vf_unsharp.c File Reference

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

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

Go to the source code of this file.

Data Structures
struct	UnsharpFilterParam
struct	UnsharpContext
struct	ThreadData
	Used for passing data between threads. More...

Macros
#define	MIN_MATRIX_SIZE   3
#define	MAX_MATRIX_SIZE   63
#define	DEF_UNSHARP_SLICE_FUNC(name, nbits)
#define	MAX_SCALEBITS   25
#define	SET_FILTER_PARAM(name_, short_)
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	MIN_SIZE   3
#define	MAX_SIZE   23

Functions
static int	apply_unsharp (AVFilterContext *ctx, AVFrame *in, AVFrame *out)
static int	set_filter_param (AVFilterContext *ctx, const char *name, const char *short_name, UnsharpFilterParam *fp, int msize_x, int msize_y, float amount)
static av_cold int	init (AVFilterContext *ctx)
static int	init_filter_param (AVFilterContext *ctx, UnsharpFilterParam *fp, const char *effect_type, int width)
static int	config_input (AVFilterLink *inlink)
static void	free_filter_param (UnsharpFilterParam *fp, int nb_threads)
static av_cold void	uninit (AVFilterContext *ctx)
static int	filter_frame (AVFilterLink *link, AVFrame *in)
	AVFILTER_DEFINE_CLASS (unsharp)

Variables
static enum AVPixelFormat	pix_fmts []
static const AVOption	unsharp_options []
static const AVFilterPad	avfilter_vf_unsharp_inputs []
const FFFilter	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

Definition in file vf_unsharp.c.

Macro Definition Documentation

MIN_MATRIX_SIZE

#define MIN_MATRIX_SIZE   3

Definition at line 48 of file vf_unsharp.c.

MAX_MATRIX_SIZE

#define MAX_MATRIX_SIZE   63

Definition at line 49 of file vf_unsharp.c.

Referenced by init_filter_param().

DEF_UNSHARP_SLICE_FUNC

#define DEF_UNSHARP_SLICE_FUNC	(		name,
			nbits )

Definition at line 90 of file vf_unsharp.c.

MAX_SCALEBITS

#define MAX_SCALEBITS   25

Definition at line 204 of file vf_unsharp.c.

Referenced by set_filter_param().

SET_FILTER_PARAM

#define SET_FILTER_PARAM	(		name_,
			short_ )

Value:

    ret = set_filter_param(ctx, #name_, #short_, &s->name_,             \
                           s->short_##msize_x, s->short_##msize_y, s->short_##amount); \
    if (ret < 0)                                                        \
        return ret;                                                     \

Referenced by init().

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(UnsharpContext, x)

Definition at line 360 of file vf_unsharp.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 361 of file vf_unsharp.c.

MIN_SIZE

#define MIN_SIZE   3

Definition at line 362 of file vf_unsharp.c.

MAX_SIZE

#define MAX_SIZE   23

Definition at line 363 of file vf_unsharp.c.

Function Documentation

apply_unsharp()

static int apply_unsharp ( AVFilterContext * ctx, AVFrame * in, AVFrame * out )

static

Definition at line 175 of file vf_unsharp.c.

Referenced by apply_unsharp(), and filter_frame().

set_filter_param()

static int set_filter_param ( AVFilterContext * ctx, const char * name, const char * short_name, UnsharpFilterParam * fp, int msize_x, int msize_y, float amount )

static

Definition at line 206 of file vf_unsharp.c.

init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 227 of file vf_unsharp.c.

init_filter_param()

static int init_filter_param ( AVFilterContext * ctx, UnsharpFilterParam * fp, const char * effect_type, int width )

static

Definition at line 259 of file vf_unsharp.c.

Referenced by config_input().

config_input()

static int config_input ( AVFilterLink * inlink )

static

Definition at line 288 of file vf_unsharp.c.

free_filter_param()

static void free_filter_param ( UnsharpFilterParam * fp, int nb_threads )

static

Definition at line 316 of file vf_unsharp.c.

Referenced by uninit().

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 328 of file vf_unsharp.c.

filter_frame()

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

static

Definition at line 336 of file vf_unsharp.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

unsharp

)

Variable Documentation

pix_fmts

enum AVPixelFormat pix_fmts[]

static

Initial value:

= {
    AV_PIX_FMT_YUVA420P,  AV_PIX_FMT_YUVA422P,   AV_PIX_FMT_YUVA444P,
    AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
    AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
    AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
    AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P,  AV_PIX_FMT_YUV410P,
    AV_PIX_FMT_YUV411P,  AV_PIX_FMT_YUV440P,  AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
    AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
    AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV440P10,
    AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
    AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
    AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_NONE
}

Definition at line 245 of file vf_unsharp.c.

unsharp_options

const AVOption unsharp_options[]

static

Initial value:

= {
    { "luma_msize_x",   "set luma matrix horizontal size",   OFFSET(lmsize_x), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
    { "lx",             "set luma matrix horizontal size",   OFFSET(lmsize_x), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
    { "luma_msize_y",   "set luma matrix vertical size",     OFFSET(lmsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
    { "ly",             "set luma matrix vertical size",     OFFSET(lmsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
    { "luma_amount",    "set luma effect strength",          OFFSET(lamount),  AV_OPT_TYPE_FLOAT, { .dbl = 1 },       -2,        5, FLAGS },
    { "la",             "set luma effect strength",          OFFSET(lamount),  AV_OPT_TYPE_FLOAT, { .dbl = 1 },       -2,        5, FLAGS },
    { "chroma_msize_x", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
    { "cx",             "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
    { "chroma_msize_y", "set chroma matrix vertical size",   OFFSET(cmsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
    { "cy",             "set chroma matrix vertical size",   OFFSET(cmsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
    { "chroma_amount",  "set chroma effect strength",        OFFSET(camount),  AV_OPT_TYPE_FLOAT, { .dbl = 0 },       -2,        5, FLAGS },
    { "ca",             "set chroma effect strength",        OFFSET(camount),  AV_OPT_TYPE_FLOAT, { .dbl = 0 },       -2,        5, FLAGS },
    { "alpha_msize_x",  "set alpha matrix horizontal size",  OFFSET(amsize_x), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
    { "ax",             "set alpha matrix horizontal size",  OFFSET(amsize_x), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
    { "alpha_msize_y",  "set alpha matrix vertical size",    OFFSET(amsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
    { "ay",             "set alpha matrix vertical size",    OFFSET(amsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
    { "alpha_amount",   "set alpha effect strength",         OFFSET(aamount),  AV_OPT_TYPE_FLOAT, { .dbl = 0 },       -2,        5, FLAGS },
    { "aa",             "set alpha effect strength",         OFFSET(aamount),  AV_OPT_TYPE_FLOAT, { .dbl = 0 },       -2,        5, FLAGS },
    { NULL }
}

Definition at line 364 of file vf_unsharp.c.

avfilter_vf_unsharp_inputs

const AVFilterPad avfilter_vf_unsharp_inputs[]

static

Initial value:

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

Definition at line 388 of file vf_unsharp.c.

ff_vf_unsharp

const FFFilter ff_vf_unsharp

Initial value:

= {
    .p.name        = "unsharp",
    .p.description = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."),
    .p.priv_class  = &unsharp_class,
    .p.flags       = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
    .priv_size     = sizeof(UnsharpContext),
    .init          = init,
    .uninit        = uninit,
    FILTER_INPUTS(avfilter_vf_unsharp_inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
    FILTER_PIXFMTS_ARRAY(pix_fmts),
}

Definition at line 397 of file vf_unsharp.c.