lib/dvb/subtitle.cpp

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <fcntl.h>
   4 #include <memory.h>
   5 #include <time.h>
   6
   7 #include <asm/types.h>
   8 #include <lib/dvb/idemux.h>
   9 #include <lib/dvb/subtitle.h>
  10 #include <lib/base/smartptr.h>
  11 #include <lib/base/eerror.h>
  12 #include <lib/gdi/gpixmap.h>
  13
  14 void bitstream_init(bitstream *bit, const void *buffer, int size)
  15 {
  16         bit->data = (__u8*) buffer;
  17         bit->size = size;
  18         bit->avail = 8;
  19         bit->consumed = 0;
  20 }
  21
  22 int bitstream_get(bitstream *bit)
  23 {
  24         int val;
  25         bit->avail -= bit->size;
  26         val = ((*bit->data) >> bit->avail) & ((1<<bit->size) - 1);
  27         if (!bit->avail)
  28         {
  29                 bit->data++;
  30                 bit->consumed++;
  31                 bit->avail = 8;
  32         }
  33         return val;
  34 }
  35
  36 static int extract_pts(pts_t &pts, __u8 *pkt)
  37 {
  38         pkt += 7;
  39         int flags = *pkt++;
  40
  41         pkt++; // header length
  42
  43         if (flags & 0x80) /* PTS present? */
  44         {
  45                         /* damn gcc bug */
  46                 pts  = ((unsigned long long)(((pkt[0] >> 1) & 7))) << 30;
  47                 pts |=   pkt[1] << 22;
  48                 pts |=  (pkt[2]>>1) << 15;
  49                 pts |=   pkt[3] << 7;
  50                 pts |=  (pkt[5]>>1);
  51
  52                 return 0;
  53         } else
  54                 return -1;
  55 }
  56
  57 void eDVBSubtitleParser::subtitle_process_line(subtitle_page *page, int object_id, int line, __u8 *data, int len)
  58 {
  59         subtitle_region *region = page->regions;
  60 //      eDebug("line for %d:%d", page->page_id, object_id);
  61         while (region)
  62         {
  63                 subtitle_region_object *object = region->region_objects;
  64                 while (object)
  65                 {
  66                         if (object->object_id == object_id)
  67                         {
  68                                 int x = object->object_horizontal_position;
  69                                 int y = object->object_vertical_position + line;
  70                                 if (x + len > region->region_width)
  71                                 {
  72                                         //eDebug("[SUB] !!!! XCLIP %d + %d > %d", x, len, region->region_width);
  73                                         len = region->region_width - x;
  74                                 }
  75                                 if (len < 0)
  76                                         break;
  77                                 if (y >= region->region_height)
  78                                 {
  79                                         //eDebug("[SUB] !!!! YCLIP %d >= %d", y, region->region_height);
  80                                         break;
  81                                 }
  82 //                              //eDebug("inserting %d bytes (into region %d)", len, region->region_id);
  83 //                              eDebug("put data to region_buffer %p", &(*region->region_buffer));
  84                                 memcpy((__u8*)region->region_buffer->surface->data + region->region_width * y + x, data, len);
  85                         }
  86                         object = object->next;
  87                 }
  88                 region = region->next;
  89         }
  90 }
  91
  92 int eDVBSubtitleParser::subtitle_process_pixel_data(subtitle_page *page, int object_id, int *linenr, int *linep, __u8 *data)
  93 {
  94         int data_type = *data++;
  95         static __u8 line[720];
  96
  97         bitstream bit;
  98         bit.size=0;
  99         switch (data_type)
 100         {
 101         case 0x10: // 2bit pixel data
 102                 bitstream_init(&bit, data, 2);
 103                 while (1)
 104                 {
 105                         int len=0, col=0;
 106                         int code = bitstream_get(&bit);
 107                         if (code)
 108                         {
 109                                 col = code;
 110                                 len = 1;
 111                         } else
 112                         {
 113                                 code = bitstream_get(&bit);
 114                                 if (!code)
 115                                 {
 116                                         code = bitstream_get(&bit);
 117                                         if (code == 1)
 118                                         {
 119                                                 col = 0;
 120                                                 len = 2;
 121                                         } else if (code == 2)
 122                                         {
 123                                                 len = bitstream_get(&bit) << 2;
 124                                                 len |= bitstream_get(&bit);
 125                                                 len += 12;
 126                                                 col = bitstream_get(&bit);
 127                                         } else if (code == 3)
 128                                         {
 129                                                 len = bitstream_get(&bit) << 6;
 130                                                 len |= bitstream_get(&bit) << 4;
 131                                                 len |= bitstream_get(&bit) << 2;
 132                                                 len |= bitstream_get(&bit);
 133                                                 len += 29;
 134                                                 col = bitstream_get(&bit);
 135                                         } else
 136                                                 break;
 137                                 } else if (code==1)
 138                                 {
 139                                         col = 0;
 140                                         len = 1;
 141                                 } else if (code&2)
 142                                 {
 143                                         if (code&1)
 144                                                 len = 3 + 4 + bitstream_get(&bit);
 145                                         else
 146                                                 len = 3 + bitstream_get(&bit);
 147                                         col = bitstream_get(&bit);
 148                                 }
 149                         }
 150                         while (len && ((*linep) < 720))
 151                         {
 152                                 line[(*linep)++] = col;
 153                                 len--;
 154                         }
 155                 }
 156                 while (bit.avail != 8)
 157                         bitstream_get(&bit);
 158                 return bit.consumed + 1;
 159         case 0x11: // 4bit pixel data
 160                 bitstream_init(&bit, data, 4);
 161                 while (1)
 162                 {
 163                         int len=0, col=0;
 164                         int code = bitstream_get(&bit);
 165                         if (code)
 166                         {
 167                                 col = code;
 168                                 len = 1;
 169                         } else
 170                         {
 171                                 code = bitstream_get(&bit);
 172                                 if (!code)
 173                                         break;
 174                                 else if (code == 0xC)
 175                                 {
 176                                         col = 0;
 177                                         len = 1;
 178                                 } else if (code == 0xD)
 179                                 {
 180                                         col = 0;
 181                                         len = 2;
 182                                 } else if (code < 8)
 183                                 {
 184                                         col = 0;
 185                                         len = (code & 7) + 2;
 186                                 } else if ((code & 0xC) == 0x8)
 187                                 {
 188                                         col = bitstream_get(&bit);
 189                                         len = (code & 3) + 4;
 190                                 } else if (code == 0xE)
 191                                 {
 192                                         len = bitstream_get(&bit) + 9;
 193                                         col = bitstream_get(&bit);
 194                                 } else if (code == 0xF)
 195                                 {
 196                                         len  = bitstream_get(&bit) << 4;
 197                                         len |= bitstream_get(&bit);
 198                                         len += 25;
 199                                         col  = bitstream_get(&bit);
 200                                 }
 201                         }
 202                         while (len && ((*linep) < 720))
 203                         {
 204                                 line[(*linep)++] = col;
 205                                 len--;
 206                         }
 207                 }
 208                 while (bit.avail != 8)
 209                         bitstream_get(&bit);
 210                 return bit.consumed + 1;
 211         case 0x12: // 8bit pixel data
 212                 bitstream_init(&bit, data, 8);
 213                 while(1)
 214                 {
 215                         int len=0, col=0;
 216                         int code = bitstream_get(&bit);
 217                         if (code)
 218                         {
 219                                 col = code;
 220                                 len = 1;
 221                         } else
 222                         {
 223                                 code = bitstream_get(&bit);
 224                                 if ((code & 0x80) == 0x80)
 225                                 {
 226                                         len = code&0x7F;
 227                                         col = bitstream_get(&bit);
 228                                 } else if (code&0x7F)
 229                                 {
 230                                         len = code&0x7F;
 231                                         col = 0;
 232                                 } else
 233                                         break;
 234                         }
 235                         while (len && ((*linep) < 720))
 236                         {
 237                                 line[(*linep)++] = col;
 238                                 len--;
 239                         }
 240                 }
 241                 return bit.consumed + 1;
 242         case 0x20:  // ignore 2 -> 4bit map table
 243                 bitstream_init(&bit, data, 4);
 244                 for ( int i=0; i < 4; ++i )
 245                         bitstream_get(&bit);
 246                 break;
 247         case 0x21:  // ignore 2 -> 8bit map table
 248                 bitstream_init(&bit, data, 8);
 249                 for ( int i=0; i < 4; ++i )
 250                         bitstream_get(&bit);
 251                 break;
 252         case 0x22:  // ignore 4 -> 8bit map table
 253                 bitstream_init(&bit, data, 8);
 254                 for ( int i=0; i < 16; ++i )
 255                         bitstream_get(&bit);
 256                 break;
 257         case 0xF0:
 258                 subtitle_process_line(page, object_id, *linenr, line, *linep);
 259 /*              {
 260                         int i;
 261                         for (i=0; i<720; ++i)
 262                                 //eDebugNoNewLine("%d ", line[i]);
 263                         //eDebug("");
 264                 } */
 265                 (*linenr)+=2; // interlaced
 266                 *linep = 0;
 267 //              //eDebug("[SUB] EOL");
 268                 return 1;
 269         default:
 270                 eDebug("subtitle_process_pixel_data: invalid data_type %02x", data_type);
 271                 return -1;
 272         }
 273         return 0;
 274 }
 275
 276 int eDVBSubtitleParser::subtitle_process_segment(__u8 *segment)
 277 {
 278         int segment_type, page_id, segment_length, processed_length;
 279         if (*segment++ !=  0x0F)
 280         {
 281                 eDebug("out of sync.");
 282                 return -1;
 283         }
 284         segment_type = *segment++;
 285         page_id  = *segment++ << 8;
 286         page_id |= *segment++;
 287         segment_length  = *segment++ << 8;
 288         segment_length |= *segment++;
 289         if (segment_type == 0xFF)
 290                 return segment_length + 6;
 291         if (page_id != m_composition_page_id && page_id != m_ancillary_page_id)
 292                 return segment_length + 6;
 293 //      //eDebug("have %d bytes of segment data", segment_length);
 294
 295 //      //eDebug("page_id %d, segtype %02x", page_id, segment_type);
 296
 297         subtitle_page *page, **ppage;
 298
 299         page = m_pages; ppage = &m_pages;
 300
 301         while (page)
 302         {
 303                 if (page->page_id == page_id)
 304                         break;
 305                 ppage = &page->next;
 306                 page = page->next;
 307         }
 308
 309         processed_length = 0;
 310
 311         switch (segment_type)
 312         {
 313         case 0x10: // page composition segment
 314         {
 315                 int page_time_out = *segment++; processed_length++;
 316                 int page_version_number = *segment >> 4;
 317                 int page_state = (*segment >> 2) & 0x3;
 318                 //eDebug("pcs with %d bytes data (%d:%d:%d)", segment_length, page_id, page_version_number, page_state);
 319                 segment++;
 320                 processed_length++;
 321
 322                 //eDebug("page time out: %d", page_time_out);
 323                 //eDebug("page_version_number: %d" ,page_version_number);
 324                 //eDebug("page_state: %d", page_state);
 325
 326                 if (!page)
 327                 {
 328                         //eDebug("page not found");
 329                         page = new subtitle_page;
 330                         page->page_regions = 0;
 331                         page->regions = 0;
 332                         page->page_id = page_id;
 333                         page->cluts = 0;
 334                         page->next = 0;
 335                         *ppage = page;
 336                 } else
 337                 {
 338                         if (page->pcs_size != segment_length)
 339                                 page->page_version_number = -1;
 340                                 // if no update, just skip this data.
 341                         if (page->page_version_number == page_version_number)
 342                         {
 343 //                              eDebug("skip data... ");
 344                                 break;
 345                         }
 346                 }
 347
 348 //              eDebug("page updated: old: %d, new: %d", page->page_version_number, page_version_number);
 349                         // when acquisition point or mode change: remove all displayed pages.
 350                 if ((page_state == 1) || (page_state == 2))
 351                 {
 352                         while (page->page_regions)
 353                         {
 354                                 subtitle_page_region *p = page->page_regions->next;
 355                                 delete page->page_regions;
 356                                 page->page_regions = p;
 357                         }
 358                 }
 359
 360 //              eDebug("new page.. (%d)", page_state);
 361
 362                 page->page_time_out = page_time_out;
 363
 364                 page->page_version_number = page_version_number;
 365
 366                 subtitle_page_region **r = &page->page_regions;
 367
 368                 //eDebug("%d  / %d data left", processed_length, segment_length);
 369
 370                         // go to last entry
 371                 while (*r)
 372                         r = &(*r)->next;
 373
 374                 while (processed_length < segment_length)
 375                 {
 376                         subtitle_page_region *pr;
 377
 378                                 // append new entry to list
 379                         pr = new subtitle_page_region;
 380                         pr->next = 0;
 381                         *r = pr;
 382                         r = &pr->next;
 383
 384                         pr->region_id = *segment++; processed_length++;
 385                         segment++; processed_length++;
 386
 387                         pr->region_horizontal_address  = *segment++ << 8;
 388                         pr->region_horizontal_address |= *segment++;
 389                         processed_length += 2;
 390
 391                         pr->region_vertical_address  = *segment++ << 8;
 392                         pr->region_vertical_address |= *segment++;
 393                         processed_length += 2;
 394
 395                         //eDebug("appended active region");
 396                 }
 397
 398                 if (processed_length != segment_length)
 399                         eDebug("%d != %d", processed_length, segment_length);
 400                 break;
 401         }
 402         case 0x11: // region composition segment
 403         {
 404                 int region_id = *segment++; processed_length++;
 405                 int region_version_number = *segment >> 4;
 406                 int region_fill_flag = (*segment >> 3) & 1;
 407                 segment++; processed_length++;
 408
 409                         // if we didn't yet received the pcs for this page, drop the region
 410                 if (!page)
 411                 {
 412                         eDebug("ignoring region %x, since page %02x doesn't yet exist.", region_id, page_id);
 413                         break;
 414                 }
 415
 416                 subtitle_region *region, **pregion;
 417
 418                 region = page->regions; pregion = &page->regions;
 419
 420                 while (region)
 421                 {
 422                         fflush(stdout);
 423                         if (region->region_id == region_id)
 424                                 break;
 425                         pregion = &region->next;
 426                         region = region->next;
 427                 }
 428
 429                 if (!region)
 430                 {
 431                         *pregion = region = new subtitle_region;
 432                         region->next = 0;
 433                         region->committed = false;
 434                 }
 435                 else if (region->region_version_number != region_version_number)
 436                 {
 437                         subtitle_region_object *objects = region->region_objects;
 438                         while (objects)
 439                         {
 440                                 subtitle_region_object *n = objects->next;
 441                                 delete objects;
 442                                 objects = n;
 443                         }
 444                         if (region->region_buffer)
 445                         {
 446 //                              eDebug("no more need of region_buffer %p", &(*region->region_buffer));
 447                                 region->region_buffer=0;
 448                         }
 449                         region->committed = false;
 450                 }
 451                 else
 452                         break;
 453
 454                 //eDebug("region %d:%d update", page_id, region_id);
 455
 456                 region->region_id = region_id;
 457                 region->region_version_number = region_version_number;
 458
 459                 region->region_width  = *segment++ << 8;
 460                 region->region_width |= *segment++;
 461                 processed_length += 2;
 462
 463                 region->region_height  = *segment++ << 8;
 464                 region->region_height |= *segment++;
 465                 processed_length += 2;
 466
 467                 region->region_buffer = new gPixmap(eSize(region->region_width, region->region_height), 8);
 468 //              eDebug("new region_buffer %p", &(*region->region_buffer));
 469
 470                 int region_level_of_compatibility, region_depth;
 471
 472                 region_level_of_compatibility = (*segment >> 5) & 7;
 473                 region_depth = (*segment++ >> 2) & 7;
 474                 region->region_depth = (subtitle_region::depth) region_depth;
 475                 processed_length++;
 476
 477                 int CLUT_id = *segment++; processed_length++;
 478
 479                 region->clut_id = CLUT_id;
 480
 481                 int region_8bit_pixel_code, region_4bit_pixel_code, region_2bit_pixel_code;
 482                 region_8bit_pixel_code = *segment++; processed_length++;
 483                 region_4bit_pixel_code = *segment >> 4;
 484                 region_2bit_pixel_code = (*segment++ >> 2) & 3;
 485                 processed_length++;
 486
 487                 if (!region_fill_flag)
 488                 {
 489                         region_2bit_pixel_code = region_4bit_pixel_code = region_8bit_pixel_code = 0;
 490                         region_fill_flag = 1;
 491                 }
 492
 493                 if (region_fill_flag)
 494                 {
 495 //                      eDebug("region fill region_buffer %p", &(*region->region_buffer));
 496                         if (region_depth == 1)
 497                                 memset(region->region_buffer->surface->data, region_2bit_pixel_code, region->region_height * region->region_width);
 498                         else if (region_depth == 2)
 499                                 memset(region->region_buffer->surface->data, region_4bit_pixel_code, region->region_height * region->region_width);
 500                         else if (region_depth == 3)
 501                                 memset(region->region_buffer->surface->data, region_8bit_pixel_code, region->region_height * region->region_width);
 502                         else
 503                                 eDebug("!!!! invalid depth");
 504                 }
 505
 506                 //eDebug("region %02x, version %d, %dx%d", region->region_id, region->region_version_number, region->region_width, region->region_height);
 507
 508                 region->region_objects = 0;
 509                 subtitle_region_object **pobject = &region->region_objects;
 510
 511                 while (processed_length < segment_length)
 512                 {
 513                         subtitle_region_object *object;
 514
 515                         object = new subtitle_region_object;
 516
 517                         *pobject = object;
 518                         object->next = 0;
 519                         pobject = &object->next;
 520
 521                         object->object_id  = *segment++ << 8;
 522                         object->object_id |= *segment++; processed_length += 2;
 523
 524                         object->object_type = *segment >> 6;
 525                         object->object_provider_flag = (*segment >> 4) & 3;
 526                         object->object_horizontal_position  = (*segment++ & 0xF) << 8;
 527                         object->object_horizontal_position |= *segment++;
 528                         processed_length += 2;
 529
 530                         object->object_vertical_position  = *segment++ << 8;
 531                         object->object_vertical_position |= *segment++ ;
 532                         processed_length += 2;
 533
 534                         if ((object->object_type == 1) || (object->object_type == 2))
 535                         {
 536                                 object->foreground_pixel_value = *segment++;
 537                                 object->background_pixel_value = *segment++;
 538                                 processed_length += 2;
 539                         }
 540                 }
 541
 542                 if (processed_length != segment_length)
 543                         eDebug("too less data! (%d < %d)", segment_length, processed_length);
 544
 545                 break;
 546         }
 547         case 0x12: // CLUT definition segment
 548         {
 549                 int CLUT_id, CLUT_version_number;
 550                 subtitle_clut *clut, **pclut;
 551
 552                 if (!page)
 553                         break;
 554
 555                 //eDebug("CLUT: %02x", *segment);
 556                 CLUT_id = *segment++;
 557
 558                 CLUT_version_number = *segment++ >> 4;
 559                 processed_length += 2;
 560
 561                 //eDebug("page %d, CLUT %02x, version %d", page->page_id, CLUT_id, CLUT_version_number);
 562
 563                 clut = page->cluts; pclut = &page->cluts;
 564
 565                 while (clut)
 566                 {
 567                         if (clut->clut_id == CLUT_id)
 568                                 break;
 569                         pclut = &clut->next;
 570                         clut = clut->next;
 571                 }
 572
 573                 if (!clut)
 574                 {
 575                         *pclut = clut = new subtitle_clut;
 576                         clut->next = 0;
 577                         clut->clut_id = CLUT_id;
 578                 }
 579                 else if (clut->CLUT_version_number == CLUT_version_number)
 580                         break;
 581
 582                 clut->CLUT_version_number=CLUT_version_number;
 583
 584                 memset(clut->entries_2bit, 0, sizeof(clut->entries_2bit));
 585                 memset(clut->entries_4bit, 0, sizeof(clut->entries_4bit));
 586                 memset(clut->entries_8bit, 0, sizeof(clut->entries_8bit));
 587
 588                 //eDebug("new clut");
 589                 while (processed_length < segment_length)
 590                 {
 591                         int CLUT_entry_id, entry_CLUT_flag, full_range;
 592                         int v_Y, v_Cr, v_Cb, v_T;
 593
 594                         CLUT_entry_id = *segment++;
 595                         full_range = *segment & 1;
 596                         entry_CLUT_flag = (*segment++ & 0xE0) >> 5;
 597                         processed_length += 2;
 598
 599                         if (full_range)
 600                         {
 601                                 v_Y  = *segment++;
 602                                 v_Cr = *segment++;
 603                                 v_Cb = *segment++;
 604                                 v_T  = *segment++;
 605                                 processed_length += 4;
 606                         } else
 607                         {
 608                                 v_Y   = *segment & 0xFC;
 609                                 v_Cr  = (*segment++ & 3) << 6;
 610                                 v_Cr |= (*segment & 0xC0) >> 2;
 611                                 v_Cb  = (*segment & 0x3C) << 2;
 612                                 v_T   = (*segment++ & 3) << 6;
 613                                 processed_length += 2;
 614                         }
 615
 616                         if (entry_CLUT_flag & 1) // 8bit
 617                         {
 618                                 ASSERT(CLUT_entry_id < 256);
 619                                 clut->entries_8bit[CLUT_entry_id].Y = v_Y;
 620                                 clut->entries_8bit[CLUT_entry_id].Cr = v_Cr;
 621                                 clut->entries_8bit[CLUT_entry_id].Cb = v_Cb;
 622                                 clut->entries_8bit[CLUT_entry_id].T = v_T;
 623                                 clut->entries_8bit[CLUT_entry_id].valid = 1;
 624                         }
 625                         if (entry_CLUT_flag & 2) // 4bit
 626                         {
 627                                 ASSERT(CLUT_entry_id < 16);
 628                                 clut->entries_4bit[CLUT_entry_id].Y = v_Y;
 629                                 clut->entries_4bit[CLUT_entry_id].Cr = v_Cr;
 630                                 clut->entries_4bit[CLUT_entry_id].Cb = v_Cb;
 631                                 clut->entries_4bit[CLUT_entry_id].T = v_T;
 632                                 clut->entries_4bit[CLUT_entry_id].valid = 1;
 633                         }
 634                         if (entry_CLUT_flag & 4) // 2bit
 635                         {
 636                                 ASSERT(CLUT_entry_id < 4);
 637                                 clut->entries_2bit[CLUT_entry_id].Y = v_Y;
 638                                 clut->entries_2bit[CLUT_entry_id].Cr = v_Cr;
 639                                 clut->entries_2bit[CLUT_entry_id].Cb = v_Cb;
 640                                 clut->entries_2bit[CLUT_entry_id].T = v_T;
 641                                 clut->entries_2bit[CLUT_entry_id].valid = 1;
 642                         }
 643                         //eDebug("  %04x %02x %02x %02x %02x", CLUT_entry_id, v_Y, v_Cb, v_Cr, v_T);
 644                 }
 645                 break;
 646         }
 647         case 0x13: // object data segment
 648         {
 649                 int object_id, object_version_number, object_coding_method, non_modifying_color_flag;
 650
 651                 object_id  = *segment++ << 8;
 652                 object_id |= *segment++;
 653                 processed_length += 2;
 654
 655                 object_version_number = *segment >> 4;
 656                 object_coding_method  = (*segment >> 2) & 3;
 657                 non_modifying_color_flag = (*segment++ >> 1) & 1;
 658                 processed_length++;
 659
 660                 //eDebug("object id %04x, version %d, object_coding_method %d (page_id %d)", object_id, object_version_number, object_coding_method, page_id);
 661
 662                 if (object_coding_method == 0)
 663                 {
 664                         int top_field_data_blocklength, bottom_field_data_blocklength;
 665                         int i, line, linep;
 666
 667                         top_field_data_blocklength  = *segment++ << 8;
 668                         top_field_data_blocklength |= *segment++;
 669
 670                         bottom_field_data_blocklength  = *segment++ << 8;
 671                         bottom_field_data_blocklength |= *segment++;
 672                         //eDebug("%d / %d bytes", top_field_data_blocklength, bottom_field_data_blocklength);
 673                         processed_length += 4;
 674
 675                         i = 0;
 676                         line = 0;
 677                         linep = 0;
 678                         while (i < top_field_data_blocklength)
 679                         {
 680                                 int len;
 681                                 len = subtitle_process_pixel_data(page, object_id, &line, &linep, segment);
 682                                 if (len < 0)
 683                                         return -1;
 684                                 segment += len;
 685                                 processed_length += len;
 686                                 i += len;
 687                         }
 688
 689                         line = 1;
 690                         linep = 0;
 691
 692                         if (bottom_field_data_blocklength)
 693                         {
 694                                 i = 0;
 695                                 while (i < bottom_field_data_blocklength)
 696                                 {
 697                                         int len;
 698                                         len = subtitle_process_pixel_data(page, object_id, &line, &linep, segment);
 699                                         if (len < 0)
 700                                                 return -1;
 701                                         segment += len;
 702                                         processed_length += len;
 703                                         i += len;
 704                                 }
 705                         }
 706                         else if (top_field_data_blocklength)
 707                                 eDebug("!!!! unimplemented: no bottom field! (%d : %d)", top_field_data_blocklength, bottom_field_data_blocklength);
 708
 709                         if ((top_field_data_blocklength + bottom_field_data_blocklength) & 1)
 710                         {
 711                                 segment++; processed_length++;
 712                         }
 713                 }
 714                 else if (object_coding_method == 1)
 715                         eDebug("---- object_coding_method 1 unsupported!");
 716
 717                 break;
 718         }
 719         case 0x80: // end of display set segment
 720         {
 721 //              eDebug("end of display set segment");
 722                 subtitle_redraw_all();
 723         }
 724         case 0xFF: // stuffing
 725                 break;
 726         default:
 727                 eDebug("unhandled segment type %02x", segment_type);
 728         }
 729
 730         return segment_length + 6;
 731 }
 732
 733 void eDVBSubtitleParser::subtitle_process_pes(__u8 *pkt, int len)
 734 {
 735 //      eDebug("subtitle_process_pes");
 736         if (!extract_pts(m_show_time, pkt))
 737         {
 738                 pkt += 6; len -= 6;
 739                 // skip PES header
 740                 pkt++; len--;
 741                 pkt++; len--;
 742
 743                 int hdr_len = *pkt++; len--;
 744
 745                 pkt+=hdr_len; len-=hdr_len;
 746
 747                 if (*pkt != 0x20)
 748                 {
 749                         //eDebug("data identifier is 0x%02x, but not 0x20", *pkt);
 750                         return;
 751                 }
 752                 pkt++; len--; // data identifier
 753                 *pkt++; len--; // stream id;
 754
 755                 if (len <= 0)
 756                 {
 757                         //eDebug("no data left (%d)", len);
 758                         return;
 759                 }
 760
 761                 while (len && *pkt == 0x0F)
 762                 {
 763                         int l = subtitle_process_segment(pkt);
 764                         if (l < 0)
 765                                 break;
 766                         pkt += l;
 767                         len -= l;
 768                 }
 769         //      if (len && *pkt != 0xFF)
 770         //              eDebug("strange data at the end");
 771         }
 772         else
 773                 eDebug("dvb subtitle packet without PTS.. ignore!!");
 774 }
 775
 776 void eDVBSubtitleParser::subtitle_redraw_all()
 777 {
 778 #if 1
 779         subtitle_page *page = m_pages;
 780         while(page)
 781         {
 782                 subtitle_redraw(page->page_id);
 783                 page = page->next;
 784         }
 785 #else
 786         subtitle_page *page = m_pages;
 787         //eDebug("----------- end of display set");
 788         //eDebug("active pages:");
 789         while (page)
 790         {
 791                 //eDebug("  page_id %02x", page->page_id);
 792                 //eDebug("  page_version_number: %d", page->page_version_number);
 793                 //eDebug("  active regions:");
 794                 {
 795                         subtitle_page_region *region = page->page_regions;
 796                         while (region)
 797                         {
 798                                 //eDebug("    region_id: %04x", region->region_id);
 799                                 //eDebug("    region_horizontal_address: %d", region->region_horizontal_address);
 800                                 //eDebug("    region_vertical_address: %d", region->region_vertical_address);
 801
 802                                 region = region->next;
 803                         }
 804                 }
 805
 806                 subtitle_redraw(page->page_id);
 807                 //eDebug("defined regions:");
 808                 subtitle_region *region = page->regions;
 809                 while (region)
 810                 {
 811                         //eDebug("  region_id %04x, version %d, %dx%d", region->region_id, region->region_version_number, region->region_width, region->region_height);
 812
 813                         subtitle_region_object *object = region->region_objects;
 814                         while (object)
 815                         {
 816                                 //eDebug("  object %02x, type %d, %d:%d", object->object_id, object->object_type, object->object_horizontal_position, object->object_vertical_position);
 817                                 object = object->next;
 818                         }
 819                         region = region->next;
 820                 }
 821                 page = page->next;
 822         }
 823 #endif
 824 }
 825
 826 void eDVBSubtitleParser::subtitle_reset()
 827 {
 828         while (subtitle_page *page = m_pages)
 829         {
 830                         /* free page regions */
 831                 while (page->page_regions)
 832                 {
 833                         subtitle_page_region *p = page->page_regions->next;
 834                         delete page->page_regions;
 835                         page->page_regions = p;
 836                 }
 837                         /* free regions */
 838                 while (page->regions)
 839                 {
 840                         subtitle_region *region = page->regions;
 841
 842                         while (region->region_objects)
 843                         {
 844                                 subtitle_region_object *obj = region->region_objects;
 845                                 region->region_objects = obj->next;
 846                                 delete obj;
 847                         }
 848
 849                         if (region->region_buffer)
 850                         {
 851 //                              eDebug("no more need of region_buffer 2 %p", &(*region->region_buffer));
 852                                 region->region_buffer=0;
 853                         }
 854
 855                         page->regions = region->next;
 856                         delete region;
 857                 }
 858
 859                         /* free CLUTs */
 860                 while (page->cluts)
 861                 {
 862                         subtitle_clut *clut = page->cluts;
 863                         page->cluts = clut->next;
 864                         delete clut;
 865                 }
 866
 867                 m_pages = page->next;
 868                 delete page;
 869         }
 870 }
 871
 872 void eDVBSubtitleParser::subtitle_redraw(int page_id)
 873 {
 874         subtitle_page *page = m_pages;
 875
 876 //      eDebug("displaying page id %d", page_id);
 877
 878         while (page)
 879         {
 880                 if (page->page_id == page_id)
 881                         break;
 882                 page = page->next;
 883         }
 884         if (!page)
 885         {
 886                 //eDebug("page not found");
 887                 return;
 888         }
 889
 890         //eDebug("iterating regions..");
 891                 /* iterate all regions in this pcs */
 892         subtitle_page_region *region = page->page_regions;
 893
 894         eDVBSubtitlePage Page;
 895         Page.m_show_time = m_show_time;
 896         for (; region; region=region->next)
 897         {
 898 //              eDebug("region %d", region->region_id);
 899                         /* find corresponding region */
 900                 subtitle_region *reg = page->regions;
 901                 while (reg)
 902                 {
 903                         if (reg->region_id == region->region_id)
 904                                 break;
 905                         reg = reg->next;
 906                 }
 907                 if (reg)
 908                 {
 909                         if (reg->committed)
 910                                 continue;
 911 //                      eDebug("copy region %d to %d, %d", region->region_id, region->region_horizontal_address, region->region_vertical_address);
 912
 913                         int x0 = region->region_horizontal_address;
 914                         int y0 = region->region_vertical_address;
 915
 916                         if ((x0 < 0) || (y0 < 0))
 917                         {
 918 //                              eDebug("x0 %d, y0 %d",
 919 //                                      x0, y0);
 920                                 continue;
 921                         }
 922
 923                         /* find corresponding clut */
 924                         subtitle_clut *clut = page->cluts;
 925                         while (clut)
 926                         {
 927                         //eDebug("have %d, want %d", clut->clut_id, main_clut_id);
 928                                 if (clut->clut_id == reg->clut_id)
 929                                         break;
 930                                 clut = clut->next;
 931                         }
 932
 933                         int clut_size = reg->region_buffer->surface->clut.colors = reg->region_depth == subtitle_region::bpp2 ?
 934                                 4 : reg->region_depth == subtitle_region::bpp4 ? 16 : 256;
 935
 936                         reg->region_buffer->surface->clut.data = new gRGB[clut_size];
 937 //                      eDebug("create clut data for region_buffer %p", &(*reg->region_buffer));
 938
 939                         gRGB *palette = reg->region_buffer->surface->clut.data;
 940
 941                         subtitle_clut_entry *entries=0;
 942                         switch(reg->region_depth)
 943                         {
 944                                 case subtitle_region::bpp2:
 945 //                                      eDebug("2BPP");
 946                                         entries = clut->entries_2bit;
 947                                         memset(palette, 0, 4*sizeof(gRGB));
 948                                         palette[0].a = 0xFF;
 949                                         palette[2].r = palette[2].g = palette[2].b = 0xFF;
 950                                         palette[3].r = palette[3].g = palette[3].b = 0x80;
 951                                         break;
 952                                 case subtitle_region::bpp4:
 953 //                                      eDebug("4BPP");
 954                                         entries = clut->entries_4bit;
 955                                         memset(palette, 0, 16*sizeof(gRGB));
 956                                         for (int i=0; i < 16; ++i)
 957                                         {
 958                                                 if (!i)
 959                                                         palette[i].a = 0xFF;
 960                                                 else if (i & 1)
 961                                                 {
 962                                                         if (i & 8)
 963                                                                 palette[i].r = 0x80;
 964                                                         if (i & 4)
 965                                                                 palette[i].g = 0x80;
 966                                                         if (i & 2)
 967                                                                 palette[i].b = 0x80;
 968                                                 }
 969                                                 else
 970                                                 {
 971                                                         if (i & 8)
 972                                                                 palette[i].r = 0xFF;
 973                                                         if (i & 4)
 974                                                                 palette[i].g = 0xFF;
 975                                                         if (i & 2)
 976                                                                 palette[i].b = 0xFF;
 977                                                 }
 978                                         }
 979                                         break;
 980                                 case subtitle_region::bpp8:
 981 //                                      eDebug("8BPP");
 982                                         entries = clut->entries_8bit;
 983                                         memset(palette, 0, 16*sizeof(gRGB));
 984                                         for (int i=0; i < 256; ++i)
 985                                         {
 986                                                 switch (i & 17)
 987                                                 {
 988                                                 case 0: // b1 == 0 && b5 == 0
 989                                                         if (!(i & 14)) // b2 == 0 && b3 == 0 && b4 == 0
 990                                                         {
 991                                                                 if (!(i & 224)) // b6 == 0 && b7 == 0 && b8 == 0
 992                                                                         palette[i].a = 0xFF;
 993                                                                 else
 994                                                                 {
 995                                                                         if (i & 128) // R = 100% x b8
 996                                                                                 palette[i].r = 0xFF;
 997                                                                         if (i & 64) // G = 100% x b7
 998                                                                                 palette[i].g = 0xFF;
 999                                                                         if (i & 32) // B = 100% x b6
1000                                                                                 palette[i].b = 0xFF;
1001                                                                         palette[i].a = 0xBF; // T = 75%
1002                                                                 }
1003                                                                 break;
1004                                                         }
1005                                                         // fallthrough !!
1006                                                 case 16: // b1 == 0 && b5 == 1
1007                                                         if (i & 128) // R = 33% x b8
1008                                                                 palette[i].r = 0x55;
1009                                                         if (i & 64) // G = 33% x b7
1010                                                                 palette[i].g = 0x55;
1011                                                         if (i & 32) // B = 33% x b6
1012                                                                 palette[i].b = 0x55;
1013                                                         if (i & 8) // R + 66,7% x b4
1014                                                                 palette[i].r += 0xAA;
1015                                                         if (i & 4) // G + 66,7% x b3
1016                                                                 palette[i].g += 0xAA;
1017                                                         if (i & 2) // B + 66,7% x b2
1018                                                                 palette[i].b += 0xAA;
1019                                                         if (i & 16) // needed for fall through from case 0!!
1020                                                                 palette[i].a = 0x80; // T = 50%
1021                                                         break;
1022                                                 case 1: // b1 == 1 && b5 == 0
1023                                                         palette[i].r =
1024                                                         palette[i].g =
1025                                                         palette[i].b = 0x80; // 50%
1026                                                         // fall through!!
1027                                                 case 17: // b1 == 1 && b5 == 1
1028                                                         if (i & 128) // R += 16.7% x b8
1029                                                                 palette[i].r += 0x2A;
1030                                                         if (i & 64) // G += 16.7% x b7
1031                                                                 palette[i].g += 0x2A;
1032                                                         if (i & 32) // B += 16.7% x b6
1033                                                                 palette[i].b += 0x2A;
1034                                                         if (i & 8) // R += 33% x b4
1035                                                                 palette[i].r += 0x55;
1036                                                         if (i & 4) // G += 33% x b3
1037                                                                 palette[i].g += 0x55;
1038                                                         if (i & 2) // B += 33% x b2
1039                                                                 palette[i].b += 0x55;
1040                                                         break;
1041                                                 }
1042                                         }
1043                                         break;
1044                         }
1045
1046                         if (clut)
1047                         {
1048                                 for (int i=0; i<clut_size; ++i)
1049                                 {
1050                                         if (entries[i].valid)
1051                                         {
1052                                                 int y = entries[i].Y,
1053                                                         cr = entries[i].Cr,
1054                                                         cb = entries[i].Cb;
1055                                                 if (y > 0)
1056                                                 {
1057                                                         y -= 16;
1058                                                         cr -= 128;
1059                                                         cb -= 128;
1060                                                         palette[i].r = MAX(MIN(((298 * y            + 460 * cr) / 256), 255), 0);
1061                                                         palette[i].g = MAX(MIN(((298 * y -  55 * cb - 137 * cr) / 256), 255), 0);
1062                                                         palette[i].b = MAX(MIN(((298 * y + 543 * cb           ) / 256), 255), 0);
1063                                                         palette[i].a = (entries[i].T) & 0xFF;
1064 //                                                      eDebug("override clut entry %d RGBA %02x%02x%02x%02x", i,
1065 //                                                              palette[i].r, palette[i].g, palette[i].b, palette[i].a);
1066                                                 }
1067                                                 else
1068                                                 {
1069 //                                                      eDebug("mist %d", i);
1070                                                         palette[i].r = 0;
1071                                                         palette[i].g = 0;
1072                                                         palette[i].b = 0;
1073                                                         palette[i].a = 0xFF;
1074                                                 }
1075                                         }
1076                                 }
1077                         }
1078
1079 //                      eDebug("commit region_buffer %p", &(*reg->region_buffer));
1080                         eDVBSubtitleRegion Region;
1081                         Region.m_pixmap = reg->region_buffer;
1082                         Region.m_position.setX(x0);
1083                         Region.m_position.setY(y0);
1084                         Page.m_regions.push_back(Region);
1085                         reg->committed = true;
1086                 }
1087                 else
1088                         eDebug("region not found");
1089         }
1090         m_new_subtitle_page(Page);
1091         Page.m_regions.clear();
1092 //      eDebug("page timeout is %d", page->page_time_out);
1093 //      Page.m_show_time += (page->page_time_out * 90000);
1094 //      m_new_subtitle_page(Page);
1095         //eDebug("schon gut.");
1096 }
1097
1098 DEFINE_REF(eDVBSubtitleParser);
1099
1100 eDVBSubtitleParser::eDVBSubtitleParser(iDVBDemux *demux)
1101         :m_pages(0)
1102 {
1103         setStreamID(0xBD);
1104
1105         if (demux->createPESReader(eApp, m_pes_reader))
1106                 eDebug("failed to create dvb subtitle PES reader!");
1107         else
1108                 m_pes_reader->connectRead(slot(*this, &eDVBSubtitleParser::processData), m_read_connection);
1109 }
1110
1111 eDVBSubtitleParser::~eDVBSubtitleParser()
1112 {
1113         subtitle_reset();
1114 }
1115
1116 int eDVBSubtitleParser::stop()
1117 {
1118         if (m_pes_reader)
1119         {
1120                 eDebug("disable dvb subtitles");
1121                 return m_pes_reader->stop();
1122         }
1123         return -1;
1124 }
1125
1126 int eDVBSubtitleParser::start(int pid, int composition_page_id, int ancillary_page_id)
1127 {
1128         if (m_pes_reader)
1129         {
1130                 eDebug("start dvb subtitles on pid 0x%04x with composition_page_id %d and ancillary_page_id %d",
1131                         pid, composition_page_id, ancillary_page_id);
1132                 m_composition_page_id = composition_page_id;
1133                 m_ancillary_page_id = ancillary_page_id;
1134                 return m_pes_reader->start(pid);
1135         }
1136         return -1;
1137 }
1138
1139 void eDVBSubtitleParser::connectNewPage(const Slot1<void, const eDVBSubtitlePage&> &slot, ePtr<eConnection> &connection)
1140 {
1141         connection = new eConnection(this, m_new_subtitle_page.connect(slot));
1142 }