vf_delogo.c File Reference

A very simple tv station logo remover Ported from MPlayer libmpcodecs/vf_delogo.c. 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 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, int logo_x, int logo_y, int logo_w, int logo_h, int band, int show, int direct)
 Apply a simple delogo algorithm to the image in dst and put the result in src. More...
 
static const char * delogo_get_name (void *ctx)
 
static int query_formats (AVFilterContext *ctx)
 
static av_cold int init (AVFilterContext *ctx, const char *args)
 
static int filter_frame (AVFilterLink *inlink, AVFilterBufferRef *in)
 

Variables

static const AVOption delogo_options []
 
static const AVClass delogo_class
 
static const AVFilterPad avfilter_vf_delogo_inputs []
 
static const AVFilterPad avfilter_vf_delogo_outputs []
 
AVFilter avfilter_vf_delogo
 

Detailed Description

A very simple tv station logo remover Ported from MPlayer libmpcodecs/vf_delogo.c.

Definition in file vf_delogo.c.

Macro Definition Documentation

#define CHECK_UNSET_OPT (   opt)
Value:
if (delogo->opt == -1) { \
av_log(delogo, AV_LOG_ERROR, "Option %s was not set.\n", #opt); \
return AVERROR(EINVAL); \
}
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:146
return

Referenced by init().

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

Definition at line 138 of file vf_delogo.c.

Function Documentation

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

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

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 55 of file vf_delogo.c.

Referenced by filter_frame().

static const char* delogo_get_name ( void ctx)
static

Definition at line 151 of file vf_delogo.c.

static int filter_frame ( AVFilterLink inlink,
AVFilterBufferRef in 
)
static

Definition at line 218 of file vf_delogo.c.

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

Definition at line 175 of file vf_delogo.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 162 of file vf_delogo.c.

Variable Documentation

AVFilter avfilter_vf_delogo
Initial value:
= {
.name = "delogo",
.description = NULL_IF_CONFIG_SMALL("Remove logo from input video."),
.priv_size = sizeof(DelogoContext),
.init = init,
}
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:122
static int query_formats(AVFilterContext *ctx)
Definition: vf_delogo.c:162
static av_cold int init(AVFilterContext *ctx, const char *args)
Definition: vf_delogo.c:175
static const AVFilterPad avfilter_vf_delogo_outputs[]
Definition: vf_delogo.c:275
#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 inputs[]
Definition: af_ashowinfo.c:110
static const AVFilterPad avfilter_vf_delogo_inputs[]
Definition: vf_delogo.c:263

Definition at line 283 of file vf_delogo.c.

const AVFilterPad avfilter_vf_delogo_inputs[]
static
Initial value:
= {
{
.name = "default",
.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 filter_frame(AVFilterLink *inlink, AVFilterBufferRef *in)
Definition: vf_delogo.c:218
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 263 of file vf_delogo.c.

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

Definition at line 275 of file vf_delogo.c.

const AVClass delogo_class
static
Initial value:
= {
.class_name = "DelogoContext",
.item_name = delogo_get_name,
.option = delogo_options,
}
static const char * delogo_get_name(void *ctx)
Definition: vf_delogo.c:151
static const AVOption delogo_options[]
Definition: vf_delogo.c:140

Definition at line 156 of file vf_delogo.c.

Referenced by init().

const AVOption delogo_options[]
static
Initial value:
= {
{"x", "set logo x position", OFFSET(x), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX },
{"y", "set logo y position", OFFSET(y), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX },
{"w", "set logo width", OFFSET(w), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX },
{"h", "set logo height", OFFSET(h), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX },
{"band", "set delogo area band size", OFFSET(band), AV_OPT_TYPE_INT, {.i64 = 4}, -1, INT_MAX },
{"t", "set delogo area band size", OFFSET(band), AV_OPT_TYPE_INT, {.i64 = 4}, -1, INT_MAX },
{"show", "show delogo area", OFFSET(show), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1 },
{NULL},
}
#define OFFSET(x)
Definition: vf_delogo.c:138
NULL
Definition: eval.c:52

Definition at line 140 of file vf_delogo.c.