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

   1 /*****************************************************************************
   2  * dvdread.c : DvdRead input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2001-2004 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Stéphane Borel <stef@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <stdio.h>
  29 #include <stdlib.h>                                      /* malloc(), free() */
  30 #include <string.h>                                              /* strdup() */
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc/input.h>
  34
  35 #include "iso_lang.h"
  36
  37 #include "../demux/ps.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 <sys/stat.h>
  46 #include <string.h>
  47
  48 #include <dvdread/dvd_reader.h>
  49 #include <dvdread/ifo_types.h>
  50 #include <dvdread/ifo_read.h>
  51 #include <dvdread/nav_read.h>
  52 #include <dvdread/nav_print.h>
  53
  54 /*****************************************************************************
  55  * Module descriptor
  56  *****************************************************************************/
  57 #define ANGLE_TEXT N_("DVD angle")
  58 #define ANGLE_LONGTEXT N_( \
  59     "Allows you to select the default DVD angle." )
  60
  61 #define CACHING_TEXT N_("Caching value in ms")
  62 #define CACHING_LONGTEXT N_( \
  63     "Allows you to modify the default caching value for DVDread streams. " \
  64     "This value should be set in millisecond units." )
  65
  66 #define CSSMETHOD_TEXT N_("Method used by libdvdcss for decryption")
  67 #define CSSMETHOD_LONGTEXT N_( \
  68     "Set the method used by libdvdcss for key decryption.\n" \
  69     "title: decrypted title key is guessed from the encrypted sectors of " \
  70            "the stream. Thus it should work with a file as well as the " \
  71            "DVD device. But it sometimes takes much time to decrypt a title " \
  72            "key and may even fail. With this method, the key is only checked "\
  73            "at the beginning of each title, so it won't work if the key " \
  74            "changes in the middle of a title.\n" \
  75     "disc: the disc key is first cracked, then all title keys can be " \
  76            "decrypted instantly, which allows us to check them often.\n" \
  77     "key: the same as \"disc\" if you don't have a file with player keys " \
  78            "at compilation time. If you do, the decryption of the disc key " \
  79            "will be faster with this method. It is the one that was used by " \
  80            "libcss.\n" \
  81     "The default method is: key.")
  82
  83 static char *psz_css_list[] = { "title", "disc", "key" };
  84 static char *psz_css_list_text[] = { N_("title"), N_("Disc"), N_("Key") };
  85
  86 static int  Open ( vlc_object_t * );
  87 static void Close( vlc_object_t * );
  88
  89 vlc_module_begin();
  90     set_shortname( _("DVD without menus") );
  91     set_description( _("DVDRead Input (DVD without menu support)") );
  92     set_category( CAT_INPUT );
  93     set_subcategory( SUBCAT_INPUT_ACCESS );
  94     add_integer( "dvdread-angle", 1, NULL, ANGLE_TEXT,
  95         ANGLE_LONGTEXT, VLC_FALSE );
  96     add_integer( "dvdread-caching", DEFAULT_PTS_DELAY / 1000, NULL,
  97         CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
  98     add_string( "dvdread-css-method", NULL, NULL, CSSMETHOD_TEXT,
  99                 CSSMETHOD_LONGTEXT, VLC_TRUE );
 100         change_string_list( psz_css_list, psz_css_list_text, 0 );
 101     set_capability( "access_demux", 0 );
 102     add_shortcut( "dvd" );
 103     add_shortcut( "dvdread" );
 104     add_shortcut( "dvdsimple" );
 105     set_callbacks( Open, Close );
 106 vlc_module_end();
 107
 108 /* how many blocks DVDRead will read in each loop */
 109 #define DVD_BLOCK_READ_ONCE 4
 110
 111 /*****************************************************************************
 112  * Local prototypes
 113  *****************************************************************************/
 114
 115 struct demux_sys_t
 116 {
 117     /* DVDRead state */
 118     dvd_reader_t *p_dvdread;
 119     dvd_file_t   *p_title;
 120
 121     ifo_handle_t *p_vmg_file;
 122     ifo_handle_t *p_vts_file;
 123
 124     int i_title;
 125     int i_chapter, i_chapters;
 126     int i_angle, i_angles;
 127
 128     tt_srpt_t    *p_tt_srpt;
 129     pgc_t        *p_cur_pgc;
 130     dsi_t        dsi_pack;
 131     int          i_ttn;
 132
 133     int i_pack_len;
 134     int i_cur_block;
 135     int i_next_vobu;
 136
 137     /* Current title start/end blocks */
 138     int i_title_start_block;
 139     int i_title_end_block;
 140     int i_title_blocks;
 141     int i_title_offset;
 142
 143     int i_title_start_cell;
 144     int i_title_end_cell;
 145     int i_cur_cell;
 146     int i_next_cell;
 147
 148     /* Track */
 149     ps_track_t    tk[PS_TK_COUNT];
 150     int           i_mux_rate;
 151
 152     int           i_titles;
 153     input_title_t **titles;
 154
 155     /* Video */
 156     int i_aspect;
 157
 158     /* SPU */
 159     uint32_t clut[16];
 160 };
 161
 162 static int Control   ( demux_t *, int, va_list );
 163 static int Demux     ( demux_t * );
 164 static int DemuxBlock( demux_t *, uint8_t *, int );
 165
 166 static void DemuxTitles( demux_t *, int * );
 167 static void ESNew( demux_t *, int, int );
 168
 169 static int  DvdReadSetArea  ( demux_t *, int, int, int );
 170 static void DvdReadSeek     ( demux_t *, int );
 171 static void DvdReadHandleDSI( demux_t *, uint8_t * );
 172 static void DvdReadFindCell ( demux_t * );
 173
 174 /*****************************************************************************
 175  * Open:
 176  *****************************************************************************/
 177 static int Open( vlc_object_t *p_this )
 178 {
 179     demux_t      *p_demux = (demux_t*)p_this;
 180     demux_sys_t  *p_sys;
 181     char         *psz_name;
 182     char         *psz_dvdcss_env;
 183     dvd_reader_t *p_dvdread;
 184     ifo_handle_t *p_vmg_file;
 185     vlc_value_t  val;
 186
 187     if( !p_demux->psz_path || !*p_demux->psz_path )
 188     {
 189         /* Only when selected */
 190         if( !p_this->b_force ) return VLC_EGENERIC;
 191
 192         psz_name = var_CreateGetString( p_this, "dvd" );
 193         if( !psz_name || !*psz_name )
 194         {
 195             if( psz_name ) free( psz_name );
 196             return VLC_EGENERIC;
 197         }
 198     }
 199     else psz_name = strdup( p_demux->psz_path );
 200
 201 #ifdef WIN32
 202     if( psz_name[0] && psz_name[1] == ':' &&
 203         psz_name[2] == '\\' && psz_name[3] == '\0' ) psz_name[2] = '\0';
 204 #endif
 205
 206     /* Override environment variable DVDCSS_METHOD with config option
 207      * (FIXME: this creates a small memory leak) */
 208     psz_dvdcss_env = config_GetPsz( p_demux, "dvdread-css-method" );
 209     if( psz_dvdcss_env && *psz_dvdcss_env )
 210     {
 211         char *psz_env;
 212
 213         psz_env = malloc( strlen("DVDCSS_METHOD=") +
 214                           strlen( psz_dvdcss_env ) + 1 );
 215         if( !psz_env )
 216         {
 217             free( psz_dvdcss_env );
 218             return VLC_ENOMEM;
 219         }
 220
 221         sprintf( psz_env, "%s%s", "DVDCSS_METHOD=", psz_dvdcss_env );
 222
 223         putenv( psz_env );
 224     }
 225     if( psz_dvdcss_env ) free( psz_dvdcss_env );
 226
 227     /* Open dvdread */
 228     if( !(p_dvdread = DVDOpen( psz_name )) )
 229     {
 230         msg_Err( p_demux, "DVDRead cannot open source: %s", psz_name );
 231         free( psz_name );
 232         return VLC_EGENERIC;
 233     }
 234     free( psz_name );
 235
 236     /* Ifo allocation & initialisation */
 237     if( !( p_vmg_file = ifoOpen( p_dvdread, 0 ) ) )
 238     {
 239         msg_Warn( p_demux, "cannot open VMG info" );
 240         return VLC_EGENERIC;
 241     }
 242     msg_Dbg( p_demux, "VMG opened" );
 243
 244     /* Fill p_demux field */
 245     p_demux->pf_demux = Demux;
 246     p_demux->pf_control = Control;
 247     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 248     memset( p_sys, 0, sizeof( demux_sys_t ) );
 249
 250     ps_track_init( p_sys->tk );
 251     p_sys->i_aspect = -1;
 252     p_sys->i_mux_rate = 0;
 253
 254     p_sys->p_dvdread = p_dvdread;
 255     p_sys->p_vmg_file = p_vmg_file;
 256     p_sys->p_title = NULL;
 257     p_sys->p_vts_file = NULL;
 258
 259     p_sys->i_title = p_sys->i_chapter = -1;
 260
 261     var_Create( p_demux, "dvdread-angle", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 262     var_Get( p_demux, "dvdread-angle", &val );
 263     p_sys->i_angle = val.i_int > 0 ? val.i_int : 1;
 264
 265     DemuxTitles( p_demux, &p_sys->i_angle );
 266     if( DvdReadSetArea( p_demux, 0, 0, p_sys->i_angle ) != VLC_SUCCESS )
 267     {
 268         Close( p_this );
 269         msg_Err( p_demux, "DvdReadSetArea(0,0,%i) failed (can't decrypt DVD?)",
 270                  p_sys->i_angle );
 271         return VLC_EGENERIC;
 272     }
 273
 274     /* Update default_pts to a suitable value for dvdread access */
 275     var_Create( p_demux, "dvdread-caching",
 276                 VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 277
 278     return VLC_SUCCESS;
 279 }
 280
 281 /*****************************************************************************
 282  * Close:
 283  *****************************************************************************/
 284 static void Close( vlc_object_t *p_this )
 285 {
 286     demux_t     *p_demux = (demux_t*)p_this;
 287     demux_sys_t *p_sys = p_demux->p_sys;
 288     int i;
 289
 290     for( i = 0; i < PS_TK_COUNT; i++ )
 291     {
 292         ps_track_t *tk = &p_sys->tk[i];
 293         if( tk->b_seen )
 294         {
 295             es_format_Clean( &tk->fmt );
 296             if( tk->es ) es_out_Del( p_demux->out, tk->es );
 297         }
 298     }
 299
 300     /* Close libdvdread */
 301     if( p_sys->p_title ) DVDCloseFile( p_sys->p_title );
 302     if( p_sys->p_vts_file ) ifoClose( p_sys->p_vts_file );
 303     if( p_sys->p_vmg_file ) ifoClose( p_sys->p_vmg_file );
 304     DVDClose( p_sys->p_dvdread );
 305
 306     free( p_sys );
 307 }
 308
 309 static int64_t dvdtime_to_time( dvd_time_t *dtime, uint8_t still_time )
 310 {
 311 /* Macro to convert Binary Coded Decimal to Decimal */
 312 #define BCD2D(__x__) (((__x__ & 0xf0) >> 4) * 10 + (__x__ & 0x0f))
 313
 314     double f_fps, f_ms;
 315     int64_t i_micro_second = 0;
 316
 317     if (still_time == 0 || still_time == 0xFF)
 318     {
 319         i_micro_second += (int64_t)(BCD2D(dtime->hour)) * 60 * 60 * 1000000;
 320         i_micro_second += (int64_t)(BCD2D(dtime->minute)) * 60 * 1000000;
 321         i_micro_second += (int64_t)(BCD2D(dtime->second)) * 1000000;
 322
 323         switch((dtime->frame_u & 0xc0) >> 6)
 324         {
 325         case 1:
 326             f_fps = 25.0;
 327             break;
 328         case 3:
 329             f_fps = 29.97;
 330             break;
 331         default:
 332             f_fps = 2500.0;
 333             break;
 334         }
 335         f_ms = BCD2D(dtime->frame_u&0x3f) * 1000.0 / f_fps;
 336         i_micro_second += (int64_t)(f_ms * 1000.0);
 337     }
 338     else
 339     {
 340         i_micro_second = still_time;
 341         i_micro_second = (int64_t)((double)i_micro_second * 1000000.0);
 342     }
 343
 344     return i_micro_second;
 345 }
 346
 347 /*****************************************************************************
 348  * Control:
 349  *****************************************************************************/
 350 static int Control( demux_t *p_demux, int i_query, va_list args )
 351 {
 352     demux_sys_t *p_sys = p_demux->p_sys;
 353     double f, *pf;
 354     vlc_bool_t *pb;
 355     int64_t *pi64;
 356     input_title_t ***ppp_title;
 357     int *pi_int;
 358     int i;
 359
 360     switch( i_query )
 361     {
 362         case DEMUX_GET_POSITION:
 363         {
 364             pf = (double*) va_arg( args, double* );
 365
 366             if( p_sys->i_title_blocks > 0 )
 367                 *pf = (double)p_sys->i_title_offset / p_sys->i_title_blocks;
 368             else
 369                 *pf = 0.0;
 370
 371             return VLC_SUCCESS;
 372         }
 373         case DEMUX_SET_POSITION:
 374         {
 375             f = (double)va_arg( args, double );
 376
 377             DvdReadSeek( p_demux, f * p_sys->i_title_blocks );
 378
 379             return VLC_SUCCESS;
 380         }
 381         case DEMUX_GET_TIME:
 382             pi64 = (int64_t*)va_arg( args, int64_t * );
 383             if( p_sys->i_mux_rate > 0 )
 384             {
 385                 *pi64 = (int64_t)1000000 * DVD_VIDEO_LB_LEN *
 386                         p_sys->i_title_offset / 50 / p_sys->i_mux_rate;
 387                 return VLC_SUCCESS;
 388             }
 389             *pi64 = 0;
 390             return VLC_EGENERIC;
 391
 392         case DEMUX_GET_LENGTH:
 393             pi64 = (int64_t*)va_arg( args, int64_t * );
 394             if (p_demux->info.i_title >= 0 && p_demux->info.i_title < p_sys->i_titles)
 395             {
 396                 *pi64 = dvdtime_to_time( &p_sys->p_cur_pgc->playback_time, 0 );
 397                 p_sys->i_mux_rate = p_sys->i_title_blocks * DVD_VIDEO_LB_LEN / (*pi64 / 20000);
 398                 return VLC_SUCCESS;
 399             }
 400             *pi64 = 0;
 401             return VLC_EGENERIC;
 402
 403         /* Special for access_demux */
 404         case DEMUX_CAN_PAUSE:
 405         case DEMUX_CAN_CONTROL_PACE:
 406             /* TODO */
 407             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
 408             *pb = VLC_TRUE;
 409             return VLC_SUCCESS;
 410
 411         case DEMUX_SET_PAUSE_STATE:
 412             return VLC_SUCCESS;
 413
 414         case DEMUX_GET_TITLE_INFO:
 415             ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 416             pi_int    = (int*)va_arg( args, int* );
 417             *((int*)va_arg( args, int* )) = 1; /* Title offset */
 418             *((int*)va_arg( args, int* )) = 1; /* Chapter offset */
 419
 420             /* Duplicate title infos */
 421             *pi_int = p_sys->i_titles;
 422             *ppp_title = malloc( sizeof(input_title_t **) * p_sys->i_titles );
 423             for( i = 0; i < p_sys->i_titles; i++ )
 424             {
 425                 (*ppp_title)[i] = vlc_input_title_Duplicate(p_sys->titles[i]);
 426             }
 427             return VLC_SUCCESS;
 428
 429         case DEMUX_SET_TITLE:
 430             i = (int)va_arg( args, int );
 431             if( DvdReadSetArea( p_demux, i, 0, -1 ) != VLC_SUCCESS )
 432             {
 433                 msg_Warn( p_demux, "cannot set title/chapter" );
 434                 return VLC_EGENERIC;
 435             }
 436             p_demux->info.i_update |=
 437                 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT;
 438             p_demux->info.i_title = i;
 439             p_demux->info.i_seekpoint = 0;
 440             return VLC_SUCCESS;
 441
 442         case DEMUX_SET_SEEKPOINT:
 443             i = (int)va_arg( args, int );
 444             if( DvdReadSetArea( p_demux, -1, i, -1 ) != VLC_SUCCESS )
 445             {
 446                 msg_Warn( p_demux, "cannot set title/chapter" );
 447                 return VLC_EGENERIC;
 448             }
 449             p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 450             p_demux->info.i_seekpoint = i;
 451             return VLC_SUCCESS;
 452
 453         case DEMUX_GET_PTS_DELAY:
 454             pi64 = (int64_t*)va_arg( args, int64_t * );
 455             *pi64 = (int64_t)var_GetInteger( p_demux, "dvdread-caching" )*1000;
 456             return VLC_SUCCESS;
 457
 458         /* TODO implement others */
 459         default:
 460             return VLC_EGENERIC;
 461     }
 462 }
 463
 464 /*****************************************************************************
 465  * Demux:
 466  *****************************************************************************/
 467 static int Demux( demux_t *p_demux )
 468 {
 469     demux_sys_t *p_sys = p_demux->p_sys;
 470
 471     uint8_t p_buffer[DVD_VIDEO_LB_LEN * DVD_BLOCK_READ_ONCE];
 472     int i_blocks_once, i_read;
 473     int i;
 474
 475     /*
 476      * Playback by cell in this pgc, starting at the cell for our chapter.
 477      */
 478
 479     /*
 480      * Check end of pack, and select the following one
 481      */
 482     if( !p_sys->i_pack_len )
 483     {
 484         /* Read NAV packet */
 485         if( DVDReadBlocks( p_sys->p_title, p_sys->i_next_vobu,
 486                            1, p_buffer ) != 1 )
 487         {
 488             msg_Err( p_demux, "read failed for block %d", p_sys->i_next_vobu );
 489             return -1;
 490         }
 491
 492         /* Basic check to be sure we don't have a empty title
 493          * go to next title if so */
 494         //assert( p_buffer[41] == 0xbf && p_buffer[1027] == 0xbf );
 495
 496         /* Parse the contained dsi packet */
 497         DvdReadHandleDSI( p_demux, p_buffer );
 498
 499         /* End of title */
 500         if( p_sys->i_cur_cell >= p_sys->p_cur_pgc->nr_of_cells )
 501         {
 502             if( p_sys->i_title + 1 >= p_sys->i_titles )
 503             {
 504                 return 0; /* EOF */
 505             }
 506
 507             DvdReadSetArea( p_demux, p_sys->i_title + 1, 0, -1 );
 508         }
 509
 510         if( p_sys->i_pack_len >= 1024 )
 511         {
 512             msg_Err( p_demux, "i_pack_len >= 1024 (%i). "
 513                      "This shouldn't happen!", p_sys->i_pack_len );
 514             return 0; /* EOF */
 515         }
 516
 517         /* FIXME: Ugly kludge: we send the pack block to the input for it
 518          * sometimes has a zero scr and restart the sync */
 519         p_sys->i_cur_block++;
 520         p_sys->i_title_offset++;
 521
 522         DemuxBlock( p_demux, p_buffer, DVD_VIDEO_LB_LEN );
 523     }
 524
 525     if( p_sys->i_cur_cell >= p_sys->p_cur_pgc->nr_of_cells )
 526     {
 527         if( p_sys->i_title + 1 >= p_sys->i_titles )
 528         {
 529             return 0; /* EOF */
 530         }
 531
 532         DvdReadSetArea( p_demux, p_sys->i_title + 1, 0, -1 );
 533     }
 534
 535     /*
 536      * Read actual data
 537      */
 538     i_blocks_once = __MIN( p_sys->i_pack_len, DVD_BLOCK_READ_ONCE );
 539     p_sys->i_pack_len -= i_blocks_once;
 540
 541     /* Reads from DVD */
 542     i_read = DVDReadBlocks( p_sys->p_title, p_sys->i_cur_block,
 543                             i_blocks_once, p_buffer );
 544     if( i_read != i_blocks_once )
 545     {
 546         msg_Err( p_demux, "read failed for %d/%d blocks at 0x%02x",
 547                  i_read, i_blocks_once, p_sys->i_cur_block );
 548         return -1;
 549     }
 550
 551     p_sys->i_cur_block += i_read;
 552     p_sys->i_title_offset += i_read;
 553
 554 #if 0
 555     msg_Dbg( p_demux, "i_blocks: %d len: %d current: 0x%02x",
 556              i_read, p_sys->i_pack_len, p_sys->i_cur_block );
 557 #endif
 558
 559     for( i = 0; i < i_read; i++ )
 560     {
 561         DemuxBlock( p_demux, p_buffer + i * DVD_VIDEO_LB_LEN,
 562                     DVD_VIDEO_LB_LEN );
 563     }
 564
 565 #undef p_pgc
 566
 567     return 1;
 568 }
 569
 570 /*****************************************************************************
 571  * DemuxBlock: demux a given block
 572  *****************************************************************************/
 573 static int DemuxBlock( demux_t *p_demux, uint8_t *pkt, int i_pkt )
 574 {
 575     demux_sys_t *p_sys = p_demux->p_sys;
 576     uint8_t     *p = pkt;
 577
 578     while( p < &pkt[i_pkt] )
 579     {
 580         int i_size = ps_pkt_size( p, &pkt[i_pkt] - p );
 581         block_t *p_pkt;
 582         if( i_size <= 0 )
 583         {
 584             break;
 585         }
 586
 587         /* Create a block */
 588         p_pkt = block_New( p_demux, i_size );
 589         memcpy( p_pkt->p_buffer, p, i_size);
 590
 591         /* Parse it and send it */
 592         switch( 0x100 | p[3] )
 593         {
 594         case 0x1b9:
 595         case 0x1bb:
 596         case 0x1bc:
 597
 598 #ifdef DVDREAD_DEBUG
 599             if( p[3] == 0xbc )
 600             {
 601                 msg_Warn( p_demux, "received a PSM packet" );
 602             }
 603             else if( p[3] == 0xbb )
 604             {
 605                 msg_Warn( p_demux, "received a SYSTEM packet" );
 606             }
 607 #endif
 608             block_Release( p_pkt );
 609             break;
 610
 611         case 0x1ba:
 612         {
 613             int64_t i_scr;
 614             int i_mux_rate;
 615             if( !ps_pkt_parse_pack( p_pkt, &i_scr, &i_mux_rate ) )
 616             {
 617                 es_out_Control( p_demux->out, ES_OUT_SET_PCR, i_scr );
 618 /*                if( i_mux_rate > 0 ) p_sys->i_mux_rate = i_mux_rate;*/
 619             }
 620             block_Release( p_pkt );
 621             break;
 622         }
 623         default:
 624         {
 625             int i_id = ps_pkt_id( p_pkt );
 626             if( i_id >= 0xc0 )
 627             {
 628                 ps_track_t *tk = &p_sys->tk[PS_ID_TO_TK(i_id)];
 629
 630                 if( !tk->b_seen )
 631                 {
 632                     ESNew( p_demux, i_id, 0 );
 633                 }
 634                 if( tk->b_seen && tk->es &&
 635                     !ps_pkt_parse_pes( p_pkt, tk->i_skip ) )
 636                 {
 637                     es_out_Send( p_demux->out, tk->es, p_pkt );
 638                 }
 639                 else
 640                 {
 641                     block_Release( p_pkt );
 642                 }
 643             }
 644             else
 645             {
 646                 block_Release( p_pkt );
 647             }
 648             break;
 649         }
 650         }
 651
 652         p += i_size;
 653     }
 654
 655     return VLC_SUCCESS;
 656 }
 657
 658 /*****************************************************************************
 659  * ESNew: register a new elementary stream
 660  *****************************************************************************/
 661 static void ESNew( demux_t *p_demux, int i_id, int i_lang )
 662 {
 663     demux_sys_t *p_sys = p_demux->p_sys;
 664     ps_track_t  *tk = &p_sys->tk[PS_ID_TO_TK(i_id)];
 665     char psz_language[3];
 666
 667     if( tk->b_seen ) return;
 668
 669     if( ps_track_fill( tk, 0, i_id ) )
 670     {
 671         msg_Warn( p_demux, "unknown codec for id=0x%x", i_id );
 672         return;
 673     }
 674
 675     psz_language[0] = psz_language[1] = psz_language[2] = 0;
 676     if( i_lang && i_lang != 0xffff )
 677     {
 678         psz_language[0] = (i_lang >> 8)&0xff;
 679         psz_language[1] = (i_lang     )&0xff;
 680     }
 681
 682     /* Add a new ES */
 683     if( tk->fmt.i_cat == VIDEO_ES )
 684     {
 685         if( p_sys->i_aspect >= 0 )
 686         {
 687             tk->fmt.video.i_aspect = p_sys->i_aspect;
 688         }
 689     }
 690     else if( tk->fmt.i_cat == AUDIO_ES )
 691     {
 692         int i_audio = -1;
 693         /* find the audio number PLEASE find another way */
 694         if( (i_id&0xbdf8) == 0xbd88 )       /* dts */
 695         {
 696             i_audio = i_id&0x07;
 697         }
 698         else if( (i_id&0xbdf0) == 0xbd80 )  /* a52 */
 699         {
 700             i_audio = i_id&0xf;
 701         }
 702         else if( (i_id&0xbdf0) == 0xbda0 )  /* lpcm */
 703         {
 704             i_audio = i_id&0x1f;
 705         }
 706         else if( ( i_id&0xe0 ) == 0xc0 )    /* mpga */
 707         {
 708             i_audio = i_id&0x1f;
 709         }
 710
 711         if( psz_language[0] ) tk->fmt.psz_language = strdup( psz_language );
 712     }
 713     else if( tk->fmt.i_cat == SPU_ES )
 714     {
 715         /* Palette */
 716         tk->fmt.subs.spu.palette[0] = 0xBeef;
 717         memcpy( &tk->fmt.subs.spu.palette[1], p_sys->clut,
 718                 16 * sizeof( uint32_t ) );
 719
 720         if( psz_language[0] ) tk->fmt.psz_language = strdup( psz_language );
 721     }
 722
 723     tk->es = es_out_Add( p_demux->out, &tk->fmt );
 724     tk->b_seen = VLC_TRUE;
 725 }
 726
 727 /*****************************************************************************
 728  * DvdReadSetArea: initialize input data for title x, chapter y.
 729  * It should be called for each user navigation request.
 730  *****************************************************************************
 731  * Take care that i_title and i_chapter start from 0.
 732  *****************************************************************************/
 733 static int DvdReadSetArea( demux_t *p_demux, int i_title, int i_chapter,
 734                            int i_angle )
 735 {
 736     demux_sys_t *p_sys = p_demux->p_sys;
 737     int pgc_id = 0, pgn = 0;
 738     int i;
 739
 740 #define p_pgc p_sys->p_cur_pgc
 741 #define p_vmg p_sys->p_vmg_file
 742 #define p_vts p_sys->p_vts_file
 743
 744     if( i_title >= 0 && i_title < p_sys->i_titles &&
 745         i_title != p_sys->i_title )
 746     {
 747         int i_start_cell, i_end_cell;
 748
 749         if( p_sys->p_title != NULL ) DVDCloseFile( p_sys->p_title );
 750         if( p_vts != NULL ) ifoClose( p_vts );
 751         p_sys->i_title = i_title;
 752
 753         /*
 754          *  We have to load all title information
 755          */
 756         msg_Dbg( p_demux, "open VTS %d, for title %d",
 757                  p_vmg->tt_srpt->title[i_title].title_set_nr, i_title + 1 );
 758
 759         /* Ifo vts */
 760         if( !( p_vts = ifoOpen( p_sys->p_dvdread,
 761                p_vmg->tt_srpt->title[i_title].title_set_nr ) ) )
 762         {
 763             msg_Err( p_demux, "fatal error in vts ifo" );
 764             return VLC_EGENERIC;
 765         }
 766
 767         /* Title position inside the selected vts */
 768         p_sys->i_ttn = p_vmg->tt_srpt->title[i_title].vts_ttn;
 769
 770         /* Find title start/end */
 771         pgc_id = p_vts->vts_ptt_srpt->title[p_sys->i_ttn - 1].ptt[0].pgcn;
 772         pgn = p_vts->vts_ptt_srpt->title[p_sys->i_ttn - 1].ptt[0].pgn;
 773         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
 774
 775         p_sys->i_title_start_cell =
 776             i_start_cell = p_pgc->program_map[pgn - 1] - 1;
 777         p_sys->i_title_start_block =
 778             p_pgc->cell_playback[i_start_cell].first_sector;
 779
 780         p_sys->i_title_end_cell =
 781             i_end_cell = p_pgc->nr_of_cells - 1;
 782         p_sys->i_title_end_block =
 783             p_pgc->cell_playback[i_end_cell].last_sector;
 784
 785         p_sys->i_title_offset = 0;
 786
 787         p_sys->i_title_blocks = 0;
 788         for( i = i_start_cell; i <= i_end_cell; i++ )
 789         {
 790             p_sys->i_title_blocks += p_pgc->cell_playback[i].last_sector -
 791                 p_pgc->cell_playback[i].first_sector + 1;
 792         }
 793
 794         msg_Dbg( p_demux, "title %d vts_title %d pgc %d pgn %d "
 795                  "start %d end %d blocks: %d",
 796                  i_title + 1, p_sys->i_ttn, pgc_id, pgn,
 797                  p_sys->i_title_start_block, p_sys->i_title_end_block,
 798                  p_sys->i_title_blocks );
 799
 800         /*
 801          * Set properties for current chapter
 802          */
 803         p_sys->i_chapter = 0;
 804         p_sys->i_chapters =
 805             p_vts->vts_ptt_srpt->title[p_sys->i_ttn - 1].nr_of_ptts;
 806
 807         pgc_id = p_vts->vts_ptt_srpt->title[
 808                     p_sys->i_ttn - 1].ptt[p_sys->i_chapter].pgcn;
 809         pgn = p_vts->vts_ptt_srpt->title[
 810                     p_sys->i_ttn - 1].ptt[p_sys->i_chapter].pgn;
 811
 812         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
 813         p_sys->i_pack_len = 0;
 814         p_sys->i_next_cell =
 815             p_sys->i_cur_cell = p_pgc->program_map[pgn - 1] - 1;
 816         DvdReadFindCell( p_demux );
 817
 818         p_sys->i_next_vobu = p_sys->i_cur_block =
 819             p_pgc->cell_playback[p_sys->i_cur_cell].first_sector;
 820
 821         /*
 822          * Angle management
 823          */
 824         p_sys->i_angles = p_vmg->tt_srpt->title[i_title].nr_of_angles;
 825         if( p_sys->i_angle > p_sys->i_angles ) p_sys->i_angle = 1;
 826
 827         /*
 828          * We've got enough info, time to open the title set data.
 829          */
 830         if( !( p_sys->p_title = DVDOpenFile( p_sys->p_dvdread,
 831             p_vmg->tt_srpt->title[i_title].title_set_nr,
 832             DVD_READ_TITLE_VOBS ) ) )
 833         {
 834             msg_Err( p_demux, "cannot open title (VTS_%02d_1.VOB)",
 835                      p_vmg->tt_srpt->title[i_title].title_set_nr );
 836             return VLC_EGENERIC;
 837         }
 838
 839         //IfoPrintTitle( p_demux );
 840
 841         /*
 842          * Destroy obsolete ES by reinitializing program 0
 843          * and find all ES in title with ifo data
 844          */
 845         es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 846
 847         for( i = 0; i < PS_TK_COUNT; i++ )
 848         {
 849             ps_track_t *tk = &p_sys->tk[i];
 850             if( tk->b_seen )
 851             {
 852                 es_format_Clean( &tk->fmt );
 853                 if( tk->es ) es_out_Del( p_demux->out, tk->es );
 854             }
 855             tk->b_seen = VLC_FALSE;
 856         }
 857
 858         if( p_demux->info.i_title != i_title )
 859         {
 860             p_demux->info.i_update |=
 861                 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT;
 862             p_demux->info.i_title = i_title;
 863             p_demux->info.i_seekpoint = 0;
 864         }
 865
 866         /* TODO: re-add angles */
 867
 868
 869         ESNew( p_demux, 0xe0, 0 ); /* Video, FIXME ? */
 870         p_sys->i_aspect = p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio;
 871
 872 #define audio_control \
 873     p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->audio_control[i-1]
 874
 875         /* Audio ES, in the order they appear in the .ifo */
 876         for( i = 1; i <= p_vts->vtsi_mat->nr_of_vts_audio_streams; i++ )
 877         {
 878             int i_position = 0;
 879             uint16_t i_id;
 880
 881             //IfoPrintAudio( p_demux, i );
 882
 883             /* Audio channel is active if first byte is 0x80 */
 884             if( audio_control & 0x8000 )
 885             {
 886                 i_position = ( audio_control & 0x7F00 ) >> 8;
 887
 888                 msg_Dbg( p_demux, "audio position  %d", i_position );
 889                 switch( p_vts->vtsi_mat->vts_audio_attr[i - 1].audio_format )
 890                 {
 891                 case 0x00: /* A52 */
 892                     i_id = (0x80 + i_position) | 0xbd00;
 893                     break;
 894                 case 0x02:
 895                 case 0x03: /* MPEG audio */
 896                     i_id = 0xc000 + i_position;
 897                     break;
 898                 case 0x04: /* LPCM */
 899                     i_id = (0xa0 + i_position) | 0xbd00;
 900                     break;
 901                 case 0x06: /* DTS */
 902                     i_id = (0x88 + i_position) | 0xbd00;
 903                     break;
 904                 default:
 905                     i_id = 0;
 906                     msg_Err( p_demux, "unknown audio type %.2x",
 907                         p_vts->vtsi_mat->vts_audio_attr[i - 1].audio_format );
 908                 }
 909
 910                 ESNew( p_demux, i_id, p_sys->p_vts_file->vtsi_mat->
 911                        vts_audio_attr[i - 1].lang_code );
 912             }
 913         }
 914 #undef audio_control
 915
 916 #define spu_palette \
 917     p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->palette
 918
 919         memcpy( p_sys->clut, spu_palette, 16 * sizeof( uint32_t ) );
 920
 921 #define spu_control \
 922     p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->subp_control[i-1]
 923
 924         /* Sub Picture ES */
 925         for( i = 1; i <= p_vts->vtsi_mat->nr_of_vts_subp_streams; i++ )
 926         {
 927             int i_position = 0;
 928             uint16_t i_id;
 929
 930             //IfoPrintSpu( p_sys, i );
 931             msg_Dbg( p_demux, "spu %d 0x%02x", i, spu_control );
 932
 933             if( spu_control & 0x80000000 )
 934             {
 935                 /*  there are several streams for one spu */
 936                 if( p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
 937                 {
 938                     /* 16:9 */
 939                     switch( p_vts->vtsi_mat->vts_video_attr.permitted_df )
 940                     {
 941                     case 1: /* letterbox */
 942                         i_position = spu_control & 0xff;
 943                         break;
 944                     case 2: /* pan&scan */
 945                         i_position = ( spu_control >> 8 ) & 0xff;
 946                         break;
 947                     default: /* widescreen */
 948                         i_position = ( spu_control >> 16 ) & 0xff;
 949                         break;
 950                     }
 951                 }
 952                 else
 953                 {
 954                     /* 4:3 */
 955                     i_position = ( spu_control >> 24 ) & 0x7F;
 956                 }
 957
 958                 i_id = (0x20 + i_position) | 0xbd00;
 959
 960                 ESNew( p_demux, i_id, p_sys->p_vts_file->vtsi_mat->
 961                        vts_subp_attr[i - 1].lang_code );
 962             }
 963         }
 964 #undef spu_control
 965
 966     }
 967     else if( i_title != -1 && i_title != p_sys->i_title )
 968
 969     {
 970         return VLC_EGENERIC; /* Couldn't set title */
 971     }
 972
 973     /*
 974      * Chapter selection
 975      */
 976
 977     if( i_chapter >= 0 && i_chapter < p_sys->i_chapters )
 978     {
 979         pgc_id = p_vts->vts_ptt_srpt->title[
 980                      p_sys->i_ttn - 1].ptt[i_chapter].pgcn;
 981         pgn = p_vts->vts_ptt_srpt->title[
 982                   p_sys->i_ttn - 1].ptt[i_chapter].pgn;
 983
 984         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
 985
 986         p_sys->i_cur_cell = p_pgc->program_map[pgn - 1] - 1;
 987         p_sys->i_chapter = i_chapter;
 988         DvdReadFindCell( p_demux );
 989
 990         p_sys->i_title_offset = 0;
 991         for( i = p_sys->i_title_start_cell; i < p_sys->i_cur_cell; i++ )
 992         {
 993             p_sys->i_title_offset += p_pgc->cell_playback[i].last_sector -
 994                 p_pgc->cell_playback[i].first_sector + 1;
 995         }
 996
 997         p_sys->i_pack_len = 0;
 998         p_sys->i_next_vobu = p_sys->i_cur_block =
 999             p_pgc->cell_playback[p_sys->i_cur_cell].first_sector;
1000
1001         if( p_demux->info.i_seekpoint != i_chapter )
1002         {
1003             p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
1004             p_demux->info.i_seekpoint = i_chapter;
1005         }
1006     }
1007     else if( i_chapter != -1 )
1008
1009     {
1010         return VLC_EGENERIC; /* Couldn't set chapter */
1011     }
1012
1013 #undef p_pgc
1014 #undef p_vts
1015 #undef p_vmg
1016
1017     return VLC_SUCCESS;
1018 }
1019
1020 /*****************************************************************************
1021  * DvdReadSeek : Goes to a given position on the stream.
1022  *****************************************************************************
1023  * This one is used by the input and translate chronological position from
1024  * input to logical position on the device.
1025  *****************************************************************************/
1026 static void DvdReadSeek( demux_t *p_demux, int i_block_offset )
1027 {
1028     demux_sys_t *p_sys = p_demux->p_sys;
1029     int i_chapter = 0;
1030     int i_cell = 0;
1031     int i_vobu = 0;
1032     int i_sub_cell = 0;
1033     int i_block;
1034
1035 #define p_pgc p_sys->p_cur_pgc
1036 #define p_vts p_sys->p_vts_file
1037
1038     /* Find cell */
1039     i_block = i_block_offset;
1040     for( i_cell = p_sys->i_title_start_cell;
1041          i_cell <= p_sys->i_title_end_cell; i_cell++ )
1042     {
1043         if( i_block < (int)p_pgc->cell_playback[i_cell].last_sector -
1044             (int)p_pgc->cell_playback[i_cell].first_sector + 1 ) break;
1045
1046         i_block -= (p_pgc->cell_playback[i_cell].last_sector -
1047             p_pgc->cell_playback[i_cell].first_sector + 1);
1048     }
1049     if( i_cell > p_sys->i_title_end_cell )
1050     {
1051         msg_Err( p_demux, "couldn't find cell for block %i", i_block_offset );
1052         return;
1053     }
1054     i_block += p_pgc->cell_playback[i_cell].first_sector;
1055     p_sys->i_title_offset = i_block_offset;
1056
1057     /* Find chapter */
1058     for( i_chapter = 0; i_chapter < p_sys->i_chapters; i_chapter++ )
1059     {
1060         int pgc_id, pgn, i_tmp;
1061
1062         pgc_id = p_vts->vts_ptt_srpt->title[
1063                     p_sys->i_ttn - 1].ptt[i_chapter].pgcn;
1064         pgn = p_vts->vts_ptt_srpt->title[
1065                     p_sys->i_ttn - 1].ptt[i_chapter].pgn;
1066
1067         i_tmp = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc->program_map[pgn-1];
1068
1069         if( i_tmp > i_cell ) break;
1070     }
1071
1072     if( i_chapter < p_sys->i_chapters &&
1073         p_demux->info.i_seekpoint != i_chapter )
1074     {
1075         p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
1076         p_demux->info.i_seekpoint = i_chapter;
1077     }
1078
1079     /* Find vobu */
1080     while( (int)p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu] <= i_block )
1081     {
1082         i_vobu++;
1083     }
1084
1085     /* Find sub_cell */
1086     while( p_vts->vts_c_adt->cell_adr_table[i_sub_cell].start_sector <
1087            p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu-1] )
1088     {
1089         i_sub_cell++;
1090     }
1091
1092 #if 1
1093     msg_Dbg( p_demux, "cell %d i_sub_cell %d chapter %d vobu %d "
1094              "cell_sector %d vobu_sector %d sub_cell_sector %d",
1095              i_cell, i_sub_cell, i_chapter, i_vobu,
1096              p_sys->p_cur_pgc->cell_playback[i_cell].first_sector,
1097              p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu],
1098              p_vts->vts_c_adt->cell_adr_table[i_sub_cell - 1].start_sector);
1099 #endif
1100
1101     p_sys->i_cur_block = i_block;
1102     p_sys->i_next_vobu = p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu];
1103     p_sys->i_pack_len = p_sys->i_next_vobu - i_block;
1104     p_sys->i_cur_cell = i_cell;
1105     p_sys->i_chapter = i_chapter;
1106     DvdReadFindCell( p_demux );
1107
1108 #undef p_vts
1109 #undef p_pgc
1110
1111     return;
1112 }
1113
1114 /*****************************************************************************
1115  * DvdReadHandleDSI
1116  *****************************************************************************/
1117 static void DvdReadHandleDSI( demux_t *p_demux, uint8_t *p_data )
1118 {
1119     demux_sys_t *p_sys = p_demux->p_sys;
1120
1121     navRead_DSI( &p_sys->dsi_pack, &p_data[DSI_START_BYTE] );
1122
1123     /*
1124      * Determine where we go next.  These values are the ones we mostly
1125      * care about.
1126      */
1127     p_sys->i_cur_block = p_sys->dsi_pack.dsi_gi.nv_pck_lbn;
1128     p_sys->i_pack_len = p_sys->dsi_pack.dsi_gi.vobu_ea;
1129
1130     /*
1131      * If we're not at the end of this cell, we can determine the next
1132      * VOBU to display using the VOBU_SRI information section of the
1133      * DSI.  Using this value correctly follows the current angle,
1134      * avoiding the doubled scenes in The Matrix, and makes our life
1135      * really happy.
1136      */
1137
1138     p_sys->i_next_vobu = p_sys->i_cur_block +
1139         ( p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1140
1141     if( p_sys->dsi_pack.vobu_sri.next_vobu != SRI_END_OF_CELL
1142         && p_sys->i_angle > 1 )
1143     {
1144         switch( ( p_sys->dsi_pack.sml_pbi.category & 0xf000 ) >> 12 )
1145         {
1146         case 0x4:
1147             /* Interleaved unit with no angle */
1148             if( p_sys->dsi_pack.sml_pbi.ilvu_sa != 0 )
1149             {
1150                 p_sys->i_next_vobu = p_sys->i_cur_block +
1151                     p_sys->dsi_pack.sml_pbi.ilvu_sa;
1152                 p_sys->i_pack_len = p_sys->dsi_pack.sml_pbi.ilvu_ea;
1153             }
1154             else
1155             {
1156                 p_sys->i_next_vobu = p_sys->i_cur_block +
1157                     p_sys->dsi_pack.dsi_gi.vobu_ea + 1;
1158             }
1159             break;
1160         case 0x5:
1161             /* vobu is end of ilvu */
1162             if( p_sys->dsi_pack.sml_agli.data[p_sys->i_angle-1].address )
1163             {
1164                 p_sys->i_next_vobu = p_sys->i_cur_block +
1165                     p_sys->dsi_pack.sml_agli.data[p_sys->i_angle-1].address;
1166                 p_sys->i_pack_len = p_sys->dsi_pack.sml_pbi.ilvu_ea;
1167
1168                 break;
1169             }
1170         case 0x6:
1171             /* vobu is beginning of ilvu */
1172         case 0x9:
1173             /* next scr is 0 */
1174         case 0xa:
1175             /* entering interleaved section */
1176         case 0x8:
1177             /* non interleaved cells in interleaved section */
1178         default:
1179             p_sys->i_next_vobu = p_sys->i_cur_block +
1180                 ( p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1181             break;
1182         }
1183     }
1184     else if( p_sys->dsi_pack.vobu_sri.next_vobu == SRI_END_OF_CELL )
1185     {
1186         p_sys->i_cur_cell = p_sys->i_next_cell;
1187
1188         /* End of title */
1189         if( p_sys->i_cur_cell >= p_sys->p_cur_pgc->nr_of_cells ) return;
1190
1191         DvdReadFindCell( p_demux );
1192
1193         p_sys->i_next_vobu =
1194             p_sys->p_cur_pgc->cell_playback[p_sys->i_cur_cell].first_sector;
1195     }
1196
1197 #if 0
1198     msg_Dbg( p_demux, 12, "scr %d lbn 0x%02x vobu_ea %d vob_id %d c_id %d",
1199              p_sys->dsi_pack.dsi_gi.nv_pck_scr,
1200              p_sys->dsi_pack.dsi_gi.nv_pck_lbn,
1201              p_sys->dsi_pack.dsi_gi.vobu_ea,
1202              p_sys->dsi_pack.dsi_gi.vobu_vob_idn,
1203              p_sys->dsi_pack.dsi_gi.vobu_c_idn );
1204
1205     msg_Dbg( p_demux, 12, "cat 0x%02x ilvu_ea %d ilvu_sa %d size %d",
1206              p_sys->dsi_pack.sml_pbi.category,
1207              p_sys->dsi_pack.sml_pbi.ilvu_ea,
1208              p_sys->dsi_pack.sml_pbi.ilvu_sa,
1209              p_sys->dsi_pack.sml_pbi.size );
1210
1211     msg_Dbg( p_demux, 12, "next_vobu %d next_ilvu1 %d next_ilvu2 %d",
1212              p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff,
1213              p_sys->dsi_pack.sml_agli.data[ p_sys->i_angle - 1 ].address,
1214              p_sys->dsi_pack.sml_agli.data[ p_sys->i_angle ].address);
1215 #endif
1216 }
1217
1218 /*****************************************************************************
1219  * DvdReadFindCell
1220  *****************************************************************************/
1221 static void DvdReadFindCell( demux_t *p_demux )
1222 {
1223     demux_sys_t *p_sys = p_demux->p_sys;
1224
1225     pgc_t *p_pgc;
1226     int   pgc_id, pgn;
1227     int   i = 0;
1228
1229 #define cell p_sys->p_cur_pgc->cell_playback
1230
1231     if( cell[p_sys->i_cur_cell].block_type == BLOCK_TYPE_ANGLE_BLOCK )
1232     {
1233         p_sys->i_cur_cell += p_sys->i_angle - 1;
1234
1235         while( cell[p_sys->i_cur_cell+i].block_mode != BLOCK_MODE_LAST_CELL )
1236         {
1237             i++;
1238         }
1239         p_sys->i_next_cell = p_sys->i_cur_cell + i + 1;
1240     }
1241     else
1242     {
1243         p_sys->i_next_cell = p_sys->i_cur_cell + 1;
1244     }
1245
1246 #undef cell
1247
1248     if( p_sys->i_chapter + 1 >= p_sys->i_chapters ) return;
1249
1250     pgc_id = p_sys->p_vts_file->vts_ptt_srpt->title[
1251                 p_sys->i_ttn - 1].ptt[p_sys->i_chapter + 1].pgcn;
1252     pgn = p_sys->p_vts_file->vts_ptt_srpt->title[
1253               p_sys->i_ttn - 1].ptt[p_sys->i_chapter + 1].pgn;
1254     p_pgc = p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
1255
1256     if( p_sys->i_cur_cell >= p_pgc->program_map[pgn - 1] - 1 )
1257     {
1258         p_sys->i_chapter++;
1259
1260         if( p_sys->i_chapter < p_sys->i_chapters &&
1261             p_demux->info.i_seekpoint != p_sys->i_chapter )
1262         {
1263             p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
1264             p_demux->info.i_seekpoint = p_sys->i_chapter;
1265         }
1266     }
1267 }
1268
1269 /*****************************************************************************
1270  * DemuxTitles: get the titles/chapters structure
1271  *****************************************************************************/
1272 static void DemuxTitles( demux_t *p_demux, int *pi_angle )
1273 {
1274     demux_sys_t *p_sys = p_demux->p_sys;
1275     input_title_t *t;
1276     seekpoint_t *s;
1277     int32_t i_titles;
1278     int i;
1279
1280     /* Find out number of titles/chapters */
1281 #define tt_srpt p_sys->p_vmg_file->tt_srpt
1282
1283     i_titles = tt_srpt->nr_of_srpts;
1284     msg_Dbg( p_demux, "number of titles: %d", i_titles );
1285
1286     for( i = 0; i < i_titles; i++ )
1287     {
1288         int32_t i_chapters = 0;
1289         int j;
1290
1291         i_chapters = tt_srpt->title[i].nr_of_ptts;
1292         msg_Dbg( p_demux, "title %d has %d chapters", i, i_chapters );
1293
1294         t = vlc_input_title_New();
1295
1296         for( j = 0; j < __MAX( i_chapters, 1 ); j++ )
1297         {
1298             s = vlc_seekpoint_New();
1299             TAB_APPEND( t->i_seekpoint, t->seekpoint, s );
1300         }
1301
1302         TAB_APPEND( p_sys->i_titles, p_sys->titles, t );
1303     }
1304
1305 #undef tt_srpt
1306 }