vf_delogo.c File Reference

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

#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.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.
static const char * delogo_get_name (void *ctx)
static int query_formats (AVFilterContext *ctx)
static av_cold int init (AVFilterContext *ctx, const char *args, void *opaque)
static void start_frame (AVFilterLink *inlink, AVFilterBufferRef *inpicref)
static void null_draw_slice (AVFilterLink *link, int y, int h, int slice_dir)
static void end_frame (AVFilterLink *inlink)

Variables

static const AVOption delogo_options []
static const AVClass delogo_class
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); \
}

Referenced by init().

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

Definition at line 134 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 51 of file vf_delogo.c.

Referenced by end_frame().

static const char* delogo_get_name ( void ctx)
static

Definition at line 147 of file vf_delogo.c.

static void end_frame ( AVFilterLink inlink)
static

Definition at line 234 of file vf_delogo.c.

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

Definition at line 171 of file vf_delogo.c.

static void null_draw_slice ( AVFilterLink link,
int  y,
int  h,
int  slice_dir 
)
static

Definition at line 232 of file vf_delogo.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 158 of file vf_delogo.c.

static void start_frame ( AVFilterLink inlink,
AVFilterBufferRef inpicref 
)
static

Definition at line 214 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,
.inputs = (AVFilterPad[]) {{ .name = "default",
.get_video_buffer = avfilter_null_get_video_buffer,
.start_frame = start_frame,
.draw_slice = null_draw_slice,
.end_frame = end_frame,
.min_perms = AV_PERM_WRITE | AV_PERM_READ,
.rej_perms = AV_PERM_PRESERVE },
{ .name = NULL}},
.outputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO, },
{ .name = NULL}},
}

Definition at line 265 of file vf_delogo.c.

const AVClass delogo_class
static
Initial value:
{
.class_name = "DelogoContext",
.item_name = delogo_get_name,
.option = delogo_options,
}

Definition at line 152 of file vf_delogo.c.

Referenced by init().

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

Definition at line 136 of file vf_delogo.c.