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_name( _("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     DvdReadSetArea( p_demux, 0, 0, p_sys->i_angle );
 267
 268     /* Update default_pts to a suitable value for dvdread access */
 269     var_Create( p_demux, "dvdread-caching",
 270                 VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 271
 272     return VLC_SUCCESS;
 273 }
 274
 275 /*****************************************************************************
 276  * Close:
 277  *****************************************************************************/
 278 static void Close( vlc_object_t *p_this )
 279 {
 280     demux_t     *p_demux = (demux_t*)p_this;
 281     demux_sys_t *p_sys = p_demux->p_sys;
 282     int i;
 283
 284     for( i = 0; i < PS_TK_COUNT; i++ )
 285     {
 286         ps_track_t *tk = &p_sys->tk[i];
 287         if( tk->b_seen )
 288         {
 289             es_format_Clean( &tk->fmt );
 290             if( tk->es ) es_out_Del( p_demux->out, tk->es );
 291         }
 292     }
 293
 294     /* Close libdvdread */
 295     if( p_sys->p_title ) DVDCloseFile( p_sys->p_title );
 296     if( p_sys->p_vts_file ) ifoClose( p_sys->p_vts_file );
 297     if( p_sys->p_vmg_file ) ifoClose( p_sys->p_vmg_file );
 298     DVDClose( p_sys->p_dvdread );
 299
 300     free( p_sys );
 301 }
 302
 303 /*****************************************************************************
 304  * Control:
 305  *****************************************************************************/
 306 static int Control( demux_t *p_demux, int i_query, va_list args )
 307 {
 308     demux_sys_t *p_sys = p_demux->p_sys;
 309     double f, *pf;
 310     vlc_bool_t *pb;
 311     int64_t *pi64;
 312     input_title_t ***ppp_title;
 313     int *pi_int;
 314     int i;
 315
 316     switch( i_query )
 317     {
 318         case DEMUX_GET_POSITION:
 319         {
 320             pf = (double*) va_arg( args, double* );
 321
 322             if( p_sys->i_title_blocks > 0 )
 323                 *pf = (double)p_sys->i_title_offset / p_sys->i_title_blocks;
 324             else
 325                 *pf = 0.0;
 326
 327             return VLC_SUCCESS;
 328         }
 329         case DEMUX_SET_POSITION:
 330         {
 331             f = (double)va_arg( args, double );
 332
 333             DvdReadSeek( p_demux, f * p_sys->i_title_blocks );
 334
 335             return VLC_SUCCESS;
 336         }
 337         case DEMUX_GET_TIME:
 338             pi64 = (int64_t*)va_arg( args, int64_t * );
 339             if( p_sys->i_mux_rate > 0 )
 340             {
 341                 *pi64 = (int64_t)1000000 * DVD_VIDEO_LB_LEN *
 342                         p_sys->i_title_offset / 50 / p_sys->i_mux_rate;
 343                 return VLC_SUCCESS;
 344             }
 345             *pi64 = 0;
 346             return VLC_EGENERIC;
 347
 348         case DEMUX_GET_LENGTH:
 349             pi64 = (int64_t*)va_arg( args, int64_t * );
 350             if( p_sys->i_mux_rate > 0 )
 351             {
 352                 *pi64 = (int64_t)1000000 * DVD_VIDEO_LB_LEN *
 353                         p_sys->i_title_blocks / 50 / p_sys->i_mux_rate;
 354                 return VLC_SUCCESS;
 355             }
 356             *pi64 = 0;
 357             return VLC_EGENERIC;
 358
 359         /* Special for access_demux */
 360         case DEMUX_CAN_PAUSE:
 361         case DEMUX_CAN_CONTROL_PACE:
 362             /* TODO */
 363             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
 364             *pb = VLC_TRUE;
 365             return VLC_SUCCESS;
 366
 367         case DEMUX_SET_PAUSE_STATE:
 368             return VLC_SUCCESS;
 369
 370         case DEMUX_GET_TITLE_INFO:
 371             ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 372             pi_int    = (int*)va_arg( args, int* );
 373             *((int*)va_arg( args, int* )) = 1; /* Title offset */
 374             *((int*)va_arg( args, int* )) = 1; /* Chapter offset */
 375
 376             /* Duplicate title infos */
 377             *pi_int = p_sys->i_titles;
 378             *ppp_title = malloc( sizeof(input_title_t **) * p_sys->i_titles );
 379             for( i = 0; i < p_sys->i_titles; i++ )
 380             {
 381                 (*ppp_title)[i] = vlc_input_title_Duplicate(p_sys->titles[i]);
 382             }
 383             return VLC_SUCCESS;
 384
 385         case DEMUX_SET_TITLE:
 386             i = (int)va_arg( args, int );
 387             if( DvdReadSetArea( p_demux, i, 0, -1 ) != VLC_SUCCESS )
 388             {
 389                 msg_Warn( p_demux, "cannot set title/chapter" );
 390                 return VLC_EGENERIC;
 391             }
 392             p_demux->info.i_update |=
 393                 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT;
 394             p_demux->info.i_title = i;
 395             p_demux->info.i_seekpoint = 0;
 396             return VLC_SUCCESS;
 397
 398         case DEMUX_SET_SEEKPOINT:
 399             i = (int)va_arg( args, int );
 400             if( DvdReadSetArea( p_demux, -1, i, -1 ) != VLC_SUCCESS )
 401             {
 402                 msg_Warn( p_demux, "cannot set title/chapter" );
 403                 return VLC_EGENERIC;
 404             }
 405             p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 406             p_demux->info.i_seekpoint = i;
 407             return VLC_SUCCESS;
 408
 409         case DEMUX_GET_PTS_DELAY:
 410             pi64 = (int64_t*)va_arg( args, int64_t * );
 411             *pi64 = (int64_t)var_GetInteger( p_demux, "dvdread-caching" )*1000;
 412             return VLC_SUCCESS;
 413
 414         /* TODO implement others */
 415         default:
 416             return VLC_EGENERIC;
 417     }
 418 }
 419
 420 /*****************************************************************************
 421  * Demux:
 422  *****************************************************************************/
 423 static int Demux( demux_t *p_demux )
 424 {
 425     demux_sys_t *p_sys = p_demux->p_sys;
 426
 427     uint8_t p_buffer[DVD_VIDEO_LB_LEN * DVD_BLOCK_READ_ONCE];
 428     int i_blocks_once, i_read;
 429     int i;
 430
 431     /*
 432      * Playback by cell in this pgc, starting at the cell for our chapter.
 433      */
 434
 435     /*
 436      * Check end of pack, and select the following one
 437      */
 438     if( !p_sys->i_pack_len )
 439     {
 440         /* Read NAV packet */
 441         if( DVDReadBlocks( p_sys->p_title, p_sys->i_next_vobu,
 442                            1, p_buffer ) != 1 )
 443         {
 444             msg_Err( p_demux, "read failed for block %d", p_sys->i_next_vobu );
 445             return -1;
 446         }
 447
 448         /* Basic check to be sure we don't have a empty title
 449          * go to next title if so */
 450         //assert( p_buffer[41] == 0xbf && p_buffer[1027] == 0xbf );
 451
 452         /* Parse the contained dsi packet */
 453         DvdReadHandleDSI( p_demux, p_buffer );
 454
 455         /* End of title */
 456         if( p_sys->i_next_vobu > p_sys->i_title_end_block )
 457         {
 458             if( p_sys->i_title + 1 >= p_sys->i_titles )
 459             {
 460                 return 0; /* EOF */
 461             }
 462
 463             DvdReadSetArea( p_demux, p_sys->i_title + 1, 0, -1 );
 464         }
 465
 466         if( p_sys->i_pack_len >= 1024 )
 467         {
 468             msg_Err( p_demux, "i_pack_len >= 1024 (%i). "
 469                      "This shouldn't happen!", p_sys->i_pack_len );
 470             return 0; /* EOF */
 471         }
 472
 473         /* FIXME: Ugly kludge: we send the pack block to the input for it
 474          * sometimes has a zero scr and restart the sync */
 475         p_sys->i_cur_block++;
 476         p_sys->i_title_offset++;
 477
 478         DemuxBlock( p_demux, p_buffer, DVD_VIDEO_LB_LEN );
 479     }
 480
 481     if( p_sys->i_cur_block > p_sys->i_title_end_block )
 482     {
 483         if( p_sys->i_title + 1 >= p_sys->i_titles )
 484         {
 485             return 0; /* EOF */
 486         }
 487
 488         DvdReadSetArea( p_demux, p_sys->i_title + 1, 0, -1 );
 489     }
 490
 491     /*
 492      * Read actual data
 493      */
 494     i_blocks_once = __MIN( p_sys->i_pack_len, DVD_BLOCK_READ_ONCE );
 495     p_sys->i_pack_len -= i_blocks_once;
 496
 497     /* Reads from DVD */
 498     i_read = DVDReadBlocks( p_sys->p_title, p_sys->i_cur_block,
 499                             i_blocks_once, p_buffer );
 500     if( i_read != i_blocks_once )
 501     {
 502         msg_Err( p_demux, "read failed for %d/%d blocks at 0x%02x",
 503                  i_read, i_blocks_once, p_sys->i_cur_block );
 504         return -1;
 505     }
 506
 507     p_sys->i_cur_block += i_read;
 508     p_sys->i_title_offset += i_read;
 509
 510 #if 0
 511     msg_Dbg( p_demux, "i_blocks: %d len: %d current: 0x%02x",
 512              i_read, p_sys->i_pack_len, p_sys->i_cur_block );
 513 #endif
 514
 515     for( i = 0; i < i_read; i++ )
 516     {
 517         DemuxBlock( p_demux, p_buffer + i * DVD_VIDEO_LB_LEN,
 518                     DVD_VIDEO_LB_LEN );
 519     }
 520
 521 #undef p_pgc
 522
 523     return 1;
 524 }
 525
 526 /*****************************************************************************
 527  * DemuxBlock: demux a given block
 528  *****************************************************************************/
 529 static int DemuxBlock( demux_t *p_demux, uint8_t *pkt, int i_pkt )
 530 {
 531     demux_sys_t *p_sys = p_demux->p_sys;
 532     uint8_t     *p = pkt;
 533
 534     while( p < &pkt[i_pkt] )
 535     {
 536         int i_size = ps_pkt_size( p, &pkt[i_pkt] - p );
 537         block_t *p_pkt;
 538         if( i_size <= 0 )
 539         {
 540             break;
 541         }
 542
 543         /* Create a block */
 544         p_pkt = block_New( p_demux, i_size );
 545         memcpy( p_pkt->p_buffer, p, i_size);
 546
 547         /* Parse it and send it */
 548         switch( 0x100 | p[3] )
 549         {
 550         case 0x1b9:
 551         case 0x1bb:
 552         case 0x1bc:
 553
 554 #ifdef DVDREAD_DEBUG
 555             if( p[3] == 0xbc )
 556             {
 557                 msg_Warn( p_demux, "received a PSM packet" );
 558             }
 559             else if( p[3] == 0xbb )
 560             {
 561                 msg_Warn( p_demux, "received a SYSTEM packet" );
 562             }
 563 #endif
 564             block_Release( p_pkt );
 565             break;
 566
 567         case 0x1ba:
 568         {
 569             int64_t i_scr;
 570             int i_mux_rate;
 571             if( !ps_pkt_parse_pack( p_pkt, &i_scr, &i_mux_rate ) )
 572             {
 573                 es_out_Control( p_demux->out, ES_OUT_SET_PCR, i_scr );
 574                 if( i_mux_rate > 0 ) p_sys->i_mux_rate = i_mux_rate;
 575             }
 576             block_Release( p_pkt );
 577             break;
 578         }
 579         default:
 580         {
 581             int i_id = ps_pkt_id( p_pkt );
 582             if( i_id >= 0xc0 )
 583             {
 584                 ps_track_t *tk = &p_sys->tk[PS_ID_TO_TK(i_id)];
 585
 586                 if( !tk->b_seen )
 587                 {
 588                     ESNew( p_demux, i_id, 0 );
 589                 }
 590                 if( tk->b_seen && tk->es &&
 591                     !ps_pkt_parse_pes( p_pkt, tk->i_skip ) )
 592                 {
 593                     es_out_Send( p_demux->out, tk->es, p_pkt );
 594                 }
 595                 else
 596                 {
 597                     block_Release( p_pkt );
 598                 }
 599             }
 600             else
 601             {
 602                 block_Release( p_pkt );
 603             }
 604             break;
 605         }
 606         }
 607
 608         p += i_size;
 609     }
 610
 611     return VLC_SUCCESS;
 612 }
 613
 614 /*****************************************************************************
 615  * ESNew: register a new elementary stream
 616  *****************************************************************************/
 617 static void ESNew( demux_t *p_demux, int i_id, int i_lang )
 618 {
 619     demux_sys_t *p_sys = p_demux->p_sys;
 620     ps_track_t  *tk = &p_sys->tk[PS_ID_TO_TK(i_id)];
 621     char psz_language[3];
 622
 623     if( tk->b_seen ) return;
 624
 625     if( ps_track_fill( tk, 0, i_id ) )
 626     {
 627         msg_Warn( p_demux, "unknown codec for id=0x%x", i_id );
 628         return;
 629     }
 630
 631     psz_language[0] = psz_language[1] = psz_language[2] = 0;
 632     if( i_lang && i_lang != 0xffff )
 633     {
 634         psz_language[0] = (i_lang >> 8)&0xff;
 635         psz_language[1] = (i_lang     )&0xff;
 636     }
 637
 638     /* Add a new ES */
 639     if( tk->fmt.i_cat == VIDEO_ES )
 640     {
 641         if( p_sys->i_aspect >= 0 )
 642         {
 643             tk->fmt.video.i_aspect = p_sys->i_aspect;
 644         }
 645     }
 646     else if( tk->fmt.i_cat == AUDIO_ES )
 647     {
 648         int i_audio = -1;
 649         /* find the audio number PLEASE find another way */
 650         if( (i_id&0xbdf8) == 0xbd88 )       /* dts */
 651         {
 652             i_audio = i_id&0x07;
 653         }
 654         else if( (i_id&0xbdf0) == 0xbd80 )  /* a52 */
 655         {
 656             i_audio = i_id&0xf;
 657         }
 658         else if( (i_id&0xbdf0) == 0xbda0 )  /* lpcm */
 659         {
 660             i_audio = i_id&0x1f;
 661         }
 662         else if( ( i_id&0xe0 ) == 0xc0 )    /* mpga */
 663         {
 664             i_audio = i_id&0x1f;
 665         }
 666
 667         if( psz_language[0] ) tk->fmt.psz_language = strdup( psz_language );
 668     }
 669     else if( tk->fmt.i_cat == SPU_ES )
 670     {
 671         /* Palette */
 672         tk->fmt.subs.spu.palette[0] = 0xBeef;
 673         memcpy( &tk->fmt.subs.spu.palette[1], p_sys->clut,
 674                 16 * sizeof( uint32_t ) );
 675
 676         if( psz_language[0] ) tk->fmt.psz_language = strdup( psz_language );
 677     }
 678
 679     tk->es = es_out_Add( p_demux->out, &tk->fmt );
 680     tk->b_seen = VLC_TRUE;
 681 }
 682
 683 /*****************************************************************************
 684  * DvdReadSetArea: initialize input data for title x, chapter y.
 685  * It should be called for each user navigation request.
 686  *****************************************************************************
 687  * Take care that i_title and i_chapter start from 0.
 688  *****************************************************************************/
 689 static int DvdReadSetArea( demux_t *p_demux, int i_title, int i_chapter,
 690                            int i_angle )
 691 {
 692     demux_sys_t *p_sys = p_demux->p_sys;
 693     int pgc_id = 0, pgn = 0;
 694     int i;
 695
 696 #define p_pgc p_sys->p_cur_pgc
 697 #define p_vmg p_sys->p_vmg_file
 698 #define p_vts p_sys->p_vts_file
 699
 700     if( i_title >= 0 && i_title < p_sys->i_titles &&
 701         i_title != p_sys->i_title )
 702     {
 703         int i_start_cell, i_end_cell;
 704
 705         if( p_sys->p_title != NULL ) DVDCloseFile( p_sys->p_title );
 706         if( p_vts != NULL ) ifoClose( p_vts );
 707         p_sys->i_title = i_title;
 708
 709         /*
 710          *  We have to load all title information
 711          */
 712         msg_Dbg( p_demux, "open VTS %d, for title %d",
 713                  p_vmg->tt_srpt->title[i_title].title_set_nr, i_title + 1 );
 714
 715         /* Ifo vts */
 716         if( !( p_vts = ifoOpen( p_sys->p_dvdread,
 717                p_vmg->tt_srpt->title[i_title].title_set_nr ) ) )
 718         {
 719             msg_Err( p_demux, "fatal error in vts ifo" );
 720             return VLC_EGENERIC;
 721         }
 722
 723         /* Title position inside the selected vts */
 724         p_sys->i_ttn = p_vmg->tt_srpt->title[i_title].vts_ttn;
 725
 726         /* Find title start/end */
 727         pgc_id = p_vts->vts_ptt_srpt->title[p_sys->i_ttn - 1].ptt[0].pgcn;
 728         pgn = p_vts->vts_ptt_srpt->title[p_sys->i_ttn - 1].ptt[0].pgn;
 729         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
 730
 731         p_sys->i_title_start_cell =
 732             i_start_cell = p_pgc->program_map[pgn - 1] - 1;
 733         p_sys->i_title_start_block =
 734             p_pgc->cell_playback[i_start_cell].first_sector;
 735
 736         p_sys->i_title_end_cell =
 737             i_end_cell = p_pgc->nr_of_cells - 1;
 738         p_sys->i_title_end_block =
 739             p_pgc->cell_playback[i_end_cell].last_sector;
 740
 741         p_sys->i_title_offset = 0;
 742
 743         p_sys->i_title_blocks = 0;
 744         for( i = i_start_cell; i <= i_end_cell; i++ )
 745         {
 746             p_sys->i_title_blocks += p_pgc->cell_playback[i].last_sector -
 747                 p_pgc->cell_playback[i].first_sector + 1;
 748         }
 749
 750         msg_Dbg( p_demux, "title %d vts_title %d pgc %d pgn %d "
 751                  "start %d end %d blocks: %d",
 752                  i_title + 1, p_sys->i_ttn, pgc_id, pgn,
 753                  p_sys->i_title_start_block, p_sys->i_title_end_block,
 754                  p_sys->i_title_blocks );
 755
 756         /*
 757          * Set properties for current chapter
 758          */
 759         p_sys->i_chapter = 0;
 760         p_sys->i_chapters =
 761             p_vts->vts_ptt_srpt->title[p_sys->i_ttn - 1].nr_of_ptts;
 762
 763         pgc_id = p_vts->vts_ptt_srpt->title[
 764                     p_sys->i_ttn - 1].ptt[p_sys->i_chapter].pgcn;
 765         pgn = p_vts->vts_ptt_srpt->title[
 766                     p_sys->i_ttn - 1].ptt[p_sys->i_chapter].pgn;
 767
 768         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
 769         p_sys->i_pack_len = 0;
 770         p_sys->i_next_cell =
 771             p_sys->i_cur_cell = p_pgc->program_map[pgn - 1] - 1;
 772         DvdReadFindCell( p_demux );
 773
 774         p_sys->i_next_vobu = p_sys->i_cur_block =
 775             p_pgc->cell_playback[p_sys->i_cur_cell].first_sector;
 776
 777         /*
 778          * Angle management
 779          */
 780         p_sys->i_angles = p_vmg->tt_srpt->title[i_title].nr_of_angles;
 781         if( p_sys->i_angle > p_sys->i_angles ) p_sys->i_angle = 1;
 782
 783         /*
 784          * We've got enough info, time to open the title set data.
 785          */
 786         if( !( p_sys->p_title = DVDOpenFile( p_sys->p_dvdread,
 787             p_vmg->tt_srpt->title[i_title].title_set_nr,
 788             DVD_READ_TITLE_VOBS ) ) )
 789         {
 790             msg_Err( p_demux, "cannot open title (VTS_%02d_1.VOB)",
 791                      p_vmg->tt_srpt->title[i_title].title_set_nr );
 792             return VLC_EGENERIC;
 793         }
 794
 795         //IfoPrintTitle( p_demux );
 796
 797         /*
 798          * Destroy obsolete ES by reinitializing program 0
 799          * and find all ES in title with ifo data
 800          */
 801         es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 802
 803         for( i = 0; i < PS_TK_COUNT; i++ )
 804         {
 805             ps_track_t *tk = &p_sys->tk[i];
 806             if( tk->b_seen )
 807             {
 808                 es_format_Clean( &tk->fmt );
 809                 if( tk->es ) es_out_Del( p_demux->out, tk->es );
 810             }
 811             tk->b_seen = VLC_FALSE;
 812         }
 813
 814         if( p_demux->info.i_title != i_title )
 815         {
 816             p_demux->info.i_update |=
 817                 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT;
 818             p_demux->info.i_title = i_title;
 819             p_demux->info.i_seekpoint = 0;
 820         }
 821
 822         /* TODO: re-add angles */
 823
 824
 825         ESNew( p_demux, 0xe0, 0 ); /* Video, FIXME ? */
 826         p_sys->i_aspect = p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio;
 827
 828 #define audio_control \
 829     p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->audio_control[i-1]
 830
 831         /* Audio ES, in the order they appear in the .ifo */
 832         for( i = 1; i <= p_vts->vtsi_mat->nr_of_vts_audio_streams; i++ )
 833         {
 834             int i_position = 0;
 835             uint16_t i_id;
 836
 837             //IfoPrintAudio( p_demux, i );
 838
 839             /* Audio channel is active if first byte is 0x80 */
 840             if( audio_control & 0x8000 )
 841             {
 842                 i_position = ( audio_control & 0x7F00 ) >> 8;
 843
 844                 msg_Dbg( p_demux, "audio position  %d", i_position );
 845                 switch( p_vts->vtsi_mat->vts_audio_attr[i - 1].audio_format )
 846                 {
 847                 case 0x00: /* A52 */
 848                     i_id = (0x80 + i_position) | 0xbd00;
 849                     break;
 850                 case 0x02:
 851                 case 0x03: /* MPEG audio */
 852                     i_id = 0xc000 + i_position;
 853                     break;
 854                 case 0x04: /* LPCM */
 855                     i_id = (0xa0 + i_position) | 0xbd00;
 856                     break;
 857                 case 0x06: /* DTS */
 858                     i_id = (0x88 + i_position) | 0xbd00;
 859                     break;
 860                 default:
 861                     i_id = 0;
 862                     msg_Err( p_demux, "unknown audio type %.2x",
 863                         p_vts->vtsi_mat->vts_audio_attr[i - 1].audio_format );
 864                 }
 865
 866                 ESNew( p_demux, i_id, p_sys->p_vts_file->vtsi_mat->
 867                        vts_audio_attr[i - 1].lang_code );
 868             }
 869         }
 870 #undef audio_control
 871
 872 #define spu_palette \
 873     p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->palette
 874
 875         memcpy( p_sys->clut, spu_palette, 16 * sizeof( uint32_t ) );
 876
 877 #define spu_control \
 878     p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->subp_control[i-1]
 879
 880         /* Sub Picture ES */
 881         for( i = 1; i <= p_vts->vtsi_mat->nr_of_vts_subp_streams; i++ )
 882         {
 883             int i_position = 0;
 884             uint16_t i_id;
 885
 886             //IfoPrintSpu( p_sys, i );
 887             msg_Dbg( p_demux, "spu %d 0x%02x", i, spu_control );
 888
 889             if( spu_control & 0x80000000 )
 890             {
 891                 /*  there are several streams for one spu */
 892                 if( p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
 893                 {
 894                     /* 16:9 */
 895                     switch( p_vts->vtsi_mat->vts_video_attr.permitted_df )
 896                     {
 897                     case 1: /* letterbox */
 898                         i_position = spu_control & 0xff;
 899                         break;
 900                     case 2: /* pan&scan */
 901                         i_position = ( spu_control >> 8 ) & 0xff;
 902                         break;
 903                     default: /* widescreen */
 904                         i_position = ( spu_control >> 16 ) & 0xff;
 905                         break;
 906                     }
 907                 }
 908                 else
 909                 {
 910                     /* 4:3 */
 911                     i_position = ( spu_control >> 24 ) & 0x7F;
 912                 }
 913
 914                 i_id = (0x20 + i_position) | 0xbd00;
 915
 916                 ESNew( p_demux, i_id, p_sys->p_vts_file->vtsi_mat->
 917                        vts_subp_attr[i - 1].lang_code );
 918             }
 919         }
 920 #undef spu_control
 921
 922     }
 923     else if( i_title != -1 && i_title != p_sys->i_title )
 924
 925     {
 926         return VLC_EGENERIC; /* Couldn't set title */
 927     }
 928
 929     /*
 930      * Chapter selection
 931      */
 932
 933     if( i_chapter >= 0 && i_chapter < p_sys->i_chapters )
 934     {
 935         pgc_id = p_vts->vts_ptt_srpt->title[
 936                      p_sys->i_ttn - 1].ptt[i_chapter].pgcn;
 937         pgn = p_vts->vts_ptt_srpt->title[
 938                   p_sys->i_ttn - 1].ptt[i_chapter].pgn;
 939
 940         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
 941
 942         p_sys->i_cur_cell = p_pgc->program_map[pgn - 1] - 1;
 943         p_sys->i_chapter = i_chapter;
 944         DvdReadFindCell( p_demux );
 945
 946         p_sys->i_title_offset = 0;
 947         for( i = p_sys->i_title_start_cell; i < p_sys->i_cur_cell; i++ )
 948         {
 949             p_sys->i_title_offset += p_pgc->cell_playback[i].last_sector -
 950                 p_pgc->cell_playback[i].first_sector + 1;
 951         }
 952
 953         p_sys->i_pack_len = 0;
 954         p_sys->i_next_vobu = p_sys->i_cur_block =
 955             p_pgc->cell_playback[p_sys->i_cur_cell].first_sector;
 956
 957         if( p_demux->info.i_seekpoint != i_chapter )
 958         {
 959             p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 960             p_demux->info.i_seekpoint = i_chapter;
 961         }
 962     }
 963     else if( i_chapter != -1 )
 964
 965     {
 966         return VLC_EGENERIC; /* Couldn't set chapter */
 967     }
 968
 969 #undef p_pgc
 970 #undef p_vts
 971 #undef p_vmg
 972
 973     return VLC_SUCCESS;
 974 }
 975
 976 /*****************************************************************************
 977  * DvdReadSeek : Goes to a given position on the stream.
 978  *****************************************************************************
 979  * This one is used by the input and translate chronological position from
 980  * input to logical position on the device.
 981  *****************************************************************************/
 982 static void DvdReadSeek( demux_t *p_demux, int i_block_offset )
 983 {
 984     demux_sys_t *p_sys = p_demux->p_sys;
 985     int i_chapter = 0;
 986     int i_cell = 0;
 987     int i_vobu = 0;
 988     int i_sub_cell = 0;
 989     int i_block;
 990
 991 #define p_pgc p_sys->p_cur_pgc
 992 #define p_vts p_sys->p_vts_file
 993
 994     /* Find cell */
 995     i_block = i_block_offset;
 996     for( i_cell = p_sys->i_title_start_cell;
 997          i_cell <= p_sys->i_title_end_cell; i_cell++ )
 998     {
 999         if( i_block < (int)p_pgc->cell_playback[i_cell].last_sector -
1000             (int)p_pgc->cell_playback[i_cell].first_sector + 1 ) break;
1001
1002         i_block -= (p_pgc->cell_playback[i_cell].last_sector -
1003             p_pgc->cell_playback[i_cell].first_sector + 1);
1004     }
1005     if( i_cell > p_sys->i_title_end_cell )
1006     {
1007         msg_Err( p_demux, "couldn't find cell for block %i", i_block_offset );
1008         return;
1009     }
1010     i_block += p_pgc->cell_playback[i_cell].first_sector;
1011     p_sys->i_title_offset = i_block_offset;
1012
1013     /* Find chapter */
1014     for( i_chapter = 0; i_chapter < p_sys->i_chapters; i_chapter++ )
1015     {
1016         int pgc_id, pgn, i_tmp;
1017
1018         pgc_id = p_vts->vts_ptt_srpt->title[
1019                     p_sys->i_ttn - 1].ptt[i_chapter].pgcn;
1020         pgn = p_vts->vts_ptt_srpt->title[
1021                     p_sys->i_ttn - 1].ptt[i_chapter].pgn;
1022
1023         i_tmp = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc->program_map[pgn-1];
1024
1025         if( i_tmp > i_cell ) break;
1026     }
1027
1028     if( i_chapter < p_sys->i_chapters &&
1029         p_demux->info.i_seekpoint != i_chapter )
1030     {
1031         p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
1032         p_demux->info.i_seekpoint = i_chapter;
1033     }
1034
1035     /* Find vobu */
1036     while( (int)p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu] <= i_block )
1037     {
1038         i_vobu++;
1039     }
1040
1041     /* Find sub_cell */
1042     while( p_vts->vts_c_adt->cell_adr_table[i_sub_cell].start_sector <
1043            p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu-1] )
1044     {
1045         i_sub_cell++;
1046     }
1047
1048 #if 1
1049     msg_Dbg( p_demux, "cell %d i_sub_cell %d chapter %d vobu %d "
1050              "cell_sector %d vobu_sector %d sub_cell_sector %d",
1051              i_cell, i_sub_cell, i_chapter, i_vobu,
1052              p_sys->p_cur_pgc->cell_playback[i_cell].first_sector,
1053              p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu],
1054              p_vts->vts_c_adt->cell_adr_table[i_sub_cell - 1].start_sector);
1055 #endif
1056
1057     p_sys->i_cur_block = i_block;
1058     p_sys->i_next_vobu = p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu];
1059     p_sys->i_pack_len = p_sys->i_next_vobu - i_block;
1060     p_sys->i_cur_cell = i_cell;
1061     p_sys->i_chapter = i_chapter;
1062     DvdReadFindCell( p_demux );
1063
1064 #undef p_vts
1065 #undef p_pgc
1066
1067     return;
1068 }
1069
1070 /*****************************************************************************
1071  * DvdReadHandleDSI
1072  *****************************************************************************/
1073 static void DvdReadHandleDSI( demux_t *p_demux, uint8_t *p_data )
1074 {
1075     demux_sys_t *p_sys = p_demux->p_sys;
1076
1077     navRead_DSI( &p_sys->dsi_pack, &p_data[DSI_START_BYTE] );
1078
1079     /*
1080      * Determine where we go next.  These values are the ones we mostly
1081      * care about.
1082      */
1083     p_sys->i_cur_block = p_sys->dsi_pack.dsi_gi.nv_pck_lbn;
1084     p_sys->i_pack_len = p_sys->dsi_pack.dsi_gi.vobu_ea;
1085
1086     /*
1087      * If we're not at the end of this cell, we can determine the next
1088      * VOBU to display using the VOBU_SRI information section of the
1089      * DSI.  Using this value correctly follows the current angle,
1090      * avoiding the doubled scenes in The Matrix, and makes our life
1091      * really happy.
1092      */
1093
1094     p_sys->i_next_vobu = p_sys->i_cur_block +
1095         ( p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1096
1097     if( p_sys->dsi_pack.vobu_sri.next_vobu != SRI_END_OF_CELL
1098         && p_sys->i_angle > 1 )
1099     {
1100         switch( ( p_sys->dsi_pack.sml_pbi.category & 0xf000 ) >> 12 )
1101         {
1102         case 0x4:
1103             /* Interleaved unit with no angle */
1104             if( p_sys->dsi_pack.sml_pbi.ilvu_sa != 0 )
1105             {
1106                 p_sys->i_next_vobu = p_sys->i_cur_block +
1107                     p_sys->dsi_pack.sml_pbi.ilvu_sa;
1108                 p_sys->i_pack_len = p_sys->dsi_pack.sml_pbi.ilvu_ea;
1109             }
1110             else
1111             {
1112                 p_sys->i_next_vobu = p_sys->i_cur_block +
1113                     p_sys->dsi_pack.dsi_gi.vobu_ea + 1;
1114             }
1115             break;
1116         case 0x5:
1117             /* vobu is end of ilvu */
1118             if( p_sys->dsi_pack.sml_agli.data[p_sys->i_angle-1].address )
1119             {
1120                 p_sys->i_next_vobu = p_sys->i_cur_block +
1121                     p_sys->dsi_pack.sml_agli.data[p_sys->i_angle-1].address;
1122                 p_sys->i_pack_len = p_sys->dsi_pack.sml_pbi.ilvu_ea;
1123
1124                 break;
1125             }
1126         case 0x6:
1127             /* vobu is beginning of ilvu */
1128         case 0x9:
1129             /* next scr is 0 */
1130         case 0xa:
1131             /* entering interleaved section */
1132         case 0x8:
1133             /* non interleaved cells in interleaved section */
1134         default:
1135             p_sys->i_next_vobu = p_sys->i_cur_block +
1136                 ( p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1137             break;
1138         }
1139     }
1140     else if( p_sys->dsi_pack.vobu_sri.next_vobu == SRI_END_OF_CELL )
1141     {
1142         p_sys->i_cur_cell = p_sys->i_next_cell;
1143         DvdReadFindCell( p_demux );
1144
1145         p_sys->i_next_vobu =
1146             p_sys->p_cur_pgc->cell_playback[p_sys->i_cur_cell].first_sector;
1147     }
1148
1149 #if 0
1150     msg_Dbg( p_demux, 12, "scr %d lbn 0x%02x vobu_ea %d vob_id %d c_id %d",
1151              p_sys->dsi_pack.dsi_gi.nv_pck_scr,
1152              p_sys->dsi_pack.dsi_gi.nv_pck_lbn,
1153              p_sys->dsi_pack.dsi_gi.vobu_ea,
1154              p_sys->dsi_pack.dsi_gi.vobu_vob_idn,
1155              p_sys->dsi_pack.dsi_gi.vobu_c_idn );
1156
1157     msg_Dbg( p_demux, 12, "cat 0x%02x ilvu_ea %d ilvu_sa %d size %d",
1158              p_sys->dsi_pack.sml_pbi.category,
1159              p_sys->dsi_pack.sml_pbi.ilvu_ea,
1160              p_sys->dsi_pack.sml_pbi.ilvu_sa,
1161              p_sys->dsi_pack.sml_pbi.size );
1162
1163     msg_Dbg( p_demux, 12, "next_vobu %d next_ilvu1 %d next_ilvu2 %d",
1164              p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff,
1165              p_sys->dsi_pack.sml_agli.data[ p_sys->i_angle - 1 ].address,
1166              p_sys->dsi_pack.sml_agli.data[ p_sys->i_angle ].address);
1167 #endif
1168 }
1169
1170 /*****************************************************************************
1171  * DvdReadFindCell
1172  *****************************************************************************/
1173 static void DvdReadFindCell( demux_t *p_demux )
1174 {
1175     demux_sys_t *p_sys = p_demux->p_sys;
1176
1177     pgc_t *p_pgc;
1178     int   pgc_id, pgn;
1179     int   i = 0;
1180
1181 #define cell p_sys->p_cur_pgc->cell_playback
1182
1183     if( cell[p_sys->i_cur_cell].block_type == BLOCK_TYPE_ANGLE_BLOCK )
1184     {
1185         p_sys->i_cur_cell += p_sys->i_angle - 1;
1186
1187         while( cell[p_sys->i_cur_cell+i].block_mode != BLOCK_MODE_LAST_CELL )
1188         {
1189             i++;
1190         }
1191         p_sys->i_next_cell = p_sys->i_cur_cell + i + 1;
1192     }
1193     else
1194     {
1195         p_sys->i_next_cell = p_sys->i_cur_cell + 1;
1196     }
1197
1198 #undef cell
1199
1200     if( p_sys->i_chapter + 1 >= p_sys->i_chapters ) return;
1201
1202     pgc_id = p_sys->p_vts_file->vts_ptt_srpt->title[
1203                 p_sys->i_ttn - 1].ptt[p_sys->i_chapter + 1].pgcn;
1204     pgn = p_sys->p_vts_file->vts_ptt_srpt->title[
1205               p_sys->i_ttn - 1].ptt[p_sys->i_chapter + 1].pgn;
1206     p_pgc = p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
1207
1208     if( p_sys->i_cur_cell >= p_pgc->program_map[pgn - 1] - 1 )
1209     {
1210         p_sys->i_chapter++;
1211
1212         if( p_sys->i_chapter < p_sys->i_chapters &&
1213             p_demux->info.i_seekpoint != p_sys->i_chapter )
1214         {
1215             p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
1216             p_demux->info.i_seekpoint = p_sys->i_chapter;
1217         }
1218     }
1219 }
1220
1221 /*****************************************************************************
1222  * DemuxTitles: get the titles/chapters structure
1223  *****************************************************************************/
1224 static void DemuxTitles( demux_t *p_demux, int *pi_angle )
1225 {
1226     demux_sys_t *p_sys = p_demux->p_sys;
1227     input_title_t *t;
1228     seekpoint_t *s;
1229     int32_t i_titles;
1230     int i;
1231
1232     /* Find out number of titles/chapters */
1233 #define tt_srpt p_sys->p_vmg_file->tt_srpt
1234
1235     i_titles = tt_srpt->nr_of_srpts;
1236     msg_Dbg( p_demux, "number of titles: %d", i_titles );
1237
1238     for( i = 0; i < i_titles; i++ )
1239     {
1240         int32_t i_chapters = 0;
1241         int j;
1242
1243         i_chapters = tt_srpt->title[i].nr_of_ptts;
1244         msg_Dbg( p_demux, "title %d has %d chapters", i, i_chapters );
1245
1246         t = vlc_input_title_New();
1247
1248         for( j = 0; j < __MAX( i_chapters, 1 ); j++ )
1249         {
1250             s = vlc_seekpoint_New();
1251             TAB_APPEND( t->i_seekpoint, t->seekpoint, s );
1252         }
1253
1254         TAB_APPEND( p_sys->i_titles, p_sys->titles, t );
1255     }
1256
1257 #undef tt_srpt
1258 }