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 VideoLAN
   9  * $Id: input.c,v 1.9 2002/11/13 20:23:21 fenrir 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 int  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, u8 * 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 -1;
 115     }
 116
 117     p_demux = p_input->p_demux_data = malloc( sizeof(demux_sys_t ) );
 118     if( p_demux == NULL )
 119     {
 120         return -1;
 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 -1;
 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 0;
 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             size_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     int                     i_title = 1;
 247     int                     i_chapter = 1;
 248     int                     i_angle = 1;
 249     int                     i;
 250
 251     psz_parser = psz_source = strdup( p_input->psz_name );
 252     if( !psz_source )
 253     {
 254         return( -1 );
 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     while( *psz_parser && *psz_parser != '@' )
 263     {
 264         psz_parser++;
 265     }
 266
 267     if( *psz_parser == '@' )
 268     {
 269         /* Found options */
 270         *psz_parser = '\0';
 271         ++psz_parser;
 272
 273         i_title = (int)strtol( psz_parser, &psz_next, 10 );
 274         if( *psz_next )
 275         {
 276             psz_parser = psz_next + 1;
 277             i_chapter = (int)strtol( psz_parser, &psz_next, 10 );
 278             if( *psz_next )
 279             {
 280                 i_angle = (int)strtol( psz_next + 1, NULL, 10 );
 281             }
 282         }
 283
 284         i_title = i_title ? i_title : 1;
 285         i_chapter = i_chapter ? i_chapter : 1;
 286         i_angle = i_angle ? i_angle : 1;
 287     }
 288
 289     if( !*psz_source )
 290     {
 291         free( psz_source );
 292         if( !p_input->psz_access )
 293         {
 294             return -1;
 295         }
 296         psz_source = config_GetPsz( p_input, "dvd" );
 297         if( !psz_source ) return -1;
 298     }
 299
 300     if( stat( psz_source, &stat_info ) == -1 )
 301     {
 302         msg_Err( p_input, "cannot stat() source `%s' (%s)",
 303                           psz_source, strerror(errno));
 304         free( psz_source );
 305         return( -1 );
 306     }
 307     if( !S_ISBLK(stat_info.st_mode) &&
 308         !S_ISCHR(stat_info.st_mode) &&
 309         !S_ISDIR(stat_info.st_mode) )
 310     {
 311         msg_Warn( p_input, "dvdread module discarded (not a valid source)" );
 312         free( psz_source );
 313         return -1;
 314     }
 315
 316     msg_Dbg( p_input, "dvdroot=%s title=%d chapter=%d angle=%d",
 317                       psz_source, i_title, i_chapter, i_angle );
 318
 319
 320     p_dvdread = DVDOpen( psz_source );
 321
 322     /* free allocated strings */
 323     free( psz_source );
 324
 325     if( ! p_dvdread )
 326     {
 327         msg_Err( p_input, "libdvdcss cannot open source" );
 328         return -1;
 329     }
 330
 331     /* set up input  */
 332     p_input->i_mtu = 0;
 333
 334     p_dvd = malloc( sizeof(thread_dvd_data_t) );
 335     if( p_dvd == NULL )
 336     {
 337         msg_Err( p_input, "out of memory" );
 338         return -1;
 339     }
 340
 341     p_dvd->p_dvdread = p_dvdread;
 342     p_dvd->p_title = NULL;
 343     p_dvd->p_vts_file = NULL;
 344
 345
 346     p_input->p_access_data = (void *)p_dvd;
 347
 348     /* Ifo allocation & initialisation */
 349     if( ! ( p_dvd->p_vmg_file = ifoOpen( p_dvd->p_dvdread, 0 ) ) )
 350     {
 351         msg_Err( p_input, "cannot open VMG info" );
 352         free( p_dvd );
 353         return -1;
 354     }
 355     msg_Dbg( p_input, "VMG opened" );
 356
 357     /* Set stream and area data */
 358     vlc_mutex_lock( &p_input->stream.stream_lock );
 359
 360     p_input->stream.i_method = INPUT_METHOD_DVD;
 361
 362     /* If we are here we can control the pace... */
 363     p_input->stream.b_pace_control = 1;
 364     p_input->stream.b_seekable = 1;
 365
 366     p_input->stream.p_selected_area->i_size = 0;
 367     p_input->stream.p_selected_area->i_tell = 0;
 368
 369     /* Initialize ES structures */
 370     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 371
 372     /* disc input method */
 373     p_input->stream.i_method = INPUT_METHOD_DVD;
 374
 375 #define tt_srpt p_dvd->p_vmg_file->tt_srpt
 376     msg_Dbg( p_input, "number of titles: %d", tt_srpt->nr_of_srpts );
 377
 378 #define area p_input->stream.pp_areas
 379     /* We start from 1 here since the default area 0
 380      * is reserved for video_ts.vob */
 381     for( i = 1 ; i <= tt_srpt->nr_of_srpts ; i++ )
 382     {
 383         input_AddArea( p_input );
 384
 385         /* Titles are Program Chains */
 386         area[i]->i_id = i;
 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         /* Number of chapters */
 395         area[i]->i_part_nb = tt_srpt->title[i-1].nr_of_ptts;
 396         area[i]->i_part = 1;
 397
 398         area[i]->i_plugin_data = tt_srpt->title[i-1].title_set_nr;
 399     }
 400 #undef area
 401
 402     p_dvd->i_title = i_title <= tt_srpt->nr_of_srpts ? i_title : 1;
 403 #undef tt_srpt
 404
 405     p_area = p_input->stream.pp_areas[p_dvd->i_title];
 406     p_dvd->i_chapter = i_chapter;
 407
 408     p_dvd->i_chapter = i_chapter < p_area->i_part_nb ? i_chapter : 1;
 409     p_area->i_part = p_dvd->i_chapter;
 410
 411     p_dvd->i_angle = i_angle;
 412
 413     /* set title, chapter, audio and subpic */
 414     if( DvdReadSetArea( p_input, p_area ) )
 415     {
 416         vlc_mutex_unlock( &p_input->stream.stream_lock );
 417         return -1;
 418     }
 419
 420     vlc_mutex_unlock( &p_input->stream.stream_lock );
 421
 422     if( !p_input->psz_demux || !*p_input->psz_demux )
 423     {
 424         p_input->psz_demux = "dvdread";
 425     }
 426
 427     return 0;
 428 }
 429
 430 /*****************************************************************************
 431  * CloseDVD: close libdvdread
 432  *****************************************************************************/
 433 void E_(CloseDVD) ( vlc_object_t *p_this )
 434 {
 435     input_thread_t *    p_input = (input_thread_t *)p_this;
 436     thread_dvd_data_t * p_dvd = (thread_dvd_data_t *)p_input->p_access_data;
 437
 438     /* close libdvdread */
 439     DVDCloseFile( p_dvd->p_title );
 440     ifoClose( p_dvd->p_vts_file );
 441     ifoClose( p_dvd->p_vmg_file );
 442
 443     DVDClose( p_dvd->p_dvdread );
 444     free( p_dvd );
 445     p_input->p_access_data = NULL;
 446
 447 }
 448
 449 /*****************************************************************************
 450  * DvdReadSetProgram: Does nothing, a DVD is mono-program
 451  *****************************************************************************/
 452 static int DvdReadSetProgram( input_thread_t * p_input,
 453                               pgrm_descriptor_t * p_program )
 454 {
 455     if( p_input->stream.p_selected_program != p_program )
 456     {
 457         thread_dvd_data_t *  p_dvd;
 458
 459         p_dvd = (thread_dvd_data_t*)(p_input->p_access_data);
 460         p_dvd->i_angle = p_program->i_number;
 461
 462         memcpy( p_program, p_input->stream.p_selected_program,
 463                 sizeof(pgrm_descriptor_t) );
 464         p_program->i_number = p_dvd->i_angle;
 465         p_input->stream.p_selected_program = p_program;
 466
 467         msg_Dbg( p_input, "angle %d selected", p_dvd->i_angle );
 468     }
 469
 470     return 0;
 471 }
 472
 473 #define p_pgc         p_dvd->p_cur_pgc
 474
 475 /*****************************************************************************
 476  * DvdReadSetArea: initialize input data for title x, chapter y.
 477  * It should be called for each user navigation request.
 478  *****************************************************************************
 479  * Take care that i_title starts from 0 (vmg) and i_chapter start from 1.
 480  * Note that you have to take the lock before entering here.
 481  *****************************************************************************/
 482 static int DvdReadSetArea( input_thread_t * p_input, input_area_t * p_area )
 483 {
 484     thread_dvd_data_t *  p_dvd;
 485     int                  pgc_id = 0;
 486     int                  pgn = 0;
 487
 488     p_dvd = (thread_dvd_data_t*)p_input->p_access_data;
 489
 490     /* we can't use the interface slider until initilization is complete */
 491     p_input->stream.b_seekable = 0;
 492
 493     if( p_area != p_input->stream.p_selected_area )
 494     {
 495         es_descriptor_t *    p_es;
 496         int                  i_cell = 0;
 497         int                  i_audio_nb = 0;
 498         int                  i_spu_nb = 0;
 499         int                  i;
 500
 501 #define p_vmg         p_dvd->p_vmg_file
 502 #define p_vts         p_dvd->p_vts_file
 503         if( p_dvd->p_title != NULL )
 504         {
 505             DVDCloseFile( p_dvd->p_title );
 506         }
 507
 508         if( p_vts != NULL )
 509         {
 510             ifoClose( p_vts );
 511         }
 512
 513         /* Reset the Chapter position of the old title */
 514         p_input->stream.p_selected_area->i_part = 1;
 515
 516         /*
 517          *  We have to load all title information
 518          */
 519         /* Change the default area */
 520         p_input->stream.p_selected_area = p_area;
 521
 522         msg_Dbg( p_input, "open VTS %d, for title %d",
 523             p_vmg->tt_srpt->title[ p_area->i_id - 1 ].title_set_nr,
 524             p_area->i_id );
 525
 526         /* ifo vts */
 527         if( ! ( p_vts = ifoOpen( p_dvd->p_dvdread,
 528                 p_vmg->tt_srpt->title[ p_area->i_id - 1 ].title_set_nr ) ) )
 529         {
 530             msg_Err( p_input, "fatal error in vts ifo" );
 531             ifoClose( p_vmg );
 532             DVDClose( p_dvd->p_dvdread );
 533             return -1;
 534         }
 535
 536         /* title position inside the selected vts */
 537         p_dvd->i_ttn = p_vmg->tt_srpt->title[ p_area->i_id - 1 ].vts_ttn;
 538
 539         /*
 540          * Set selected title start
 541          */
 542         pgc_id = p_vts->vts_ptt_srpt->title[p_dvd->i_ttn-1].ptt[0].pgcn;
 543         pgn = p_vts->vts_ptt_srpt->title[p_dvd->i_ttn-1].ptt[0].pgn;
 544         p_pgc = p_vts->vts_pgcit->pgci_srp[ pgc_id - 1 ].pgc;
 545         i_cell = p_pgc->program_map[ pgn - 1 ] - 1;
 546
 547         p_area->i_start =
 548             LB2OFF( p_dvd->p_cur_pgc->cell_playback[ i_cell ].first_sector );
 549
 550         msg_Dbg( p_input, "start %d vts_title %d pgc %d pgn %d",
 551                   p_area->i_id, p_dvd->i_ttn, pgc_id, pgn );
 552
 553         /*
 554          * Find title end
 555          */
 556         i_cell = p_dvd->p_cur_pgc->nr_of_cells - 1;
 557
 558         p_dvd->i_end_block = p_pgc->cell_playback[ i_cell ].last_sector;
 559         p_area->i_size = LB2OFF( p_dvd->i_end_block )- p_area->i_start;
 560
 561         msg_Dbg( p_input, "start "I64Fd" size "I64Fd" end %d",
 562                   p_area->i_start , p_area->i_size, p_dvd->i_end_block );
 563
 564         /*
 565          * Set properties for current chapter
 566          */
 567         /* Remeber current chapter */
 568         p_dvd->i_chapter = p_area->i_part;
 569         p_dvd->b_eoc = 0;
 570
 571         pgc_id = p_vts->vts_ptt_srpt->title[
 572                     p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgcn;
 573         pgn = p_vts->vts_ptt_srpt->title[
 574                     p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgn;
 575
 576         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id-1].pgc;
 577         p_dvd->i_pack_len = 0;
 578         p_dvd->i_next_cell = p_dvd->i_cur_cell = p_pgc->program_map[pgn-1] - 1;
 579         DvdReadFindCell( p_dvd );
 580
 581         p_dvd->i_next_vobu = p_dvd->i_cur_block =
 582             p_pgc->cell_playback[p_dvd->i_cur_cell].first_sector;
 583
 584         /*
 585          * Angle management
 586          */
 587         p_dvd->i_angle_nb = p_vmg->tt_srpt->title[p_area->i_id-1].nr_of_angles;
 588
 589         if( p_dvd->i_angle > p_dvd->i_angle_nb )
 590         {
 591             p_dvd->i_angle = 1;
 592         }
 593
 594         /*
 595          * We've got enough info, time to open the title set data.
 596          */
 597         if( ! ( p_dvd->p_title = DVDOpenFile( p_dvd->p_dvdread,
 598             p_vmg->tt_srpt->title[ p_area->i_id - 1 ].title_set_nr,
 599             DVD_READ_TITLE_VOBS ) ) )
 600         {
 601             msg_Err( p_input, "cannot open title (VTS_%02d_1.VOB)",
 602                      p_vmg->tt_srpt->title[p_area->i_id-1].title_set_nr );
 603             ifoClose( p_vts );
 604             ifoClose( p_vmg );
 605             DVDClose( p_dvd->p_dvdread );
 606             return -1;
 607         }
 608
 609 //        IfoPrintTitle( p_dvd );
 610
 611         /*
 612          * Destroy obsolete ES by reinitializing program 0
 613          * and find all ES in title with ifo data
 614          */
 615         if( p_input->stream.pp_programs != NULL )
 616         {
 617             /* We don't use input_EndStream here since
 618              * we keep area structures */
 619
 620             while( p_input->stream.i_es_number )
 621             {
 622                 input_DelES( p_input, p_input->stream.pp_es[0] );
 623             }
 624
 625             while( p_input->stream.i_pgrm_number )
 626             {
 627                 input_DelProgram( p_input, p_input->stream.pp_programs[0] );
 628             }
 629
 630             if( p_input->stream.pp_selected_es )
 631             {
 632                 free( p_input->stream.pp_selected_es );
 633                 p_input->stream.pp_selected_es = NULL;
 634             }
 635             p_input->stream.i_selected_es_number = 0;
 636         }
 637
 638         input_AddProgram( p_input, 1, sizeof( stream_ps_data_t ) );
 639         p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 640
 641         for( i = 1 ; i < p_dvd->i_angle_nb ; i++ )
 642         {
 643             input_AddProgram( p_input, i+1, 0 );
 644         }
 645
 646         DvdReadSetProgram( p_input,
 647                            p_input->stream.pp_programs[p_dvd->i_angle-1] );
 648
 649         /* No PSM to read in DVD mode, we already have all information */
 650         p_input->stream.p_selected_program->b_is_ok = 1;
 651
 652         p_es = NULL;
 653
 654         /* ES 0 -> video MPEG2 */
 655 //        IfoPrintVideo( p_dvd );
 656
 657         p_es = input_AddES( p_input, NULL, 0xe0, 0 );
 658         p_es->i_stream_id = 0xe0;
 659         p_es->i_fourcc = VLC_FOURCC('m','p','g','v');
 660         p_es->i_cat = VIDEO_ES;
 661
 662 #define audio_control \
 663     p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->audio_control[i-1]
 664         /* Audio ES, in the order they appear in .ifo */
 665         for( i = 1 ; i <= p_vts->vtsi_mat->nr_of_vts_audio_streams ; i++ )
 666         {
 667             int i_position = 0;
 668             u16 i_id;
 669
 670 //            IfoPrintAudio( p_dvd, i );
 671
 672             /* audio channel is active if first byte is 0x80 */
 673             if( audio_control & 0x8000 )
 674             {
 675                 i_audio_nb++;
 676                 i_position = ( audio_control & 0x7F00 ) >> 8;
 677
 678             msg_Dbg( p_input, "audio position  %d", i_position );
 679                 switch( p_vts->vtsi_mat->vts_audio_attr[i-1].audio_format )
 680                 {
 681                 case 0x00:              /* A52 */
 682                     i_id = ( ( 0x80 + i_position ) << 8 ) | 0xbd;
 683                     p_es = input_AddES( p_input, NULL, i_id, 0 );
 684                     p_es->i_stream_id = 0xbd;
 685                     p_es->i_fourcc = VLC_FOURCC('a','5','2','b');
 686                     p_es->i_cat = AUDIO_ES;
 687                     strcpy( p_es->psz_desc, DecodeLanguage(
 688                         p_vts->vtsi_mat->vts_audio_attr[i-1].lang_code ) );
 689                     strcat( p_es->psz_desc, " (A52)" );
 690
 691                     break;
 692                 case 0x02:
 693                 case 0x03:              /* MPEG audio */
 694                     i_id = 0xc0 + i_position;
 695                     p_es = input_AddES( p_input, NULL, i_id, 0 );
 696                     p_es->i_stream_id = i_id;
 697                     p_es->i_fourcc = VLC_FOURCC('m','p','g','a');
 698                     p_es->i_cat = AUDIO_ES;
 699                     strcpy( p_es->psz_desc, DecodeLanguage(
 700                         p_vts->vtsi_mat->vts_audio_attr[i-1].lang_code ) );
 701                     strcat( p_es->psz_desc, " (mpeg)" );
 702
 703                     break;
 704                 case 0x04:              /* LPCM */
 705
 706                     i_id = ( ( 0xa0 + i_position ) << 8 ) | 0xbd;
 707                     p_es = input_AddES( p_input, NULL, i_id, 0 );
 708                     p_es->i_stream_id = i_id;
 709                     p_es->i_fourcc = VLC_FOURCC('l','p','c','b');
 710                     p_es->i_cat = AUDIO_ES;
 711                     strcpy( p_es->psz_desc, DecodeLanguage(
 712                         p_vts->vtsi_mat->vts_audio_attr[i-1].lang_code ) );
 713                     strcat( p_es->psz_desc, " (lpcm)" );
 714
 715                     break;
 716                 case 0x06:              /* DTS */
 717                     i_id = ( ( 0x88 + i_position ) << 8 ) | 0xbd;
 718                     msg_Err( p_input, "DTS audio not handled yet"
 719                                       "(0x%x)", i_id );
 720                     break;
 721                 default:
 722                     i_id = 0;
 723                     msg_Err( p_input, "unknown audio type %.2x",
 724                           p_vts->vtsi_mat->vts_audio_attr[i-1].audio_format );
 725                 }
 726             }
 727         }
 728 #undef audio_control
 729 #define spu_control \
 730     p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->subp_control[i-1]
 731
 732         /* Sub Picture ES */
 733
 734         for( i = 1 ; i <= p_vts->vtsi_mat->nr_of_vts_subp_streams; i++ )
 735         {
 736             int i_position = 0;
 737             u16 i_id;
 738
 739 //            IfoPrintSpu( p_dvd, i );
 740             msg_Dbg( p_input, "spu %d 0x%02x", i, spu_control );
 741
 742             if( spu_control & 0x80000000 )
 743             {
 744                 i_spu_nb++;
 745
 746                 /*  there are several streams for one spu */
 747                 if(  p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
 748                 {
 749                     /* 16:9 */
 750                     switch( p_vts->vtsi_mat->vts_video_attr.permitted_df )
 751                     {
 752                     case 1:
 753                         i_position = spu_control & 0xff;
 754                         break;
 755                     case 2:
 756                         i_position = ( spu_control >> 8 ) & 0xff;
 757                         break;
 758                     default:
 759                         i_position = ( spu_control >> 16 ) & 0xff;
 760                         break;
 761                     }
 762                 }
 763                 else
 764                 {
 765                     /* 4:3 */
 766                     i_position = ( spu_control >> 24 ) & 0x7F;
 767                 }
 768
 769                 i_id = ( ( 0x20 + i_position ) << 8 ) | 0xbd;
 770                 p_es = input_AddES( p_input, NULL, i_id, 0 );
 771                 p_es->i_stream_id = 0xbd;
 772                 p_es->i_fourcc = VLC_FOURCC('s','p','u','b');
 773                 p_es->i_cat = SPU_ES;
 774                 strcpy( p_es->psz_desc, DecodeLanguage(
 775                     p_vts->vtsi_mat->vts_subp_attr[i-1].lang_code ) );
 776             }
 777         }
 778 #undef spu_control
 779
 780         /* FIXME: hack to check that the demuxer is ready, and set
 781          * the decoders */
 782         if( p_input->p_demux )
 783         {
 784             DvdReadLauchDecoders( p_input );
 785         }
 786
 787     } /* i_title >= 0 */
 788     else
 789     {
 790         p_area = p_input->stream.p_selected_area;
 791     }
 792
 793     /*
 794      * Chapter selection
 795      */
 796
 797     if( p_area->i_part != p_dvd->i_chapter )
 798     {
 799         if( ( p_area->i_part > 0 ) &&
 800             ( p_area->i_part <= p_area->i_part_nb ))
 801         {
 802             p_dvd->i_ttn = p_vmg->tt_srpt->title[p_area->i_id-1].vts_ttn;
 803             pgc_id = p_vts->vts_ptt_srpt->title[
 804                         p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgcn;
 805             pgn = p_vts->vts_ptt_srpt->title[
 806                         p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgn;
 807
 808             p_pgc = p_vts->vts_pgcit->pgci_srp[ pgc_id - 1 ].pgc;
 809
 810             p_dvd->i_cur_cell = p_pgc->program_map[ pgn - 1 ] - 1;
 811             p_dvd->i_chapter = p_area->i_part;
 812             DvdReadFindCell( p_dvd );
 813
 814             p_dvd->i_pack_len = 0;
 815             p_dvd->i_next_vobu = p_dvd->i_cur_block =
 816                     p_pgc->cell_playback[p_dvd->i_cur_cell].first_sector;
 817         }
 818         else
 819         {
 820             p_area->i_part = p_dvd->i_chapter;
 821         }
 822     }
 823 #undef p_vts
 824 #undef p_vmg
 825
 826     /* warn interface that something has changed */
 827     p_area->i_tell = LB2OFF( p_dvd->i_next_vobu ) - p_area->i_start;
 828     p_input->stream.b_seekable = 1;
 829     p_input->stream.b_changed = 1;
 830
 831     return 0;
 832 }
 833
 834
 835 /*****************************************************************************
 836  * DvdReadRead: reads data packets into the netlist.
 837  *****************************************************************************
 838  * Returns -1 in case of error, 0 if everything went well, and 1 in case of
 839  * EOF.
 840  *****************************************************************************/
 841 static int DvdReadRead( input_thread_t * p_input,
 842                         byte_t * p_buffer, size_t i_count )
 843 {
 844     thread_dvd_data_t *     p_dvd;
 845     byte_t *                p_buf;
 846     int                     i_blocks_once;
 847     int                     i_blocks;
 848     int                     i_read;
 849     int                     i_read_total;
 850     vlc_bool_t              b_eot = 0;
 851
 852     p_dvd = (thread_dvd_data_t *)p_input->p_access_data;
 853     p_buf = p_buffer;
 854
 855     /*
 856      * Playback by cell in this pgc, starting at the cell for our chapter.
 857      */
 858     i_blocks = OFF2LB( i_count );
 859     i_read_total = 0;
 860     i_read = 0;
 861
 862     while( i_blocks )
 863     {
 864         /*
 865          * End of pack, we select the following one
 866          */
 867         if( ! p_dvd->i_pack_len )
 868         {
 869             /*
 870              * Read NAV packet.
 871              */
 872             if( ( i_read = DVDReadBlocks( p_dvd->p_title, p_dvd->i_next_vobu,
 873                            1, p_buf ) ) != 1 )
 874             {
 875                 msg_Err( p_input, "read failed for block %d",
 876                                   p_dvd->i_next_vobu );
 877                 return -1;
 878             }
 879
 880             /* basic check to be sure we don't have a empty title
 881              * go to next title if so */
 882             //assert( p_buffer[41] == 0xbf && p_buffer[1027] == 0xbf );
 883
 884             /*
 885              * Parse the contained dsi packet.
 886              */
 887
 888             DvdReadHandleDSI( p_dvd, p_buf );
 889
 890             /* End of File */
 891             if( p_dvd->i_next_vobu >= p_dvd->i_end_block + 1 )
 892             {
 893                 return 1;
 894             }
 895
 896             assert( p_dvd->i_pack_len < 1024 );
 897             /* FIXME: Ugly kludge: we send the pack block to the input for it
 898              * sometimes has a zero scr and restart the sync */
 899             p_dvd->i_cur_block ++;
 900             //p_dvd->i_pack_len++;
 901
 902             i_read_total++;
 903             p_buf += DVD_VIDEO_LB_LEN;
 904             i_blocks--;
 905         }
 906
 907         /*
 908          * Compute the number of blocks to read
 909          */
 910         i_blocks_once = p_dvd->i_pack_len >= i_blocks
 911                  ? i_blocks : p_dvd->i_pack_len;
 912         p_dvd->i_pack_len -= i_blocks_once;
 913
 914         /* Reads from DVD */
 915         i_read = DVDReadBlocks( p_dvd->p_title, p_dvd->i_cur_block,
 916                                 i_blocks_once, p_buf );
 917         if( i_read != i_blocks_once )
 918         {
 919             msg_Err( p_input, "read failed for %d/%d blocks at 0x%02x",
 920                               i_read, i_blocks_once, p_dvd->i_cur_block );
 921             return -1;
 922         }
 923
 924         i_blocks -= i_read;
 925         i_read_total += i_read;
 926         p_dvd->i_cur_block += i_read;
 927         p_buf += LB2OFF( i_read );
 928
 929     }
 930 /*
 931     msg_Dbg( p_input, "i_blocks: %d len: %d current: 0x%02x", i_read, p_dvd->i_pack_len, p_dvd->i_cur_block );
 932 */
 933
 934     vlc_mutex_lock( &p_input->stream.stream_lock );
 935
 936     if( p_dvd->b_eoc )
 937     {
 938         /* We modify i_part only at end of chapter not to erase
 939          * some modification from the interface */
 940         p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 941         p_dvd->b_eoc = 0;
 942     }
 943
 944     if( ( LB2OFF( p_dvd->i_cur_block )
 945           - p_input->stream.p_selected_area->i_start )
 946             >= p_input->stream.p_selected_area->i_size || b_eot )
 947     {
 948         if( ( p_input->stream.p_selected_area->i_id + 1 ) >=
 949                         p_input->stream.i_area_nb )
 950         {
 951             /* EOF */
 952             vlc_mutex_unlock( &p_input->stream.stream_lock );
 953             return 1;
 954         }
 955
 956         /* EOT */
 957         msg_Dbg( p_input, "new title" );
 958         DvdReadSetArea( p_input, p_input->stream.pp_areas[
 959                         p_input->stream.p_selected_area->i_id+1] );
 960         vlc_mutex_unlock( &p_input->stream.stream_lock );
 961         return 0;
 962     }
 963
 964     vlc_mutex_unlock( &p_input->stream.stream_lock );
 965
 966     return LB2OFF( i_read_total );
 967 }
 968 #undef p_pgc
 969
 970 /*****************************************************************************
 971  * DvdReadSeek : Goes to a given position on the stream.
 972  *****************************************************************************
 973  * This one is used by the input and translate chronological position from
 974  * input to logical position on the device.
 975  * The lock should be taken before calling this function.
 976  *****************************************************************************/
 977 static void DvdReadSeek( input_thread_t * p_input, off_t i_off )
 978 {
 979     thread_dvd_data_t *     p_dvd;
 980     int                     i_lb;
 981     int                     i_tmp;
 982     int                     i_chapter = 0;
 983     int                     i_cell = 0;
 984     int                     i_vobu = 0;
 985     int                     i_sub_cell = 0;
 986
 987     vlc_mutex_lock( &p_input->stream.stream_lock );
 988     i_off += p_input->stream.p_selected_area->i_start;
 989     vlc_mutex_unlock( &p_input->stream.stream_lock );
 990
 991     i_lb = OFF2LB( i_off );
 992     p_dvd = ( thread_dvd_data_t * )p_input->p_access_data;
 993
 994     /* find cell */
 995     while( p_dvd->p_cur_pgc->cell_playback[i_cell].last_sector < i_lb )
 996     {
 997         i_cell++;
 998     }
 999
1000     /* find chapter */
1001     do
1002     {
1003         pgc_t *     p_pgc;
1004         int         pgc_id, pgn;
1005
1006         i_chapter++;
1007         pgc_id = p_dvd->p_vts_file->vts_ptt_srpt->title[
1008                     p_dvd->i_ttn-1].ptt[i_chapter-1].pgcn;
1009         pgn = p_dvd->p_vts_file->vts_ptt_srpt->title[
1010                     p_dvd->i_ttn-1].ptt[i_chapter-1].pgn;
1011
1012         p_pgc = p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc;
1013         i_tmp = p_pgc->program_map[pgn-1];
1014
1015     } while( i_tmp <= i_cell );
1016
1017     /* find vobu */
1018     while( p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu]
1019             <= i_lb )
1020     {
1021         i_vobu++;
1022     }
1023
1024     /* find sub_cell */
1025     while( p_dvd->p_vts_file->vts_c_adt->cell_adr_table[i_sub_cell].start_sector <
1026             p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu-1] )
1027     {
1028         i_sub_cell++;
1029     }
1030
1031 /*
1032     msg_Dbg( p_input, "cell %d i_sub_cell %d chapter %d vobu %d cell_sector %d vobu_sector %d sub_cell_sector %d",
1033             i_cell, i_sub_cell,i_chapter, i_vobu,
1034             p_dvd->p_cur_pgc->cell_playback[i_cell].first_sector,
1035             p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu],
1036             p_dvd->p_vts_file->vts_c_adt->cell_adr_table[i_sub_cell-1].start_sector);
1037 */
1038     p_dvd->i_cur_block = i_lb;
1039     p_dvd->i_next_vobu =
1040         p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu];
1041     p_dvd->i_pack_len = p_dvd->i_next_vobu - i_lb;
1042     p_dvd->i_cur_cell = i_cell;
1043     p_dvd->i_chapter = i_chapter;
1044     DvdReadFindCell( p_dvd );
1045
1046     vlc_mutex_lock( &p_input->stream.stream_lock );
1047     p_input->stream.p_selected_area->i_tell =
1048         LB2OFF ( p_dvd->i_cur_block )
1049          - p_input->stream.p_selected_area->i_start;
1050     p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
1051     vlc_mutex_unlock( &p_input->stream.stream_lock );
1052
1053     return;
1054 }
1055
1056 /*****************************************************************************
1057  * DvdReadHandleDSI
1058  *****************************************************************************/
1059 static void DvdReadHandleDSI( thread_dvd_data_t * p_dvd, u8 * p_data )
1060 {
1061     navRead_DSI( &(p_dvd->dsi_pack), &(p_data[ DSI_START_BYTE ]) );
1062
1063     /*
1064      * Determine where we go next.  These values are the ones we mostly
1065      * care about.
1066      */
1067     p_dvd->i_cur_block = p_dvd->dsi_pack.dsi_gi.nv_pck_lbn;
1068
1069     /*
1070      * If we're not at the end of this cell, we can determine the next
1071      * VOBU to display using the VOBU_SRI information section of the
1072      * DSI.  Using this value correctly follows the current angle,
1073      * avoiding the doubled scenes in The Matrix, and makes our life
1074      * really happy.
1075      */
1076     if( p_dvd->dsi_pack.vobu_sri.next_vobu != SRI_END_OF_CELL )
1077     {
1078 #if 1
1079         switch( ( p_dvd->dsi_pack.sml_pbi.category & 0xf000 ) >> 12 )
1080         {
1081             case 0x4:
1082                 /* interleaved unit with no angle */
1083                 if( p_dvd->dsi_pack.sml_pbi.ilvu_sa != -1 )
1084                 {
1085                     p_dvd->i_next_vobu = p_dvd->i_cur_block +
1086                         p_dvd->dsi_pack.sml_pbi.ilvu_sa;
1087                     p_dvd->i_pack_len = p_dvd->dsi_pack.sml_pbi.ilvu_ea;
1088                 }
1089                 else
1090                 {
1091                     p_dvd->i_next_vobu = p_dvd->i_cur_block +
1092                         p_dvd->dsi_pack.dsi_gi.vobu_ea + 1;
1093                     p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1094                 }
1095                 break;
1096             case 0x5:
1097                 /* vobu is end of ilvu */
1098                 if( p_dvd->dsi_pack.sml_agli.data[p_dvd->i_angle-1].address )
1099                 {
1100                     p_dvd->i_next_vobu = p_dvd->i_cur_block +
1101                         p_dvd->dsi_pack.sml_agli.data[p_dvd->i_angle-1].address;
1102                     p_dvd->i_pack_len = p_dvd->dsi_pack.sml_pbi.ilvu_ea;
1103
1104                     break;
1105                 }
1106             case 0x6:
1107                 /* vobu is beginning of ilvu */
1108             case 0x9:
1109                 /* next scr is 0 */
1110             case 0xa:
1111                 /* entering interleaved section */
1112             case 0x8:
1113                 /* non interleaved cells in interleaved section */
1114             default:
1115                 p_dvd->i_next_vobu = p_dvd->i_cur_block +
1116                     ( p_dvd->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1117                 p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1118                 break;
1119         }
1120 #else
1121         p_dvd->i_next_vobu = p_dvd->i_cur_block +
1122             ( p_dvd->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1123         p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1124 #endif
1125     }
1126     else
1127     {
1128         p_dvd->i_cur_cell = p_dvd->i_next_cell;
1129         DvdReadFindCell( p_dvd );
1130
1131         p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1132         p_dvd->i_next_vobu =
1133             p_dvd->p_cur_pgc->cell_playback[p_dvd->i_cur_cell].first_sector;
1134     }
1135
1136 #if 0
1137     msg_Dbg( p_input, 12, "scr %d lbn 0x%02x vobu_ea %d vob_id %d c_id %d",
1138              p_dvd->dsi_pack.dsi_gi.nv_pck_scr,
1139              p_dvd->dsi_pack.dsi_gi.nv_pck_lbn,
1140              p_dvd->dsi_pack.dsi_gi.vobu_ea,
1141              p_dvd->dsi_pack.dsi_gi.vobu_vob_idn,
1142              p_dvd->dsi_pack.dsi_gi.vobu_c_idn );
1143
1144     msg_Dbg( p_input, 12, "cat 0x%02x ilvu_ea %d ilvu_sa %d size %d",
1145              p_dvd->dsi_pack.sml_pbi.category,
1146              p_dvd->dsi_pack.sml_pbi.ilvu_ea,
1147              p_dvd->dsi_pack.sml_pbi.ilvu_sa,
1148              p_dvd->dsi_pack.sml_pbi.size );
1149
1150     msg_Dbg( p_input, 12, "next_vobu %d next_ilvu1 %d next_ilvu2 %d",
1151              p_dvd->dsi_pack.vobu_sri.next_vobu & 0x7fffffff,
1152              p_dvd->dsi_pack.sml_agli.data[ p_dvd->i_angle - 1 ].address,
1153              p_dvd->dsi_pack.sml_agli.data[ p_dvd->i_angle ].address);
1154 #endif
1155 }
1156
1157 /*****************************************************************************
1158  * DvdReadFindCell
1159  *****************************************************************************/
1160 static void DvdReadFindCell( thread_dvd_data_t * p_dvd )
1161 {
1162     int         pgc_id, pgn;
1163     int         i = 0;
1164     pgc_t *     p_pgc;
1165 #define cell p_dvd->p_cur_pgc->cell_playback
1166     if( cell[p_dvd->i_cur_cell].block_type == BLOCK_TYPE_ANGLE_BLOCK )
1167     {
1168 #if 0
1169         p_dvd->i_next_cell = p_dvd->i_cur_cell + p_dvd->i_angle_nb;
1170         p_dvd->i_cur_cell += p_dvd->i_angle - 1;
1171 #else
1172         p_dvd->i_cur_cell += p_dvd->i_angle - 1;
1173
1174         while( cell[p_dvd->i_cur_cell+i].block_mode != BLOCK_MODE_LAST_CELL )
1175         {
1176             i++;
1177         }
1178         p_dvd->i_next_cell = p_dvd->i_cur_cell + i + 1;
1179 #endif
1180     }
1181     else
1182     {
1183         p_dvd->i_next_cell = p_dvd->i_cur_cell + 1;
1184     }
1185 #undef cell
1186     pgc_id = p_dvd->p_vts_file->vts_ptt_srpt->title[
1187                 p_dvd->i_ttn-1].ptt[p_dvd->i_chapter-1].pgcn;
1188     pgn = p_dvd->p_vts_file->vts_ptt_srpt->title[
1189                 p_dvd->i_ttn-1].ptt[p_dvd->i_chapter-1].pgn;
1190     p_pgc = p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc;
1191
1192     if( p_pgc->program_map[pgn-1] <= p_dvd->i_cur_cell )
1193     {
1194         p_dvd->i_chapter++;
1195         p_dvd->b_eoc = 1;
1196     }
1197 }
1198
1199 /*****************************************************************************
1200  * DvdReadLaunchDecoders
1201  *****************************************************************************/
1202 static void DvdReadLauchDecoders( input_thread_t * p_input )
1203 {
1204     thread_dvd_data_t * p_dvd = (thread_dvd_data_t*)(p_input->p_access_data);
1205     int i_audio, i_spu;
1206
1207     input_SelectES( p_input, p_input->stream.pp_es[0] );
1208
1209     /* For audio: first one if none or a not existing one specified */
1210     i_audio = config_GetInt( p_input, "audio-channel" );
1211     if( i_audio < 0 /*|| i_audio > i_audio_nb*/ )
1212     {
1213         config_PutInt( p_input, "audio-channel", 1 );
1214         i_audio = 1;
1215     }
1216     if( i_audio > 0/* && i_audio_nb > 0*/ )
1217     {
1218         if( config_GetInt( p_input, "audio-type" ) == REQUESTED_A52 )
1219         {
1220             int     i_a52 = i_audio;
1221             while( ( p_input->stream.pp_es[i_a52]->i_fourcc !=
1222                    VLC_FOURCC('a','5','2','b') ) && ( i_a52 <=
1223                    p_dvd->p_vts_file->vtsi_mat->nr_of_vts_audio_streams ) )
1224             {
1225                 i_a52++;
1226             }
1227             if( p_input->stream.pp_es[i_a52]->i_fourcc
1228                  == VLC_FOURCC('a','5','2','b') )
1229             {
1230                 input_SelectES( p_input, p_input->stream.pp_es[i_a52] );
1231             }
1232         }
1233         else
1234         {
1235             input_SelectES( p_input, p_input->stream.pp_es[i_audio] );
1236         }
1237     }
1238
1239     /* for spu, default is none */
1240     i_spu = config_GetInt( p_input, "spu-channel" );
1241     if( i_spu < 0 /*|| i_spu > i_spu_nb*/ )
1242     {
1243         config_PutInt( p_input, "spu-channel", 0 );
1244         i_spu = 0;
1245     }
1246     if( i_spu > 0 /*&& i_spu_nb > 0*/ )
1247     {
1248         i_spu += p_dvd->p_vts_file->vtsi_mat->nr_of_vts_audio_streams;
1249         input_SelectES( p_input, p_input->stream.pp_es[i_spu] );
1250     }
1251 }