vf_backgroundkey.c File Reference

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

Go to the source code of this file.

Data Structures
struct	BackgroundkeyContext

Macros
#define	OFFSET(x)   offsetof(BackgroundkeyContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Functions
static int	do_backgroundkey_slice (AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
static int	do_backgroundkey16_slice (AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
static int	filter_frame (AVFilterLink *link, AVFrame *frame)
static av_cold int	config_output (AVFilterLink *outlink)
static av_cold void	uninit (AVFilterContext *ctx)
	AVFILTER_DEFINE_CLASS (backgroundkey)

Variables
static const AVFilterPad	backgroundkey_inputs []
static const AVFilterPad	backgroundkey_outputs []
static const AVOption	backgroundkey_options []
static enum AVPixelFormat	backgroundkey_fmts []
const AVFilter	ff_vf_backgroundkey

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(BackgroundkeyContext, x)

Definition at line 218 of file vf_backgroundkey.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 219 of file vf_backgroundkey.c.

Function Documentation

do_backgroundkey_slice()

static int do_backgroundkey_slice ( AVFilterContext *  avctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 46 of file vf_backgroundkey.c.

Referenced by config_output().

do_backgroundkey16_slice()

static int do_backgroundkey16_slice ( AVFilterContext *  avctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 89 of file vf_backgroundkey.c.

Referenced by config_output().

filter_frame()

static int filter_frame ( AVFilterLink *  link, AVFrame *  frame  )

static

Definition at line 133 of file vf_backgroundkey.c.

config_output()

static av_cold int config_output ( AVFilterLink *  outlink )

static

Definition at line 169 of file vf_backgroundkey.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 193 of file vf_backgroundkey.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

backgroundkey

)

Variable Documentation

backgroundkey_inputs

const AVFilterPad backgroundkey_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .flags        = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
        .filter_frame = filter_frame,
    },
}

Definition at line 201 of file vf_backgroundkey.c.

backgroundkey_outputs

const AVFilterPad backgroundkey_outputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_output,
    },
}

Definition at line 210 of file vf_backgroundkey.c.

backgroundkey_options

const AVOption backgroundkey_options[]

static

Initial value:

= {
    { "threshold",  "set the scene change threshold", OFFSET(threshold),  AV_OPT_TYPE_FLOAT, { .dbl = 0.08}, 0.0, 1.0, FLAGS },
    { "similarity", "set the similarity",             OFFSET(similarity), AV_OPT_TYPE_FLOAT, { .dbl = 0.1 }, 0.0, 1.0, FLAGS },
    { "blend",      "set the blend value",            OFFSET(blend),      AV_OPT_TYPE_FLOAT, { .dbl = 0.0 }, 0.0, 1.0, FLAGS },
    { NULL }
}

Definition at line 221 of file vf_backgroundkey.c.

backgroundkey_fmts

enum AVPixelFormat backgroundkey_fmts[]

static

Initial value:

= {
    AV_PIX_FMT_YUVA420P,
    AV_PIX_FMT_YUVA422P,
    AV_PIX_FMT_YUVA444P,
    AV_PIX_FMT_YUVA420P9,  AV_PIX_FMT_YUVA422P9,  AV_PIX_FMT_YUVA444P9,
    AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
    AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
    AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
    AV_PIX_FMT_GBRAP,
    AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
    AV_PIX_FMT_NONE
}

Definition at line 228 of file vf_backgroundkey.c.

ff_vf_backgroundkey

const AVFilter ff_vf_backgroundkey

Initial value:

= {
    .name            = "backgroundkey",
    .description     = NULL_IF_CONFIG_SMALL("Turns a static background into transparency."),
    .priv_size       = sizeof(BackgroundkeyContext),
    .priv_class      = &backgroundkey_class,
    .uninit          = uninit,
    FILTER_INPUTS(backgroundkey_inputs),
    FILTER_OUTPUTS(backgroundkey_outputs),
    FILTER_PIXFMTS_ARRAY(backgroundkey_fmts),
    .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
    .process_command = ff_filter_process_command,
}

Definition at line 243 of file vf_backgroundkey.c.