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 1.15 2001/02/20 02:53:13 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  DVDSetArea  ( struct input_thread_s *, int, int, int, int );
 245 static int  DVDRewind   ( struct input_thread_s * );
 246
 247 /*****************************************************************************
 248  * Functions exported as capabilities. They are declared as static so that
 249  * we don't pollute the namespace too much.
 250  *****************************************************************************/
 251 void input_getfunctions( function_list_t * p_function_list )
 252 {
 253 #define input p_function_list->functions.input
 254     p_function_list->pf_probe = DVDProbe;
 255     input.pf_init             = DVDInit;
 256     input.pf_open             = input_FileOpen;
 257     input.pf_close            = input_FileClose;
 258     input.pf_end              = DVDEnd;
 259     input.pf_read             = DVDRead;
 260     input.pf_set_area         = DVDSetArea;
 261     input.pf_demux            = input_DemuxPS;
 262     input.pf_new_packet       = input_NetlistNewPacket;
 263     input.pf_new_pes          = input_NetlistNewPES;
 264     input.pf_delete_packet    = input_NetlistDeletePacket;
 265     input.pf_delete_pes       = input_NetlistDeletePES;
 266     input.pf_rewind           = DVDRewind;
 267     input.pf_seek             = DVDSeek;
 268 #undef input
 269 }
 270
 271 /*
 272  * Local tools to decode some data in ifo
 273  */
 274
 275 /*****************************************************************************
 276  * Language: gives the long language name from the two-letters ISO-639 code
 277  *****************************************************************************/
 278 static char * Language( char * p_code )
 279 {
 280     int     i = 0;
 281
 282     while( !memcmp( lang_tbl[i].p_code, p_code, 2 ) && lang_tbl[i].p_lang_long )
 283     {
 284         i++;
 285     }
 286
 287     return lang_tbl[i].p_lang_long;
 288 }
 289
 290 /*
 291  * Data reading functions
 292  */
 293
 294 /*****************************************************************************
 295  * DVDProbe: verifies that the stream is a PS stream
 296  *****************************************************************************/
 297 static int DVDProbe( probedata_t *p_data )
 298 {
 299     input_thread_t * p_input = (input_thread_t *)p_data;
 300
 301     char * psz_name = p_input->p_source;
 302     int i_handle;
 303     int i_score = 5;
 304
 305     if( TestMethod( INPUT_METHOD_VAR, "dvd" ) )
 306     {
 307         return( 999 );
 308     }
 309
 310     if( ( strlen(psz_name) > 4 ) && !strncasecmp( psz_name, "dvd:", 4 ) )
 311     {
 312         /* If the user specified "dvd:" then it's probably a DVD */
 313         i_score = 100;
 314         psz_name += 4;
 315     }
 316
 317     i_handle = open( psz_name, 0 );
 318     if( i_handle == -1 )
 319     {
 320         return( 0 );
 321     }
 322     close( i_handle );
 323
 324     return( i_score );
 325 }
 326
 327 /*****************************************************************************
 328  * DVDCheckCSS: check the stream
 329  *****************************************************************************/
 330 static int DVDCheckCSS( input_thread_t * p_input )
 331 {
 332 #if defined( HAVE_SYS_DVDIO_H ) || defined( LINUX_DVD )
 333     return CSSTest( p_input->i_handle );
 334 #else
 335     /* DVD ioctls unavailable.
 336      * FIXME: Check the stream to see whether it is encrypted or not
 337      * to give and accurate error message */
 338     return 0;
 339 #endif
 340 }
 341
 342 /*****************************************************************************
 343  * DVDSetArea: initialize input data for title x, chapter y.
 344  * It should be called for each user navigation request, and to change
 345  * audio or sub-picture streams.
 346  * ---
 347  * Take care that i_title and i_chapter start from 0.
 348  *****************************************************************************/
 349 static int DVDSetArea( input_thread_t * p_input,
 350                        int i_title, int i_chapter,
 351                        int i_audio, int i_spu )
 352 {
 353     thread_dvd_data_t *  p_method;
 354     es_descriptor_t *    p_es;
 355     off_t                i_start;
 356     off_t                i_size;
 357     pgc_t *              p_pgc;
 358     int                  i_start_cell;
 359     int                  i_end_cell;
 360     int                  i_index;
 361     int                  i_cell;
 362     int                  i_nb;
 363     int                  i_id;
 364     int                  i;
 365
 366     p_method = (thread_dvd_data_t*)p_input->p_plugin_data;
 367
 368     /* Ifo structures reading */
 369     p_method->ifo.i_title = i_title;
 370     IfoReadVTS( &(p_method->ifo) );
 371     intf_WarnMsg( 2, "Ifo: VTS initialized" );
 372
 373 #if defined( HAVE_SYS_DVDIO_H ) || defined( LINUX_DVD )
 374     if( p_method->b_encrypted )
 375     {
 376         p_method->css.i_title = i_title;
 377         p_method->css.i_title_pos =
 378                 p_method->ifo.vts.i_pos +
 379                 p_method->ifo.vts.mat.i_tt_vobs_ssector * DVD_LB_SIZE;
 380         CSSGetKey( &(p_method->css) );
 381         intf_WarnMsg( 2, "CSS: VTS key initialized" );
 382     }
 383 #endif
 384
 385     /* Set selected title start and size */
 386     p_pgc = &p_method->ifo.vts.pgci_ti.p_srp[0].pgc;
 387
 388     /* Find cell index in Program chain */
 389     i_index = p_pgc->prg_map.pi_entry_cell[i_chapter] - 1;
 390
 391     /* Search for cell_index in cell adress_table */
 392     i_cell = 0;
 393     while( p_pgc->p_cell_pos_inf[i_index].i_vob_id >
 394            p_method->ifo.vts.c_adt.p_cell_inf[i_cell].i_vob_id )
 395     {
 396         i_cell++;
 397     }
 398     while( p_pgc->p_cell_pos_inf[i_index].i_cell_id >
 399            p_method->ifo.vts.c_adt.p_cell_inf[i_cell].i_cell_id )
 400     {
 401         i_cell++;
 402     }
 403     i_start_cell = i_cell;
 404     i_end_cell = i_start_cell + p_pgc->i_cell_nb - 1;
 405
 406     intf_WarnMsg( 3, "DVD: Start cell: %d End Cell: %d",
 407                                             i_start_cell, i_end_cell );
 408
 409     p_method->i_start_cell = i_start_cell;
 410     p_method->i_end_cell = i_end_cell;
 411
 412     /* start is : beginning of vts + offset to vobs + offset to vob x */
 413     i_start = p_method->ifo.vts.i_pos + DVD_LB_SIZE *
 414             ( p_method->ifo.vts.mat.i_tt_vobs_ssector +
 415               p_method->ifo.vts.c_adt.p_cell_inf[i_start_cell].i_ssector );
 416
 417     i_start = lseek( p_input->i_handle, i_start, SEEK_SET );
 418     intf_WarnMsg( 2, "DVD: VOBstart at: %lld", i_start );
 419
 420     i_size = (off_t)
 421         ( p_method->ifo.vts.c_adt.p_cell_inf[i_end_cell].i_esector -
 422           p_method->ifo.vts.c_adt.p_cell_inf[i_start_cell].i_ssector + 1 )
 423         *DVD_LB_SIZE;
 424     intf_WarnMsg( 2, "DVD: stream size: %lld", i_size );
 425
 426 #if 0
 427     p_es = NULL;
 428
 429     vlc_mutex_lock( &p_input->stream.stream_lock );
 430
 431     /* ES 0 -> video MPEG2 */
 432     intf_WarnMsg( 1, "DVD: Video MPEG2 stream" );
 433     p_es = input_AddES( p_input, p_input->stream.pp_programs[0], 0xe0, 0 );
 434     p_es->i_stream_id = 0xe0;
 435     p_es->i_type = MPEG2_VIDEO_ES;
 436     input_SelectES( p_input, p_es );
 437
 438     /* Audio ES, in the order they appear in .ifo */
 439     i_nb = p_method->ifo.vts.mat.i_audio_nb;
 440     intf_WarnMsg( 1, "DVD: Audio streams %d", i_nb );
 441     for( i = 0 ; i < i_nb ; i++ )
 442     {
 443         i_id = ( ( 0x80 + i ) << 8 ) | 0xbd;
 444         p_es = input_AddES( p_input,
 445                            p_input->stream.pp_programs[0], i_id, 0 );
 446         p_es->i_stream_id = 0xbd;
 447         p_es->i_type = AC3_AUDIO_ES;
 448         p_es->b_audio = 1;
 449 //        p_es->psz_desc = p_method->ifo.vts.mat.pi_audio_attr[i];
 450         if( i == 0 )
 451         {
 452             input_SelectES( p_input, p_es );
 453         }
 454     }
 455
 456     /* Sub Picture ES */
 457     i_nb = p_method->ifo.vts.mat.i_subpic_nb;
 458     intf_WarnMsg( 1, "DVD: Subpic streams %d", i_nb );
 459     for( i = 0 ; i < i_nb ; i++ )
 460     {
 461         i_id = ( ( 0x20 + i ) << 8 ) | 0xbd;
 462         p_es = input_AddES( p_input,
 463                            p_input->stream.pp_programs[0], i_id, 0 );
 464         p_es->i_stream_id = 0xbd;
 465         p_es->i_type = DVD_SPU_ES;
 466 //        p_es->psz_desc = p_method->ifo.vts.mat.pi_subpic_attr[i];
 467         if( i == 0 )
 468         {
 469             input_SelectES( p_input, p_es );
 470         }
 471
 472     }
 473
 474     /* area definition */
 475     p_input->stream.pp_areas[0]->i_start = i_start;
 476     p_input->stream.pp_areas[0]->i_size = i_size;
 477
 478     /* No PSM to read in DVD mode */
 479     p_input->stream.pp_programs[0]->b_is_ok = 1;
 480
 481     vlc_mutex_unlock( &p_input->stream.stream_lock );
 482
 483 #else
 484
 485     if( p_input->stream.b_seekable )
 486     {
 487         stream_ps_data_t * p_demux_data =
 488              (stream_ps_data_t *)p_input->stream.pp_programs[0]->p_demux_data;
 489
 490         /* Pre-parse the stream to gather stream_descriptor_t. */
 491         p_input->stream.pp_programs[0]->b_is_ok = 0;
 492         p_demux_data->i_PSM_version = EMPTY_PSM_VERSION;
 493
 494         while( !p_input->b_die && !p_input->b_error
 495                 && !p_demux_data->b_has_PSM )
 496         {
 497             int                 i_result, i;
 498             data_packet_t *     pp_packets[INPUT_READ_ONCE];
 499
 500             i_result = DVDRead( p_input, pp_packets );
 501             if( i_result == 1 )
 502             {
 503                 /* EOF */
 504                 vlc_mutex_lock( &p_input->stream.stream_lock );
 505                 p_input->stream.pp_programs[0]->b_is_ok = 1;
 506                 vlc_mutex_unlock( &p_input->stream.stream_lock );
 507                 break;
 508             }
 509             if( i_result == -1 )
 510             {
 511                 p_input->b_error = 1;
 512                 break;
 513             }
 514
 515             for( i = 0; i < INPUT_READ_ONCE && pp_packets[i] != NULL; i++ )
 516             {
 517                 /* FIXME: use i_p_config_t */
 518                 input_ParsePS( p_input, pp_packets[i] );
 519                 input_NetlistDeletePacket( p_input->p_method_data,
 520                                            pp_packets[i] );
 521             }
 522
 523             /* File too big. */
 524             if( p_input->stream.pp_areas[0]->i_tell > INPUT_PREPARSE_LENGTH )
 525             {
 526                 break;
 527             }
 528         }
 529         lseek( p_input->i_handle, i_start, SEEK_SET );
 530         vlc_mutex_lock( &p_input->stream.stream_lock );
 531
 532         /* i_tell is an indicator from the beginning of the stream,
 533          * not of the DVD */
 534         p_input->stream.pp_areas[0]->i_tell = 0;
 535
 536         if( p_demux_data->b_has_PSM )
 537         {
 538             /* (The PSM decoder will care about spawning the decoders) */
 539             p_input->stream.pp_programs[0]->b_is_ok = 1;
 540         }
 541 #ifdef AUTO_SPAWN
 542         else
 543         {
 544             /* (We have to do it ourselves) */
 545             int                 i_es;
 546
 547             /* FIXME: we should do multiple passes in case an audio type
 548              * is not present */
 549             for( i_es = 0;
 550                  i_es < p_input->stream.pp_programs[0]->i_es_number;
 551                  i_es++ )
 552             {
 553 #define p_es p_input->stream.pp_programs[0]->pp_es[i_es]
 554                 switch( p_es->i_type )
 555                 {
 556                     case MPEG1_VIDEO_ES:
 557                     case MPEG2_VIDEO_ES:
 558                         input_SelectES( p_input, p_es );
 559                         break;
 560
 561                     case MPEG1_AUDIO_ES:
 562                     case MPEG2_AUDIO_ES:
 563                         if( main_GetIntVariable( INPUT_CHANNEL_VAR, 0 )
 564                                 == (p_es->i_id & 0x1F) )
 565                         switch( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) )
 566                         {
 567                         case 0:
 568                             main_PutIntVariable( INPUT_AUDIO_VAR,
 569                                                  REQUESTED_MPEG );
 570                         case REQUESTED_MPEG:
 571                             input_SelectES( p_input, p_es );
 572                         }
 573                         break;
 574
 575                     case AC3_AUDIO_ES:
 576                         if( main_GetIntVariable( INPUT_CHANNEL_VAR, 0 )
 577                                 == ((p_es->i_id & 0xF00) >> 8) )
 578                         switch( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) )
 579                         {
 580                         case 0:
 581                             main_PutIntVariable( INPUT_AUDIO_VAR,
 582                                                  REQUESTED_AC3 );
 583                         case REQUESTED_AC3:
 584                             input_SelectES( p_input, p_es );
 585                         }
 586                         break;
 587
 588                     case DVD_SPU_ES:
 589                         if( main_GetIntVariable( INPUT_SUBTITLE_VAR, -1 )
 590                                 == ((p_es->i_id & 0x1F00) >> 8) )
 591                         {
 592                             input_SelectES( p_input, p_es );
 593                         }
 594                         break;
 595
 596                     case LPCM_AUDIO_ES:
 597                         /* FIXME ! */
 598                         break;
 599                 }
 600             }
 601
 602         }
 603 #endif
 604 #ifdef STATS
 605         input_DumpStream( p_input );
 606 #endif
 607
 608         /* FIXME : ugly kludge */
 609         p_input->stream.pp_areas[0]->i_size = i_size;
 610
 611         vlc_mutex_unlock( &p_input->stream.stream_lock );
 612     }
 613     else
 614     {
 615         /* The programs will be added when we read them. */
 616         vlc_mutex_lock( &p_input->stream.stream_lock );
 617         p_input->stream.pp_programs[0]->b_is_ok = 0;
 618
 619         /* FIXME : ugly kludge */
 620         p_input->stream.pp_areas[0]->i_size = i_size;
 621
 622         vlc_mutex_unlock( &p_input->stream.stream_lock );
 623     }
 624 #endif
 625
 626     return 0;
 627 }
 628
 629 /*****************************************************************************
 630  * DVDInit: initializes DVD structures
 631  *****************************************************************************/
 632 static void DVDInit( input_thread_t * p_input )
 633 {
 634     thread_dvd_data_t *  p_method;
 635     int                  i;
 636
 637     if( (p_method = malloc( sizeof(thread_dvd_data_t) )) == NULL )
 638     {
 639         intf_ErrMsg( "Out of memory" );
 640         p_input->b_error = 1;
 641         return;
 642     }
 643
 644     p_input->p_plugin_data = (void *)p_method;
 645     p_input->p_method_data = NULL;
 646
 647     p_method->i_fd = p_input->i_handle;
 648     /* FIXME: read several packets once */
 649     p_method->i_read_once = 1;
 650     p_method->b_encrypted = DVDCheckCSS( p_input );
 651
 652     lseek( p_input->i_handle, 0, SEEK_SET );
 653
 654     /* Reading structures initialisation */
 655     input_NetlistInit( p_input, 4096, 4096, DVD_LB_SIZE,
 656                        p_method->i_read_once );
 657     intf_WarnMsg( 2, "DVD: Netlist initialized" );
 658
 659     /* Ifo initialisation */
 660     p_method->ifo = IfoInit( p_input->i_handle );
 661     intf_WarnMsg( 2, "Ifo: VMG initialized" );
 662
 663     /* CSS initialisation */
 664     if( p_method->b_encrypted )
 665     {
 666
 667 #if defined( HAVE_SYS_DVDIO_H ) || defined( LINUX_DVD )
 668         p_method->css = CSSInit( p_input->i_handle );
 669
 670         if( ( p_input->b_error = p_method->css.b_error ) )
 671         {
 672             intf_ErrMsg( "CSS fatal error" );
 673             return;
 674         }
 675         intf_WarnMsg( 2, "CSS: initialized" );
 676 #else
 677         intf_ErrMsg( "Unscrambling not supported" );
 678         p_input->b_error = 1;
 679         return;
 680 #endif
 681     }
 682
 683     /* Initialize ES structures */
 684     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 685     input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
 686
 687     /* Set stream and area data */
 688     vlc_mutex_lock( &p_input->stream.stream_lock );
 689
 690     /* FIXME: We consider here that one title is one title set
 691      * it is not true !!! */
 692
 693 #define area p_input->stream.pp_areas
 694     /* We start from 1 here since area 0 is reserved for video_ts.vob */
 695     for( i = 1 ; i < p_method->ifo.vmg.mat.i_tts_nb ; i++ )
 696     {
 697         input_AddArea( p_input );
 698
 699         /* Should not be so simple eventually :
 700          * are title Program Chains, or still something else ? */
 701         area[i]->i_id = i;
 702
 703         /* Absolute start offset and size
 704          * We can only set that with vts ifo, so we do it during the
 705          * first call to DVDSetArea */
 706         area[i]->i_start = 0;
 707         area[i]->i_size = 0;
 708
 709         /* Number of chapter */
 710         area[i]->i_part_nb = 0;
 711         area[i]->i_part = 1;
 712         /* Offset to vts_i_0.ifo */
 713         area[i]->i_plugin_data = p_method->ifo.i_off +
 714             ( p_method->ifo.vmg.ptt_srpt.p_tts[i-1].i_ssector * DVD_LB_SIZE );
 715     }
 716 #undef area
 717
 718     vlc_mutex_unlock( &p_input->stream.stream_lock );
 719
 720     /* By default, set all parameters to 0 */
 721     /* FIXME: wrong kludge to get first title number */
 722     DVDSetArea( p_input, p_method->ifo.vmg.ptt_srpt.p_tts[0].i_tts_nb - 1,
 723                 0, 0, 0 );
 724
 725     return;
 726 }
 727
 728 /*****************************************************************************
 729  * DVDEnd: frees unused data
 730  *****************************************************************************/
 731 static void DVDEnd( input_thread_t * p_input )
 732 {
 733     /* FIXME: check order of calls */
 734 //    CSSEnd( p_input );
 735 //    IfoEnd( (ifo_t*)(&p_input->p_plugin_data->ifo ) );
 736     free( p_input->stream.p_demux_data );
 737     free( p_input->p_plugin_data );
 738     input_NetlistEnd( p_input );
 739 }
 740
 741 /*****************************************************************************
 742  * DVDRead: reads data packets into the netlist.
 743  *****************************************************************************
 744  * Returns -1 in case of error, 0 if everything went well, and 1 in case of
 745  * EOF.
 746  *****************************************************************************/
 747 static int DVDRead( input_thread_t * p_input,
 748                    data_packet_t ** pp_packets )
 749 {
 750     thread_dvd_data_t *     p_method;
 751     netlist_t *             p_netlist;
 752     struct iovec *          p_vec;
 753     struct data_packet_s *  p_data;
 754     u8 *                    pi_cur;
 755     int                     i_packet_size;
 756     int                     i_packet;
 757     int                     i_pos;
 758     int                     i;
 759     boolean_t               b_first_packet;
 760
 761     p_method = ( thread_dvd_data_t * ) p_input->p_plugin_data;
 762     p_netlist = ( netlist_t * ) p_input->p_method_data;
 763
 764     /* Get an iovec pointer */
 765     if( ( p_vec = input_NetlistGetiovec( p_netlist ) ) == NULL )
 766     {
 767         intf_ErrMsg( "DVD: read error" );
 768         return -1;
 769     }
 770
 771     /* Reads from DVD */
 772     readv( p_input->i_handle, p_vec, p_method->i_read_once );
 773
 774 #if defined( HAVE_SYS_DVDIO_H ) || defined( LINUX_DVD )
 775     if( p_method->b_encrypted )
 776     {
 777         for( i=0 ; i<p_method->i_read_once ; i++ )
 778         {
 779             CSSDescrambleSector( p_method->css.pi_title_key,
 780                                  p_vec[i].iov_base );
 781             ((u8*)(p_vec[i].iov_base))[0x14] &= 0x8F;
 782         }
 783     }
 784 #endif
 785
 786     /* Update netlist indexes */
 787     input_NetlistMviovec( p_netlist, p_method->i_read_once, &p_data );
 788
 789     i_packet = 0;
 790     /* Read headers to compute payload length */
 791     for( i = 0 ; i < p_method->i_read_once ; i++ )
 792     {
 793         i_pos = 0;
 794         b_first_packet = 1;
 795         while( i_pos < p_netlist->i_buffer_size )
 796         {
 797             pi_cur = (u8*)(p_vec[i].iov_base + i_pos);
 798             /*default header */
 799             if( U32_AT( pi_cur ) != 0x1BA )
 800             {
 801                 /* That's the case for all packets, except pack header. */
 802                 i_packet_size = U16_AT( pi_cur + 4 );
 803             }
 804             else
 805             {
 806                 /* Pack header. */
 807                 if( ( pi_cur[4] & 0xC0 ) == 0x40 )
 808                 {
 809                     /* MPEG-2 */
 810                     i_packet_size = 8;
 811                 }
 812                 else if( ( pi_cur[4] & 0xF0 ) == 0x20 )
 813                 {
 814                     /* MPEG-1 */
 815                     i_packet_size = 6;
 816                 }
 817                 else
 818                 {
 819                     intf_ErrMsg( "Unable to determine stream type" );
 820                     return( -1 );
 821                 }
 822             }
 823             if( b_first_packet )
 824             {
 825                 p_data->b_discard_payload = 0;
 826                 b_first_packet = 0;
 827             }
 828             else
 829             {
 830                 p_data = input_NetlistNewPacket( p_netlist ,
 831                                                  i_packet_size + 6 );
 832                 memcpy( p_data->p_buffer,
 833                         p_vec[i].iov_base + i_pos , i_packet_size + 6 );
 834             }
 835
 836             p_data->p_payload_end = p_data->p_payload_start + i_packet_size + 6;
 837             pp_packets[i_packet] = p_data;
 838             i_packet++;
 839             i_pos += i_packet_size + 6;
 840         }
 841     }
 842     pp_packets[i_packet] = NULL;
 843
 844     vlc_mutex_lock( &p_input->stream.stream_lock );
 845     p_input->stream.pp_areas[0]->i_tell += p_method->i_read_once *DVD_LB_SIZE;
 846     vlc_mutex_unlock( &p_input->stream.stream_lock );
 847
 848     return( 0 );
 849 }
 850
 851
 852 /*****************************************************************************
 853  * DVDRewind : reads a stream backward
 854  *****************************************************************************/
 855 static int DVDRewind( input_thread_t * p_input )
 856 {
 857     return( -1 );
 858 }
 859
 860 /*****************************************************************************
 861  * DVDSeek : Goes to a given position on the stream ; this one is used by the
 862  * input and translate chronological position from input to logical postion
 863  * on the device
 864  *****************************************************************************/
 865 static void DVDSeek( input_thread_t * p_input, off_t i_off )
 866 {
 867     thread_dvd_data_t *     p_method;
 868     off_t                   i_pos;
 869
 870     p_method = ( thread_dvd_data_t * )p_input->p_plugin_data;
 871
 872     /* We have to take care of offset of beginning of title */
 873     i_pos = i_off + p_input->stream.pp_areas[0]->i_start;
 874
 875     /* With DVD, we have to be on a sector boundary */
 876     i_pos = i_pos & (~0x7ff);
 877
 878     i_pos = lseek( p_input->i_handle, i_pos, SEEK_SET );
 879
 880     p_input->stream.pp_areas[0]->i_tell = i_pos - p_input->stream.pp_areas[0]->i_start;
 881
 882     return;
 883 }