sub/vobsub.c

   1 /*
   2  * Some code freely inspired from VobSub <URL:http://vobsub.edensrising.com>,
   3  * with kind permission from Gabest <gabest@freemail.hu>
   4  *
   5  * This file is part of MPlayer.
   6  *
   7  * MPlayer is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * MPlayer 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
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include <ctype.h>
  23 #include <errno.h>
  24 #include <limits.h>
  25 #include <stddef.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <fcntl.h>
  30 #include <unistd.h>
  31 #include <sys/stat.h>
  32 #include <sys/types.h>
  33
  34 #include "config.h"
  35 #include "mpcommon.h"
  36 #include "vobsub.h"
  37 #include "spudec.h"
  38 #include "mp_msg.h"
  39 #include "path.h"
  40 #include "unrar_exec.h"
  41 #include "libavutil/common.h"
  42
  43 extern int vobsub_id;
  44 // Record the original -vobsubid set by commandline, since vobsub_id will be
  45 // overridden if slang match any of vobsub streams.
  46 static int vobsubid = -2;
  47
  48 /**********************************************************************
  49  * RAR stream handling
  50  * The RAR file must have the same basename as the file to open
  51  **********************************************************************/
  52 #ifdef CONFIG_UNRAR_EXEC
  53 typedef struct {
  54     FILE *file;
  55     unsigned char *data;
  56     unsigned long size;
  57     unsigned long pos;
  58 } rar_stream_t;
  59
  60 static rar_stream_t *rar_open(const char *const filename,
  61                               const char *const mode)
  62 {
  63     rar_stream_t *stream;
  64     /* unrar_exec can only read */
  65     if (strcmp("r", mode) && strcmp("rb", mode)) {
  66         errno = EINVAL;
  67         return NULL;
  68     }
  69     stream = malloc(sizeof(rar_stream_t));
  70     if (stream == NULL)
  71         return NULL;
  72     /* first try normal access */
  73     stream->file = fopen(filename, mode);
  74     if (stream->file == NULL) {
  75         char *rar_filename;
  76         const char *p;
  77         int rc;
  78         /* Guess the RAR archive filename */
  79         rar_filename = NULL;
  80         p = strrchr(filename, '.');
  81         if (p) {
  82             ptrdiff_t l = p - filename;
  83             rar_filename = malloc(l + 5);
  84             if (rar_filename == NULL) {
  85                 free(stream);
  86                 return NULL;
  87             }
  88             strncpy(rar_filename, filename, l);
  89             strcpy(rar_filename + l, ".rar");
  90         } else {
  91             rar_filename = malloc(strlen(filename) + 5);
  92             if (rar_filename == NULL) {
  93                 free(stream);
  94                 return NULL;
  95             }
  96             strcpy(rar_filename, filename);
  97             strcat(rar_filename, ".rar");
  98         }
  99         /* get rid of the path if there is any */
 100         p = mp_basename(filename);
 101         rc = unrar_exec_get(&stream->data, &stream->size, p, rar_filename);
 102         if (!rc) {
 103             /* There is no matching filename in the archive. However, sometimes
 104              * the files we are looking for have been given arbitrary names in the archive.
 105              * Let's look for a file with an exact match in the extension only. */
 106             int i, num_files, name_len;
 107             ArchiveList_struct *list, *lp;
 108             num_files = unrar_exec_list(rar_filename, &list);
 109             if (num_files > 0) {
 110                 char *demanded_ext;
 111                 demanded_ext = strrchr (p, '.');
 112                 if (demanded_ext) {
 113                     int demanded_ext_len = strlen (demanded_ext);
 114                     for (i = 0, lp = list; i < num_files; i++, lp = lp->next) {
 115                         name_len = strlen (lp->item.Name);
 116                         if (name_len >= demanded_ext_len && !strcasecmp (lp->item.Name + name_len - demanded_ext_len, demanded_ext)) {
 117                             rc = unrar_exec_get(&stream->data, &stream->size,
 118                                                 lp->item.Name, rar_filename);
 119                             if (rc)
 120                                 break;
 121                         }
 122                     }
 123                 }
 124                 unrar_exec_freelist(list);
 125             }
 126             if (!rc) {
 127                 free(rar_filename);
 128                 free(stream);
 129                 return NULL;
 130             }
 131         }
 132
 133         free(rar_filename);
 134         stream->pos = 0;
 135     }
 136     return stream;
 137 }
 138
 139 static int rar_close(rar_stream_t *stream)
 140 {
 141     if (stream->file)
 142         return fclose(stream->file);
 143     free(stream->data);
 144     return 0;
 145 }
 146
 147 static int rar_eof(rar_stream_t *stream)
 148 {
 149     if (stream->file)
 150         return feof(stream->file);
 151     return stream->pos >= stream->size;
 152 }
 153
 154 static long rar_tell(rar_stream_t *stream)
 155 {
 156     if (stream->file)
 157         return ftell(stream->file);
 158     return stream->pos;
 159 }
 160
 161 static int rar_seek(rar_stream_t *stream, long offset, int whence)
 162 {
 163     if (stream->file)
 164         return fseek(stream->file, offset, whence);
 165     switch (whence) {
 166     case SEEK_SET:
 167         if (offset < 0) {
 168             errno = EINVAL;
 169             return -1;
 170         }
 171         stream->pos = offset;
 172         break;
 173     case SEEK_CUR:
 174         if (offset < 0 && stream->pos < (unsigned long) -offset) {
 175             errno = EINVAL;
 176             return -1;
 177         }
 178         stream->pos += offset;
 179         break;
 180     case SEEK_END:
 181         if (offset < 0 && stream->size < (unsigned long) -offset) {
 182             errno = EINVAL;
 183             return -1;
 184         }
 185         stream->pos = stream->size + offset;
 186         break;
 187     default:
 188         errno = EINVAL;
 189         return -1;
 190     }
 191     return 0;
 192 }
 193
 194 static int rar_getc(rar_stream_t *stream)
 195 {
 196     if (stream->file)
 197         return getc(stream->file);
 198     if (rar_eof(stream))
 199         return EOF;
 200     return stream->data[stream->pos++];
 201 }
 202
 203 static size_t rar_read(void *ptr, size_t size, size_t nmemb,
 204                        rar_stream_t *stream)
 205 {
 206     size_t res;
 207     unsigned long remain;
 208     if (stream->file)
 209         return fread(ptr, size, nmemb, stream->file);
 210     if (rar_eof(stream))
 211         return 0;
 212     res = size * nmemb;
 213     remain = stream->size - stream->pos;
 214     if (res > remain)
 215         res = remain / size * size;
 216     memcpy(ptr, stream->data + stream->pos, res);
 217     stream->pos += res;
 218     res /= size;
 219     return res;
 220 }
 221
 222 #else
 223 typedef FILE rar_stream_t;
 224 #define rar_open        fopen
 225 #define rar_close       fclose
 226 #define rar_eof         feof
 227 #define rar_tell        ftell
 228 #define rar_seek        fseek
 229 #define rar_getc        getc
 230 #define rar_read        fread
 231 #endif
 232
 233 /**********************************************************************/
 234
 235 static ssize_t vobsub_getline(char **lineptr, size_t *n, rar_stream_t *stream)
 236 {
 237     size_t res = 0;
 238     int c;
 239     if (*lineptr == NULL) {
 240         *lineptr = malloc(4096);
 241         if (*lineptr)
 242             *n = 4096;
 243     } else if (*n == 0) {
 244         char *tmp = realloc(*lineptr, 4096);
 245         if (tmp) {
 246             *lineptr = tmp;
 247             *n = 4096;
 248         }
 249     }
 250     if (*lineptr == NULL || *n == 0)
 251         return -1;
 252
 253     for (c = rar_getc(stream); c != EOF; c = rar_getc(stream)) {
 254         if (res + 1 >= *n) {
 255             char *tmp = realloc(*lineptr, *n * 2);
 256             if (tmp == NULL)
 257                 return -1;
 258             *lineptr = tmp;
 259             *n *= 2;
 260         }
 261         (*lineptr)[res++] = c;
 262         if (c == '\n') {
 263             (*lineptr)[res] = 0;
 264             return res;
 265         }
 266     }
 267     if (res == 0)
 268         return -1;
 269     (*lineptr)[res] = 0;
 270     return res;
 271 }
 272
 273 /**********************************************************************
 274  * MPEG parsing
 275  **********************************************************************/
 276
 277 typedef struct {
 278     rar_stream_t *stream;
 279     unsigned int pts;
 280     int aid;
 281     unsigned char *packet;
 282     unsigned int packet_reserve;
 283     unsigned int packet_size;
 284     int padding_was_here;
 285     int merge;
 286 } mpeg_t;
 287
 288 static mpeg_t *mpeg_open(const char *filename)
 289 {
 290     mpeg_t *res = malloc(sizeof(mpeg_t));
 291     int err = res == NULL;
 292     if (!err) {
 293         res->pts            = 0;
 294         res->aid            = -1;
 295         res->packet         = NULL;
 296         res->packet_size    = 0;
 297         res->packet_reserve = 0;
 298         res->padding_was_here = 1;
 299         res->merge          = 0;
 300         res->stream         = rar_open(filename, "rb");
 301         err = res->stream == NULL;
 302         if (err)
 303             perror("fopen Vobsub file failed");
 304         if (err)
 305             free(res);
 306     }
 307     return err ? NULL : res;
 308 }
 309
 310 static void mpeg_free(mpeg_t *mpeg)
 311 {
 312     free(mpeg->packet);
 313     if (mpeg->stream)
 314         rar_close(mpeg->stream);
 315     free(mpeg);
 316 }
 317
 318 static int mpeg_eof(mpeg_t *mpeg)
 319 {
 320     return rar_eof(mpeg->stream);
 321 }
 322
 323 static off_t mpeg_tell(mpeg_t *mpeg)
 324 {
 325     return rar_tell(mpeg->stream);
 326 }
 327
 328 static int mpeg_run(mpeg_t *mpeg)
 329 {
 330     unsigned int len, idx, version;
 331     int c;
 332     /* Goto start of a packet, it starts with 0x000001?? */
 333     const unsigned char wanted[] = { 0, 0, 1 };
 334     unsigned char buf[5];
 335
 336     mpeg->aid = -1;
 337     mpeg->packet_size = 0;
 338     if (rar_read(buf, 4, 1, mpeg->stream) != 1)
 339         return -1;
 340     while (memcmp(buf, wanted, sizeof(wanted)) != 0) {
 341         c = rar_getc(mpeg->stream);
 342         if (c < 0)
 343             return -1;
 344         memmove(buf, buf + 1, 3);
 345         buf[3] = c;
 346     }
 347     switch (buf[3]) {
 348     case 0xb9:                  /* System End Code */
 349         break;
 350     case 0xba:                  /* Packet start code */
 351         c = rar_getc(mpeg->stream);
 352         if (c < 0)
 353             return -1;
 354         if ((c & 0xc0) == 0x40)
 355             version = 4;
 356         else if ((c & 0xf0) == 0x20)
 357             version = 2;
 358         else {
 359             mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: Unsupported MPEG version: 0x%02x\n", c);
 360             return -1;
 361         }
 362         if (version == 4) {
 363             if (rar_seek(mpeg->stream, 9, SEEK_CUR))
 364                 return -1;
 365         } else if (version == 2) {
 366             if (rar_seek(mpeg->stream, 7, SEEK_CUR))
 367                 return -1;
 368         } else
 369             abort();
 370         if (!mpeg->padding_was_here)
 371             mpeg->merge = 1;
 372         break;
 373     case 0xbd:                  /* packet */
 374         if (rar_read(buf, 2, 1, mpeg->stream) != 1)
 375             return -1;
 376         mpeg->padding_was_here = 0;
 377         len = buf[0] << 8 | buf[1];
 378         idx = mpeg_tell(mpeg);
 379         c = rar_getc(mpeg->stream);
 380         if (c < 0)
 381             return -1;
 382         if ((c & 0xC0) == 0x40) { /* skip STD scale & size */
 383             if (rar_getc(mpeg->stream) < 0)
 384                 return -1;
 385             c = rar_getc(mpeg->stream);
 386             if (c < 0)
 387                 return -1;
 388         }
 389         if ((c & 0xf0) == 0x20) { /* System-1 stream timestamp */
 390             /* Do we need this? */
 391             abort();
 392         } else if ((c & 0xf0) == 0x30) {
 393             /* Do we need this? */
 394             abort();
 395         } else if ((c & 0xc0) == 0x80) { /* System-2 (.VOB) stream */
 396             unsigned int pts_flags, hdrlen, dataidx;
 397             c = rar_getc(mpeg->stream);
 398             if (c < 0)
 399                 return -1;
 400             pts_flags = c;
 401             c = rar_getc(mpeg->stream);
 402             if (c < 0)
 403                 return -1;
 404             hdrlen = c;
 405             dataidx = mpeg_tell(mpeg) + hdrlen;
 406             if (dataidx > idx + len) {
 407                 mp_msg(MSGT_VOBSUB, MSGL_ERR, "Invalid header length: %d (total length: %d, idx: %d, dataidx: %d)\n",
 408                        hdrlen, len, idx, dataidx);
 409                 return -1;
 410             }
 411             if ((pts_flags & 0xc0) == 0x80) {
 412                 if (rar_read(buf, 5, 1, mpeg->stream) != 1)
 413                     return -1;
 414                 if (!(((buf[0] & 0xf0) == 0x20) && (buf[0] & 1) && (buf[2] & 1) &&  (buf[4] & 1))) {
 415                     mp_msg(MSGT_VOBSUB, MSGL_ERR, "vobsub PTS error: 0x%02x %02x%02x %02x%02x \n",
 416                            buf[0], buf[1], buf[2], buf[3], buf[4]);
 417                     mpeg->pts = 0;
 418                 } else
 419                     mpeg->pts = ((buf[0] & 0x0e) << 29 | buf[1] << 22 | (buf[2] & 0xfe) << 14
 420                         | buf[3] << 7 | (buf[4] >> 1));
 421             } else /* if ((pts_flags & 0xc0) == 0xc0) */ {
 422                 /* what's this? */
 423                 /* abort(); */
 424             }
 425             rar_seek(mpeg->stream, dataidx, SEEK_SET);
 426             mpeg->aid = rar_getc(mpeg->stream);
 427             if (mpeg->aid < 0) {
 428                 mp_msg(MSGT_VOBSUB, MSGL_ERR, "Bogus aid %d\n", mpeg->aid);
 429                 return -1;
 430             }
 431             mpeg->packet_size = len - ((unsigned int) mpeg_tell(mpeg) - idx);
 432             if (mpeg->packet_reserve < mpeg->packet_size) {
 433                 free(mpeg->packet);
 434                 mpeg->packet = malloc(mpeg->packet_size);
 435                 if (mpeg->packet)
 436                     mpeg->packet_reserve = mpeg->packet_size;
 437             }
 438             if (mpeg->packet == NULL) {
 439                 mp_msg(MSGT_VOBSUB, MSGL_FATAL, "malloc failure");
 440                 mpeg->packet_reserve = 0;
 441                 mpeg->packet_size = 0;
 442                 return -1;
 443             }
 444             if (rar_read(mpeg->packet, mpeg->packet_size, 1, mpeg->stream) != 1) {
 445                 mp_msg(MSGT_VOBSUB, MSGL_ERR, "fread failure");
 446                 mpeg->packet_size = 0;
 447                 return -1;
 448             }
 449             idx = len;
 450         }
 451         break;
 452     case 0xbe:                  /* Padding */
 453         if (rar_read(buf, 2, 1, mpeg->stream) != 1)
 454             return -1;
 455         len = buf[0] << 8 | buf[1];
 456         if (len > 0 && rar_seek(mpeg->stream, len, SEEK_CUR))
 457             return -1;
 458         mpeg->padding_was_here = 1;
 459         break;
 460     default:
 461         if (0xc0 <= buf[3] && buf[3] < 0xf0) {
 462             /* MPEG audio or video */
 463             if (rar_read(buf, 2, 1, mpeg->stream) != 1)
 464                 return -1;
 465             len = buf[0] << 8 | buf[1];
 466             if (len > 0 && rar_seek(mpeg->stream, len, SEEK_CUR))
 467                 return -1;
 468         } else {
 469             mp_msg(MSGT_VOBSUB, MSGL_ERR, "unknown header 0x%02X%02X%02X%02X\n",
 470                    buf[0], buf[1], buf[2], buf[3]);
 471             return -1;
 472         }
 473     }
 474     return 0;
 475 }
 476
 477 /**********************************************************************
 478  * Packet queue
 479  **********************************************************************/
 480
 481 typedef struct {
 482     unsigned int pts100;
 483     off_t filepos;
 484     unsigned int size;
 485     unsigned char *data;
 486 } packet_t;
 487
 488 typedef struct {
 489     char *id;
 490     packet_t *packets;
 491     unsigned int packets_reserve;
 492     unsigned int packets_size;
 493     unsigned int current_index;
 494 } packet_queue_t;
 495
 496 static void packet_construct(packet_t *pkt)
 497 {
 498     pkt->pts100 = 0;
 499     pkt->filepos = 0;
 500     pkt->size = 0;
 501     pkt->data = NULL;
 502 }
 503
 504 static void packet_destroy(packet_t *pkt)
 505 {
 506     free(pkt->data);
 507 }
 508
 509 static void packet_queue_construct(packet_queue_t *queue)
 510 {
 511     queue->id = NULL;
 512     queue->packets = NULL;
 513     queue->packets_reserve = 0;
 514     queue->packets_size = 0;
 515     queue->current_index = 0;
 516 }
 517
 518 static void packet_queue_destroy(packet_queue_t *queue)
 519 {
 520     if (queue->packets) {
 521         while (queue->packets_size--)
 522             packet_destroy(queue->packets + queue->packets_size);
 523         free(queue->packets);
 524     }
 525     return;
 526 }
 527
 528 /* Make sure there is enough room for needed_size packets in the
 529    packet queue. */
 530 static int packet_queue_ensure(packet_queue_t *queue, unsigned int needed_size)
 531 {
 532     if (queue->packets_reserve < needed_size) {
 533         if (queue->packets) {
 534             packet_t *tmp = realloc(queue->packets, 2 * queue->packets_reserve * sizeof(packet_t));
 535             if (tmp == NULL) {
 536                 mp_msg(MSGT_VOBSUB, MSGL_FATAL, "realloc failure");
 537                 return -1;
 538             }
 539             queue->packets = tmp;
 540             queue->packets_reserve *= 2;
 541         } else {
 542             queue->packets = malloc(sizeof(packet_t));
 543             if (queue->packets == NULL) {
 544                 mp_msg(MSGT_VOBSUB, MSGL_FATAL, "malloc failure");
 545                 return -1;
 546             }
 547             queue->packets_reserve = 1;
 548         }
 549     }
 550     return 0;
 551 }
 552
 553 /* add one more packet */
 554 static int packet_queue_grow(packet_queue_t *queue)
 555 {
 556     if (packet_queue_ensure(queue, queue->packets_size + 1) < 0)
 557         return -1;
 558     packet_construct(queue->packets + queue->packets_size);
 559     ++queue->packets_size;
 560     return 0;
 561 }
 562
 563 /* insert a new packet, duplicating pts from the current one */
 564 static int packet_queue_insert(packet_queue_t *queue)
 565 {
 566     packet_t *pkts;
 567     if (packet_queue_ensure(queue, queue->packets_size + 1) < 0)
 568         return -1;
 569     /* XXX packet_size does not reflect the real thing here, it will be updated a bit later */
 570     memmove(queue->packets + queue->current_index + 2,
 571             queue->packets + queue->current_index + 1,
 572             sizeof(packet_t) * (queue->packets_size - queue->current_index - 1));
 573     pkts = queue->packets + queue->current_index;
 574     ++queue->packets_size;
 575     ++queue->current_index;
 576     packet_construct(pkts + 1);
 577     pkts[1].pts100 = pkts[0].pts100;
 578     pkts[1].filepos = pkts[0].filepos;
 579     return 0;
 580 }
 581
 582 /**********************************************************************
 583  * Vobsub
 584  **********************************************************************/
 585
 586 typedef struct {
 587     unsigned int palette[16];
 588     int delay;
 589     unsigned int have_palette;
 590     unsigned int orig_frame_width, orig_frame_height;
 591     unsigned int origin_x, origin_y;
 592     /* index */
 593     packet_queue_t *spu_streams;
 594     unsigned int spu_streams_size;
 595     unsigned int spu_streams_current;
 596     unsigned int spu_valid_streams_size;
 597 } vobsub_t;
 598
 599 /* Make sure that the spu stream idx exists. */
 600 static int vobsub_ensure_spu_stream(vobsub_t *vob, unsigned int index)
 601 {
 602     if (index >= vob->spu_streams_size) {
 603         /* This is a new stream */
 604         if (vob->spu_streams) {
 605             packet_queue_t *tmp = realloc(vob->spu_streams, (index + 1) * sizeof(packet_queue_t));
 606             if (tmp == NULL) {
 607                 mp_msg(MSGT_VOBSUB, MSGL_ERR, "vobsub_ensure_spu_stream: realloc failure");
 608                 return -1;
 609             }
 610             vob->spu_streams = tmp;
 611         } else {
 612             vob->spu_streams = malloc((index + 1) * sizeof(packet_queue_t));
 613             if (vob->spu_streams == NULL) {
 614                 mp_msg(MSGT_VOBSUB, MSGL_ERR, "vobsub_ensure_spu_stream: malloc failure");
 615                 return -1;
 616             }
 617         }
 618         while (vob->spu_streams_size <= index) {
 619             packet_queue_construct(vob->spu_streams + vob->spu_streams_size);
 620             ++vob->spu_streams_size;
 621         }
 622     }
 623     return 0;
 624 }
 625
 626 static int vobsub_add_id(vobsub_t *vob, const char *id, size_t idlen,
 627                          const unsigned int index)
 628 {
 629     if (vobsub_ensure_spu_stream(vob, index) < 0)
 630         return -1;
 631     if (id && idlen) {
 632         free(vob->spu_streams[index].id);
 633         vob->spu_streams[index].id = malloc(idlen + 1);
 634         if (vob->spu_streams[index].id == NULL) {
 635             mp_msg(MSGT_VOBSUB, MSGL_FATAL, "vobsub_add_id: malloc failure");
 636             return -1;
 637         }
 638         vob->spu_streams[index].id[idlen] = 0;
 639         memcpy(vob->spu_streams[index].id, id, idlen);
 640     }
 641     vob->spu_streams_current = index;
 642     mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VOBSUB_ID=%d\n", index);
 643     if (id && idlen)
 644         mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VSID_%d_LANG=%s\n", index, vob->spu_streams[index].id);
 645     mp_msg(MSGT_VOBSUB, MSGL_V, "[vobsub] subtitle (vobsubid): %d language %s\n",
 646            index, vob->spu_streams[index].id);
 647     return 0;
 648 }
 649
 650 static int vobsub_add_timestamp(vobsub_t *vob, off_t filepos, int ms)
 651 {
 652     packet_queue_t *queue;
 653     packet_t *pkt;
 654     if (vob->spu_streams == 0) {
 655         mp_msg(MSGT_VOBSUB, MSGL_WARN, "[vobsub] warning, binning some index entries.  Check your index file\n");
 656         return -1;
 657     }
 658     queue = vob->spu_streams + vob->spu_streams_current;
 659     if (packet_queue_grow(queue) >= 0) {
 660         pkt = queue->packets + (queue->packets_size - 1);
 661         pkt->filepos = filepos;
 662         pkt->pts100 = ms < 0 ? UINT_MAX : (unsigned int)ms * 90;
 663         return 0;
 664     }
 665     return -1;
 666 }
 667
 668 static int vobsub_parse_id(vobsub_t *vob, const char *line)
 669 {
 670     // id: xx, index: n
 671     size_t idlen;
 672     const char *p, *q;
 673     p  = line;
 674     while (isspace(*p))
 675         ++p;
 676     q = p;
 677     while (isalpha(*q))
 678         ++q;
 679     idlen = q - p;
 680     if (idlen == 0)
 681         return -1;
 682     ++q;
 683     while (isspace(*q))
 684         ++q;
 685     if (strncmp("index:", q, 6))
 686         return -1;
 687     q += 6;
 688     while (isspace(*q))
 689         ++q;
 690     if (!isdigit(*q))
 691         return -1;
 692     return vobsub_add_id(vob, p, idlen, atoi(q));
 693 }
 694
 695 static int vobsub_parse_timestamp(vobsub_t *vob, const char *line)
 696 {
 697     // timestamp: HH:MM:SS.mmm, filepos: 0nnnnnnnnn
 698     const char *p;
 699     int h, m, s, ms;
 700     off_t filepos;
 701     while (isspace(*line))
 702         ++line;
 703     p = line;
 704     while (isdigit(*p))
 705         ++p;
 706     if (p - line != 2)
 707         return -1;
 708     h = atoi(line);
 709     if (*p != ':')
 710         return -1;
 711     line = ++p;
 712     while (isdigit(*p))
 713         ++p;
 714     if (p - line != 2)
 715         return -1;
 716     m = atoi(line);
 717     if (*p != ':')
 718         return -1;
 719     line = ++p;
 720     while (isdigit(*p))
 721         ++p;
 722     if (p - line != 2)
 723         return -1;
 724     s = atoi(line);
 725     if (*p != ':')
 726         return -1;
 727     line = ++p;
 728     while (isdigit(*p))
 729         ++p;
 730     if (p - line != 3)
 731         return -1;
 732     ms = atoi(line);
 733     if (*p != ',')
 734         return -1;
 735     line = p + 1;
 736     while (isspace(*line))
 737         ++line;
 738     if (strncmp("filepos:", line, 8))
 739         return -1;
 740     line += 8;
 741     while (isspace(*line))
 742         ++line;
 743     if (! isxdigit(*line))
 744         return -1;
 745     filepos = strtol(line, NULL, 16);
 746     return vobsub_add_timestamp(vob, filepos, vob->delay + ms + 1000 * (s + 60 * (m + 60 * h)));
 747 }
 748
 749 static int vobsub_parse_origin(vobsub_t *vob, const char *line)
 750 {
 751     // org: X,Y
 752     char *p;
 753     while (isspace(*line))
 754         ++line;
 755     if (!isdigit(*line))
 756         return -1;
 757     vob->origin_x = strtoul(line, &p, 10);
 758     if (*p != ',')
 759         return -1;
 760     ++p;
 761     vob->origin_y = strtoul(p, NULL, 10);
 762     return 0;
 763 }
 764
 765 unsigned int vobsub_palette_to_yuv(unsigned int pal)
 766 {
 767     int r, g, b, y, u, v;
 768     // Palette in idx file is not rgb value, it was calculated by wrong formula.
 769     // Here's reversed formula of the one used to generate palette in idx file.
 770     r = pal >> 16 & 0xff;
 771     g = pal >> 8 & 0xff;
 772     b = pal & 0xff;
 773     y = av_clip_uint8( 0.1494  * r + 0.6061 * g + 0.2445 * b);
 774     u = av_clip_uint8( 0.6066  * r - 0.4322 * g - 0.1744 * b + 128);
 775     v = av_clip_uint8(-0.08435 * r - 0.3422 * g + 0.4266 * b + 128);
 776     y = y * 219 / 255 + 16;
 777     return y << 16 | u << 8 | v;
 778 }
 779
 780 unsigned int vobsub_rgb_to_yuv(unsigned int rgb)
 781 {
 782     int r, g, b, y, u, v;
 783     r = rgb >> 16 & 0xff;
 784     g = rgb >> 8 & 0xff;
 785     b = rgb & 0xff;
 786     y = ( 0.299   * r + 0.587   * g + 0.114   * b) * 219 / 255 + 16.5;
 787     u = (-0.16874 * r - 0.33126 * g + 0.5     * b) * 224 / 255 + 128.5;
 788     v = ( 0.5     * r - 0.41869 * g - 0.08131 * b) * 224 / 255 + 128.5;
 789     return y << 16 | u << 8 | v;
 790 }
 791
 792 static int vobsub_parse_delay(vobsub_t *vob, const char *line)
 793 {
 794     int h, m, s, ms;
 795     int forward = 1;
 796     if (*(line + 7) == '+') {
 797         forward = 1;
 798         line++;
 799     } else if (*(line + 7) == '-') {
 800         forward = -1;
 801         line++;
 802     }
 803     mp_msg(MSGT_SPUDEC, MSGL_V, "forward=%d", forward);
 804     h = atoi(line + 7);
 805     mp_msg(MSGT_VOBSUB, MSGL_V, "h=%d,", h);
 806     m = atoi(line + 10);
 807     mp_msg(MSGT_VOBSUB, MSGL_V, "m=%d,", m);
 808     s = atoi(line + 13);
 809     mp_msg(MSGT_VOBSUB, MSGL_V, "s=%d,", s);
 810     ms = atoi(line + 16);
 811     mp_msg(MSGT_VOBSUB, MSGL_V, "ms=%d", ms);
 812     vob->delay = (ms + 1000 * (s + 60 * (m + 60 * h))) * forward;
 813     return 0;
 814 }
 815
 816 static int vobsub_set_lang(const char *line)
 817 {
 818     if (vobsub_id == -1)
 819         vobsub_id = atoi(line + 8);
 820     return 0;
 821 }
 822
 823 static int vobsub_parse_one_line(vobsub_t *vob, rar_stream_t *fd,
 824                                  unsigned char **extradata,
 825                                  unsigned int *extradata_len)
 826 {
 827     ssize_t line_size;
 828     int res = -1;
 829         size_t line_reserve = 0;
 830         char *line = NULL;
 831     do {
 832         line_size = vobsub_getline(&line, &line_reserve, fd);
 833         if (line_size < 0 || line_size > 1000000 ||
 834             *extradata_len+line_size > 10000000) {
 835             break;
 836         }
 837
 838         *extradata = realloc(*extradata, *extradata_len+line_size+1);
 839         memcpy(*extradata+*extradata_len, line, line_size);
 840         *extradata_len += line_size;
 841         (*extradata)[*extradata_len] = 0;
 842
 843         if (*line == 0 || *line == '\r' || *line == '\n' || *line == '#')
 844             continue;
 845         else if (strncmp("langidx:", line, 8) == 0)
 846             res = vobsub_set_lang(line);
 847         else if (strncmp("delay:", line, 6) == 0)
 848             res = vobsub_parse_delay(vob, line);
 849         else if (strncmp("id:", line, 3) == 0)
 850             res = vobsub_parse_id(vob, line + 3);
 851         else if (strncmp("org:", line, 4) == 0)
 852             res = vobsub_parse_origin(vob, line + 4);
 853         else if (strncmp("timestamp:", line, 10) == 0)
 854             res = vobsub_parse_timestamp(vob, line + 10);
 855         else {
 856             mp_msg(MSGT_VOBSUB, MSGL_V, "vobsub: ignoring %s", line);
 857             continue;
 858         }
 859         if (res < 0)
 860             mp_msg(MSGT_VOBSUB, MSGL_ERR,  "ERROR in %s", line);
 861         break;
 862     } while (1);
 863     free(line);
 864     return res;
 865 }
 866
 867 int vobsub_parse_ifo(void* this, const char *const name, unsigned int *palette,
 868                      unsigned int *width, unsigned int *height, int force,
 869                      int sid, char *langid)
 870 {
 871     vobsub_t *vob = this;
 872     int res = -1;
 873     rar_stream_t *fd = rar_open(name, "rb");
 874     if (fd == NULL) {
 875         if (force)
 876             mp_msg(MSGT_VOBSUB, MSGL_WARN, "VobSub: Can't open IFO file\n");
 877     } else {
 878         // parse IFO header
 879         unsigned char block[0x800];
 880         const char *const ifo_magic = "DVDVIDEO-VTS";
 881         if (rar_read(block, sizeof(block), 1, fd) != 1) {
 882             if (force)
 883                 mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: Can't read IFO header\n");
 884         } else if (memcmp(block, ifo_magic, strlen(ifo_magic) + 1))
 885             mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: Bad magic in IFO header\n");
 886         else {
 887             unsigned long pgci_sector = block[0xcc] << 24 | block[0xcd] << 16
 888                 | block[0xce] << 8 | block[0xcf];
 889             int standard = (block[0x200] & 0x30) >> 4;
 890             int resolution = (block[0x201] & 0x0c) >> 2;
 891             *height = standard ? 576 : 480;
 892             *width = 0;
 893             switch (resolution) {
 894             case 0x0:
 895                 *width = 720;
 896                 break;
 897             case 0x1:
 898                 *width = 704;
 899                 break;
 900             case 0x2:
 901                 *width = 352;
 902                 break;
 903             case 0x3:
 904                 *width = 352;
 905                 *height /= 2;
 906                 break;
 907             default:
 908                 mp_msg(MSGT_VOBSUB, MSGL_WARN, "Vobsub: Unknown resolution %d \n", resolution);
 909             }
 910             if (langid && 0 <= sid && sid < 32) {
 911                 unsigned char *tmp = block + 0x256 + sid * 6 + 2;
 912                 langid[0] = tmp[0];
 913                 langid[1] = tmp[1];
 914                 langid[2] = 0;
 915             }
 916             if (rar_seek(fd, pgci_sector * sizeof(block), SEEK_SET)
 917                 || rar_read(block, sizeof(block), 1, fd) != 1)
 918                 mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: Can't read IFO PGCI\n");
 919             else {
 920                 unsigned long idx;
 921                 unsigned long pgc_offset = block[0xc] << 24 | block[0xd] << 16
 922                     | block[0xe] << 8 | block[0xf];
 923                 for (idx = 0; idx < 16; ++idx) {
 924                     unsigned char *p = block + pgc_offset + 0xa4 + 4 * idx;
 925                     palette[idx] = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
 926                 }
 927                 if (vob)
 928                     vob->have_palette = 1;
 929                 res = 0;
 930             }
 931         }
 932         rar_close(fd);
 933     }
 934     return res;
 935 }
 936
 937 void *vobsub_open(const char *const name, const char *const ifo,
 938                   const int force, void** spu)
 939 {
 940     unsigned char *extradata = NULL;
 941     unsigned int extradata_len = 0;
 942     vobsub_t *vob = calloc(1, sizeof(vobsub_t));
 943     if (spu)
 944         *spu = NULL;
 945     if (vobsubid == -2)
 946         vobsubid = vobsub_id;
 947     if (vob) {
 948         char *buf;
 949         buf = malloc(strlen(name) + 5);
 950         if (buf) {
 951             rar_stream_t *fd;
 952             mpeg_t *mpg;
 953             /* read in the info file */
 954             if (!ifo) {
 955                 strcpy(buf, name);
 956                 strcat(buf, ".ifo");
 957                 vobsub_parse_ifo(vob, buf, vob->palette, &vob->orig_frame_width, &vob->orig_frame_height, force, -1, NULL);
 958             } else
 959                 vobsub_parse_ifo(vob, ifo, vob->palette, &vob->orig_frame_width, &vob->orig_frame_height, force, -1, NULL);
 960             /* read in the index */
 961             strcpy(buf, name);
 962             strcat(buf, ".idx");
 963             fd = rar_open(buf, "rb");
 964             if (fd == NULL) {
 965                 if (force)
 966                     mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: Can't open IDX file\n");
 967                 else {
 968                     free(buf);
 969                     free(vob);
 970                     return NULL;
 971                 }
 972             } else {
 973                 while (vobsub_parse_one_line(vob, fd, &extradata, &extradata_len) >= 0)
 974                     /* NOOP */ ;
 975                 rar_close(fd);
 976             }
 977             if (spu)
 978                 *spu = spudec_new_scaled(vob->palette, vob->orig_frame_width, vob->orig_frame_height, extradata, extradata_len);
 979             free(extradata);
 980
 981             /* read the indexed mpeg_stream */
 982             strcpy(buf, name);
 983             strcat(buf, ".sub");
 984             mpg = mpeg_open(buf);
 985             if (mpg == NULL) {
 986                 if (force)
 987                     mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: Can't open SUB file\n");
 988                 else {
 989                     free(buf);
 990                     free(vob);
 991                     return NULL;
 992                 }
 993             } else {
 994                 long last_pts_diff = 0;
 995                 while (!mpeg_eof(mpg)) {
 996                     off_t pos = mpeg_tell(mpg);
 997                     if (mpeg_run(mpg) < 0) {
 998                         if (!mpeg_eof(mpg))
 999                             mp_msg(MSGT_VOBSUB, MSGL_ERR, "VobSub: mpeg_run error\n");
1000                         break;
1001                     }
1002                     if (mpg->packet_size) {
1003                         if ((mpg->aid & 0xe0) == 0x20) {
1004                             unsigned int sid = mpg->aid & 0x1f;
1005                             if (vobsub_ensure_spu_stream(vob, sid) >= 0)  {
1006                                 packet_queue_t *queue = vob->spu_streams + sid;
1007                                 /* get the packet to fill */
1008                                 if (queue->packets_size == 0 && packet_queue_grow(queue)  < 0)
1009                                   abort();
1010                                 while (queue->current_index + 1 < queue->packets_size
1011                                        && queue->packets[queue->current_index + 1].filepos <= pos)
1012                                     ++queue->current_index;
1013                                 if (queue->current_index < queue->packets_size) {
1014                                     packet_t *pkt;
1015                                     if (queue->packets[queue->current_index].data) {
1016                                         /* insert a new packet and fix the PTS ! */
1017                                         packet_queue_insert(queue);
1018                                         queue->packets[queue->current_index].pts100 =
1019                                             mpg->pts + last_pts_diff;
1020                                     }
1021                                     pkt = queue->packets + queue->current_index;
1022                                     if (pkt->pts100 != UINT_MAX) {
1023                                         if (queue->packets_size > 1)
1024                                             last_pts_diff = pkt->pts100 - mpg->pts;
1025                                         else
1026                                             pkt->pts100 = mpg->pts;
1027                                         if (mpg->merge && queue->current_index > 0) {
1028                                             packet_t *last = &queue->packets[queue->current_index - 1];
1029                                             pkt->pts100 = last->pts100;
1030                                         }
1031                                         mpg->merge = 0;
1032                                         /* FIXME: should not use mpg_sub internal informations, make a copy */
1033                                         pkt->data = mpg->packet;
1034                                         pkt->size = mpg->packet_size;
1035                                         mpg->packet = NULL;
1036                                         mpg->packet_reserve = 0;
1037                                         mpg->packet_size = 0;
1038                                     }
1039                                 }
1040                             } else
1041                                 mp_msg(MSGT_VOBSUB, MSGL_WARN, "don't know what to do with subtitle #%u\n", sid);
1042                         }
1043                     }
1044                 }
1045                 vob->spu_streams_current = vob->spu_streams_size;
1046                 while (vob->spu_streams_current-- > 0) {
1047                     vob->spu_streams[vob->spu_streams_current].current_index = 0;
1048                     if (vobsubid == vob->spu_streams_current ||
1049                         vob->spu_streams[vob->spu_streams_current].packets_size > 0)
1050                         ++vob->spu_valid_streams_size;
1051                 }
1052                 mpeg_free(mpg);
1053             }
1054             free(buf);
1055         }
1056     }
1057     return vob;
1058 }
1059
1060 void vobsub_close(void *this)
1061 {
1062     vobsub_t *vob = this;
1063     if (vob->spu_streams) {
1064         while (vob->spu_streams_size--)
1065             packet_queue_destroy(vob->spu_streams + vob->spu_streams_size);
1066         free(vob->spu_streams);
1067     }
1068     free(vob);
1069 }
1070
1071 unsigned int vobsub_get_indexes_count(void *vobhandle)
1072 {
1073     vobsub_t *vob = vobhandle;
1074     return vob->spu_valid_streams_size;
1075 }
1076
1077 char *vobsub_get_id(void *vobhandle, unsigned int index)
1078 {
1079     vobsub_t *vob = vobhandle;
1080     return (index < vob->spu_streams_size) ? vob->spu_streams[index].id : NULL;
1081 }
1082
1083 int vobsub_get_id_by_index(void *vobhandle, unsigned int index)
1084 {
1085     vobsub_t *vob = vobhandle;
1086     int i, j;
1087     if (vob == NULL)
1088         return -1;
1089     for (i = 0, j = 0; i < vob->spu_streams_size; ++i)
1090         if (i == vobsubid || vob->spu_streams[i].packets_size > 0) {
1091             if (j == index)
1092                 return i;
1093             ++j;
1094         }
1095     return -1;
1096 }
1097
1098 int vobsub_get_index_by_id(void *vobhandle, int id)
1099 {
1100     vobsub_t *vob = vobhandle;
1101     int i, j;
1102     if (vob == NULL || id < 0 || id >= vob->spu_streams_size)
1103         return -1;
1104     if (id != vobsubid && !vob->spu_streams[id].packets_size)
1105         return -1;
1106     for (i = 0, j = 0; i < id; ++i)
1107         if (i == vobsubid || vob->spu_streams[i].packets_size > 0)
1108             ++j;
1109     return j;
1110 }
1111
1112 int vobsub_set_from_lang(void *vobhandle, char **lang)
1113 {
1114     int i;
1115     vobsub_t *vob= vobhandle;
1116     if (!lang)
1117         goto end;
1118     for (int n = 0; lang[n]; n++) {
1119         for (i = 0; i < vob->spu_streams_size; i++)
1120             if (vob->spu_streams[i].id)
1121                 if ((strncmp(vob->spu_streams[i].id, lang[n], 2) == 0)) {
1122                     vobsub_id = i;
1123                     mp_msg(MSGT_VOBSUB, MSGL_INFO, "Selected VOBSUB language: %d language: %s\n", i, vob->spu_streams[i].id);
1124                     return 0;
1125                 }
1126     }
1127 end:
1128     mp_msg(MSGT_VOBSUB, MSGL_WARN, "No matching VOBSUB language found!\n");
1129     return -1;
1130 }
1131
1132 /// make sure we seek to the first packet of packets having same pts values.
1133 static void vobsub_queue_reseek(packet_queue_t *queue, unsigned int pts100)
1134 {
1135     int reseek_count = 0;
1136     unsigned int lastpts = 0;
1137
1138     if (queue->current_index > 0
1139         && (queue->packets[queue->current_index].pts100 == UINT_MAX
1140             ||  queue->packets[queue->current_index].pts100 > pts100)) {
1141       // possible pts seek previous, try to check it.
1142       int i = 1;
1143       while (queue->current_index >= i
1144              && queue->packets[queue->current_index-i].pts100 == UINT_MAX)
1145           ++i;
1146       if (queue->current_index >= i
1147           && queue->packets[queue->current_index-i].pts100 > pts100)
1148           // pts seek previous confirmed, reseek from beginning
1149           queue->current_index = 0;
1150     }
1151     while (queue->current_index < queue->packets_size
1152            && queue->packets[queue->current_index].pts100 <= pts100) {
1153         lastpts = queue->packets[queue->current_index].pts100;
1154         ++queue->current_index;
1155         ++reseek_count;
1156     }
1157     while (reseek_count-- && --queue->current_index) {
1158         if (queue->packets[queue->current_index-1].pts100 != UINT_MAX &&
1159             queue->packets[queue->current_index-1].pts100 != lastpts)
1160             break;
1161     }
1162 }
1163
1164 int vobsub_get_packet(void *vobhandle, float pts, void** data, int* timestamp)
1165 {
1166     vobsub_t *vob = vobhandle;
1167     unsigned int pts100 = 90000 * pts;
1168     if (vob->spu_streams && 0 <= vobsub_id && (unsigned) vobsub_id < vob->spu_streams_size) {
1169         packet_queue_t *queue = vob->spu_streams + vobsub_id;
1170
1171         vobsub_queue_reseek(queue, pts100);
1172
1173         while (queue->current_index < queue->packets_size) {
1174             packet_t *pkt = queue->packets + queue->current_index;
1175             if (pkt->pts100 != UINT_MAX)
1176                 if (pkt->pts100 <= pts100) {
1177                     ++queue->current_index;
1178                     *data = pkt->data;
1179                     *timestamp = pkt->pts100;
1180                     return pkt->size;
1181                 } else
1182                     break;
1183             else
1184                 ++queue->current_index;
1185         }
1186     }
1187     return -1;
1188 }
1189
1190 int vobsub_get_next_packet(void *vobhandle, void** data, int* timestamp)
1191 {
1192     vobsub_t *vob = vobhandle;
1193     if (vob->spu_streams && 0 <= vobsub_id && (unsigned) vobsub_id < vob->spu_streams_size) {
1194         packet_queue_t *queue = vob->spu_streams + vobsub_id;
1195         if (queue->current_index < queue->packets_size) {
1196             packet_t *pkt = queue->packets + queue->current_index;
1197             ++queue->current_index;
1198             *data = pkt->data;
1199             *timestamp = pkt->pts100;
1200             return pkt->size;
1201         }
1202     }
1203     return -1;
1204 }
1205
1206 void vobsub_seek(void * vobhandle, float pts)
1207 {
1208     vobsub_t * vob = vobhandle;
1209     packet_queue_t * queue;
1210     int seek_pts100 = pts * 90000;
1211
1212     if (vob->spu_streams && 0 <= vobsub_id && (unsigned) vobsub_id < vob->spu_streams_size) {
1213         /* do not seek if we don't know the id */
1214         if (vobsub_get_id(vob, vobsub_id) == NULL)
1215             return;
1216         queue = vob->spu_streams + vobsub_id;
1217         queue->current_index = 0;
1218         vobsub_queue_reseek(queue, seek_pts100);
1219     }
1220 }
1221
1222 void vobsub_reset(void *vobhandle)
1223 {
1224     vobsub_t *vob = vobhandle;
1225     if (vob->spu_streams) {
1226         unsigned int n = vob->spu_streams_size;
1227         while (n-- > 0)
1228             vob->spu_streams[n].current_index = 0;
1229     }
1230 }
1231
1232 /**********************************************************************
1233  * Vobsub output
1234  **********************************************************************/
1235
1236 typedef struct {
1237     FILE *fsub;
1238     FILE *fidx;
1239     unsigned int aid;
1240 } vobsub_out_t;
1241
1242 static void create_idx(vobsub_out_t *me, const unsigned int *palette,
1243                        unsigned int orig_width, unsigned int orig_height)
1244 {
1245     int i;
1246     fprintf(me->fidx,
1247             "# VobSub index file, v7 (do not modify this line!)\n"
1248             "#\n"
1249             "# Generated by %s\n"
1250             "# See <URL:http://www.mplayerhq.hu/> for more information about MPlayer\n"
1251             "# See <URL:http://wiki.multimedia.cx/index.php?title=VOBsub> for more information about Vobsub\n"
1252             "#\n"
1253             "size: %ux%u\n",
1254             mplayer_version, orig_width, orig_height);
1255     if (palette) {
1256         fputs("palette:", me->fidx);
1257         for (i = 0; i < 16; ++i) {
1258             const double y =  palette[i] >> 16 & 0xff,
1259                          u = (palette[i] >>  8 & 0xff) - 128.0,
1260                          v = (palette[i]       & 0xff) - 128.0;
1261             if (i)
1262                 putc(',', me->fidx);
1263             fprintf(me->fidx, " %02x%02x%02x",
1264                     av_clip_uint8(y + 1.4022 * u),
1265                     av_clip_uint8(y - 0.3456 * u - 0.7145 * v),
1266                     av_clip_uint8(y + 1.7710 * v));
1267         }
1268         putc('\n', me->fidx);
1269     }
1270
1271     fprintf(me->fidx, "# ON: displays only forced subtitles, OFF: shows everything\n"
1272             "forced subs: OFF\n");
1273 }
1274
1275 void *vobsub_out_open(const char *basename, const unsigned int *palette,
1276                       unsigned int orig_width, unsigned int orig_height,
1277                       const char *id, unsigned int index)
1278 {
1279     vobsub_out_t *result = NULL;
1280     char *filename;
1281     filename = malloc(strlen(basename) + 5);
1282     if (filename) {
1283         result = malloc(sizeof(vobsub_out_t));
1284         if (result) {
1285             result->aid = index;
1286             strcpy(filename, basename);
1287             strcat(filename, ".sub");
1288             result->fsub = fopen(filename, "ab");
1289             if (result->fsub == NULL)
1290                 perror("Error: vobsub_out_open subtitle file open failed");
1291             strcpy(filename, basename);
1292             strcat(filename, ".idx");
1293             result->fidx = fopen(filename, "ab");
1294             if (result->fidx) {
1295                 if (ftell(result->fidx) == 0) {
1296                     create_idx(result, palette, orig_width, orig_height);
1297                     /* Make the selected language the default language */
1298                     fprintf(result->fidx, "\n# Language index in use\nlangidx: %u\n", index);
1299                 }
1300                 fprintf(result->fidx, "\nid: %s, index: %u\n", id ? id : "xx", index);
1301                 /* So that we can check the file now */
1302                 fflush(result->fidx);
1303             } else
1304                 perror("Error: vobsub_out_open index file open failed");
1305             free(filename);
1306         }
1307     }
1308     return result;
1309 }
1310
1311 void vobsub_out_close(void *me)
1312 {
1313     vobsub_out_t *vob = me;
1314     if (vob->fidx)
1315         fclose(vob->fidx);
1316     if (vob->fsub)
1317         fclose(vob->fsub);
1318     free(vob);
1319 }
1320
1321 void vobsub_out_output(void *me, const unsigned char *packet,
1322                        int len, double pts)
1323 {
1324     static double last_pts;
1325     static int last_pts_set = 0;
1326     vobsub_out_t *vob = me;
1327     if (vob->fsub) {
1328         /*  Windows' Vobsub require that every packet is exactly 2kB long */
1329         unsigned char buffer[2048];
1330         unsigned char *p;
1331         int remain = 2048;
1332         /* Do not output twice a line with the same timestamp, this
1333            breaks Windows' Vobsub */
1334         if (vob->fidx && (!last_pts_set || last_pts != pts)) {
1335             static unsigned int last_h = 9999, last_m = 9999, last_s = 9999, last_ms = 9999;
1336             unsigned int h, m, ms;
1337             double s;
1338             s = pts;
1339             h = s / 3600;
1340             s -= h * 3600;
1341             m = s / 60;
1342             s -= m * 60;
1343             ms = (s - (unsigned int) s) * 1000;
1344             if (ms >= 1000)     /* prevent overfolws or bad float stuff */
1345                 ms = 0;
1346             if (h != last_h || m != last_m || (unsigned int) s != last_s || ms != last_ms) {
1347                 fprintf(vob->fidx, "timestamp: %02u:%02u:%02u:%03u, filepos: %09lx\n",
1348                         h, m, (unsigned int) s, ms, ftell(vob->fsub));
1349                 last_h = h;
1350                 last_m = m;
1351                 last_s = (unsigned int) s;
1352                 last_ms = ms;
1353             }
1354         }
1355         last_pts = pts;
1356         last_pts_set = 1;
1357
1358         /* Packet start code: Windows' Vobsub needs this */
1359         p = buffer;
1360         *p++ = 0;               /* 0x00 */
1361         *p++ = 0;
1362         *p++ = 1;
1363         *p++ = 0xba;
1364         *p++ = 0x40;
1365         memset(p, 0, 9);
1366         p += 9;
1367         {   /* Packet */
1368             static unsigned char last_pts[5] = { 0, 0, 0, 0, 0};
1369             unsigned char now_pts[5];
1370             int pts_len, pad_len, datalen = len;
1371             pts *= 90000;
1372             now_pts[0] = 0x21 | (((unsigned long)pts >> 29) & 0x0e);
1373             now_pts[1] = ((unsigned long)pts >> 22) & 0xff;
1374             now_pts[2] = 0x01 | (((unsigned long)pts >> 14) & 0xfe);
1375             now_pts[3] = ((unsigned long)pts >> 7) & 0xff;
1376             now_pts[4] = 0x01 | (((unsigned long)pts << 1) & 0xfe);
1377             pts_len = memcmp(last_pts, now_pts, sizeof(now_pts)) ? sizeof(now_pts) : 0;
1378             memcpy(last_pts, now_pts, sizeof(now_pts));
1379
1380             datalen += 3;       /* Version, PTS_flags, pts_len */
1381             datalen += pts_len;
1382             datalen += 1;       /* AID */
1383             pad_len = 2048 - (p - buffer) - 4 /* MPEG ID */ - 2 /* payload len */ - datalen;
1384             /* XXX - Go figure what should go here!  In any case the
1385                packet has to be completly filled.  If I can fill it
1386                with padding (0x000001be) latter I'll do that.  But if
1387                there is only room for 6 bytes then I can not write a
1388                padding packet.  So I add some padding in the PTS
1389                field.  This looks like a dirty kludge.  Oh well... */
1390             if (pad_len < 0) {
1391                 /* Packet is too big.  Let's try ommiting the PTS field */
1392                 datalen -= pts_len;
1393                 pts_len = 0;
1394                 pad_len = 0;
1395             } else if (pad_len > 6)
1396                 pad_len = 0;
1397             datalen += pad_len;
1398
1399             *p++ = 0;           /* 0x0e */
1400             *p++ = 0;
1401             *p++ = 1;
1402             *p++ = 0xbd;
1403
1404             *p++ = (datalen >> 8) & 0xff; /* length of payload */
1405             *p++ = datalen & 0xff;
1406             *p++ = 0x80;                /* System-2 (.VOB) stream */
1407             *p++ = pts_len ? 0x80 : 0x00; /* pts_flags */
1408             *p++ = pts_len + pad_len;
1409             memcpy(p, now_pts, pts_len);
1410             p += pts_len;
1411             memset(p, 0, pad_len);
1412             p += pad_len;
1413         }
1414         *p++ = 0x20 |  vob->aid; /* aid */
1415         if (fwrite(buffer, p - buffer, 1, vob->fsub) != 1
1416             || fwrite(packet, len, 1, vob->fsub) != 1)
1417             perror("ERROR: vobsub write failed");
1418         else
1419             remain -= p - buffer + len;
1420
1421         /* Padding */
1422         if (remain >= 6) {
1423             p = buffer;
1424             *p++ = 0x00;
1425             *p++ = 0x00;
1426             *p++ = 0x01;
1427             *p++ = 0xbe;
1428             *p++ = (remain - 6) >> 8;
1429             *p++ = (remain - 6) & 0xff;
1430             /* for better compression, blank this */
1431             memset(buffer + 6, 0, remain - (p - buffer));
1432             if (fwrite(buffer, remain, 1, vob->fsub) != 1)
1433                 perror("ERROR: vobsub padding write failed");
1434         } else if (remain > 0) {
1435             /* I don't know what to output.  But anyway the block
1436                needs to be 2KB big */
1437             memset(buffer, 0, remain);
1438             if (fwrite(buffer, remain, 1, vob->fsub) != 1)
1439                 perror("ERROR: vobsub blank padding write failed");
1440         } else if (remain < 0)
1441             fprintf(stderr,
1442                     "\nERROR: wrong thing happenned...\n"
1443                     "  I wrote a %i data bytes spu packet and that's too long\n", len);
1444     }
1445 }