vf_edgedetect.c File Reference

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

Go to the source code of this file.

Data Structures
struct	plane_info
struct	EdgeDetectContext

Macros
#define	PLANE_R   0x4
#define	PLANE_G   0x1
#define	PLANE_B   0x2
#define	PLANE_Y   0x1
#define	PLANE_U   0x2
#define	PLANE_V   0x4
#define	PLANE_A   0x8
#define	OFFSET(x)   offsetof(EdgeDetectContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Enumerations
enum	FilterMode {   FILTER_8TAP_SMOOTH, FILTER_8TAP_REGULAR, FILTER_8TAP_SHARP, FILTER_BILINEAR,   N_FILTERS, FILTER_SWITCHABLE = N_FILTERS, MODE_WIRES, MODE_COLORMIX,   MODE_CANNY, NB_MODE, MODE_NONE, MODE_INTERLEAVE,   MODE_DEINTERLEAVE, FILTER_NONE = -1, FILTER_TOUT, FILTER_VREP,   FILTER_BRNG, FILT_NUMB }

Functions
	AVFILTER_DEFINE_CLASS (edgedetect)
static av_cold int	init (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_props (AVFilterLink *inlink)
static void	color_mix (int w, int h, uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	edgedetect_options []
static const AVFilterPad	edgedetect_inputs []
const AVFilter	ff_vf_edgedetect

Detailed Description

Edge detection filter

See also

https://en.wikipedia.org/wiki/Canny_edge_detector

Definition in file vf_edgedetect.c.

Macro Definition Documentation

PLANE_R

#define PLANE_R   0x4

Definition at line 37 of file vf_edgedetect.c.

PLANE_G

#define PLANE_G   0x1

Definition at line 38 of file vf_edgedetect.c.

PLANE_B

#define PLANE_B   0x2

Definition at line 39 of file vf_edgedetect.c.

PLANE_Y

#define PLANE_Y   0x1

Definition at line 40 of file vf_edgedetect.c.

PLANE_U

#define PLANE_U   0x2

Definition at line 41 of file vf_edgedetect.c.

PLANE_V

#define PLANE_V   0x4

Definition at line 42 of file vf_edgedetect.c.

PLANE_A

#define PLANE_A   0x8

Definition at line 43 of file vf_edgedetect.c.

OFFSET

#define OFFSET

(

x

)

offsetof(EdgeDetectContext, x)

Definition at line 69 of file vf_edgedetect.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 70 of file vf_edgedetect.c.

Enumeration Type Documentation

FilterMode

enum FilterMode

Enumerator
FILTER_8TAP_SMOOTH
FILTER_8TAP_REGULAR
FILTER_8TAP_SHARP
FILTER_BILINEAR
N_FILTERS
FILTER_SWITCHABLE
MODE_WIRES
MODE_COLORMIX
MODE_CANNY
NB_MODE
MODE_NONE
MODE_INTERLEAVE
MODE_DEINTERLEAVE
FILTER_NONE
FILTER_TOUT
FILTER_VREP
FILTER_BRNG
FILT_NUMB

Definition at line 45 of file vf_edgedetect.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

edgedetect

)

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 90 of file vf_edgedetect.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 99 of file vf_edgedetect.c.

config_props()

static int config_props ( AVFilterLink *  inlink )

static

Definition at line 119 of file vf_edgedetect.c.

color_mix()

static void color_mix ( int  w, int  h, uint8_t *  dst, int  dst_linesize, const uint8_t *  src, int  src_linesize  )

static

Definition at line 143 of file vf_edgedetect.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 157 of file vf_edgedetect.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 230 of file vf_edgedetect.c.

Variable Documentation

edgedetect_options

const AVOption edgedetect_options[]

static

Initial value:

= {
    { "high", "set high threshold", OFFSET(high), AV_OPT_TYPE_DOUBLE, {.dbl=50/255.}, 0, 1, FLAGS },
    { "low",  "set low threshold",  OFFSET(low),  AV_OPT_TYPE_DOUBLE, {.dbl=20/255.}, 0, 1, FLAGS },
    { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_WIRES}, 0, NB_MODE-1, FLAGS, "mode" },
        { "wires",    "white/gray wires on black",  0, AV_OPT_TYPE_CONST, {.i64=MODE_WIRES},    INT_MIN, INT_MAX, FLAGS, "mode" },
        { "colormix", "mix colors",                 0, AV_OPT_TYPE_CONST, {.i64=MODE_COLORMIX}, INT_MIN, INT_MAX, FLAGS, "mode" },
        { "canny",    "detect edges on planes",     0, AV_OPT_TYPE_CONST, {.i64=MODE_CANNY},    INT_MIN, INT_MAX, FLAGS, "mode" },
    { "planes", "set planes to filter",  OFFSET(filter_planes), AV_OPT_TYPE_FLAGS, {.i64=7}, 1, 0x7, FLAGS, "flags" },
        { "y", "filter luma plane",  0, AV_OPT_TYPE_CONST, {.i64=PLANE_Y}, 0, 0, FLAGS, "flags" },
        { "u", "filter u plane",     0, AV_OPT_TYPE_CONST, {.i64=PLANE_U}, 0, 0, FLAGS, "flags" },
        { "v", "filter v plane",     0, AV_OPT_TYPE_CONST, {.i64=PLANE_V}, 0, 0, FLAGS, "flags" },
        { "r", "filter red plane",   0, AV_OPT_TYPE_CONST, {.i64=PLANE_R}, 0, 0, FLAGS, "flags" },
        { "g", "filter green plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_G}, 0, 0, FLAGS, "flags" },
        { "b", "filter blue plane",  0, AV_OPT_TYPE_CONST, {.i64=PLANE_B}, 0, 0, FLAGS, "flags" },
    { NULL }
}

Definition at line 71 of file vf_edgedetect.c.

edgedetect_inputs

const AVFilterPad edgedetect_inputs[]

static

Initial value:

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

Definition at line 243 of file vf_edgedetect.c.

ff_vf_edgedetect

const AVFilter ff_vf_edgedetect

Initial value:

= {
    .name          = "edgedetect",
    .description   = NULL_IF_CONFIG_SMALL("Detect and draw edge."),
    .priv_size     = sizeof(EdgeDetectContext),
    .init          = init,
    .uninit        = uninit,
    FILTER_INPUTS(edgedetect_inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
    FILTER_QUERY_FUNC(query_formats),
    .priv_class    = &edgedetect_class,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}

Definition at line 252 of file vf_edgedetect.c.