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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / dvbsubdec.c
CommitLineData
2ba45a60
DM		 1/*
2 * DVB subtitle decoding
3 * Copyright (c) 2005 Ian Caulfield
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 "get_bits.h"
24#include "bytestream.h"
25#include "libavutil/colorspace.h"
26#include "libavutil/opt.h"
27
28#define DVBSUB_PAGE_SEGMENT 0x10
29#define DVBSUB_REGION_SEGMENT 0x11
30#define DVBSUB_CLUT_SEGMENT 0x12
31#define DVBSUB_OBJECT_SEGMENT 0x13
32#define DVBSUB_DISPLAYDEFINITION_SEGMENT 0x14
33#define DVBSUB_DISPLAY_SEGMENT 0x80
34
35#define cm (ff_crop_tab + MAX_NEG_CROP)
36
37#ifdef DEBUG
38#if 0
39static void png_save(const char *filename, uint8_t *bitmap, int w, int h,
40 uint32_t *rgba_palette)
41{
42 int x, y, v;
43 FILE *f;
44 char fname[40], fname2[40];
45 char command[1024];
46
47 snprintf(fname, 40, "%s.ppm", filename);
48
49 f = fopen(fname, "w");
50 if (!f) {
51 perror(fname);
52 return;
53 }
54 fprintf(f, "P6\n"
55 "%d %d\n"
56 "%d\n",
57 w, h, 255);
58 for(y = 0; y < h; y++) {
59 for(x = 0; x < w; x++) {
60 v = rgba_palette[bitmap[y * w + x]];
61 putc((v >> 16) & 0xff, f);
62 putc((v >> 8) & 0xff, f);
63 putc((v >> 0) & 0xff, f);
64 }
65 }
66 fclose(f);
67
68
69 snprintf(fname2, 40, "%s-a.pgm", filename);
70
71 f = fopen(fname2, "w");
72 if (!f) {
73 perror(fname2);
74 return;
75 }
76 fprintf(f, "P5\n"
77 "%d %d\n"
78 "%d\n",
79 w, h, 255);
80 for(y = 0; y < h; y++) {
81 for(x = 0; x < w; x++) {
82 v = rgba_palette[bitmap[y * w + x]];
83 putc((v >> 24) & 0xff, f);
84 }
85 }
86 fclose(f);
87
88 snprintf(command, 1024, "pnmtopng -alpha %s %s > %s.png 2> /dev/null", fname2, fname, filename);
89 system(command);
90
91 snprintf(command, 1024, "rm %s %s", fname, fname2);
92 system(command);
93}
94#endif
95
96static void png_save2(const char *filename, uint32_t *bitmap, int w, int h)
97{
98 int x, y, v;
99 FILE *f;
100 char fname[40], fname2[40];
101 char command[1024];
102
103 snprintf(fname, sizeof(fname), "%s.ppm", filename);
104
105 f = fopen(fname, "w");
106 if (!f) {
107 perror(fname);
108 return;
109 }
110 fprintf(f, "P6\n"
111 "%d %d\n"
112 "%d\n",
113 w, h, 255);
114 for(y = 0; y < h; y++) {
115 for(x = 0; x < w; x++) {
116 v = bitmap[y * w + x];
117 putc((v >> 16) & 0xff, f);
118 putc((v >> 8) & 0xff, f);
119 putc((v >> 0) & 0xff, f);
120 }
121 }
122 fclose(f);
123
124
125 snprintf(fname2, sizeof(fname2), "%s-a.pgm", filename);
126
127 f = fopen(fname2, "w");
128 if (!f) {
129 perror(fname2);
130 return;
131 }
132 fprintf(f, "P5\n"
133 "%d %d\n"
134 "%d\n",
135 w, h, 255);
136 for(y = 0; y < h; y++) {
137 for(x = 0; x < w; x++) {
138 v = bitmap[y * w + x];
139 putc((v >> 24) & 0xff, f);
140 }
141 }
142 fclose(f);
143
144 snprintf(command, sizeof(command), "pnmtopng -alpha %s %s > %s.png 2> /dev/null", fname2, fname, filename);
145 system(command);
146
147 snprintf(command, sizeof(command), "rm %s %s", fname, fname2);
148 system(command);
149}
150#endif
151
152#define RGBA(r,g,b,a) (((unsigned)(a) << 24) | ((r) << 16) | ((g) << 8) | (b))
153
154typedef struct DVBSubCLUT {
155 int id;
156 int version;
157
158 uint32_t clut4[4];
159 uint32_t clut16[16];
160 uint32_t clut256[256];
161
162 struct DVBSubCLUT *next;
163} DVBSubCLUT;
164
165static DVBSubCLUT default_clut;
166
167typedef struct DVBSubObjectDisplay {
168 int object_id;
169 int region_id;
170
171 int x_pos;
172 int y_pos;
173
174 int fgcolor;
175 int bgcolor;
176
177 struct DVBSubObjectDisplay *region_list_next;
178 struct DVBSubObjectDisplay *object_list_next;
179} DVBSubObjectDisplay;
180
181typedef struct DVBSubObject {
182 int id;
183 int version;
184
185 int type;
186
187 DVBSubObjectDisplay *display_list;
188
189 struct DVBSubObject *next;
190} DVBSubObject;
191
192typedef struct DVBSubRegionDisplay {
193 int region_id;
194
195 int x_pos;
196 int y_pos;
197
198 struct DVBSubRegionDisplay *next;
199} DVBSubRegionDisplay;
200
201typedef struct DVBSubRegion {
202 int id;
203 int version;
204
205 int width;
206 int height;
207 int depth;
208
209 int clut;
210 int bgcolor;
211
212 uint8_t *pbuf;
213 int buf_size;
214 int dirty;
215
216 DVBSubObjectDisplay *display_list;
217
218 struct DVBSubRegion *next;
219} DVBSubRegion;
220
221typedef struct DVBSubDisplayDefinition {
222 int version;
223
224 int x;
225 int y;
226 int width;
227 int height;
228} DVBSubDisplayDefinition;
229
230typedef struct DVBSubContext {
231 AVClass *class;
232 int composition_id;
233 int ancillary_id;
234
235 int version;
236 int time_out;
237 int compute_edt; /**< if 1 end display time calculated using pts
238 if 0 (Default) calculated using time out */
239 int64_t prev_start;
240 DVBSubRegion *region_list;
241 DVBSubCLUT *clut_list;
242 DVBSubObject *object_list;
243
244 DVBSubRegionDisplay *display_list;
245 DVBSubDisplayDefinition *display_definition;
246} DVBSubContext;
247
248
249static DVBSubObject* get_object(DVBSubContext *ctx, int object_id)
250{
251 DVBSubObject *ptr = ctx->object_list;
252
253 while (ptr && ptr->id != object_id) {
254 ptr = ptr->next;
255 }
256
257 return ptr;
258}
259
260static DVBSubCLUT* get_clut(DVBSubContext *ctx, int clut_id)
261{
262 DVBSubCLUT *ptr = ctx->clut_list;
263
264 while (ptr && ptr->id != clut_id) {
265 ptr = ptr->next;
266 }
267
268 return ptr;
269}
270
271static DVBSubRegion* get_region(DVBSubContext *ctx, int region_id)
272{
273 DVBSubRegion *ptr = ctx->region_list;
274
275 while (ptr && ptr->id != region_id) {
276 ptr = ptr->next;
277 }
278
279 return ptr;
280}
281
282static void delete_region_display_list(DVBSubContext *ctx, DVBSubRegion *region)
283{
284 DVBSubObject *object, *obj2, **obj2_ptr;
285 DVBSubObjectDisplay *display, *obj_disp, **obj_disp_ptr;
286
287 while (region->display_list) {
288 display = region->display_list;
289
290 object = get_object(ctx, display->object_id);
291
292 if (object) {
293 obj_disp_ptr = &object->display_list;
294 obj_disp = *obj_disp_ptr;
295
296 while (obj_disp && obj_disp != display) {
297 obj_disp_ptr = &obj_disp->object_list_next;
298 obj_disp = *obj_disp_ptr;
299 }
300
301 if (obj_disp) {
302 *obj_disp_ptr = obj_disp->object_list_next;
303
304 if (!object->display_list) {
305 obj2_ptr = &ctx->object_list;
306 obj2 = *obj2_ptr;
307
308 while (obj2 != object) {
309 assert(obj2);
310 obj2_ptr = &obj2->next;
311 obj2 = *obj2_ptr;
312 }
313
314 *obj2_ptr = obj2->next;
315
316 av_free(obj2);
317 }
318 }
319 }
320
321 region->display_list = display->region_list_next;
322
323 av_free(display);
324 }
325
326}
327
328static void delete_cluts(DVBSubContext *ctx)
329{
330 DVBSubCLUT *clut;
331
332 while (ctx->clut_list) {
333 clut = ctx->clut_list;
334
335 ctx->clut_list = clut->next;
336
337 av_free(clut);
338 }
339}
340
341static void delete_objects(DVBSubContext *ctx)
342{
343 DVBSubObject *object;
344
345 while (ctx->object_list) {
346 object = ctx->object_list;
347
348 ctx->object_list = object->next;
349
350 av_free(object);
351 }
352}
353
354static void delete_regions(DVBSubContext *ctx)
355{
356 DVBSubRegion *region;
357
358 while (ctx->region_list) {
359 region = ctx->region_list;
360
361 ctx->region_list = region->next;
362
363 delete_region_display_list(ctx, region);
364
365 av_free(region->pbuf);
366 av_free(region);
367 }
368}
369
370static av_cold int dvbsub_init_decoder(AVCodecContext *avctx)
371{
372 int i, r, g, b, a = 0;
373 DVBSubContext *ctx = avctx->priv_data;
374
375 if (!avctx->extradata || (avctx->extradata_size < 4) || ((avctx->extradata_size % 5 != 0) && (avctx->extradata_size != 4))) {
376 av_log(avctx, AV_LOG_WARNING, "Invalid DVB subtitles stream extradata!\n");
377 ctx->composition_id = -1;
378 ctx->ancillary_id = -1;
379 } else {
380 if (avctx->extradata_size > 5) {
381 av_log(avctx, AV_LOG_WARNING, "Decoding first DVB subtitles sub-stream\n");
382 }
383
384 ctx->composition_id = AV_RB16(avctx->extradata);
385 ctx->ancillary_id = AV_RB16(avctx->extradata + 2);
386 }
387
388 ctx->version = -1;
389 ctx->prev_start = AV_NOPTS_VALUE;
390
391 default_clut.id = -1;
392 default_clut.next = NULL;
393
394 default_clut.clut4[0] = RGBA( 0, 0, 0, 0);
395 default_clut.clut4[1] = RGBA(255, 255, 255, 255);
396 default_clut.clut4[2] = RGBA( 0, 0, 0, 255);
397 default_clut.clut4[3] = RGBA(127, 127, 127, 255);
398
399 default_clut.clut16[0] = RGBA( 0, 0, 0, 0);
400 for (i = 1; i < 16; i++) {
401 if (i < 8) {
402 r = (i & 1) ? 255 : 0;
403 g = (i & 2) ? 255 : 0;
404 b = (i & 4) ? 255 : 0;
405 } else {
406 r = (i & 1) ? 127 : 0;
407 g = (i & 2) ? 127 : 0;
408 b = (i & 4) ? 127 : 0;
409 }
410 default_clut.clut16[i] = RGBA(r, g, b, 255);
411 }
412
413 default_clut.clut256[0] = RGBA( 0, 0, 0, 0);
414 for (i = 1; i < 256; i++) {
415 if (i < 8) {
416 r = (i & 1) ? 255 : 0;
417 g = (i & 2) ? 255 : 0;
418 b = (i & 4) ? 255 : 0;
419 a = 63;
420 } else {
421 switch (i & 0x88) {
422 case 0x00:
423 r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0);
424 g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0);
425 b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0);
426 a = 255;
427 break;
428 case 0x08:
429 r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0);
430 g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0);
431 b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0);
432 a = 127;
433 break;
434 case 0x80:
435 r = 127 + ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0);
436 g = 127 + ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0);
437 b = 127 + ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0);
438 a = 255;
439 break;
440 case 0x88:
441 r = ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0);
442 g = ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0);
443 b = ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0);
444 a = 255;
445 break;
446 }
447 }
448 default_clut.clut256[i] = RGBA(r, g, b, a);
449 }
450
451 return 0;
452}
453
454static av_cold int dvbsub_close_decoder(AVCodecContext *avctx)
455{
456 DVBSubContext *ctx = avctx->priv_data;
457 DVBSubRegionDisplay *display;
458
459 delete_regions(ctx);
460
461 delete_objects(ctx);
462
463 delete_cluts(ctx);
464
465 av_freep(&ctx->display_definition);
466
467 while (ctx->display_list) {
468 display = ctx->display_list;
469 ctx->display_list = display->next;
470
471 av_free(display);
472 }
473
474 return 0;
475}
476
477static int dvbsub_read_2bit_string(uint8_t *destbuf, int dbuf_len,
478 const uint8_t **srcbuf, int buf_size,
479 int non_mod, uint8_t *map_table, int x_pos)
480{
481 GetBitContext gb;
482
483 int bits;
484 int run_length;
485 int pixels_read = x_pos;
486
487 init_get_bits(&gb, *srcbuf, buf_size << 3);
488
489 destbuf += x_pos;
490
491 while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) {
492 bits = get_bits(&gb, 2);
493
494 if (bits) {
495 if (non_mod != 1 || bits != 1) {
496 if (map_table)
497 *destbuf++ = map_table[bits];
498 else
499 *destbuf++ = bits;
500 }
501 pixels_read++;
502 } else {
503 bits = get_bits1(&gb);
504 if (bits == 1) {
505 run_length = get_bits(&gb, 3) + 3;
506 bits = get_bits(&gb, 2);
507
508 if (non_mod == 1 && bits == 1)
509 pixels_read += run_length;
510 else {
511 if (map_table)
512 bits = map_table[bits];
513 while (run_length-- > 0 && pixels_read < dbuf_len) {
514 *destbuf++ = bits;
515 pixels_read++;
516 }
517 }
518 } else {
519 bits = get_bits1(&gb);
520 if (bits == 0) {
521 bits = get_bits(&gb, 2);
522 if (bits == 2) {
523 run_length = get_bits(&gb, 4) + 12;
524 bits = get_bits(&gb, 2);
525
526 if (non_mod == 1 && bits == 1)
527 pixels_read += run_length;
528 else {
529 if (map_table)
530 bits = map_table[bits];
531 while (run_length-- > 0 && pixels_read < dbuf_len) {
532 *destbuf++ = bits;
533 pixels_read++;
534 }
535 }
536 } else if (bits == 3) {
537 run_length = get_bits(&gb, 8) + 29;
538 bits = get_bits(&gb, 2);
539
540 if (non_mod == 1 && bits == 1)
541 pixels_read += run_length;
542 else {
543 if (map_table)
544 bits = map_table[bits];
545 while (run_length-- > 0 && pixels_read < dbuf_len) {
546 *destbuf++ = bits;
547 pixels_read++;
548 }
549 }
550 } else if (bits == 1) {
551 if (map_table)
552 bits = map_table[0];
553 else
554 bits = 0;
555 run_length = 2;
556 while (run_length-- > 0 && pixels_read < dbuf_len) {
557 *destbuf++ = bits;
558 pixels_read++;
559 }
560 } else {
561 (*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
562 return pixels_read;
563 }
564 } else {
565 if (map_table)
566 bits = map_table[0];
567 else
568 bits = 0;
569 *destbuf++ = bits;
570 pixels_read++;
571 }
572 }
573 }
574 }
575
576 if (get_bits(&gb, 6))
577 av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n");
578
579 (*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
580
581 return pixels_read;
582}
583
584static int dvbsub_read_4bit_string(uint8_t *destbuf, int dbuf_len,
585 const uint8_t **srcbuf, int buf_size,
586 int non_mod, uint8_t *map_table, int x_pos)
587{
588 GetBitContext gb;
589
590 int bits;
591 int run_length;
592 int pixels_read = x_pos;
593
594 init_get_bits(&gb, *srcbuf, buf_size << 3);
595
596 destbuf += x_pos;
597
598 while (get_bits_count(&gb) < buf_size << 3 && pixels_read < dbuf_len) {
599 bits = get_bits(&gb, 4);
600
601 if (bits) {
602 if (non_mod != 1 || bits != 1) {
603 if (map_table)
604 *destbuf++ = map_table[bits];
605 else
606 *destbuf++ = bits;
607 }
608 pixels_read++;
609 } else {
610 bits = get_bits1(&gb);
611 if (bits == 0) {
612 run_length = get_bits(&gb, 3);
613
614 if (run_length == 0) {
615 (*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
616 return pixels_read;
617 }
618
619 run_length += 2;
620
621 if (map_table)
622 bits = map_table[0];
623 else
624 bits = 0;
625
626 while (run_length-- > 0 && pixels_read < dbuf_len) {
627 *destbuf++ = bits;
628 pixels_read++;
629 }
630 } else {
631 bits = get_bits1(&gb);
632 if (bits == 0) {
633 run_length = get_bits(&gb, 2) + 4;
634 bits = get_bits(&gb, 4);
635
636 if (non_mod == 1 && bits == 1)
637 pixels_read += run_length;
638 else {
639 if (map_table)
640 bits = map_table[bits];
641 while (run_length-- > 0 && pixels_read < dbuf_len) {
642 *destbuf++ = bits;
643 pixels_read++;
644 }
645 }
646 } else {
647 bits = get_bits(&gb, 2);
648 if (bits == 2) {
649 run_length = get_bits(&gb, 4) + 9;
650 bits = get_bits(&gb, 4);
651
652 if (non_mod == 1 && bits == 1)
653 pixels_read += run_length;
654 else {
655 if (map_table)
656 bits = map_table[bits];
657 while (run_length-- > 0 && pixels_read < dbuf_len) {
658 *destbuf++ = bits;
659 pixels_read++;
660 }
661 }
662 } else if (bits == 3) {
663 run_length = get_bits(&gb, 8) + 25;
664 bits = get_bits(&gb, 4);
665
666 if (non_mod == 1 && bits == 1)
667 pixels_read += run_length;
668 else {
669 if (map_table)
670 bits = map_table[bits];
671 while (run_length-- > 0 && pixels_read < dbuf_len) {
672 *destbuf++ = bits;
673 pixels_read++;
674 }
675 }
676 } else if (bits == 1) {
677 if (map_table)
678 bits = map_table[0];
679 else
680 bits = 0;
681 run_length = 2;
682 while (run_length-- > 0 && pixels_read < dbuf_len) {
683 *destbuf++ = bits;
684 pixels_read++;
685 }
686 } else {
687 if (map_table)
688 bits = map_table[0];
689 else
690 bits = 0;
691 *destbuf++ = bits;
692 pixels_read ++;
693 }
694 }
695 }
696 }
697 }
698
699 if (get_bits(&gb, 8))
700 av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n");
701
702 (*srcbuf) += (get_bits_count(&gb) + 7) >> 3;
703
704 return pixels_read;
705}
706
707static int dvbsub_read_8bit_string(uint8_t *destbuf, int dbuf_len,
708 const uint8_t **srcbuf, int buf_size,
709 int non_mod, uint8_t *map_table, int x_pos)
710{
711 const uint8_t *sbuf_end = (*srcbuf) + buf_size;
712 int bits;
713 int run_length;
714 int pixels_read = x_pos;
715
716 destbuf += x_pos;
717
718 while (*srcbuf < sbuf_end && pixels_read < dbuf_len) {
719 bits = *(*srcbuf)++;
720
721 if (bits) {
722 if (non_mod != 1 || bits != 1) {
723 if (map_table)
724 *destbuf++ = map_table[bits];
725 else
726 *destbuf++ = bits;
727 }
728 pixels_read++;
729 } else {
730 bits = *(*srcbuf)++;
731 run_length = bits & 0x7f;
732 if ((bits & 0x80) == 0) {
733 if (run_length == 0) {
734 return pixels_read;
735 }
736
737 if (map_table)
738 bits = map_table[0];
739 else
740 bits = 0;
741 while (run_length-- > 0 && pixels_read < dbuf_len) {
742 *destbuf++ = bits;
743 pixels_read++;
744 }
745 } else {
746 bits = *(*srcbuf)++;
747
748 if (non_mod == 1 && bits == 1)
749 pixels_read += run_length;
750 if (map_table)
751 bits = map_table[bits];
752 else while (run_length-- > 0 && pixels_read < dbuf_len) {
753 *destbuf++ = bits;
754 pixels_read++;
755 }
756 }
757 }
758 }
759
760 if (*(*srcbuf)++)
761 av_log(0, AV_LOG_ERROR, "DVBSub error: line overflow\n");
762
763 return pixels_read;
764}
765
766static void save_subtitle_set(AVCodecContext *avctx, AVSubtitle *sub, int *got_output)
767{
768 DVBSubContext *ctx = avctx->priv_data;
769 DVBSubRegionDisplay *display;
770 DVBSubDisplayDefinition *display_def = ctx->display_definition;
771 DVBSubRegion *region;
772 AVSubtitleRect *rect;
773 DVBSubCLUT *clut;
774 uint32_t *clut_table;
775 int i;
776 int offset_x=0, offset_y=0;
777
778
779 if (display_def) {
780 offset_x = display_def->x;
781 offset_y = display_def->y;
782 }
783
784 /* Not touching AVSubtitles again*/
785 if(sub->num_rects) {
786 avpriv_request_sample(ctx, "Different Version of Segment asked Twice\n");
787 return;
788 }
789 for (display = ctx->display_list; display; display = display->next) {
790 region = get_region(ctx, display->region_id);
791 if (region && region->dirty)
792 sub->num_rects++;
793 }
794
795 if(ctx->compute_edt == 0) {
796 sub->end_display_time = ctx->time_out * 1000;
797 *got_output = 1;
798 } else if (ctx->prev_start != AV_NOPTS_VALUE) {
799 sub->end_display_time = av_rescale_q((sub->pts - ctx->prev_start ), AV_TIME_BASE_Q, (AVRational){ 1, 1000 }) - 1;
800 *got_output = 1;
801 }
802 if (sub->num_rects > 0) {
803
804 sub->rects = av_mallocz_array(sizeof(*sub->rects), sub->num_rects);
805 for(i=0; i<sub->num_rects; i++)
806 sub->rects[i] = av_mallocz(sizeof(*sub->rects[i]));
807
808 i = 0;
809
810 for (display = ctx->display_list; display; display = display->next) {
811 region = get_region(ctx, display->region_id);
812
813 if (!region)
814 continue;
815
816 if (!region->dirty)
817 continue;
818
819 rect = sub->rects[i];
820 rect->x = display->x_pos + offset_x;
821 rect->y = display->y_pos + offset_y;
822 rect->w = region->width;
823 rect->h = region->height;
824 rect->nb_colors = (1 << region->depth);
825 rect->type = SUBTITLE_BITMAP;
826 rect->pict.linesize[0] = region->width;
827
828 clut = get_clut(ctx, region->clut);
829
830 if (!clut)
831 clut = &default_clut;
832
833 switch (region->depth) {
834 case 2:
835 clut_table = clut->clut4;
836 break;
837 case 8:
838 clut_table = clut->clut256;
839 break;
840 case 4:
841 default:
842 clut_table = clut->clut16;
843 break;
844 }
845
846 rect->pict.data[1] = av_mallocz(AVPALETTE_SIZE);
847 memcpy(rect->pict.data[1], clut_table, (1 << region->depth) * sizeof(uint32_t));
848
849 rect->pict.data[0] = av_malloc(region->buf_size);
850 memcpy(rect->pict.data[0], region->pbuf, region->buf_size);
851
852 i++;
853 }
854 }
855}
856
857static void dvbsub_parse_pixel_data_block(AVCodecContext *avctx, DVBSubObjectDisplay *display,
858 const uint8_t *buf, int buf_size, int top_bottom, int non_mod)
859{
860 DVBSubContext *ctx = avctx->priv_data;
861
862 DVBSubRegion *region = get_region(ctx, display->region_id);
863 const uint8_t *buf_end = buf + buf_size;
864 uint8_t *pbuf;
865 int x_pos, y_pos;
866 int i;
867
868 uint8_t map2to4[] = { 0x0, 0x7, 0x8, 0xf};
869 uint8_t map2to8[] = {0x00, 0x77, 0x88, 0xff};
870 uint8_t map4to8[] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
871 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff};
872 uint8_t *map_table;
873
874#if 0
875 av_dlog(avctx, "DVB pixel block size %d, %s field:\n", buf_size,
876 top_bottom ? "bottom" : "top");
877
878 for (i = 0; i < buf_size; i++) {
879 if (i % 16 == 0)
880 av_dlog(avctx, "0x%8p: ", buf+i);
881
882 av_dlog(avctx, "%02x ", buf[i]);
883 if (i % 16 == 15)
884 av_dlog(avctx, "\n");
885 }
886
887 if (i % 16)
888 av_dlog(avctx, "\n");
889#endif
890
891 if (!region)
892 return;
893
894 pbuf = region->pbuf;
895 region->dirty = 1;
896
897 x_pos = display->x_pos;
898 y_pos = display->y_pos;
899
900 y_pos += top_bottom;
901
902 while (buf < buf_end) {
903 if ((*buf!=0xf0 && x_pos >= region->width) || y_pos >= region->height) {
904 av_log(avctx, AV_LOG_ERROR, "Invalid object location! %d-%d %d-%d %02x\n", x_pos, region->width, y_pos, region->height, *buf);
905 return;
906 }
907
908 switch (*buf++) {
909 case 0x10:
910 if (region->depth == 8)
911 map_table = map2to8;
912 else if (region->depth == 4)
913 map_table = map2to4;
914 else
915 map_table = NULL;
916
917 x_pos = dvbsub_read_2bit_string(pbuf + (y_pos * region->width),
918 region->width, &buf, buf_end - buf,
919 non_mod, map_table, x_pos);
920 break;
921 case 0x11:
922 if (region->depth < 4) {
923 av_log(avctx, AV_LOG_ERROR, "4-bit pixel string in %d-bit region!\n", region->depth);
924 return;
925 }
926
927 if (region->depth == 8)
928 map_table = map4to8;
929 else
930 map_table = NULL;
931
932 x_pos = dvbsub_read_4bit_string(pbuf + (y_pos * region->width),
933 region->width, &buf, buf_end - buf,
934 non_mod, map_table, x_pos);
935 break;
936 case 0x12:
937 if (region->depth < 8) {
938 av_log(avctx, AV_LOG_ERROR, "8-bit pixel string in %d-bit region!\n", region->depth);
939 return;
940 }
941
942 x_pos = dvbsub_read_8bit_string(pbuf + (y_pos * region->width),
943 region->width, &buf, buf_end - buf,
944 non_mod, NULL, x_pos);
945 break;
946
947 case 0x20:
948 map2to4[0] = (*buf) >> 4;
949 map2to4[1] = (*buf++) & 0xf;
950 map2to4[2] = (*buf) >> 4;
951 map2to4[3] = (*buf++) & 0xf;
952 break;
953 case 0x21:
954 for (i = 0; i < 4; i++)
955 map2to8[i] = *buf++;
956 break;
957 case 0x22:
958 for (i = 0; i < 16; i++)
959 map4to8[i] = *buf++;
960 break;
961
962 case 0xf0:
963 x_pos = display->x_pos;
964 y_pos += 2;
965 break;
966 default:
967 av_log(avctx, AV_LOG_INFO, "Unknown/unsupported pixel block 0x%x\n", *(buf-1));
968 }
969 }
970
971}
972
973static void dvbsub_parse_object_segment(AVCodecContext *avctx,
974 const uint8_t *buf, int buf_size)
975{
976 DVBSubContext *ctx = avctx->priv_data;
977
978 const uint8_t *buf_end = buf + buf_size;
979 int object_id;
980 DVBSubObject *object;
981 DVBSubObjectDisplay *display;
982 int top_field_len, bottom_field_len;
983
984 int coding_method, non_modifying_color;
985
986 object_id = AV_RB16(buf);
987 buf += 2;
988
989 object = get_object(ctx, object_id);
990
991 if (!object)
992 return;
993
994 coding_method = ((*buf) >> 2) & 3;
995 non_modifying_color = ((*buf++) >> 1) & 1;
996
997 if (coding_method == 0) {
998 top_field_len = AV_RB16(buf);
999 buf += 2;
1000 bottom_field_len = AV_RB16(buf);
1001 buf += 2;
1002
1003 if (buf + top_field_len + bottom_field_len > buf_end) {
1004 av_log(avctx, AV_LOG_ERROR, "Field data size too large\n");
1005 return;
1006 }
1007
1008 for (display = object->display_list; display; display = display->object_list_next) {
1009 const uint8_t *block = buf;
1010 int bfl = bottom_field_len;
1011
1012 dvbsub_parse_pixel_data_block(avctx, display, block, top_field_len, 0,
1013 non_modifying_color);
1014
1015 if (bottom_field_len > 0)
1016 block = buf + top_field_len;
1017 else
1018 bfl = top_field_len;
1019
1020 dvbsub_parse_pixel_data_block(avctx, display, block, bfl, 1,
1021 non_modifying_color);
1022 }
1023
1024/* } else if (coding_method == 1) {*/
1025
1026 } else {
1027 av_log(avctx, AV_LOG_ERROR, "Unknown object coding %d\n", coding_method);
1028 }
1029
1030}
1031
1032static int dvbsub_parse_clut_segment(AVCodecContext *avctx,
1033 const uint8_t *buf, int buf_size)
1034{
1035 DVBSubContext *ctx = avctx->priv_data;
1036
1037 const uint8_t *buf_end = buf + buf_size;
1038 int i, clut_id;
1039 int version;
1040 DVBSubCLUT *clut;
1041 int entry_id, depth , full_range;
1042 int y, cr, cb, alpha;
1043 int r, g, b, r_add, g_add, b_add;
1044
1045 av_dlog(avctx, "DVB clut packet:\n");
1046
1047 for (i=0; i < buf_size; i++) {
1048 av_dlog(avctx, "%02x ", buf[i]);
1049 if (i % 16 == 15)
1050 av_dlog(avctx, "\n");
1051 }
1052
1053 if (i % 16)
1054 av_dlog(avctx, "\n");
1055
1056 clut_id = *buf++;
1057 version = ((*buf)>>4)&15;
1058 buf += 1;
1059
1060 clut = get_clut(ctx, clut_id);
1061
1062 if (!clut) {
1063 clut = av_malloc(sizeof(DVBSubCLUT));
1064
1065 memcpy(clut, &default_clut, sizeof(DVBSubCLUT));
1066
1067 clut->id = clut_id;
1068 clut->version = -1;
1069
1070 clut->next = ctx->clut_list;
1071 ctx->clut_list = clut;
1072 }
1073
1074 if (clut->version != version) {
1075
1076 clut->version = version;
1077
1078 while (buf + 4 < buf_end) {
1079 entry_id = *buf++;
1080
1081 depth = (*buf) & 0xe0;
1082
1083 if (depth == 0) {
1084 av_log(avctx, AV_LOG_ERROR, "Invalid clut depth 0x%x!\n", *buf);
1085 return 0;
1086 }
1087
1088 full_range = (*buf++) & 1;
1089
1090 if (full_range) {
1091 y = *buf++;
1092 cr = *buf++;
1093 cb = *buf++;
1094 alpha = *buf++;
1095 } else {
1096 y = buf[0] & 0xfc;
1097 cr = (((buf[0] & 3) << 2) | ((buf[1] >> 6) & 3)) << 4;
1098 cb = (buf[1] << 2) & 0xf0;
1099 alpha = (buf[1] << 6) & 0xc0;
1100
1101 buf += 2;
1102 }
1103
1104 if (y == 0)
1105 alpha = 0xff;
1106
1107 YUV_TO_RGB1_CCIR(cb, cr);
1108 YUV_TO_RGB2_CCIR(r, g, b, y);
1109
1110 av_dlog(avctx, "clut %d := (%d,%d,%d,%d)\n", entry_id, r, g, b, alpha);
1111 if (!!(depth & 0x80) + !!(depth & 0x40) + !!(depth & 0x20) > 1) {
1112 av_dlog(avctx, "More than one bit level marked: %x\n", depth);
1113 if (avctx->strict_std_compliance > FF_COMPLIANCE_NORMAL)
1114 return AVERROR_INVALIDDATA;
1115 }
1116
1117 if (depth & 0x80)
1118 clut->clut4[entry_id] = RGBA(r,g,b,255 - alpha);
1119 else if (depth & 0x40)
1120 clut->clut16[entry_id] = RGBA(r,g,b,255 - alpha);
1121 else if (depth & 0x20)
1122 clut->clut256[entry_id] = RGBA(r,g,b,255 - alpha);
1123 }
1124 }
1125 return 0;
1126}
1127
1128
1129static void dvbsub_parse_region_segment(AVCodecContext *avctx,
1130 const uint8_t *buf, int buf_size)
1131{
1132 DVBSubContext *ctx = avctx->priv_data;
1133
1134 const uint8_t *buf_end = buf + buf_size;
1135 int region_id, object_id;
1136 int av_unused version;
1137 DVBSubRegion *region;
1138 DVBSubObject *object;
1139 DVBSubObjectDisplay *display;
1140 int fill;
1141
1142 if (buf_size < 10)
1143 return;
1144
1145 region_id = *buf++;
1146
1147 region = get_region(ctx, region_id);
1148
1149 if (!region) {
1150 region = av_mallocz(sizeof(DVBSubRegion));
1151
1152 region->id = region_id;
1153 region->version = -1;
1154
1155 region->next = ctx->region_list;
1156 ctx->region_list = region;
1157 }
1158
1159 version = ((*buf)>>4) & 15;
1160 fill = ((*buf++) >> 3) & 1;
1161
1162 region->width = AV_RB16(buf);
1163 buf += 2;
1164 region->height = AV_RB16(buf);
1165 buf += 2;
1166
1167 if (region->width * region->height != region->buf_size) {
1168 av_free(region->pbuf);
1169
1170 region->buf_size = region->width * region->height;
1171
1172 region->pbuf = av_malloc(region->buf_size);
1173
1174 fill = 1;
1175 region->dirty = 0;
1176 }
1177
1178 region->depth = 1 << (((*buf++) >> 2) & 7);
1179 if(region->depth<2 || region->depth>8){
1180 av_log(avctx, AV_LOG_ERROR, "region depth %d is invalid\n", region->depth);
1181 region->depth= 4;
1182 }
1183 region->clut = *buf++;
1184
1185 if (region->depth == 8) {
1186 region->bgcolor = *buf++;
1187 buf += 1;
1188 } else {
1189 buf += 1;
1190
1191 if (region->depth == 4)
1192 region->bgcolor = (((*buf++) >> 4) & 15);
1193 else
1194 region->bgcolor = (((*buf++) >> 2) & 3);
1195 }
1196
1197 av_dlog(avctx, "Region %d, (%dx%d)\n", region_id, region->width, region->height);
1198
1199 if (fill) {
1200 memset(region->pbuf, region->bgcolor, region->buf_size);
1201 av_dlog(avctx, "Fill region (%d)\n", region->bgcolor);
1202 }
1203
1204 delete_region_display_list(ctx, region);
1205
1206 while (buf + 5 < buf_end) {
1207 object_id = AV_RB16(buf);
1208 buf += 2;
1209
1210 object = get_object(ctx, object_id);
1211
1212 if (!object) {
1213 object = av_mallocz(sizeof(DVBSubObject));
1214
1215 object->id = object_id;
1216 object->next = ctx->object_list;
1217 ctx->object_list = object;
1218 }
1219
1220 object->type = (*buf) >> 6;
1221
1222 display = av_mallocz(sizeof(DVBSubObjectDisplay));
1223
1224 display->object_id = object_id;
1225 display->region_id = region_id;
1226
1227 display->x_pos = AV_RB16(buf) & 0xfff;
1228 buf += 2;
1229 display->y_pos = AV_RB16(buf) & 0xfff;
1230 buf += 2;
1231
1232 if ((object->type == 1 || object->type == 2) && buf+1 < buf_end) {
1233 display->fgcolor = *buf++;
1234 display->bgcolor = *buf++;
1235 }
1236
1237 display->region_list_next = region->display_list;
1238 region->display_list = display;
1239
1240 display->object_list_next = object->display_list;
1241 object->display_list = display;
1242 }
1243}
1244
1245static void dvbsub_parse_page_segment(AVCodecContext *avctx,
1246 const uint8_t *buf, int buf_size, AVSubtitle *sub, int *got_output)
1247{
1248 DVBSubContext *ctx = avctx->priv_data;
1249 DVBSubRegionDisplay *display;
1250 DVBSubRegionDisplay *tmp_display_list, **tmp_ptr;
1251
1252 const uint8_t *buf_end = buf + buf_size;
1253 int region_id;
1254 int page_state;
1255 int timeout;
1256 int version;
1257
1258 if (buf_size < 1)
1259 return;
1260
1261 timeout = *buf++;
1262 version = ((*buf)>>4) & 15;
1263 page_state = ((*buf++) >> 2) & 3;
1264
1265 if (ctx->version == version) {
1266 return;
1267 }
1268
1269 ctx->time_out = timeout;
1270 ctx->version = version;
1271
1272 av_dlog(avctx, "Page time out %ds, state %d\n", ctx->time_out, page_state);
1273
1274 if(ctx->compute_edt == 1)
1275 save_subtitle_set(avctx, sub, got_output);
1276
1277 if (page_state == 1 || page_state == 2) {
1278 delete_regions(ctx);
1279 delete_objects(ctx);
1280 delete_cluts(ctx);
1281 }
1282
1283 tmp_display_list = ctx->display_list;
1284 ctx->display_list = NULL;
1285
1286 while (buf + 5 < buf_end) {
1287 region_id = *buf++;
1288 buf += 1;
1289
1290 display = tmp_display_list;
1291 tmp_ptr = &tmp_display_list;
1292
1293 while (display && display->region_id != region_id) {
1294 tmp_ptr = &display->next;
1295 display = display->next;
1296 }
1297
1298 if (!display)
1299 display = av_mallocz(sizeof(DVBSubRegionDisplay));
1300
1301 display->region_id = region_id;
1302
1303 display->x_pos = AV_RB16(buf);
1304 buf += 2;
1305 display->y_pos = AV_RB16(buf);
1306 buf += 2;
1307
1308 *tmp_ptr = display->next;
1309
1310 display->next = ctx->display_list;
1311 ctx->display_list = display;
1312
1313 av_dlog(avctx, "Region %d, (%d,%d)\n", region_id, display->x_pos, display->y_pos);
1314 }
1315
1316 while (tmp_display_list) {
1317 display = tmp_display_list;
1318
1319 tmp_display_list = display->next;
1320
1321 av_free(display);
1322 }
1323
1324}
1325
1326
1327#ifdef DEBUG
1328static void save_display_set(DVBSubContext *ctx)
1329{
1330 DVBSubRegion *region;
1331 DVBSubRegionDisplay *display;
1332 DVBSubCLUT *clut;
1333 uint32_t *clut_table;
1334 int x_pos, y_pos, width, height;
1335 int x, y, y_off, x_off;
1336 uint32_t *pbuf;
1337 char filename[32];
1338 static int fileno_index = 0;
1339
1340 x_pos = -1;
1341 y_pos = -1;
1342 width = 0;
1343 height = 0;
1344
1345 for (display = ctx->display_list; display; display = display->next) {
1346 region = get_region(ctx, display->region_id);
1347
1348 if (x_pos == -1) {
1349 x_pos = display->x_pos;
1350 y_pos = display->y_pos;
1351 width = region->width;
1352 height = region->height;
1353 } else {
1354 if (display->x_pos < x_pos) {
1355 width += (x_pos - display->x_pos);
1356 x_pos = display->x_pos;
1357 }
1358
1359 if (display->y_pos < y_pos) {
1360 height += (y_pos - display->y_pos);
1361 y_pos = display->y_pos;
1362 }
1363
1364 if (display->x_pos + region->width > x_pos + width) {
1365 width = display->x_pos + region->width - x_pos;
1366 }
1367
1368 if (display->y_pos + region->height > y_pos + height) {
1369 height = display->y_pos + region->height - y_pos;
1370 }
1371 }
1372 }
1373
1374 if (x_pos >= 0) {
1375
1376 pbuf = av_malloc(width * height * 4);
1377
1378 for (display = ctx->display_list; display; display = display->next) {
1379 region = get_region(ctx, display->region_id);
1380
1381 x_off = display->x_pos - x_pos;
1382 y_off = display->y_pos - y_pos;
1383
1384 clut = get_clut(ctx, region->clut);
1385
1386 if (!clut)
1387 clut = &default_clut;
1388
1389 switch (region->depth) {
1390 case 2:
1391 clut_table = clut->clut4;
1392 break;
1393 case 8:
1394 clut_table = clut->clut256;
1395 break;
1396 case 4:
1397 default:
1398 clut_table = clut->clut16;
1399 break;
1400 }
1401
1402 for (y = 0; y < region->height; y++) {
1403 for (x = 0; x < region->width; x++) {
1404 pbuf[((y + y_off) * width) + x_off + x] =
1405 clut_table[region->pbuf[y * region->width + x]];
1406 }
1407 }
1408
1409 }
1410
1411 snprintf(filename, sizeof(filename), "dvbs.%d", fileno_index);
1412
1413 png_save2(filename, pbuf, width, height);
1414
1415 av_free(pbuf);
1416 }
1417
1418 fileno_index++;
1419}
1420#endif
1421
1422static void dvbsub_parse_display_definition_segment(AVCodecContext *avctx,
1423 const uint8_t *buf,
1424 int buf_size)
1425{
1426 DVBSubContext *ctx = avctx->priv_data;
1427 DVBSubDisplayDefinition *display_def = ctx->display_definition;
1428 int dds_version, info_byte;
1429
1430 if (buf_size < 5)
1431 return;
1432
1433 info_byte = bytestream_get_byte(&buf);
1434 dds_version = info_byte >> 4;
1435 if (display_def && display_def->version == dds_version)
1436 return; // already have this display definition version
1437
1438 if (!display_def) {
1439 display_def = av_mallocz(sizeof(*display_def));
1440 ctx->display_definition = display_def;
1441 }
1442 if (!display_def)
1443 return;
1444
1445 display_def->version = dds_version;
1446 display_def->x = 0;
1447 display_def->y = 0;
1448 display_def->width = bytestream_get_be16(&buf) + 1;
1449 display_def->height = bytestream_get_be16(&buf) + 1;
1450 if (!avctx->width || !avctx->height) {
1451 avctx->width = display_def->width;
1452 avctx->height = display_def->height;
1453 }
1454
1455 if (buf_size < 13)
1456 return;
1457
1458 if (info_byte & 1<<3) { // display_window_flag
1459 display_def->x = bytestream_get_be16(&buf);
1460 display_def->width = bytestream_get_be16(&buf) - display_def->x + 1;
1461 display_def->y = bytestream_get_be16(&buf);
1462 display_def->height = bytestream_get_be16(&buf) - display_def->y + 1;
1463 }
1464}
1465
1466static void dvbsub_display_end_segment(AVCodecContext *avctx, const uint8_t *buf,
1467 int buf_size, AVSubtitle *sub,int *got_output)
1468{
1469 DVBSubContext *ctx = avctx->priv_data;
1470
1471 if(ctx->compute_edt == 0)
1472 save_subtitle_set(avctx, sub, got_output);
1473#ifdef DEBUG
1474 save_display_set(ctx);
1475#endif
1476
1477}
1478
1479static int dvbsub_decode(AVCodecContext *avctx,
1480 void *data, int *data_size,
1481 AVPacket *avpkt)
1482{
1483 const uint8_t *buf = avpkt->data;
1484 int buf_size = avpkt->size;
1485 DVBSubContext *ctx = avctx->priv_data;
1486 AVSubtitle *sub = data;
1487 const uint8_t *p, *p_end;
1488 int segment_type;
1489 int page_id;
1490 int segment_length;
1491 int i;
1492 int ret = 0;
1493 int got_segment = 0;
1494
1495 av_dlog(avctx, "DVB sub packet:\n");
1496
1497 for (i=0; i < buf_size; i++) {
1498 av_dlog(avctx, "%02x ", buf[i]);
1499 if (i % 16 == 15)
1500 av_dlog(avctx, "\n");
1501 }
1502
1503 if (i % 16)
1504 av_dlog(avctx, "\n");
1505
1506 if (buf_size <= 6 || *buf != 0x0f) {
1507 av_dlog(avctx, "incomplete or broken packet");
1508 return -1;
1509 }
1510
1511 p = buf;
1512 p_end = buf + buf_size;
1513
1514 while (p_end - p >= 6 && *p == 0x0f) {
1515 p += 1;
1516 segment_type = *p++;
1517 page_id = AV_RB16(p);
1518 p += 2;
1519 segment_length = AV_RB16(p);
1520 p += 2;
1521
1522 if (avctx->debug & FF_DEBUG_STARTCODE) {
1523 av_log(avctx, AV_LOG_DEBUG, "segment_type:%d page_id:%d segment_length:%d\n", segment_type, page_id, segment_length);
1524 }
1525
1526 if (p_end - p < segment_length) {
1527 av_dlog(avctx, "incomplete or broken packet");
1528 ret = -1;
1529 goto end;
1530 }
1531
1532 if (page_id == ctx->composition_id || page_id == ctx->ancillary_id ||
1533 ctx->composition_id == -1 || ctx->ancillary_id == -1) {
1534 switch (segment_type) {
1535 case DVBSUB_PAGE_SEGMENT:
1536 dvbsub_parse_page_segment(avctx, p, segment_length, sub, data_size);
1537 got_segment |= 1;
1538 break;
1539 case DVBSUB_REGION_SEGMENT:
1540 dvbsub_parse_region_segment(avctx, p, segment_length);
1541 got_segment |= 2;
1542 break;
1543 case DVBSUB_CLUT_SEGMENT:
1544 ret = dvbsub_parse_clut_segment(avctx, p, segment_length);
1545 if (ret < 0) goto end;
1546 got_segment |= 4;
1547 break;
1548 case DVBSUB_OBJECT_SEGMENT:
1549 dvbsub_parse_object_segment(avctx, p, segment_length);
1550 got_segment |= 8;
1551 break;
1552 case DVBSUB_DISPLAYDEFINITION_SEGMENT:
1553 dvbsub_parse_display_definition_segment(avctx, p, segment_length);
1554 break;
1555 case DVBSUB_DISPLAY_SEGMENT:
1556 dvbsub_display_end_segment(avctx, p, segment_length, sub, data_size);
1557 got_segment |= 16;
1558 break;
1559 default:
1560 av_dlog(avctx, "Subtitling segment type 0x%x, page id %d, length %d\n",
1561 segment_type, page_id, segment_length);
1562 break;
1563 }
1564 }
1565
1566 p += segment_length;
1567 }
1568 // Some streams do not send a display segment but if we have all the other
1569 // segments then we need no further data.
1570 if (got_segment == 15) {
1571 av_log(avctx, AV_LOG_DEBUG, "Missing display_end_segment, emulating\n");
1572 dvbsub_display_end_segment(avctx, p, 0, sub, data_size);
1573 }
1574
1575end:
1576 if(ret < 0) {
1577 *data_size = 0;
1578 avsubtitle_free(sub);
1579 return ret;
1580 } else {
1581 if(ctx->compute_edt == 1 )
1582 FFSWAP(int64_t, ctx->prev_start, sub->pts);
1583 }
1584
1585 return p - buf;
1586}
1587
1588#define DS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_SUBTITLE_PARAM
1589static const AVOption options[] = {
1590 {"compute_edt", "compute end of time using pts or timeout", offsetof(DVBSubContext, compute_edt), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DS},
1591 {NULL}
1592};
1593static const AVClass dvbsubdec_class = {
1594 .class_name = "DVB Sub Decoder",
1595 .item_name = av_default_item_name,
1596 .option = options,
1597 .version = LIBAVUTIL_VERSION_INT,
1598};
1599
1600AVCodec ff_dvbsub_decoder = {
1601 .name = "dvbsub",
1602 .long_name = NULL_IF_CONFIG_SMALL("DVB subtitles"),
1603 .type = AVMEDIA_TYPE_SUBTITLE,
1604 .id = AV_CODEC_ID_DVB_SUBTITLE,
1605 .priv_data_size = sizeof(DVBSubContext),
1606 .init = dvbsub_init_decoder,
1607 .close = dvbsub_close_decoder,
1608 .decode = dvbsub_decode,
1609 .priv_class = &dvbsubdec_class,
1610};
ffmpeg Piment Noir Debian package repository