vf_cropdetect.c File Reference

border detection filter Ported from MPlayer libmpcodecs/vf_cropdetect.c. More...

#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

Classes
struct	CropDetectContext

Macros
#define	SET_META(key, value)   av_dict_set_int(metadata, key, value, 0)
#define	FIND(DST, FROM, NOEND, INC, STEP0, STEP1, LEN)
#define	OFFSET(x)   offsetof(CropDetectContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Typedefs
typedef struct CropDetectContext	CropDetectContext

Functions
	AVFILTER_DEFINE_CLASS (cropdetect)

Variables
AVFilter	ff_vf_cropdetect

Detailed Description

border detection filter Ported from MPlayer libmpcodecs/vf_cropdetect.c.

Macro Definition Documentation

FIND

#define FIND	(		DST,
			FROM,
			NOEND,
			INC,
			STEP0,
			STEP1,
			LEN
	)

Value:

outliers = 0;\
        for (last_y = y = FROM; NOEND; y = y INC) {\
            if (checkline(ctx, frame->data[0] + STEP0 * y, STEP1, LEN, bpp) > limit) {\
                if (++outliers > s->max_outliers) { \
                    DST = last_y;\
                    break;\
                }\
            } else\
                last_y = y INC;\
        }

Variable Documentation

ff_vf_cropdetect

AVFilter ff_vf_cropdetect

Initial value:

= {
    .name          = "cropdetect",
    .description   = NULL_IF_CONFIG_SMALL("Auto-detect crop size."),
    .priv_size     = sizeof(CropDetectContext),
    .priv_class    = &cropdetect_class,
    .init          = init,
    .query_formats = query_formats,
    .inputs        = avfilter_vf_cropdetect_inputs,
    .outputs       = avfilter_vf_cropdetect_outputs,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}