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2ba45a60 DM |
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; | |
f6fa7814 | 47 | ASSFields fields[24]; |
2ba45a60 DM |
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), | |
f6fa7814 DM |
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) }, | |
2ba45a60 DM |
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), | |
f6fa7814 DM |
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) }, | |
2ba45a60 DM |
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), | |
f6fa7814 DM |
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) }, | |
2ba45a60 DM |
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(*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 | ||
f6fa7814 DM |
232 | static int *get_default_field_orders(const ASSSection *section) |
233 | { | |
234 | int i; | |
235 | int *order = av_malloc(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 | while (i < FF_ARRAY_ELEMS(section->fields)) | |
242 | order[i] = -1; | |
243 | return order; | |
244 | } | |
245 | ||
2ba45a60 DM |
246 | static const char *ass_split_section(ASSSplitContext *ctx, const char *buf) |
247 | { | |
248 | const ASSSection *section = &ass_sections[ctx->current_section]; | |
249 | int *number = &ctx->field_number[ctx->current_section]; | |
250 | int *order = ctx->field_order[ctx->current_section]; | |
251 | int *tmp, i, len; | |
252 | ||
253 | while (buf && *buf) { | |
254 | if (buf[0] == '[') { | |
255 | ctx->current_section = -1; | |
256 | break; | |
257 | } | |
258 | if (buf[0] == ';' || (buf[0] == '!' && buf[1] == ':')) { | |
259 | /* skip comments */ | |
260 | } else if (section->format_header && !order) { | |
261 | len = strlen(section->format_header); | |
262 | if (strncmp(buf, section->format_header, len) || buf[len] != ':') | |
f6fa7814 | 263 | goto next_line; |
2ba45a60 DM |
264 | buf += len + 1; |
265 | while (!is_eol(*buf)) { | |
266 | buf = skip_space(buf); | |
267 | len = strcspn(buf, ", \r\n"); | |
268 | if (!(tmp = av_realloc(order, (*number + 1) * sizeof(*order)))) | |
269 | return NULL; | |
270 | order = tmp; | |
271 | order[*number] = -1; | |
272 | for (i=0; section->fields[i].name; i++) | |
273 | if (!strncmp(buf, section->fields[i].name, len)) { | |
274 | order[*number] = i; | |
275 | break; | |
276 | } | |
277 | (*number)++; | |
278 | buf = skip_space(buf + len + (buf[len] == ',')); | |
279 | } | |
280 | ctx->field_order[ctx->current_section] = order; | |
281 | } else if (section->fields_header) { | |
282 | len = strlen(section->fields_header); | |
283 | if (!strncmp(buf, section->fields_header, len) && buf[len] == ':') { | |
284 | uint8_t *ptr, *struct_ptr = realloc_section_array(ctx); | |
285 | if (!struct_ptr) return NULL; | |
f6fa7814 DM |
286 | |
287 | /* No format header line found so far, assume default */ | |
288 | if (!order) { | |
289 | order = get_default_field_orders(section); | |
290 | if (!order) | |
291 | return NULL; | |
292 | ctx->field_order[ctx->current_section] = order; | |
293 | } | |
294 | ||
2ba45a60 DM |
295 | buf += len + 1; |
296 | for (i=0; !is_eol(*buf) && i < *number; i++) { | |
297 | int last = i == *number - 1; | |
298 | buf = skip_space(buf); | |
299 | len = strcspn(buf, last ? "\r\n" : ",\r\n"); | |
300 | if (order[i] >= 0) { | |
301 | ASSFieldType type = section->fields[order[i]].type; | |
302 | ptr = struct_ptr + section->fields[order[i]].offset; | |
303 | convert_func[type](ptr, buf, len); | |
304 | } | |
305 | buf += len; | |
306 | if (!last && *buf) buf++; | |
307 | buf = skip_space(buf); | |
308 | } | |
309 | } | |
310 | } else { | |
311 | len = strcspn(buf, ":\r\n"); | |
312 | if (buf[len] == ':') { | |
313 | for (i=0; section->fields[i].name; i++) | |
314 | if (!strncmp(buf, section->fields[i].name, len)) { | |
315 | ASSFieldType type = section->fields[i].type; | |
316 | uint8_t *ptr = (uint8_t *)&ctx->ass + section->offset; | |
317 | ptr += section->fields[i].offset; | |
318 | buf = skip_space(buf + len + 1); | |
319 | convert_func[type](ptr, buf, strcspn(buf, "\r\n")); | |
320 | break; | |
321 | } | |
322 | } | |
323 | } | |
f6fa7814 | 324 | next_line: |
2ba45a60 DM |
325 | buf += strcspn(buf, "\n"); |
326 | buf += !!*buf; | |
327 | } | |
328 | return buf; | |
329 | } | |
330 | ||
331 | static int ass_split(ASSSplitContext *ctx, const char *buf) | |
332 | { | |
333 | char c, section[16]; | |
334 | int i; | |
335 | ||
336 | if (ctx->current_section >= 0) | |
337 | buf = ass_split_section(ctx, buf); | |
338 | ||
339 | while (buf && *buf) { | |
340 | if (sscanf(buf, "[%15[0-9A-Za-z+ ]]%c", section, &c) == 2) { | |
341 | buf += strcspn(buf, "\n"); | |
342 | buf += !!*buf; | |
343 | for (i=0; i<FF_ARRAY_ELEMS(ass_sections); i++) | |
344 | if (!strcmp(section, ass_sections[i].section)) { | |
345 | ctx->current_section = i; | |
346 | buf = ass_split_section(ctx, buf); | |
347 | } | |
348 | } else { | |
349 | buf += strcspn(buf, "\n"); | |
350 | buf += !!*buf; | |
351 | } | |
352 | } | |
353 | return buf ? 0 : AVERROR_INVALIDDATA; | |
354 | } | |
355 | ||
356 | ASSSplitContext *ff_ass_split(const char *buf) | |
357 | { | |
358 | ASSSplitContext *ctx = av_mallocz(sizeof(*ctx)); | |
359 | ctx->current_section = -1; | |
360 | if (ass_split(ctx, buf) < 0) { | |
361 | ff_ass_split_free(ctx); | |
362 | return NULL; | |
363 | } | |
364 | return ctx; | |
365 | } | |
366 | ||
367 | static void free_section(ASSSplitContext *ctx, const ASSSection *section) | |
368 | { | |
369 | uint8_t *ptr = (uint8_t *)&ctx->ass + section->offset; | |
370 | int i, j, *count, c = 1; | |
371 | ||
372 | if (section->format_header) { | |
373 | ptr = *(void **)ptr; | |
374 | count = (int *)((uint8_t *)&ctx->ass + section->offset_count); | |
375 | } else | |
376 | count = &c; | |
377 | ||
378 | if (ptr) | |
379 | for (i=0; i<*count; i++, ptr += section->size) | |
380 | for (j=0; section->fields[j].name; j++) { | |
381 | const ASSFields *field = §ion->fields[j]; | |
382 | if (field->type == ASS_STR) | |
383 | av_freep(ptr + field->offset); | |
384 | } | |
385 | *count = 0; | |
386 | ||
387 | if (section->format_header) | |
388 | av_freep((uint8_t *)&ctx->ass + section->offset); | |
389 | } | |
390 | ||
391 | ASSDialog *ff_ass_split_dialog(ASSSplitContext *ctx, const char *buf, | |
392 | int cache, int *number) | |
393 | { | |
394 | ASSDialog *dialog = NULL; | |
395 | int i, count; | |
396 | if (!cache) | |
397 | for (i=0; i<FF_ARRAY_ELEMS(ass_sections); i++) | |
398 | if (!strcmp(ass_sections[i].section, "Events")) { | |
399 | free_section(ctx, &ass_sections[i]); | |
400 | break; | |
401 | } | |
402 | count = ctx->ass.dialogs_count; | |
403 | if (ass_split(ctx, buf) == 0) | |
404 | dialog = ctx->ass.dialogs + count; | |
405 | if (number) | |
406 | *number = ctx->ass.dialogs_count - count; | |
407 | return dialog; | |
408 | } | |
409 | ||
410 | void ff_ass_split_free(ASSSplitContext *ctx) | |
411 | { | |
412 | if (ctx) { | |
413 | int i; | |
414 | for (i=0; i<FF_ARRAY_ELEMS(ass_sections); i++) { | |
415 | free_section(ctx, &ass_sections[i]); | |
416 | av_freep(&(ctx->field_order[i])); | |
417 | } | |
418 | av_free(ctx); | |
419 | } | |
420 | } | |
421 | ||
422 | ||
423 | int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv, | |
424 | const char *buf) | |
425 | { | |
426 | const char *text = NULL; | |
427 | char new_line[2]; | |
428 | int text_len = 0; | |
429 | ||
430 | while (buf && *buf) { | |
431 | if (text && callbacks->text && | |
432 | (sscanf(buf, "\\%1[nN]", new_line) == 1 || | |
433 | !strncmp(buf, "{\\", 2))) { | |
434 | callbacks->text(priv, text, text_len); | |
435 | text = NULL; | |
436 | } | |
437 | if (sscanf(buf, "\\%1[nN]", new_line) == 1) { | |
438 | if (callbacks->new_line) | |
439 | callbacks->new_line(priv, new_line[0] == 'N'); | |
440 | buf += 2; | |
441 | } else if (!strncmp(buf, "{\\", 2)) { | |
442 | buf++; | |
443 | while (*buf == '\\') { | |
444 | char style[2], c[2], sep[2], c_num[2] = "0", tmp[128] = {0}; | |
445 | unsigned int color = 0xFFFFFFFF; | |
446 | int len, size = -1, an = -1, alpha = -1; | |
447 | int x1, y1, x2, y2, t1 = -1, t2 = -1; | |
448 | if (sscanf(buf, "\\%1[bisu]%1[01\\}]%n", style, c, &len) > 1) { | |
449 | int close = c[0] == '0' ? 1 : c[0] == '1' ? 0 : -1; | |
450 | len += close != -1; | |
451 | if (callbacks->style) | |
452 | callbacks->style(priv, style[0], close); | |
453 | } else if (sscanf(buf, "\\c%1[\\}]%n", sep, &len) > 0 || | |
454 | sscanf(buf, "\\c&H%X&%1[\\}]%n", &color, sep, &len) > 1 || | |
455 | sscanf(buf, "\\%1[1234]c%1[\\}]%n", c_num, sep, &len) > 1 || | |
456 | sscanf(buf, "\\%1[1234]c&H%X&%1[\\}]%n", c_num, &color, sep, &len) > 2) { | |
457 | if (callbacks->color) | |
458 | callbacks->color(priv, color, c_num[0] - '0'); | |
459 | } else if (sscanf(buf, "\\alpha%1[\\}]%n", sep, &len) > 0 || | |
460 | sscanf(buf, "\\alpha&H%2X&%1[\\}]%n", &alpha, sep, &len) > 1 || | |
461 | sscanf(buf, "\\%1[1234]a%1[\\}]%n", c_num, sep, &len) > 1 || | |
462 | sscanf(buf, "\\%1[1234]a&H%2X&%1[\\}]%n", c_num, &alpha, sep, &len) > 2) { | |
463 | if (callbacks->alpha) | |
464 | callbacks->alpha(priv, alpha, c_num[0] - '0'); | |
465 | } else if (sscanf(buf, "\\fn%1[\\}]%n", sep, &len) > 0 || | |
466 | sscanf(buf, "\\fn%127[^\\}]%1[\\}]%n", tmp, sep, &len) > 1) { | |
467 | if (callbacks->font_name) | |
468 | callbacks->font_name(priv, tmp[0] ? tmp : NULL); | |
469 | } else if (sscanf(buf, "\\fs%1[\\}]%n", sep, &len) > 0 || | |
470 | sscanf(buf, "\\fs%u%1[\\}]%n", &size, sep, &len) > 1) { | |
471 | if (callbacks->font_size) | |
472 | callbacks->font_size(priv, size); | |
473 | } else if (sscanf(buf, "\\a%1[\\}]%n", sep, &len) > 0 || | |
474 | sscanf(buf, "\\a%2u%1[\\}]%n", &an, sep, &len) > 1 || | |
475 | sscanf(buf, "\\an%1[\\}]%n", sep, &len) > 0 || | |
476 | sscanf(buf, "\\an%1u%1[\\}]%n", &an, sep, &len) > 1) { | |
477 | if (an != -1 && buf[2] != 'n') | |
478 | an = (an&3) + (an&4 ? 6 : an&8 ? 3 : 0); | |
479 | if (callbacks->alignment) | |
480 | callbacks->alignment(priv, an); | |
481 | } else if (sscanf(buf, "\\r%1[\\}]%n", sep, &len) > 0 || | |
482 | sscanf(buf, "\\r%127[^\\}]%1[\\}]%n", tmp, sep, &len) > 1) { | |
483 | if (callbacks->cancel_overrides) | |
484 | callbacks->cancel_overrides(priv, tmp); | |
485 | } else if (sscanf(buf, "\\move(%d,%d,%d,%d)%1[\\}]%n", &x1, &y1, &x2, &y2, sep, &len) > 4 || | |
486 | sscanf(buf, "\\move(%d,%d,%d,%d,%d,%d)%1[\\}]%n", &x1, &y1, &x2, &y2, &t1, &t2, sep, &len) > 6) { | |
487 | if (callbacks->move) | |
488 | callbacks->move(priv, x1, y1, x2, y2, t1, t2); | |
489 | } else if (sscanf(buf, "\\pos(%d,%d)%1[\\}]%n", &x1, &y1, sep, &len) > 2) { | |
490 | if (callbacks->move) | |
491 | callbacks->move(priv, x1, y1, x1, y1, -1, -1); | |
492 | } else if (sscanf(buf, "\\org(%d,%d)%1[\\}]%n", &x1, &y1, sep, &len) > 2) { | |
493 | if (callbacks->origin) | |
494 | callbacks->origin(priv, x1, y1); | |
495 | } else { | |
496 | len = strcspn(buf+1, "\\}") + 2; /* skip unknown code */ | |
497 | } | |
498 | buf += len - 1; | |
499 | } | |
500 | if (*buf++ != '}') | |
501 | return AVERROR_INVALIDDATA; | |
502 | } else { | |
503 | if (!text) { | |
504 | text = buf; | |
505 | text_len = 1; | |
506 | } else | |
507 | text_len++; | |
508 | buf++; | |
509 | } | |
510 | } | |
511 | if (text && callbacks->text) | |
512 | callbacks->text(priv, text, text_len); | |
513 | if (callbacks->end) | |
514 | callbacks->end(priv); | |
515 | return 0; | |
516 | } | |
517 | ||
518 | ASSStyle *ff_ass_style_get(ASSSplitContext *ctx, const char *style) | |
519 | { | |
520 | ASS *ass = &ctx->ass; | |
521 | int i; | |
522 | ||
523 | if (!style || !*style) | |
524 | style = "Default"; | |
525 | for (i=0; i<ass->styles_count; i++) | |
526 | if (!strcmp(ass->styles[i].name, style)) | |
527 | return ass->styles + i; | |
528 | return NULL; | |
529 | } |