git.sesse.net Git - vlc/blob - plugins/dvdread/input_dvdread.c

   1 /*****************************************************************************
   2  * input_dvdread.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_dvdread.c,v 1.22 2002/03/01 01:12:28 stef 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 <videolan/vlc.h>
  38
  39 #ifdef HAVE_UNISTD_H
  40 #   include <unistd.h>
  41 #endif
  42
  43 #include <fcntl.h>
  44 #include <sys/types.h>
  45 #include <string.h>
  46 #include <errno.h>
  47 #include <assert.h>
  48
  49 #ifdef STRNCASECMP_IN_STRINGS_H
  50 #   include <strings.h>
  51 #endif
  52
  53 #if defined( WIN32 )
  54 #   include <io.h>                                                 /* read() */
  55 #else
  56 #   include <sys/uio.h>                                      /* struct iovec */
  57 #endif
  58
  59 #if defined( WIN32 )
  60 #   include "input_iovec.h"
  61 #endif
  62
  63 #include "stream_control.h"
  64 #include "input_ext-intf.h"
  65 #include "input_ext-dec.h"
  66 #include "input_ext-plugins.h"
  67
  68 #include "input_dvdread.h"
  69
  70 #include "iso_lang.h"
  71
  72 #include "debug.h"
  73
  74 /* how many blocks DVDRead will read in each loop */
  75 #define DVD_BLOCK_READ_ONCE 64
  76
  77 /*****************************************************************************
  78  * Local prototypes
  79  *****************************************************************************/
  80 /* called from outside */
  81 static int  DvdReadInit     ( struct input_thread_s * );
  82 static void DvdReadEnd      ( struct input_thread_s * );
  83 static int  DvdReadDemux    ( struct input_thread_s * );
  84 static int  DvdReadRewind   ( struct input_thread_s * );
  85
  86 static int  DvdReadOpen     ( struct input_thread_s * );
  87 static void DvdReadClose    ( struct input_thread_s * );
  88 static int  DvdReadSetArea  ( struct input_thread_s *, struct input_area_s * );
  89 static int  DvdReadSetProgram( struct input_thread_s *, pgrm_descriptor_t * );
  90 static int  DvdReadRead     ( struct input_thread_s *, byte_t *, size_t );
  91 static void DvdReadSeek     ( struct input_thread_s *, off_t );
  92
  93 /* called only from here */
  94 static void DvdReadHandleDSI( thread_dvd_data_t * p_dvd, u8 * p_data );
  95 static void DvdReadFindCell ( thread_dvd_data_t * p_dvd );
  96
  97 /*****************************************************************************
  98  * Functions exported as capabilities. They are declared as static so that
  99  * we don't pollute the namespace too much.
 100  *****************************************************************************/
 101 void _M( access_getfunctions )( function_list_t * p_function_list )
 102 {
 103 #define access p_function_list->functions.access
 104     access.pf_open             = DvdReadOpen;
 105     access.pf_close            = DvdReadClose;
 106     access.pf_read             = DvdReadRead;
 107     access.pf_set_area         = DvdReadSetArea;
 108     access.pf_set_program      = DvdReadSetProgram;
 109     access.pf_seek             = DvdReadSeek;
 110 #undef access
 111 }
 112
 113 void _M( demux_getfunctions )( function_list_t * p_function_list )
 114 {
 115 #define demux p_function_list->functions.demux
 116     demux.pf_init             = DvdReadInit;
 117     demux.pf_end              = DvdReadEnd;
 118     demux.pf_demux            = DvdReadDemux;
 119     demux.pf_rewind           = DvdReadRewind;
 120 #undef demux
 121 }
 122
 123 /*
 124  * Data demux functions
 125  */
 126
 127 /*****************************************************************************
 128  * DvdReadInit: initializes DVD structures
 129  *****************************************************************************/
 130 static int DvdReadInit( input_thread_t * p_input )
 131 {
 132     thread_dvd_data_t *  p_dvd;
 133
 134     if( strncmp( p_input->p_access_module->psz_name, "dvdread", 7 ) )
 135     {
 136         return -1;
 137     }
 138
 139     p_dvd = (thread_dvd_data_t*)(p_input->p_access_data);
 140
 141     if( p_main->b_video )
 142     {
 143         input_SelectES( p_input, p_input->stream.pp_es[0] );
 144     }
 145
 146     if( p_main->b_audio )
 147     {
 148         /* For audio: first one if none or a not existing one specified */
 149         int i_audio = config_GetIntVariable( INPUT_CHANNEL_VAR );
 150         if( i_audio < 0 /*|| i_audio > i_audio_nb*/ )
 151         {
 152             config_PutIntVariable( INPUT_CHANNEL_VAR, 1 );
 153             i_audio = 1;
 154         }
 155         if( i_audio > 0/* && i_audio_nb > 0*/ )
 156         {
 157             if( config_GetIntVariable( AOUT_SPDIF_VAR ) ||
 158                 ( config_GetIntVariable( INPUT_AUDIO_VAR ) ==
 159                   REQUESTED_AC3 ) )
 160             {
 161                 int     i_ac3 = i_audio;
 162                 while( ( p_input->stream.pp_es[i_ac3]->i_type !=
 163                        AC3_AUDIO_ES ) && ( i_ac3 <=
 164                        p_dvd->p_vts_file->vtsi_mat->nr_of_vts_audio_streams ) )
 165                 {
 166                     i_ac3++;
 167                 }
 168                 if( p_input->stream.pp_es[i_ac3]->i_type == AC3_AUDIO_ES )
 169                 {
 170                     input_SelectES( p_input,
 171                                     p_input->stream.pp_es[i_ac3] );
 172                 }
 173             }
 174             else
 175             {
 176                 input_SelectES( p_input,
 177                                 p_input->stream.pp_es[i_audio] );
 178             }
 179         }
 180     }
 181
 182     if( p_main->b_video )
 183     {
 184         /* for spu, default is none */
 185         int i_spu = config_GetIntVariable( INPUT_SUBTITLE_VAR );
 186         if( i_spu < 0 /*|| i_spu > i_spu_nb*/ )
 187         {
 188             config_PutIntVariable( INPUT_SUBTITLE_VAR, 0 );
 189             i_spu = 0;
 190         }
 191         if( i_spu > 0 /*&& i_spu_nb > 0*/ )
 192         {
 193             i_spu += p_dvd->p_vts_file->vtsi_mat->nr_of_vts_audio_streams;
 194             input_SelectES( p_input, p_input->stream.pp_es[i_spu] );
 195         }
 196     }
 197
 198     return 0;
 199 }
 200
 201 /*****************************************************************************
 202  * DvdReadEnd: frees unused data
 203  *****************************************************************************/
 204 static void DvdReadEnd( input_thread_t * p_input )
 205 {
 206 }
 207
 208 /*****************************************************************************
 209  * DvdReadDemux
 210  *****************************************************************************/
 211 #define PEEK( SIZE )                                                        \
 212     i_result = input_Peek( p_input, &p_peek, SIZE );                        \
 213     if( i_result == -1 )                                                    \
 214     {                                                                       \
 215         return( -1 );                                                       \
 216     }                                                                       \
 217     else if( i_result < SIZE )                                              \
 218     {                                                                       \
 219         /* EOF */                                                           \
 220         return( 0 );                                                        \
 221     }
 222
 223 static int DvdReadDemux( input_thread_t * p_input )
 224 {
 225     int                 i;
 226     byte_t *            p_peek;
 227     data_packet_t *     p_data;
 228     ssize_t             i_result;
 229     int                 i_packet_size;
 230
 231
 232     /* Read headers to compute payload length */
 233     for( i = 0 ; i < DVD_BLOCK_READ_ONCE ; i++ )
 234     {
 235
 236         /* Read what we believe to be a packet header. */
 237         PEEK( 4 );
 238
 239         /* Default header */
 240         if( U32_AT( p_peek ) != 0x1BA )
 241         {
 242             /* That's the case for all packets, except pack header. */
 243             i_packet_size = U16_AT( p_peek + 4 );
 244         }
 245         else
 246         {
 247             /* MPEG-2 Pack header. */
 248             i_packet_size = 8;
 249         }
 250
 251         /* Fetch a packet of the appropriate size. */
 252         i_result = input_SplitBuffer( p_input, &p_data, i_packet_size + 6 );
 253         if( i_result <= 0 )
 254         {
 255             return( i_result );
 256         }
 257
 258         /* In MPEG-2 pack headers we still have to read stuffing bytes. */
 259         if( (p_data->p_demux_start[3] == 0xBA) && (i_packet_size == 8) )
 260         {
 261             size_t i_stuffing = (p_data->p_demux_start[13] & 0x7);
 262             /* Force refill of the input buffer - though we don't care
 263              * about p_peek. Please note that this is unoptimized. */
 264             PEEK( i_stuffing );
 265             p_input->p_current_data += i_stuffing;
 266         }
 267
 268         input_DemuxPS( p_input, p_data );
 269
 270     }
 271
 272     return i;
 273 }
 274
 275 /*****************************************************************************
 276  * DVDRewind : reads a stream backward
 277  *****************************************************************************/
 278 static int DvdReadRewind( input_thread_t * p_input )
 279 {
 280     return( -1 );
 281 }
 282
 283 /*
 284  * Data access functions
 285  */
 286
 287 /*****************************************************************************
 288  * DvdReadOpen: open libdvdread
 289  *****************************************************************************/
 290 static int DvdReadOpen( struct input_thread_s *p_input )
 291 {
 292     struct stat             stat_info;
 293     thread_dvd_data_t *     p_dvd;
 294     dvd_reader_t *          p_dvdread;
 295     input_area_t *          p_area;
 296     int                     i_title;
 297     int                     i_chapter;
 298     int                     i;
 299
 300     if( stat( p_input->psz_name, &stat_info ) == -1 )
 301     {
 302         intf_ErrMsg( "input error: cannot stat() device `%s' (%s)",
 303                      p_input->psz_name, strerror(errno));
 304         return( -1 );
 305     }
 306     if( !S_ISBLK(stat_info.st_mode) &&
 307         !S_ISCHR(stat_info.st_mode) &&
 308         !S_ISDIR(stat_info.st_mode) )
 309     {
 310         intf_WarnMsg( 3, "input : DvdRead plugin discarded"
 311                          " (not a valid source)" );
 312         return -1;
 313     }
 314
 315     p_dvdread = DVDOpen( p_input->psz_name );
 316     if( ! p_dvdread )
 317     {
 318         intf_ErrMsg( "dvdread error: libdvdcss can't open source" );
 319         return -1;
 320     }
 321
 322     /* set up input  */
 323     p_input->i_mtu = 0;
 324
 325     p_dvd = malloc( sizeof(thread_dvd_data_t) );
 326     if( p_dvd == NULL )
 327     {
 328         intf_ErrMsg( "dvdread error: out of memory" );
 329         return -1;
 330     }
 331
 332     p_dvd->p_dvdread = p_dvdread;
 333     p_dvd->p_title = NULL;
 334     p_dvd->p_vts_file = NULL;
 335
 336     p_input->p_access_data = (void *)p_dvd;
 337
 338     /* Ifo allocation & initialisation */
 339     if( ! ( p_dvd->p_vmg_file = ifoOpen( p_dvd->p_dvdread, 0 ) ) )
 340     {
 341         intf_ErrMsg( "dvdread error: can't open VMG info" );
 342         free( p_dvd );
 343         return -1;
 344     }
 345     intf_WarnMsg( 2, "dvdread info: VMG opened" );
 346
 347     /* Set stream and area data */
 348     vlc_mutex_lock( &p_input->stream.stream_lock );
 349
 350     p_input->stream.i_method = INPUT_METHOD_DVD;
 351
 352     /* If we are here we can control the pace... */
 353     p_input->stream.b_pace_control = 1;
 354     p_input->stream.b_seekable = 1;
 355
 356     p_input->stream.p_selected_area->i_size = 0;
 357     p_input->stream.p_selected_area->i_tell = 0;
 358
 359     /* Initialize ES structures */
 360     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 361
 362     /* disc input method */
 363     p_input->stream.i_method = INPUT_METHOD_DVD;
 364
 365 #define tt_srpt p_dvd->p_vmg_file->tt_srpt
 366     intf_WarnMsg( 2, "dvdread info: number of titles: %d", tt_srpt->nr_of_srpts );
 367
 368 #define area p_input->stream.pp_areas
 369     /* We start from 1 here since the default area 0
 370      * is reserved for video_ts.vob */
 371     for( i = 1 ; i <= tt_srpt->nr_of_srpts ; i++ )
 372     {
 373         input_AddArea( p_input );
 374
 375         /* Titles are Program Chains */
 376         area[i]->i_id = i;
 377
 378         /* Absolute start offset and size
 379          * We can only set that with vts ifo, so we do it during the
 380          * first call to DVDSetArea */
 381         area[i]->i_start = 0;
 382         area[i]->i_size = 0;
 383
 384         /* Number of chapters */
 385         area[i]->i_part_nb = tt_srpt->title[i-1].nr_of_ptts;
 386         area[i]->i_part = 1;
 387
 388         /* Number of angles */
 389         area[i]->i_angle_nb = 0;
 390         area[i]->i_angle = 1;
 391
 392         area[i]->i_plugin_data = tt_srpt->title[i-1].title_set_nr;
 393     }
 394 #undef area
 395
 396     /* Get requested title - if none try the first title */
 397     i_title = config_GetIntVariable( INPUT_TITLE_VAR );
 398     if( i_title <= 0 || i_title > tt_srpt->nr_of_srpts )
 399     {
 400         i_title = 1;
 401     }
 402
 403 #undef tt_srpt
 404
 405     /* Get requested chapter - if none defaults to first one */
 406     i_chapter = config_GetIntVariable( INPUT_CHAPTER_VAR );
 407     if( i_chapter <= 0 )
 408     {
 409         i_chapter = 1;
 410     }
 411
 412     p_input->stream.pp_areas[i_title]->i_part = i_chapter;
 413
 414     p_area = p_input->stream.pp_areas[i_title];
 415
 416     /* set title, chapter, audio and subpic */
 417     if( DvdReadSetArea( p_input, p_area ) )
 418     {
 419         vlc_mutex_unlock( &p_input->stream.stream_lock );
 420         return -1;
 421     }
 422
 423     vlc_mutex_unlock( &p_input->stream.stream_lock );
 424
 425     return 0;
 426 }
 427
 428 /*****************************************************************************
 429  * DvdReadClose: close libdvdread
 430  *****************************************************************************/
 431 static void DvdReadClose( struct input_thread_s *p_input )
 432 {
 433     thread_dvd_data_t *     p_dvd;
 434
 435     p_dvd = (thread_dvd_data_t *)p_input->p_access_data;
 436
 437     /* close libdvdread */
 438     DVDCloseFile( p_dvd->p_title );
 439     ifoClose( p_dvd->p_vts_file );
 440     ifoClose( p_dvd->p_vmg_file );
 441
 442     DVDClose( p_dvd->p_dvdread );
 443     free( p_dvd );
 444     p_input->p_access_data = NULL;
 445
 446 }
 447
 448 /*****************************************************************************
 449  * DvdReadSetProgram: Does nothing, a DVD is mono-program
 450  *****************************************************************************/
 451 static int DvdReadSetProgram( input_thread_t * p_input,
 452                               pgrm_descriptor_t * p_program )
 453 {
 454     return 0;
 455 }
 456
 457 #define p_pgc         p_dvd->p_cur_pgc
 458
 459 /*****************************************************************************
 460  * DvdReadSetArea: initialize input data for title x, chapter y.
 461  * It should be called for each user navigation request.
 462  *****************************************************************************
 463  * Take care that i_title starts from 0 (vmg) and i_chapter start from 1.
 464  * Note that you have to take the lock before entering here.
 465  *****************************************************************************/
 466 static int DvdReadSetArea( input_thread_t * p_input, input_area_t * p_area )
 467 {
 468     thread_dvd_data_t *  p_dvd;
 469     int                  pgc_id = 0;
 470     int                  pgn = 0;
 471
 472     p_dvd = (thread_dvd_data_t*)p_input->p_access_data;
 473
 474     /* we can't use the interface slider until initilization is complete */
 475     p_input->stream.b_seekable = 0;
 476
 477     if( p_area != p_input->stream.p_selected_area )
 478     {
 479         es_descriptor_t *    p_es;
 480         int                  i_cell = 0;
 481         int                  i_audio_nb = 0;
 482         int                  i_spu_nb = 0;
 483         int                  i;
 484
 485 #define p_vmg         p_dvd->p_vmg_file
 486 #define p_vts         p_dvd->p_vts_file
 487         if( p_dvd->p_title != NULL )
 488         {
 489             DVDCloseFile( p_dvd->p_title );
 490         }
 491
 492         if( p_vts != NULL )
 493         {
 494             ifoClose( p_vts );
 495         }
 496
 497         /* Reset the Chapter position of the old title */
 498         p_input->stream.p_selected_area->i_part = 1;
 499
 500         /*
 501          *  We have to load all title information
 502          */
 503         /* Change the default area */
 504         p_input->stream.p_selected_area = p_area;
 505
 506         intf_WarnMsg( 12, "dvdread: open VTS %d, for title %d",
 507             p_vmg->tt_srpt->title[ p_area->i_id - 1 ].title_set_nr,
 508             p_area->i_id );
 509
 510         /* ifo vts */
 511         if( ! ( p_vts = ifoOpen( p_dvd->p_dvdread,
 512                 p_vmg->tt_srpt->title[ p_area->i_id - 1 ].title_set_nr ) ) )
 513         {
 514             intf_ErrMsg( "dvdread error: fatal error in vts ifo" );
 515             ifoClose( p_vmg );
 516             DVDClose( p_dvd->p_dvdread );
 517             return -1;
 518         }
 519
 520         /* title position inside the selected vts */
 521         p_dvd->i_ttn = p_vmg->tt_srpt->title[ p_area->i_id - 1 ].vts_ttn;
 522
 523         /*
 524          * Set selected title start
 525          */
 526         pgc_id = p_vts->vts_ptt_srpt->title[p_dvd->i_ttn-1].ptt[0].pgcn;
 527         pgn = p_vts->vts_ptt_srpt->title[p_dvd->i_ttn-1].ptt[0].pgn;
 528         p_pgc = p_vts->vts_pgcit->pgci_srp[ pgc_id - 1 ].pgc;
 529         i_cell = p_pgc->program_map[ pgn - 1 ] - 1;
 530
 531         p_area->i_start =
 532             LB2OFF( p_dvd->p_cur_pgc->cell_playback[ i_cell ].first_sector );
 533
 534         intf_WarnMsg( 3, "dvdread: start %d vts_title %d pgc %d pgn %d",
 535                          p_area->i_id, p_dvd->i_ttn, pgc_id, pgn );
 536
 537         /*
 538          * Find title end
 539          */
 540         i_cell = p_dvd->p_cur_pgc->nr_of_cells - 1;
 541
 542         p_dvd->i_end_block = p_pgc->cell_playback[ i_cell ].last_sector;
 543         p_area->i_size = LB2OFF( p_dvd->i_end_block )- p_area->i_start;
 544
 545         intf_WarnMsg( 12, "dvdread: start %lld size %lld end %d",
 546                           p_area->i_start , p_area->i_size, p_dvd->i_end_block );
 547
 548         /*
 549          * Set properties for current chapter
 550          */
 551         /* Remeber current chapter */
 552         p_dvd->i_chapter = p_area->i_part;
 553         p_dvd->b_eoc = 0;
 554
 555         pgc_id = p_vts->vts_ptt_srpt->title[
 556                     p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgcn;
 557         pgn = p_vts->vts_ptt_srpt->title[
 558                     p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgn;
 559
 560         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id-1].pgc;
 561         p_dvd->i_pack_len = 0;
 562         p_dvd->i_next_cell = p_dvd->i_cur_cell = p_pgc->program_map[pgn-1] - 1;
 563         DvdReadFindCell( p_dvd );
 564
 565         p_dvd->i_next_vobu = p_dvd->i_cur_block =
 566             p_pgc->cell_playback[p_dvd->i_cur_cell].first_sector;
 567
 568         /*
 569          * Angle management
 570          */
 571         p_area->i_angle_nb = p_vmg->tt_srpt->title[p_area->i_id-1].nr_of_angles;
 572         p_area->i_angle = config_GetIntVariable( INPUT_ANGLE_VAR );
 573
 574         if( ( p_area->i_angle <= 0 ) || p_area->i_angle > p_area->i_angle_nb )
 575         {
 576             p_area->i_angle = 1;
 577         }
 578         p_dvd->i_angle = p_area->i_angle;
 579         p_dvd->i_angle_nb = p_area->i_angle_nb;
 580
 581         /*
 582          * We've got enough info, time to open the title set data.
 583          */
 584         if( ! ( p_dvd->p_title = DVDOpenFile( p_dvd->p_dvdread,
 585             p_vmg->tt_srpt->title[ p_area->i_id - 1 ].title_set_nr,
 586             DVD_READ_TITLE_VOBS ) ) )
 587         {
 588             intf_ErrMsg( "dvdread error: can't open title (VTS_%02d_1.VOB)",
 589                          p_vmg->tt_srpt->title[p_area->i_id-1].title_set_nr );
 590             ifoClose( p_vts );
 591             ifoClose( p_vmg );
 592             DVDClose( p_dvd->p_dvdread );
 593             return -1;
 594         }
 595
 596 //        IfoPrintTitle( p_dvd );
 597
 598         /*
 599          * Destroy obsolete ES by reinitializing program 0
 600          * and find all ES in title with ifo data
 601          */
 602         if( p_input->stream.pp_programs != NULL )
 603         {
 604             /* We don't use input_EndStream here since
 605              * we keep area structures */
 606
 607             for( i = 0 ; i < p_input->stream.i_selected_es_number ; i++ )
 608             {
 609                 input_UnselectES( p_input, p_input->stream.pp_selected_es[i] );
 610             }
 611
 612             free( p_input->stream.pp_selected_es );
 613             input_DelProgram( p_input, p_input->stream.p_selected_program );
 614
 615             p_input->stream.pp_selected_es = NULL;
 616             p_input->stream.i_selected_es_number = 0;
 617         }
 618
 619         input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
 620         p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 621
 622         /* No PSM to read in DVD mode, we already have all information */
 623         p_input->stream.p_selected_program->b_is_ok = 1;
 624
 625         p_es = NULL;
 626
 627         /* ES 0 -> video MPEG2 */
 628 //        IfoPrintVideo( p_dvd );
 629
 630         p_es = input_AddES( p_input, p_input->stream.p_selected_program, 0xe0, 0 );
 631         p_es->i_stream_id = 0xe0;
 632         p_es->i_type = MPEG2_VIDEO_ES;
 633         p_es->i_cat = VIDEO_ES;
 634
 635 #define audio_control \
 636     p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->audio_control[i-1]
 637         /* Audio ES, in the order they appear in .ifo */
 638         for( i = 1 ; i <= p_vts->vtsi_mat->nr_of_vts_audio_streams ; i++ )
 639         {
 640             int i_position = 0;
 641             u16 i_id;
 642
 643 //            IfoPrintAudio( p_dvd, i );
 644
 645             /* audio channel is active if first byte is 0x80 */
 646             if( audio_control & 0x8000 )
 647             {
 648                 i_audio_nb++;
 649                 i_position = ( audio_control & 0x7F00 ) >> 8;
 650
 651             intf_WarnMsg( 12, "dvd audio position  %d", i_position );
 652                 switch( p_vts->vtsi_mat->vts_audio_attr[i-1].audio_format )
 653                 {
 654                 case 0x00:              /* AC3 */
 655                     i_id = ( ( 0x80 + i_position ) << 8 ) | 0xbd;
 656                     p_es = input_AddES( p_input,
 657                                p_input->stream.p_selected_program, i_id, 0 );
 658                     p_es->i_stream_id = 0xbd;
 659                     p_es->i_type = AC3_AUDIO_ES;
 660                     p_es->b_audio = 1;
 661                     p_es->i_cat = AUDIO_ES;
 662                     strcpy( p_es->psz_desc, DecodeLanguage( hton16(
 663                         p_vts->vtsi_mat->vts_audio_attr[i-1].lang_code ) ) );
 664                     strcat( p_es->psz_desc, " (ac3)" );
 665
 666                     break;
 667                 case 0x02:
 668                 case 0x03:              /* MPEG audio */
 669                     i_id = 0xc0 + i_position;
 670                     p_es = input_AddES( p_input,
 671                                     p_input->stream.p_selected_program, i_id, 0 );
 672                     p_es->i_stream_id = i_id;
 673                     p_es->i_type = MPEG2_AUDIO_ES;
 674                     p_es->b_audio = 1;
 675                     p_es->i_cat = AUDIO_ES;
 676                     strcpy( p_es->psz_desc, DecodeLanguage( hton16(
 677                         p_vts->vtsi_mat->vts_audio_attr[i-1].lang_code ) ) );
 678                     strcat( p_es->psz_desc, " (mpeg)" );
 679
 680                     break;
 681                 case 0x04:              /* LPCM */
 682
 683                     i_id = ( ( 0xa0 + i_position ) << 8 ) | 0xbd;
 684                     p_es = input_AddES( p_input,
 685                                     p_input->stream.p_selected_program, i_id, 0 );
 686                     p_es->i_stream_id = i_id;
 687                     p_es->i_type = LPCM_AUDIO_ES;
 688                     p_es->b_audio = 1;
 689                     p_es->i_cat = AUDIO_ES;
 690                     strcpy( p_es->psz_desc, DecodeLanguage( hton16(
 691                         p_vts->vtsi_mat->vts_audio_attr[i-1].lang_code ) ) );
 692                     strcat( p_es->psz_desc, " (lpcm)" );
 693
 694                     break;
 695                 case 0x06:              /* DTS */
 696                     i_id = ( ( 0x88 + i_position ) << 8 ) | 0xbd;
 697                     intf_ErrMsg( "dvd warning: DTS audio not handled yet"
 698                                  "(0x%x)", i_id );
 699                     break;
 700                 default:
 701                     i_id = 0;
 702                     intf_ErrMsg( "dvd warning: unknown audio type %.2x",
 703                              p_vts->vtsi_mat->vts_audio_attr[i-1].audio_format );
 704                 }
 705             }
 706         }
 707 #undef audio_control
 708 #define spu_control \
 709     p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->subp_control[i-1]
 710
 711         /* Sub Picture ES */
 712
 713         for( i = 1 ; i <= p_vts->vtsi_mat->nr_of_vts_subp_streams; i++ )
 714         {
 715             int i_position = 0;
 716             u16 i_id;
 717
 718 //            IfoPrintSpu( p_dvd, i );
 719             intf_WarnMsg( 12, "dvd spu %d 0x%02x", i, spu_control );
 720
 721             if( spu_control & 0x80000000 )
 722             {
 723                 i_spu_nb++;
 724
 725                 /*  there are several streams for one spu */
 726                 if(  p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
 727                 {
 728                     /* 16:9 */
 729                     switch( p_vts->vtsi_mat->vts_video_attr.permitted_df )
 730                     {
 731                     case 1:
 732                         i_position = spu_control & 0xff;
 733                         break;
 734                     case 2:
 735                         i_position = ( spu_control >> 8 ) & 0xff;
 736                         break;
 737                     default:
 738                         i_position = ( spu_control >> 16 ) & 0xff;
 739                         break;
 740                     }
 741                 }
 742                 else
 743                 {
 744                     /* 4:3 */
 745                     i_position = ( spu_control >> 24 ) & 0x7F;
 746                 }
 747
 748                 i_id = ( ( 0x20 + i_position ) << 8 ) | 0xbd;
 749                 p_es = input_AddES( p_input,
 750                                     p_input->stream.p_selected_program, i_id, 0 );
 751                 p_es->i_stream_id = 0xbd;
 752                 p_es->i_type = DVD_SPU_ES;
 753                 p_es->i_cat = SPU_ES;
 754                 strcpy( p_es->psz_desc, DecodeLanguage( hton16(
 755                     p_vts->vtsi_mat->vts_subp_attr[i-1].lang_code ) ) );
 756             }
 757         }
 758 #undef spu_control
 759
 760         /* FIXME: hack to check that the demuxer is ready, and set
 761          * the decoders */
 762         if( p_input->pf_init )
 763         {
 764             p_input->pf_init( p_input );
 765         }
 766
 767     } /* i_title >= 0 */
 768     else
 769     {
 770         p_area = p_input->stream.p_selected_area;
 771     }
 772
 773     /*
 774      * Chapter selection
 775      */
 776
 777     if( p_area->i_part != p_dvd->i_chapter )
 778     {
 779         if( ( p_area->i_part > 0 ) &&
 780             ( p_area->i_part <= p_area->i_part_nb ))
 781         {
 782             p_dvd->i_ttn = p_vmg->tt_srpt->title[p_area->i_id-1].vts_ttn;
 783             pgc_id = p_vts->vts_ptt_srpt->title[
 784                         p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgcn;
 785             pgn = p_vts->vts_ptt_srpt->title[
 786                         p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgn;
 787
 788             p_pgc = p_vts->vts_pgcit->pgci_srp[ pgc_id - 1 ].pgc;
 789
 790             p_dvd->i_cur_cell = p_pgc->program_map[ pgn - 1 ] - 1;
 791             p_dvd->i_chapter = p_area->i_part;
 792             DvdReadFindCell( p_dvd );
 793
 794             p_dvd->i_pack_len = 0;
 795             p_dvd->i_next_vobu = p_dvd->i_cur_block =
 796                     p_pgc->cell_playback[p_dvd->i_cur_cell].first_sector;
 797         }
 798         else
 799         {
 800             p_area->i_part = p_dvd->i_chapter;
 801         }
 802     }
 803 #undef p_vts
 804 #undef p_vmg
 805
 806     if( p_area->i_angle != p_dvd->i_angle )
 807     {
 808         p_dvd->i_angle = p_area->i_angle;
 809
 810         intf_WarnMsg( 3, "dvd info: angle %d selected", p_area->i_angle );
 811     }
 812     /* warn interface that something has changed */
 813     p_area->i_tell = LB2OFF( p_dvd->i_next_vobu ) - p_area->i_start;
 814     p_input->stream.b_seekable = 1;
 815     p_input->stream.b_changed = 1;
 816
 817     return 0;
 818 }
 819
 820
 821 /*****************************************************************************
 822  * DvdReadRead: reads data packets into the netlist.
 823  *****************************************************************************
 824  * Returns -1 in case of error, 0 if everything went well, and 1 in case of
 825  * EOF.
 826  *****************************************************************************/
 827 static int DvdReadRead( input_thread_t * p_input,
 828                         byte_t * p_buffer, size_t i_count )
 829 {
 830     thread_dvd_data_t *     p_dvd;
 831     byte_t *                p_buf;
 832     int                     i_blocks_once;
 833     int                     i_blocks;
 834     int                     i_read;
 835     int                     i_read_total;
 836     boolean_t               b_eot = 0;
 837
 838     p_dvd = (thread_dvd_data_t *)p_input->p_access_data;
 839     p_buf = p_buffer;
 840
 841     /*
 842      * Playback by cell in this pgc, starting at the cell for our chapter.
 843      */
 844     i_blocks = OFF2LB( i_count );
 845     i_read_total = 0;
 846     i_read = 0;
 847
 848     while( i_blocks )
 849     {
 850         /*
 851          * End of pack, we select the following one
 852          */
 853         if( ! p_dvd->i_pack_len )
 854         {
 855             /*
 856              * Read NAV packet.
 857              */
 858             if( ( i_read = DVDReadBlocks( p_dvd->p_title, p_dvd->i_next_vobu,
 859                            1, p_buf ) ) != 1 )
 860             {
 861                 intf_ErrMsg( "dvdread error: read failed for block %d",
 862                              p_dvd->i_next_vobu );
 863                 return -1;
 864             }
 865
 866             /* basic check to be sure we don't have a empty title
 867              * go to next title if so */
 868             //assert( p_buffer[41] == 0xbf && p_buffer[1027] == 0xbf );
 869
 870             /*
 871              * Parse the contained dsi packet.
 872              */
 873
 874             DvdReadHandleDSI( p_dvd, p_buf );
 875
 876             /* End of File */
 877             if( p_dvd->i_next_vobu >= p_dvd->i_end_block + 1 )
 878             {
 879                 return 1;
 880             }
 881
 882             assert( p_dvd->i_pack_len < 1024 );
 883             /* FIXME: Ugly kludge: we send the pack block to the input for it
 884              * sometimes has a zero scr and restart the sync */
 885             p_dvd->i_cur_block ++;
 886             //p_dvd->i_pack_len++;
 887
 888             i_read_total++;
 889             p_buf += DVD_VIDEO_LB_LEN;
 890             i_blocks--;
 891         }
 892
 893         /*
 894          * Compute the number of blocks to read
 895          */
 896         i_blocks_once = p_dvd->i_pack_len >= i_blocks
 897                  ? i_blocks : p_dvd->i_pack_len;
 898         p_dvd->i_pack_len -= i_blocks_once;
 899
 900         /* Reads from DVD */
 901         i_read = DVDReadBlocks( p_dvd->p_title, p_dvd->i_cur_block,
 902                                 i_blocks_once, p_buf );
 903         if( i_read != i_blocks_once )
 904         {
 905             intf_ErrMsg( "dvdread error: read failed for %d/%d blocks at 0x%02x",
 906                          i_read, i_blocks_once, p_dvd->i_cur_block );
 907             return -1;
 908         }
 909
 910         i_blocks -= i_read;
 911         i_read_total += i_read;
 912         p_dvd->i_cur_block += i_read;
 913         p_buf += LB2OFF( i_read );
 914
 915     }
 916 /*
 917     intf_WarnMsg( 12, "dvdread i_blocks: %d len: %d current: 0x%02x", i_read, p_dvd->i_pack_len, p_dvd->i_cur_block );
 918 */
 919
 920     vlc_mutex_lock( &p_input->stream.stream_lock );
 921
 922     p_input->stream.p_selected_area->i_tell =
 923         LB2OFF( p_dvd->i_cur_block ) -
 924             p_input->stream.p_selected_area->i_start;
 925
 926     if( p_dvd->b_eoc )
 927     {
 928         /* We modify i_part only at end of chapter not to erase
 929          * some modification from the interface */
 930         p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 931         p_dvd->b_eoc = 0;
 932     }
 933
 934     if( p_input->stream.p_selected_area->i_tell
 935             >= p_input->stream.p_selected_area->i_size || b_eot )
 936     {
 937         if( ( p_input->stream.p_selected_area->i_id + 1 ) >=
 938                         p_input->stream.i_area_nb )
 939         {
 940             /* EOF */
 941             vlc_mutex_unlock( &p_input->stream.stream_lock );
 942             return 1;
 943         }
 944
 945         /* EOT */
 946         intf_WarnMsg( 4, "dvd info: new title" );
 947         DvdReadSetArea( p_input, p_input->stream.pp_areas[
 948                         p_input->stream.p_selected_area->i_id+1] );
 949         vlc_mutex_unlock( &p_input->stream.stream_lock );
 950         return 0;
 951     }
 952
 953     vlc_mutex_unlock( &p_input->stream.stream_lock );
 954
 955     return LB2OFF( i_read_total );
 956 }
 957 #undef p_pgc
 958
 959 /*****************************************************************************
 960  * DvdReadSeek : Goes to a given position on the stream.
 961  *****************************************************************************
 962  * This one is used by the input and translate chronological position from
 963  * input to logical position on the device.
 964  * The lock should be taken before calling this function.
 965  *****************************************************************************/
 966 static void DvdReadSeek( input_thread_t * p_input, off_t i_off )
 967 {
 968     thread_dvd_data_t *     p_dvd;
 969     int                     i_lb;
 970     int                     i_tmp;
 971     int                     i_chapter = 0;
 972     int                     i_cell = 0;
 973     int                     i_vobu = 0;
 974     int                     i_sub_cell = 0;
 975
 976     i_off += p_input->stream.p_selected_area->i_start;
 977     i_lb = OFF2LB( i_off );
 978     p_dvd = ( thread_dvd_data_t * )p_input->p_access_data;
 979
 980     /* find cell */
 981     while( p_dvd->p_cur_pgc->cell_playback[i_cell].last_sector < i_lb )
 982     {
 983         i_cell++;
 984     }
 985
 986     /* find chapter */
 987     do
 988     {
 989         pgc_t *     p_pgc;
 990         int         pgc_id, pgn;
 991
 992         i_chapter++;
 993         pgc_id = p_dvd->p_vts_file->vts_ptt_srpt->title[
 994                     p_dvd->i_ttn-1].ptt[i_chapter-1].pgcn;
 995         pgn = p_dvd->p_vts_file->vts_ptt_srpt->title[
 996                     p_dvd->i_ttn-1].ptt[i_chapter-1].pgn;
 997
 998         p_pgc = p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc;
 999         i_tmp = p_pgc->program_map[pgn-1];
1000
1001     } while( i_tmp <= i_cell );
1002
1003     /* find vobu */
1004     while( p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu]
1005             <= i_lb )
1006     {
1007         i_vobu++;
1008     }
1009
1010     /* find sub_cell */
1011     while( p_dvd->p_vts_file->vts_c_adt->cell_adr_table[i_sub_cell].start_sector <
1012             p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu-1] )
1013     {
1014         i_sub_cell++;
1015     }
1016
1017 /*
1018     intf_WarnMsg(12, "cell %d i_sub_cell %d chapter %d vobu %d cell_sector %d vobu_sector %d sub_cell_sector %d",
1019             i_cell, i_sub_cell,i_chapter, i_vobu,
1020             p_dvd->p_cur_pgc->cell_playback[i_cell].first_sector,
1021             p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu],
1022             p_dvd->p_vts_file->vts_c_adt->cell_adr_table[i_sub_cell-1].start_sector);
1023 */
1024     p_dvd->i_cur_block = i_lb;
1025     p_dvd->i_next_vobu =
1026         p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu];
1027     p_dvd->i_pack_len = p_dvd->i_next_vobu - i_lb;
1028     p_dvd->i_cur_cell = i_cell;
1029     p_dvd->i_chapter = i_chapter;
1030     DvdReadFindCell( p_dvd );
1031
1032     p_input->stream.p_selected_area->i_tell =
1033         LB2OFF ( p_dvd->i_cur_block )
1034          - p_input->stream.p_selected_area->i_start;
1035     p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
1036
1037     return;
1038 }
1039
1040 /*****************************************************************************
1041  * DvdReadHandleDSI
1042  *****************************************************************************/
1043 static void DvdReadHandleDSI( thread_dvd_data_t * p_dvd, u8 * p_data )
1044 {
1045     navRead_DSI( &(p_dvd->dsi_pack), &(p_data[ DSI_START_BYTE ]) );
1046
1047     /*
1048      * Determine where we go next.  These values are the ones we mostly
1049      * care about.
1050      */
1051     p_dvd->i_cur_block = p_dvd->dsi_pack.dsi_gi.nv_pck_lbn;
1052
1053     /*
1054      * If we're not at the end of this cell, we can determine the next
1055      * VOBU to display using the VOBU_SRI information section of the
1056      * DSI.  Using this value correctly follows the current angle,
1057      * avoiding the doubled scenes in The Matrix, and makes our life
1058      * really happy.
1059      */
1060     if( p_dvd->dsi_pack.vobu_sri.next_vobu != SRI_END_OF_CELL )
1061     {
1062 #if 1
1063         switch( ( p_dvd->dsi_pack.sml_pbi.category & 0xf000 ) >> 12 )
1064         {
1065             case 0x4:
1066                 /* interleaved unit with no angle */
1067                 if( p_dvd->dsi_pack.sml_pbi.ilvu_sa != -1 )
1068                 {
1069                     p_dvd->i_next_vobu = p_dvd->i_cur_block +
1070                         p_dvd->dsi_pack.sml_pbi.ilvu_sa;
1071                     p_dvd->i_pack_len = p_dvd->dsi_pack.sml_pbi.ilvu_ea;
1072                 }
1073                 else
1074                 {
1075                     p_dvd->i_next_vobu = p_dvd->i_cur_block +
1076                         p_dvd->dsi_pack.dsi_gi.vobu_ea + 1;
1077                     p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1078                 }
1079                 break;
1080             case 0x5:
1081                 /* vobu is end of ilvu */
1082                 if( p_dvd->dsi_pack.sml_agli.data[p_dvd->i_angle-1].address )
1083                 {
1084                     p_dvd->i_next_vobu = p_dvd->i_cur_block +
1085                         p_dvd->dsi_pack.sml_agli.data[p_dvd->i_angle-1].address;
1086                     p_dvd->i_pack_len = p_dvd->dsi_pack.sml_pbi.ilvu_ea;
1087
1088                     break;
1089                 }
1090             case 0x6:
1091                 /* vobu is beginning of ilvu */
1092             case 0x9:
1093                 /* next scr is 0 */
1094             case 0xa:
1095                 /* entering interleaved section */
1096             case 0x8:
1097                 /* non interleaved cells in interleaved section */
1098             default:
1099                 p_dvd->i_next_vobu = p_dvd->i_cur_block +
1100                     ( p_dvd->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1101                 p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1102                 break;
1103         }
1104 #else
1105         p_dvd->i_next_vobu = p_dvd->i_cur_block +
1106             ( p_dvd->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1107         p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1108 #endif
1109     }
1110     else
1111     {
1112         p_dvd->i_cur_cell = p_dvd->i_next_cell;
1113         DvdReadFindCell( p_dvd );
1114
1115         p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1116         p_dvd->i_next_vobu =
1117             p_dvd->p_cur_pgc->cell_playback[p_dvd->i_cur_cell].first_sector;
1118     }
1119
1120 #if 0
1121     intf_WarnMsg( 12, "scr %d lbn 0x%02x vobu_ea %d vob_id %d c_id %d",
1122             p_dvd->dsi_pack.dsi_gi.nv_pck_scr,
1123             p_dvd->dsi_pack.dsi_gi.nv_pck_lbn,
1124             p_dvd->dsi_pack.dsi_gi.vobu_ea,
1125             p_dvd->dsi_pack.dsi_gi.vobu_vob_idn,
1126             p_dvd->dsi_pack.dsi_gi.vobu_c_idn );
1127
1128     intf_WarnMsg( 12, "cat 0x%02x ilvu_ea %d ilvu_sa %d size %d",
1129             p_dvd->dsi_pack.sml_pbi.category,
1130             p_dvd->dsi_pack.sml_pbi.ilvu_ea,
1131             p_dvd->dsi_pack.sml_pbi.ilvu_sa,
1132             p_dvd->dsi_pack.sml_pbi.size );
1133
1134     intf_WarnMsg( 12, "next_vobu %d next_ilvu1 %d next_ilvu2 %d",
1135             p_dvd->dsi_pack.vobu_sri.next_vobu & 0x7fffffff,
1136             p_dvd->dsi_pack.sml_agli.data[ p_dvd->i_angle - 1 ].address,
1137             p_dvd->dsi_pack.sml_agli.data[ p_dvd->i_angle ].address);
1138 #endif
1139 }
1140
1141 /*****************************************************************************
1142  * DvdReadFindCell
1143  *****************************************************************************/
1144 static void DvdReadFindCell( thread_dvd_data_t * p_dvd )
1145 {
1146     int         pgc_id, pgn;
1147     int         i = 0;
1148     pgc_t *     p_pgc;
1149 #define cell p_dvd->p_cur_pgc->cell_playback
1150     if( cell[p_dvd->i_cur_cell].block_type == BLOCK_TYPE_ANGLE_BLOCK )
1151     {
1152 #if 0
1153         p_dvd->i_next_cell = p_dvd->i_cur_cell + p_dvd->i_angle_nb;
1154         p_dvd->i_cur_cell += p_dvd->i_angle - 1;
1155 #else
1156         p_dvd->i_cur_cell += p_dvd->i_angle - 1;
1157
1158         while( cell[p_dvd->i_cur_cell+i].block_mode != BLOCK_MODE_LAST_CELL )
1159         {
1160             i++;
1161         }
1162         p_dvd->i_next_cell = p_dvd->i_cur_cell + i + 1;
1163 #endif
1164     }
1165     else
1166     {
1167         p_dvd->i_next_cell = p_dvd->i_cur_cell + 1;
1168     }
1169 #undef cell
1170     pgc_id = p_dvd->p_vts_file->vts_ptt_srpt->title[
1171                 p_dvd->i_ttn-1].ptt[p_dvd->i_chapter-1].pgcn;
1172     pgn = p_dvd->p_vts_file->vts_ptt_srpt->title[
1173                 p_dvd->i_ttn-1].ptt[p_dvd->i_chapter-1].pgn;
1174     p_pgc = p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc;
1175
1176     if( p_pgc->program_map[pgn-1] <= p_dvd->i_cur_cell )
1177     {
1178         p_dvd->i_chapter++;
1179         p_dvd->b_eoc = 1;
1180     }
1181 }