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 1.18 2001/02/20 23:30:15 sam 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 #define MODULE_NAME dvd
  33 #include "modules_inner.h"
  34
  35 /*****************************************************************************
  36  * Preamble
  37  *****************************************************************************/
  38 #include "defs.h"
  39
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <unistd.h>
  43 #include <netinet/in.h>
  44
  45 #include <fcntl.h>
  46 #include <sys/types.h>
  47 #include <sys/uio.h>
  48
  49 #include <string.h>
  50 #include <errno.h>
  51 #include <malloc.h>
  52
  53 #include "config.h"
  54 #include "common.h"
  55 #include "threads.h"
  56 #include "mtime.h"
  57 #include "tests.h"
  58
  59 #include "intf_msg.h"
  60
  61 #include "main.h"
  62
  63 #include "stream_control.h"
  64 #include "input_ext-intf.h"
  65 #include "input_ext-dec.h"
  66
  67 #include "input.h"
  68 #include "input_netlist.h"
  69
  70 #include "dvd_ifo.h"
  71 #include "dvd_css.h"
  72 #include "input_dvd.h"
  73 #include "mpeg_system.h"
  74
  75 #include "debug.h"
  76
  77 #include "modules.h"
  78
  79 /*****************************************************************************
  80  * Local tables
  81  *****************************************************************************/
  82 static struct
  83 {
  84     char    p_code[3];
  85     char    p_lang_long[20];
  86 } lang_tbl[] =
  87     {
  88
  89     /* The ISO 639 language codes.
  90      * Language names with * prefix are not spelled in their own language
  91      */
  92         {"  ", "Not Specified"},
  93         {"aa", "*Afar"},
  94         {"ab", "*Abkhazian"},
  95         {"af", "*Afrikaans"},
  96         {"am", "*Amharic"},
  97         {"ar", "*Arabic"},
  98         {"as", "*Assamese"},
  99         {"ay", "*Aymara"},
 100         {"az", "*Azerbaijani"},
 101         {"ba", "*Bashkir"},
 102         {"be", "*Byelorussian"},
 103         {"bg", "*Bulgarian"},
 104         {"bh", "*Bihari"},
 105         {"bi", "*Bislama"},
 106         {"bn", "*Bengali; Bangla"},
 107         {"bo", "*Tibetan"},
 108         {"br", "*Breton"},
 109         {"ca", "*Catalan"},
 110         {"co", "*Corsican"},
 111         {"cs", "*Czech(Ceske)"},
 112         {"cy", "*Welsh"},
 113         {"da", "Dansk"},
 114         {"de", "Deutsch"},
 115         {"dz", "*Bhutani"},
 116         {"el", "*Greek"},
 117         {"en", "English"},
 118         {"eo", "*Esperanto"},
 119         {"es", "Espanol"},
 120         {"et", "*Estonian"},
 121         {"eu", "*Basque"},
 122         {"fa", "*Persian"},
 123         {"fi", "Suomi"},
 124         {"fj", "*Fiji"},
 125         {"fo", "*Faroese"},
 126         {"fr", "Francais"},
 127         {"fy", "*Frisian"},
 128         {"ga", "*Irish"},
 129         {"gd", "*Scots Gaelic"},
 130         {"gl", "*Galician"},
 131         {"gn", "*Guarani"},
 132         {"gu", "*Gujarati"},
 133         {"ha", "*Hausa"},
 134         {"he", "*Hebrew"},                              // formerly iw
 135         {"hi", "*Hindi"},
 136         {"hr", "Hrvatski"},                             // Croatian
 137         {"hu", "Magyar"},
 138         {"hy", "*Armenian"},
 139         {"ia", "*Interlingua"},
 140         {"id", "*Indonesian"},                          // formerly in
 141         {"ie", "*Interlingue"},
 142         {"ik", "*Inupiak"},
 143         {"in", "*Indonesian"},                          // replaced by id
 144         {"is", "Islenska"},
 145         {"it", "Italiano"},
 146         {"iu", "*Inuktitut"},
 147         {"iw", "*Hebrew"},                              // replaced by he
 148         {"ja", "*Japanese"},
 149         {"ji", "*Yiddish"},                             // replaced by yi
 150         {"jw", "*Javanese"},
 151         {"ka", "*Georgian"},
 152         {"kk", "*Kazakh"},
 153         {"kl", "*Greenlandic"},
 154         {"km", "*Cambodian"},
 155         {"kn", "*Kannada"},
 156         {"ko", "*Korean"},
 157         {"ks", "*Kashmiri"},
 158         {"ku", "*Kurdish"},
 159         {"ky", "*Kirghiz"},
 160         {"la", "*Latin"},
 161         {"ln", "*Lingala"},
 162         {"lo", "*Laothian"},
 163         {"lt", "*Lithuanian"},
 164         {"lv", "*Latvian, Lettish"},
 165         {"mg", "*Malagasy"},
 166         {"mi", "*Maori"},
 167         {"mk", "*Macedonian"},
 168         {"ml", "*Malayalam"},
 169         {"mn", "*Mongolian"},
 170         {"mo", "*Moldavian"},
 171         {"mr", "*Marathi"},
 172         {"ms", "*Malay"},
 173         {"mt", "*Maltese"},
 174         {"my", "*Burmese"},
 175         {"na", "*Nauru"},
 176         {"ne", "*Nepali"},
 177         {"nl", "Nederlands"},
 178         {"no", "Norsk"},
 179         {"oc", "*Occitan"},
 180         {"om", "*(Afan) Oromo"},
 181         {"or", "*Oriya"},
 182         {"pa", "*Punjabi"},
 183         {"pl", "*Polish"},
 184         {"ps", "*Pashto, Pushto"},
 185         {"pt", "Portugues"},
 186         {"qu", "*Quechua"},
 187         {"rm", "*Rhaeto-Romance"},
 188         {"rn", "*Kirundi"},
 189         {"ro", "*Romanian"},
 190         {"ru", "*Russian"},
 191         {"rw", "*Kinyarwanda"},
 192         {"sa", "*Sanskrit"},
 193         {"sd", "*Sindhi"},
 194         {"sg", "*Sangho"},
 195         {"sh", "*Serbo-Croatian"},
 196         {"si", "*Sinhalese"},
 197         {"sk", "*Slovak"},
 198         {"sl", "*Slovenian"},
 199         {"sm", "*Samoan"},
 200         {"sn", "*Shona"},
 201         {"so", "*Somali"},
 202         {"sq", "*Albanian"},
 203         {"sr", "*Serbian"},
 204         {"ss", "*Siswati"},
 205         {"st", "*Sesotho"},
 206         {"su", "*Sundanese"},
 207         {"sv", "Svenska"},
 208         {"sw", "*Swahili"},
 209         {"ta", "*Tamil"},
 210         {"te", "*Telugu"},
 211         {"tg", "*Tajik"},
 212         {"th", "*Thai"},
 213         {"ti", "*Tigrinya"},
 214         {"tk", "*Turkmen"},
 215         {"tl", "*Tagalog"},
 216         {"tn", "*Setswana"},
 217         {"to", "*Tonga"},
 218         {"tr", "*Turkish"},
 219         {"ts", "*Tsonga"},
 220         {"tt", "*Tatar"},
 221         {"tw", "*Twi"},
 222         {"ug", "*Uighur"},
 223         {"uk", "*Ukrainian"},
 224         {"ur", "*Urdu"},
 225         {"uz", "*Uzbek"},
 226         {"vi", "*Vietnamese"},
 227         {"vo", "*Volapuk"},
 228         {"wo", "*Wolof"},
 229         {"xh", "*Xhosa"},
 230         {"yi", "*Yiddish"},                             // formerly ji
 231         {"yo", "*Yoruba"},
 232         {"za", "*Zhuang"},
 233         {"zh", "*Chinese"},
 234         {"zu", "*Zulu"},
 235         {"\0", ""}
 236     };
 237
 238 /*****************************************************************************
 239  * Local prototypes
 240  *****************************************************************************/
 241 static int  DVDProbe    ( probedata_t *p_data );
 242 static int  DVDCheckCSS ( struct input_thread_s * );
 243 static int  DVDRead     ( struct input_thread_s *, data_packet_t ** );
 244 static void DVDInit     ( struct input_thread_s * );
 245 static void DVDEnd      ( struct input_thread_s * );
 246 static void DVDSeek     ( struct input_thread_s *, off_t );
 247 static int  DVDSetArea  ( struct input_thread_s *, int, int, int, int );
 248 static int  DVDRewind   ( struct input_thread_s * );
 249
 250 /*****************************************************************************
 251  * Functions exported as capabilities. They are declared as static so that
 252  * we don't pollute the namespace too much.
 253  *****************************************************************************/
 254 void _M( input_getfunctions )( function_list_t * p_function_list )
 255 {
 256 #define input p_function_list->functions.input
 257     p_function_list->pf_probe = DVDProbe;
 258     input.pf_init             = DVDInit;
 259     input.pf_open             = input_FileOpen;
 260     input.pf_close            = input_FileClose;
 261     input.pf_end              = DVDEnd;
 262     input.pf_read             = DVDRead;
 263     input.pf_set_area         = DVDSetArea;
 264     input.pf_demux            = input_DemuxPS;
 265     input.pf_new_packet       = input_NetlistNewPacket;
 266     input.pf_new_pes          = input_NetlistNewPES;
 267     input.pf_delete_packet    = input_NetlistDeletePacket;
 268     input.pf_delete_pes       = input_NetlistDeletePES;
 269     input.pf_rewind           = DVDRewind;
 270     input.pf_seek             = DVDSeek;
 271 #undef input
 272 }
 273
 274 /*
 275  * Local tools to decode some data in ifo
 276  */
 277
 278 /*****************************************************************************
 279  * Language: gives the long language name from the two-letters ISO-639 code
 280  *****************************************************************************/
 281 static char * Language( char * p_code )
 282 {
 283     int     i = 0;
 284
 285     while( !memcmp( lang_tbl[i].p_code, p_code, 2 ) && lang_tbl[i].p_lang_long )
 286     {
 287         i++;
 288     }
 289
 290     return lang_tbl[i].p_lang_long;
 291 }
 292
 293 /*
 294  * Data reading functions
 295  */
 296
 297 /*****************************************************************************
 298  * DVDProbe: verifies that the stream is a PS stream
 299  *****************************************************************************/
 300 static int DVDProbe( probedata_t *p_data )
 301 {
 302     input_thread_t * p_input = (input_thread_t *)p_data;
 303
 304     char * psz_name = p_input->p_source;
 305     int i_handle;
 306     int i_score = 5;
 307
 308     if( TestMethod( INPUT_METHOD_VAR, "dvd" ) )
 309     {
 310         return( 999 );
 311     }
 312
 313     if( ( strlen(psz_name) > 4 ) && !strncasecmp( psz_name, "dvd:", 4 ) )
 314     {
 315         /* If the user specified "dvd:" then it's probably a DVD */
 316         i_score = 100;
 317         psz_name += 4;
 318     }
 319
 320     i_handle = open( psz_name, 0 );
 321     if( i_handle == -1 )
 322     {
 323         return( 0 );
 324     }
 325     close( i_handle );
 326
 327     return( i_score );
 328 }
 329
 330 /*****************************************************************************
 331  * DVDCheckCSS: check the stream
 332  *****************************************************************************/
 333 static int DVDCheckCSS( input_thread_t * p_input )
 334 {
 335     return CSSTest( p_input->i_handle );
 336 }
 337
 338 /*****************************************************************************
 339  * DVDSetArea: initialize input data for title x, chapter y.
 340  * It should be called for each user navigation request, and to change
 341  * audio or sub-picture streams.
 342  * ---
 343  * Take care that i_title and i_chapter start from 0.
 344  *****************************************************************************/
 345 static int DVDSetArea( input_thread_t * p_input,
 346                        int i_title, int i_chapter,
 347                        int i_audio, int i_spu )
 348 {
 349     thread_dvd_data_t *  p_method;
 350 //    es_descriptor_t *    p_es;
 351     off_t                i_start;
 352     off_t                i_size;
 353     pgc_t *              p_pgc;
 354     int                  i_start_cell;
 355     int                  i_end_cell;
 356     int                  i_index;
 357     int                  i_cell;
 358 //    int                  i_nb;
 359 //    int                  i_id;
 360 //    int                  i;
 361
 362     p_method = (thread_dvd_data_t*)p_input->p_plugin_data;
 363
 364     /* Ifo structures reading */
 365     p_method->ifo.i_title = i_title;
 366     IfoReadVTS( &(p_method->ifo) );
 367     intf_WarnMsg( 2, "Ifo: VTS initialized" );
 368
 369     if( p_method->b_encrypted )
 370     {
 371         p_method->css.i_title = i_title;
 372         p_method->css.i_title_pos =
 373                 p_method->ifo.vts.i_pos +
 374                 p_method->ifo.vts.mat.i_tt_vobs_ssector * DVD_LB_SIZE;
 375         CSSGetKey( &(p_method->css) );
 376         intf_WarnMsg( 2, "CSS: VTS key initialized" );
 377     }
 378
 379     /* Set selected title start and size */
 380     p_pgc = &p_method->ifo.vts.pgci_ti.p_srp[0].pgc;
 381
 382     /* Find cell index in Program chain */
 383     i_index = p_pgc->prg_map.pi_entry_cell[i_chapter] - 1;
 384
 385     /* Search for cell_index in cell adress_table */
 386     i_cell = 0;
 387     while( p_pgc->p_cell_pos_inf[i_index].i_vob_id >
 388            p_method->ifo.vts.c_adt.p_cell_inf[i_cell].i_vob_id )
 389     {
 390         i_cell++;
 391     }
 392     while( p_pgc->p_cell_pos_inf[i_index].i_cell_id >
 393            p_method->ifo.vts.c_adt.p_cell_inf[i_cell].i_cell_id )
 394     {
 395         i_cell++;
 396     }
 397     i_start_cell = i_cell;
 398     i_end_cell = i_start_cell + p_pgc->i_cell_nb - 1;
 399
 400     intf_WarnMsg( 3, "DVD: Start cell: %d End Cell: %d",
 401                                             i_start_cell, i_end_cell );
 402
 403     p_method->i_start_cell = i_start_cell;
 404     p_method->i_end_cell = i_end_cell;
 405
 406     /* start is : beginning of vts + offset to vobs + offset to vob x */
 407     i_start = p_method->ifo.vts.i_pos + DVD_LB_SIZE *
 408             ( p_method->ifo.vts.mat.i_tt_vobs_ssector +
 409               p_method->ifo.vts.c_adt.p_cell_inf[i_start_cell].i_ssector );
 410
 411     i_start = lseek( p_input->i_handle, i_start, SEEK_SET );
 412     intf_WarnMsg( 2, "DVD: VOBstart at: %lld", i_start );
 413
 414     i_size = (off_t)
 415         ( p_method->ifo.vts.c_adt.p_cell_inf[i_end_cell].i_esector -
 416           p_method->ifo.vts.c_adt.p_cell_inf[i_start_cell].i_ssector + 1 )
 417         *DVD_LB_SIZE;
 418     intf_WarnMsg( 2, "DVD: stream size: %lld", i_size );
 419
 420 #if 0
 421     p_es = NULL;
 422
 423     vlc_mutex_lock( &p_input->stream.stream_lock );
 424
 425     /* ES 0 -> video MPEG2 */
 426     intf_WarnMsg( 1, "DVD: Video MPEG2 stream" );
 427     p_es = input_AddES( p_input, p_input->stream.pp_programs[0], 0xe0, 0 );
 428     p_es->i_stream_id = 0xe0;
 429     p_es->i_type = MPEG2_VIDEO_ES;
 430     input_SelectES( p_input, p_es );
 431
 432     /* Audio ES, in the order they appear in .ifo */
 433     i_nb = p_method->ifo.vts.mat.i_audio_nb;
 434     intf_WarnMsg( 1, "DVD: Audio streams %d", i_nb );
 435     for( i = 0 ; i < i_nb ; i++ )
 436     {
 437         i_id = ( ( 0x80 + i ) << 8 ) | 0xbd;
 438         p_es = input_AddES( p_input,
 439                            p_input->stream.pp_programs[0], i_id, 0 );
 440         p_es->i_stream_id = 0xbd;
 441         p_es->i_type = AC3_AUDIO_ES;
 442         p_es->b_audio = 1;
 443 //        p_es->psz_desc = p_method->ifo.vts.mat.pi_audio_attr[i];
 444         if( i == 0 )
 445         {
 446             input_SelectES( p_input, p_es );
 447         }
 448     }
 449
 450     /* Sub Picture ES */
 451     i_nb = p_method->ifo.vts.mat.i_subpic_nb;
 452     intf_WarnMsg( 1, "DVD: Subpic streams %d", i_nb );
 453     for( i = 0 ; i < i_nb ; i++ )
 454     {
 455         i_id = ( ( 0x20 + i ) << 8 ) | 0xbd;
 456         p_es = input_AddES( p_input,
 457                            p_input->stream.pp_programs[0], i_id, 0 );
 458         p_es->i_stream_id = 0xbd;
 459         p_es->i_type = DVD_SPU_ES;
 460 //        p_es->psz_desc = p_method->ifo.vts.mat.pi_subpic_attr[i];
 461         if( i == 12 )
 462         {
 463             input_SelectES( p_input, p_es );
 464         }
 465
 466     }
 467
 468     /* area definition */
 469     p_input->stream.pp_areas[i_title]->i_start = i_start;
 470     p_input->stream.pp_areas[i_title]->i_size = i_size;
 471
 472     /* No PSM to read in DVD mode */
 473     p_input->stream.pp_programs[0]->b_is_ok = 1;
 474
 475     /* Init has been successfull ; change the default area */
 476     p_input->stream.p_selected_area = p_input->stream.pp_areas[i_title];
 477
 478     vlc_mutex_unlock( &p_input->stream.stream_lock );
 479
 480 #else
 481     p_input->stream.p_selected_area = p_input->stream.pp_areas[0];
 482
 483     if( p_input->stream.b_seekable )
 484     {
 485         stream_ps_data_t * p_demux_data =
 486              (stream_ps_data_t *)p_input->stream.pp_programs[0]->p_demux_data;
 487
 488         /* Pre-parse the stream to gather stream_descriptor_t. */
 489         p_input->stream.pp_programs[0]->b_is_ok = 0;
 490         p_demux_data->i_PSM_version = EMPTY_PSM_VERSION;
 491
 492         while( !p_input->b_die && !p_input->b_error
 493                 && !p_demux_data->b_has_PSM )
 494         {
 495             int                 i_result, i;
 496             data_packet_t *     pp_packets[INPUT_READ_ONCE];
 497
 498             i_result = DVDRead( p_input, pp_packets );
 499             if( i_result == 1 )
 500             {
 501                 /* EOF */
 502                 vlc_mutex_lock( &p_input->stream.stream_lock );
 503                 p_input->stream.pp_programs[0]->b_is_ok = 1;
 504                 vlc_mutex_unlock( &p_input->stream.stream_lock );
 505                 break;
 506             }
 507             if( i_result == -1 )
 508             {
 509                 p_input->b_error = 1;
 510                 break;
 511             }
 512
 513             for( i = 0; i < INPUT_READ_ONCE && pp_packets[i] != NULL; i++ )
 514             {
 515                 /* FIXME: use i_p_config_t */
 516                 input_ParsePS( p_input, pp_packets[i] );
 517                 input_NetlistDeletePacket( p_input->p_method_data,
 518                                            pp_packets[i] );
 519             }
 520
 521             /* File too big. */
 522             if( p_input->stream.p_selected_area->i_tell >
 523                                                     INPUT_PREPARSE_LENGTH )
 524             {
 525                 break;
 526             }
 527         }
 528         lseek( p_input->i_handle, i_start, SEEK_SET );
 529         vlc_mutex_lock( &p_input->stream.stream_lock );
 530
 531         /* i_tell is an indicator from the beginning of the stream,
 532          * not of the DVD */
 533         p_input->stream.p_selected_area->i_tell = 0;
 534
 535         if( p_demux_data->b_has_PSM )
 536         {
 537             /* (The PSM decoder will care about spawning the decoders) */
 538             p_input->stream.pp_programs[0]->b_is_ok = 1;
 539         }
 540 #ifdef AUTO_SPAWN
 541         else
 542         {
 543             /* (We have to do it ourselves) */
 544             int                 i_es;
 545
 546             /* FIXME: we should do multiple passes in case an audio type
 547              * is not present */
 548             for( i_es = 0;
 549                  i_es < p_input->stream.pp_programs[0]->i_es_number;
 550                  i_es++ )
 551             {
 552 #define p_es p_input->stream.pp_programs[0]->pp_es[i_es]
 553                 switch( p_es->i_type )
 554                 {
 555                     case MPEG1_VIDEO_ES:
 556                     case MPEG2_VIDEO_ES:
 557                         input_SelectES( p_input, p_es );
 558                         break;
 559
 560                     case MPEG1_AUDIO_ES:
 561                     case MPEG2_AUDIO_ES:
 562                         if( main_GetIntVariable( INPUT_CHANNEL_VAR, 0 )
 563                                 == (p_es->i_id & 0x1F) )
 564                         switch( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) )
 565                         {
 566                         case 0:
 567                             main_PutIntVariable( INPUT_AUDIO_VAR,
 568                                                  REQUESTED_MPEG );
 569                         case REQUESTED_MPEG:
 570                             input_SelectES( p_input, p_es );
 571                         }
 572                         break;
 573
 574                     case AC3_AUDIO_ES:
 575                         if( main_GetIntVariable( INPUT_CHANNEL_VAR, 0 )
 576                                 == ((p_es->i_id & 0xF00) >> 8) )
 577                         switch( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) )
 578                         {
 579                         case 0:
 580                             main_PutIntVariable( INPUT_AUDIO_VAR,
 581                                                  REQUESTED_AC3 );
 582                         case REQUESTED_AC3:
 583                             input_SelectES( p_input, p_es );
 584                         }
 585                         break;
 586
 587                     case DVD_SPU_ES:
 588                         if( main_GetIntVariable( INPUT_SUBTITLE_VAR, -1 )
 589                                 == ((p_es->i_id & 0x1F00) >> 8) )
 590                         {
 591                             input_SelectES( p_input, p_es );
 592                         }
 593                         break;
 594
 595                     case LPCM_AUDIO_ES:
 596                         /* FIXME ! */
 597                         break;
 598                 }
 599             }
 600
 601         }
 602 #endif
 603 #ifdef STATS
 604         input_DumpStream( p_input );
 605 #endif
 606
 607         /* FIXME : ugly kludge */
 608         p_input->stream.p_selected_area->i_size = i_size;
 609
 610         vlc_mutex_unlock( &p_input->stream.stream_lock );
 611     }
 612     else
 613     {
 614         /* The programs will be added when we read them. */
 615         vlc_mutex_lock( &p_input->stream.stream_lock );
 616         p_input->stream.pp_programs[0]->b_is_ok = 0;
 617
 618         /* FIXME : ugly kludge */
 619         p_input->stream.p_selected_area->i_size = i_size;
 620
 621         vlc_mutex_unlock( &p_input->stream.stream_lock );
 622     }
 623 #endif
 624
 625     return 0;
 626 }
 627
 628 /*****************************************************************************
 629  * DVDInit: initializes DVD structures
 630  *****************************************************************************/
 631 static void DVDInit( input_thread_t * p_input )
 632 {
 633     thread_dvd_data_t *  p_method;
 634     int                  i;
 635
 636     if( (p_method = malloc( sizeof(thread_dvd_data_t) )) == NULL )
 637     {
 638         intf_ErrMsg( "Out of memory" );
 639         p_input->b_error = 1;
 640         return;
 641     }
 642
 643     p_input->p_plugin_data = (void *)p_method;
 644     p_input->p_method_data = NULL;
 645
 646     p_method->i_fd = p_input->i_handle;
 647     /* FIXME: read several packets once */
 648     p_method->i_read_once = 1;
 649     p_method->b_encrypted = DVDCheckCSS( p_input );
 650
 651     lseek( p_input->i_handle, 0, SEEK_SET );
 652
 653     /* Reading structures initialisation */
 654     input_NetlistInit( p_input, 4096, 4096, DVD_LB_SIZE,
 655                        p_method->i_read_once );
 656     intf_WarnMsg( 2, "DVD: Netlist initialized" );
 657
 658     /* Ifo initialisation */
 659     p_method->ifo = IfoInit( p_input->i_handle );
 660     intf_WarnMsg( 2, "Ifo: VMG initialized" );
 661
 662     /* CSS initialisation */
 663     if( p_method->b_encrypted )
 664     {
 665         p_method->css = CSSInit( p_input->i_handle );
 666
 667         if( ( p_input->b_error = p_method->css.b_error ) )
 668         {
 669             intf_ErrMsg( "CSS fatal error" );
 670             return;
 671         }
 672         intf_WarnMsg( 2, "CSS: initialized" );
 673     }
 674
 675     /* Initialize ES structures */
 676     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 677     input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
 678
 679     /* Set stream and area data */
 680     vlc_mutex_lock( &p_input->stream.stream_lock );
 681
 682     /* FIXME: We consider here that one title is one title set
 683      * it is not true !!! */
 684
 685 #define area p_input->stream.pp_areas
 686     /* We start from 1 here since area 0 is reserved for video_ts.vob */
 687     for( i = 1 ; i < p_method->ifo.vmg.mat.i_tts_nb ; i++ )
 688     {
 689         input_AddArea( p_input );
 690
 691         /* Should not be so simple eventually :
 692          * are title Program Chains, or still something else ? */
 693         area[i]->i_id = i;
 694
 695         /* Absolute start offset and size
 696          * We can only set that with vts ifo, so we do it during the
 697          * first call to DVDSetArea */
 698         area[i]->i_start = 0;
 699         area[i]->i_size = 0;
 700
 701         /* Number of chapter */
 702         area[i]->i_part_nb = 0;
 703         area[i]->i_part = 1;
 704         /* Offset to vts_i_0.ifo */
 705         area[i]->i_plugin_data = p_method->ifo.i_off +
 706             ( p_method->ifo.vmg.ptt_srpt.p_tts[i-1].i_ssector * DVD_LB_SIZE );
 707     }
 708 #undef area
 709
 710     vlc_mutex_unlock( &p_input->stream.stream_lock );
 711
 712     /* By default, set all parameters to 0 */
 713     /* FIXME: wrong kludge to get first title number */
 714     DVDSetArea( p_input, p_method->ifo.vmg.ptt_srpt.p_tts[0].i_tts_nb - 1,
 715                 0, 0, 0 );
 716
 717     return;
 718 }
 719
 720 /*****************************************************************************
 721  * DVDEnd: frees unused data
 722  *****************************************************************************/
 723 static void DVDEnd( input_thread_t * p_input )
 724 {
 725     /* FIXME: check order of calls */
 726 //    CSSEnd( p_input );
 727 //    IfoEnd( (ifo_t*)(&p_input->p_plugin_data->ifo ) );
 728     free( p_input->stream.p_demux_data );
 729     free( p_input->p_plugin_data );
 730     input_NetlistEnd( p_input );
 731 }
 732
 733 /*****************************************************************************
 734  * DVDRead: reads data packets into the netlist.
 735  *****************************************************************************
 736  * Returns -1 in case of error, 0 if everything went well, and 1 in case of
 737  * EOF.
 738  *****************************************************************************/
 739 static int DVDRead( input_thread_t * p_input,
 740                    data_packet_t ** pp_packets )
 741 {
 742     thread_dvd_data_t *     p_method;
 743     netlist_t *             p_netlist;
 744     struct iovec *          p_vec;
 745     struct data_packet_s *  p_data;
 746     u8 *                    pi_cur;
 747     int                     i_packet_size;
 748     int                     i_packet;
 749     int                     i_pos;
 750     int                     i;
 751     boolean_t               b_first_packet;
 752
 753     p_method = ( thread_dvd_data_t * ) p_input->p_plugin_data;
 754     p_netlist = ( netlist_t * ) p_input->p_method_data;
 755
 756     /* Get an iovec pointer */
 757     if( ( p_vec = input_NetlistGetiovec( p_netlist ) ) == NULL )
 758     {
 759         intf_ErrMsg( "DVD: read error" );
 760         return -1;
 761     }
 762
 763     /* Reads from DVD */
 764     readv( p_input->i_handle, p_vec, p_method->i_read_once );
 765
 766     if( p_method->b_encrypted )
 767     {
 768         for( i=0 ; i<p_method->i_read_once ; i++ )
 769         {
 770             CSSDescrambleSector( p_method->css.pi_title_key,
 771                                  p_vec[i].iov_base );
 772             ((u8*)(p_vec[i].iov_base))[0x14] &= 0x8F;
 773         }
 774     }
 775
 776     /* Update netlist indexes */
 777     input_NetlistMviovec( p_netlist, p_method->i_read_once, &p_data );
 778
 779     i_packet = 0;
 780     /* Read headers to compute payload length */
 781     for( i = 0 ; i < p_method->i_read_once ; i++ )
 782     {
 783         i_pos = 0;
 784         b_first_packet = 1;
 785         while( i_pos < p_netlist->i_buffer_size )
 786         {
 787             pi_cur = (u8*)(p_vec[i].iov_base + i_pos);
 788             /*default header */
 789             if( U32_AT( pi_cur ) != 0x1BA )
 790             {
 791                 /* That's the case for all packets, except pack header. */
 792                 i_packet_size = U16_AT( pi_cur + 4 );
 793             }
 794             else
 795             {
 796                 /* Pack header. */
 797                 if( ( pi_cur[4] & 0xC0 ) == 0x40 )
 798                 {
 799                     /* MPEG-2 */
 800                     i_packet_size = 8;
 801                 }
 802                 else if( ( pi_cur[4] & 0xF0 ) == 0x20 )
 803                 {
 804                     /* MPEG-1 */
 805                     i_packet_size = 6;
 806                 }
 807                 else
 808                 {
 809                     intf_ErrMsg( "Unable to determine stream type" );
 810                     return( -1 );
 811                 }
 812             }
 813             if( b_first_packet )
 814             {
 815                 p_data->b_discard_payload = 0;
 816                 b_first_packet = 0;
 817             }
 818             else
 819             {
 820                 p_data = input_NetlistNewPacket( p_netlist ,
 821                                                  i_packet_size + 6 );
 822                 memcpy( p_data->p_buffer,
 823                         p_vec[i].iov_base + i_pos , i_packet_size + 6 );
 824             }
 825
 826             p_data->p_payload_end = p_data->p_payload_start + i_packet_size + 6;
 827             pp_packets[i_packet] = p_data;
 828             i_packet++;
 829             i_pos += i_packet_size + 6;
 830         }
 831     }
 832     pp_packets[i_packet] = NULL;
 833
 834     vlc_mutex_lock( &p_input->stream.stream_lock );
 835     p_input->stream.p_selected_area->i_tell +=
 836                                         p_method->i_read_once *DVD_LB_SIZE;
 837     vlc_mutex_unlock( &p_input->stream.stream_lock );
 838
 839     return( 0 );
 840 }
 841
 842
 843 /*****************************************************************************
 844  * DVDRewind : reads a stream backward
 845  *****************************************************************************/
 846 static int DVDRewind( input_thread_t * p_input )
 847 {
 848     return( -1 );
 849 }
 850
 851 /*****************************************************************************
 852  * DVDSeek : Goes to a given position on the stream ; this one is used by the
 853  * input and translate chronological position from input to logical postion
 854  * on the device
 855  *****************************************************************************/
 856 static void DVDSeek( input_thread_t * p_input, off_t i_off )
 857 {
 858     thread_dvd_data_t *     p_method;
 859     off_t                   i_pos;
 860
 861     p_method = ( thread_dvd_data_t * )p_input->p_plugin_data;
 862
 863     /* We have to take care of offset of beginning of title */
 864     i_pos = i_off + p_input->stream.p_selected_area->i_start;
 865
 866     /* With DVD, we have to be on a sector boundary */
 867     i_pos = i_pos & (~0x7ff);
 868
 869     i_pos = lseek( p_input->i_handle, i_pos, SEEK_SET );
 870
 871     p_input->stream.p_selected_area->i_tell = i_pos -
 872                                     p_input->stream.p_selected_area->i_start;
 873
 874     return;
 875 }