vf_unsharp.c File Reference

blur / sharpen filter, ported to FFmpeg from MPlayer libmpcodecs/unsharp.c. More...

#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "unsharp.h"

Macros
#define	OFFSET(x)   offsetof(UnsharpContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	MIN_SIZE   3
#define	MAX_SIZE   23

Functions
	AVFILTER_DEFINE_CLASS (unsharp)

Variables
AVFilter	ff_vf_unsharp

Detailed Description

blur / sharpen filter, ported to FFmpeg from MPlayer libmpcodecs/unsharp.c.

This code is based on:

An Efficient algorithm for Gaussian blur using finite-state machines Frederick M. Waltz and John W. V. Miller

SPIE Conf. on Machine Vision Systems for Inspection and Metrology VII Originally published Boston, Nov 98

http://www.engin.umd.umich.edu/~jwvm/ece581/21_GBlur.pdf

Variable Documentation

ff_vf_unsharp

AVFilter ff_vf_unsharp

Initial value:

= {
    .name          = "unsharp",
    .description   = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."),
    .priv_size     = sizeof(UnsharpContext),
    .priv_class    = &unsharp_class,
    .init          = init,
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = avfilter_vf_unsharp_inputs,
    .outputs       = avfilter_vf_unsharp_outputs,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}