blob: 872528bdfa6df322e055435b0d0b05321d1cd450
1 | /* |
2 | * SSA/ASS spliting functions |
3 | * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org> |
4 | * |
5 | * This file is part of FFmpeg. |
6 | * |
7 | * FFmpeg is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Lesser General Public |
9 | * License as published by the Free Software Foundation; either |
10 | * version 2.1 of the License, or (at your option) any later version. |
11 | * |
12 | * FFmpeg is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Lesser General Public |
18 | * License along with FFmpeg; if not, write to the Free Software |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | */ |
21 | |
22 | #include "avcodec.h" |
23 | #include "ass_split.h" |
24 | |
25 | typedef enum { |
26 | ASS_STR, |
27 | ASS_INT, |
28 | ASS_FLT, |
29 | ASS_COLOR, |
30 | ASS_TIMESTAMP, |
31 | ASS_ALGN, |
32 | } ASSFieldType; |
33 | |
34 | typedef struct { |
35 | const char *name; |
36 | int type; |
37 | int offset; |
38 | } ASSFields; |
39 | |
40 | typedef struct { |
41 | const char *section; |
42 | const char *format_header; |
43 | const char *fields_header; |
44 | int size; |
45 | int offset; |
46 | int offset_count; |
47 | ASSFields fields[24]; |
48 | } ASSSection; |
49 | |
50 | static const ASSSection ass_sections[] = { |
51 | { .section = "Script Info", |
52 | .offset = offsetof(ASS, script_info), |
53 | .fields = {{"ScriptType", ASS_STR, offsetof(ASSScriptInfo, script_type)}, |
54 | {"Collisions", ASS_STR, offsetof(ASSScriptInfo, collisions) }, |
55 | {"PlayResX", ASS_INT, offsetof(ASSScriptInfo, play_res_x) }, |
56 | {"PlayResY", ASS_INT, offsetof(ASSScriptInfo, play_res_y) }, |
57 | {"Timer", ASS_FLT, offsetof(ASSScriptInfo, timer) }, |
58 | {0}, |
59 | } |
60 | }, |
61 | { .section = "V4+ Styles", |
62 | .format_header = "Format", |
63 | .fields_header = "Style", |
64 | .size = sizeof(ASSStyle), |
65 | .offset = offsetof(ASS, styles), |
66 | .offset_count = offsetof(ASS, styles_count), |
67 | .fields = {{"Name", ASS_STR, offsetof(ASSStyle, name) }, |
68 | {"Fontname", ASS_STR, offsetof(ASSStyle, font_name) }, |
69 | {"Fontsize", ASS_INT, offsetof(ASSStyle, font_size) }, |
70 | {"PrimaryColour", ASS_COLOR, offsetof(ASSStyle, primary_color) }, |
71 | {"SecondaryColour", ASS_COLOR, offsetof(ASSStyle, secondary_color)}, |
72 | {"OutlineColour", ASS_COLOR, offsetof(ASSStyle, outline_color) }, |
73 | {"BackColour", ASS_COLOR, offsetof(ASSStyle, back_color) }, |
74 | {"Bold", ASS_INT, offsetof(ASSStyle, bold) }, |
75 | {"Italic", ASS_INT, offsetof(ASSStyle, italic) }, |
76 | {"Underline", ASS_INT, offsetof(ASSStyle, underline) }, |
77 | {"StrikeOut", ASS_INT, offsetof(ASSStyle, strikeout) }, |
78 | {"ScaleX", ASS_FLT, offsetof(ASSStyle, scalex) }, |
79 | {"ScaleY", ASS_FLT, offsetof(ASSStyle, scaley) }, |
80 | {"Spacing", ASS_FLT, offsetof(ASSStyle, spacing) }, |
81 | {"Angle", ASS_FLT, offsetof(ASSStyle, angle) }, |
82 | {"BorderStyle", ASS_INT, offsetof(ASSStyle, border_style) }, |
83 | {"Outline", ASS_FLT, offsetof(ASSStyle, outline) }, |
84 | {"Shadow", ASS_FLT, offsetof(ASSStyle, shadow) }, |
85 | {"Alignment", ASS_INT, offsetof(ASSStyle, alignment) }, |
86 | {"MarginL", ASS_INT, offsetof(ASSStyle, margin_l) }, |
87 | {"MarginR", ASS_INT, offsetof(ASSStyle, margin_r) }, |
88 | {"MarginV", ASS_INT, offsetof(ASSStyle, margin_v) }, |
89 | {"Encoding", ASS_INT, offsetof(ASSStyle, encoding) }, |
90 | {0}, |
91 | } |
92 | }, |
93 | { .section = "V4 Styles", |
94 | .format_header = "Format", |
95 | .fields_header = "Style", |
96 | .size = sizeof(ASSStyle), |
97 | .offset = offsetof(ASS, styles), |
98 | .offset_count = offsetof(ASS, styles_count), |
99 | .fields = {{"Name", ASS_STR, offsetof(ASSStyle, name) }, |
100 | {"Fontname", ASS_STR, offsetof(ASSStyle, font_name) }, |
101 | {"Fontsize", ASS_INT, offsetof(ASSStyle, font_size) }, |
102 | {"PrimaryColour", ASS_COLOR, offsetof(ASSStyle, primary_color) }, |
103 | {"SecondaryColour", ASS_COLOR, offsetof(ASSStyle, secondary_color)}, |
104 | {"TertiaryColour", ASS_COLOR, offsetof(ASSStyle, outline_color) }, |
105 | {"BackColour", ASS_COLOR, offsetof(ASSStyle, back_color) }, |
106 | {"Bold", ASS_INT, offsetof(ASSStyle, bold) }, |
107 | {"Italic", ASS_INT, offsetof(ASSStyle, italic) }, |
108 | {"BorderStyle", ASS_INT, offsetof(ASSStyle, border_style) }, |
109 | {"Outline", ASS_FLT, offsetof(ASSStyle, outline) }, |
110 | {"Shadow", ASS_FLT, offsetof(ASSStyle, shadow) }, |
111 | {"Alignment", ASS_ALGN, offsetof(ASSStyle, alignment) }, |
112 | {"MarginL", ASS_INT, offsetof(ASSStyle, margin_l) }, |
113 | {"MarginR", ASS_INT, offsetof(ASSStyle, margin_r) }, |
114 | {"MarginV", ASS_INT, offsetof(ASSStyle, margin_v) }, |
115 | {"AlphaLevel", ASS_INT, offsetof(ASSStyle, alpha_level) }, |
116 | {"Encoding", ASS_INT, offsetof(ASSStyle, encoding) }, |
117 | {0}, |
118 | } |
119 | }, |
120 | { .section = "Events", |
121 | .format_header = "Format", |
122 | .fields_header = "Dialogue", |
123 | .size = sizeof(ASSDialog), |
124 | .offset = offsetof(ASS, dialogs), |
125 | .offset_count = offsetof(ASS, dialogs_count), |
126 | .fields = {{"Layer", ASS_INT, offsetof(ASSDialog, layer) }, |
127 | {"Start", ASS_TIMESTAMP, offsetof(ASSDialog, start) }, |
128 | {"End", ASS_TIMESTAMP, offsetof(ASSDialog, end) }, |
129 | {"Style", ASS_STR, offsetof(ASSDialog, style) }, |
130 | {"Name", ASS_STR, offsetof(ASSDialog, name) }, |
131 | {"MarginL", ASS_INT, offsetof(ASSDialog, margin_l)}, |
132 | {"MarginR", ASS_INT, offsetof(ASSDialog, margin_r)}, |
133 | {"MarginV", ASS_INT, offsetof(ASSDialog, margin_v)}, |
134 | {"Effect", ASS_STR, offsetof(ASSDialog, effect) }, |
135 | {"Text", ASS_STR, offsetof(ASSDialog, text) }, |
136 | {0}, |
137 | } |
138 | }, |
139 | }; |
140 | |
141 | |
142 | typedef int (*ASSConvertFunc)(void *dest, const char *buf, int len); |
143 | |
144 | static int convert_str(void *dest, const char *buf, int len) |
145 | { |
146 | char *str = av_malloc(len + 1); |
147 | if (str) { |
148 | memcpy(str, buf, len); |
149 | str[len] = 0; |
150 | if (*(void **)dest) |
151 | av_free(*(void **)dest); |
152 | *(char **)dest = str; |
153 | } |
154 | return !str; |
155 | } |
156 | static int convert_int(void *dest, const char *buf, int len) |
157 | { |
158 | return sscanf(buf, "%d", (int *)dest) == 1; |
159 | } |
160 | static int convert_flt(void *dest, const char *buf, int len) |
161 | { |
162 | return sscanf(buf, "%f", (float *)dest) == 1; |
163 | } |
164 | static int convert_color(void *dest, const char *buf, int len) |
165 | { |
166 | return sscanf(buf, "&H%8x", (int *)dest) == 1 || |
167 | sscanf(buf, "%d", (int *)dest) == 1; |
168 | } |
169 | static int convert_timestamp(void *dest, const char *buf, int len) |
170 | { |
171 | int c, h, m, s, cs; |
172 | if ((c = sscanf(buf, "%d:%02d:%02d.%02d", &h, &m, &s, &cs)) == 4) |
173 | *(int *)dest = 360000*h + 6000*m + 100*s + cs; |
174 | return c == 4; |
175 | } |
176 | static int convert_alignment(void *dest, const char *buf, int len) |
177 | { |
178 | int a; |
179 | if (sscanf(buf, "%d", &a) == 1) { |
180 | /* convert V4 Style alignment to V4+ Style */ |
181 | *(int *)dest = a + ((a&4) >> 1) - 5*!!(a&8); |
182 | return 1; |
183 | } |
184 | return 0; |
185 | } |
186 | |
187 | static const ASSConvertFunc convert_func[] = { |
188 | [ASS_STR] = convert_str, |
189 | [ASS_INT] = convert_int, |
190 | [ASS_FLT] = convert_flt, |
191 | [ASS_COLOR] = convert_color, |
192 | [ASS_TIMESTAMP] = convert_timestamp, |
193 | [ASS_ALGN] = convert_alignment, |
194 | }; |
195 | |
196 | |
197 | struct ASSSplitContext { |
198 | ASS ass; |
199 | int current_section; |
200 | int field_number[FF_ARRAY_ELEMS(ass_sections)]; |
201 | int *field_order[FF_ARRAY_ELEMS(ass_sections)]; |
202 | }; |
203 | |
204 | |
205 | static uint8_t *realloc_section_array(ASSSplitContext *ctx) |
206 | { |
207 | const ASSSection *section = &ass_sections[ctx->current_section]; |
208 | int *count = (int *)((uint8_t *)&ctx->ass + section->offset_count); |
209 | void **section_ptr = (void **)((uint8_t *)&ctx->ass + section->offset); |
210 | uint8_t *tmp = av_realloc_array(*section_ptr, (*count+1), section->size); |
211 | if (!tmp) |
212 | return NULL; |
213 | *section_ptr = tmp; |
214 | tmp += *count * section->size; |
215 | memset(tmp, 0, section->size); |
216 | (*count)++; |
217 | return tmp; |
218 | } |
219 | |
220 | static inline int is_eol(char buf) |
221 | { |
222 | return buf == '\r' || buf == '\n' || buf == 0; |
223 | } |
224 | |
225 | static inline const char *skip_space(const char *buf) |
226 | { |
227 | while (*buf == ' ') |
228 | buf++; |
229 | return buf; |
230 | } |
231 | |
232 | static int *get_default_field_orders(const ASSSection *section, int *number) |
233 | { |
234 | int i; |
235 | int *order = av_malloc_array(FF_ARRAY_ELEMS(section->fields), sizeof(*order)); |
236 | |
237 | if (!order) |
238 | return NULL; |
239 | for (i = 0; section->fields[i].name; i++) |
240 | order[i] = i; |
241 | *number = i; |
242 | while (i < FF_ARRAY_ELEMS(section->fields)) |
243 | order[i++] = -1; |
244 | return order; |
245 | } |
246 | |
247 | static const char *ass_split_section(ASSSplitContext *ctx, const char *buf) |
248 | { |
249 | const ASSSection *section = &ass_sections[ctx->current_section]; |
250 | int *number = &ctx->field_number[ctx->current_section]; |
251 | int *order = ctx->field_order[ctx->current_section]; |
252 | int *tmp, i, len; |
253 | |
254 | while (buf && *buf) { |
255 | if (buf[0] == '[') { |
256 | ctx->current_section = -1; |
257 | break; |
258 | } |
259 | if (buf[0] == ';' || (buf[0] == '!' && buf[1] == ':')) |
260 | goto next_line; // skip comments |
261 | |
262 | len = strcspn(buf, ":\r\n"); |
263 | if (buf[len] == ':' && |
264 | (!section->fields_header || strncmp(buf, section->fields_header, len))) { |
265 | for (i = 0; i < FF_ARRAY_ELEMS(ass_sections); i++) { |
266 | if (ass_sections[i].fields_header && |
267 | !strncmp(buf, ass_sections[i].fields_header, len)) { |
268 | ctx->current_section = i; |
269 | section = &ass_sections[ctx->current_section]; |
270 | number = &ctx->field_number[ctx->current_section]; |
271 | order = ctx->field_order[ctx->current_section]; |
272 | break; |
273 | } |
274 | } |
275 | } |
276 | if (section->format_header && !order) { |
277 | len = strlen(section->format_header); |
278 | if (!strncmp(buf, section->format_header, len) && buf[len] == ':') { |
279 | buf += len + 1; |
280 | while (!is_eol(*buf)) { |
281 | buf = skip_space(buf); |
282 | len = strcspn(buf, ", \r\n"); |
283 | if (!(tmp = av_realloc_array(order, (*number + 1), sizeof(*order)))) |
284 | return NULL; |
285 | order = tmp; |
286 | order[*number] = -1; |
287 | for (i=0; section->fields[i].name; i++) |
288 | if (!strncmp(buf, section->fields[i].name, len)) { |
289 | order[*number] = i; |
290 | break; |
291 | } |
292 | (*number)++; |
293 | buf = skip_space(buf + len + (buf[len] == ',')); |
294 | } |
295 | ctx->field_order[ctx->current_section] = order; |
296 | goto next_line; |
297 | } |
298 | } |
299 | if (section->fields_header) { |
300 | len = strlen(section->fields_header); |
301 | if (!strncmp(buf, section->fields_header, len) && buf[len] == ':') { |
302 | uint8_t *ptr, *struct_ptr = realloc_section_array(ctx); |
303 | if (!struct_ptr) return NULL; |
304 | |
305 | /* No format header line found so far, assume default */ |
306 | if (!order) { |
307 | order = get_default_field_orders(section, number); |
308 | if (!order) |
309 | return NULL; |
310 | ctx->field_order[ctx->current_section] = order; |
311 | } |
312 | |
313 | buf += len + 1; |
314 | for (i=0; !is_eol(*buf) && i < *number; i++) { |
315 | int last = i == *number - 1; |
316 | buf = skip_space(buf); |
317 | len = strcspn(buf, last ? "\r\n" : ",\r\n"); |
318 | if (order[i] >= 0) { |
319 | ASSFieldType type = section->fields[order[i]].type; |
320 | ptr = struct_ptr + section->fields[order[i]].offset; |
321 | convert_func[type](ptr, buf, len); |
322 | } |
323 | buf += len; |
324 | if (!last && *buf) buf++; |
325 | buf = skip_space(buf); |
326 | } |
327 | } |
328 | } else { |
329 | len = strcspn(buf, ":\r\n"); |
330 | if (buf[len] == ':') { |
331 | for (i=0; section->fields[i].name; i++) |
332 | if (!strncmp(buf, section->fields[i].name, len)) { |
333 | ASSFieldType type = section->fields[i].type; |
334 | uint8_t *ptr = (uint8_t *)&ctx->ass + section->offset; |
335 | ptr += section->fields[i].offset; |
336 | buf = skip_space(buf + len + 1); |
337 | convert_func[type](ptr, buf, strcspn(buf, "\r\n")); |
338 | break; |
339 | } |
340 | } |
341 | } |
342 | next_line: |
343 | buf += strcspn(buf, "\n"); |
344 | buf += !!*buf; |
345 | } |
346 | return buf; |
347 | } |
348 | |
349 | static int ass_split(ASSSplitContext *ctx, const char *buf) |
350 | { |
351 | char c, section[16]; |
352 | int i; |
353 | |
354 | if (ctx->current_section >= 0) |
355 | buf = ass_split_section(ctx, buf); |
356 | |
357 | while (buf && *buf) { |
358 | if (sscanf(buf, "[%15[0-9A-Za-z+ ]]%c", section, &c) == 2) { |
359 | buf += strcspn(buf, "\n"); |
360 | buf += !!*buf; |
361 | for (i=0; i<FF_ARRAY_ELEMS(ass_sections); i++) |
362 | if (!strcmp(section, ass_sections[i].section)) { |
363 | ctx->current_section = i; |
364 | buf = ass_split_section(ctx, buf); |
365 | } |
366 | } else { |
367 | buf += strcspn(buf, "\n"); |
368 | buf += !!*buf; |
369 | } |
370 | } |
371 | return buf ? 0 : AVERROR_INVALIDDATA; |
372 | } |
373 | |
374 | ASSSplitContext *ff_ass_split(const char *buf) |
375 | { |
376 | ASSSplitContext *ctx = av_mallocz(sizeof(*ctx)); |
377 | if (!ctx) |
378 | return NULL; |
379 | ctx->current_section = -1; |
380 | if (ass_split(ctx, buf) < 0) { |
381 | ff_ass_split_free(ctx); |
382 | return NULL; |
383 | } |
384 | return ctx; |
385 | } |
386 | |
387 | static void free_section(ASSSplitContext *ctx, const ASSSection *section) |
388 | { |
389 | uint8_t *ptr = (uint8_t *)&ctx->ass + section->offset; |
390 | int i, j, *count, c = 1; |
391 | |
392 | if (section->format_header) { |
393 | ptr = *(void **)ptr; |
394 | count = (int *)((uint8_t *)&ctx->ass + section->offset_count); |
395 | } else |
396 | count = &c; |
397 | |
398 | if (ptr) |
399 | for (i=0; i<*count; i++, ptr += section->size) |
400 | for (j=0; section->fields[j].name; j++) { |
401 | const ASSFields *field = §ion->fields[j]; |
402 | if (field->type == ASS_STR) |
403 | av_freep(ptr + field->offset); |
404 | } |
405 | *count = 0; |
406 | |
407 | if (section->format_header) |
408 | av_freep((uint8_t *)&ctx->ass + section->offset); |
409 | } |
410 | |
411 | ASSDialog *ff_ass_split_dialog(ASSSplitContext *ctx, const char *buf, |
412 | int cache, int *number) |
413 | { |
414 | ASSDialog *dialog = NULL; |
415 | int i, count; |
416 | if (!cache) |
417 | for (i=0; i<FF_ARRAY_ELEMS(ass_sections); i++) |
418 | if (!strcmp(ass_sections[i].section, "Events")) { |
419 | free_section(ctx, &ass_sections[i]); |
420 | break; |
421 | } |
422 | count = ctx->ass.dialogs_count; |
423 | if (ass_split(ctx, buf) == 0) |
424 | dialog = ctx->ass.dialogs + count; |
425 | if (number) |
426 | *number = ctx->ass.dialogs_count - count; |
427 | return dialog; |
428 | } |
429 | |
430 | void ff_ass_free_dialog(ASSDialog **dialogp) |
431 | { |
432 | ASSDialog *dialog = *dialogp; |
433 | if (!dialog) |
434 | return; |
435 | av_freep(&dialog->style); |
436 | av_freep(&dialog->name); |
437 | av_freep(&dialog->effect); |
438 | av_freep(&dialog->text); |
439 | av_freep(dialogp); |
440 | } |
441 | |
442 | ASSDialog *ff_ass_split_dialog2(ASSSplitContext *ctx, const char *buf) |
443 | { |
444 | int i; |
445 | static const ASSFields fields[] = { |
446 | {"ReadOrder", ASS_INT, offsetof(ASSDialog, readorder)}, |
447 | {"Layer", ASS_INT, offsetof(ASSDialog, layer) }, |
448 | {"Style", ASS_STR, offsetof(ASSDialog, style) }, |
449 | {"Name", ASS_STR, offsetof(ASSDialog, name) }, |
450 | {"MarginL", ASS_INT, offsetof(ASSDialog, margin_l) }, |
451 | {"MarginR", ASS_INT, offsetof(ASSDialog, margin_r) }, |
452 | {"MarginV", ASS_INT, offsetof(ASSDialog, margin_v) }, |
453 | {"Effect", ASS_STR, offsetof(ASSDialog, effect) }, |
454 | {"Text", ASS_STR, offsetof(ASSDialog, text) }, |
455 | }; |
456 | |
457 | ASSDialog *dialog = av_mallocz(sizeof(*dialog)); |
458 | if (!dialog) |
459 | return NULL; |
460 | |
461 | for (i = 0; i < FF_ARRAY_ELEMS(fields); i++) { |
462 | size_t len; |
463 | const int last = i == FF_ARRAY_ELEMS(fields) - 1; |
464 | const ASSFieldType type = fields[i].type; |
465 | uint8_t *ptr = (uint8_t *)dialog + fields[i].offset; |
466 | buf = skip_space(buf); |
467 | len = last ? strlen(buf) : strcspn(buf, ","); |
468 | if (len >= INT_MAX) { |
469 | ff_ass_free_dialog(&dialog); |
470 | return NULL; |
471 | } |
472 | convert_func[type](ptr, buf, len); |
473 | buf += len; |
474 | if (*buf) buf++; |
475 | } |
476 | return dialog; |
477 | } |
478 | |
479 | void ff_ass_split_free(ASSSplitContext *ctx) |
480 | { |
481 | if (ctx) { |
482 | int i; |
483 | for (i=0; i<FF_ARRAY_ELEMS(ass_sections); i++) { |
484 | free_section(ctx, &ass_sections[i]); |
485 | av_freep(&(ctx->field_order[i])); |
486 | } |
487 | av_free(ctx); |
488 | } |
489 | } |
490 | |
491 | |
492 | int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv, |
493 | const char *buf) |
494 | { |
495 | const char *text = NULL; |
496 | char new_line[2]; |
497 | int text_len = 0; |
498 | |
499 | while (buf && *buf) { |
500 | if (text && callbacks->text && |
501 | (sscanf(buf, "\\%1[nN]", new_line) == 1 || |
502 | !strncmp(buf, "{\\", 2))) { |
503 | callbacks->text(priv, text, text_len); |
504 | text = NULL; |
505 | } |
506 | if (sscanf(buf, "\\%1[nN]", new_line) == 1) { |
507 | if (callbacks->new_line) |
508 | callbacks->new_line(priv, new_line[0] == 'N'); |
509 | buf += 2; |
510 | } else if (!strncmp(buf, "{\\", 2)) { |
511 | buf++; |
512 | while (*buf == '\\') { |
513 | char style[2], c[2], sep[2], c_num[2] = "0", tmp[128] = {0}; |
514 | unsigned int color = 0xFFFFFFFF; |
515 | int len, size = -1, an = -1, alpha = -1; |
516 | int x1, y1, x2, y2, t1 = -1, t2 = -1; |
517 | if (sscanf(buf, "\\%1[bisu]%1[01\\}]%n", style, c, &len) > 1) { |
518 | int close = c[0] == '0' ? 1 : c[0] == '1' ? 0 : -1; |
519 | len += close != -1; |
520 | if (callbacks->style) |
521 | callbacks->style(priv, style[0], close); |
522 | } else if (sscanf(buf, "\\c%1[\\}]%n", sep, &len) > 0 || |
523 | sscanf(buf, "\\c&H%X&%1[\\}]%n", &color, sep, &len) > 1 || |
524 | sscanf(buf, "\\%1[1234]c%1[\\}]%n", c_num, sep, &len) > 1 || |
525 | sscanf(buf, "\\%1[1234]c&H%X&%1[\\}]%n", c_num, &color, sep, &len) > 2) { |
526 | if (callbacks->color) |
527 | callbacks->color(priv, color, c_num[0] - '0'); |
528 | } else if (sscanf(buf, "\\alpha%1[\\}]%n", sep, &len) > 0 || |
529 | sscanf(buf, "\\alpha&H%2X&%1[\\}]%n", &alpha, sep, &len) > 1 || |
530 | sscanf(buf, "\\%1[1234]a%1[\\}]%n", c_num, sep, &len) > 1 || |
531 | sscanf(buf, "\\%1[1234]a&H%2X&%1[\\}]%n", c_num, &alpha, sep, &len) > 2) { |
532 | if (callbacks->alpha) |
533 | callbacks->alpha(priv, alpha, c_num[0] - '0'); |
534 | } else if (sscanf(buf, "\\fn%1[\\}]%n", sep, &len) > 0 || |
535 | sscanf(buf, "\\fn%127[^\\}]%1[\\}]%n", tmp, sep, &len) > 1) { |
536 | if (callbacks->font_name) |
537 | callbacks->font_name(priv, tmp[0] ? tmp : NULL); |
538 | } else if (sscanf(buf, "\\fs%1[\\}]%n", sep, &len) > 0 || |
539 | sscanf(buf, "\\fs%u%1[\\}]%n", &size, sep, &len) > 1) { |
540 | if (callbacks->font_size) |
541 | callbacks->font_size(priv, size); |
542 | } else if (sscanf(buf, "\\a%1[\\}]%n", sep, &len) > 0 || |
543 | sscanf(buf, "\\a%2u%1[\\}]%n", &an, sep, &len) > 1 || |
544 | sscanf(buf, "\\an%1[\\}]%n", sep, &len) > 0 || |
545 | sscanf(buf, "\\an%1u%1[\\}]%n", &an, sep, &len) > 1) { |
546 | if (an != -1 && buf[2] != 'n') |
547 | an = (an&3) + (an&4 ? 6 : an&8 ? 3 : 0); |
548 | if (callbacks->alignment) |
549 | callbacks->alignment(priv, an); |
550 | } else if (sscanf(buf, "\\r%1[\\}]%n", sep, &len) > 0 || |
551 | sscanf(buf, "\\r%127[^\\}]%1[\\}]%n", tmp, sep, &len) > 1) { |
552 | if (callbacks->cancel_overrides) |
553 | callbacks->cancel_overrides(priv, tmp); |
554 | } else if (sscanf(buf, "\\move(%d,%d,%d,%d)%1[\\}]%n", &x1, &y1, &x2, &y2, sep, &len) > 4 || |
555 | sscanf(buf, "\\move(%d,%d,%d,%d,%d,%d)%1[\\}]%n", &x1, &y1, &x2, &y2, &t1, &t2, sep, &len) > 6) { |
556 | if (callbacks->move) |
557 | callbacks->move(priv, x1, y1, x2, y2, t1, t2); |
558 | } else if (sscanf(buf, "\\pos(%d,%d)%1[\\}]%n", &x1, &y1, sep, &len) > 2) { |
559 | if (callbacks->move) |
560 | callbacks->move(priv, x1, y1, x1, y1, -1, -1); |
561 | } else if (sscanf(buf, "\\org(%d,%d)%1[\\}]%n", &x1, &y1, sep, &len) > 2) { |
562 | if (callbacks->origin) |
563 | callbacks->origin(priv, x1, y1); |
564 | } else { |
565 | len = strcspn(buf+1, "\\}") + 2; /* skip unknown code */ |
566 | } |
567 | buf += len - 1; |
568 | } |
569 | if (*buf++ != '}') |
570 | return AVERROR_INVALIDDATA; |
571 | } else { |
572 | if (!text) { |
573 | text = buf; |
574 | text_len = 1; |
575 | } else |
576 | text_len++; |
577 | buf++; |
578 | } |
579 | } |
580 | if (text && callbacks->text) |
581 | callbacks->text(priv, text, text_len); |
582 | if (callbacks->end) |
583 | callbacks->end(priv); |
584 | return 0; |
585 | } |
586 | |
587 | ASSStyle *ff_ass_style_get(ASSSplitContext *ctx, const char *style) |
588 | { |
589 | ASS *ass = &ctx->ass; |
590 | int i; |
591 | |
592 | if (!style || !*style) |
593 | style = "Default"; |
594 | for (i=0; i<ass->styles_count; i++) |
595 | if (ass->styles[i].name && !strcmp(ass->styles[i].name, style)) |
596 | return ass->styles + i; |
597 | return NULL; |
598 | } |
599 |