vf_alphamerge.c File Reference

#include <string.h>
#include "libavutil/imgutils.h"
#include "libavutil/pixfmt.h"
#include "avfilter.h"
#include "drawutils.h"
#include "formats.h"
#include "filters.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	query_formats (AVFilterContext *ctx)
static int	config_input_main (AVFilterLink *inlink)
static int	config_output (AVFilterLink *outlink)
static void	draw_frame (AVFilterContext *ctx, AVFrame *main_buf, AVFrame *alpha_buf)
static int	activate (AVFilterContext *ctx)

Variables
static const AVFilterPad	alphamerge_inputs []
static const AVFilterPad	alphamerge_outputs []
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 37 of file vf_alphamerge.c.

Function Documentation

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 46 of file vf_alphamerge.c.

config_input_main()

static int config_input_main ( AVFilterLink *  inlink )

static

Definition at line 78 of file vf_alphamerge.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 87 of file vf_alphamerge.c.

draw_frame()

static void draw_frame ( AVFilterContext *  ctx, AVFrame *  main_buf, AVFrame *  alpha_buf  )

static

Definition at line 108 of file vf_alphamerge.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 136 of file vf_alphamerge.c.

Variable Documentation

alphamerge_inputs

const AVFilterPad alphamerge_inputs[]

static

Initial value:

= {
    {
        .name             = "main",
        .type             = AVMEDIA_TYPE_VIDEO,
        .config_props     = config_input_main,
        .needs_writable   = 1,
    },{
        .name             = "alpha",
        .type             = AVMEDIA_TYPE_VIDEO,
    },
    { NULL }
}

Definition at line 184 of file vf_alphamerge.c.

alphamerge_outputs

const AVFilterPad alphamerge_outputs[]

static

Initial value:

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

Definition at line 197 of file vf_alphamerge.c.

ff_vf_alphamerge

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."),
    .priv_size      = sizeof(AlphaMergeContext),
    .query_formats  = query_formats,
    .inputs         = alphamerge_inputs,
    .outputs        = alphamerge_outputs,
    .activate       = activate,
}

Definition at line 206 of file vf_alphamerge.c.