| 1 | /* |
| 2 | * Copyright (c) 2011 Stefano Sabatini |
| 3 | * Copyright (c) 2010 S.N. Hemanth Meenakshisundaram |
| 4 | * Copyright (c) 2003 Gustavo Sverzut Barbieri <gsbarbieri@yahoo.com.br> |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 8 | * FFmpeg is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * FFmpeg is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with FFmpeg; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | /** |
| 24 | * @file |
| 25 | * drawtext filter, based on the original vhook/drawtext.c |
| 26 | * filter by Gustavo Sverzut Barbieri |
| 27 | */ |
| 28 | |
| 29 | #include "config.h" |
| 30 | |
| 31 | #if HAVE_SYS_TIME_H |
| 32 | #include <sys/time.h> |
| 33 | #endif |
| 34 | #include <sys/types.h> |
| 35 | #include <sys/stat.h> |
| 36 | #include <time.h> |
| 37 | #if HAVE_UNISTD_H |
| 38 | #include <unistd.h> |
| 39 | #endif |
| 40 | #include <fenv.h> |
| 41 | |
| 42 | #if CONFIG_LIBFONTCONFIG |
| 43 | #include <fontconfig/fontconfig.h> |
| 44 | #endif |
| 45 | |
| 46 | #include "libavutil/avstring.h" |
| 47 | #include "libavutil/bprint.h" |
| 48 | #include "libavutil/common.h" |
| 49 | #include "libavutil/file.h" |
| 50 | #include "libavutil/eval.h" |
| 51 | #include "libavutil/opt.h" |
| 52 | #include "libavutil/random_seed.h" |
| 53 | #include "libavutil/parseutils.h" |
| 54 | #include "libavutil/timecode.h" |
| 55 | #include "libavutil/tree.h" |
| 56 | #include "libavutil/lfg.h" |
| 57 | #include "avfilter.h" |
| 58 | #include "drawutils.h" |
| 59 | #include "formats.h" |
| 60 | #include "internal.h" |
| 61 | #include "video.h" |
| 62 | |
| 63 | #if CONFIG_LIBFRIBIDI |
| 64 | #include <fribidi.h> |
| 65 | #endif |
| 66 | |
| 67 | #include <ft2build.h> |
| 68 | #include FT_FREETYPE_H |
| 69 | #include FT_GLYPH_H |
| 70 | #include FT_STROKER_H |
| 71 | |
| 72 | static const char *const var_names[] = { |
| 73 | "dar", |
| 74 | "hsub", "vsub", |
| 75 | "line_h", "lh", ///< line height, same as max_glyph_h |
| 76 | "main_h", "h", "H", ///< height of the input video |
| 77 | "main_w", "w", "W", ///< width of the input video |
| 78 | "max_glyph_a", "ascent", ///< max glyph ascent |
| 79 | "max_glyph_d", "descent", ///< min glyph descent |
| 80 | "max_glyph_h", ///< max glyph height |
| 81 | "max_glyph_w", ///< max glyph width |
| 82 | "n", ///< number of frame |
| 83 | "sar", |
| 84 | "t", ///< timestamp expressed in seconds |
| 85 | "text_h", "th", ///< height of the rendered text |
| 86 | "text_w", "tw", ///< width of the rendered text |
| 87 | "x", |
| 88 | "y", |
| 89 | "pict_type", |
| 90 | NULL |
| 91 | }; |
| 92 | |
| 93 | static const char *const fun2_names[] = { |
| 94 | "rand" |
| 95 | }; |
| 96 | |
| 97 | static double drand(void *opaque, double min, double max) |
| 98 | { |
| 99 | return min + (max-min) / UINT_MAX * av_lfg_get(opaque); |
| 100 | } |
| 101 | |
| 102 | typedef double (*eval_func2)(void *, double a, double b); |
| 103 | |
| 104 | static const eval_func2 fun2[] = { |
| 105 | drand, |
| 106 | NULL |
| 107 | }; |
| 108 | |
| 109 | enum var_name { |
| 110 | VAR_DAR, |
| 111 | VAR_HSUB, VAR_VSUB, |
| 112 | VAR_LINE_H, VAR_LH, |
| 113 | VAR_MAIN_H, VAR_h, VAR_H, |
| 114 | VAR_MAIN_W, VAR_w, VAR_W, |
| 115 | VAR_MAX_GLYPH_A, VAR_ASCENT, |
| 116 | VAR_MAX_GLYPH_D, VAR_DESCENT, |
| 117 | VAR_MAX_GLYPH_H, |
| 118 | VAR_MAX_GLYPH_W, |
| 119 | VAR_N, |
| 120 | VAR_SAR, |
| 121 | VAR_T, |
| 122 | VAR_TEXT_H, VAR_TH, |
| 123 | VAR_TEXT_W, VAR_TW, |
| 124 | VAR_X, |
| 125 | VAR_Y, |
| 126 | VAR_PICT_TYPE, |
| 127 | VAR_VARS_NB |
| 128 | }; |
| 129 | |
| 130 | enum expansion_mode { |
| 131 | EXP_NONE, |
| 132 | EXP_NORMAL, |
| 133 | EXP_STRFTIME, |
| 134 | }; |
| 135 | |
| 136 | typedef struct DrawTextContext { |
| 137 | const AVClass *class; |
| 138 | enum expansion_mode exp_mode; ///< expansion mode to use for the text |
| 139 | int reinit; ///< tells if the filter is being reinited |
| 140 | #if CONFIG_LIBFONTCONFIG |
| 141 | uint8_t *font; ///< font to be used |
| 142 | #endif |
| 143 | uint8_t *fontfile; ///< font to be used |
| 144 | uint8_t *text; ///< text to be drawn |
| 145 | AVBPrint expanded_text; ///< used to contain the expanded text |
| 146 | uint8_t *fontcolor_expr; ///< fontcolor expression to evaluate |
| 147 | AVBPrint expanded_fontcolor; ///< used to contain the expanded fontcolor spec |
| 148 | int ft_load_flags; ///< flags used for loading fonts, see FT_LOAD_* |
| 149 | FT_Vector *positions; ///< positions for each element in the text |
| 150 | size_t nb_positions; ///< number of elements of positions array |
| 151 | char *textfile; ///< file with text to be drawn |
| 152 | int x; ///< x position to start drawing text |
| 153 | int y; ///< y position to start drawing text |
| 154 | int max_glyph_w; ///< max glyph width |
| 155 | int max_glyph_h; ///< max glyph height |
| 156 | int shadowx, shadowy; |
| 157 | int borderw; ///< border width |
| 158 | unsigned int fontsize; ///< font size to use |
| 159 | |
| 160 | short int draw_box; ///< draw box around text - true or false |
| 161 | int use_kerning; ///< font kerning is used - true/false |
| 162 | int tabsize; ///< tab size |
| 163 | int fix_bounds; ///< do we let it go out of frame bounds - t/f |
| 164 | |
| 165 | FFDrawContext dc; |
| 166 | FFDrawColor fontcolor; ///< foreground color |
| 167 | FFDrawColor shadowcolor; ///< shadow color |
| 168 | FFDrawColor bordercolor; ///< border color |
| 169 | FFDrawColor boxcolor; ///< background color |
| 170 | |
| 171 | FT_Library library; ///< freetype font library handle |
| 172 | FT_Face face; ///< freetype font face handle |
| 173 | FT_Stroker stroker; ///< freetype stroker handle |
| 174 | struct AVTreeNode *glyphs; ///< rendered glyphs, stored using the UTF-32 char code |
| 175 | char *x_expr; ///< expression for x position |
| 176 | char *y_expr; ///< expression for y position |
| 177 | AVExpr *x_pexpr, *y_pexpr; ///< parsed expressions for x and y |
| 178 | int64_t basetime; ///< base pts time in the real world for display |
| 179 | double var_values[VAR_VARS_NB]; |
| 180 | #if FF_API_DRAWTEXT_OLD_TIMELINE |
| 181 | char *draw_expr; ///< expression for draw |
| 182 | AVExpr *draw_pexpr; ///< parsed expression for draw |
| 183 | int draw; ///< set to zero to prevent drawing |
| 184 | #endif |
| 185 | AVLFG prng; ///< random |
| 186 | char *tc_opt_string; ///< specified timecode option string |
| 187 | AVRational tc_rate; ///< frame rate for timecode |
| 188 | AVTimecode tc; ///< timecode context |
| 189 | int tc24hmax; ///< 1 if timecode is wrapped to 24 hours, 0 otherwise |
| 190 | int reload; ///< reload text file for each frame |
| 191 | int start_number; ///< starting frame number for n/frame_num var |
| 192 | #if CONFIG_LIBFRIBIDI |
| 193 | int text_shaping; ///< 1 to shape the text before drawing it |
| 194 | #endif |
| 195 | AVDictionary *metadata; |
| 196 | } DrawTextContext; |
| 197 | |
| 198 | #define OFFSET(x) offsetof(DrawTextContext, x) |
| 199 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| 200 | |
| 201 | static const AVOption drawtext_options[]= { |
| 202 | {"fontfile", "set font file", OFFSET(fontfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, |
| 203 | {"text", "set text", OFFSET(text), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, |
| 204 | {"textfile", "set text file", OFFSET(textfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, |
| 205 | {"fontcolor", "set foreground color", OFFSET(fontcolor.rgba), AV_OPT_TYPE_COLOR, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS}, |
| 206 | {"fontcolor_expr", "set foreground color expression", OFFSET(fontcolor_expr), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS}, |
| 207 | {"boxcolor", "set box color", OFFSET(boxcolor.rgba), AV_OPT_TYPE_COLOR, {.str="white"}, CHAR_MIN, CHAR_MAX, FLAGS}, |
| 208 | {"bordercolor", "set border color", OFFSET(bordercolor.rgba), AV_OPT_TYPE_COLOR, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS}, |
| 209 | {"shadowcolor", "set shadow color", OFFSET(shadowcolor.rgba), AV_OPT_TYPE_COLOR, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS}, |
| 210 | {"box", "set box", OFFSET(draw_box), AV_OPT_TYPE_INT, {.i64=0}, 0, 1 , FLAGS}, |
| 211 | {"fontsize", "set font size", OFFSET(fontsize), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX , FLAGS}, |
| 212 | {"x", "set x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX, FLAGS}, |
| 213 | {"y", "set y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX, FLAGS}, |
| 214 | {"shadowx", "set x", OFFSET(shadowx), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX , FLAGS}, |
| 215 | {"shadowy", "set y", OFFSET(shadowy), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX , FLAGS}, |
| 216 | {"borderw", "set border width", OFFSET(borderw), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX , FLAGS}, |
| 217 | {"tabsize", "set tab size", OFFSET(tabsize), AV_OPT_TYPE_INT, {.i64=4}, 0, INT_MAX , FLAGS}, |
| 218 | {"basetime", "set base time", OFFSET(basetime), AV_OPT_TYPE_INT64, {.i64=AV_NOPTS_VALUE}, INT64_MIN, INT64_MAX , FLAGS}, |
| 219 | #if FF_API_DRAWTEXT_OLD_TIMELINE |
| 220 | {"draw", "if false do not draw (deprecated)", OFFSET(draw_expr), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, |
| 221 | #endif |
| 222 | #if CONFIG_LIBFONTCONFIG |
| 223 | { "font", "Font name", OFFSET(font), AV_OPT_TYPE_STRING, { .str = "Sans" }, .flags = FLAGS }, |
| 224 | #endif |
| 225 | |
| 226 | {"expansion", "set the expansion mode", OFFSET(exp_mode), AV_OPT_TYPE_INT, {.i64=EXP_NORMAL}, 0, 2, FLAGS, "expansion"}, |
| 227 | {"none", "set no expansion", OFFSET(exp_mode), AV_OPT_TYPE_CONST, {.i64=EXP_NONE}, 0, 0, FLAGS, "expansion"}, |
| 228 | {"normal", "set normal expansion", OFFSET(exp_mode), AV_OPT_TYPE_CONST, {.i64=EXP_NORMAL}, 0, 0, FLAGS, "expansion"}, |
| 229 | {"strftime", "set strftime expansion (deprecated)", OFFSET(exp_mode), AV_OPT_TYPE_CONST, {.i64=EXP_STRFTIME}, 0, 0, FLAGS, "expansion"}, |
| 230 | |
| 231 | {"timecode", "set initial timecode", OFFSET(tc_opt_string), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, |
| 232 | {"tc24hmax", "set 24 hours max (timecode only)", OFFSET(tc24hmax), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS}, |
| 233 | {"timecode_rate", "set rate (timecode only)", OFFSET(tc_rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS}, |
| 234 | {"r", "set rate (timecode only)", OFFSET(tc_rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS}, |
| 235 | {"rate", "set rate (timecode only)", OFFSET(tc_rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS}, |
| 236 | {"reload", "reload text file for each frame", OFFSET(reload), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS}, |
| 237 | {"fix_bounds", "if true, check and fix text coords to avoid clipping", OFFSET(fix_bounds), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS}, |
| 238 | {"start_number", "start frame number for n/frame_num variable", OFFSET(start_number), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS}, |
| 239 | |
| 240 | #if CONFIG_LIBFRIBIDI |
| 241 | {"text_shaping", "attempt to shape text before drawing", OFFSET(text_shaping), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS}, |
| 242 | #endif |
| 243 | |
| 244 | /* FT_LOAD_* flags */ |
| 245 | { "ft_load_flags", "set font loading flags for libfreetype", OFFSET(ft_load_flags), AV_OPT_TYPE_FLAGS, { .i64 = FT_LOAD_DEFAULT }, 0, INT_MAX, FLAGS, "ft_load_flags" }, |
| 246 | { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_DEFAULT }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 247 | { "no_scale", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_SCALE }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 248 | { "no_hinting", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_HINTING }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 249 | { "render", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_RENDER }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 250 | { "no_bitmap", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_BITMAP }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 251 | { "vertical_layout", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_VERTICAL_LAYOUT }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 252 | { "force_autohint", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_FORCE_AUTOHINT }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 253 | { "crop_bitmap", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_CROP_BITMAP }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 254 | { "pedantic", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_PEDANTIC }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 255 | { "ignore_global_advance_width", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 256 | { "no_recurse", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_RECURSE }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 257 | { "ignore_transform", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_IGNORE_TRANSFORM }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 258 | { "monochrome", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_MONOCHROME }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 259 | { "linear_design", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_LINEAR_DESIGN }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 260 | { "no_autohint", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_AUTOHINT }, .flags = FLAGS, .unit = "ft_load_flags" }, |
| 261 | { NULL } |
| 262 | }; |
| 263 | |
| 264 | AVFILTER_DEFINE_CLASS(drawtext); |
| 265 | |
| 266 | #undef __FTERRORS_H__ |
| 267 | #define FT_ERROR_START_LIST { |
| 268 | #define FT_ERRORDEF(e, v, s) { (e), (s) }, |
| 269 | #define FT_ERROR_END_LIST { 0, NULL } }; |
| 270 | |
| 271 | static const struct ft_error |
| 272 | { |
| 273 | int err; |
| 274 | const char *err_msg; |
| 275 | } ft_errors[] = |
| 276 | #include FT_ERRORS_H |
| 277 | |
| 278 | #define FT_ERRMSG(e) ft_errors[e].err_msg |
| 279 | |
| 280 | typedef struct Glyph { |
| 281 | FT_Glyph glyph; |
| 282 | FT_Glyph border_glyph; |
| 283 | uint32_t code; |
| 284 | FT_Bitmap bitmap; ///< array holding bitmaps of font |
| 285 | FT_Bitmap border_bitmap; ///< array holding bitmaps of font border |
| 286 | FT_BBox bbox; |
| 287 | int advance; |
| 288 | int bitmap_left; |
| 289 | int bitmap_top; |
| 290 | } Glyph; |
| 291 | |
| 292 | static int glyph_cmp(void *key, const void *b) |
| 293 | { |
| 294 | const Glyph *a = key, *bb = b; |
| 295 | int64_t diff = (int64_t)a->code - (int64_t)bb->code; |
| 296 | return diff > 0 ? 1 : diff < 0 ? -1 : 0; |
| 297 | } |
| 298 | |
| 299 | /** |
| 300 | * Load glyphs corresponding to the UTF-32 codepoint code. |
| 301 | */ |
| 302 | static int load_glyph(AVFilterContext *ctx, Glyph **glyph_ptr, uint32_t code) |
| 303 | { |
| 304 | DrawTextContext *s = ctx->priv; |
| 305 | FT_BitmapGlyph bitmapglyph; |
| 306 | Glyph *glyph; |
| 307 | struct AVTreeNode *node = NULL; |
| 308 | int ret; |
| 309 | |
| 310 | /* load glyph into s->face->glyph */ |
| 311 | if (FT_Load_Char(s->face, code, s->ft_load_flags)) |
| 312 | return AVERROR(EINVAL); |
| 313 | |
| 314 | glyph = av_mallocz(sizeof(*glyph)); |
| 315 | if (!glyph) { |
| 316 | ret = AVERROR(ENOMEM); |
| 317 | goto error; |
| 318 | } |
| 319 | glyph->code = code; |
| 320 | |
| 321 | if (FT_Get_Glyph(s->face->glyph, &glyph->glyph)) { |
| 322 | ret = AVERROR(EINVAL); |
| 323 | goto error; |
| 324 | } |
| 325 | if (s->borderw) { |
| 326 | glyph->border_glyph = glyph->glyph; |
| 327 | if (FT_Glyph_StrokeBorder(&glyph->border_glyph, s->stroker, 0, 0) || |
| 328 | FT_Glyph_To_Bitmap(&glyph->border_glyph, FT_RENDER_MODE_NORMAL, 0, 1)) { |
| 329 | ret = AVERROR_EXTERNAL; |
| 330 | goto error; |
| 331 | } |
| 332 | bitmapglyph = (FT_BitmapGlyph) glyph->border_glyph; |
| 333 | glyph->border_bitmap = bitmapglyph->bitmap; |
| 334 | } |
| 335 | if (FT_Glyph_To_Bitmap(&glyph->glyph, FT_RENDER_MODE_NORMAL, 0, 1)) { |
| 336 | ret = AVERROR_EXTERNAL; |
| 337 | goto error; |
| 338 | } |
| 339 | bitmapglyph = (FT_BitmapGlyph) glyph->glyph; |
| 340 | |
| 341 | glyph->bitmap = bitmapglyph->bitmap; |
| 342 | glyph->bitmap_left = bitmapglyph->left; |
| 343 | glyph->bitmap_top = bitmapglyph->top; |
| 344 | glyph->advance = s->face->glyph->advance.x >> 6; |
| 345 | |
| 346 | /* measure text height to calculate text_height (or the maximum text height) */ |
| 347 | FT_Glyph_Get_CBox(glyph->glyph, ft_glyph_bbox_pixels, &glyph->bbox); |
| 348 | |
| 349 | /* cache the newly created glyph */ |
| 350 | if (!(node = av_tree_node_alloc())) { |
| 351 | ret = AVERROR(ENOMEM); |
| 352 | goto error; |
| 353 | } |
| 354 | av_tree_insert(&s->glyphs, glyph, glyph_cmp, &node); |
| 355 | |
| 356 | if (glyph_ptr) |
| 357 | *glyph_ptr = glyph; |
| 358 | return 0; |
| 359 | |
| 360 | error: |
| 361 | if (glyph) |
| 362 | av_freep(&glyph->glyph); |
| 363 | |
| 364 | av_freep(&glyph); |
| 365 | av_freep(&node); |
| 366 | return ret; |
| 367 | } |
| 368 | |
| 369 | static int load_font_file(AVFilterContext *ctx, const char *path, int index) |
| 370 | { |
| 371 | DrawTextContext *s = ctx->priv; |
| 372 | int err; |
| 373 | |
| 374 | err = FT_New_Face(s->library, path, index, &s->face); |
| 375 | if (err) { |
| 376 | av_log(ctx, AV_LOG_ERROR, "Could not load font \"%s\": %s\n", |
| 377 | s->fontfile, FT_ERRMSG(err)); |
| 378 | return AVERROR(EINVAL); |
| 379 | } |
| 380 | return 0; |
| 381 | } |
| 382 | |
| 383 | #if CONFIG_LIBFONTCONFIG |
| 384 | static int load_font_fontconfig(AVFilterContext *ctx) |
| 385 | { |
| 386 | DrawTextContext *s = ctx->priv; |
| 387 | FcConfig *fontconfig; |
| 388 | FcPattern *pat, *best; |
| 389 | FcResult result = FcResultMatch; |
| 390 | FcChar8 *filename; |
| 391 | int index; |
| 392 | double size; |
| 393 | int err = AVERROR(ENOENT); |
| 394 | |
| 395 | fontconfig = FcInitLoadConfigAndFonts(); |
| 396 | if (!fontconfig) { |
| 397 | av_log(ctx, AV_LOG_ERROR, "impossible to init fontconfig\n"); |
| 398 | return AVERROR_UNKNOWN; |
| 399 | } |
| 400 | pat = FcNameParse(s->fontfile ? s->fontfile : |
| 401 | (uint8_t *)(intptr_t)"default"); |
| 402 | if (!pat) { |
| 403 | av_log(ctx, AV_LOG_ERROR, "could not parse fontconfig pat"); |
| 404 | return AVERROR(EINVAL); |
| 405 | } |
| 406 | |
| 407 | FcPatternAddString(pat, FC_FAMILY, s->font); |
| 408 | if (s->fontsize) |
| 409 | FcPatternAddDouble(pat, FC_SIZE, (double)s->fontsize); |
| 410 | |
| 411 | FcDefaultSubstitute(pat); |
| 412 | |
| 413 | if (!FcConfigSubstitute(fontconfig, pat, FcMatchPattern)) { |
| 414 | av_log(ctx, AV_LOG_ERROR, "could not substitue fontconfig options"); /* very unlikely */ |
| 415 | FcPatternDestroy(pat); |
| 416 | return AVERROR(ENOMEM); |
| 417 | } |
| 418 | |
| 419 | best = FcFontMatch(fontconfig, pat, &result); |
| 420 | FcPatternDestroy(pat); |
| 421 | |
| 422 | if (!best || result != FcResultMatch) { |
| 423 | av_log(ctx, AV_LOG_ERROR, |
| 424 | "Cannot find a valid font for the family %s\n", |
| 425 | s->font); |
| 426 | goto fail; |
| 427 | } |
| 428 | |
| 429 | if ( |
| 430 | FcPatternGetInteger(best, FC_INDEX, 0, &index ) != FcResultMatch || |
| 431 | FcPatternGetDouble (best, FC_SIZE, 0, &size ) != FcResultMatch) { |
| 432 | av_log(ctx, AV_LOG_ERROR, "impossible to find font information"); |
| 433 | return AVERROR(EINVAL); |
| 434 | } |
| 435 | |
| 436 | if (FcPatternGetString(best, FC_FILE, 0, &filename) != FcResultMatch) { |
| 437 | av_log(ctx, AV_LOG_ERROR, "No file path for %s\n", |
| 438 | s->font); |
| 439 | goto fail; |
| 440 | } |
| 441 | |
| 442 | av_log(ctx, AV_LOG_INFO, "Using \"%s\"\n", filename); |
| 443 | if (!s->fontsize) |
| 444 | s->fontsize = size + 0.5; |
| 445 | |
| 446 | err = load_font_file(ctx, filename, index); |
| 447 | if (err) |
| 448 | return err; |
| 449 | FcConfigDestroy(fontconfig); |
| 450 | fail: |
| 451 | FcPatternDestroy(best); |
| 452 | return err; |
| 453 | } |
| 454 | #endif |
| 455 | |
| 456 | static int load_font(AVFilterContext *ctx) |
| 457 | { |
| 458 | DrawTextContext *s = ctx->priv; |
| 459 | int err; |
| 460 | |
| 461 | /* load the face, and set up the encoding, which is by default UTF-8 */ |
| 462 | err = load_font_file(ctx, s->fontfile, 0); |
| 463 | if (!err) |
| 464 | return 0; |
| 465 | #if CONFIG_LIBFONTCONFIG |
| 466 | err = load_font_fontconfig(ctx); |
| 467 | if (!err) |
| 468 | return 0; |
| 469 | #endif |
| 470 | return err; |
| 471 | } |
| 472 | |
| 473 | static int load_textfile(AVFilterContext *ctx) |
| 474 | { |
| 475 | DrawTextContext *s = ctx->priv; |
| 476 | int err; |
| 477 | uint8_t *textbuf; |
| 478 | uint8_t *tmp; |
| 479 | size_t textbuf_size; |
| 480 | |
| 481 | if ((err = av_file_map(s->textfile, &textbuf, &textbuf_size, 0, ctx)) < 0) { |
| 482 | av_log(ctx, AV_LOG_ERROR, |
| 483 | "The text file '%s' could not be read or is empty\n", |
| 484 | s->textfile); |
| 485 | return err; |
| 486 | } |
| 487 | |
| 488 | if (!(tmp = av_realloc(s->text, textbuf_size + 1))) { |
| 489 | av_file_unmap(textbuf, textbuf_size); |
| 490 | return AVERROR(ENOMEM); |
| 491 | } |
| 492 | s->text = tmp; |
| 493 | memcpy(s->text, textbuf, textbuf_size); |
| 494 | s->text[textbuf_size] = 0; |
| 495 | av_file_unmap(textbuf, textbuf_size); |
| 496 | |
| 497 | return 0; |
| 498 | } |
| 499 | |
| 500 | static inline int is_newline(uint32_t c) |
| 501 | { |
| 502 | return c == '\n' || c == '\r' || c == '\f' || c == '\v'; |
| 503 | } |
| 504 | |
| 505 | #if CONFIG_LIBFRIBIDI |
| 506 | static int shape_text(AVFilterContext *ctx) |
| 507 | { |
| 508 | DrawTextContext *s = ctx->priv; |
| 509 | uint8_t *tmp; |
| 510 | int ret = AVERROR(ENOMEM); |
| 511 | static const FriBidiFlags flags = FRIBIDI_FLAGS_DEFAULT | |
| 512 | FRIBIDI_FLAGS_ARABIC; |
| 513 | FriBidiChar *unicodestr = NULL; |
| 514 | FriBidiStrIndex len; |
| 515 | FriBidiParType direction = FRIBIDI_PAR_LTR; |
| 516 | FriBidiStrIndex line_start = 0; |
| 517 | FriBidiStrIndex line_end = 0; |
| 518 | FriBidiLevel *embedding_levels = NULL; |
| 519 | FriBidiArabicProp *ar_props = NULL; |
| 520 | FriBidiCharType *bidi_types = NULL; |
| 521 | FriBidiStrIndex i,j; |
| 522 | |
| 523 | len = strlen(s->text); |
| 524 | if (!(unicodestr = av_malloc_array(len, sizeof(*unicodestr)))) { |
| 525 | goto out; |
| 526 | } |
| 527 | len = fribidi_charset_to_unicode(FRIBIDI_CHAR_SET_UTF8, |
| 528 | s->text, len, unicodestr); |
| 529 | |
| 530 | bidi_types = av_malloc_array(len, sizeof(*bidi_types)); |
| 531 | if (!bidi_types) { |
| 532 | goto out; |
| 533 | } |
| 534 | |
| 535 | fribidi_get_bidi_types(unicodestr, len, bidi_types); |
| 536 | |
| 537 | embedding_levels = av_malloc_array(len, sizeof(*embedding_levels)); |
| 538 | if (!embedding_levels) { |
| 539 | goto out; |
| 540 | } |
| 541 | |
| 542 | if (!fribidi_get_par_embedding_levels(bidi_types, len, &direction, |
| 543 | embedding_levels)) { |
| 544 | goto out; |
| 545 | } |
| 546 | |
| 547 | ar_props = av_malloc_array(len, sizeof(*ar_props)); |
| 548 | if (!ar_props) { |
| 549 | goto out; |
| 550 | } |
| 551 | |
| 552 | fribidi_get_joining_types(unicodestr, len, ar_props); |
| 553 | fribidi_join_arabic(bidi_types, len, embedding_levels, ar_props); |
| 554 | fribidi_shape(flags, embedding_levels, len, ar_props, unicodestr); |
| 555 | |
| 556 | for (line_end = 0, line_start = 0; line_end < len; line_end++) { |
| 557 | if (is_newline(unicodestr[line_end]) || line_end == len - 1) { |
| 558 | if (!fribidi_reorder_line(flags, bidi_types, |
| 559 | line_end - line_start + 1, line_start, |
| 560 | direction, embedding_levels, unicodestr, |
| 561 | NULL)) { |
| 562 | goto out; |
| 563 | } |
| 564 | line_start = line_end + 1; |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | /* Remove zero-width fill chars put in by libfribidi */ |
| 569 | for (i = 0, j = 0; i < len; i++) |
| 570 | if (unicodestr[i] != FRIBIDI_CHAR_FILL) |
| 571 | unicodestr[j++] = unicodestr[i]; |
| 572 | len = j; |
| 573 | |
| 574 | if (!(tmp = av_realloc(s->text, (len * 4 + 1) * sizeof(*s->text)))) { |
| 575 | /* Use len * 4, as a unicode character can be up to 4 bytes in UTF-8 */ |
| 576 | goto out; |
| 577 | } |
| 578 | |
| 579 | s->text = tmp; |
| 580 | len = fribidi_unicode_to_charset(FRIBIDI_CHAR_SET_UTF8, |
| 581 | unicodestr, len, s->text); |
| 582 | ret = 0; |
| 583 | |
| 584 | out: |
| 585 | av_free(unicodestr); |
| 586 | av_free(embedding_levels); |
| 587 | av_free(ar_props); |
| 588 | av_free(bidi_types); |
| 589 | return ret; |
| 590 | } |
| 591 | #endif |
| 592 | |
| 593 | static av_cold int init(AVFilterContext *ctx) |
| 594 | { |
| 595 | int err; |
| 596 | DrawTextContext *s = ctx->priv; |
| 597 | Glyph *glyph; |
| 598 | |
| 599 | #if FF_API_DRAWTEXT_OLD_TIMELINE |
| 600 | if (s->draw_expr) |
| 601 | av_log(ctx, AV_LOG_WARNING, "'draw' option is deprecated and will be removed soon, " |
| 602 | "you are encouraged to use the generic timeline support through the 'enable' option\n"); |
| 603 | #endif |
| 604 | |
| 605 | if (!s->fontfile && !CONFIG_LIBFONTCONFIG) { |
| 606 | av_log(ctx, AV_LOG_ERROR, "No font filename provided\n"); |
| 607 | return AVERROR(EINVAL); |
| 608 | } |
| 609 | |
| 610 | if (s->textfile) { |
| 611 | if (s->text) { |
| 612 | av_log(ctx, AV_LOG_ERROR, |
| 613 | "Both text and text file provided. Please provide only one\n"); |
| 614 | return AVERROR(EINVAL); |
| 615 | } |
| 616 | if ((err = load_textfile(ctx)) < 0) |
| 617 | return err; |
| 618 | } |
| 619 | |
| 620 | #if CONFIG_LIBFRIBIDI |
| 621 | if (s->text_shaping) |
| 622 | if ((err = shape_text(ctx)) < 0) |
| 623 | return err; |
| 624 | #endif |
| 625 | |
| 626 | if (s->reload && !s->textfile) |
| 627 | av_log(ctx, AV_LOG_WARNING, "No file to reload\n"); |
| 628 | |
| 629 | if (s->tc_opt_string) { |
| 630 | int ret = av_timecode_init_from_string(&s->tc, s->tc_rate, |
| 631 | s->tc_opt_string, ctx); |
| 632 | if (ret < 0) |
| 633 | return ret; |
| 634 | if (s->tc24hmax) |
| 635 | s->tc.flags |= AV_TIMECODE_FLAG_24HOURSMAX; |
| 636 | if (!s->text) |
| 637 | s->text = av_strdup(""); |
| 638 | } |
| 639 | |
| 640 | if (!s->text) { |
| 641 | av_log(ctx, AV_LOG_ERROR, |
| 642 | "Either text, a valid file or a timecode must be provided\n"); |
| 643 | return AVERROR(EINVAL); |
| 644 | } |
| 645 | |
| 646 | if ((err = FT_Init_FreeType(&(s->library)))) { |
| 647 | av_log(ctx, AV_LOG_ERROR, |
| 648 | "Could not load FreeType: %s\n", FT_ERRMSG(err)); |
| 649 | return AVERROR(EINVAL); |
| 650 | } |
| 651 | |
| 652 | err = load_font(ctx); |
| 653 | if (err) |
| 654 | return err; |
| 655 | if (!s->fontsize) |
| 656 | s->fontsize = 16; |
| 657 | if ((err = FT_Set_Pixel_Sizes(s->face, 0, s->fontsize))) { |
| 658 | av_log(ctx, AV_LOG_ERROR, "Could not set font size to %d pixels: %s\n", |
| 659 | s->fontsize, FT_ERRMSG(err)); |
| 660 | return AVERROR(EINVAL); |
| 661 | } |
| 662 | |
| 663 | if (s->borderw) { |
| 664 | if (FT_Stroker_New(s->library, &s->stroker)) { |
| 665 | av_log(ctx, AV_LOG_ERROR, "Coult not init FT stroker\n"); |
| 666 | return AVERROR_EXTERNAL; |
| 667 | } |
| 668 | FT_Stroker_Set(s->stroker, s->borderw << 6, FT_STROKER_LINECAP_ROUND, |
| 669 | FT_STROKER_LINEJOIN_ROUND, 0); |
| 670 | } |
| 671 | |
| 672 | s->use_kerning = FT_HAS_KERNING(s->face); |
| 673 | |
| 674 | /* load the fallback glyph with code 0 */ |
| 675 | load_glyph(ctx, NULL, 0); |
| 676 | |
| 677 | /* set the tabsize in pixels */ |
| 678 | if ((err = load_glyph(ctx, &glyph, ' ')) < 0) { |
| 679 | av_log(ctx, AV_LOG_ERROR, "Could not set tabsize.\n"); |
| 680 | return err; |
| 681 | } |
| 682 | s->tabsize *= glyph->advance; |
| 683 | |
| 684 | if (s->exp_mode == EXP_STRFTIME && |
| 685 | (strchr(s->text, '%') || strchr(s->text, '\\'))) |
| 686 | av_log(ctx, AV_LOG_WARNING, "expansion=strftime is deprecated.\n"); |
| 687 | |
| 688 | av_bprint_init(&s->expanded_text, 0, AV_BPRINT_SIZE_UNLIMITED); |
| 689 | av_bprint_init(&s->expanded_fontcolor, 0, AV_BPRINT_SIZE_UNLIMITED); |
| 690 | |
| 691 | return 0; |
| 692 | } |
| 693 | |
| 694 | static int query_formats(AVFilterContext *ctx) |
| 695 | { |
| 696 | ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0)); |
| 697 | return 0; |
| 698 | } |
| 699 | |
| 700 | static int glyph_enu_free(void *opaque, void *elem) |
| 701 | { |
| 702 | Glyph *glyph = elem; |
| 703 | |
| 704 | FT_Done_Glyph(glyph->glyph); |
| 705 | FT_Done_Glyph(glyph->border_glyph); |
| 706 | av_free(elem); |
| 707 | return 0; |
| 708 | } |
| 709 | |
| 710 | static av_cold void uninit(AVFilterContext *ctx) |
| 711 | { |
| 712 | DrawTextContext *s = ctx->priv; |
| 713 | |
| 714 | av_expr_free(s->x_pexpr); |
| 715 | av_expr_free(s->y_pexpr); |
| 716 | #if FF_API_DRAWTEXT_OLD_TIMELINE |
| 717 | av_expr_free(s->draw_pexpr); |
| 718 | s->x_pexpr = s->y_pexpr = s->draw_pexpr = NULL; |
| 719 | #else |
| 720 | s->x_pexpr = s->y_pexpr = NULL; |
| 721 | #endif |
| 722 | av_freep(&s->positions); |
| 723 | s->nb_positions = 0; |
| 724 | |
| 725 | |
| 726 | av_tree_enumerate(s->glyphs, NULL, NULL, glyph_enu_free); |
| 727 | av_tree_destroy(s->glyphs); |
| 728 | s->glyphs = NULL; |
| 729 | |
| 730 | FT_Done_Face(s->face); |
| 731 | FT_Stroker_Done(s->stroker); |
| 732 | FT_Done_FreeType(s->library); |
| 733 | |
| 734 | av_bprint_finalize(&s->expanded_text, NULL); |
| 735 | av_bprint_finalize(&s->expanded_fontcolor, NULL); |
| 736 | } |
| 737 | |
| 738 | static int config_input(AVFilterLink *inlink) |
| 739 | { |
| 740 | AVFilterContext *ctx = inlink->dst; |
| 741 | DrawTextContext *s = ctx->priv; |
| 742 | int ret; |
| 743 | |
| 744 | ff_draw_init(&s->dc, inlink->format, 0); |
| 745 | ff_draw_color(&s->dc, &s->fontcolor, s->fontcolor.rgba); |
| 746 | ff_draw_color(&s->dc, &s->shadowcolor, s->shadowcolor.rgba); |
| 747 | ff_draw_color(&s->dc, &s->bordercolor, s->bordercolor.rgba); |
| 748 | ff_draw_color(&s->dc, &s->boxcolor, s->boxcolor.rgba); |
| 749 | |
| 750 | s->var_values[VAR_w] = s->var_values[VAR_W] = s->var_values[VAR_MAIN_W] = inlink->w; |
| 751 | s->var_values[VAR_h] = s->var_values[VAR_H] = s->var_values[VAR_MAIN_H] = inlink->h; |
| 752 | s->var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? av_q2d(inlink->sample_aspect_ratio) : 1; |
| 753 | s->var_values[VAR_DAR] = (double)inlink->w / inlink->h * s->var_values[VAR_SAR]; |
| 754 | s->var_values[VAR_HSUB] = 1 << s->dc.hsub_max; |
| 755 | s->var_values[VAR_VSUB] = 1 << s->dc.vsub_max; |
| 756 | s->var_values[VAR_X] = NAN; |
| 757 | s->var_values[VAR_Y] = NAN; |
| 758 | s->var_values[VAR_T] = NAN; |
| 759 | |
| 760 | av_lfg_init(&s->prng, av_get_random_seed()); |
| 761 | |
| 762 | av_expr_free(s->x_pexpr); |
| 763 | av_expr_free(s->y_pexpr); |
| 764 | #if FF_API_DRAWTEXT_OLD_TIMELINE |
| 765 | av_expr_free(s->draw_pexpr); |
| 766 | s->x_pexpr = s->y_pexpr = s->draw_pexpr = NULL; |
| 767 | #else |
| 768 | s->x_pexpr = s->y_pexpr = NULL; |
| 769 | #endif |
| 770 | |
| 771 | if ((ret = av_expr_parse(&s->x_pexpr, s->x_expr, var_names, |
| 772 | NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 || |
| 773 | (ret = av_expr_parse(&s->y_pexpr, s->y_expr, var_names, |
| 774 | NULL, NULL, fun2_names, fun2, 0, ctx)) < 0) |
| 775 | |
| 776 | return AVERROR(EINVAL); |
| 777 | #if FF_API_DRAWTEXT_OLD_TIMELINE |
| 778 | if (s->draw_expr && |
| 779 | (ret = av_expr_parse(&s->draw_pexpr, s->draw_expr, var_names, |
| 780 | NULL, NULL, fun2_names, fun2, 0, ctx)) < 0) |
| 781 | return ret; |
| 782 | #endif |
| 783 | |
| 784 | return 0; |
| 785 | } |
| 786 | |
| 787 | static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags) |
| 788 | { |
| 789 | DrawTextContext *s = ctx->priv; |
| 790 | |
| 791 | if (!strcmp(cmd, "reinit")) { |
| 792 | int ret; |
| 793 | uninit(ctx); |
| 794 | s->reinit = 1; |
| 795 | if ((ret = av_set_options_string(ctx, arg, "=", ":")) < 0) |
| 796 | return ret; |
| 797 | if ((ret = init(ctx)) < 0) |
| 798 | return ret; |
| 799 | return config_input(ctx->inputs[0]); |
| 800 | } |
| 801 | |
| 802 | return AVERROR(ENOSYS); |
| 803 | } |
| 804 | |
| 805 | static int func_pict_type(AVFilterContext *ctx, AVBPrint *bp, |
| 806 | char *fct, unsigned argc, char **argv, int tag) |
| 807 | { |
| 808 | DrawTextContext *s = ctx->priv; |
| 809 | |
| 810 | av_bprintf(bp, "%c", av_get_picture_type_char(s->var_values[VAR_PICT_TYPE])); |
| 811 | return 0; |
| 812 | } |
| 813 | |
| 814 | static int func_pts(AVFilterContext *ctx, AVBPrint *bp, |
| 815 | char *fct, unsigned argc, char **argv, int tag) |
| 816 | { |
| 817 | DrawTextContext *s = ctx->priv; |
| 818 | const char *fmt; |
| 819 | double pts = s->var_values[VAR_T]; |
| 820 | int ret; |
| 821 | |
| 822 | fmt = argc >= 1 ? argv[0] : "flt"; |
| 823 | if (argc >= 2) { |
| 824 | int64_t delta; |
| 825 | if ((ret = av_parse_time(&delta, argv[1], 1)) < 0) { |
| 826 | av_log(ctx, AV_LOG_ERROR, "Invalid delta '%s'\n", argv[1]); |
| 827 | return ret; |
| 828 | } |
| 829 | pts += (double)delta / AV_TIME_BASE; |
| 830 | } |
| 831 | if (!strcmp(fmt, "flt")) { |
| 832 | av_bprintf(bp, "%.6f", s->var_values[VAR_T]); |
| 833 | } else if (!strcmp(fmt, "hms")) { |
| 834 | if (isnan(pts)) { |
| 835 | av_bprintf(bp, " ??:??:??.???"); |
| 836 | } else { |
| 837 | int64_t ms = round(pts * 1000); |
| 838 | char sign = ' '; |
| 839 | if (ms < 0) { |
| 840 | sign = '-'; |
| 841 | ms = -ms; |
| 842 | } |
| 843 | av_bprintf(bp, "%c%02d:%02d:%02d.%03d", sign, |
| 844 | (int)(ms / (60 * 60 * 1000)), |
| 845 | (int)(ms / (60 * 1000)) % 60, |
| 846 | (int)(ms / 1000) % 60, |
| 847 | (int)ms % 1000); |
| 848 | } |
| 849 | } else { |
| 850 | av_log(ctx, AV_LOG_ERROR, "Invalid format '%s'\n", fmt); |
| 851 | return AVERROR(EINVAL); |
| 852 | } |
| 853 | return 0; |
| 854 | } |
| 855 | |
| 856 | static int func_frame_num(AVFilterContext *ctx, AVBPrint *bp, |
| 857 | char *fct, unsigned argc, char **argv, int tag) |
| 858 | { |
| 859 | DrawTextContext *s = ctx->priv; |
| 860 | |
| 861 | av_bprintf(bp, "%d", (int)s->var_values[VAR_N]); |
| 862 | return 0; |
| 863 | } |
| 864 | |
| 865 | static int func_metadata(AVFilterContext *ctx, AVBPrint *bp, |
| 866 | char *fct, unsigned argc, char **argv, int tag) |
| 867 | { |
| 868 | DrawTextContext *s = ctx->priv; |
| 869 | AVDictionaryEntry *e = av_dict_get(s->metadata, argv[0], NULL, 0); |
| 870 | |
| 871 | if (e && e->value) |
| 872 | av_bprintf(bp, "%s", e->value); |
| 873 | return 0; |
| 874 | } |
| 875 | |
| 876 | #if !HAVE_LOCALTIME_R |
| 877 | static void localtime_r(const time_t *t, struct tm *tm) |
| 878 | { |
| 879 | *tm = *localtime(t); |
| 880 | } |
| 881 | #endif |
| 882 | |
| 883 | static int func_strftime(AVFilterContext *ctx, AVBPrint *bp, |
| 884 | char *fct, unsigned argc, char **argv, int tag) |
| 885 | { |
| 886 | const char *fmt = argc ? argv[0] : "%Y-%m-%d %H:%M:%S"; |
| 887 | time_t now; |
| 888 | struct tm tm; |
| 889 | |
| 890 | time(&now); |
| 891 | if (tag == 'L') |
| 892 | localtime_r(&now, &tm); |
| 893 | else |
| 894 | tm = *gmtime(&now); |
| 895 | av_bprint_strftime(bp, fmt, &tm); |
| 896 | return 0; |
| 897 | } |
| 898 | |
| 899 | static int func_eval_expr(AVFilterContext *ctx, AVBPrint *bp, |
| 900 | char *fct, unsigned argc, char **argv, int tag) |
| 901 | { |
| 902 | DrawTextContext *s = ctx->priv; |
| 903 | double res; |
| 904 | int ret; |
| 905 | |
| 906 | ret = av_expr_parse_and_eval(&res, argv[0], var_names, s->var_values, |
| 907 | NULL, NULL, fun2_names, fun2, |
| 908 | &s->prng, 0, ctx); |
| 909 | if (ret < 0) |
| 910 | av_log(ctx, AV_LOG_ERROR, |
| 911 | "Expression '%s' for the expr text expansion function is not valid\n", |
| 912 | argv[0]); |
| 913 | else |
| 914 | av_bprintf(bp, "%f", res); |
| 915 | |
| 916 | return ret; |
| 917 | } |
| 918 | |
| 919 | static int func_eval_expr_int_format(AVFilterContext *ctx, AVBPrint *bp, |
| 920 | char *fct, unsigned argc, char **argv, int tag) |
| 921 | { |
| 922 | DrawTextContext *s = ctx->priv; |
| 923 | double res; |
| 924 | int intval; |
| 925 | int ret; |
| 926 | unsigned int positions = 0; |
| 927 | char fmt_str[30] = "%"; |
| 928 | |
| 929 | /* |
| 930 | * argv[0] expression to be converted to `int` |
| 931 | * argv[1] format: 'x', 'X', 'd' or 'u' |
| 932 | * argv[2] positions printed (optional) |
| 933 | */ |
| 934 | |
| 935 | ret = av_expr_parse_and_eval(&res, argv[0], var_names, s->var_values, |
| 936 | NULL, NULL, fun2_names, fun2, |
| 937 | &s->prng, 0, ctx); |
| 938 | if (ret < 0) { |
| 939 | av_log(ctx, AV_LOG_ERROR, |
| 940 | "Expression '%s' for the expr text expansion function is not valid\n", |
| 941 | argv[0]); |
| 942 | return ret; |
| 943 | } |
| 944 | |
| 945 | if (!strchr("xXdu", argv[1][0])) { |
| 946 | av_log(ctx, AV_LOG_ERROR, "Invalid format '%c' specified," |
| 947 | " allowed values: 'x', 'X', 'd', 'u'\n", argv[1][0]); |
| 948 | return AVERROR(EINVAL); |
| 949 | } |
| 950 | |
| 951 | if (argc == 3) { |
| 952 | ret = sscanf(argv[2], "%u", &positions); |
| 953 | if (ret != 1) { |
| 954 | av_log(ctx, AV_LOG_ERROR, "expr_int_format(): Invalid number of positions" |
| 955 | " to print: '%s'\n", argv[2]); |
| 956 | return AVERROR(EINVAL); |
| 957 | } |
| 958 | } |
| 959 | |
| 960 | feclearexcept(FE_ALL_EXCEPT); |
| 961 | intval = res; |
| 962 | if ((ret = fetestexcept(FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW))) { |
| 963 | av_log(ctx, AV_LOG_ERROR, "Conversion of floating-point result to int failed. Control register: 0x%08x. Conversion result: %d\n", ret, intval); |
| 964 | return AVERROR(EINVAL); |
| 965 | } |
| 966 | |
| 967 | if (argc == 3) |
| 968 | av_strlcatf(fmt_str, sizeof(fmt_str), "0%u", positions); |
| 969 | av_strlcatf(fmt_str, sizeof(fmt_str), "%c", argv[1][0]); |
| 970 | |
| 971 | av_log(ctx, AV_LOG_DEBUG, "Formatting value %f (expr '%s') with spec '%s'\n", |
| 972 | res, argv[0], fmt_str); |
| 973 | |
| 974 | av_bprintf(bp, fmt_str, intval); |
| 975 | |
| 976 | return 0; |
| 977 | } |
| 978 | |
| 979 | static const struct drawtext_function { |
| 980 | const char *name; |
| 981 | unsigned argc_min, argc_max; |
| 982 | int tag; /**< opaque argument to func */ |
| 983 | int (*func)(AVFilterContext *, AVBPrint *, char *, unsigned, char **, int); |
| 984 | } functions[] = { |
| 985 | { "expr", 1, 1, 0, func_eval_expr }, |
| 986 | { "e", 1, 1, 0, func_eval_expr }, |
| 987 | { "expr_int_format", 2, 3, 0, func_eval_expr_int_format }, |
| 988 | { "eif", 2, 3, 0, func_eval_expr_int_format }, |
| 989 | { "pict_type", 0, 0, 0, func_pict_type }, |
| 990 | { "pts", 0, 2, 0, func_pts }, |
| 991 | { "gmtime", 0, 1, 'G', func_strftime }, |
| 992 | { "localtime", 0, 1, 'L', func_strftime }, |
| 993 | { "frame_num", 0, 0, 0, func_frame_num }, |
| 994 | { "n", 0, 0, 0, func_frame_num }, |
| 995 | { "metadata", 1, 1, 0, func_metadata }, |
| 996 | }; |
| 997 | |
| 998 | static int eval_function(AVFilterContext *ctx, AVBPrint *bp, char *fct, |
| 999 | unsigned argc, char **argv) |
| 1000 | { |
| 1001 | unsigned i; |
| 1002 | |
| 1003 | for (i = 0; i < FF_ARRAY_ELEMS(functions); i++) { |
| 1004 | if (strcmp(fct, functions[i].name)) |
| 1005 | continue; |
| 1006 | if (argc < functions[i].argc_min) { |
| 1007 | av_log(ctx, AV_LOG_ERROR, "%%{%s} requires at least %d arguments\n", |
| 1008 | fct, functions[i].argc_min); |
| 1009 | return AVERROR(EINVAL); |
| 1010 | } |
| 1011 | if (argc > functions[i].argc_max) { |
| 1012 | av_log(ctx, AV_LOG_ERROR, "%%{%s} requires at most %d arguments\n", |
| 1013 | fct, functions[i].argc_max); |
| 1014 | return AVERROR(EINVAL); |
| 1015 | } |
| 1016 | break; |
| 1017 | } |
| 1018 | if (i >= FF_ARRAY_ELEMS(functions)) { |
| 1019 | av_log(ctx, AV_LOG_ERROR, "%%{%s} is not known\n", fct); |
| 1020 | return AVERROR(EINVAL); |
| 1021 | } |
| 1022 | return functions[i].func(ctx, bp, fct, argc, argv, functions[i].tag); |
| 1023 | } |
| 1024 | |
| 1025 | static int expand_function(AVFilterContext *ctx, AVBPrint *bp, char **rtext) |
| 1026 | { |
| 1027 | const char *text = *rtext; |
| 1028 | char *argv[16] = { NULL }; |
| 1029 | unsigned argc = 0, i; |
| 1030 | int ret; |
| 1031 | |
| 1032 | if (*text != '{') { |
| 1033 | av_log(ctx, AV_LOG_ERROR, "Stray %% near '%s'\n", text); |
| 1034 | return AVERROR(EINVAL); |
| 1035 | } |
| 1036 | text++; |
| 1037 | while (1) { |
| 1038 | if (!(argv[argc++] = av_get_token(&text, ":}"))) { |
| 1039 | ret = AVERROR(ENOMEM); |
| 1040 | goto end; |
| 1041 | } |
| 1042 | if (!*text) { |
| 1043 | av_log(ctx, AV_LOG_ERROR, "Unterminated %%{} near '%s'\n", *rtext); |
| 1044 | ret = AVERROR(EINVAL); |
| 1045 | goto end; |
| 1046 | } |
| 1047 | if (argc == FF_ARRAY_ELEMS(argv)) |
| 1048 | av_freep(&argv[--argc]); /* error will be caught later */ |
| 1049 | if (*text == '}') |
| 1050 | break; |
| 1051 | text++; |
| 1052 | } |
| 1053 | |
| 1054 | if ((ret = eval_function(ctx, bp, argv[0], argc - 1, argv + 1)) < 0) |
| 1055 | goto end; |
| 1056 | ret = 0; |
| 1057 | *rtext = (char *)text + 1; |
| 1058 | |
| 1059 | end: |
| 1060 | for (i = 0; i < argc; i++) |
| 1061 | av_freep(&argv[i]); |
| 1062 | return ret; |
| 1063 | } |
| 1064 | |
| 1065 | static int expand_text(AVFilterContext *ctx, char *text, AVBPrint *bp) |
| 1066 | { |
| 1067 | int ret; |
| 1068 | |
| 1069 | av_bprint_clear(bp); |
| 1070 | while (*text) { |
| 1071 | if (*text == '\\' && text[1]) { |
| 1072 | av_bprint_chars(bp, text[1], 1); |
| 1073 | text += 2; |
| 1074 | } else if (*text == '%') { |
| 1075 | text++; |
| 1076 | if ((ret = expand_function(ctx, bp, &text)) < 0) |
| 1077 | return ret; |
| 1078 | } else { |
| 1079 | av_bprint_chars(bp, *text, 1); |
| 1080 | text++; |
| 1081 | } |
| 1082 | } |
| 1083 | if (!av_bprint_is_complete(bp)) |
| 1084 | return AVERROR(ENOMEM); |
| 1085 | return 0; |
| 1086 | } |
| 1087 | |
| 1088 | static int draw_glyphs(DrawTextContext *s, AVFrame *frame, |
| 1089 | int width, int height, |
| 1090 | FFDrawColor *color, int x, int y, int borderw) |
| 1091 | { |
| 1092 | char *text = s->expanded_text.str; |
| 1093 | uint32_t code = 0; |
| 1094 | int i, x1, y1; |
| 1095 | uint8_t *p; |
| 1096 | Glyph *glyph = NULL; |
| 1097 | |
| 1098 | for (i = 0, p = text; *p; i++) { |
| 1099 | FT_Bitmap bitmap; |
| 1100 | Glyph dummy = { 0 }; |
| 1101 | GET_UTF8(code, *p++, continue;); |
| 1102 | |
| 1103 | /* skip new line chars, just go to new line */ |
| 1104 | if (code == '\n' || code == '\r' || code == '\t') |
| 1105 | continue; |
| 1106 | |
| 1107 | dummy.code = code; |
| 1108 | glyph = av_tree_find(s->glyphs, &dummy, (void *)glyph_cmp, NULL); |
| 1109 | |
| 1110 | bitmap = borderw ? glyph->border_bitmap : glyph->bitmap; |
| 1111 | |
| 1112 | if (glyph->bitmap.pixel_mode != FT_PIXEL_MODE_MONO && |
| 1113 | glyph->bitmap.pixel_mode != FT_PIXEL_MODE_GRAY) |
| 1114 | return AVERROR(EINVAL); |
| 1115 | |
| 1116 | x1 = s->positions[i].x+s->x+x - borderw; |
| 1117 | y1 = s->positions[i].y+s->y+y - borderw; |
| 1118 | |
| 1119 | ff_blend_mask(&s->dc, color, |
| 1120 | frame->data, frame->linesize, width, height, |
| 1121 | bitmap.buffer, bitmap.pitch, |
| 1122 | bitmap.width, bitmap.rows, |
| 1123 | bitmap.pixel_mode == FT_PIXEL_MODE_MONO ? 0 : 3, |
| 1124 | 0, x1, y1); |
| 1125 | } |
| 1126 | |
| 1127 | return 0; |
| 1128 | } |
| 1129 | |
| 1130 | static int draw_text(AVFilterContext *ctx, AVFrame *frame, |
| 1131 | int width, int height) |
| 1132 | { |
| 1133 | DrawTextContext *s = ctx->priv; |
| 1134 | AVFilterLink *inlink = ctx->inputs[0]; |
| 1135 | |
| 1136 | uint32_t code = 0, prev_code = 0; |
| 1137 | int x = 0, y = 0, i = 0, ret; |
| 1138 | int max_text_line_w = 0, len; |
| 1139 | int box_w, box_h; |
| 1140 | char *text; |
| 1141 | uint8_t *p; |
| 1142 | int y_min = 32000, y_max = -32000; |
| 1143 | int x_min = 32000, x_max = -32000; |
| 1144 | FT_Vector delta; |
| 1145 | Glyph *glyph = NULL, *prev_glyph = NULL; |
| 1146 | Glyph dummy = { 0 }; |
| 1147 | |
| 1148 | time_t now = time(0); |
| 1149 | struct tm ltime; |
| 1150 | AVBPrint *bp = &s->expanded_text; |
| 1151 | |
| 1152 | av_bprint_clear(bp); |
| 1153 | |
| 1154 | if(s->basetime != AV_NOPTS_VALUE) |
| 1155 | now= frame->pts*av_q2d(ctx->inputs[0]->time_base) + s->basetime/1000000; |
| 1156 | |
| 1157 | switch (s->exp_mode) { |
| 1158 | case EXP_NONE: |
| 1159 | av_bprintf(bp, "%s", s->text); |
| 1160 | break; |
| 1161 | case EXP_NORMAL: |
| 1162 | if ((ret = expand_text(ctx, s->text, &s->expanded_text)) < 0) |
| 1163 | return ret; |
| 1164 | break; |
| 1165 | case EXP_STRFTIME: |
| 1166 | localtime_r(&now, <ime); |
| 1167 | av_bprint_strftime(bp, s->text, <ime); |
| 1168 | break; |
| 1169 | } |
| 1170 | |
| 1171 | if (s->tc_opt_string) { |
| 1172 | char tcbuf[AV_TIMECODE_STR_SIZE]; |
| 1173 | av_timecode_make_string(&s->tc, tcbuf, inlink->frame_count); |
| 1174 | av_bprint_clear(bp); |
| 1175 | av_bprintf(bp, "%s%s", s->text, tcbuf); |
| 1176 | } |
| 1177 | |
| 1178 | if (!av_bprint_is_complete(bp)) |
| 1179 | return AVERROR(ENOMEM); |
| 1180 | text = s->expanded_text.str; |
| 1181 | if ((len = s->expanded_text.len) > s->nb_positions) { |
| 1182 | if (!(s->positions = |
| 1183 | av_realloc(s->positions, len*sizeof(*s->positions)))) |
| 1184 | return AVERROR(ENOMEM); |
| 1185 | s->nb_positions = len; |
| 1186 | } |
| 1187 | |
| 1188 | if (s->fontcolor_expr[0]) { |
| 1189 | /* If expression is set, evaluate and replace the static value */ |
| 1190 | av_bprint_clear(&s->expanded_fontcolor); |
| 1191 | if ((ret = expand_text(ctx, s->fontcolor_expr, &s->expanded_fontcolor)) < 0) |
| 1192 | return ret; |
| 1193 | if (!av_bprint_is_complete(&s->expanded_fontcolor)) |
| 1194 | return AVERROR(ENOMEM); |
| 1195 | av_log(s, AV_LOG_DEBUG, "Evaluated fontcolor is '%s'\n", s->expanded_fontcolor.str); |
| 1196 | ret = av_parse_color(s->fontcolor.rgba, s->expanded_fontcolor.str, -1, s); |
| 1197 | if (ret) |
| 1198 | return ret; |
| 1199 | ff_draw_color(&s->dc, &s->fontcolor, s->fontcolor.rgba); |
| 1200 | } |
| 1201 | |
| 1202 | x = 0; |
| 1203 | y = 0; |
| 1204 | |
| 1205 | /* load and cache glyphs */ |
| 1206 | for (i = 0, p = text; *p; i++) { |
| 1207 | GET_UTF8(code, *p++, continue;); |
| 1208 | |
| 1209 | /* get glyph */ |
| 1210 | dummy.code = code; |
| 1211 | glyph = av_tree_find(s->glyphs, &dummy, glyph_cmp, NULL); |
| 1212 | if (!glyph) { |
| 1213 | load_glyph(ctx, &glyph, code); |
| 1214 | } |
| 1215 | |
| 1216 | y_min = FFMIN(glyph->bbox.yMin, y_min); |
| 1217 | y_max = FFMAX(glyph->bbox.yMax, y_max); |
| 1218 | x_min = FFMIN(glyph->bbox.xMin, x_min); |
| 1219 | x_max = FFMAX(glyph->bbox.xMax, x_max); |
| 1220 | } |
| 1221 | s->max_glyph_h = y_max - y_min; |
| 1222 | s->max_glyph_w = x_max - x_min; |
| 1223 | |
| 1224 | /* compute and save position for each glyph */ |
| 1225 | glyph = NULL; |
| 1226 | for (i = 0, p = text; *p; i++) { |
| 1227 | GET_UTF8(code, *p++, continue;); |
| 1228 | |
| 1229 | /* skip the \n in the sequence \r\n */ |
| 1230 | if (prev_code == '\r' && code == '\n') |
| 1231 | continue; |
| 1232 | |
| 1233 | prev_code = code; |
| 1234 | if (is_newline(code)) { |
| 1235 | |
| 1236 | max_text_line_w = FFMAX(max_text_line_w, x); |
| 1237 | y += s->max_glyph_h; |
| 1238 | x = 0; |
| 1239 | continue; |
| 1240 | } |
| 1241 | |
| 1242 | /* get glyph */ |
| 1243 | prev_glyph = glyph; |
| 1244 | dummy.code = code; |
| 1245 | glyph = av_tree_find(s->glyphs, &dummy, glyph_cmp, NULL); |
| 1246 | |
| 1247 | /* kerning */ |
| 1248 | if (s->use_kerning && prev_glyph && glyph->code) { |
| 1249 | FT_Get_Kerning(s->face, prev_glyph->code, glyph->code, |
| 1250 | ft_kerning_default, &delta); |
| 1251 | x += delta.x >> 6; |
| 1252 | } |
| 1253 | |
| 1254 | /* save position */ |
| 1255 | s->positions[i].x = x + glyph->bitmap_left; |
| 1256 | s->positions[i].y = y - glyph->bitmap_top + y_max; |
| 1257 | if (code == '\t') x = (x / s->tabsize + 1)*s->tabsize; |
| 1258 | else x += glyph->advance; |
| 1259 | } |
| 1260 | |
| 1261 | max_text_line_w = FFMAX(x, max_text_line_w); |
| 1262 | |
| 1263 | s->var_values[VAR_TW] = s->var_values[VAR_TEXT_W] = max_text_line_w; |
| 1264 | s->var_values[VAR_TH] = s->var_values[VAR_TEXT_H] = y + s->max_glyph_h; |
| 1265 | |
| 1266 | s->var_values[VAR_MAX_GLYPH_W] = s->max_glyph_w; |
| 1267 | s->var_values[VAR_MAX_GLYPH_H] = s->max_glyph_h; |
| 1268 | s->var_values[VAR_MAX_GLYPH_A] = s->var_values[VAR_ASCENT ] = y_max; |
| 1269 | s->var_values[VAR_MAX_GLYPH_D] = s->var_values[VAR_DESCENT] = y_min; |
| 1270 | |
| 1271 | s->var_values[VAR_LINE_H] = s->var_values[VAR_LH] = s->max_glyph_h; |
| 1272 | |
| 1273 | s->x = s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, &s->prng); |
| 1274 | s->y = s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, &s->prng); |
| 1275 | s->x = s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, &s->prng); |
| 1276 | #if FF_API_DRAWTEXT_OLD_TIMELINE |
| 1277 | if (s->draw_pexpr){ |
| 1278 | s->draw = av_expr_eval(s->draw_pexpr, s->var_values, &s->prng); |
| 1279 | |
| 1280 | if(!s->draw) |
| 1281 | return 0; |
| 1282 | } |
| 1283 | if (ctx->is_disabled) |
| 1284 | return 0; |
| 1285 | #endif |
| 1286 | |
| 1287 | box_w = FFMIN(width - 1 , max_text_line_w); |
| 1288 | box_h = FFMIN(height - 1, y + s->max_glyph_h); |
| 1289 | |
| 1290 | /* draw box */ |
| 1291 | if (s->draw_box) |
| 1292 | ff_blend_rectangle(&s->dc, &s->boxcolor, |
| 1293 | frame->data, frame->linesize, width, height, |
| 1294 | s->x, s->y, box_w, box_h); |
| 1295 | |
| 1296 | if (s->shadowx || s->shadowy) { |
| 1297 | if ((ret = draw_glyphs(s, frame, width, height, |
| 1298 | &s->shadowcolor, s->shadowx, s->shadowy, 0)) < 0) |
| 1299 | return ret; |
| 1300 | } |
| 1301 | |
| 1302 | if (s->borderw) { |
| 1303 | if ((ret = draw_glyphs(s, frame, width, height, |
| 1304 | &s->bordercolor, 0, 0, s->borderw)) < 0) |
| 1305 | return ret; |
| 1306 | } |
| 1307 | if ((ret = draw_glyphs(s, frame, width, height, |
| 1308 | &s->fontcolor, 0, 0, 0)) < 0) |
| 1309 | return ret; |
| 1310 | |
| 1311 | return 0; |
| 1312 | } |
| 1313 | |
| 1314 | static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
| 1315 | { |
| 1316 | AVFilterContext *ctx = inlink->dst; |
| 1317 | AVFilterLink *outlink = ctx->outputs[0]; |
| 1318 | DrawTextContext *s = ctx->priv; |
| 1319 | int ret; |
| 1320 | |
| 1321 | if (s->reload) { |
| 1322 | if ((ret = load_textfile(ctx)) < 0) |
| 1323 | return ret; |
| 1324 | #if CONFIG_LIBFRIBIDI |
| 1325 | if (s->text_shaping) |
| 1326 | if ((ret = shape_text(ctx)) < 0) |
| 1327 | return ret; |
| 1328 | #endif |
| 1329 | } |
| 1330 | |
| 1331 | s->var_values[VAR_N] = inlink->frame_count+s->start_number; |
| 1332 | s->var_values[VAR_T] = frame->pts == AV_NOPTS_VALUE ? |
| 1333 | NAN : frame->pts * av_q2d(inlink->time_base); |
| 1334 | |
| 1335 | s->var_values[VAR_PICT_TYPE] = frame->pict_type; |
| 1336 | s->metadata = av_frame_get_metadata(frame); |
| 1337 | |
| 1338 | draw_text(ctx, frame, frame->width, frame->height); |
| 1339 | |
| 1340 | av_log(ctx, AV_LOG_DEBUG, "n:%d t:%f text_w:%d text_h:%d x:%d y:%d\n", |
| 1341 | (int)s->var_values[VAR_N], s->var_values[VAR_T], |
| 1342 | (int)s->var_values[VAR_TEXT_W], (int)s->var_values[VAR_TEXT_H], |
| 1343 | s->x, s->y); |
| 1344 | |
| 1345 | return ff_filter_frame(outlink, frame); |
| 1346 | } |
| 1347 | |
| 1348 | static const AVFilterPad avfilter_vf_drawtext_inputs[] = { |
| 1349 | { |
| 1350 | .name = "default", |
| 1351 | .type = AVMEDIA_TYPE_VIDEO, |
| 1352 | .filter_frame = filter_frame, |
| 1353 | .config_props = config_input, |
| 1354 | .needs_writable = 1, |
| 1355 | }, |
| 1356 | { NULL } |
| 1357 | }; |
| 1358 | |
| 1359 | static const AVFilterPad avfilter_vf_drawtext_outputs[] = { |
| 1360 | { |
| 1361 | .name = "default", |
| 1362 | .type = AVMEDIA_TYPE_VIDEO, |
| 1363 | }, |
| 1364 | { NULL } |
| 1365 | }; |
| 1366 | |
| 1367 | AVFilter ff_vf_drawtext = { |
| 1368 | .name = "drawtext", |
| 1369 | .description = NULL_IF_CONFIG_SMALL("Draw text on top of video frames using libfreetype library."), |
| 1370 | .priv_size = sizeof(DrawTextContext), |
| 1371 | .priv_class = &drawtext_class, |
| 1372 | .init = init, |
| 1373 | .uninit = uninit, |
| 1374 | .query_formats = query_formats, |
| 1375 | .inputs = avfilter_vf_drawtext_inputs, |
| 1376 | .outputs = avfilter_vf_drawtext_outputs, |
| 1377 | .process_command = command, |
| 1378 | #if FF_API_DRAWTEXT_OLD_TIMELINE |
| 1379 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, |
| 1380 | #else |
| 1381 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
| 1382 | #endif |
| 1383 | }; |