git.sesse.net Git - vlc/blob - modules/access/dvdread/input.c

   1 /*****************************************************************************
   2  * input.c: DvdRead 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: libdvdread for ifo files and block reading.
   7  *****************************************************************************
   8  * Copyright (C) 2001, 2003 VideoLAN
   9  * $Id: input.c,v 1.22 2003/05/08 19:06:44 titer Exp $
  10  *
  11  * Author: Stéphane Borel <stef@via.ecp.fr>
  12  *
  13  * Some code taken form the play_title.c by Billy Biggs <vektor@dumbterm.net>
  14  * in libdvdread.
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  29  *****************************************************************************/
  30
  31 /*****************************************************************************
  32  * Preamble
  33  *****************************************************************************/
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36
  37 #include <vlc/vlc.h>
  38 #include <vlc/input.h>
  39
  40 #include "../../demux/mpeg/system.h"
  41
  42 #ifdef HAVE_UNISTD_H
  43 #   include <unistd.h>
  44 #endif
  45
  46 #include <fcntl.h>
  47 #include <sys/types.h>
  48 #include <sys/stat.h>
  49 #include <string.h>
  50 #include <errno.h>
  51 #include <assert.h>
  52
  53 #ifdef STRNCASECMP_IN_STRINGS_H
  54 #   include <strings.h>
  55 #endif
  56
  57 #if defined( WIN32 )
  58 #   include <io.h>                                                 /* read() */
  59 #endif
  60
  61 #include <dvdread/dvd_reader.h>
  62 #include <dvdread/ifo_types.h>
  63 #include <dvdread/ifo_read.h>
  64 #include <dvdread/nav_read.h>
  65 #include <dvdread/nav_print.h>
  66
  67 #include "input.h"
  68
  69 #include "iso_lang.h"
  70
  71 /* how many blocks DVDRead will read in each loop */
  72 #define DVD_BLOCK_READ_ONCE 64
  73
  74 /*****************************************************************************
  75  * Private structure
  76  *****************************************************************************/
  77 struct demux_sys_t
  78 {
  79     module_t *   p_module;
  80     mpeg_demux_t mpeg;
  81 };
  82
  83 /*****************************************************************************
  84  * Local prototypes
  85  *****************************************************************************/
  86 /* called from outside */
  87 static int     DvdReadDemux    ( input_thread_t * );
  88 static int     DvdReadRewind   ( input_thread_t * );
  89
  90 static int     DvdReadSetArea    ( input_thread_t *, input_area_t * );
  91 static int     DvdReadSetProgram ( input_thread_t *, pgrm_descriptor_t * );
  92 static ssize_t DvdReadRead       ( input_thread_t *, byte_t *, size_t );
  93 static void    DvdReadSeek       ( input_thread_t *, off_t );
  94
  95 /* called only from here */
  96 static void    DvdReadLauchDecoders( input_thread_t * p_input );
  97 static void    DvdReadHandleDSI( thread_dvd_data_t * p_dvd, uint8_t * p_data );
  98 static void    DvdReadFindCell ( thread_dvd_data_t * p_dvd );
  99
 100 /*
 101  * Data demux functions
 102  */
 103
 104 /*****************************************************************************
 105  * InitDVD: initialize DVD structures
 106  *****************************************************************************/
 107 int E_(InitDVD) ( vlc_object_t *p_this )
 108 {
 109     input_thread_t *p_input = (input_thread_t *)p_this;
 110     demux_sys_t *   p_demux;
 111
 112     if( p_input->stream.i_method != INPUT_METHOD_DVD )
 113     {
 114         return VLC_EGENERIC;
 115     }
 116
 117     p_demux = p_input->p_demux_data = malloc( sizeof(demux_sys_t ) );
 118     if( p_demux == NULL )
 119     {
 120         return VLC_ENOMEM;
 121     }
 122
 123     p_input->p_private = (void*)&p_demux->mpeg;
 124     p_demux->p_module = module_Need( p_input, "mpeg-system", NULL );
 125     if( p_demux->p_module == NULL )
 126     {
 127         free( p_input->p_demux_data );
 128         return VLC_ENOMOD;
 129     }
 130
 131     p_input->pf_demux = DvdReadDemux;
 132     p_input->pf_rewind = NULL;
 133
 134     vlc_mutex_lock( &p_input->stream.stream_lock );
 135
 136     DvdReadLauchDecoders( p_input );
 137
 138     vlc_mutex_unlock( &p_input->stream.stream_lock );
 139
 140     return VLC_SUCCESS;
 141 }
 142
 143 /*****************************************************************************
 144  * EndDVD: end DVD structures
 145  *****************************************************************************/
 146 void E_(EndDVD) ( vlc_object_t *p_this )
 147 {
 148     input_thread_t *p_input = (input_thread_t *)p_this;
 149
 150     module_Unneed( p_input, p_input->p_demux_data->p_module );
 151     free( p_input->p_demux_data );
 152 }
 153
 154 /*****************************************************************************
 155  * DvdReadDemux
 156  *****************************************************************************/
 157 #define PEEK( SIZE )                                                        \
 158     i_result = input_Peek( p_input, &p_peek, SIZE );                        \
 159     if( i_result == -1 )                                                    \
 160     {                                                                       \
 161         return -1;                                                          \
 162     }                                                                       \
 163     else if( i_result < SIZE )                                              \
 164     {                                                                       \
 165         /* EOF */                                                           \
 166         return 0;                                                           \
 167     }
 168
 169 static int DvdReadDemux( input_thread_t * p_input )
 170 {
 171     int                 i;
 172     byte_t *            p_peek;
 173     data_packet_t *     p_data;
 174     ssize_t             i_result;
 175     int                 i_packet_size;
 176
 177
 178     /* Read headers to compute payload length */
 179     for( i = 0 ; i < DVD_BLOCK_READ_ONCE ; i++ )
 180     {
 181
 182         /* Read what we believe to be a packet header. */
 183         PEEK( 4 );
 184
 185         /* Default header */
 186         if( U32_AT( p_peek ) != 0x1BA )
 187         {
 188             /* That's the case for all packets, except pack header. */
 189             i_packet_size = U16_AT( p_peek + 4 );
 190         }
 191         else
 192         {
 193             /* MPEG-2 Pack header. */
 194             i_packet_size = 8;
 195         }
 196
 197         /* Fetch a packet of the appropriate size. */
 198         i_result = input_SplitBuffer( p_input, &p_data, i_packet_size + 6 );
 199         if( i_result <= 0 )
 200         {
 201             return( i_result );
 202         }
 203
 204         /* In MPEG-2 pack headers we still have to read stuffing bytes. */
 205         if( (p_data->p_demux_start[3] == 0xBA) && (i_packet_size == 8) )
 206         {
 207             ssize_t i_stuffing = (p_data->p_demux_start[13] & 0x7);
 208             /* Force refill of the input buffer - though we don't care
 209              * about p_peek. Please note that this is unoptimized. */
 210             PEEK( i_stuffing );
 211             p_input->p_current_data += i_stuffing;
 212         }
 213
 214         p_input->p_demux_data->mpeg.pf_demux_ps( p_input, p_data );
 215
 216     }
 217
 218     return i;
 219 }
 220
 221 /*****************************************************************************
 222  * DVDRewind : reads a stream backward
 223  *****************************************************************************/
 224 static int DvdReadRewind( input_thread_t * p_input )
 225 {
 226     return -1;
 227 }
 228
 229 /*
 230  * Data access functions
 231  */
 232
 233 /*****************************************************************************
 234  * OpenDVD: open libdvdread
 235  *****************************************************************************/
 236 int E_(OpenDVD) ( vlc_object_t *p_this )
 237 {
 238     input_thread_t *        p_input = (input_thread_t *)p_this;
 239     char *                  psz_parser;
 240     char *                  psz_source;
 241     char *                  psz_next;
 242     struct stat             stat_info;
 243     thread_dvd_data_t *     p_dvd;
 244     dvd_reader_t *          p_dvdread;
 245     input_area_t *          p_area;
 246     unsigned int            i_title = 1;
 247     unsigned int            i_chapter = 1;
 248     unsigned int            i_angle = 1;
 249     unsigned int            i;
 250
 251     psz_source = strdup( p_input->psz_name );
 252     if( psz_source == NULL )
 253     {
 254         return VLC_ENOMEM;
 255     }
 256
 257     p_input->pf_read = DvdReadRead;
 258     p_input->pf_seek = DvdReadSeek;
 259     p_input->pf_set_area = DvdReadSetArea;
 260     p_input->pf_set_program = DvdReadSetProgram;
 261
 262     /* Start with the end, because you could have :
 263      * dvdread:/Volumes/my@toto/VIDEO_TS@1,1
 264      * (yes, this is kludgy). */
 265     for ( psz_parser = psz_source + strlen(psz_source) - 1;
 266           psz_parser >= psz_source && *psz_parser != '@';
 267           psz_parser-- );
 268
 269     if( psz_parser >= psz_source && *psz_parser == '@' )
 270     {
 271         /* Found options */
 272         *psz_parser = '\0';
 273         ++psz_parser;
 274
 275         i_title = (int)strtol( psz_parser, &psz_next, 10 );
 276         if( *psz_next )
 277         {
 278             psz_parser = psz_next + 1;
 279             i_chapter = (int)strtol( psz_parser, &psz_next, 10 );
 280             if( *psz_next )
 281             {
 282                 i_angle = (int)strtol( psz_next + 1, NULL, 10 );
 283             }
 284         }
 285
 286         i_title = i_title ? i_title : 1;
 287         i_chapter = i_chapter ? i_chapter : 1;
 288         i_angle = i_angle ? i_angle : 1;
 289     }
 290
 291     if( !*psz_source )
 292     {
 293         free( psz_source );
 294         if( !p_input->psz_access )
 295         {
 296             return VLC_EGENERIC;
 297         }
 298         psz_source = config_GetPsz( p_input, "dvd" );
 299         if( !psz_source ) return VLC_EGENERIC;
 300     }
 301
 302     if( stat( psz_source, &stat_info ) == -1 )
 303     {
 304         msg_Warn( p_input, "cannot stat() source `%s' (%s)",
 305                            psz_source, strerror(errno) );
 306         free( psz_source );
 307         return VLC_EGENERIC;
 308     }
 309     if( !S_ISBLK(stat_info.st_mode) &&
 310         !S_ISCHR(stat_info.st_mode) &&
 311         !S_ISDIR(stat_info.st_mode) )
 312     {
 313         msg_Warn( p_input, "dvdread module discarded (not a valid source)" );
 314         free( psz_source );
 315         return VLC_EGENERIC;
 316     }
 317
 318     msg_Dbg( p_input, "dvdroot=%s title=%d chapter=%d angle=%d",
 319                       psz_source, i_title, i_chapter, i_angle );
 320
 321
 322     p_dvdread = DVDOpen( psz_source );
 323
 324     /* free allocated strings */
 325     free( psz_source );
 326
 327     if( ! p_dvdread )
 328     {
 329         msg_Err( p_input, "libdvdcss cannot open source" );
 330         return VLC_EGENERIC;
 331     }
 332
 333     /* set up input  */
 334     p_input->i_mtu = 0;
 335
 336     p_dvd = malloc( sizeof(thread_dvd_data_t) );
 337     if( p_dvd == NULL )
 338     {
 339         msg_Err( p_input, "out of memory" );
 340         return VLC_ENOMEM;
 341     }
 342
 343     p_dvd->p_dvdread = p_dvdread;
 344     p_dvd->p_title = NULL;
 345     p_dvd->p_vts_file = NULL;
 346
 347
 348     p_input->p_access_data = (void *)p_dvd;
 349
 350     /* Ifo allocation & initialisation */
 351     if( ! ( p_dvd->p_vmg_file = ifoOpen( p_dvd->p_dvdread, 0 ) ) )
 352     {
 353         msg_Warn( p_input, "cannot open VMG info" );
 354         free( p_dvd );
 355         return VLC_EGENERIC;
 356     }
 357     msg_Dbg( p_input, "VMG opened" );
 358
 359     /* Set stream and area data */
 360     vlc_mutex_lock( &p_input->stream.stream_lock );
 361
 362     p_input->stream.i_method = INPUT_METHOD_DVD;
 363
 364     /* If we are here we can control the pace... */
 365     p_input->stream.b_pace_control = VLC_TRUE;
 366     p_input->stream.b_seekable = VLC_TRUE;
 367
 368     p_input->stream.p_selected_area->i_size = 0;
 369     p_input->stream.p_selected_area->i_tell = 0;
 370
 371     /* Initialize ES structures */
 372     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 373
 374     /* disc input method */
 375     p_input->stream.i_method = INPUT_METHOD_DVD;
 376
 377 #define tt_srpt p_dvd->p_vmg_file->tt_srpt
 378     msg_Dbg( p_input, "number of titles: %d", tt_srpt->nr_of_srpts );
 379
 380 #define area p_input->stream.pp_areas
 381     /* We start from 1 here since the default area 0
 382      * is reserved for video_ts.vob */
 383     for( i = 1 ; i <= tt_srpt->nr_of_srpts ; i++ )
 384     {
 385         /* Titles are Program Chains */
 386         input_AddArea( p_input, i, tt_srpt->title[i-1].nr_of_ptts );
 387
 388         /* Absolute start offset and size
 389          * We can only set that with vts ifo, so we do it during the
 390          * first call to DVDSetArea */
 391         area[i]->i_start = 0;
 392         area[i]->i_size = 0;
 393
 394         /* Default Chapter */
 395         area[i]->i_part = 1;
 396
 397         area[i]->i_plugin_data = tt_srpt->title[i-1].title_set_nr;
 398     }
 399 #undef area
 400
 401     p_dvd->i_title = i_title <= tt_srpt->nr_of_srpts ? i_title : 1;
 402 #undef tt_srpt
 403
 404     p_area = p_input->stream.pp_areas[p_dvd->i_title];
 405     p_dvd->i_chapter = i_chapter;
 406
 407     p_dvd->i_chapter = i_chapter < p_area->i_part_nb ? i_chapter : 1;
 408     p_area->i_part = p_dvd->i_chapter;
 409
 410     p_dvd->i_angle = i_angle;
 411
 412     /* set title, chapter, audio and subpic */
 413     if( DvdReadSetArea( p_input, p_area ) )
 414     {
 415         vlc_mutex_unlock( &p_input->stream.stream_lock );
 416         return VLC_EGENERIC;
 417     }
 418
 419     vlc_mutex_unlock( &p_input->stream.stream_lock );
 420
 421     if( !p_input->psz_demux || !*p_input->psz_demux )
 422     {
 423         p_input->psz_demux = "dvdread";
 424     }
 425
 426     return VLC_SUCCESS;
 427 }
 428
 429 /*****************************************************************************
 430  * CloseDVD: close libdvdread
 431  *****************************************************************************/
 432 void E_(CloseDVD) ( vlc_object_t *p_this )
 433 {
 434     input_thread_t *    p_input = (input_thread_t *)p_this;
 435     thread_dvd_data_t * p_dvd = (thread_dvd_data_t *)p_input->p_access_data;
 436
 437     /* This is a very nasty side-effect in the DVD plug-in : language
 438      * selection here influences language selection of other streams. So
 439      * unset those variables (may not be what the user wants).
 440      * FIXME FIXME FIXME FIXME FIXME FIXME FIXME --Meuuh */
 441     config_PutInt( p_input, "audio-channel", -1 );
 442     config_PutInt( p_input, "spu-channel", -1 );
 443
 444     /* close libdvdread */
 445     DVDCloseFile( p_dvd->p_title );
 446     ifoClose( p_dvd->p_vts_file );
 447     ifoClose( p_dvd->p_vmg_file );
 448
 449     DVDClose( p_dvd->p_dvdread );
 450     free( p_dvd );
 451     p_input->p_access_data = NULL;
 452
 453 }
 454
 455 /*****************************************************************************
 456  * DvdReadSetProgram: Does nothing, a DVD is mono-program
 457  *****************************************************************************/
 458 static int DvdReadSetProgram( input_thread_t * p_input,
 459                               pgrm_descriptor_t * p_program )
 460 {
 461     if( p_input->stream.p_selected_program != p_program )
 462     {
 463         thread_dvd_data_t *  p_dvd;
 464         vlc_value_t val;
 465
 466         p_dvd = (thread_dvd_data_t*)(p_input->p_access_data);
 467         p_dvd->i_angle = p_program->i_number;
 468
 469         memcpy( p_program, p_input->stream.p_selected_program,
 470                 sizeof(pgrm_descriptor_t) );
 471         p_program->i_number = p_dvd->i_angle;
 472         p_input->stream.p_selected_program = p_program;
 473
 474         msg_Dbg( p_input, "angle %d selected", p_dvd->i_angle );
 475
 476         /* Update the navigation variables without triggering a callback */
 477         val.i_int = p_program->i_number;
 478         var_Change( p_input, "program", VLC_VAR_SETVALUE, &val, NULL );
 479     }
 480
 481     return VLC_SUCCESS;
 482 }
 483
 484 #define p_pgc         p_dvd->p_cur_pgc
 485
 486 /*****************************************************************************
 487  * DvdReadSetArea: initialize input data for title x, chapter y.
 488  * It should be called for each user navigation request.
 489  *****************************************************************************
 490  * Take care that i_title starts from 0 (vmg) and i_chapter start from 1.
 491  * Note that you have to take the lock before entering here.
 492  *****************************************************************************/
 493 static int DvdReadSetArea( input_thread_t * p_input, input_area_t * p_area )
 494 {
 495     thread_dvd_data_t *  p_dvd;
 496     int                  pgc_id = 0;
 497     int                  pgn = 0;
 498     vlc_value_t          val;
 499
 500     p_dvd = (thread_dvd_data_t*)p_input->p_access_data;
 501
 502     /* we can't use the interface slider until initilization is complete */
 503     p_input->stream.b_seekable = VLC_FALSE;
 504
 505     if( p_area != p_input->stream.p_selected_area )
 506     {
 507         es_descriptor_t *    p_es;
 508         unsigned int         i_cell = 0;
 509         unsigned int         i_audio_nb = 0;
 510         unsigned int         i_spu_nb = 0;
 511         unsigned int         i;
 512
 513 #define p_vmg         p_dvd->p_vmg_file
 514 #define p_vts         p_dvd->p_vts_file
 515         if( p_dvd->p_title != NULL )
 516         {
 517             DVDCloseFile( p_dvd->p_title );
 518         }
 519
 520         if( p_vts != NULL )
 521         {
 522             ifoClose( p_vts );
 523         }
 524
 525         /* Reset the Chapter position of the old title */
 526         p_input->stream.p_selected_area->i_part = 1;
 527
 528         /*
 529          *  We have to load all title information
 530          */
 531         /* Change the default area */
 532         p_input->stream.p_selected_area = p_area;
 533
 534         msg_Dbg( p_input, "open VTS %d, for title %d",
 535             p_vmg->tt_srpt->title[ p_area->i_id - 1 ].title_set_nr,
 536             p_area->i_id );
 537
 538         /* ifo vts */
 539         if( ! ( p_vts = ifoOpen( p_dvd->p_dvdread,
 540                 p_vmg->tt_srpt->title[ p_area->i_id - 1 ].title_set_nr ) ) )
 541         {
 542             msg_Err( p_input, "fatal error in vts ifo" );
 543             ifoClose( p_vmg );
 544             DVDClose( p_dvd->p_dvdread );
 545             return VLC_EGENERIC;
 546         }
 547
 548         /* title position inside the selected vts */
 549         p_dvd->i_ttn = p_vmg->tt_srpt->title[ p_area->i_id - 1 ].vts_ttn;
 550
 551         /*
 552          * Set selected title start
 553          */
 554         pgc_id = p_vts->vts_ptt_srpt->title[p_dvd->i_ttn-1].ptt[0].pgcn;
 555         pgn = p_vts->vts_ptt_srpt->title[p_dvd->i_ttn-1].ptt[0].pgn;
 556         p_pgc = p_vts->vts_pgcit->pgci_srp[ pgc_id - 1 ].pgc;
 557         i_cell = p_pgc->program_map[ pgn - 1 ] - 1;
 558
 559         p_area->i_start =
 560             LB2OFF( p_dvd->p_cur_pgc->cell_playback[ i_cell ].first_sector );
 561
 562         msg_Dbg( p_input, "start %d vts_title %d pgc %d pgn %d",
 563                   p_area->i_id, p_dvd->i_ttn, pgc_id, pgn );
 564
 565         /*
 566          * Find title end
 567          */
 568         i_cell = p_dvd->p_cur_pgc->nr_of_cells - 1;
 569
 570         p_dvd->i_end_block = p_pgc->cell_playback[ i_cell ].last_sector;
 571         p_area->i_size = LB2OFF( p_dvd->i_end_block )- p_area->i_start;
 572
 573         msg_Dbg( p_input, "start "I64Fd" size "I64Fd" end %d",
 574                   p_area->i_start , p_area->i_size, p_dvd->i_end_block );
 575
 576         /*
 577          * Set properties for current chapter
 578          */
 579         /* Remeber current chapter */
 580         p_dvd->i_chapter = p_area->i_part;
 581         p_dvd->b_eoc = VLC_FALSE;
 582
 583         pgc_id = p_vts->vts_ptt_srpt->title[
 584                     p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgcn;
 585         pgn = p_vts->vts_ptt_srpt->title[
 586                     p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgn;
 587
 588         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id-1].pgc;
 589         p_dvd->i_pack_len = 0;
 590         p_dvd->i_next_cell = p_dvd->i_cur_cell = p_pgc->program_map[pgn-1] - 1;
 591         DvdReadFindCell( p_dvd );
 592
 593         p_dvd->i_next_vobu = p_dvd->i_cur_block =
 594             p_pgc->cell_playback[p_dvd->i_cur_cell].first_sector;
 595
 596         /*
 597          * Angle management
 598          */
 599         p_dvd->i_angle_nb = p_vmg->tt_srpt->title[p_area->i_id-1].nr_of_angles;
 600
 601         if( p_dvd->i_angle > p_dvd->i_angle_nb )
 602         {
 603             p_dvd->i_angle = 1;
 604         }
 605
 606         /*
 607          * We've got enough info, time to open the title set data.
 608          */
 609         if( ! ( p_dvd->p_title = DVDOpenFile( p_dvd->p_dvdread,
 610             p_vmg->tt_srpt->title[ p_area->i_id - 1 ].title_set_nr,
 611             DVD_READ_TITLE_VOBS ) ) )
 612         {
 613             msg_Err( p_input, "cannot open title (VTS_%02d_1.VOB)",
 614                      p_vmg->tt_srpt->title[p_area->i_id-1].title_set_nr );
 615             ifoClose( p_vts );
 616             ifoClose( p_vmg );
 617             DVDClose( p_dvd->p_dvdread );
 618             return VLC_EGENERIC;
 619         }
 620
 621 //        IfoPrintTitle( p_dvd );
 622
 623         /*
 624          * Destroy obsolete ES by reinitializing program 0
 625          * and find all ES in title with ifo data
 626          */
 627         if( p_input->stream.pp_programs != NULL )
 628         {
 629             /* We don't use input_EndStream here since
 630              * we keep area structures */
 631
 632             while( p_input->stream.i_es_number )
 633             {
 634                 input_DelES( p_input, p_input->stream.pp_es[0] );
 635             }
 636
 637             while( p_input->stream.i_pgrm_number )
 638             {
 639                 input_DelProgram( p_input, p_input->stream.pp_programs[0] );
 640             }
 641
 642             if( p_input->stream.pp_selected_es )
 643             {
 644                 free( p_input->stream.pp_selected_es );
 645                 p_input->stream.pp_selected_es = NULL;
 646             }
 647             p_input->stream.i_selected_es_number = 0;
 648         }
 649
 650         input_AddProgram( p_input, 1, sizeof( stream_ps_data_t ) );
 651         p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 652
 653         for( i = 1 ; i < p_dvd->i_angle_nb ; i++ )
 654         {
 655             input_AddProgram( p_input, i+1, 0 );
 656         }
 657
 658         DvdReadSetProgram( p_input,
 659                            p_input->stream.pp_programs[p_dvd->i_angle-1] );
 660
 661         /* No PSM to read in DVD mode, we already have all information */
 662         p_input->stream.p_selected_program->b_is_ok = VLC_TRUE;
 663
 664         p_es = NULL;
 665
 666         /* ES 0 -> video MPEG2 */
 667 //        IfoPrintVideo( p_dvd );
 668
 669         p_es = input_AddES( p_input, NULL, 0xe0, VIDEO_ES, NULL, 0 );
 670         p_es->i_stream_id = 0xe0;
 671         p_es->i_fourcc = VLC_FOURCC('m','p','g','v');
 672
 673 #define audio_control \
 674     p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->audio_control[i-1]
 675         /* Audio ES, in the order they appear in .ifo */
 676         for( i = 1 ; i <= p_vts->vtsi_mat->nr_of_vts_audio_streams ; i++ )
 677         {
 678             int i_position = 0;
 679             uint16_t i_id;
 680
 681 //            IfoPrintAudio( p_dvd, i );
 682
 683             /* audio channel is active if first byte is 0x80 */
 684             if( audio_control & 0x8000 )
 685             {
 686                 i_audio_nb++;
 687                 i_position = ( audio_control & 0x7F00 ) >> 8;
 688
 689                 msg_Dbg( p_input, "audio position  %d", i_position );
 690                 switch( p_vts->vtsi_mat->vts_audio_attr[i-1].audio_format )
 691                 {
 692                 case 0x00:              /* A52 */
 693                     i_id = ( ( 0x80 + i_position ) << 8 ) | 0xbd;
 694                     p_es = input_AddES( p_input, NULL, i_id, AUDIO_ES,
 695                                         DecodeLanguage(
 696                         p_vts->vtsi_mat->vts_audio_attr[i-1].lang_code ), 0 );
 697                     p_es->i_stream_id = 0xbd;
 698                     p_es->i_fourcc = VLC_FOURCC('a','5','2','b');
 699
 700                     break;
 701                 case 0x02:
 702                 case 0x03:              /* MPEG audio */
 703                     i_id = 0xc0 + i_position;
 704                     p_es = input_AddES( p_input, NULL, i_id, AUDIO_ES,
 705                                         DecodeLanguage(
 706                         p_vts->vtsi_mat->vts_audio_attr[i-1].lang_code ), 0 );
 707                     p_es->i_stream_id = i_id;
 708                     p_es->i_fourcc = VLC_FOURCC('m','p','g','a');
 709
 710                     break;
 711                 case 0x04:              /* LPCM */
 712
 713                     i_id = ( ( 0xa0 + i_position ) << 8 ) | 0xbd;
 714                     p_es = input_AddES( p_input, NULL, i_id, AUDIO_ES,
 715                                         DecodeLanguage(
 716                         p_vts->vtsi_mat->vts_audio_attr[i-1].lang_code ), 0 );
 717                     p_es->i_stream_id = i_id;
 718                     p_es->i_fourcc = VLC_FOURCC('l','p','c','b');
 719
 720                     break;
 721                 case 0x06:              /* DTS */
 722                     i_id = ( ( 0x88 + i_position ) << 8 ) | 0xbd;
 723                     msg_Err( p_input, "DTS audio not handled yet"
 724                                       "(0x%x)", i_id );
 725                     break;
 726                 default:
 727                     i_id = 0;
 728                     msg_Err( p_input, "unknown audio type %.2x",
 729                           p_vts->vtsi_mat->vts_audio_attr[i-1].audio_format );
 730                 }
 731             }
 732         }
 733 #undef audio_control
 734 #define spu_control \
 735     p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->subp_control[i-1]
 736
 737         /* Sub Picture ES */
 738
 739         for( i = 1 ; i <= p_vts->vtsi_mat->nr_of_vts_subp_streams; i++ )
 740         {
 741             int i_position = 0;
 742             uint16_t i_id;
 743
 744 //            IfoPrintSpu( p_dvd, i );
 745             msg_Dbg( p_input, "spu %d 0x%02x", i, spu_control );
 746
 747             if( spu_control & 0x80000000 )
 748             {
 749                 i_spu_nb++;
 750
 751                 /*  there are several streams for one spu */
 752                 if(  p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
 753                 {
 754                     /* 16:9 */
 755                     switch( p_vts->vtsi_mat->vts_video_attr.permitted_df )
 756                     {
 757                     case 1:
 758                         i_position = spu_control & 0xff;
 759                         break;
 760                     case 2:
 761                         i_position = ( spu_control >> 8 ) & 0xff;
 762                         break;
 763                     default:
 764                         i_position = ( spu_control >> 16 ) & 0xff;
 765                         break;
 766                     }
 767                 }
 768                 else
 769                 {
 770                     /* 4:3 */
 771                     i_position = ( spu_control >> 24 ) & 0x7F;
 772                 }
 773
 774                 i_id = ( ( 0x20 + i_position ) << 8 ) | 0xbd;
 775                 p_es = input_AddES( p_input, NULL, i_id, SPU_ES,
 776                                     DecodeLanguage(
 777                     p_vts->vtsi_mat->vts_subp_attr[i-1].lang_code ), 0 );
 778                 p_es->i_stream_id = 0xbd;
 779                 p_es->i_fourcc = VLC_FOURCC('s','p','u','b');
 780             }
 781         }
 782 #undef spu_control
 783
 784         /* FIXME: hack to check that the demuxer is ready, and set
 785          * the decoders */
 786         if( p_input->p_demux )
 787         {
 788             DvdReadLauchDecoders( p_input );
 789         }
 790
 791         /* Update the navigation variables without triggering a callback */
 792         val.i_int = p_area->i_id;
 793         var_Change( p_input, "title", VLC_VAR_SETVALUE, &val, NULL );
 794         var_Change( p_input, "chapter", VLC_VAR_CLEARCHOICES, NULL, NULL );
 795         for( i = 1; i <= p_area->i_part_nb; i++ )
 796         {
 797             val.i_int = i;
 798             var_Change( p_input, "chapter", VLC_VAR_ADDCHOICE, &val, NULL );
 799         }
 800
 801     } /* i_title >= 0 */
 802     else
 803     {
 804         p_area = p_input->stream.p_selected_area;
 805     }
 806
 807     /*
 808      * Chapter selection
 809      */
 810
 811     if( p_area->i_part != p_dvd->i_chapter )
 812     {
 813         if( ( p_area->i_part > 0 ) &&
 814             ( p_area->i_part <= p_area->i_part_nb ))
 815         {
 816             p_dvd->i_ttn = p_vmg->tt_srpt->title[p_area->i_id-1].vts_ttn;
 817             pgc_id = p_vts->vts_ptt_srpt->title[
 818                         p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgcn;
 819             pgn = p_vts->vts_ptt_srpt->title[
 820                         p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgn;
 821
 822             p_pgc = p_vts->vts_pgcit->pgci_srp[ pgc_id - 1 ].pgc;
 823
 824             p_dvd->i_cur_cell = p_pgc->program_map[ pgn - 1 ] - 1;
 825             p_dvd->i_chapter = p_area->i_part;
 826             DvdReadFindCell( p_dvd );
 827
 828             p_dvd->i_pack_len = 0;
 829             p_dvd->i_next_vobu = p_dvd->i_cur_block =
 830                     p_pgc->cell_playback[p_dvd->i_cur_cell].first_sector;
 831         }
 832         else
 833         {
 834             p_area->i_part = p_dvd->i_chapter;
 835         }
 836     }
 837 #undef p_vts
 838 #undef p_vmg
 839
 840     /* warn interface that something has changed */
 841     p_area->i_tell = LB2OFF( p_dvd->i_next_vobu ) - p_area->i_start;
 842     p_input->stream.b_seekable = VLC_TRUE;
 843     p_input->stream.b_changed = VLC_TRUE;
 844
 845     /* Update the navigation variables without triggering a callback */
 846     val.i_int = p_area->i_part;
 847     var_Change( p_input, "chapter", VLC_VAR_SETVALUE, &val, NULL );
 848
 849     return VLC_SUCCESS;
 850 }
 851
 852
 853 /*****************************************************************************
 854  * DvdReadRead: reads data packets.
 855  *****************************************************************************
 856  * Returns -1 in case of error, 0 in case of EOF, otherwise the number of
 857  * bytes.
 858  *****************************************************************************/
 859 static ssize_t DvdReadRead( input_thread_t * p_input,
 860                             byte_t * p_buffer, size_t i_count )
 861 {
 862     thread_dvd_data_t *     p_dvd;
 863     byte_t *                p_buf;
 864     unsigned int            i_blocks_once;
 865     unsigned int            i_blocks;
 866     int                     i_read;
 867     int                     i_read_total;
 868     vlc_bool_t              b_eot = VLC_FALSE;
 869
 870     p_dvd = (thread_dvd_data_t *)p_input->p_access_data;
 871     p_buf = p_buffer;
 872
 873     /*
 874      * Playback by cell in this pgc, starting at the cell for our chapter.
 875      */
 876     i_blocks = OFF2LB( i_count );
 877     i_read_total = 0;
 878     i_read = 0;
 879
 880     while( i_blocks )
 881     {
 882         /*
 883          * End of pack, we select the following one
 884          */
 885         if( ! p_dvd->i_pack_len )
 886         {
 887             /*
 888              * Read NAV packet.
 889              */
 890             if( ( i_read = DVDReadBlocks( p_dvd->p_title, p_dvd->i_next_vobu,
 891                            1, p_buf ) ) != 1 )
 892             {
 893                 msg_Err( p_input, "read failed for block %d",
 894                                   p_dvd->i_next_vobu );
 895                 return -1;
 896             }
 897
 898             /* basic check to be sure we don't have a empty title
 899              * go to next title if so */
 900             //assert( p_buffer[41] == 0xbf && p_buffer[1027] == 0xbf );
 901
 902             /*
 903              * Parse the contained dsi packet.
 904              */
 905
 906             DvdReadHandleDSI( p_dvd, p_buf );
 907
 908             /* End of title */
 909             if( p_dvd->i_next_vobu >= p_dvd->i_end_block + 1 )
 910             {
 911                 b_eot = 1;
 912                 break;
 913             }
 914
 915             assert( p_dvd->i_pack_len < 1024 );
 916             /* FIXME: Ugly kludge: we send the pack block to the input for it
 917              * sometimes has a zero scr and restart the sync */
 918             p_dvd->i_cur_block ++;
 919             //p_dvd->i_pack_len++;
 920
 921             i_read_total++;
 922             p_buf += DVD_VIDEO_LB_LEN;
 923             i_blocks--;
 924         }
 925
 926         /*
 927          * Compute the number of blocks to read
 928          */
 929         i_blocks_once = __MIN( p_dvd->i_pack_len, i_blocks );
 930         p_dvd->i_pack_len -= i_blocks_once;
 931
 932         /* Reads from DVD */
 933         i_read = DVDReadBlocks( p_dvd->p_title, p_dvd->i_cur_block,
 934                                 i_blocks_once, p_buf );
 935         if( (unsigned int)i_read != i_blocks_once )
 936         {
 937             msg_Err( p_input, "read failed for %d/%d blocks at 0x%02x",
 938                               i_read, i_blocks_once, p_dvd->i_cur_block );
 939             return -1;
 940         }
 941
 942         i_blocks -= i_read;
 943         i_read_total += i_read;
 944         p_dvd->i_cur_block += i_read;
 945         p_buf += LB2OFF( i_read );
 946
 947     }
 948 /*
 949     msg_Dbg( p_input, "i_blocks: %d len: %d current: 0x%02x", i_read, p_dvd->i_pack_len, p_dvd->i_cur_block );
 950 */
 951
 952     vlc_mutex_lock( &p_input->stream.stream_lock );
 953
 954     if( p_dvd->b_eoc )
 955     {
 956         /* We modify i_part only at end of chapter not to erase
 957          * some modification from the interface */
 958         p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 959         p_dvd->b_eoc = VLC_FALSE;
 960     }
 961
 962     if( ( LB2OFF( p_dvd->i_cur_block )
 963           - p_input->stream.p_selected_area->i_start )
 964             >= p_input->stream.p_selected_area->i_size || b_eot )
 965     {
 966         if( ( p_input->stream.p_selected_area->i_id + 1 ) >=
 967                         p_input->stream.i_area_nb )
 968         {
 969             /* EOF */
 970             vlc_mutex_unlock( &p_input->stream.stream_lock );
 971             return 0;
 972         }
 973
 974         /* EOT */
 975         msg_Dbg( p_input, "new title" );
 976         DvdReadSetArea( p_input, p_input->stream.pp_areas[
 977                         p_input->stream.p_selected_area->i_id+1] );
 978     }
 979
 980     vlc_mutex_unlock( &p_input->stream.stream_lock );
 981
 982     return LB2OFF( i_read_total );
 983 }
 984 #undef p_pgc
 985
 986 /*****************************************************************************
 987  * DvdReadSeek : Goes to a given position on the stream.
 988  *****************************************************************************
 989  * This one is used by the input and translate chronological position from
 990  * input to logical position on the device.
 991  * The lock should be taken before calling this function.
 992  *****************************************************************************/
 993 static void DvdReadSeek( input_thread_t * p_input, off_t i_off )
 994 {
 995     thread_dvd_data_t *     p_dvd;
 996     unsigned int            i_lb;
 997     unsigned int            i_tmp;
 998     unsigned int            i_chapter = 0;
 999     unsigned int            i_cell = 0;
1000     unsigned int            i_vobu = 0;
1001     unsigned int            i_sub_cell = 0;
1002
1003     vlc_mutex_lock( &p_input->stream.stream_lock );
1004     i_off += p_input->stream.p_selected_area->i_start;
1005     vlc_mutex_unlock( &p_input->stream.stream_lock );
1006
1007     i_lb = OFF2LB( i_off );
1008     p_dvd = ( thread_dvd_data_t * )p_input->p_access_data;
1009
1010     /* find cell */
1011     while( p_dvd->p_cur_pgc->cell_playback[i_cell].last_sector < i_lb )
1012     {
1013         i_cell++;
1014     }
1015
1016     /* find chapter */
1017     do
1018     {
1019         pgc_t *     p_pgc;
1020         int         pgc_id, pgn;
1021
1022         i_chapter++;
1023         pgc_id = p_dvd->p_vts_file->vts_ptt_srpt->title[
1024                     p_dvd->i_ttn-1].ptt[i_chapter-1].pgcn;
1025         pgn = p_dvd->p_vts_file->vts_ptt_srpt->title[
1026                     p_dvd->i_ttn-1].ptt[i_chapter-1].pgn;
1027
1028         p_pgc = p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc;
1029         i_tmp = p_pgc->program_map[pgn-1];
1030
1031     } while( i_tmp <= i_cell );
1032
1033     /* find vobu */
1034     while( p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu]
1035             <= i_lb )
1036     {
1037         i_vobu++;
1038     }
1039
1040     /* find sub_cell */
1041     while( p_dvd->p_vts_file->vts_c_adt->cell_adr_table[i_sub_cell].start_sector <
1042             p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu-1] )
1043     {
1044         i_sub_cell++;
1045     }
1046
1047 /*
1048     msg_Dbg( p_input, "cell %d i_sub_cell %d chapter %d vobu %d cell_sector %d vobu_sector %d sub_cell_sector %d",
1049             i_cell, i_sub_cell,i_chapter, i_vobu,
1050             p_dvd->p_cur_pgc->cell_playback[i_cell].first_sector,
1051             p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu],
1052             p_dvd->p_vts_file->vts_c_adt->cell_adr_table[i_sub_cell-1].start_sector);
1053 */
1054     p_dvd->i_cur_block = i_lb;
1055     p_dvd->i_next_vobu =
1056         p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu];
1057     p_dvd->i_pack_len = p_dvd->i_next_vobu - i_lb;
1058     p_dvd->i_cur_cell = i_cell;
1059     p_dvd->i_chapter = i_chapter;
1060     DvdReadFindCell( p_dvd );
1061
1062     vlc_mutex_lock( &p_input->stream.stream_lock );
1063     p_input->stream.p_selected_area->i_tell =
1064         LB2OFF ( p_dvd->i_cur_block )
1065          - p_input->stream.p_selected_area->i_start;
1066     p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
1067     vlc_mutex_unlock( &p_input->stream.stream_lock );
1068
1069     return;
1070 }
1071
1072 /*****************************************************************************
1073  * DvdReadHandleDSI
1074  *****************************************************************************/
1075 static void DvdReadHandleDSI( thread_dvd_data_t * p_dvd, uint8_t * p_data )
1076 {
1077     navRead_DSI( &(p_dvd->dsi_pack), &(p_data[ DSI_START_BYTE ]) );
1078
1079     /*
1080      * Determine where we go next.  These values are the ones we mostly
1081      * care about.
1082      */
1083     p_dvd->i_cur_block = p_dvd->dsi_pack.dsi_gi.nv_pck_lbn;
1084
1085     /*
1086      * If we're not at the end of this cell, we can determine the next
1087      * VOBU to display using the VOBU_SRI information section of the
1088      * DSI.  Using this value correctly follows the current angle,
1089      * avoiding the doubled scenes in The Matrix, and makes our life
1090      * really happy.
1091      */
1092     if( p_dvd->dsi_pack.vobu_sri.next_vobu != SRI_END_OF_CELL )
1093     {
1094 #if 1
1095         switch( ( p_dvd->dsi_pack.sml_pbi.category & 0xf000 ) >> 12 )
1096         {
1097             case 0x4:
1098                 /* interleaved unit with no angle */
1099                 if( p_dvd->dsi_pack.sml_pbi.ilvu_sa != 0 )
1100                 {
1101                     p_dvd->i_next_vobu = p_dvd->i_cur_block +
1102                         p_dvd->dsi_pack.sml_pbi.ilvu_sa;
1103                     p_dvd->i_pack_len = p_dvd->dsi_pack.sml_pbi.ilvu_ea;
1104                 }
1105                 else
1106                 {
1107                     p_dvd->i_next_vobu = p_dvd->i_cur_block +
1108                         p_dvd->dsi_pack.dsi_gi.vobu_ea + 1;
1109                     p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1110                 }
1111                 break;
1112             case 0x5:
1113                 /* vobu is end of ilvu */
1114                 if( p_dvd->dsi_pack.sml_agli.data[p_dvd->i_angle-1].address )
1115                 {
1116                     p_dvd->i_next_vobu = p_dvd->i_cur_block +
1117                         p_dvd->dsi_pack.sml_agli.data[p_dvd->i_angle-1].address;
1118                     p_dvd->i_pack_len = p_dvd->dsi_pack.sml_pbi.ilvu_ea;
1119
1120                     break;
1121                 }
1122             case 0x6:
1123                 /* vobu is beginning of ilvu */
1124             case 0x9:
1125                 /* next scr is 0 */
1126             case 0xa:
1127                 /* entering interleaved section */
1128             case 0x8:
1129                 /* non interleaved cells in interleaved section */
1130             default:
1131                 p_dvd->i_next_vobu = p_dvd->i_cur_block +
1132                     ( p_dvd->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1133                 p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1134                 break;
1135         }
1136 #else
1137         p_dvd->i_next_vobu = p_dvd->i_cur_block +
1138             ( p_dvd->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1139         p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1140 #endif
1141     }
1142     else
1143     {
1144         p_dvd->i_cur_cell = p_dvd->i_next_cell;
1145         DvdReadFindCell( p_dvd );
1146
1147         p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1148         p_dvd->i_next_vobu =
1149             p_dvd->p_cur_pgc->cell_playback[p_dvd->i_cur_cell].first_sector;
1150     }
1151
1152 #if 0
1153     msg_Dbg( p_input, 12, "scr %d lbn 0x%02x vobu_ea %d vob_id %d c_id %d",
1154              p_dvd->dsi_pack.dsi_gi.nv_pck_scr,
1155              p_dvd->dsi_pack.dsi_gi.nv_pck_lbn,
1156              p_dvd->dsi_pack.dsi_gi.vobu_ea,
1157              p_dvd->dsi_pack.dsi_gi.vobu_vob_idn,
1158              p_dvd->dsi_pack.dsi_gi.vobu_c_idn );
1159
1160     msg_Dbg( p_input, 12, "cat 0x%02x ilvu_ea %d ilvu_sa %d size %d",
1161              p_dvd->dsi_pack.sml_pbi.category,
1162              p_dvd->dsi_pack.sml_pbi.ilvu_ea,
1163              p_dvd->dsi_pack.sml_pbi.ilvu_sa,
1164              p_dvd->dsi_pack.sml_pbi.size );
1165
1166     msg_Dbg( p_input, 12, "next_vobu %d next_ilvu1 %d next_ilvu2 %d",
1167              p_dvd->dsi_pack.vobu_sri.next_vobu & 0x7fffffff,
1168              p_dvd->dsi_pack.sml_agli.data[ p_dvd->i_angle - 1 ].address,
1169              p_dvd->dsi_pack.sml_agli.data[ p_dvd->i_angle ].address);
1170 #endif
1171 }
1172
1173 /*****************************************************************************
1174  * DvdReadFindCell
1175  *****************************************************************************/
1176 static void DvdReadFindCell( thread_dvd_data_t * p_dvd )
1177 {
1178     int         pgc_id, pgn;
1179     int         i = 0;
1180     pgc_t *     p_pgc;
1181 #define cell p_dvd->p_cur_pgc->cell_playback
1182     if( cell[p_dvd->i_cur_cell].block_type == BLOCK_TYPE_ANGLE_BLOCK )
1183     {
1184 #if 0
1185         p_dvd->i_next_cell = p_dvd->i_cur_cell + p_dvd->i_angle_nb;
1186         p_dvd->i_cur_cell += p_dvd->i_angle - 1;
1187 #else
1188         p_dvd->i_cur_cell += p_dvd->i_angle - 1;
1189
1190         while( cell[p_dvd->i_cur_cell+i].block_mode != BLOCK_MODE_LAST_CELL )
1191         {
1192             i++;
1193         }
1194         p_dvd->i_next_cell = p_dvd->i_cur_cell + i + 1;
1195 #endif
1196     }
1197     else
1198     {
1199         p_dvd->i_next_cell = p_dvd->i_cur_cell + 1;
1200     }
1201 #undef cell
1202     pgc_id = p_dvd->p_vts_file->vts_ptt_srpt->title[
1203                 p_dvd->i_ttn-1].ptt[p_dvd->i_chapter-1].pgcn;
1204     pgn = p_dvd->p_vts_file->vts_ptt_srpt->title[
1205                 p_dvd->i_ttn-1].ptt[p_dvd->i_chapter-1].pgn;
1206     p_pgc = p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc;
1207
1208     if( p_pgc->program_map[pgn-1] <= p_dvd->i_cur_cell )
1209     {
1210         p_dvd->i_chapter++;
1211         p_dvd->b_eoc = VLC_TRUE;
1212     }
1213 }
1214
1215 /*****************************************************************************
1216  * DvdReadLaunchDecoders
1217  *****************************************************************************/
1218 static void DvdReadLauchDecoders( input_thread_t * p_input )
1219 {
1220     thread_dvd_data_t * p_dvd = (thread_dvd_data_t*)(p_input->p_access_data);
1221     int i_audio, i_spu;
1222
1223     input_SelectES( p_input, p_input->stream.pp_es[0] );
1224
1225     /* For audio: first one if none or a not existing one specified */
1226     i_audio = config_GetInt( p_input, "audio-channel" );
1227     if( i_audio < 0 /*|| i_audio > i_audio_nb*/ )
1228     {
1229         config_PutInt( p_input, "audio-channel", 1 );
1230         i_audio = 1;
1231     }
1232     if( i_audio > 0/* && i_audio_nb > 0*/ )
1233     {
1234         if( config_GetInt( p_input, "audio-type" ) == REQUESTED_A52 )
1235         {
1236             int     i_a52 = i_audio;
1237             while( ( p_input->stream.pp_es[i_a52]->i_fourcc !=
1238                    VLC_FOURCC('a','5','2','b') ) && ( i_a52 <=
1239                    p_dvd->p_vts_file->vtsi_mat->nr_of_vts_audio_streams ) )
1240             {
1241                 i_a52++;
1242             }
1243             if( p_input->stream.pp_es[i_a52]->i_fourcc
1244                  == VLC_FOURCC('a','5','2','b') )
1245             {
1246                 input_SelectES( p_input, p_input->stream.pp_es[i_a52] );
1247             }
1248         }
1249         else
1250         {
1251             input_SelectES( p_input, p_input->stream.pp_es[i_audio] );
1252         }
1253     }
1254
1255     /* for spu, default is none */
1256     i_spu = config_GetInt( p_input, "spu-channel" );
1257     if( i_spu < 0 /*|| i_spu > i_spu_nb*/ )
1258     {
1259         config_PutInt( p_input, "spu-channel", 0 );
1260         i_spu = 0;
1261     }
1262     if( i_spu > 0 /*&& i_spu_nb > 0*/ )
1263     {
1264         i_spu += p_dvd->p_vts_file->vtsi_mat->nr_of_vts_audio_streams;
1265         input_SelectES( p_input, p_input->stream.pp_es[i_spu] );
1266     }
1267 }