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, 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	avfilter_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 155 of file vf_delogo.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 156 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, 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

w	width of the input image
h	height of the input image
logo_x	x coordinate of the top left corner of the logo region
logo_y	y coordinate of the top left corner of the logo region
logo_w	width of the logo
logo_h	height of the logo
band	the size of the band around the processed area
show	show a rectangle around the processed area, useful for parameters tweaking
direct	if 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 171 of file vf_delogo.c.

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 184 of file vf_delogo.c.

static int filter_frame ( AVFilterLink *  inlink, AVFrame *  in  )

static

Definition at line 209 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 158 of file vf_delogo.c.

const AVFilterPad avfilter_vf_delogo_inputs[]

static

Initial value:

= {
    {
        .name             = "default",
        .type             = AVMEDIA_TYPE_VIDEO,
        .get_video_buffer = ff_null_get_video_buffer,
        .filter_frame     = filter_frame,
    },
    { NULL }
}

Definition at line 262 of file vf_delogo.c.

const AVFilterPad avfilter_vf_delogo_outputs[]

static

Initial value:

= {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
    },
    { NULL }
}

Definition at line 272 of file vf_delogo.c.

AVFilter avfilter_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,
    .query_formats = query_formats,

    .inputs    = avfilter_vf_delogo_inputs,
    .outputs   = avfilter_vf_delogo_outputs,
    .flags     = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}

Definition at line 280 of file vf_delogo.c.