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2ba45a60 DM |
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" | |
f6fa7814 | 55 | #include "libavutil/time_internal.h" |
2ba45a60 DM |
56 | #include "libavutil/tree.h" |
57 | #include "libavutil/lfg.h" | |
58 | #include "avfilter.h" | |
59 | #include "drawutils.h" | |
60 | #include "formats.h" | |
61 | #include "internal.h" | |
62 | #include "video.h" | |
63 | ||
64 | #if CONFIG_LIBFRIBIDI | |
65 | #include <fribidi.h> | |
66 | #endif | |
67 | ||
68 | #include <ft2build.h> | |
69 | #include FT_FREETYPE_H | |
70 | #include FT_GLYPH_H | |
71 | #include FT_STROKER_H | |
72 | ||
73 | static const char *const var_names[] = { | |
74 | "dar", | |
75 | "hsub", "vsub", | |
76 | "line_h", "lh", ///< line height, same as max_glyph_h | |
77 | "main_h", "h", "H", ///< height of the input video | |
78 | "main_w", "w", "W", ///< width of the input video | |
79 | "max_glyph_a", "ascent", ///< max glyph ascent | |
80 | "max_glyph_d", "descent", ///< min glyph descent | |
81 | "max_glyph_h", ///< max glyph height | |
82 | "max_glyph_w", ///< max glyph width | |
83 | "n", ///< number of frame | |
84 | "sar", | |
85 | "t", ///< timestamp expressed in seconds | |
86 | "text_h", "th", ///< height of the rendered text | |
87 | "text_w", "tw", ///< width of the rendered text | |
88 | "x", | |
89 | "y", | |
90 | "pict_type", | |
91 | NULL | |
92 | }; | |
93 | ||
94 | static const char *const fun2_names[] = { | |
95 | "rand" | |
96 | }; | |
97 | ||
98 | static double drand(void *opaque, double min, double max) | |
99 | { | |
100 | return min + (max-min) / UINT_MAX * av_lfg_get(opaque); | |
101 | } | |
102 | ||
103 | typedef double (*eval_func2)(void *, double a, double b); | |
104 | ||
105 | static const eval_func2 fun2[] = { | |
106 | drand, | |
107 | NULL | |
108 | }; | |
109 | ||
110 | enum var_name { | |
111 | VAR_DAR, | |
112 | VAR_HSUB, VAR_VSUB, | |
113 | VAR_LINE_H, VAR_LH, | |
114 | VAR_MAIN_H, VAR_h, VAR_H, | |
115 | VAR_MAIN_W, VAR_w, VAR_W, | |
116 | VAR_MAX_GLYPH_A, VAR_ASCENT, | |
117 | VAR_MAX_GLYPH_D, VAR_DESCENT, | |
118 | VAR_MAX_GLYPH_H, | |
119 | VAR_MAX_GLYPH_W, | |
120 | VAR_N, | |
121 | VAR_SAR, | |
122 | VAR_T, | |
123 | VAR_TEXT_H, VAR_TH, | |
124 | VAR_TEXT_W, VAR_TW, | |
125 | VAR_X, | |
126 | VAR_Y, | |
127 | VAR_PICT_TYPE, | |
128 | VAR_VARS_NB | |
129 | }; | |
130 | ||
131 | enum expansion_mode { | |
132 | EXP_NONE, | |
133 | EXP_NORMAL, | |
134 | EXP_STRFTIME, | |
135 | }; | |
136 | ||
137 | typedef struct DrawTextContext { | |
138 | const AVClass *class; | |
139 | enum expansion_mode exp_mode; ///< expansion mode to use for the text | |
140 | int reinit; ///< tells if the filter is being reinited | |
141 | #if CONFIG_LIBFONTCONFIG | |
142 | uint8_t *font; ///< font to be used | |
143 | #endif | |
144 | uint8_t *fontfile; ///< font to be used | |
145 | uint8_t *text; ///< text to be drawn | |
146 | AVBPrint expanded_text; ///< used to contain the expanded text | |
147 | uint8_t *fontcolor_expr; ///< fontcolor expression to evaluate | |
148 | AVBPrint expanded_fontcolor; ///< used to contain the expanded fontcolor spec | |
149 | int ft_load_flags; ///< flags used for loading fonts, see FT_LOAD_* | |
150 | FT_Vector *positions; ///< positions for each element in the text | |
151 | size_t nb_positions; ///< number of elements of positions array | |
152 | char *textfile; ///< file with text to be drawn | |
153 | int x; ///< x position to start drawing text | |
154 | int y; ///< y position to start drawing text | |
155 | int max_glyph_w; ///< max glyph width | |
156 | int max_glyph_h; ///< max glyph height | |
157 | int shadowx, shadowy; | |
158 | int borderw; ///< border width | |
159 | unsigned int fontsize; ///< font size to use | |
160 | ||
161 | short int draw_box; ///< draw box around text - true or false | |
162 | int use_kerning; ///< font kerning is used - true/false | |
163 | int tabsize; ///< tab size | |
164 | int fix_bounds; ///< do we let it go out of frame bounds - t/f | |
165 | ||
166 | FFDrawContext dc; | |
167 | FFDrawColor fontcolor; ///< foreground color | |
168 | FFDrawColor shadowcolor; ///< shadow color | |
169 | FFDrawColor bordercolor; ///< border color | |
170 | FFDrawColor boxcolor; ///< background color | |
171 | ||
172 | FT_Library library; ///< freetype font library handle | |
173 | FT_Face face; ///< freetype font face handle | |
174 | FT_Stroker stroker; ///< freetype stroker handle | |
175 | struct AVTreeNode *glyphs; ///< rendered glyphs, stored using the UTF-32 char code | |
176 | char *x_expr; ///< expression for x position | |
177 | char *y_expr; ///< expression for y position | |
178 | AVExpr *x_pexpr, *y_pexpr; ///< parsed expressions for x and y | |
179 | int64_t basetime; ///< base pts time in the real world for display | |
180 | double var_values[VAR_VARS_NB]; | |
2ba45a60 DM |
181 | AVLFG prng; ///< random |
182 | char *tc_opt_string; ///< specified timecode option string | |
183 | AVRational tc_rate; ///< frame rate for timecode | |
184 | AVTimecode tc; ///< timecode context | |
185 | int tc24hmax; ///< 1 if timecode is wrapped to 24 hours, 0 otherwise | |
186 | int reload; ///< reload text file for each frame | |
187 | int start_number; ///< starting frame number for n/frame_num var | |
188 | #if CONFIG_LIBFRIBIDI | |
189 | int text_shaping; ///< 1 to shape the text before drawing it | |
190 | #endif | |
191 | AVDictionary *metadata; | |
192 | } DrawTextContext; | |
193 | ||
194 | #define OFFSET(x) offsetof(DrawTextContext, x) | |
195 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM | |
196 | ||
197 | static const AVOption drawtext_options[]= { | |
198 | {"fontfile", "set font file", OFFSET(fontfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, | |
199 | {"text", "set text", OFFSET(text), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, | |
200 | {"textfile", "set text file", OFFSET(textfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, | |
201 | {"fontcolor", "set foreground color", OFFSET(fontcolor.rgba), AV_OPT_TYPE_COLOR, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS}, | |
202 | {"fontcolor_expr", "set foreground color expression", OFFSET(fontcolor_expr), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS}, | |
203 | {"boxcolor", "set box color", OFFSET(boxcolor.rgba), AV_OPT_TYPE_COLOR, {.str="white"}, CHAR_MIN, CHAR_MAX, FLAGS}, | |
204 | {"bordercolor", "set border color", OFFSET(bordercolor.rgba), AV_OPT_TYPE_COLOR, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS}, | |
205 | {"shadowcolor", "set shadow color", OFFSET(shadowcolor.rgba), AV_OPT_TYPE_COLOR, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS}, | |
206 | {"box", "set box", OFFSET(draw_box), AV_OPT_TYPE_INT, {.i64=0}, 0, 1 , FLAGS}, | |
207 | {"fontsize", "set font size", OFFSET(fontsize), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX , FLAGS}, | |
208 | {"x", "set x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX, FLAGS}, | |
209 | {"y", "set y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX, FLAGS}, | |
210 | {"shadowx", "set x", OFFSET(shadowx), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX , FLAGS}, | |
211 | {"shadowy", "set y", OFFSET(shadowy), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX , FLAGS}, | |
212 | {"borderw", "set border width", OFFSET(borderw), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX , FLAGS}, | |
213 | {"tabsize", "set tab size", OFFSET(tabsize), AV_OPT_TYPE_INT, {.i64=4}, 0, INT_MAX , FLAGS}, | |
214 | {"basetime", "set base time", OFFSET(basetime), AV_OPT_TYPE_INT64, {.i64=AV_NOPTS_VALUE}, INT64_MIN, INT64_MAX , FLAGS}, | |
2ba45a60 DM |
215 | #if CONFIG_LIBFONTCONFIG |
216 | { "font", "Font name", OFFSET(font), AV_OPT_TYPE_STRING, { .str = "Sans" }, .flags = FLAGS }, | |
217 | #endif | |
218 | ||
219 | {"expansion", "set the expansion mode", OFFSET(exp_mode), AV_OPT_TYPE_INT, {.i64=EXP_NORMAL}, 0, 2, FLAGS, "expansion"}, | |
220 | {"none", "set no expansion", OFFSET(exp_mode), AV_OPT_TYPE_CONST, {.i64=EXP_NONE}, 0, 0, FLAGS, "expansion"}, | |
221 | {"normal", "set normal expansion", OFFSET(exp_mode), AV_OPT_TYPE_CONST, {.i64=EXP_NORMAL}, 0, 0, FLAGS, "expansion"}, | |
222 | {"strftime", "set strftime expansion (deprecated)", OFFSET(exp_mode), AV_OPT_TYPE_CONST, {.i64=EXP_STRFTIME}, 0, 0, FLAGS, "expansion"}, | |
223 | ||
224 | {"timecode", "set initial timecode", OFFSET(tc_opt_string), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, | |
225 | {"tc24hmax", "set 24 hours max (timecode only)", OFFSET(tc24hmax), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS}, | |
226 | {"timecode_rate", "set rate (timecode only)", OFFSET(tc_rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS}, | |
227 | {"r", "set rate (timecode only)", OFFSET(tc_rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS}, | |
228 | {"rate", "set rate (timecode only)", OFFSET(tc_rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS}, | |
229 | {"reload", "reload text file for each frame", OFFSET(reload), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS}, | |
230 | {"fix_bounds", "if true, check and fix text coords to avoid clipping", OFFSET(fix_bounds), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS}, | |
231 | {"start_number", "start frame number for n/frame_num variable", OFFSET(start_number), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS}, | |
232 | ||
233 | #if CONFIG_LIBFRIBIDI | |
234 | {"text_shaping", "attempt to shape text before drawing", OFFSET(text_shaping), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS}, | |
235 | #endif | |
236 | ||
237 | /* FT_LOAD_* flags */ | |
238 | { "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" }, | |
239 | { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_DEFAULT }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
240 | { "no_scale", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_SCALE }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
241 | { "no_hinting", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_HINTING }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
242 | { "render", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_RENDER }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
243 | { "no_bitmap", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_BITMAP }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
244 | { "vertical_layout", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_VERTICAL_LAYOUT }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
245 | { "force_autohint", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_FORCE_AUTOHINT }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
246 | { "crop_bitmap", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_CROP_BITMAP }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
247 | { "pedantic", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_PEDANTIC }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
248 | { "ignore_global_advance_width", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
249 | { "no_recurse", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_RECURSE }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
250 | { "ignore_transform", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_IGNORE_TRANSFORM }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
251 | { "monochrome", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_MONOCHROME }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
252 | { "linear_design", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_LINEAR_DESIGN }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
253 | { "no_autohint", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_AUTOHINT }, .flags = FLAGS, .unit = "ft_load_flags" }, | |
254 | { NULL } | |
255 | }; | |
256 | ||
257 | AVFILTER_DEFINE_CLASS(drawtext); | |
258 | ||
259 | #undef __FTERRORS_H__ | |
260 | #define FT_ERROR_START_LIST { | |
261 | #define FT_ERRORDEF(e, v, s) { (e), (s) }, | |
262 | #define FT_ERROR_END_LIST { 0, NULL } }; | |
263 | ||
264 | static const struct ft_error | |
265 | { | |
266 | int err; | |
267 | const char *err_msg; | |
268 | } ft_errors[] = | |
269 | #include FT_ERRORS_H | |
270 | ||
271 | #define FT_ERRMSG(e) ft_errors[e].err_msg | |
272 | ||
273 | typedef struct Glyph { | |
274 | FT_Glyph glyph; | |
275 | FT_Glyph border_glyph; | |
276 | uint32_t code; | |
277 | FT_Bitmap bitmap; ///< array holding bitmaps of font | |
278 | FT_Bitmap border_bitmap; ///< array holding bitmaps of font border | |
279 | FT_BBox bbox; | |
280 | int advance; | |
281 | int bitmap_left; | |
282 | int bitmap_top; | |
283 | } Glyph; | |
284 | ||
285 | static int glyph_cmp(void *key, const void *b) | |
286 | { | |
287 | const Glyph *a = key, *bb = b; | |
288 | int64_t diff = (int64_t)a->code - (int64_t)bb->code; | |
289 | return diff > 0 ? 1 : diff < 0 ? -1 : 0; | |
290 | } | |
291 | ||
292 | /** | |
293 | * Load glyphs corresponding to the UTF-32 codepoint code. | |
294 | */ | |
295 | static int load_glyph(AVFilterContext *ctx, Glyph **glyph_ptr, uint32_t code) | |
296 | { | |
297 | DrawTextContext *s = ctx->priv; | |
298 | FT_BitmapGlyph bitmapglyph; | |
299 | Glyph *glyph; | |
300 | struct AVTreeNode *node = NULL; | |
301 | int ret; | |
302 | ||
303 | /* load glyph into s->face->glyph */ | |
304 | if (FT_Load_Char(s->face, code, s->ft_load_flags)) | |
305 | return AVERROR(EINVAL); | |
306 | ||
307 | glyph = av_mallocz(sizeof(*glyph)); | |
308 | if (!glyph) { | |
309 | ret = AVERROR(ENOMEM); | |
310 | goto error; | |
311 | } | |
312 | glyph->code = code; | |
313 | ||
314 | if (FT_Get_Glyph(s->face->glyph, &glyph->glyph)) { | |
315 | ret = AVERROR(EINVAL); | |
316 | goto error; | |
317 | } | |
318 | if (s->borderw) { | |
319 | glyph->border_glyph = glyph->glyph; | |
320 | if (FT_Glyph_StrokeBorder(&glyph->border_glyph, s->stroker, 0, 0) || | |
321 | FT_Glyph_To_Bitmap(&glyph->border_glyph, FT_RENDER_MODE_NORMAL, 0, 1)) { | |
322 | ret = AVERROR_EXTERNAL; | |
323 | goto error; | |
324 | } | |
325 | bitmapglyph = (FT_BitmapGlyph) glyph->border_glyph; | |
326 | glyph->border_bitmap = bitmapglyph->bitmap; | |
327 | } | |
328 | if (FT_Glyph_To_Bitmap(&glyph->glyph, FT_RENDER_MODE_NORMAL, 0, 1)) { | |
329 | ret = AVERROR_EXTERNAL; | |
330 | goto error; | |
331 | } | |
332 | bitmapglyph = (FT_BitmapGlyph) glyph->glyph; | |
333 | ||
334 | glyph->bitmap = bitmapglyph->bitmap; | |
335 | glyph->bitmap_left = bitmapglyph->left; | |
336 | glyph->bitmap_top = bitmapglyph->top; | |
337 | glyph->advance = s->face->glyph->advance.x >> 6; | |
338 | ||
339 | /* measure text height to calculate text_height (or the maximum text height) */ | |
340 | FT_Glyph_Get_CBox(glyph->glyph, ft_glyph_bbox_pixels, &glyph->bbox); | |
341 | ||
342 | /* cache the newly created glyph */ | |
343 | if (!(node = av_tree_node_alloc())) { | |
344 | ret = AVERROR(ENOMEM); | |
345 | goto error; | |
346 | } | |
347 | av_tree_insert(&s->glyphs, glyph, glyph_cmp, &node); | |
348 | ||
349 | if (glyph_ptr) | |
350 | *glyph_ptr = glyph; | |
351 | return 0; | |
352 | ||
353 | error: | |
354 | if (glyph) | |
355 | av_freep(&glyph->glyph); | |
356 | ||
357 | av_freep(&glyph); | |
358 | av_freep(&node); | |
359 | return ret; | |
360 | } | |
361 | ||
362 | static int load_font_file(AVFilterContext *ctx, const char *path, int index) | |
363 | { | |
364 | DrawTextContext *s = ctx->priv; | |
365 | int err; | |
366 | ||
367 | err = FT_New_Face(s->library, path, index, &s->face); | |
368 | if (err) { | |
369 | av_log(ctx, AV_LOG_ERROR, "Could not load font \"%s\": %s\n", | |
370 | s->fontfile, FT_ERRMSG(err)); | |
371 | return AVERROR(EINVAL); | |
372 | } | |
373 | return 0; | |
374 | } | |
375 | ||
376 | #if CONFIG_LIBFONTCONFIG | |
377 | static int load_font_fontconfig(AVFilterContext *ctx) | |
378 | { | |
379 | DrawTextContext *s = ctx->priv; | |
380 | FcConfig *fontconfig; | |
381 | FcPattern *pat, *best; | |
382 | FcResult result = FcResultMatch; | |
383 | FcChar8 *filename; | |
384 | int index; | |
385 | double size; | |
386 | int err = AVERROR(ENOENT); | |
387 | ||
388 | fontconfig = FcInitLoadConfigAndFonts(); | |
389 | if (!fontconfig) { | |
390 | av_log(ctx, AV_LOG_ERROR, "impossible to init fontconfig\n"); | |
391 | return AVERROR_UNKNOWN; | |
392 | } | |
393 | pat = FcNameParse(s->fontfile ? s->fontfile : | |
394 | (uint8_t *)(intptr_t)"default"); | |
395 | if (!pat) { | |
396 | av_log(ctx, AV_LOG_ERROR, "could not parse fontconfig pat"); | |
397 | return AVERROR(EINVAL); | |
398 | } | |
399 | ||
400 | FcPatternAddString(pat, FC_FAMILY, s->font); | |
401 | if (s->fontsize) | |
402 | FcPatternAddDouble(pat, FC_SIZE, (double)s->fontsize); | |
403 | ||
404 | FcDefaultSubstitute(pat); | |
405 | ||
406 | if (!FcConfigSubstitute(fontconfig, pat, FcMatchPattern)) { | |
407 | av_log(ctx, AV_LOG_ERROR, "could not substitue fontconfig options"); /* very unlikely */ | |
408 | FcPatternDestroy(pat); | |
409 | return AVERROR(ENOMEM); | |
410 | } | |
411 | ||
412 | best = FcFontMatch(fontconfig, pat, &result); | |
413 | FcPatternDestroy(pat); | |
414 | ||
415 | if (!best || result != FcResultMatch) { | |
416 | av_log(ctx, AV_LOG_ERROR, | |
417 | "Cannot find a valid font for the family %s\n", | |
418 | s->font); | |
419 | goto fail; | |
420 | } | |
421 | ||
422 | if ( | |
423 | FcPatternGetInteger(best, FC_INDEX, 0, &index ) != FcResultMatch || | |
424 | FcPatternGetDouble (best, FC_SIZE, 0, &size ) != FcResultMatch) { | |
425 | av_log(ctx, AV_LOG_ERROR, "impossible to find font information"); | |
426 | return AVERROR(EINVAL); | |
427 | } | |
428 | ||
429 | if (FcPatternGetString(best, FC_FILE, 0, &filename) != FcResultMatch) { | |
430 | av_log(ctx, AV_LOG_ERROR, "No file path for %s\n", | |
431 | s->font); | |
432 | goto fail; | |
433 | } | |
434 | ||
435 | av_log(ctx, AV_LOG_INFO, "Using \"%s\"\n", filename); | |
436 | if (!s->fontsize) | |
437 | s->fontsize = size + 0.5; | |
438 | ||
439 | err = load_font_file(ctx, filename, index); | |
440 | if (err) | |
441 | return err; | |
442 | FcConfigDestroy(fontconfig); | |
443 | fail: | |
444 | FcPatternDestroy(best); | |
445 | return err; | |
446 | } | |
447 | #endif | |
448 | ||
449 | static int load_font(AVFilterContext *ctx) | |
450 | { | |
451 | DrawTextContext *s = ctx->priv; | |
452 | int err; | |
453 | ||
454 | /* load the face, and set up the encoding, which is by default UTF-8 */ | |
455 | err = load_font_file(ctx, s->fontfile, 0); | |
456 | if (!err) | |
457 | return 0; | |
458 | #if CONFIG_LIBFONTCONFIG | |
459 | err = load_font_fontconfig(ctx); | |
460 | if (!err) | |
461 | return 0; | |
462 | #endif | |
463 | return err; | |
464 | } | |
465 | ||
466 | static int load_textfile(AVFilterContext *ctx) | |
467 | { | |
468 | DrawTextContext *s = ctx->priv; | |
469 | int err; | |
470 | uint8_t *textbuf; | |
471 | uint8_t *tmp; | |
472 | size_t textbuf_size; | |
473 | ||
474 | if ((err = av_file_map(s->textfile, &textbuf, &textbuf_size, 0, ctx)) < 0) { | |
475 | av_log(ctx, AV_LOG_ERROR, | |
476 | "The text file '%s' could not be read or is empty\n", | |
477 | s->textfile); | |
478 | return err; | |
479 | } | |
480 | ||
f6fa7814 | 481 | if (textbuf_size > SIZE_MAX - 1 || !(tmp = av_realloc(s->text, textbuf_size + 1))) { |
2ba45a60 DM |
482 | av_file_unmap(textbuf, textbuf_size); |
483 | return AVERROR(ENOMEM); | |
484 | } | |
485 | s->text = tmp; | |
486 | memcpy(s->text, textbuf, textbuf_size); | |
487 | s->text[textbuf_size] = 0; | |
488 | av_file_unmap(textbuf, textbuf_size); | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
493 | static inline int is_newline(uint32_t c) | |
494 | { | |
495 | return c == '\n' || c == '\r' || c == '\f' || c == '\v'; | |
496 | } | |
497 | ||
498 | #if CONFIG_LIBFRIBIDI | |
499 | static int shape_text(AVFilterContext *ctx) | |
500 | { | |
501 | DrawTextContext *s = ctx->priv; | |
502 | uint8_t *tmp; | |
503 | int ret = AVERROR(ENOMEM); | |
504 | static const FriBidiFlags flags = FRIBIDI_FLAGS_DEFAULT | | |
505 | FRIBIDI_FLAGS_ARABIC; | |
506 | FriBidiChar *unicodestr = NULL; | |
507 | FriBidiStrIndex len; | |
508 | FriBidiParType direction = FRIBIDI_PAR_LTR; | |
509 | FriBidiStrIndex line_start = 0; | |
510 | FriBidiStrIndex line_end = 0; | |
511 | FriBidiLevel *embedding_levels = NULL; | |
512 | FriBidiArabicProp *ar_props = NULL; | |
513 | FriBidiCharType *bidi_types = NULL; | |
514 | FriBidiStrIndex i,j; | |
515 | ||
516 | len = strlen(s->text); | |
517 | if (!(unicodestr = av_malloc_array(len, sizeof(*unicodestr)))) { | |
518 | goto out; | |
519 | } | |
520 | len = fribidi_charset_to_unicode(FRIBIDI_CHAR_SET_UTF8, | |
521 | s->text, len, unicodestr); | |
522 | ||
523 | bidi_types = av_malloc_array(len, sizeof(*bidi_types)); | |
524 | if (!bidi_types) { | |
525 | goto out; | |
526 | } | |
527 | ||
528 | fribidi_get_bidi_types(unicodestr, len, bidi_types); | |
529 | ||
530 | embedding_levels = av_malloc_array(len, sizeof(*embedding_levels)); | |
531 | if (!embedding_levels) { | |
532 | goto out; | |
533 | } | |
534 | ||
535 | if (!fribidi_get_par_embedding_levels(bidi_types, len, &direction, | |
536 | embedding_levels)) { | |
537 | goto out; | |
538 | } | |
539 | ||
540 | ar_props = av_malloc_array(len, sizeof(*ar_props)); | |
541 | if (!ar_props) { | |
542 | goto out; | |
543 | } | |
544 | ||
545 | fribidi_get_joining_types(unicodestr, len, ar_props); | |
546 | fribidi_join_arabic(bidi_types, len, embedding_levels, ar_props); | |
547 | fribidi_shape(flags, embedding_levels, len, ar_props, unicodestr); | |
548 | ||
549 | for (line_end = 0, line_start = 0; line_end < len; line_end++) { | |
550 | if (is_newline(unicodestr[line_end]) || line_end == len - 1) { | |
551 | if (!fribidi_reorder_line(flags, bidi_types, | |
552 | line_end - line_start + 1, line_start, | |
553 | direction, embedding_levels, unicodestr, | |
554 | NULL)) { | |
555 | goto out; | |
556 | } | |
557 | line_start = line_end + 1; | |
558 | } | |
559 | } | |
560 | ||
561 | /* Remove zero-width fill chars put in by libfribidi */ | |
562 | for (i = 0, j = 0; i < len; i++) | |
563 | if (unicodestr[i] != FRIBIDI_CHAR_FILL) | |
564 | unicodestr[j++] = unicodestr[i]; | |
565 | len = j; | |
566 | ||
567 | if (!(tmp = av_realloc(s->text, (len * 4 + 1) * sizeof(*s->text)))) { | |
568 | /* Use len * 4, as a unicode character can be up to 4 bytes in UTF-8 */ | |
569 | goto out; | |
570 | } | |
571 | ||
572 | s->text = tmp; | |
573 | len = fribidi_unicode_to_charset(FRIBIDI_CHAR_SET_UTF8, | |
574 | unicodestr, len, s->text); | |
575 | ret = 0; | |
576 | ||
577 | out: | |
578 | av_free(unicodestr); | |
579 | av_free(embedding_levels); | |
580 | av_free(ar_props); | |
581 | av_free(bidi_types); | |
582 | return ret; | |
583 | } | |
584 | #endif | |
585 | ||
586 | static av_cold int init(AVFilterContext *ctx) | |
587 | { | |
588 | int err; | |
589 | DrawTextContext *s = ctx->priv; | |
590 | Glyph *glyph; | |
591 | ||
2ba45a60 DM |
592 | if (!s->fontfile && !CONFIG_LIBFONTCONFIG) { |
593 | av_log(ctx, AV_LOG_ERROR, "No font filename provided\n"); | |
594 | return AVERROR(EINVAL); | |
595 | } | |
596 | ||
597 | if (s->textfile) { | |
598 | if (s->text) { | |
599 | av_log(ctx, AV_LOG_ERROR, | |
600 | "Both text and text file provided. Please provide only one\n"); | |
601 | return AVERROR(EINVAL); | |
602 | } | |
603 | if ((err = load_textfile(ctx)) < 0) | |
604 | return err; | |
605 | } | |
606 | ||
607 | #if CONFIG_LIBFRIBIDI | |
608 | if (s->text_shaping) | |
609 | if ((err = shape_text(ctx)) < 0) | |
610 | return err; | |
611 | #endif | |
612 | ||
613 | if (s->reload && !s->textfile) | |
614 | av_log(ctx, AV_LOG_WARNING, "No file to reload\n"); | |
615 | ||
616 | if (s->tc_opt_string) { | |
617 | int ret = av_timecode_init_from_string(&s->tc, s->tc_rate, | |
618 | s->tc_opt_string, ctx); | |
619 | if (ret < 0) | |
620 | return ret; | |
621 | if (s->tc24hmax) | |
622 | s->tc.flags |= AV_TIMECODE_FLAG_24HOURSMAX; | |
623 | if (!s->text) | |
624 | s->text = av_strdup(""); | |
625 | } | |
626 | ||
627 | if (!s->text) { | |
628 | av_log(ctx, AV_LOG_ERROR, | |
629 | "Either text, a valid file or a timecode must be provided\n"); | |
630 | return AVERROR(EINVAL); | |
631 | } | |
632 | ||
633 | if ((err = FT_Init_FreeType(&(s->library)))) { | |
634 | av_log(ctx, AV_LOG_ERROR, | |
635 | "Could not load FreeType: %s\n", FT_ERRMSG(err)); | |
636 | return AVERROR(EINVAL); | |
637 | } | |
638 | ||
639 | err = load_font(ctx); | |
640 | if (err) | |
641 | return err; | |
642 | if (!s->fontsize) | |
643 | s->fontsize = 16; | |
644 | if ((err = FT_Set_Pixel_Sizes(s->face, 0, s->fontsize))) { | |
645 | av_log(ctx, AV_LOG_ERROR, "Could not set font size to %d pixels: %s\n", | |
646 | s->fontsize, FT_ERRMSG(err)); | |
647 | return AVERROR(EINVAL); | |
648 | } | |
649 | ||
650 | if (s->borderw) { | |
651 | if (FT_Stroker_New(s->library, &s->stroker)) { | |
652 | av_log(ctx, AV_LOG_ERROR, "Coult not init FT stroker\n"); | |
653 | return AVERROR_EXTERNAL; | |
654 | } | |
655 | FT_Stroker_Set(s->stroker, s->borderw << 6, FT_STROKER_LINECAP_ROUND, | |
656 | FT_STROKER_LINEJOIN_ROUND, 0); | |
657 | } | |
658 | ||
659 | s->use_kerning = FT_HAS_KERNING(s->face); | |
660 | ||
661 | /* load the fallback glyph with code 0 */ | |
662 | load_glyph(ctx, NULL, 0); | |
663 | ||
664 | /* set the tabsize in pixels */ | |
665 | if ((err = load_glyph(ctx, &glyph, ' ')) < 0) { | |
666 | av_log(ctx, AV_LOG_ERROR, "Could not set tabsize.\n"); | |
667 | return err; | |
668 | } | |
669 | s->tabsize *= glyph->advance; | |
670 | ||
671 | if (s->exp_mode == EXP_STRFTIME && | |
672 | (strchr(s->text, '%') || strchr(s->text, '\\'))) | |
673 | av_log(ctx, AV_LOG_WARNING, "expansion=strftime is deprecated.\n"); | |
674 | ||
675 | av_bprint_init(&s->expanded_text, 0, AV_BPRINT_SIZE_UNLIMITED); | |
676 | av_bprint_init(&s->expanded_fontcolor, 0, AV_BPRINT_SIZE_UNLIMITED); | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | static int query_formats(AVFilterContext *ctx) | |
682 | { | |
683 | ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0)); | |
684 | return 0; | |
685 | } | |
686 | ||
687 | static int glyph_enu_free(void *opaque, void *elem) | |
688 | { | |
689 | Glyph *glyph = elem; | |
690 | ||
691 | FT_Done_Glyph(glyph->glyph); | |
692 | FT_Done_Glyph(glyph->border_glyph); | |
693 | av_free(elem); | |
694 | return 0; | |
695 | } | |
696 | ||
697 | static av_cold void uninit(AVFilterContext *ctx) | |
698 | { | |
699 | DrawTextContext *s = ctx->priv; | |
700 | ||
701 | av_expr_free(s->x_pexpr); | |
702 | av_expr_free(s->y_pexpr); | |
2ba45a60 | 703 | s->x_pexpr = s->y_pexpr = NULL; |
2ba45a60 DM |
704 | av_freep(&s->positions); |
705 | s->nb_positions = 0; | |
706 | ||
707 | ||
708 | av_tree_enumerate(s->glyphs, NULL, NULL, glyph_enu_free); | |
709 | av_tree_destroy(s->glyphs); | |
710 | s->glyphs = NULL; | |
711 | ||
712 | FT_Done_Face(s->face); | |
713 | FT_Stroker_Done(s->stroker); | |
714 | FT_Done_FreeType(s->library); | |
715 | ||
716 | av_bprint_finalize(&s->expanded_text, NULL); | |
717 | av_bprint_finalize(&s->expanded_fontcolor, NULL); | |
718 | } | |
719 | ||
720 | static int config_input(AVFilterLink *inlink) | |
721 | { | |
722 | AVFilterContext *ctx = inlink->dst; | |
723 | DrawTextContext *s = ctx->priv; | |
724 | int ret; | |
725 | ||
726 | ff_draw_init(&s->dc, inlink->format, 0); | |
727 | ff_draw_color(&s->dc, &s->fontcolor, s->fontcolor.rgba); | |
728 | ff_draw_color(&s->dc, &s->shadowcolor, s->shadowcolor.rgba); | |
729 | ff_draw_color(&s->dc, &s->bordercolor, s->bordercolor.rgba); | |
730 | ff_draw_color(&s->dc, &s->boxcolor, s->boxcolor.rgba); | |
731 | ||
732 | s->var_values[VAR_w] = s->var_values[VAR_W] = s->var_values[VAR_MAIN_W] = inlink->w; | |
733 | s->var_values[VAR_h] = s->var_values[VAR_H] = s->var_values[VAR_MAIN_H] = inlink->h; | |
734 | s->var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? av_q2d(inlink->sample_aspect_ratio) : 1; | |
735 | s->var_values[VAR_DAR] = (double)inlink->w / inlink->h * s->var_values[VAR_SAR]; | |
736 | s->var_values[VAR_HSUB] = 1 << s->dc.hsub_max; | |
737 | s->var_values[VAR_VSUB] = 1 << s->dc.vsub_max; | |
738 | s->var_values[VAR_X] = NAN; | |
739 | s->var_values[VAR_Y] = NAN; | |
740 | s->var_values[VAR_T] = NAN; | |
741 | ||
742 | av_lfg_init(&s->prng, av_get_random_seed()); | |
743 | ||
744 | av_expr_free(s->x_pexpr); | |
745 | av_expr_free(s->y_pexpr); | |
2ba45a60 | 746 | s->x_pexpr = s->y_pexpr = NULL; |
2ba45a60 DM |
747 | |
748 | if ((ret = av_expr_parse(&s->x_pexpr, s->x_expr, var_names, | |
749 | NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 || | |
750 | (ret = av_expr_parse(&s->y_pexpr, s->y_expr, var_names, | |
751 | NULL, NULL, fun2_names, fun2, 0, ctx)) < 0) | |
752 | ||
753 | return AVERROR(EINVAL); | |
2ba45a60 DM |
754 | |
755 | return 0; | |
756 | } | |
757 | ||
758 | static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags) | |
759 | { | |
760 | DrawTextContext *s = ctx->priv; | |
761 | ||
762 | if (!strcmp(cmd, "reinit")) { | |
763 | int ret; | |
764 | uninit(ctx); | |
765 | s->reinit = 1; | |
766 | if ((ret = av_set_options_string(ctx, arg, "=", ":")) < 0) | |
767 | return ret; | |
768 | if ((ret = init(ctx)) < 0) | |
769 | return ret; | |
770 | return config_input(ctx->inputs[0]); | |
771 | } | |
772 | ||
773 | return AVERROR(ENOSYS); | |
774 | } | |
775 | ||
776 | static int func_pict_type(AVFilterContext *ctx, AVBPrint *bp, | |
777 | char *fct, unsigned argc, char **argv, int tag) | |
778 | { | |
779 | DrawTextContext *s = ctx->priv; | |
780 | ||
781 | av_bprintf(bp, "%c", av_get_picture_type_char(s->var_values[VAR_PICT_TYPE])); | |
782 | return 0; | |
783 | } | |
784 | ||
785 | static int func_pts(AVFilterContext *ctx, AVBPrint *bp, | |
786 | char *fct, unsigned argc, char **argv, int tag) | |
787 | { | |
788 | DrawTextContext *s = ctx->priv; | |
789 | const char *fmt; | |
790 | double pts = s->var_values[VAR_T]; | |
791 | int ret; | |
792 | ||
793 | fmt = argc >= 1 ? argv[0] : "flt"; | |
794 | if (argc >= 2) { | |
795 | int64_t delta; | |
796 | if ((ret = av_parse_time(&delta, argv[1], 1)) < 0) { | |
797 | av_log(ctx, AV_LOG_ERROR, "Invalid delta '%s'\n", argv[1]); | |
798 | return ret; | |
799 | } | |
800 | pts += (double)delta / AV_TIME_BASE; | |
801 | } | |
802 | if (!strcmp(fmt, "flt")) { | |
803 | av_bprintf(bp, "%.6f", s->var_values[VAR_T]); | |
804 | } else if (!strcmp(fmt, "hms")) { | |
805 | if (isnan(pts)) { | |
806 | av_bprintf(bp, " ??:??:??.???"); | |
807 | } else { | |
808 | int64_t ms = round(pts * 1000); | |
809 | char sign = ' '; | |
810 | if (ms < 0) { | |
811 | sign = '-'; | |
812 | ms = -ms; | |
813 | } | |
814 | av_bprintf(bp, "%c%02d:%02d:%02d.%03d", sign, | |
815 | (int)(ms / (60 * 60 * 1000)), | |
816 | (int)(ms / (60 * 1000)) % 60, | |
817 | (int)(ms / 1000) % 60, | |
818 | (int)ms % 1000); | |
819 | } | |
820 | } else { | |
821 | av_log(ctx, AV_LOG_ERROR, "Invalid format '%s'\n", fmt); | |
822 | return AVERROR(EINVAL); | |
823 | } | |
824 | return 0; | |
825 | } | |
826 | ||
827 | static int func_frame_num(AVFilterContext *ctx, AVBPrint *bp, | |
828 | char *fct, unsigned argc, char **argv, int tag) | |
829 | { | |
830 | DrawTextContext *s = ctx->priv; | |
831 | ||
832 | av_bprintf(bp, "%d", (int)s->var_values[VAR_N]); | |
833 | return 0; | |
834 | } | |
835 | ||
836 | static int func_metadata(AVFilterContext *ctx, AVBPrint *bp, | |
837 | char *fct, unsigned argc, char **argv, int tag) | |
838 | { | |
839 | DrawTextContext *s = ctx->priv; | |
840 | AVDictionaryEntry *e = av_dict_get(s->metadata, argv[0], NULL, 0); | |
841 | ||
842 | if (e && e->value) | |
843 | av_bprintf(bp, "%s", e->value); | |
844 | return 0; | |
845 | } | |
846 | ||
2ba45a60 DM |
847 | static int func_strftime(AVFilterContext *ctx, AVBPrint *bp, |
848 | char *fct, unsigned argc, char **argv, int tag) | |
849 | { | |
850 | const char *fmt = argc ? argv[0] : "%Y-%m-%d %H:%M:%S"; | |
851 | time_t now; | |
852 | struct tm tm; | |
853 | ||
854 | time(&now); | |
855 | if (tag == 'L') | |
856 | localtime_r(&now, &tm); | |
857 | else | |
f6fa7814 | 858 | tm = *gmtime_r(&now, &tm); |
2ba45a60 DM |
859 | av_bprint_strftime(bp, fmt, &tm); |
860 | return 0; | |
861 | } | |
862 | ||
863 | static int func_eval_expr(AVFilterContext *ctx, AVBPrint *bp, | |
864 | char *fct, unsigned argc, char **argv, int tag) | |
865 | { | |
866 | DrawTextContext *s = ctx->priv; | |
867 | double res; | |
868 | int ret; | |
869 | ||
870 | ret = av_expr_parse_and_eval(&res, argv[0], var_names, s->var_values, | |
871 | NULL, NULL, fun2_names, fun2, | |
872 | &s->prng, 0, ctx); | |
873 | if (ret < 0) | |
874 | av_log(ctx, AV_LOG_ERROR, | |
875 | "Expression '%s' for the expr text expansion function is not valid\n", | |
876 | argv[0]); | |
877 | else | |
878 | av_bprintf(bp, "%f", res); | |
879 | ||
880 | return ret; | |
881 | } | |
882 | ||
883 | static int func_eval_expr_int_format(AVFilterContext *ctx, AVBPrint *bp, | |
884 | char *fct, unsigned argc, char **argv, int tag) | |
885 | { | |
886 | DrawTextContext *s = ctx->priv; | |
887 | double res; | |
888 | int intval; | |
889 | int ret; | |
890 | unsigned int positions = 0; | |
891 | char fmt_str[30] = "%"; | |
892 | ||
893 | /* | |
894 | * argv[0] expression to be converted to `int` | |
895 | * argv[1] format: 'x', 'X', 'd' or 'u' | |
896 | * argv[2] positions printed (optional) | |
897 | */ | |
898 | ||
899 | ret = av_expr_parse_and_eval(&res, argv[0], var_names, s->var_values, | |
900 | NULL, NULL, fun2_names, fun2, | |
901 | &s->prng, 0, ctx); | |
902 | if (ret < 0) { | |
903 | av_log(ctx, AV_LOG_ERROR, | |
904 | "Expression '%s' for the expr text expansion function is not valid\n", | |
905 | argv[0]); | |
906 | return ret; | |
907 | } | |
908 | ||
909 | if (!strchr("xXdu", argv[1][0])) { | |
910 | av_log(ctx, AV_LOG_ERROR, "Invalid format '%c' specified," | |
911 | " allowed values: 'x', 'X', 'd', 'u'\n", argv[1][0]); | |
912 | return AVERROR(EINVAL); | |
913 | } | |
914 | ||
915 | if (argc == 3) { | |
916 | ret = sscanf(argv[2], "%u", &positions); | |
917 | if (ret != 1) { | |
918 | av_log(ctx, AV_LOG_ERROR, "expr_int_format(): Invalid number of positions" | |
919 | " to print: '%s'\n", argv[2]); | |
920 | return AVERROR(EINVAL); | |
921 | } | |
922 | } | |
923 | ||
924 | feclearexcept(FE_ALL_EXCEPT); | |
925 | intval = res; | |
926 | if ((ret = fetestexcept(FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW))) { | |
927 | av_log(ctx, AV_LOG_ERROR, "Conversion of floating-point result to int failed. Control register: 0x%08x. Conversion result: %d\n", ret, intval); | |
928 | return AVERROR(EINVAL); | |
929 | } | |
930 | ||
931 | if (argc == 3) | |
932 | av_strlcatf(fmt_str, sizeof(fmt_str), "0%u", positions); | |
933 | av_strlcatf(fmt_str, sizeof(fmt_str), "%c", argv[1][0]); | |
934 | ||
935 | av_log(ctx, AV_LOG_DEBUG, "Formatting value %f (expr '%s') with spec '%s'\n", | |
936 | res, argv[0], fmt_str); | |
937 | ||
938 | av_bprintf(bp, fmt_str, intval); | |
939 | ||
940 | return 0; | |
941 | } | |
942 | ||
943 | static const struct drawtext_function { | |
944 | const char *name; | |
945 | unsigned argc_min, argc_max; | |
946 | int tag; /**< opaque argument to func */ | |
947 | int (*func)(AVFilterContext *, AVBPrint *, char *, unsigned, char **, int); | |
948 | } functions[] = { | |
949 | { "expr", 1, 1, 0, func_eval_expr }, | |
950 | { "e", 1, 1, 0, func_eval_expr }, | |
951 | { "expr_int_format", 2, 3, 0, func_eval_expr_int_format }, | |
952 | { "eif", 2, 3, 0, func_eval_expr_int_format }, | |
953 | { "pict_type", 0, 0, 0, func_pict_type }, | |
954 | { "pts", 0, 2, 0, func_pts }, | |
955 | { "gmtime", 0, 1, 'G', func_strftime }, | |
956 | { "localtime", 0, 1, 'L', func_strftime }, | |
957 | { "frame_num", 0, 0, 0, func_frame_num }, | |
958 | { "n", 0, 0, 0, func_frame_num }, | |
959 | { "metadata", 1, 1, 0, func_metadata }, | |
960 | }; | |
961 | ||
962 | static int eval_function(AVFilterContext *ctx, AVBPrint *bp, char *fct, | |
963 | unsigned argc, char **argv) | |
964 | { | |
965 | unsigned i; | |
966 | ||
967 | for (i = 0; i < FF_ARRAY_ELEMS(functions); i++) { | |
968 | if (strcmp(fct, functions[i].name)) | |
969 | continue; | |
970 | if (argc < functions[i].argc_min) { | |
971 | av_log(ctx, AV_LOG_ERROR, "%%{%s} requires at least %d arguments\n", | |
972 | fct, functions[i].argc_min); | |
973 | return AVERROR(EINVAL); | |
974 | } | |
975 | if (argc > functions[i].argc_max) { | |
976 | av_log(ctx, AV_LOG_ERROR, "%%{%s} requires at most %d arguments\n", | |
977 | fct, functions[i].argc_max); | |
978 | return AVERROR(EINVAL); | |
979 | } | |
980 | break; | |
981 | } | |
982 | if (i >= FF_ARRAY_ELEMS(functions)) { | |
983 | av_log(ctx, AV_LOG_ERROR, "%%{%s} is not known\n", fct); | |
984 | return AVERROR(EINVAL); | |
985 | } | |
986 | return functions[i].func(ctx, bp, fct, argc, argv, functions[i].tag); | |
987 | } | |
988 | ||
989 | static int expand_function(AVFilterContext *ctx, AVBPrint *bp, char **rtext) | |
990 | { | |
991 | const char *text = *rtext; | |
992 | char *argv[16] = { NULL }; | |
993 | unsigned argc = 0, i; | |
994 | int ret; | |
995 | ||
996 | if (*text != '{') { | |
997 | av_log(ctx, AV_LOG_ERROR, "Stray %% near '%s'\n", text); | |
998 | return AVERROR(EINVAL); | |
999 | } | |
1000 | text++; | |
1001 | while (1) { | |
1002 | if (!(argv[argc++] = av_get_token(&text, ":}"))) { | |
1003 | ret = AVERROR(ENOMEM); | |
1004 | goto end; | |
1005 | } | |
1006 | if (!*text) { | |
1007 | av_log(ctx, AV_LOG_ERROR, "Unterminated %%{} near '%s'\n", *rtext); | |
1008 | ret = AVERROR(EINVAL); | |
1009 | goto end; | |
1010 | } | |
1011 | if (argc == FF_ARRAY_ELEMS(argv)) | |
1012 | av_freep(&argv[--argc]); /* error will be caught later */ | |
1013 | if (*text == '}') | |
1014 | break; | |
1015 | text++; | |
1016 | } | |
1017 | ||
1018 | if ((ret = eval_function(ctx, bp, argv[0], argc - 1, argv + 1)) < 0) | |
1019 | goto end; | |
1020 | ret = 0; | |
1021 | *rtext = (char *)text + 1; | |
1022 | ||
1023 | end: | |
1024 | for (i = 0; i < argc; i++) | |
1025 | av_freep(&argv[i]); | |
1026 | return ret; | |
1027 | } | |
1028 | ||
1029 | static int expand_text(AVFilterContext *ctx, char *text, AVBPrint *bp) | |
1030 | { | |
1031 | int ret; | |
1032 | ||
1033 | av_bprint_clear(bp); | |
1034 | while (*text) { | |
1035 | if (*text == '\\' && text[1]) { | |
1036 | av_bprint_chars(bp, text[1], 1); | |
1037 | text += 2; | |
1038 | } else if (*text == '%') { | |
1039 | text++; | |
1040 | if ((ret = expand_function(ctx, bp, &text)) < 0) | |
1041 | return ret; | |
1042 | } else { | |
1043 | av_bprint_chars(bp, *text, 1); | |
1044 | text++; | |
1045 | } | |
1046 | } | |
1047 | if (!av_bprint_is_complete(bp)) | |
1048 | return AVERROR(ENOMEM); | |
1049 | return 0; | |
1050 | } | |
1051 | ||
1052 | static int draw_glyphs(DrawTextContext *s, AVFrame *frame, | |
1053 | int width, int height, | |
1054 | FFDrawColor *color, int x, int y, int borderw) | |
1055 | { | |
1056 | char *text = s->expanded_text.str; | |
1057 | uint32_t code = 0; | |
1058 | int i, x1, y1; | |
1059 | uint8_t *p; | |
1060 | Glyph *glyph = NULL; | |
1061 | ||
1062 | for (i = 0, p = text; *p; i++) { | |
1063 | FT_Bitmap bitmap; | |
1064 | Glyph dummy = { 0 }; | |
1065 | GET_UTF8(code, *p++, continue;); | |
1066 | ||
1067 | /* skip new line chars, just go to new line */ | |
1068 | if (code == '\n' || code == '\r' || code == '\t') | |
1069 | continue; | |
1070 | ||
1071 | dummy.code = code; | |
1072 | glyph = av_tree_find(s->glyphs, &dummy, (void *)glyph_cmp, NULL); | |
1073 | ||
1074 | bitmap = borderw ? glyph->border_bitmap : glyph->bitmap; | |
1075 | ||
1076 | if (glyph->bitmap.pixel_mode != FT_PIXEL_MODE_MONO && | |
1077 | glyph->bitmap.pixel_mode != FT_PIXEL_MODE_GRAY) | |
1078 | return AVERROR(EINVAL); | |
1079 | ||
1080 | x1 = s->positions[i].x+s->x+x - borderw; | |
1081 | y1 = s->positions[i].y+s->y+y - borderw; | |
1082 | ||
1083 | ff_blend_mask(&s->dc, color, | |
1084 | frame->data, frame->linesize, width, height, | |
1085 | bitmap.buffer, bitmap.pitch, | |
1086 | bitmap.width, bitmap.rows, | |
1087 | bitmap.pixel_mode == FT_PIXEL_MODE_MONO ? 0 : 3, | |
1088 | 0, x1, y1); | |
1089 | } | |
1090 | ||
1091 | return 0; | |
1092 | } | |
1093 | ||
1094 | static int draw_text(AVFilterContext *ctx, AVFrame *frame, | |
1095 | int width, int height) | |
1096 | { | |
1097 | DrawTextContext *s = ctx->priv; | |
1098 | AVFilterLink *inlink = ctx->inputs[0]; | |
1099 | ||
1100 | uint32_t code = 0, prev_code = 0; | |
1101 | int x = 0, y = 0, i = 0, ret; | |
1102 | int max_text_line_w = 0, len; | |
1103 | int box_w, box_h; | |
1104 | char *text; | |
1105 | uint8_t *p; | |
1106 | int y_min = 32000, y_max = -32000; | |
1107 | int x_min = 32000, x_max = -32000; | |
1108 | FT_Vector delta; | |
1109 | Glyph *glyph = NULL, *prev_glyph = NULL; | |
1110 | Glyph dummy = { 0 }; | |
1111 | ||
1112 | time_t now = time(0); | |
1113 | struct tm ltime; | |
1114 | AVBPrint *bp = &s->expanded_text; | |
1115 | ||
1116 | av_bprint_clear(bp); | |
1117 | ||
1118 | if(s->basetime != AV_NOPTS_VALUE) | |
1119 | now= frame->pts*av_q2d(ctx->inputs[0]->time_base) + s->basetime/1000000; | |
1120 | ||
1121 | switch (s->exp_mode) { | |
1122 | case EXP_NONE: | |
1123 | av_bprintf(bp, "%s", s->text); | |
1124 | break; | |
1125 | case EXP_NORMAL: | |
1126 | if ((ret = expand_text(ctx, s->text, &s->expanded_text)) < 0) | |
1127 | return ret; | |
1128 | break; | |
1129 | case EXP_STRFTIME: | |
1130 | localtime_r(&now, <ime); | |
1131 | av_bprint_strftime(bp, s->text, <ime); | |
1132 | break; | |
1133 | } | |
1134 | ||
1135 | if (s->tc_opt_string) { | |
1136 | char tcbuf[AV_TIMECODE_STR_SIZE]; | |
1137 | av_timecode_make_string(&s->tc, tcbuf, inlink->frame_count); | |
1138 | av_bprint_clear(bp); | |
1139 | av_bprintf(bp, "%s%s", s->text, tcbuf); | |
1140 | } | |
1141 | ||
1142 | if (!av_bprint_is_complete(bp)) | |
1143 | return AVERROR(ENOMEM); | |
1144 | text = s->expanded_text.str; | |
1145 | if ((len = s->expanded_text.len) > s->nb_positions) { | |
1146 | if (!(s->positions = | |
1147 | av_realloc(s->positions, len*sizeof(*s->positions)))) | |
1148 | return AVERROR(ENOMEM); | |
1149 | s->nb_positions = len; | |
1150 | } | |
1151 | ||
1152 | if (s->fontcolor_expr[0]) { | |
1153 | /* If expression is set, evaluate and replace the static value */ | |
1154 | av_bprint_clear(&s->expanded_fontcolor); | |
1155 | if ((ret = expand_text(ctx, s->fontcolor_expr, &s->expanded_fontcolor)) < 0) | |
1156 | return ret; | |
1157 | if (!av_bprint_is_complete(&s->expanded_fontcolor)) | |
1158 | return AVERROR(ENOMEM); | |
1159 | av_log(s, AV_LOG_DEBUG, "Evaluated fontcolor is '%s'\n", s->expanded_fontcolor.str); | |
1160 | ret = av_parse_color(s->fontcolor.rgba, s->expanded_fontcolor.str, -1, s); | |
1161 | if (ret) | |
1162 | return ret; | |
1163 | ff_draw_color(&s->dc, &s->fontcolor, s->fontcolor.rgba); | |
1164 | } | |
1165 | ||
1166 | x = 0; | |
1167 | y = 0; | |
1168 | ||
1169 | /* load and cache glyphs */ | |
1170 | for (i = 0, p = text; *p; i++) { | |
1171 | GET_UTF8(code, *p++, continue;); | |
1172 | ||
1173 | /* get glyph */ | |
1174 | dummy.code = code; | |
1175 | glyph = av_tree_find(s->glyphs, &dummy, glyph_cmp, NULL); | |
1176 | if (!glyph) { | |
1177 | load_glyph(ctx, &glyph, code); | |
1178 | } | |
1179 | ||
1180 | y_min = FFMIN(glyph->bbox.yMin, y_min); | |
1181 | y_max = FFMAX(glyph->bbox.yMax, y_max); | |
1182 | x_min = FFMIN(glyph->bbox.xMin, x_min); | |
1183 | x_max = FFMAX(glyph->bbox.xMax, x_max); | |
1184 | } | |
1185 | s->max_glyph_h = y_max - y_min; | |
1186 | s->max_glyph_w = x_max - x_min; | |
1187 | ||
1188 | /* compute and save position for each glyph */ | |
1189 | glyph = NULL; | |
1190 | for (i = 0, p = text; *p; i++) { | |
1191 | GET_UTF8(code, *p++, continue;); | |
1192 | ||
1193 | /* skip the \n in the sequence \r\n */ | |
1194 | if (prev_code == '\r' && code == '\n') | |
1195 | continue; | |
1196 | ||
1197 | prev_code = code; | |
1198 | if (is_newline(code)) { | |
1199 | ||
1200 | max_text_line_w = FFMAX(max_text_line_w, x); | |
1201 | y += s->max_glyph_h; | |
1202 | x = 0; | |
1203 | continue; | |
1204 | } | |
1205 | ||
1206 | /* get glyph */ | |
1207 | prev_glyph = glyph; | |
1208 | dummy.code = code; | |
1209 | glyph = av_tree_find(s->glyphs, &dummy, glyph_cmp, NULL); | |
1210 | ||
1211 | /* kerning */ | |
1212 | if (s->use_kerning && prev_glyph && glyph->code) { | |
1213 | FT_Get_Kerning(s->face, prev_glyph->code, glyph->code, | |
1214 | ft_kerning_default, &delta); | |
1215 | x += delta.x >> 6; | |
1216 | } | |
1217 | ||
1218 | /* save position */ | |
1219 | s->positions[i].x = x + glyph->bitmap_left; | |
1220 | s->positions[i].y = y - glyph->bitmap_top + y_max; | |
1221 | if (code == '\t') x = (x / s->tabsize + 1)*s->tabsize; | |
1222 | else x += glyph->advance; | |
1223 | } | |
1224 | ||
1225 | max_text_line_w = FFMAX(x, max_text_line_w); | |
1226 | ||
1227 | s->var_values[VAR_TW] = s->var_values[VAR_TEXT_W] = max_text_line_w; | |
1228 | s->var_values[VAR_TH] = s->var_values[VAR_TEXT_H] = y + s->max_glyph_h; | |
1229 | ||
1230 | s->var_values[VAR_MAX_GLYPH_W] = s->max_glyph_w; | |
1231 | s->var_values[VAR_MAX_GLYPH_H] = s->max_glyph_h; | |
1232 | s->var_values[VAR_MAX_GLYPH_A] = s->var_values[VAR_ASCENT ] = y_max; | |
1233 | s->var_values[VAR_MAX_GLYPH_D] = s->var_values[VAR_DESCENT] = y_min; | |
1234 | ||
1235 | s->var_values[VAR_LINE_H] = s->var_values[VAR_LH] = s->max_glyph_h; | |
1236 | ||
1237 | s->x = s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, &s->prng); | |
1238 | s->y = s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, &s->prng); | |
1239 | s->x = s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, &s->prng); | |
2ba45a60 DM |
1240 | |
1241 | box_w = FFMIN(width - 1 , max_text_line_w); | |
1242 | box_h = FFMIN(height - 1, y + s->max_glyph_h); | |
1243 | ||
1244 | /* draw box */ | |
1245 | if (s->draw_box) | |
1246 | ff_blend_rectangle(&s->dc, &s->boxcolor, | |
1247 | frame->data, frame->linesize, width, height, | |
1248 | s->x, s->y, box_w, box_h); | |
1249 | ||
1250 | if (s->shadowx || s->shadowy) { | |
1251 | if ((ret = draw_glyphs(s, frame, width, height, | |
1252 | &s->shadowcolor, s->shadowx, s->shadowy, 0)) < 0) | |
1253 | return ret; | |
1254 | } | |
1255 | ||
1256 | if (s->borderw) { | |
1257 | if ((ret = draw_glyphs(s, frame, width, height, | |
1258 | &s->bordercolor, 0, 0, s->borderw)) < 0) | |
1259 | return ret; | |
1260 | } | |
1261 | if ((ret = draw_glyphs(s, frame, width, height, | |
1262 | &s->fontcolor, 0, 0, 0)) < 0) | |
1263 | return ret; | |
1264 | ||
1265 | return 0; | |
1266 | } | |
1267 | ||
1268 | static int filter_frame(AVFilterLink *inlink, AVFrame *frame) | |
1269 | { | |
1270 | AVFilterContext *ctx = inlink->dst; | |
1271 | AVFilterLink *outlink = ctx->outputs[0]; | |
1272 | DrawTextContext *s = ctx->priv; | |
1273 | int ret; | |
1274 | ||
1275 | if (s->reload) { | |
1276 | if ((ret = load_textfile(ctx)) < 0) | |
1277 | return ret; | |
1278 | #if CONFIG_LIBFRIBIDI | |
1279 | if (s->text_shaping) | |
1280 | if ((ret = shape_text(ctx)) < 0) | |
1281 | return ret; | |
1282 | #endif | |
1283 | } | |
1284 | ||
1285 | s->var_values[VAR_N] = inlink->frame_count+s->start_number; | |
1286 | s->var_values[VAR_T] = frame->pts == AV_NOPTS_VALUE ? | |
1287 | NAN : frame->pts * av_q2d(inlink->time_base); | |
1288 | ||
1289 | s->var_values[VAR_PICT_TYPE] = frame->pict_type; | |
1290 | s->metadata = av_frame_get_metadata(frame); | |
1291 | ||
1292 | draw_text(ctx, frame, frame->width, frame->height); | |
1293 | ||
1294 | av_log(ctx, AV_LOG_DEBUG, "n:%d t:%f text_w:%d text_h:%d x:%d y:%d\n", | |
1295 | (int)s->var_values[VAR_N], s->var_values[VAR_T], | |
1296 | (int)s->var_values[VAR_TEXT_W], (int)s->var_values[VAR_TEXT_H], | |
1297 | s->x, s->y); | |
1298 | ||
1299 | return ff_filter_frame(outlink, frame); | |
1300 | } | |
1301 | ||
1302 | static const AVFilterPad avfilter_vf_drawtext_inputs[] = { | |
1303 | { | |
1304 | .name = "default", | |
1305 | .type = AVMEDIA_TYPE_VIDEO, | |
1306 | .filter_frame = filter_frame, | |
1307 | .config_props = config_input, | |
1308 | .needs_writable = 1, | |
1309 | }, | |
1310 | { NULL } | |
1311 | }; | |
1312 | ||
1313 | static const AVFilterPad avfilter_vf_drawtext_outputs[] = { | |
1314 | { | |
1315 | .name = "default", | |
1316 | .type = AVMEDIA_TYPE_VIDEO, | |
1317 | }, | |
1318 | { NULL } | |
1319 | }; | |
1320 | ||
1321 | AVFilter ff_vf_drawtext = { | |
1322 | .name = "drawtext", | |
1323 | .description = NULL_IF_CONFIG_SMALL("Draw text on top of video frames using libfreetype library."), | |
1324 | .priv_size = sizeof(DrawTextContext), | |
1325 | .priv_class = &drawtext_class, | |
1326 | .init = init, | |
1327 | .uninit = uninit, | |
1328 | .query_formats = query_formats, | |
1329 | .inputs = avfilter_vf_drawtext_inputs, | |
1330 | .outputs = avfilter_vf_drawtext_outputs, | |
1331 | .process_command = command, | |
2ba45a60 | 1332 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
2ba45a60 | 1333 | }; |