vf_overlay.c File Reference

overlay one video on top of another More...

#include "avfilter.h"
#include "formats.h"
#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/avstring.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/timestamp.h"
#include "internal.h"
#include "drawutils.h"
#include "framesync.h"
#include "video.h"
#include "vf_overlay.h"

Classes
struct	ThreadData
	Used for passing data between threads. More...

Macros
#define	MAIN   0
#define	OVERLAY   1
#define	R   0
#define	G   1
#define	B   2
#define	A   3
#define	Y   0
#define	U   1
#define	V   2
#define	FAST_DIV255(x)   ((((x) + 128) * 257) >> 16)
#define	UNPREMULTIPLY_ALPHA(x, y)   ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)))
#define	OFFSET(x)   offsetof(OverlayContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Typedefs
typedef struct ThreadData	ThreadData

Enumerations
enum	EvalMode {   EVAL_MODE_ONCE, EVAL_MODE_FRAME, EVAL_MODE_NB, EVAL_MODE_INIT,   EVAL_MODE_FRAME, EVAL_MODE_NB, EVAL_MODE_INIT, EVAL_MODE_FRAME,   EVAL_MODE_NB, EVAL_MODE_INIT, EVAL_MODE_FRAME, EVAL_MODE_NB,   EVAL_MODE_INIT, EVAL_MODE_FRAME, EVAL_MODE_NB, EVAL_MODE_INIT,   EVAL_MODE_FRAME, EVAL_MODE_NB, EVAL_MODE_INIT, EVAL_MODE_FRAME,   EVAL_MODE_NB }

Functions
	FRAMESYNC_DEFINE_CLASS (overlay, OverlayContext, fs)

Variables
AVFilter	ff_vf_overlay

Detailed Description

overlay one video on top of another

Variable Documentation

ff_vf_overlay

AVFilter ff_vf_overlay

Initial value:

= {
    .name          = "overlay",
    .description   = NULL_IF_CONFIG_SMALL("Overlay a video source on top of the input."),
    .preinit       = overlay_framesync_preinit,
    .init          = init,
    .uninit        = uninit,
    .priv_size     = sizeof(OverlayContext),
    .priv_class    = &overlay_class,
    .query_formats = query_formats,
    .activate      = activate,
    .process_command = process_command,
    .inputs        = avfilter_vf_overlay_inputs,
    .outputs       = avfilter_vf_overlay_outputs,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
                     AVFILTER_FLAG_SLICE_THREADS,
}