git.sesse.net Git - vlc/blob - plugins/dvd/input_dvd.c

   1 /*****************************************************************************
   2  * input_dvd.c: DVD raw reading plugin.
   3  * ---
   4  * This plugins should handle all the known specificities of the DVD format,
   5  * especially the 2048 bytes logical block size.
   6  * It depends on:
   7  *  -input_netlist used to read packets
   8  *  -dvd_ifo for ifo parsing and analyse
   9  *  -dvd_css for unscrambling
  10  *  -dvd_udf to find files
  11  *****************************************************************************
  12  * Copyright (C) 1998-2001 VideoLAN
  13  * $Id: input_dvd.c,v 1.14 2001/02/19 03:12:26 stef Exp $
  14  *
  15  * Author: Stéphane Borel <stef@via.ecp.fr>
  16  *
  17  * This program is free software; you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation; either version 2 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  30  *****************************************************************************/
  31
  32 /*****************************************************************************
  33  * Preamble
  34  *****************************************************************************/
  35 #include "defs.h"
  36
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <unistd.h>
  40 #include <netinet/in.h>
  41
  42 #include <fcntl.h>
  43 #include <sys/types.h>
  44 #include <sys/uio.h>
  45
  46 #include <string.h>
  47 #include <errno.h>
  48 #include <malloc.h>
  49
  50 #include "config.h"
  51 #include "common.h"
  52 #include "threads.h"
  53 #include "mtime.h"
  54 #include "tests.h"
  55
  56 #include "intf_msg.h"
  57
  58 #include "main.h"
  59
  60 #include "stream_control.h"
  61 #include "input_ext-intf.h"
  62 #include "input_ext-dec.h"
  63
  64 #include "input.h"
  65 #include "input_netlist.h"
  66
  67 #include "dvd_ifo.h"
  68 #include "dvd_css.h"
  69 #include "input_dvd.h"
  70 #include "mpeg_system.h"
  71
  72 #include "debug.h"
  73
  74 #include "modules.h"
  75
  76 /*****************************************************************************
  77  * Local tables
  78  *****************************************************************************/
  79 static struct
  80 {
  81         char    p_code[3];
  82     char    p_lang_long[20];
  83 } lang_tbl[] =
  84     {
  85
  86     /* The ISO 639 language codes.
  87      * Language names with * prefix are not spelled in their own language
  88      */
  89         {"  ", "Not Specified"},
  90         {"aa", "*Afar"},
  91         {"ab", "*Abkhazian"},
  92         {"af", "*Afrikaans"},
  93         {"am", "*Amharic"},
  94         {"ar", "*Arabic"},
  95         {"as", "*Assamese"},
  96         {"ay", "*Aymara"},
  97         {"az", "*Azerbaijani"},
  98         {"ba", "*Bashkir"},
  99         {"be", "*Byelorussian"},
 100         {"bg", "*Bulgarian"},
 101         {"bh", "*Bihari"},
 102         {"bi", "*Bislama"},
 103         {"bn", "*Bengali; Bangla"},
 104         {"bo", "*Tibetan"},
 105         {"br", "*Breton"},
 106         {"ca", "*Catalan"},
 107         {"co", "*Corsican"},
 108         {"cs", "*Czech(Ceske)"},
 109         {"cy", "*Welsh"},
 110         {"da", "Dansk"},
 111         {"de", "Deutsch"},
 112         {"dz", "*Bhutani"},
 113         {"el", "*Greek"},
 114         {"en", "English"},
 115         {"eo", "*Esperanto"},
 116         {"es", "Espanol"},
 117         {"et", "*Estonian"},
 118         {"eu", "*Basque"},
 119         {"fa", "*Persian"},
 120         {"fi", "Suomi"},
 121         {"fj", "*Fiji"},
 122         {"fo", "*Faroese"},
 123         {"fr", "Francais"},
 124         {"fy", "*Frisian"},
 125         {"ga", "*Irish"},
 126         {"gd", "*Scots Gaelic"},
 127         {"gl", "*Galician"},
 128         {"gn", "*Guarani"},
 129         {"gu", "*Gujarati"},
 130         {"ha", "*Hausa"},
 131         {"he", "*Hebrew"},                              // formerly iw
 132         {"hi", "*Hindi"},
 133         {"hr", "Hrvatski"},                             // Croatian
 134         {"hu", "Magyar"},
 135         {"hy", "*Armenian"},
 136         {"ia", "*Interlingua"},
 137         {"id", "*Indonesian"},                          // formerly in
 138         {"ie", "*Interlingue"},
 139         {"ik", "*Inupiak"},
 140         {"in", "*Indonesian"},                          // replaced by id
 141         {"is", "Islenska"},
 142         {"it", "Italiano"},
 143         {"iu", "*Inuktitut"},
 144         {"iw", "*Hebrew"},                              // replaced by he
 145         {"ja", "*Japanese"},
 146         {"ji", "*Yiddish"},                             // replaced by yi
 147         {"jw", "*Javanese"},
 148         {"ka", "*Georgian"},
 149         {"kk", "*Kazakh"},
 150         {"kl", "*Greenlandic"},
 151         {"km", "*Cambodian"},
 152         {"kn", "*Kannada"},
 153         {"ko", "*Korean"},
 154         {"ks", "*Kashmiri"},
 155         {"ku", "*Kurdish"},
 156         {"ky", "*Kirghiz"},
 157         {"la", "*Latin"},
 158         {"ln", "*Lingala"},
 159         {"lo", "*Laothian"},
 160         {"lt", "*Lithuanian"},
 161         {"lv", "*Latvian, Lettish"},
 162         {"mg", "*Malagasy"},
 163         {"mi", "*Maori"},
 164         {"mk", "*Macedonian"},
 165         {"ml", "*Malayalam"},
 166         {"mn", "*Mongolian"},
 167         {"mo", "*Moldavian"},
 168         {"mr", "*Marathi"},
 169         {"ms", "*Malay"},
 170         {"mt", "*Maltese"},
 171         {"my", "*Burmese"},
 172         {"na", "*Nauru"},
 173         {"ne", "*Nepali"},
 174         {"nl", "Nederlands"},
 175         {"no", "Norsk"},
 176         {"oc", "*Occitan"},
 177         {"om", "*(Afan) Oromo"},
 178         {"or", "*Oriya"},
 179         {"pa", "*Punjabi"},
 180         {"pl", "*Polish"},
 181         {"ps", "*Pashto, Pushto"},
 182         {"pt", "Portugues"},
 183         {"qu", "*Quechua"},
 184         {"rm", "*Rhaeto-Romance"},
 185         {"rn", "*Kirundi"},
 186         {"ro", "*Romanian"},
 187         {"ru", "*Russian"},
 188         {"rw", "*Kinyarwanda"},
 189         {"sa", "*Sanskrit"},
 190         {"sd", "*Sindhi"},
 191         {"sg", "*Sangho"},
 192         {"sh", "*Serbo-Croatian"},
 193         {"si", "*Sinhalese"},
 194         {"sk", "*Slovak"},
 195         {"sl", "*Slovenian"},
 196         {"sm", "*Samoan"},
 197         {"sn", "*Shona"},
 198         {"so", "*Somali"},
 199         {"sq", "*Albanian"},
 200         {"sr", "*Serbian"},
 201         {"ss", "*Siswati"},
 202         {"st", "*Sesotho"},
 203         {"su", "*Sundanese"},
 204         {"sv", "Svenska"},
 205         {"sw", "*Swahili"},
 206         {"ta", "*Tamil"},
 207         {"te", "*Telugu"},
 208         {"tg", "*Tajik"},
 209         {"th", "*Thai"},
 210         {"ti", "*Tigrinya"},
 211         {"tk", "*Turkmen"},
 212         {"tl", "*Tagalog"},
 213         {"tn", "*Setswana"},
 214         {"to", "*Tonga"},
 215         {"tr", "*Turkish"},
 216         {"ts", "*Tsonga"},
 217         {"tt", "*Tatar"},
 218         {"tw", "*Twi"},
 219         {"ug", "*Uighur"},
 220         {"uk", "*Ukrainian"},
 221         {"ur", "*Urdu"},
 222         {"uz", "*Uzbek"},
 223         {"vi", "*Vietnamese"},
 224         {"vo", "*Volapuk"},
 225         {"wo", "*Wolof"},
 226         {"xh", "*Xhosa"},
 227         {"yi", "*Yiddish"},                             // formerly ji
 228         {"yo", "*Yoruba"},
 229         {"za", "*Zhuang"},
 230         {"zh", "*Chinese"},
 231         {"zu", "*Zulu"},
 232         {"\0", ""}
 233     };
 234
 235 /*****************************************************************************
 236  * Local prototypes
 237  *****************************************************************************/
 238 static int  DVDProbe    ( probedata_t *p_data );
 239 static int  DVDCheckCSS ( struct input_thread_s * );
 240 static int  DVDRead     ( struct input_thread_s *, data_packet_t ** );
 241 static void DVDInit     ( struct input_thread_s * );
 242 static void DVDEnd      ( struct input_thread_s * );
 243 static void DVDSeek     ( struct input_thread_s *, off_t );
 244 static int  DVDRewind   ( struct input_thread_s * );
 245
 246 /*****************************************************************************
 247  * Functions exported as capabilities. They are declared as static so that
 248  * we don't pollute the namespace too much.
 249  *****************************************************************************/
 250 void input_getfunctions( function_list_t * p_function_list )
 251 {
 252 #define input p_function_list->functions.input
 253     p_function_list->pf_probe = DVDProbe;
 254     input.pf_init             = DVDInit;
 255     input.pf_open             = input_FileOpen;
 256     input.pf_close            = input_FileClose;
 257     input.pf_end              = DVDEnd;
 258     input.pf_read             = DVDRead;
 259     input.pf_demux            = input_DemuxPS;
 260     input.pf_new_packet       = input_NetlistNewPacket;
 261     input.pf_new_pes          = input_NetlistNewPES;
 262     input.pf_delete_packet    = input_NetlistDeletePacket;
 263     input.pf_delete_pes       = input_NetlistDeletePES;
 264     input.pf_rewind           = DVDRewind;
 265     input.pf_seek             = DVDSeek;
 266 #undef input
 267 }
 268
 269 /*
 270  * Local tools to decode some data in ifo
 271  */
 272
 273 /*****************************************************************************
 274  * Language: gives the long language name from the two-letters ISO-639 code
 275  *****************************************************************************/
 276 static char * Language( char * p_code )
 277 {
 278     int     i = 0;
 279
 280     while( !memcmp( lang_tbl[i].p_code, p_code, 2 ) && lang_tbl[i].p_lang_long )
 281     {
 282         i++;
 283     }
 284
 285     return lang_tbl[i].p_lang_long;
 286 }
 287
 288 /*
 289  * Data reading functions
 290  */
 291
 292 /*****************************************************************************
 293  * DVDProbe: verifies that the stream is a PS stream
 294  *****************************************************************************/
 295 static int DVDProbe( probedata_t *p_data )
 296 {
 297     input_thread_t * p_input = (input_thread_t *)p_data;
 298
 299     char * psz_name = p_input->p_source;
 300     int i_handle;
 301     int i_score = 5;
 302
 303     if( TestMethod( INPUT_METHOD_VAR, "dvd" ) )
 304     {
 305         return( 999 );
 306     }
 307
 308     if( ( strlen(psz_name) > 4 ) && !strncasecmp( psz_name, "dvd:", 4 ) )
 309     {
 310         /* If the user specified "dvd:" then it's probably a DVD */
 311         i_score = 100;
 312         psz_name += 4;
 313     }
 314
 315     i_handle = open( psz_name, 0 );
 316     if( i_handle == -1 )
 317     {
 318         return( 0 );
 319     }
 320     close( i_handle );
 321
 322     return( i_score );
 323 }
 324
 325 /*****************************************************************************
 326  * DVDCheckCSS: check the stream
 327  *****************************************************************************/
 328 static int DVDCheckCSS( input_thread_t * p_input )
 329 {
 330 #if defined( HAVE_SYS_DVDIO_H ) || defined( LINUX_DVD )
 331     return CSSTest( p_input->i_handle );
 332 #else
 333     /* DVD ioctls unavailable.
 334      * FIXME: Check the stream to see whether it is encrypted or not
 335      * to give and accurate error message */
 336     return 0;
 337 #endif
 338 }
 339
 340 /*****************************************************************************
 341  * DVDSetRegion: initialize input data for title x, chapter y.
 342  * It should be called for each user navigation request, and to change
 343  * audio or sub-picture streams.
 344  * ---
 345  * Take care that i_title and i_chapter start from 0.
 346  *****************************************************************************/
 347 static int DVDSetRegionParameters( input_thread_t * p_input,
 348                                    int i_title, int i_chapter,
 349                                    int i_audio, int i_spu )
 350 {
 351     thread_dvd_data_t *  p_method;
 352     off_t                i_start;
 353     off_t                i_size;
 354     pgc_t *              p_pgc;
 355     int                  i_start_cell;
 356     int                  i_end_cell;
 357     int                  i_index;
 358     int                  i_cell;
 359
 360
 361     p_method = (thread_dvd_data_t*)p_input->p_plugin_data;
 362
 363     /* Set selected title start and size */
 364     p_input->stream.i_title = i_title;
 365
 366     p_pgc = &p_method->ifo.p_vts[i_title].pgci_ti.p_srp[0].pgc;
 367
 368     /* Find cell index in Program chain */
 369     i_index = p_pgc->prg_map.pi_entry_cell[i_chapter] - 1;
 370
 371     /* Search for cell_index in cell adress_table */
 372     i_cell = 0;
 373     while( p_pgc->p_cell_pos_inf[i_index].i_vob_id >
 374            p_method->ifo.p_vts[i_title].c_adt.p_cell_inf[i_cell].i_vob_id )
 375     {
 376         i_cell++;
 377     }
 378     while( p_pgc->p_cell_pos_inf[i_index].i_cell_id >
 379            p_method->ifo.p_vts[i_title].c_adt.p_cell_inf[i_cell].i_cell_id )
 380     {
 381         i_cell++;
 382     }
 383     i_start_cell = i_cell;
 384     i_end_cell = i_start_cell + p_pgc->i_cell_nb - 1;
 385
 386     intf_WarnMsg( 2, "DVD: Start cell: %d End Cell: %d",
 387                                             i_start_cell, i_end_cell );
 388
 389     p_method->i_start_cell = i_start_cell;
 390     p_method->i_end_cell = i_end_cell;
 391
 392     /* start is : beginning of vts + offset to vobs + offset to vob x */
 393     i_start = p_method->ifo.p_vts[i_title].i_pos + DVD_LB_SIZE *
 394             ( p_method->ifo.p_vts[i_title].mat.i_tt_vobs_ssector +
 395               p_method->ifo.p_vts[i_title].c_adt.p_cell_inf[i_start_cell].i_ssector );
 396     p_method->i_start_byte = i_start;
 397
 398     i_start = lseek( p_input->i_handle, i_start, SEEK_SET );
 399     intf_WarnMsg( 3, "DVD: VOBstart at: %lld", i_start );
 400
 401     i_size = (off_t)
 402         ( p_method->ifo.p_vts[i_title].c_adt.p_cell_inf[i_end_cell].i_esector -
 403           p_method->ifo.p_vts[i_title].c_adt.p_cell_inf[i_start_cell].i_ssector + 1 )
 404         *DVD_LB_SIZE;
 405     intf_WarnMsg( 3, "DVD: stream size: %lld", i_size );
 406
 407     if( p_input->stream.b_seekable )
 408     {
 409         stream_ps_data_t * p_demux_data =
 410              (stream_ps_data_t *)p_input->stream.pp_programs[0]->p_demux_data;
 411
 412         /* Pre-parse the stream to gather stream_descriptor_t. */
 413         p_input->stream.pp_programs[0]->b_is_ok = 0;
 414         p_demux_data->i_PSM_version = EMPTY_PSM_VERSION;
 415
 416         while( !p_input->b_die && !p_input->b_error
 417                 && !p_demux_data->b_has_PSM )
 418         {
 419             int                 i_result, i;
 420             data_packet_t *     pp_packets[INPUT_READ_ONCE];
 421
 422             i_result = DVDRead( p_input, pp_packets );
 423             if( i_result == 1 )
 424             {
 425                 /* EOF */
 426                 vlc_mutex_lock( &p_input->stream.stream_lock );
 427                 p_input->stream.pp_programs[0]->b_is_ok = 1;
 428                 vlc_mutex_unlock( &p_input->stream.stream_lock );
 429                 break;
 430             }
 431             if( i_result == -1 )
 432             {
 433                 p_input->b_error = 1;
 434                 break;
 435             }
 436
 437             for( i = 0; i < INPUT_READ_ONCE && pp_packets[i] != NULL; i++ )
 438             {
 439                 /* FIXME: use i_p_config_t */
 440                 input_ParsePS( p_input, pp_packets[i] );
 441                 input_NetlistDeletePacket( p_input->p_method_data,
 442                                            pp_packets[i] );
 443             }
 444
 445             /* File too big. */
 446             if( p_input->stream.i_tell > INPUT_PREPARSE_LENGTH )
 447             {
 448                 break;
 449             }
 450         }
 451         lseek( p_input->i_handle, i_start, SEEK_SET );
 452         vlc_mutex_lock( &p_input->stream.stream_lock );
 453
 454         /* i_tell is an indicator from the beginning of the stream,
 455          * not of the DVD */
 456         p_input->stream.i_tell = 0;
 457
 458         if( p_demux_data->b_has_PSM )
 459         {
 460             /* (The PSM decoder will care about spawning the decoders) */
 461             p_input->stream.pp_programs[0]->b_is_ok = 1;
 462         }
 463 #ifdef AUTO_SPAWN
 464         else
 465         {
 466             /* (We have to do it ourselves) */
 467             int                 i_es;
 468
 469             /* FIXME: we should do multiple passes in case an audio type
 470              * is not present */
 471             for( i_es = 0;
 472                  i_es < p_input->stream.pp_programs[0]->i_es_number;
 473                  i_es++ )
 474             {
 475 #define p_es p_input->stream.pp_programs[0]->pp_es[i_es]
 476                 switch( p_es->i_type )
 477                 {
 478                     case MPEG1_VIDEO_ES:
 479                     case MPEG2_VIDEO_ES:
 480                         input_SelectES( p_input, p_es );
 481                         break;
 482
 483                     case MPEG1_AUDIO_ES:
 484                     case MPEG2_AUDIO_ES:
 485                         if( main_GetIntVariable( INPUT_CHANNEL_VAR, 0 )
 486                                 == (p_es->i_id & 0x1F) )
 487                         switch( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) )
 488                         {
 489                         case 0:
 490                             main_PutIntVariable( INPUT_AUDIO_VAR,
 491                                                  REQUESTED_MPEG );
 492                         case REQUESTED_MPEG:
 493                             input_SelectES( p_input, p_es );
 494                         }
 495                         break;
 496
 497                     case AC3_AUDIO_ES:
 498                         if( main_GetIntVariable( INPUT_CHANNEL_VAR, 0 )
 499                                 == ((p_es->i_id & 0xF00) >> 8) )
 500                         switch( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) )
 501                         {
 502                         case 0:
 503                             main_PutIntVariable( INPUT_AUDIO_VAR,
 504                                                  REQUESTED_AC3 );
 505                         case REQUESTED_AC3:
 506                             input_SelectES( p_input, p_es );
 507                         }
 508                         break;
 509
 510                     case DVD_SPU_ES:
 511                         if( main_GetIntVariable( INPUT_SUBTITLE_VAR, -1 )
 512                                 == ((p_es->i_id & 0x1F00) >> 8) )
 513                         {
 514                             input_SelectES( p_input, p_es );
 515                         }
 516                         break;
 517
 518                     case LPCM_AUDIO_ES:
 519                         /* FIXME ! */
 520                         break;
 521                 }
 522             }
 523
 524         }
 525 #endif
 526 #ifdef STATS
 527         input_DumpStream( p_input );
 528 #endif
 529
 530         /* FIXME : ugly kludge */
 531         p_input->stream.i_size = i_size;
 532
 533         vlc_mutex_unlock( &p_input->stream.stream_lock );
 534     }
 535     else
 536     {
 537         /* The programs will be added when we read them. */
 538         vlc_mutex_lock( &p_input->stream.stream_lock );
 539         p_input->stream.pp_programs[0]->b_is_ok = 0;
 540
 541         /* FIXME : ugly kludge */
 542         p_input->stream.i_size = i_size;
 543
 544         vlc_mutex_unlock( &p_input->stream.stream_lock );
 545     }
 546
 547
 548     return 0;
 549 }
 550
 551 /*****************************************************************************
 552  * DVDInit: initializes DVD structures
 553  *****************************************************************************/
 554 static void DVDInit( input_thread_t * p_input )
 555 {
 556     thread_dvd_data_t *  p_method;
 557
 558     if( (p_method = malloc( sizeof(thread_dvd_data_t) )) == NULL )
 559     {
 560         intf_ErrMsg( "Out of memory" );
 561         p_input->b_error = 1;
 562         return;
 563     }
 564
 565     p_input->p_plugin_data = (void *)p_method;
 566     p_input->p_method_data = NULL;
 567
 568     p_method->i_fd = p_input->i_handle;
 569     /* FIXME: read several packets once */
 570     p_method->i_read_once = 1;
 571     p_method->b_encrypted = DVDCheckCSS( p_input );
 572
 573     lseek( p_input->i_handle, 0, SEEK_SET );
 574
 575     /* Reading structures initialisation */
 576     input_NetlistInit( p_input, 4096, 4096, DVD_LB_SIZE,
 577                        p_method->i_read_once );
 578
 579     /* Ifo initialisation */
 580     p_method->ifo = IfoInit( p_input->i_handle );
 581
 582     /* CSS initialisation */
 583     if( p_method->b_encrypted )
 584     {
 585
 586 #if defined( HAVE_SYS_DVDIO_H ) || defined( LINUX_DVD )
 587         p_method->css = CSSInit( p_input->i_handle );
 588
 589         if( ( p_input->b_error = p_method->css.b_error ) )
 590         {
 591             intf_ErrMsg( "CSS fatal error" );
 592             return;
 593         }
 594 #else
 595         intf_ErrMsg( "Unscrambling not supported" );
 596         p_input->b_error = 1;
 597         return;
 598 #endif
 599     }
 600
 601     /* Ifo structures reading */
 602     IfoRead( &(p_method->ifo) );
 603     intf_WarnMsg( 3, "Ifo: Initialized" );
 604
 605     /* CSS title keys decryption */
 606     if( p_method->b_encrypted )
 607     {
 608
 609 #if defined( HAVE_SYS_DVDIO_H ) || defined( LINUX_DVD )
 610         int   i;
 611
 612         p_method->css.i_title_nb = p_method->ifo.vmg.mat.i_tts_nb;
 613
 614         if( (p_method->css.p_title_key =
 615             malloc( p_method->css.i_title_nb *sizeof(title_key_t) ) ) == NULL )
 616         {
 617             intf_ErrMsg( "Out of memory" );
 618             p_input->b_error = 1;
 619             return;
 620         }
 621
 622         for( i=0 ; i<p_method->css.i_title_nb ; i++ )
 623         {
 624             p_method->css.p_title_key[i].i =
 625                 p_method->ifo.p_vts[i].i_pos +
 626                 p_method->ifo.p_vts[i].mat.i_tt_vobs_ssector * DVD_LB_SIZE;
 627         }
 628
 629         CSSGetKeys( &(p_method->css) );
 630
 631         intf_WarnMsg( 3, "CSS: initialized" );
 632 #else
 633         intf_ErrMsg( "Unscrambling not supported" );
 634         p_input->b_error = 1;
 635         return;
 636 #endif
 637     }
 638
 639     /* Initialize ES structures */
 640     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 641     input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
 642
 643     /* Set stream data */
 644     vlc_mutex_lock( &p_input->stream.stream_lock );
 645     p_input->stream.i_title_nb = p_method->ifo.vmg.mat.i_tts_nb;
 646     vlc_mutex_unlock( &p_input->stream.stream_lock );
 647
 648     /* By default, set all parameters to 0 */
 649     /* FIXME: wrong kludge to get title nb */
 650     DVDSetRegionParameters( p_input,
 651                             p_method->ifo.vmg.ptt_srpt.p_tts[0].i_tts_nb - 1,
 652                             0, 0, 0 );
 653
 654     return;
 655 }
 656
 657 /*****************************************************************************
 658  * DVDEnd: frees unused data
 659  *****************************************************************************/
 660 static void DVDEnd( input_thread_t * p_input )
 661 {
 662     /* FIXME: check order of calls */
 663 //    CSSEnd( p_input );
 664 //    IfoEnd( (ifo_t*)(&p_input->p_plugin_data->ifo ) );
 665     free( p_input->stream.p_demux_data );
 666     free( p_input->p_plugin_data );
 667     input_NetlistEnd( p_input );
 668 }
 669
 670 /*****************************************************************************
 671  * DVDRead: reads data packets into the netlist.
 672  *****************************************************************************
 673  * Returns -1 in case of error, 0 if everything went well, and 1 in case of
 674  * EOF.
 675  *****************************************************************************/
 676 static int DVDRead( input_thread_t * p_input,
 677                    data_packet_t ** pp_packets )
 678 {
 679     thread_dvd_data_t *     p_method;
 680     netlist_t *             p_netlist;
 681     struct iovec *          p_vec;
 682     struct data_packet_s *  p_data;
 683     u8 *                    pi_cur;
 684     int                     i_packet_size;
 685     int                     i_packet;
 686     int                     i_pos;
 687     int                     i;
 688     boolean_t               b_first_packet;
 689
 690     p_method = ( thread_dvd_data_t * ) p_input->p_plugin_data;
 691     p_netlist = ( netlist_t * ) p_input->p_method_data;
 692
 693     /* Get an iovec pointer */
 694     if( ( p_vec = input_NetlistGetiovec( p_netlist ) ) == NULL )
 695     {
 696         intf_ErrMsg( "DVD: read error" );
 697         return -1;
 698     }
 699
 700     /* Reads from DVD */
 701     readv( p_input->i_handle, p_vec, p_method->i_read_once );
 702
 703 #if defined( HAVE_SYS_DVDIO_H ) || defined( LINUX_DVD )
 704     if( p_method->b_encrypted )
 705     {
 706         for( i=0 ; i<p_method->i_read_once ; i++ )
 707         {
 708             CSSDescrambleSector(
 709                         p_method->css.p_title_key[p_input->stream.i_title].key,
 710                         p_vec[i].iov_base );
 711             ((u8*)(p_vec[i].iov_base))[0x14] &= 0x8F;
 712         }
 713     }
 714 #endif
 715
 716     /* Update netlist indexes */
 717     input_NetlistMviovec( p_netlist, p_method->i_read_once, &p_data );
 718
 719     i_packet = 0;
 720     /* Read headers to compute payload length */
 721     for( i = 0 ; i < p_method->i_read_once ; i++ )
 722     {
 723         i_pos = 0;
 724         b_first_packet = 1;
 725         while( i_pos < p_netlist->i_buffer_size )
 726         {
 727             pi_cur = (u8*)(p_vec[i].iov_base + i_pos);
 728             /*default header */
 729             if( U32_AT( pi_cur ) != 0x1BA )
 730             {
 731                 /* That's the case for all packets, except pack header. */
 732                 i_packet_size = U16_AT( pi_cur + 4 );
 733             }
 734             else
 735             {
 736                 /* Pack header. */
 737                 if( ( pi_cur[4] & 0xC0 ) == 0x40 )
 738                 {
 739                     /* MPEG-2 */
 740                     i_packet_size = 8;
 741                 }
 742                 else if( ( pi_cur[4] & 0xF0 ) == 0x20 )
 743                 {
 744                     /* MPEG-1 */
 745                     i_packet_size = 6;
 746                 }
 747                 else
 748                 {
 749                     intf_ErrMsg( "Unable to determine stream type" );
 750                     return( -1 );
 751                 }
 752             }
 753             if( b_first_packet )
 754             {
 755                 p_data->b_discard_payload = 0;
 756                 b_first_packet = 0;
 757             }
 758             else
 759             {
 760                 p_data = input_NetlistNewPacket( p_netlist ,
 761                                                  i_packet_size + 6 );
 762                 memcpy( p_data->p_buffer,
 763                         p_vec[i].iov_base + i_pos , i_packet_size + 6 );
 764             }
 765
 766             p_data->p_payload_end = p_data->p_payload_start + i_packet_size + 6;
 767             pp_packets[i_packet] = p_data;
 768             i_packet++;
 769             i_pos += i_packet_size + 6;
 770         }
 771     }
 772     pp_packets[i_packet] = NULL;
 773
 774     vlc_mutex_lock( &p_input->stream.stream_lock );
 775     p_input->stream.i_tell += p_method->i_read_once *DVD_LB_SIZE;
 776     vlc_mutex_unlock( &p_input->stream.stream_lock );
 777
 778     return( 0 );
 779 }
 780
 781
 782 /*****************************************************************************
 783  * DVDRewind : reads a stream backward
 784  *****************************************************************************/
 785 static int DVDRewind( input_thread_t * p_input )
 786 {
 787     return( -1 );
 788 }
 789
 790 /*****************************************************************************
 791  * DVDSeek : Goes to a given position on the stream ; this one is used by the
 792  * input and translate chronological position from input to logical postion
 793  * on the device
 794  *****************************************************************************/
 795 static void DVDSeek( input_thread_t * p_input, off_t i_off )
 796 {
 797     thread_dvd_data_t *     p_method;
 798     off_t                   i_pos;
 799
 800     p_method = ( thread_dvd_data_t * )p_input->p_plugin_data;
 801
 802     /* We have to take care of offset of beginning of title */
 803     i_pos = i_off + p_method->i_start_byte;
 804
 805     /* With DVD, we have to be on a sector boundary */
 806     i_pos = i_pos & (~0x7ff);
 807
 808     i_pos = lseek( p_input->i_handle, i_pos, SEEK_SET );
 809
 810     p_input->stream.i_tell = i_pos - p_method->i_start_byte;
 811
 812     return;
 813 }