FFmpeg  4.4.6
Data Structures | Macros | Typedefs | Enumerations | Functions | Variables
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_N , VAR_TS , VAR_POS , VAR_PREV_INPTS ,
  VAR_PREV_INDTS , VAR_PREV_OUTPTS , VAR_PREV_OUTDTS , VAR_PTS ,
  VAR_DTS , VAR_STARTPTS , VAR_STARTDTS , VAR_TB ,
  VAR_SR , VAR_VARS_NB , VAR_CH , VAR_N ,
  VAR_NB_IN_CHANNELS , VAR_NB_OUT_CHANNELS , VAR_T , VAR_S ,
  VAR_VARS_NB , VAR_W , VAR_H , VAR_CW ,
  VAR_CH , VAR_HSUB , VAR_VSUB , 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_N , VAR_T ,
  VAR_POS , VAR_PTS , VAR_TS , VAR_TE ,
  VAR_TI , VAR_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_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_FR , 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_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_X ,
  VAR_Y , VAR_W , VAR_H , VAR_N ,
  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_PKT_POS , VAR_PKT_DURATION , VAR_PKT_SIZE , 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_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 , 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_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 , VAR_N ,
  VAR_T , VAR_POS , VAR_S2R_MAIN_W , VAR_S2R_MAIN_H ,
  VAR_S2R_MAIN_A , VAR_S2R_MAIN_SAR , VAR_S2R_MAIN_DAR , VAR_S2R_MDAR ,
  VAR_S2R_MAIN_HSUB , VAR_S2R_MAIN_VSUB , VAR_S2R_MAIN_N , VAR_S2R_MAIN_T ,
  VAR_S2R_MAIN_POS , 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_IN_TIME , VAR_IT , VAR_TIME , VAR_OUT_TIME ,
  VAR_OT , 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 is_newline (uint32_t c)
 
static int load_textfile (AVFilterContext *ctx)
 
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 208 of file vf_drawtext.c.

◆ FLAGS

Definition at line 209 of file vf_drawtext.c.

◆ FT_ERROR_START_LIST

#define FT_ERROR_START_LIST   {

Definition at line 277 of file vf_drawtext.c.

◆ FT_ERRORDEF

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

Definition at line 278 of file vf_drawtext.c.

◆ FT_ERROR_END_LIST

#define FT_ERROR_END_LIST   { 0, NULL } };

Definition at line 279 of file vf_drawtext.c.

◆ FT_ERRMSG

#define FT_ERRMSG (   e)    ft_errors[e].err_msg

Typedef Documentation

◆ eval_func2

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

Definition at line 106 of file vf_drawtext.c.

Enumeration Type Documentation

◆ var_name

enum var_name
Enumerator
VAR_N 
VAR_TS 
VAR_POS 
VAR_PREV_INPTS 
VAR_PREV_INDTS 
VAR_PREV_OUTPTS 
VAR_PREV_OUTDTS 
VAR_PTS 
VAR_DTS 
VAR_STARTPTS 
VAR_STARTDTS 
VAR_TB 
VAR_SR 
VAR_VARS_NB 
VAR_CH 
VAR_N 
VAR_NB_IN_CHANNELS 
VAR_NB_OUT_CHANNELS 
VAR_T 
VAR_S 
VAR_VARS_NB 
VAR_W 
VAR_H 
VAR_CW 
VAR_CH 
VAR_HSUB 
VAR_VSUB 
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_N 
VAR_T 
VAR_POS 
VAR_PTS 
VAR_TS 
VAR_TE 
VAR_TI 
VAR_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_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_FR 
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_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_X 
VAR_Y 
VAR_W 
VAR_H 
VAR_N 
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_PKT_POS 
VAR_PKT_DURATION 
VAR_PKT_SIZE 
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_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 
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_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 
VAR_N 
VAR_T 
VAR_POS 
VAR_S2R_MAIN_W 
VAR_S2R_MAIN_H 
VAR_S2R_MAIN_A 
VAR_S2R_MAIN_SAR 
VAR_S2R_MAIN_DAR 
VAR_S2R_MDAR 
VAR_S2R_MAIN_HSUB 
VAR_S2R_MAIN_VSUB 
VAR_S2R_MAIN_N 
VAR_S2R_MAIN_T 
VAR_S2R_MAIN_POS 
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_IN_TIME 
VAR_IT 
VAR_TIME 
VAR_OUT_TIME 
VAR_OT 
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 113 of file vf_drawtext.c.

◆ expansion_mode

Enumerator
EXP_NONE 
EXP_NORMAL 
EXP_STRFTIME 

Definition at line 137 of file vf_drawtext.c.

Function Documentation

◆ drand()

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

Definition at line 101 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 302 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 316 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 384 of file vf_drawtext.c.

Referenced by update_fontsize().

◆ parse_fontsize()

static av_cold int parse_fontsize ( AVFilterContext ctx)
static

Definition at line 400 of file vf_drawtext.c.

Referenced by update_fontsize().

◆ update_fontsize()

static av_cold int update_fontsize ( AVFilterContext ctx)
static

Definition at line 418 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 454 of file vf_drawtext.c.

Referenced by load_font().

◆ load_font()

static int load_font ( AVFilterContext ctx)
static

Definition at line 554 of file vf_drawtext.c.

Referenced by init().

◆ is_newline()

static int is_newline ( uint32_t  c)
inlinestatic

Definition at line 571 of file vf_drawtext.c.

Referenced by draw_text(), and load_textfile().

◆ load_textfile()

static int load_textfile ( AVFilterContext ctx)
static

Definition at line 576 of file vf_drawtext.c.

Referenced by filter_frame(), and init().

◆ init()

static av_cold int init ( AVFilterContext ctx)
static

Definition at line 693 of file vf_drawtext.c.

Referenced by command().

◆ query_formats()

static int query_formats ( AVFilterContext ctx)
static

Definition at line 789 of file vf_drawtext.c.

◆ glyph_enu_free()

static int glyph_enu_free ( void opaque,
void elem 
)
static

Definition at line 794 of file vf_drawtext.c.

Referenced by uninit().

◆ uninit()

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 804 of file vf_drawtext.c.

Referenced by command().

◆ config_input()

static int config_input ( AVFilterLink inlink)
static

Definition at line 830 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

◆ func_pict_type()

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

Definition at line 920 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 929 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 989 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 998 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 1011 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 1027 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 1047 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 1128 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 1155 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 1195 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 1218 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 1264 of file vf_drawtext.c.

Referenced by draw_text().

◆ update_alpha()

static void update_alpha ( DrawTextContext s)
static

Definition at line 1271 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 1286 of file vf_drawtext.c.

Referenced by filter_frame().

◆ filter_frame()

static int filter_frame ( AVFilterLink inlink,
AVFrame frame 
)
static

Definition at line 1508 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",
"pkt_pos",
"pkt_duration",
"pkt_size",
}
#define NULL
Definition: coverity.c:32

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 97 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:
= {
}
static double drand(void *opaque, double min, double max)
Definition: vf_drawtext.c:101

Definition at line 108 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 211 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
const uint8_t * code
Definition: spdifenc.c:413

◆ 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 },
}
static int func_pict_type(AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
Definition: vf_drawtext.c:920
static int func_metadata(AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
Definition: vf_drawtext.c:998
static int func_frame_num(AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
Definition: vf_drawtext.c:989
static int func_strftime(AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
Definition: vf_drawtext.c:1011
static int func_pts(AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
Definition: vf_drawtext.c:929
static int func_eval_expr_int_format(AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
Definition: vf_drawtext.c:1047
static int func_eval_expr(AVFilterContext *ctx, AVBPrint *bp, char *fct, unsigned argc, char **argv, int tag)
Definition: vf_drawtext.c:1027

Referenced by eval_function().

◆ avfilter_vf_drawtext_inputs

const AVFilterPad avfilter_vf_drawtext_inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = filter_frame,
.config_props = config_input,
.needs_writable = 1,
},
{ NULL }
}
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
static int config_input(AVFilterLink *inlink)
Definition: vf_drawtext.c:830
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_drawtext.c:1508

Definition at line 1549 of file vf_drawtext.c.

◆ avfilter_vf_drawtext_outputs

const AVFilterPad avfilter_vf_drawtext_outputs[]
static
Initial value:
= {
{
.name = "default",
},
{ NULL }
}

Definition at line 1560 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,
}
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: af_acrusher.c:336
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:126
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
static const AVFilterPad avfilter_vf_drawtext_outputs[]
Definition: vf_drawtext.c:1560
static const AVFilterPad avfilter_vf_drawtext_inputs[]
Definition: vf_drawtext.c:1549
static int query_formats(AVFilterContext *ctx)
Definition: vf_drawtext.c:789
static av_cold int init(AVFilterContext *ctx)
Definition: vf_drawtext.c:693
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_drawtext.c:804
static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Definition: vf_drawtext.c:873

Definition at line 1568 of file vf_drawtext.c.