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,
}

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 }
}

Definition at line 127 of file vf_drawbox.c.

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

Definition at line 140 of file vf_drawbox.c.