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vf_delogo.c File Reference

A very simple tv station logo remover Originally imported from MPlayer libmpcodecs/vf_delogo.c, the algorithm was later improved. More...

#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures

struct  DelogoContext
 

Macros

#define OFFSET(x)   offsetof(DelogoContext, x)
 
#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
 
#define CHECK_UNSET_OPT(opt)
 

Functions

static void apply_delogo (uint8_t *dst, int dst_linesize, uint8_t *src, int src_linesize, int w, int h, AVRational sar, int logo_x, int logo_y, int logo_w, int logo_h, unsigned int band, int show, int direct)
 Apply a simple delogo algorithm to the image in src and put the result in dst.
 
 AVFILTER_DEFINE_CLASS (delogo)
 
static int query_formats (AVFilterContext *ctx)
 
static av_cold int init (AVFilterContext *ctx)
 
static int filter_frame (AVFilterLink *inlink, AVFrame *in)
 

Variables

static const AVOption delogo_options []
 
static const AVFilterPad avfilter_vf_delogo_inputs []
 
static const AVFilterPad avfilter_vf_delogo_outputs []
 
AVFilter ff_vf_delogo
 

Detailed Description

A very simple tv station logo remover Originally imported from MPlayer libmpcodecs/vf_delogo.c, the algorithm was later improved.

Definition in file vf_delogo.c.

Macro Definition Documentation

#define OFFSET (   x)    offsetof(DelogoContext, x)

Definition at line 156 of file vf_delogo.c.

Definition at line 157 of file vf_delogo.c.

#define CHECK_UNSET_OPT (   opt)
Value:
if (s->opt == -1) { \
av_log(s, AV_LOG_ERROR, "Option %s was not set.\n", #opt); \
return AVERROR(EINVAL); \
}

Referenced by init().

Function Documentation

static void apply_delogo ( uint8_t dst,
int  dst_linesize,
uint8_t src,
int  src_linesize,
int  w,
int  h,
AVRational  sar,
int  logo_x,
int  logo_y,
int  logo_w,
int  logo_h,
unsigned int  band,
int  show,
int  direct 
)
static

Apply a simple delogo algorithm to the image in src and put the result in dst.

The algorithm is only applied to the region specified by the logo parameters.

Parameters
wwidth of the input image
hheight of the input image
logo_xx coordinate of the top left corner of the logo region
logo_yy coordinate of the top left corner of the logo region
logo_wwidth of the logo
logo_hheight of the logo
bandthe size of the band around the processed area
showshow a rectangle around the processed area, useful for parameters tweaking
directif non-zero perform in-place processing

Definition at line 57 of file vf_delogo.c.

Referenced by filter_frame().

AVFILTER_DEFINE_CLASS ( delogo  )
static int query_formats ( AVFilterContext ctx)
static

Definition at line 172 of file vf_delogo.c.

static av_cold int init ( AVFilterContext ctx)
static

Definition at line 186 of file vf_delogo.c.

static int filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 211 of file vf_delogo.c.

Variable Documentation

const AVOption delogo_options[]
static
Initial value:
= {
{ "x", "set logo x position", OFFSET(x), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
{ "y", "set logo y position", OFFSET(y), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
{ "w", "set logo width", OFFSET(w), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
{ "h", "set logo height", OFFSET(h), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
{ "band", "set delogo area band size", OFFSET(band), AV_OPT_TYPE_INT, { .i64 = 4 }, 1, INT_MAX, FLAGS },
{ "t", "set delogo area band size", OFFSET(band), AV_OPT_TYPE_INT, { .i64 = 4 }, 1, INT_MAX, FLAGS },
{ "show", "show delogo area", OFFSET(show), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
{ NULL }
}

Definition at line 159 of file vf_delogo.c.

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

Definition at line 264 of file vf_delogo.c.

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

Definition at line 273 of file vf_delogo.c.

AVFilter ff_vf_delogo
Initial value:
= {
.name = "delogo",
.description = NULL_IF_CONFIG_SMALL("Remove logo from input video."),
.priv_size = sizeof(DelogoContext),
.priv_class = &delogo_class,
.init = init,
}

Definition at line 281 of file vf_delogo.c.