libavfilter/vf_overlay.c File Reference

overlay one video on top of another More...

#include "avfilter.h"
#include "libavutil/eval.h"
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/mathematics.h"
#include "internal.h"
#include "drawutils.h"

Detailed Description

overlay one video on top of another

Definition in file vf_overlay.c.

Define Documentation

#define A 3

Definition at line 60 of file vf_overlay.c.

#define B 2

Definition at line 59 of file vf_overlay.c.

#define FAST_DIV255 ( x ) ((((x) + 128) * 257) >> 16)

Definition at line 338 of file vf_overlay.c.

Referenced by blend_slice(), and fill_picture_rgb().

#define G 1

Definition at line 58 of file vf_overlay.c.

#define MAIN 0

Definition at line 54 of file vf_overlay.c.

Referenced by config_input_overlay(), config_output(), Faac_encode_init(), query_formats(), and start_frame().

#define OFFSET ( x ) offsetof(OverlayContext, x)

Definition at line 87 of file vf_overlay.c.

#define OVERLAY 1

Definition at line 55 of file vf_overlay.c.

Referenced by avfilter_register_all(), config_input_overlay(), config_output(), query_formats(), start_frame(), and start_frame_overlay().

#define R 0

Definition at line 57 of file vf_overlay.c.

#define U 1

Definition at line 63 of file vf_overlay.c.

#define V 2

Definition at line 64 of file vf_overlay.c.

#define Y 0

Definition at line 62 of file vf_overlay.c.

Enumeration Type Documentation

enum var_name

Enumerator:

VAR_B1
VAR_B2
VAR_S1
VAR_S2
VAR_T1
VAR_T2
VAR_NB
VAR_N
VAR_T
VAR_S
VAR_VARS_NB
VAR_W
VAR_H
VAR_CW
VAR_CH
VAR_HSUB
VAR_VSUB
VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_X
VAR_Y
VAR_N
VAR_POS
VAR_T
VAR_VARS_NB
VAR_MAIN_W
VAR_w
VAR_W
VAR_MAIN_H
VAR_h
VAR_H
VAR_TW
VAR_TEXT_W
VAR_TH
VAR_TEXT_H
VAR_MAX_GLYPH_W
VAR_MAX_GLYPH_H
VAR_MAX_GLYPH_A
VAR_ASCENT
VAR_MAX_GLYPH_D
VAR_DESCENT
VAR_LINE_H
VAR_LH
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_X
VAR_Y
VAR_N
VAR_T
VAR_VARS_NB
VAR_W
VAR_H
VAR_VAL
VAR_MAXVAL
VAR_MINVAL
VAR_NEGVAL
VAR_CLIPVAL
VAR_VARS_NB
VAR_MAIN_W
VAR_MW
VAR_MAIN_H
VAR_MH
VAR_OVERLAY_W
VAR_OW
VAR_OVERLAY_H
VAR_OH
VAR_VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_X
VAR_Y
VAR_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VARS_NB
VAR_TB
VAR_PTS
VAR_START_PTS
VAR_PREV_PTS
VAR_PREV_SELECTED_PTS
VAR_T
VAR_START_T
VAR_PREV_T
VAR_PREV_SELECTED_T
VAR_PICT_TYPE
VAR_PICT_TYPE_I
VAR_PICT_TYPE_P
VAR_PICT_TYPE_B
VAR_PICT_TYPE_S
VAR_PICT_TYPE_SI
VAR_PICT_TYPE_SP
VAR_PICT_TYPE_BI
VAR_INTERLACE_TYPE
VAR_INTERLACE_TYPE_P
VAR_INTERLACE_TYPE_T
VAR_INTERLACE_TYPE_B
VAR_N
VAR_SELECTED_N
VAR_PREV_SELECTED_N
VAR_KEY
VAR_POS
VAR_VARS_NB
VAR_INTERLACED
VAR_N
VAR_POS
VAR_PREV_INPTS
VAR_PREV_OUTPTS
VAR_PTS
VAR_STARTPTS
VAR_TB
VAR_VARS_NB
VAR_AVTB
VAR_INTB
VAR_VARS_NB
VAR_X
VAR_Y
VAR_W
VAR_H
VAR_TIME
VAR_SPEED
VAR_TEMPO
VAR_ORDER
VAR_PATTERN
VAR_ROW
VAR_VARS_NB

Definition at line 46 of file vf_overlay.c.

Function Documentation

static void blend_slice	(	AVFilterContext *	ctx,
		AVFilterBufferRef *	dst,
		AVFilterBufferRef *	src,
		int	x,
		int	y,
		int	w,
		int	h,
		int	slice_y,
		int	slice_w,
		int	slice_h
	)			`[static]`

< the amount of overlay to blend on to main

Definition at line 340 of file vf_overlay.c.

Referenced by draw_slice().

static int config_input_main ( AVFilterLink * inlink ) [static]

Definition at line 193 of file vf_overlay.c.

static int config_input_overlay ( AVFilterLink * inlink ) [static]

Definition at line 209 of file vf_overlay.c.

static int config_output ( AVFilterLink * outlink ) [static]

Definition at line 272 of file vf_overlay.c.

static void draw_slice	(	AVFilterLink *	inlink,
		int	y,
		int	h,
		int	slice_dir
	)			`[static]`

Definition at line 470 of file vf_overlay.c.

static void end_frame ( AVFilterLink * inlink ) [static]

Definition at line 487 of file vf_overlay.c.

static AVFilterBufferRef* get_video_buffer	(	AVFilterLink *	link,
		int	perms,
		int	w,
		int	h
	)			`[static]`

Definition at line 297 of file vf_overlay.c.

static av_cold int init	(	AVFilterContext *	ctx,
		const char *	args,
		void *	opaque
	)			`[static]`

Definition at line 107 of file vf_overlay.c.

static void null_draw_slice	(	AVFilterLink *	inlink,
		int	y,
		int	h,
		int	slice_dir
	)			`[static]`

Definition at line 493 of file vf_overlay.c.

static void null_end_frame ( AVFilterLink * inlink ) [static]

Definition at line 495 of file vf_overlay.c.

static const char* overlay_get_name ( void * ctx ) [static]

Definition at line 96 of file vf_overlay.c.

static int query_formats ( AVFilterContext * ctx ) [static]

Definition at line 151 of file vf_overlay.c.

static void start_frame	(	AVFilterLink *	inlink,
		AVFilterBufferRef *	inpicref
	)			`[static]`

Definition at line 302 of file vf_overlay.c.

static void start_frame_overlay	(	AVFilterLink *	inlink,
		AVFilterBufferRef *	inpicref
	)			`[static]`

Definition at line 326 of file vf_overlay.c.

static av_cold void uninit ( AVFilterContext * ctx ) [static]

Definition at line 140 of file vf_overlay.c.

Variable Documentation

enum PixelFormat alpha_pix_fmts[] [static]

Initial value:

 {
    PIX_FMT_YUVA420P, PIX_FMT_ARGB, PIX_FMT_ABGR, PIX_FMT_RGBA,
    PIX_FMT_BGRA, PIX_FMT_NONE
}

Definition at line 188 of file vf_overlay.c.

AVFilter avfilter_vf_overlay

Definition at line 497 of file vf_overlay.c.

const AVClass overlay_class [static]

Initial value:

 {
    "OverlayContext",
    overlay_get_name,
    overlay_options
}

Definition at line 101 of file vf_overlay.c.

const AVOption overlay_options[] [static]

Initial value:

 {
    { "x", "set the x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX },
    { "y", "set the y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX },
    {"rgb", "force packed RGB in input and output", OFFSET(allow_packed_rgb), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 },
    {NULL},
}

Definition at line 89 of file vf_overlay.c.

const char* const var_names[] [static]

Initial value:

 {
    "main_w",    "W", 
    "main_h",    "H", 
    "overlay_w", "w", 
    "overlay_h", "h", 
    NULL
}

Definition at line 38 of file vf_overlay.c.


Data Structures
struct	OverlayContext
Defines
#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	OFFSET(x) offsetof(OverlayContext, x)
#define	FAST_DIV255(x) ((((x) + 128) * 257) >> 16)
Enumerations
enum	var_name { VAR_B1, VAR_B2, VAR_S1, VAR_S2, VAR_T1, VAR_T2, VAR_NB, VAR_N, VAR_T, VAR_S, VAR_VARS_NB, VAR_W, VAR_H, VAR_CW, VAR_CH, VAR_HSUB, VAR_VSUB, VARS_NB, VAR_IN_W, VAR_IW, VAR_IN_H, VAR_IH, VAR_OUT_W, VAR_OW, VAR_OUT_H, VAR_OH, VAR_A, VAR_SAR, VAR_DAR, VAR_HSUB, VAR_VSUB, VAR_X, VAR_Y, VAR_N, VAR_POS, VAR_T, VAR_VARS_NB, VAR_MAIN_W, VAR_w, VAR_W, VAR_MAIN_H, VAR_h, VAR_H, VAR_TW, VAR_TEXT_W, VAR_TH, VAR_TEXT_H, VAR_MAX_GLYPH_W, VAR_MAX_GLYPH_H, VAR_MAX_GLYPH_A, VAR_ASCENT, VAR_MAX_GLYPH_D, VAR_DESCENT, VAR_LINE_H, VAR_LH, VAR_SAR, VAR_DAR, VAR_HSUB, VAR_VSUB, VAR_X, VAR_Y, VAR_N, VAR_T, VAR_VARS_NB, VAR_W, VAR_H, VAR_VAL, VAR_MAXVAL, VAR_MINVAL, VAR_NEGVAL, VAR_CLIPVAL, VAR_VARS_NB, VAR_MAIN_W, VAR_MW, VAR_MAIN_H, VAR_MH, VAR_OVERLAY_W, VAR_OW, VAR_OVERLAY_H, VAR_OH, VAR_VARS_NB, VAR_IN_W, VAR_IW, VAR_IN_H, VAR_IH, VAR_OUT_W, VAR_OW, VAR_OUT_H, VAR_OH, VAR_X, VAR_Y, VAR_A, VAR_SAR, VAR_DAR, VAR_HSUB, VAR_VSUB, VARS_NB, VAR_IN_W, VAR_IW, VAR_IN_H, VAR_IH, VAR_OUT_W, VAR_OW, VAR_OUT_H, VAR_OH, VAR_A, VAR_SAR, VAR_DAR, VAR_HSUB, VAR_VSUB, VARS_NB, VAR_TB, VAR_PTS, VAR_START_PTS, VAR_PREV_PTS, VAR_PREV_SELECTED_PTS, VAR_T, VAR_START_T, VAR_PREV_T, VAR_PREV_SELECTED_T, VAR_PICT_TYPE, VAR_PICT_TYPE_I, VAR_PICT_TYPE_P, VAR_PICT_TYPE_B, VAR_PICT_TYPE_S, VAR_PICT_TYPE_SI, VAR_PICT_TYPE_SP, VAR_PICT_TYPE_BI, VAR_INTERLACE_TYPE, VAR_INTERLACE_TYPE_P, VAR_INTERLACE_TYPE_T, VAR_INTERLACE_TYPE_B, VAR_N, VAR_SELECTED_N, VAR_PREV_SELECTED_N, VAR_KEY, VAR_POS, VAR_VARS_NB, VAR_INTERLACED, VAR_N, VAR_POS, VAR_PREV_INPTS, VAR_PREV_OUTPTS, VAR_PTS, VAR_STARTPTS, VAR_TB, VAR_VARS_NB, VAR_AVTB, VAR_INTB, VAR_VARS_NB, VAR_X, VAR_Y, VAR_W, VAR_H, VAR_TIME, VAR_SPEED, VAR_TEMPO, VAR_ORDER, VAR_PATTERN, VAR_ROW, VAR_VARS_NB }
Functions
static const char *	overlay_get_name (void *ctx)
static av_cold int	init (AVFilterContext ctx, const char args, void *opaque)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_input_main (AVFilterLink *inlink)
static int	config_input_overlay (AVFilterLink *inlink)
static int	config_output (AVFilterLink *outlink)
static AVFilterBufferRef *	get_video_buffer (AVFilterLink *link, int perms, int w, int h)
static void	start_frame (AVFilterLink inlink, AVFilterBufferRef inpicref)
static void	start_frame_overlay (AVFilterLink inlink, AVFilterBufferRef inpicref)
static void	blend_slice (AVFilterContext ctx, AVFilterBufferRef dst, AVFilterBufferRef *src, int x, int y, int w, int h, int slice_y, int slice_w, int slice_h)
static void	draw_slice (AVFilterLink *inlink, int y, int h, int slice_dir)
static void	end_frame (AVFilterLink *inlink)
static void	null_draw_slice (AVFilterLink *inlink, int y, int h, int slice_dir)
static void	null_end_frame (AVFilterLink *inlink)
Variables
static const char *const	var_names []
static const AVOption	overlay_options []
static const AVClass	overlay_class
static enum PixelFormat	alpha_pix_fmts []
AVFilter	avfilter_vf_overlay

libavfilter/vf_overlay.c File Reference

Data Structures

Defines

Enumerations

Functions

Variables

Detailed Description

Define Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation