vf_alphamerge.c File Reference

#include <string.h>
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixfmt.h"
#include "avfilter.h"
#include "drawutils.h"
#include "formats.h"
#include "filters.h"
#include "framesync.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	AlphaMergeContext

Enumerations
enum	{ Y, U, V, A }

Functions
static int	do_alphamerge (FFFrameSync *fs)
static av_cold int	init (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_input_main (AVFilterLink *inlink)
static int	config_output (AVFilterLink *outlink)
static int	activate (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
	FRAMESYNC_DEFINE_CLASS (alphamerge, AlphaMergeContext, fs)

Variables
static const AVFilterPad	alphamerge_inputs []
static const AVFilterPad	alphamerge_outputs []
static const AVOption	alphamerge_options []
const AVFilter	ff_vf_alphamerge

Detailed Description

copy an alpha component from another video's luma

Definition in file vf_alphamerge.c.

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
Y
U
V
A

Definition at line 39 of file vf_alphamerge.c.

Function Documentation

do_alphamerge()

static int do_alphamerge ( FFFrameSync *  fs )

static

Definition at line 50 of file vf_alphamerge.c.

Referenced by init().

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 92 of file vf_alphamerge.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 100 of file vf_alphamerge.c.

config_input_main()

static int config_input_main ( AVFilterLink *  inlink )

static

Definition at line 120 of file vf_alphamerge.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 129 of file vf_alphamerge.c.

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 157 of file vf_alphamerge.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 163 of file vf_alphamerge.c.

FRAMESYNC_DEFINE_CLASS()

FRAMESYNC_DEFINE_CLASS	(	alphamerge	,
		AlphaMergeContext	,
		fs
	)

Variable Documentation

alphamerge_inputs

const AVFilterPad alphamerge_inputs[]

static

Initial value:

= {
    {
        .name             = "main",
        .type             = AVMEDIA_TYPE_VIDEO,
        .config_props     = config_input_main,
    },{
        .name             = "alpha",
        .type             = AVMEDIA_TYPE_VIDEO,
    },
}

Definition at line 170 of file vf_alphamerge.c.

alphamerge_outputs

const AVFilterPad alphamerge_outputs[]

static

Initial value:

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

Definition at line 181 of file vf_alphamerge.c.

alphamerge_options

const AVOption alphamerge_options[]

static

Initial value:

= {
    { NULL }
}

Definition at line 189 of file vf_alphamerge.c.

ff_vf_alphamerge

const AVFilter ff_vf_alphamerge

Initial value:

= {
    .name           = "alphamerge",
    .description    = NULL_IF_CONFIG_SMALL("Copy the luma value of the second "
                      "input into the alpha channel of the first input."),
    .preinit        = alphamerge_framesync_preinit,
    .priv_size      = sizeof(AlphaMergeContext),
    .priv_class     = &alphamerge_class,
    .init           = init,
    FILTER_INPUTS(alphamerge_inputs),
    FILTER_OUTPUTS(alphamerge_outputs),
    FILTER_QUERY_FUNC(query_formats),
    .uninit         = uninit,
    .activate       = activate,
    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
}

Definition at line 195 of file vf_alphamerge.c.