
struct	BLKContext

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

Functions
	AVFILTER_DEFINE_CLASS (blockdetect)
static int	blockdetect_config_input (AVFilterLink *inlink)
static float	calculate_blockiness (BLKContext *s, int w, int h, float *grad, int grad_linesize, uint8_t *src, int src_linesize)
static void	set_meta (AVDictionary **metadata, const char *key, float d)
static int	blockdetect_filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	blockdetect_uninit (AVFilterContext *ctx)

Variables
static const AVOption	blockdetect_options []
static enum AVPixelFormat	pix_fmts []
static const AVFilterPad	blockdetect_inputs []
const AVFilter	ff_vf_blockdetect

Detailed Description

No-reference blockdetect filter

Implementing: Remco Muijs and Ihor Kirenko: "A no-reference blocking artifact measure for adaptive video processing." 2005 13th European signal processing conference. IEEE, 2005. http://www.eurasip.org/Proceedings/Eusipco/Eusipco2005/defevent/papers/cr1042.pdf

Author

Thilo Borgmann <thilo.borgmann at mail.de>

Definition in file vf_blockdetect.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(BLKContext, x)

Definition at line 55 of file vf_blockdetect.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 56 of file vf_blockdetect.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

blockdetect

)

blockdetect_config_input()

static int blockdetect_config_input ( AVFilterLink *  inlink )

static

Definition at line 66 of file vf_blockdetect.c.

calculate_blockiness()

static float calculate_blockiness ( BLKContext *  s, int  w, int  h, float *  grad, int  grad_linesize, uint8_t *  src, int  src_linesize  )

static

Definition at line 86 of file vf_blockdetect.c.

Referenced by blockdetect_filter_frame().

set_meta()

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

static

Definition at line 193 of file vf_blockdetect.c.

Referenced by blockdetect_filter_frame().

blockdetect_filter_frame()

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

static

Definition at line 200 of file vf_blockdetect.c.

blockdetect_uninit()

static av_cold void blockdetect_uninit ( AVFilterContext *  ctx )

static

Definition at line 246 of file vf_blockdetect.c.

Variable Documentation

blockdetect_options

const AVOption blockdetect_options[]

static

Initial value:

= {
    { "period_min", "Minimum period to search for", OFFSET(period_min), AV_OPT_TYPE_INT, {.i64=3}, 2, 32, FLAGS},
    { "period_max", "Maximum period to search for", OFFSET(period_max), AV_OPT_TYPE_INT, {.i64=24}, 2, 64, FLAGS},
    { "planes",        "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1}, 0, 15, FLAGS },
    { NULL }
}

Definition at line 57 of file vf_blockdetect.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 258 of file vf_blockdetect.c.

blockdetect_inputs

const AVFilterPad blockdetect_inputs[]

static

Initial value:

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

Definition at line 270 of file vf_blockdetect.c.

ff_vf_blockdetect

const AVFilter ff_vf_blockdetect

Initial value:

= {
    .name          = "blockdetect",
    .description   = NULL_IF_CONFIG_SMALL("Blockdetect filter."),
    .priv_size     = sizeof(BLKContext),
    .uninit        = blockdetect_uninit,
    FILTER_PIXFMTS_ARRAY(pix_fmts),
    FILTER_INPUTS(blockdetect_inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
    .priv_class    = &blockdetect_class,
    .flags         = AVFILTER_FLAG_METADATA_ONLY,
}

Definition at line 279 of file vf_blockdetect.c.