FFmpeg
Data Structures | Macros | Enumerations | Functions | Variables
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 []
 
static const AVFilterPad edgedetect_outputs []
 
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

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",
.config_props = config_props,
.filter_frame = filter_frame,
},
}

Definition at line 243 of file vf_edgedetect.c.

◆ edgedetect_outputs

const AVFilterPad edgedetect_outputs[]
static
Initial value:
= {
{
.name = "default",
},
}

Definition at line 252 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,
.priv_class = &edgedetect_class,
}

Definition at line 259 of file vf_edgedetect.c.

PLANE_B
#define PLANE_B
Definition: vf_edgedetect.c:39
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:167
MODE_COLORMIX
@ MODE_COLORMIX
Definition: vf_edgedetect.c:47
PLANE_V
#define PLANE_V
Definition: vf_edgedetect.c:42
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:227
MODE_CANNY
@ MODE_CANNY
Definition: vf_edgedetect.c:48
MODE_WIRES
@ MODE_WIRES
Definition: vf_edgedetect.c:46
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:190
edgedetect_inputs
static const AVFilterPad edgedetect_inputs[]
Definition: vf_edgedetect.c:243
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_edgedetect.c:90
NULL
#define NULL
Definition: coverity.c:32
PLANE_G
#define PLANE_G
Definition: vf_edgedetect.c:38
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_edgedetect.c:157
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_edgedetect.c:230
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:115
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:152
PLANE_R
#define PLANE_R
Definition: vf_edgedetect.c:37
config_props
static int config_props(AVFilterLink *inlink)
Definition: vf_edgedetect.c:119
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_edgedetect.c:99
PLANE_Y
#define PLANE_Y
Definition: vf_edgedetect.c:40
mode
mode
Definition: ebur128.h:83
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
OFFSET
#define OFFSET(x)
Definition: vf_edgedetect.c:69
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
FLAGS
#define FLAGS
Definition: vf_edgedetect.c:70
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:191
PLANE_U
#define PLANE_U
Definition: vf_edgedetect.c:41
AV_OPT_TYPE_FLAGS
@ AV_OPT_TYPE_FLAGS
Definition: opt.h:224
NB_MODE
@ NB_MODE
Definition: vf_edgedetect.c:49
edgedetect_outputs
static const AVFilterPad edgedetect_outputs[]
Definition: vf_edgedetect.c:252
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
EdgeDetectContext
Definition: vf_edgedetect.c:59