vf_drawtext.c File Reference

drawtext filter, based on the original vhook/drawtext.c filter by Gustavo Sverzut Barbieri More...

#include "config.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <fenv.h>
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/common.h"
#include "libavutil/file.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/random_seed.h"
#include "libavutil/parseutils.h"
#include "libavutil/timecode.h"
#include "libavutil/time_internal.h"
#include "libavutil/tree.h"
#include "libavutil/lfg.h"
#include "avfilter.h"
#include "drawutils.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include <ft2build.h>
#include <FT_FREETYPE_H>
#include <FT_GLYPH_H>
#include <FT_STROKER_H>
#include <FT_ERRORS_H>

Go to the source code of this file.

Data Structures
struct	DrawTextContext
struct	ft_error
struct	drawtext_function

Macros
#define	OFFSET(x)   offsetof(DrawTextContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	FT_ERROR_START_LIST   {
#define	FT_ERRORDEF(e, v, s)   { (e), (s) },
#define	FT_ERROR_END_LIST   { 0, NULL } };
#define	FT_ERRMSG(e)   ft_errors[e].err_msg

Typedefs
typedef double(*	eval_func2) (void *, double a, double b)

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_MAIN_iW, VAR_MW, VAR_MAIN_iH, VAR_MH,   VAR_OVERLAY_iW, VAR_OVERLAY_iH, VAR_OVERLAY_X, VAR_OX,   VAR_OVERLAY_Y, VAR_OY, 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_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_iW,   VAR_IN_W, VAR_iH, VAR_IN_H, VAR_oW,   VAR_OUT_W, VAR_W, VAR_oH, VAR_OUT_H,   VAR_H, CW, CH, CX,   CY, VAR_VARS_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	expansion_mode { EXP_NONE, EXP_NORMAL, EXP_STRFTIME }

Functions
static double	drand (void *opaque, double min, double max)
	AVFILTER_DEFINE_CLASS (drawtext)
static int	glyph_cmp (const void *key, const void *b)
static int	load_glyph (AVFilterContext *ctx, Glyph **glyph_ptr, uint32_t code)
	Load glyphs corresponding to the UTF-32 codepoint code. More...
static av_cold int	set_fontsize (AVFilterContext *ctx, unsigned int fontsize)
static av_cold int	parse_fontsize (AVFilterContext *ctx)
static av_cold int	update_fontsize (AVFilterContext *ctx)
static int	load_font_file (AVFilterContext *ctx, const char *path, int index)
static int	load_font (AVFilterContext *ctx)
static int	load_textfile (AVFilterContext *ctx)
static int	is_newline (uint32_t c)
static av_cold int	init (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	glyph_enu_free (void *opaque, void *elem)
static av_cold void	uninit (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	command (AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
static int	func_pict_type (AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
static int	func_pts (AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
static int	func_frame_num (AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
static int	func_metadata (AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
static int	func_strftime (AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
static int	func_eval_expr (AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
static int	func_eval_expr_int_format (AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
static int	eval_function (AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv)
static int	expand_function (AVFilterContext *ctx, AVBPrint *bp, char **rtext)
static int	expand_text (AVFilterContext *ctx, char *text, AVBPrint *bp)
static int	draw_glyphs (DrawTextContext *s, AVFrame *frame, int width, int height, FFDrawColor *color, int x, int y, int borderw)
static void	update_color_with_alpha (DrawTextContext *s, FFDrawColor *color, const FFDrawColor incolor)
static void	update_alpha (DrawTextContext *s)
static int	draw_text (AVFilterContext *ctx, AVFrame *frame, int width, int height)
static int	filter_frame (AVFilterLink *inlink, AVFrame *frame)

Variables
static const char *const	var_names []
static const char *const	fun2_names []
static const eval_func2	fun2 []
static const AVOption	drawtext_options []
static const struct ft_error	ft_errors []
static const struct drawtext_function	functions []
static const AVFilterPad	avfilter_vf_drawtext_inputs []
static const AVFilterPad	avfilter_vf_drawtext_outputs []
AVFilter	ff_vf_drawtext

Detailed Description

drawtext filter, based on the original vhook/drawtext.c filter by Gustavo Sverzut Barbieri

Definition in file vf_drawtext.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(DrawTextContext, x)

Definition at line 202 of file vf_drawtext.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 203 of file vf_drawtext.c.

FT_ERROR_START_LIST

#define FT_ERROR_START_LIST   {

Definition at line 271 of file vf_drawtext.c.

FT_ERRORDEF

#define FT_ERRORDEF	(		e,
			v,
			s
	)		{ (e), (s) },

Definition at line 272 of file vf_drawtext.c.

FT_ERROR_END_LIST

#define FT_ERROR_END_LIST   { 0, NULL } };

Definition at line 273 of file vf_drawtext.c.

FT_ERRMSG

#define FT_ERRMSG

(

e

)

ft_errors[e].err_msg

Referenced by init(), load_font_file(), and set_fontsize().

Typedef Documentation

eval_func2

typedef double(* eval_func2) (void *, double a, double b)

Definition at line 103 of file vf_drawtext.c.

Enumeration Type Documentation

var_name

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_MAIN_iW
VAR_MW
VAR_MAIN_iH
VAR_MH
VAR_OVERLAY_iW
VAR_OVERLAY_iH
VAR_OVERLAY_X
VAR_OX
VAR_OVERLAY_Y
VAR_OY
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_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_iW
VAR_IN_W
VAR_iH
VAR_IN_H
VAR_oW
VAR_OUT_W
VAR_W
VAR_oH
VAR_OUT_H
VAR_H
CW
CH
CX
CY
VAR_VARS_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 110 of file vf_drawtext.c.

expansion_mode

enum expansion_mode

Enumerator
EXP_NONE
EXP_NORMAL
EXP_STRFTIME

Definition at line 131 of file vf_drawtext.c.

Function Documentation

drand()

static double drand ( void *  opaque, double  min, double  max  )

static

Definition at line 98 of file vf_drawtext.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

drawtext

)

glyph_cmp()

static int glyph_cmp ( const void *  key, const void *  b  )

static

Definition at line 296 of file vf_drawtext.c.

Referenced by draw_glyphs(), draw_text(), and load_glyph().

load_glyph()

static int load_glyph ( AVFilterContext *  ctx, Glyph **  glyph_ptr, uint32_t  code  )

static

Load glyphs corresponding to the UTF-32 codepoint code.

Definition at line 310 of file vf_drawtext.c.

Referenced by draw_text(), and init().

set_fontsize()

static av_cold int set_fontsize ( AVFilterContext *  ctx, unsigned int  fontsize  )

static

Definition at line 378 of file vf_drawtext.c.

Referenced by update_fontsize().

parse_fontsize()

static av_cold int parse_fontsize ( AVFilterContext *  ctx )

static

Definition at line 394 of file vf_drawtext.c.

Referenced by load_font_file(), and update_fontsize().

update_fontsize()

static av_cold int update_fontsize ( AVFilterContext *  ctx )

static

Definition at line 412 of file vf_drawtext.c.

Referenced by draw_text(), and init().

load_font_file()

static int load_font_file ( AVFilterContext *  ctx, const char *  path, int  index  )

static

Definition at line 448 of file vf_drawtext.c.

Referenced by load_font().

load_font()

static int load_font ( AVFilterContext *  ctx )

static

Definition at line 548 of file vf_drawtext.c.

Referenced by init().

load_textfile()

static int load_textfile ( AVFilterContext *  ctx )

static

Definition at line 565 of file vf_drawtext.c.

Referenced by filter_frame(), and init().

is_newline()

static int is_newline ( uint32_t  c )

inlinestatic

Definition at line 592 of file vf_drawtext.c.

Referenced by draw_text().

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 685 of file vf_drawtext.c.

Referenced by command().

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 781 of file vf_drawtext.c.

glyph_enu_free()

static int glyph_enu_free ( void *  opaque, void *  elem  )

static

Definition at line 786 of file vf_drawtext.c.

Referenced by uninit().

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 796 of file vf_drawtext.c.

Referenced by command().

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 822 of file vf_drawtext.c.

Referenced by command().

command()

static int command ( AVFilterContext *  ctx, const char *  cmd, const char *  arg, char *  res, int  res_len, int  flags  )

static

Definition at line 863 of file vf_drawtext.c.

Referenced by cdg_decode_frame(), check_keyboard_interaction(), decode_subframe_lpc(), dvbsub_parse_page_segment(), ftp_abort(), ftp_current_dir(), ftp_delete(), ftp_file_size(), ftp_list_mlsd(), ftp_list_nlst(), ftp_move(), ftp_passive_mode(), ftp_passive_mode_epsv(), ftp_restart(), ftp_retrieve(), ftp_set_dir(), ftp_store(), ftp_type(), idcin_read_packet(), read_connect(), send_invoke_response(), and uninit().

func_pict_type()

static int func_pict_type ( AVFilterContext *  ctx, AVBPrint *  bp, char *  fct, unsigned  argc, char **  argv, int  tag  )

static

Definition at line 881 of file vf_drawtext.c.

func_pts()

static int func_pts ( AVFilterContext *  ctx, AVBPrint *  bp, char *  fct, unsigned  argc, char **  argv, int  tag  )

static

Definition at line 890 of file vf_drawtext.c.

func_frame_num()

static int func_frame_num ( AVFilterContext *  ctx, AVBPrint *  bp, char *  fct, unsigned  argc, char **  argv, int  tag  )

static

Definition at line 942 of file vf_drawtext.c.

func_metadata()

static int func_metadata ( AVFilterContext *  ctx, AVBPrint *  bp, char *  fct, unsigned  argc, char **  argv, int  tag  )

static

Definition at line 951 of file vf_drawtext.c.

func_strftime()

static int func_strftime ( AVFilterContext *  ctx, AVBPrint *  bp, char *  fct, unsigned  argc, char **  argv, int  tag  )

static

Definition at line 964 of file vf_drawtext.c.

func_eval_expr()

static int func_eval_expr ( AVFilterContext *  ctx, AVBPrint *  bp, char *  fct, unsigned  argc, char **  argv, int  tag  )

static

Definition at line 980 of file vf_drawtext.c.

func_eval_expr_int_format()

static int func_eval_expr_int_format ( AVFilterContext *  ctx, AVBPrint *  bp, char *  fct, unsigned  argc, char **  argv, int  tag  )

static

Definition at line 1000 of file vf_drawtext.c.

eval_function()

static int eval_function ( AVFilterContext *  ctx, AVBPrint *  bp, char *  fct, unsigned  argc, char **  argv  )

static

Definition at line 1079 of file vf_drawtext.c.

Referenced by expand_function().

expand_function()

static int expand_function ( AVFilterContext *  ctx, AVBPrint *  bp, char **  rtext  )

static

Definition at line 1106 of file vf_drawtext.c.

Referenced by expand_text().

expand_text()

static int expand_text ( AVFilterContext *  ctx, char *  text, AVBPrint *  bp  )

static

Definition at line 1146 of file vf_drawtext.c.

Referenced by draw_text().

draw_glyphs()

static int draw_glyphs ( DrawTextContext *  s, AVFrame *  frame, int  width, int  height, FFDrawColor *  color, int  x, int  y, int  borderw  )

static

Definition at line 1169 of file vf_drawtext.c.

Referenced by draw_text().

update_color_with_alpha()

static void update_color_with_alpha ( DrawTextContext *  s, FFDrawColor *  color, const FFDrawColor  incolor  )

static

Definition at line 1214 of file vf_drawtext.c.

Referenced by draw_text().

update_alpha()

static void update_alpha ( DrawTextContext *  s )

static

Definition at line 1221 of file vf_drawtext.c.

Referenced by draw_text().

draw_text()

static int draw_text ( AVFilterContext *  ctx, AVFrame *  frame, int  width, int  height  )

static

Definition at line 1236 of file vf_drawtext.c.

Referenced by filter_frame().

filter_frame()

static int filter_frame ( AVFilterLink *  inlink, AVFrame *  frame  )

static

Definition at line 1456 of file vf_drawtext.c.

Variable Documentation

var_names

const char* const var_names[]

static

Initial value:

= {
    "dar",
    "hsub", "vsub",
    "line_h", "lh",           
    "main_h", "h", "H",       
    "main_w", "w", "W",       
    "max_glyph_a", "ascent",  
    "max_glyph_d", "descent", 
    "max_glyph_h",            
    "max_glyph_w",            
    "n",                      
    "sar",
    "t",                      
    "text_h", "th",           
    "text_w", "tw",           
    "x",
    "y",
    "pict_type",
    NULL
}

Definition at line 73 of file vf_drawtext.c.

Referenced by config_input(), func_eval_expr(), func_eval_expr_int_format(), and parse_fontsize().

fun2_names

const char* const fun2_names[]

static

Initial value:

= {
    "rand"
}

Definition at line 94 of file vf_drawtext.c.

Referenced by config_input(), func_eval_expr(), func_eval_expr_int_format(), and parse_fontsize().

fun2

const eval_func2 fun2[]

static

Initial value:

= {
    drand,
    NULL
}

Definition at line 105 of file vf_drawtext.c.

Referenced by config_input(), func_eval_expr(), func_eval_expr_int_format(), and parse_fontsize().

drawtext_options

const AVOption drawtext_options[]

static

Definition at line 205 of file vf_drawtext.c.

ft_errors

const struct ft_error ft_errors[]

static

Initial value:

=


#define FT_ERRMSG(e) 

typedef struct Glyph {
    FT_Glyph glyph;
    FT_Glyph border_glyph;
    uint32_t code;
    unsigned int fontsize;
    FT_Bitmap bitmap; 
    FT_Bitmap border_bitmap; 
    FT_BBox bbox;
    int advance;
    int bitmap_left;
    int bitmap_top;
} Glyph

functions

const struct drawtext_function functions[]

static

Initial value:

= {
    { "expr",      1, 1, 0,   func_eval_expr },
    { "e",         1, 1, 0,   func_eval_expr },
    { "expr_int_format", 2, 3, 0, func_eval_expr_int_format },
    { "eif",       2, 3, 0,   func_eval_expr_int_format },
    { "pict_type", 0, 0, 0,   func_pict_type },
    { "pts",       0, 3, 0,   func_pts      },
    { "gmtime",    0, 1, 'G', func_strftime },
    { "localtime", 0, 1, 'L', func_strftime },
    { "frame_num", 0, 0, 0,   func_frame_num },
    { "n",         0, 0, 0,   func_frame_num },
    { "metadata",  1, 2, 0,   func_metadata },
}

Referenced by eval_function().

avfilter_vf_drawtext_inputs

const AVFilterPad avfilter_vf_drawtext_inputs[]

static

Initial value:

= {
    {
        .name           = "default",
        .type           = AVMEDIA_TYPE_VIDEO,
        .filter_frame   = filter_frame,
        .config_props   = config_input,
        .needs_writable = 1,
    },
    { NULL }
}

Definition at line 1494 of file vf_drawtext.c.

avfilter_vf_drawtext_outputs

const AVFilterPad avfilter_vf_drawtext_outputs[]

static

Initial value:

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

Definition at line 1505 of file vf_drawtext.c.

ff_vf_drawtext

AVFilter ff_vf_drawtext

Initial value:

= {
    .name          = "drawtext",
    .description   = NULL_IF_CONFIG_SMALL("Draw text on top of video frames using libfreetype library."),
    .priv_size     = sizeof(DrawTextContext),
    .priv_class    = &drawtext_class,
    .init          = init,
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = avfilter_vf_drawtext_inputs,
    .outputs       = avfilter_vf_drawtext_outputs,
    .process_command = command,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}

Definition at line 1513 of file vf_drawtext.c.