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"

Go to the source code of this file.

Data Structures
struct	OverlayContext

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

Enumerations
enum	var_name {   VAR_CH, VAR_N, VAR_NB_IN_CHANNELS, VAR_NB_OUT_CHANNELS,   VAR_T, VAR_S, VAR_VARS_NB, VAR_VALUE1,   VAR_VALUE2, VAR_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_I, VAR_P, VAR_B, VAR_S,   VAR_SI, VAR_SP, VAR_BI, 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_CONSUMED_SAMPLES_N, VAR_SAMPLES_N,   VAR_SAMPLE_RATE, VAR_N, VAR_SELECTED_N, VAR_PREV_SELECTED_N,   VAR_KEY, VAR_POS, VAR_SCENE, VAR_CONCATDEC_SELECT,   VAR_VARS_NB, VAR_PI, VAR_PHI, VAR_E,   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_OHSUB, VAR_OVSUB, VARS_NB,   VAR_FRAME_RATE, VAR_INTERLACED, VAR_N, VAR_NB_CONSUMED_SAMPLES,   VAR_NB_SAMPLES, VAR_POS, VAR_PREV_INPTS, VAR_PREV_INT,   VAR_PREV_OUTPTS, VAR_PREV_OUTT, VAR_PTS, VAR_SAMPLE_RATE,   VAR_STARTPTS, VAR_STARTT, VAR_T, VAR_TB,   VAR_RTCTIME, VAR_RTCSTART, VAR_S, VAR_SR,   VAR_VARS_NB, VAR_AVTB, VAR_INTB, VAR_SR,   VAR_VARS_NB, VAR_W, VAR_H, VAR_A,   VAR_DAR, VAR_SAR, VAR_HSUB, VAR_VSUB,   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_DAR,   VAR_HSUB, VAR_VSUB, VAR_IN_H, VAR_IH,   VAR_IN_W, VAR_IW, VAR_SAR, VAR_X,   VAR_Y, VAR_H, VAR_W, VAR_T,   VAR_MAX, VARS_NB, VAR_DAR, VAR_HSUB,   VAR_VSUB, VAR_LINE_H, VAR_LH, VAR_MAIN_H,   VAR_h, VAR_H, VAR_MAIN_W, VAR_w,   VAR_W, VAR_MAX_GLYPH_A, VAR_ASCENT, VAR_MAX_GLYPH_D,   VAR_DESCENT, VAR_MAX_GLYPH_H, VAR_MAX_GLYPH_W, VAR_N,   VAR_SAR, VAR_T, VAR_TEXT_H, VAR_TH,   VAR_TEXT_W, VAR_TW, VAR_X, VAR_Y,   VAR_PICT_TYPE, VAR_VARS_NB, VAR_N, VAR_POS,   VAR_R, VAR_T, VAR_NB, VAR_N,   VAR_PTS, VAR_R, VAR_T, VAR_TB,   VAR_NB, VAR_W, VAR_H, VAR_VAL,   VAR_MAXVAL, VAR_MINVAL, VAR_NEGVAL, VAR_CLIPVAL,   VAR_VARS_NB, VAR_W, VAR_H, VAR_X,   VAR_Y, VAR_BITDEPTHX, VAR_BITDEPTHY, VAR_VARS_NB,   VAR_MAIN_W, VAR_MW, VAR_MAIN_H, VAR_MH,   VAR_OVERLAY_W, VAR_OW, VAR_OVERLAY_H, VAR_OH,   VAR_HSUB, VAR_VSUB, VAR_X, VAR_Y,   VAR_N, VAR_POS, VAR_T, 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_W, VAR_H, VAR_VAL, VAR_YMIN,   VAR_UMIN, VAR_VMIN, VAR_AMIN, VAR_YMAX,   VAR_UMAX, VAR_VMAX, VAR_AMAX, VAR_VARS_NB,   VAR_IN_W, VAR_IW, VAR_IN_H, VAR_IH,   VAR_OUT_W, VAR_OW, VAR_OUT_H, VAR_OH,   VAR_HSUB, VAR_VSUB, VAR_N, VAR_T,   VAR_VARS_NB, VAR_PI, VAR_PHI, VAR_E,   VAR_IN_W, VAR_IW, VAR_IN_H, VAR_IH,   VAR_OUT_W, VAR_OW, VAR_OUT_H, VAR_OH,   VAR_A, VAR_DAR, VAR_SAR, VARS_NB,   VAR_W, VAR_H, VAR_N, VAR_PTS,   VAR_R, VAR_T, VAR_TB, VAR_NB,   VAR_IN_W, VAR_IW, VAR_IN_H, VAR_IH,   VAR_OUT_W, VAR_OW, VAR_OUT_H, VAR_OH,   VAR_IN, VAR_ON, VAR_DURATION, VAR_PDURATION,   VAR_TIME, VAR_FRAME, VAR_ZOOM, VAR_PZOOM,   VAR_X, VAR_PX, VAR_Y, VAR_PY,   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, VAR_OHSUB,   VAR_OVSUB, 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 }
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 }
enum	OverlayFormat {   OVERLAY_FORMAT_YUV420, OVERLAY_FORMAT_YUV422, OVERLAY_FORMAT_YUV444, OVERLAY_FORMAT_RGB,   OVERLAY_FORMAT_GBRP, OVERLAY_FORMAT_AUTO, OVERLAY_FORMAT_NB }

Functions
static av_cold void	uninit (AVFilterContext *ctx)
static int	normalize_xy (double d, int chroma_sub)
static void	eval_expr (AVFilterContext *ctx)
static int	set_expr (AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
static int	query_formats (AVFilterContext *ctx)
static int	config_input_overlay (AVFilterLink *inlink)
static int	config_output (AVFilterLink *outlink)
static void	blend_image_packed_rgb (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int main_has_alpha, int x, int y)
	Blend image in src to destination buffer dst at position (x, y). More...
static av_always_inline void	blend_plane (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int src_w, int src_h, int dst_w, int dst_h, int i, int hsub, int vsub, int x, int y, int main_has_alpha, int dst_plane, int dst_offset, int dst_step)
static void	alpha_composite (const AVFrame *src, const AVFrame *dst, int src_w, int src_h, int dst_w, int dst_h, int x, int y)
static av_always_inline void	blend_image_yuv (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int hsub, int vsub, int main_has_alpha, int x, int y)
static av_always_inline void	blend_image_planar_rgb (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int hsub, int vsub, int main_has_alpha, int x, int y)
static void	blend_image_yuv420 (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
static void	blend_image_yuva420 (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
static void	blend_image_yuv422 (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
static void	blend_image_yuva422 (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
static void	blend_image_yuv444 (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
static void	blend_image_yuva444 (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
static void	blend_image_gbrp (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
static void	blend_image_gbrap (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
static void	blend_image_rgb (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
static void	blend_image_rgba (AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
static int	config_input_main (AVFilterLink *inlink)
static int	do_blend (FFFrameSync *fs)
static av_cold int	init (AVFilterContext *ctx)
static int	activate (AVFilterContext *ctx)
	FRAMESYNC_DEFINE_CLASS (overlay, OverlayContext, fs)

Variables
static const char *const	var_names []
static enum AVPixelFormat	alpha_pix_fmts []
static const AVOption	overlay_options []
static const AVFilterPad	avfilter_vf_overlay_inputs []
static const AVFilterPad	avfilter_vf_overlay_outputs []
AVFilter	ff_vf_overlay

Detailed Description

overlay one video on top of another

Definition in file vf_overlay.c.

Macro Definition Documentation

#define MAIN   0

Definition at line 73 of file vf_overlay.c.

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

#define OVERLAY   1

Definition at line 74 of file vf_overlay.c.

Referenced by config_input_overlay(), and query_formats().

#define R   0

Definition at line 76 of file vf_overlay.c.

Referenced by blend_image_packed_rgb().

#define G   1

Definition at line 77 of file vf_overlay.c.

Referenced by blend_image_packed_rgb().

#define B   2

Definition at line 78 of file vf_overlay.c.

Referenced by blend_image_packed_rgb().

#define A   3

Definition at line 79 of file vf_overlay.c.

Referenced by blend_image_packed_rgb().

#define Y   0

Definition at line 81 of file vf_overlay.c.

#define U   1

Definition at line 82 of file vf_overlay.c.

#define V   2

Definition at line 83 of file vf_overlay.c.

#define FAST_DIV255

(

x

)

((((x) + 128) * 257) >> 16)

Definition at line 392 of file vf_overlay.c.

Referenced by alpha_composite(), blend_image_packed_rgb(), and blend_plane().

#define UNPREMULTIPLY_ALPHA	(		x,
			y
	)		((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)))

Definition at line 398 of file vf_overlay.c.

Referenced by alpha_composite(), blend_image_packed_rgb(), and blend_plane().

#define OFFSET

(

x

)

offsetof(OverlayContext, x)

Definition at line 814 of file vf_overlay.c.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 815 of file vf_overlay.c.

Enumeration Type Documentation

enum var_name

Enumerator
VAR_CH
VAR_N
VAR_NB_IN_CHANNELS
VAR_NB_OUT_CHANNELS
VAR_T
VAR_S
VAR_VARS_NB
VAR_VALUE1
VAR_VALUE2
VAR_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_I
VAR_P
VAR_B
VAR_S
VAR_SI
VAR_SP
VAR_BI
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_CONSUMED_SAMPLES_N
VAR_SAMPLES_N
VAR_SAMPLE_RATE
VAR_N
VAR_SELECTED_N
VAR_PREV_SELECTED_N
VAR_KEY
VAR_POS
VAR_SCENE
VAR_CONCATDEC_SELECT
VAR_VARS_NB
VAR_PI
VAR_PHI
VAR_E
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_OHSUB
VAR_OVSUB
VARS_NB
VAR_FRAME_RATE
VAR_INTERLACED
VAR_N
VAR_NB_CONSUMED_SAMPLES
VAR_NB_SAMPLES
VAR_POS
VAR_PREV_INPTS
VAR_PREV_INT
VAR_PREV_OUTPTS
VAR_PREV_OUTT
VAR_PTS
VAR_SAMPLE_RATE
VAR_STARTPTS
VAR_STARTT
VAR_T
VAR_TB
VAR_RTCTIME
VAR_RTCSTART
VAR_S
VAR_SR
VAR_VARS_NB
VAR_AVTB
VAR_INTB
VAR_SR
VAR_VARS_NB
VAR_W
VAR_H
VAR_A
VAR_DAR
VAR_SAR
VAR_HSUB
VAR_VSUB
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_DAR
VAR_HSUB
VAR_VSUB
VAR_IN_H
VAR_IH
VAR_IN_W
VAR_IW
VAR_SAR
VAR_X
VAR_Y
VAR_H
VAR_W
VAR_T
VAR_MAX
VARS_NB
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_LINE_H
VAR_LH
VAR_MAIN_H
VAR_h
VAR_H
VAR_MAIN_W
VAR_w
VAR_W
VAR_MAX_GLYPH_A
VAR_ASCENT
VAR_MAX_GLYPH_D
VAR_DESCENT
VAR_MAX_GLYPH_H
VAR_MAX_GLYPH_W
VAR_N
VAR_SAR
VAR_T
VAR_TEXT_H
VAR_TH
VAR_TEXT_W
VAR_TW
VAR_X
VAR_Y
VAR_PICT_TYPE
VAR_VARS_NB
VAR_N
VAR_POS
VAR_R
VAR_T
VAR_NB
VAR_N
VAR_PTS
VAR_R
VAR_T
VAR_TB
VAR_NB
VAR_W
VAR_H
VAR_VAL
VAR_MAXVAL
VAR_MINVAL
VAR_NEGVAL
VAR_CLIPVAL
VAR_VARS_NB
VAR_W
VAR_H
VAR_X
VAR_Y
VAR_BITDEPTHX
VAR_BITDEPTHY
VAR_VARS_NB
VAR_MAIN_W
VAR_MW
VAR_MAIN_H
VAR_MH
VAR_OVERLAY_W
VAR_OW
VAR_OVERLAY_H
VAR_OH
VAR_HSUB
VAR_VSUB
VAR_X
VAR_Y
VAR_N
VAR_POS
VAR_T
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_W
VAR_H
VAR_VAL
VAR_YMIN
VAR_UMIN
VAR_VMIN
VAR_AMIN
VAR_YMAX
VAR_UMAX
VAR_VMAX
VAR_AMAX
VAR_VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_HSUB
VAR_VSUB
VAR_N
VAR_T
VAR_VARS_NB
VAR_PI
VAR_PHI
VAR_E
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_A
VAR_DAR
VAR_SAR
VARS_NB
VAR_W
VAR_H
VAR_N
VAR_PTS
VAR_R
VAR_T
VAR_TB
VAR_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_IN
VAR_ON
VAR_DURATION
VAR_PDURATION
VAR_TIME
VAR_FRAME
VAR_ZOOM
VAR_PZOOM
VAR_X
VAR_PX
VAR_Y
VAR_PY
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
VAR_OHSUB
VAR_OVSUB
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 58 of file vf_overlay.c.

enum EvalMode

Enumerator
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

Definition at line 85 of file vf_overlay.c.

enum OverlayFormat

Enumerator
OVERLAY_FORMAT_YUV420
OVERLAY_FORMAT_YUV422
OVERLAY_FORMAT_YUV444
OVERLAY_FORMAT_RGB
OVERLAY_FORMAT_GBRP
OVERLAY_FORMAT_AUTO
OVERLAY_FORMAT_NB

Definition at line 91 of file vf_overlay.c.

Function Documentation

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 129 of file vf_overlay.c.

static int normalize_xy ( double  d, int  chroma_sub  )

inlinestatic

Definition at line 138 of file vf_overlay.c.

Referenced by eval_expr().

static void eval_expr ( AVFilterContext *  ctx )

static

Definition at line 145 of file vf_overlay.c.

Referenced by config_input_overlay(), do_blend(), and process_command().

static int set_expr ( AVExpr **  pexpr, const char *  expr, const char *  option, void *  log_ctx  )

static

Definition at line 156 of file vf_overlay.c.

Referenced by config_input_overlay(), and process_command().

static int process_command ( AVFilterContext *  ctx, const char *  cmd, const char *  args, char *  res, int  res_len, int  flags  )

static

Definition at line 177 of file vf_overlay.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 208 of file vf_overlay.c.

static int config_input_overlay ( AVFilterLink *  inlink )

static

Definition at line 327 of file vf_overlay.c.

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 374 of file vf_overlay.c.

static void blend_image_packed_rgb ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  main_has_alpha, int  x, int  y  )

static

Blend image in src to destination buffer dst at position (x, y).

< the amount of overlay to blend on to main

Definition at line 404 of file vf_overlay.c.

Referenced by blend_image_rgb(), and blend_image_rgba().

static av_always_inline void blend_plane ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  src_w, int  src_h, int  dst_w, int  dst_h, int  i, int  hsub, int  vsub, int  x, int  y, int  main_has_alpha, int  dst_plane, int  dst_offset, int  dst_step  )

static

Definition at line 481 of file vf_overlay.c.

Referenced by blend_image_planar_rgb(), and blend_image_yuv().

static void alpha_composite ( const AVFrame *  src, const AVFrame *  dst, int  src_w, int  src_h, int  dst_w, int  dst_h, int  x, int  y  )

inlinestatic

< the amount of overlay to blend on to main

Definition at line 562 of file vf_overlay.c.

Referenced by blend_image_planar_rgb(), and blend_image_yuv().

static av_always_inline void blend_image_yuv ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  hsub, int  vsub, int  main_has_alpha, int  x, int  y  )

static

Definition at line 604 of file vf_overlay.c.

Referenced by blend_image_yuv420(), blend_image_yuv422(), blend_image_yuv444(), blend_image_yuva420(), blend_image_yuva422(), and blend_image_yuva444().

static av_always_inline void blend_image_planar_rgb ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  hsub, int  vsub, int  main_has_alpha, int  x, int  y  )

static

Definition at line 627 of file vf_overlay.c.

Referenced by blend_image_gbrap(), and blend_image_gbrp().

static void blend_image_yuv420 ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  x, int  y  )

static

Definition at line 650 of file vf_overlay.c.

Referenced by config_input_main().

static void blend_image_yuva420 ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  x, int  y  )

static

Definition at line 655 of file vf_overlay.c.

Referenced by config_input_main().

static void blend_image_yuv422 ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  x, int  y  )

static

Definition at line 660 of file vf_overlay.c.

Referenced by config_input_main().

static void blend_image_yuva422 ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  x, int  y  )

static

Definition at line 665 of file vf_overlay.c.

Referenced by config_input_main().

static void blend_image_yuv444 ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  x, int  y  )

static

Definition at line 670 of file vf_overlay.c.

Referenced by config_input_main().

static void blend_image_yuva444 ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  x, int  y  )

static

Definition at line 675 of file vf_overlay.c.

Referenced by config_input_main().

static void blend_image_gbrp ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  x, int  y  )

static

Definition at line 680 of file vf_overlay.c.

Referenced by config_input_main().

static void blend_image_gbrap ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  x, int  y  )

static

Definition at line 685 of file vf_overlay.c.

Referenced by config_input_main().

static void blend_image_rgb ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  x, int  y  )

static

Definition at line 690 of file vf_overlay.c.

Referenced by config_input_main().

static void blend_image_rgba ( AVFilterContext *  ctx, AVFrame *  dst, const AVFrame *  src, int  x, int  y  )

static

Definition at line 695 of file vf_overlay.c.

Referenced by config_input_main().

static int config_input_main ( AVFilterLink *  inlink )

static

Definition at line 700 of file vf_overlay.c.

static int do_blend ( FFFrameSync *  fs )

static

Definition at line 760 of file vf_overlay.c.

Referenced by init().

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 800 of file vf_overlay.c.

static int activate ( AVFilterContext *  ctx )

static

Definition at line 808 of file vf_overlay.c.

FRAMESYNC_DEFINE_CLASS	(	overlay	,
		OverlayContext	,
		fs
	)

Variable Documentation

const char* const var_names[]

static

Initial value:

= {
    "main_w",    "W", 
    "main_h",    "H", 
    "overlay_w", "w", 
    "overlay_h", "h", 
    "hsub",
    "vsub",
    "x",
    "y",
    "n",            
    "pos",          
    "t",            
    NULL
}

Definition at line 43 of file vf_overlay.c.

Referenced by set_expr().

enum AVPixelFormat alpha_pix_fmts[]

static

Initial value:

= {
    AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
    AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_RGBA,
    AV_PIX_FMT_BGRA, AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE
}

Definition at line 202 of file vf_overlay.c.

Referenced by config_input_main(), config_input_overlay(), and query_formats().

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, FLAGS },
    { "y", "set the y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "eof_action", "Action to take when encountering EOF from secondary input ",
        OFFSET(fs.opt_eof_action), AV_OPT_TYPE_INT, { .i64 = EOF_ACTION_REPEAT },
        EOF_ACTION_REPEAT, EOF_ACTION_PASS, .flags = FLAGS, "eof_action" },
        { "repeat", "Repeat the previous frame.",   0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, "eof_action" },
        { "endall", "End both streams.",            0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, "eof_action" },
        { "pass",   "Pass through the main input.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS },   .flags = FLAGS, "eof_action" },
    { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_FRAME}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
         { "init",  "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT},  .flags = FLAGS, .unit = "eval" },
         { "frame", "eval expressions per-frame",                  0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
    { "shortest", "force termination when the shortest input terminates", OFFSET(fs.opt_shortest), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
    { "format", "set output format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=OVERLAY_FORMAT_YUV420}, 0, OVERLAY_FORMAT_NB-1, FLAGS, "format" },
        { "yuv420", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV420}, .flags = FLAGS, .unit = "format" },
        { "yuv422", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV422}, .flags = FLAGS, .unit = "format" },
        { "yuv444", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV444}, .flags = FLAGS, .unit = "format" },
        { "rgb",    "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_RGB},    .flags = FLAGS, .unit = "format" },
        { "gbrp",   "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_GBRP},   .flags = FLAGS, .unit = "format" },
        { "auto",   "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_AUTO},   .flags = FLAGS, .unit = "format" },
    { "repeatlast", "repeat overlay of the last overlay frame", OFFSET(fs.opt_repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
    { NULL }
}

Definition at line 817 of file vf_overlay.c.

const AVFilterPad avfilter_vf_overlay_inputs[]

static

Initial value:

= {
    {
        .name         = "main",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_input_main,
    },
    {
        .name         = "overlay",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_input_overlay,
    },
    { NULL }
}

Definition at line 843 of file vf_overlay.c.

const AVFilterPad avfilter_vf_overlay_outputs[]

static

Initial value:

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

Definition at line 857 of file vf_overlay.c.

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,
}

Definition at line 866 of file vf_overlay.c.