vf_drawbox.c File Reference

Box drawing filter. More...

#include "libavutil/colorspace.h"
#include "libavutil/common.h"
#include "libavutil/pixdesc.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures

struct  DrawBoxContext
 

Enumerations

enum  { Y, U, V, A }
 

Functions

static av_cold int init (AVFilterContext *ctx, const char *args)
 
static int query_formats (AVFilterContext *ctx)
 
static int config_input (AVFilterLink *inlink)
 
static int filter_frame (AVFilterLink *inlink, AVFilterBufferRef *frame)
 

Variables

static const AVFilterPad avfilter_vf_drawbox_inputs []
 
static const AVFilterPad avfilter_vf_drawbox_outputs []
 
AVFilter avfilter_vf_drawbox
 

Detailed Description

Box drawing filter.

Also a nice template for a filter that needs to write in the input frame.

Definition in file vf_drawbox.c.

Enumeration Type Documentation

anonymous enum
Enumerator
Y 
U 
V 
A 

Definition at line 36 of file vf_drawbox.c.

Function Documentation

static int config_input ( AVFilterLink inlink)
static

Definition at line 81 of file vf_drawbox.c.

static int filter_frame ( AVFilterLink inlink,
AVFilterBufferRef frame 
)
static

Definition at line 99 of file vf_drawbox.c.

static av_cold int init ( AVFilterContext ctx,
const char *  args 
)
static

Definition at line 44 of file vf_drawbox.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 67 of file vf_drawbox.c.

Variable Documentation

AVFilter avfilter_vf_drawbox
Initial value:
= {
.name = "drawbox",
.description = NULL_IF_CONFIG_SMALL("Draw a colored box on the input video."),
.priv_size = sizeof(DrawBoxContext),
.init = init,
}
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:122
static int query_formats(AVFilterContext *ctx)
Definition: vf_drawbox.c:67
static const AVFilterPad avfilter_vf_drawbox_outputs[]
Definition: vf_drawbox.c:140
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
static const AVFilterPad avfilter_vf_drawbox_inputs[]
Definition: vf_drawbox.c:127
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:110
static av_cold int init(AVFilterContext *ctx, const char *args)
Definition: vf_drawbox.c:44

Definition at line 148 of file vf_drawbox.c.

const AVFilterPad avfilter_vf_drawbox_inputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_input,
.get_video_buffer = ff_null_get_video_buffer,
.filter_frame = filter_frame,
.min_perms = AV_PERM_WRITE | AV_PERM_READ,
.rej_perms = AV_PERM_PRESERVE
},
{ NULL }
}
#define AV_PERM_READ
can read from the buffer
Definition: avfilter.h:97
static int config_input(AVFilterLink *inlink)
Definition: vf_drawbox.c:81
static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *frame)
Definition: vf_drawbox.c:99
NULL
Definition: eval.c:52
#define AV_PERM_PRESERVE
nobody else can overwrite the buffer
Definition: avfilter.h:99
#define AV_PERM_WRITE
can write to the buffer
Definition: avfilter.h:98
AVFilterBufferRef * ff_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
Definition: video.c:72

Definition at line 127 of file vf_drawbox.c.

const AVFilterPad avfilter_vf_drawbox_outputs[]
static
Initial value:
= {
{
.name = "default",
},
{ NULL }
}
NULL
Definition: eval.c:52

Definition at line 140 of file vf_drawbox.c.