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 CACHING_TEXT N_("caching value in ms")
  58 #define CACHING_LONGTEXT N_( \
  59     "Allows you to modify the default caching value for DVDread streams. " \
  60     "This value should be set in millisecond units." )
  61
  62 #define CSSMETHOD_TEXT N_("Method used by libdvdcss for decryption")
  63 #define CSSMETHOD_LONGTEXT N_( \
  64     "Set the method used by libdvdcss for key decryption.\n" \
  65     "title: decrypted title key is guessed from the encrypted sectors of " \
  66            "the stream. Thus it should work with a file as well as the " \
  67            "DVD device. But it sometimes takes much time to decrypt a title " \
  68            "key and may even fail. With this method, the key is only checked "\
  69            "at the beginning of each title, so it won't work if the key " \
  70            "changes in the middle of a title.\n" \
  71     "disc: the disc key is first cracked, then all title keys can be " \
  72            "decrypted instantly, which allows us to check them often.\n" \
  73     "key: the same as \"disc\" if you don't have a file with player keys " \
  74            "at compilation time. If you do, the decryption of the disc key " \
  75            "will be faster with this method. It is the one that was used by " \
  76            "libcss.\n" \
  77     "The default method is: key.")
  78
  79 static char *psz_css_list[] = { "title", "disc", "key" };
  80 static char *psz_css_list_text[] = { N_("title"), N_("Disc"), N_("Key") };
  81
  82 static int  Open ( vlc_object_t * );
  83 static void Close( vlc_object_t * );
  84
  85 vlc_module_begin();
  86     set_description( _("DVDRead Input") );
  87     add_integer( "dvdread-caching", DEFAULT_PTS_DELAY / 1000, NULL,
  88         CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
  89     add_string( "dvdread-css-method", NULL, NULL, CSSMETHOD_TEXT,
  90                 CSSMETHOD_LONGTEXT, VLC_TRUE );
  91         change_string_list( psz_css_list, psz_css_list_text, 0 );
  92     set_capability( "access_demux", 0 );
  93     //add_shortcut( "dvd" );
  94     add_shortcut( "dvdread" );
  95     add_shortcut( "dvdsimple" );
  96     set_callbacks( Open, Close );
  97 vlc_module_end();
  98
  99 /* how many blocks DVDRead will read in each loop */
 100 #define DVD_BLOCK_READ_ONCE 4
 101
 102 /*****************************************************************************
 103  * Local prototypes
 104  *****************************************************************************/
 105
 106 struct demux_sys_t
 107 {
 108     /* DVDRead state */
 109     dvd_reader_t *p_dvdread;
 110     dvd_file_t   *p_title;
 111
 112     ifo_handle_t *p_vmg_file;
 113     ifo_handle_t *p_vts_file;
 114
 115     int i_title;
 116     int i_chapter, i_chapters;
 117     int i_angle, i_angles;
 118
 119     tt_srpt_t    *p_tt_srpt;
 120     pgc_t        *p_cur_pgc;
 121
 122     dsi_t        dsi_pack;
 123
 124     int          i_ttn;
 125
 126     int i_pack_len;
 127     int i_cur_block;
 128     int i_next_vobu;
 129
 130     /* Current title start/end blocks */
 131     int i_title_start_block;
 132     int i_title_end_block;
 133     int i_title_blocks;
 134     int i_title_offset;
 135
 136     int i_title_start_cell;
 137     int i_title_end_cell;
 138     int i_cur_cell;
 139     int i_next_cell;
 140
 141     /* track */
 142     ps_track_t  tk[PS_TK_COUNT];
 143
 144     /* for spu variables */
 145     input_thread_t *p_input;
 146
 147     /* FIXME */
 148     uint8_t     alpha[4];
 149     uint32_t    clut[16];
 150
 151     /* */
 152     int i_aspect;
 153
 154     int           i_titles;
 155     input_title_t **titles;
 156 };
 157
 158 static char *ParseCL( vlc_object_t *, char *, vlc_bool_t, int *, int *, int *);
 159
 160 static int Control   ( demux_t *, int, va_list );
 161 static int Demux     ( demux_t * );
 162 static int DemuxBlock( demux_t *, uint8_t *, int );
 163
 164 enum
 165 {
 166     AR_SQUARE_PICTURE = 1,                          /* square pixels */
 167     AR_3_4_PICTURE    = 2,                       /* 3:4 picture (TV) */
 168     AR_16_9_PICTURE   = 3,             /* 16:9 picture (wide screen) */
 169     AR_221_1_PICTURE  = 4,                 /* 2.21:1 picture (movie) */
 170 };
 171
 172 static void DemuxTitles( demux_t *, int *, int *, int * );
 173 static void ESNew( demux_t *, int, int );
 174
 175 static int  DvdReadSetArea  ( demux_t *, int, int, int );
 176 static void DvdReadSeek     ( demux_t *, int );
 177 static void DvdReadHandleDSI( demux_t *, uint8_t * );
 178 static void DvdReadFindCell ( demux_t * );
 179
 180 /*****************************************************************************
 181  * Open:
 182  *****************************************************************************/
 183 static int Open( vlc_object_t *p_this )
 184 {
 185     demux_t      *p_demux = (demux_t*)p_this;
 186     demux_sys_t  *p_sys;
 187     int          i_title, i_chapter, i_angle;
 188     char         *psz_name;
 189     char         *psz_dvdcss_env;
 190     dvd_reader_t *p_dvdread;
 191     ifo_handle_t *p_vmg_file;
 192
 193     psz_name = ParseCL( VLC_OBJECT(p_demux), p_demux->psz_path, VLC_TRUE,
 194                         &i_title, &i_chapter, &i_angle );
 195     if( !psz_name )
 196     {
 197         return VLC_EGENERIC;
 198     }
 199
 200     /* Override environment variable DVDCSS_METHOD with config option
 201      * (FIXME: this creates a small memory leak) */
 202     psz_dvdcss_env = config_GetPsz( p_demux, "dvdread-css-method" );
 203     if( psz_dvdcss_env && *psz_dvdcss_env )
 204     {
 205         char *psz_env;
 206
 207         psz_env = malloc( strlen("DVDCSS_METHOD=") +
 208                           strlen( psz_dvdcss_env ) + 1 );
 209
 210         if( !psz_env )
 211         {
 212             free( psz_dvdcss_env );
 213             return VLC_ENOMEM;
 214         }
 215
 216         sprintf( psz_env, "%s%s", "DVDCSS_METHOD=", psz_dvdcss_env );
 217
 218         putenv( psz_env );
 219     }
 220     if( psz_dvdcss_env ) free( psz_dvdcss_env );
 221
 222     /* Open dvdread */
 223     if( !(p_dvdread = DVDOpen( psz_name )) )
 224     {
 225         msg_Err( p_demux, "DVDRead cannot open source: %s", psz_name );
 226         free( psz_name );
 227         return VLC_EGENERIC;
 228     }
 229     free( psz_name );
 230
 231     /* Ifo allocation & initialisation */
 232     if( !( p_vmg_file = ifoOpen( p_dvdread, 0 ) ) )
 233     {
 234         msg_Warn( p_demux, "cannot open VMG info" );
 235         return VLC_EGENERIC;
 236     }
 237     msg_Dbg( p_demux, "VMG opened" );
 238
 239     /* Fill p_demux field */
 240     p_demux->pf_demux = Demux;
 241     p_demux->pf_control = Control;
 242     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 243     memset( p_sys, 0, sizeof( demux_sys_t ) );
 244
 245     ps_track_init( p_sys->tk );
 246     p_sys->i_aspect = -1;
 247
 248     p_sys->p_dvdread = p_dvdread;
 249     p_sys->p_vmg_file = p_vmg_file;
 250     p_sys->p_title = NULL;
 251     p_sys->p_vts_file = NULL;
 252
 253     p_sys->i_title = p_sys->i_chapter = -1;
 254     p_sys->i_angle = i_angle;
 255
 256     DemuxTitles( p_demux, &i_title, &i_chapter, &i_angle );
 257
 258     DvdReadSetArea( p_demux, i_title, i_chapter, i_angle );
 259
 260     /* Update default_pts to a suitable value for dvdread access */
 261     var_Create( p_demux, "dvdread-caching",
 262                 VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 263
 264     return VLC_SUCCESS;
 265 }
 266
 267 /*****************************************************************************
 268  * Close:
 269  *****************************************************************************/
 270 static void Close( vlc_object_t *p_this )
 271 {
 272     demux_t     *p_demux = (demux_t*)p_this;
 273     demux_sys_t *p_sys = p_demux->p_sys;
 274     int i;
 275
 276     for( i = 0; i < PS_TK_COUNT; i++ )
 277     {
 278         ps_track_t *tk = &p_sys->tk[i];
 279         if( tk->b_seen )
 280         {
 281             es_format_Clean( &tk->fmt );
 282             if( tk->es ) es_out_Del( p_demux->out, tk->es );
 283         }
 284     }
 285
 286     /* Close libdvdread */
 287     if( p_sys->p_title ) DVDCloseFile( p_sys->p_title );
 288     if( p_sys->p_vts_file ) ifoClose( p_sys->p_vts_file );
 289     if( p_sys->p_vmg_file ) ifoClose( p_sys->p_vmg_file );
 290     DVDClose( p_sys->p_dvdread );
 291
 292     free( p_sys );
 293 }
 294
 295 /*****************************************************************************
 296  * Control:
 297  *****************************************************************************/
 298 static int Control( demux_t *p_demux, int i_query, va_list args )
 299 {
 300     demux_sys_t *p_sys = p_demux->p_sys;
 301     double f, *pf;
 302     vlc_bool_t *pb;
 303     int64_t *pi64;
 304     input_title_t ***ppp_title;
 305     int *pi_int;
 306     int i;
 307
 308     switch( i_query )
 309     {
 310         case DEMUX_GET_POSITION:
 311         {
 312             pf = (double*) va_arg( args, double* );
 313
 314             if( p_sys->i_title_blocks > 0 )
 315                 *pf = (double)p_sys->i_title_offset / p_sys->i_title_blocks;
 316             else
 317                 *pf = 0.0;
 318
 319             return VLC_SUCCESS;
 320         }
 321         case DEMUX_SET_POSITION:
 322         {
 323             f = (double)va_arg( args, double );
 324
 325             DvdReadSeek( p_demux, f * p_sys->i_title_blocks );
 326
 327             return VLC_SUCCESS;
 328         }
 329
 330         /* Special for access_demux */
 331         case DEMUX_CAN_PAUSE:
 332         case DEMUX_CAN_CONTROL_PACE:
 333             /* TODO */
 334             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
 335             *pb = VLC_TRUE;
 336             return VLC_SUCCESS;
 337
 338         case DEMUX_SET_PAUSE_STATE:
 339             return VLC_SUCCESS;
 340
 341         case DEMUX_GET_TITLE_INFO:
 342             ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 343             pi_int    = (int*)va_arg( args, int* );
 344
 345             /* Duplicate title infos */
 346             *pi_int = p_sys->i_titles;
 347             *ppp_title = malloc( sizeof(input_title_t **) * p_sys->i_titles );
 348             for( i = 0; i < p_sys->i_titles; i++ )
 349             {
 350                 (*ppp_title)[i] = vlc_input_title_Duplicate(p_sys->titles[i]);
 351             }
 352             return VLC_SUCCESS;
 353
 354         case DEMUX_SET_TITLE:
 355             i = (int)va_arg( args, int );
 356             if( DvdReadSetArea( p_demux, i, 0, -1 ) != VLC_SUCCESS )
 357             {
 358                 msg_Warn( p_demux, "cannot set title/chapter" );
 359                 return VLC_EGENERIC;
 360             }
 361             p_demux->info.i_update |=
 362                 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT;
 363             p_demux->info.i_title = i;
 364             p_demux->info.i_seekpoint = 0;
 365             return VLC_SUCCESS;
 366
 367         case DEMUX_SET_SEEKPOINT:
 368             i = (int)va_arg( args, int );
 369             if( DvdReadSetArea( p_demux, -1, i, -1 ) != VLC_SUCCESS )
 370             {
 371                 msg_Warn( p_demux, "cannot set title/chapter" );
 372                 return VLC_EGENERIC;
 373             }
 374             p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 375             p_demux->info.i_seekpoint = i;
 376             return VLC_SUCCESS;
 377
 378         case DEMUX_GET_PTS_DELAY:
 379             pi64 = (int64_t*)va_arg( args, int64_t * );
 380             *pi64 = (int64_t)var_GetInteger( p_demux, "dvdread-caching" )*1000;
 381             return VLC_SUCCESS;
 382
 383         /* TODO implement others */
 384         default:
 385             return VLC_EGENERIC;
 386     }
 387 }
 388
 389 /*****************************************************************************
 390  * Demux:
 391  *****************************************************************************/
 392 static int Demux( demux_t *p_demux )
 393 {
 394     demux_sys_t *p_sys = p_demux->p_sys;
 395
 396     uint8_t p_buffer[DVD_VIDEO_LB_LEN * DVD_BLOCK_READ_ONCE];
 397     int i_blocks_once, i_read;
 398     int i;
 399
 400     /*
 401      * Playback by cell in this pgc, starting at the cell for our chapter.
 402      */
 403
 404     /*
 405      * Check end of pack, and select the following one
 406      */
 407     if( !p_sys->i_pack_len )
 408     {
 409         /* Read NAV packet */
 410         if( DVDReadBlocks( p_sys->p_title, p_sys->i_next_vobu,
 411                            1, p_buffer ) != 1 )
 412         {
 413             msg_Err( p_demux, "read failed for block %d", p_sys->i_next_vobu );
 414             return -1;
 415         }
 416
 417         /* Basic check to be sure we don't have a empty title
 418          * go to next title if so */
 419         //assert( p_buffer[41] == 0xbf && p_buffer[1027] == 0xbf );
 420
 421         /* Parse the contained dsi packet */
 422         DvdReadHandleDSI( p_demux, p_buffer );
 423
 424         /* End of title */
 425         if( p_sys->i_next_vobu > p_sys->i_title_end_block )
 426         {
 427             if( p_sys->i_title + 1 >= p_sys->i_titles ) return 0; /* EOF */
 428
 429             DvdReadSetArea( p_demux, p_sys->i_title + 1, 0, -1 );
 430         }
 431
 432         if( p_sys->i_pack_len >= 1024 )
 433         {
 434             msg_Err( p_demux, "i_pack_len >= 1024. This shouldn't happen!" );
 435             return 0; /* EOF */
 436         }
 437
 438         /* FIXME: Ugly kludge: we send the pack block to the input for it
 439          * sometimes has a zero scr and restart the sync */
 440         p_sys->i_cur_block++;
 441         p_sys->i_title_offset++;
 442
 443         DemuxBlock( p_demux, p_buffer, DVD_VIDEO_LB_LEN );
 444     }
 445
 446     if( p_sys->i_cur_block > p_sys->i_title_end_block )
 447     {
 448         if( p_sys->i_title + 1 >= p_sys->i_titles ) return 0; /* EOF */
 449
 450         DvdReadSetArea( p_demux, p_sys->i_title + 1, 0, -1 );
 451     }
 452
 453     /*
 454      * Read actual data
 455      */
 456     i_blocks_once = __MIN( p_sys->i_pack_len, DVD_BLOCK_READ_ONCE );
 457     p_sys->i_pack_len -= i_blocks_once;
 458
 459     /* Reads from DVD */
 460     i_read = DVDReadBlocks( p_sys->p_title, p_sys->i_cur_block,
 461                             i_blocks_once, p_buffer );
 462     if( i_read != i_blocks_once )
 463     {
 464         msg_Err( p_demux, "read failed for %d/%d blocks at 0x%02x",
 465                  i_read, i_blocks_once, p_sys->i_cur_block );
 466         return -1;
 467     }
 468
 469     p_sys->i_cur_block += i_read;
 470     p_sys->i_title_offset += i_read;
 471
 472 #if 0
 473     msg_Dbg( p_demux, "i_blocks: %d len: %d current: 0x%02x",
 474              i_read, p_sys->i_pack_len, p_sys->i_cur_block );
 475 #endif
 476
 477     for( i = 0; i < i_read; i++ )
 478     {
 479         DemuxBlock( p_demux, p_buffer + i * DVD_VIDEO_LB_LEN,
 480                     DVD_VIDEO_LB_LEN );
 481     }
 482
 483 #undef p_pgc
 484
 485     return 1;
 486 }
 487
 488 /*****************************************************************************
 489  * DemuxBlock: demux a given block
 490  *****************************************************************************/
 491 static int DemuxBlock( demux_t *p_demux, uint8_t *pkt, int i_pkt )
 492 {
 493     demux_sys_t *p_sys = p_demux->p_sys;
 494     uint8_t     *p = pkt;
 495
 496     while( p < &pkt[i_pkt] )
 497     {
 498         int i_size = ps_pkt_size( p, &pkt[i_pkt] - p );
 499         block_t *p_pkt;
 500         if( i_size <= 0 )
 501         {
 502             break;
 503         }
 504
 505         /* Create a block */
 506         p_pkt = block_New( p_demux, i_size );
 507         memcpy( p_pkt->p_buffer, p, i_size);
 508
 509         /* Parse it and send it */
 510         switch( 0x100 | p[3] )
 511         {
 512         case 0x1b9:
 513         case 0x1bb:
 514         case 0x1bc:
 515
 516 #ifdef DVDREAD_DEBUG
 517             if( p[3] == 0xbc )
 518             {
 519                 msg_Warn( p_demux, "received a PSM packet" );
 520             }
 521             else if( p[3] == 0xbb )
 522             {
 523                 msg_Warn( p_demux, "received a SYSTEM packet" );
 524             }
 525 #endif
 526             block_Release( p_pkt );
 527             break;
 528
 529         case 0x1ba:
 530         {
 531             int64_t i_scr;
 532             int i_mux_rate;
 533             if( !ps_pkt_parse_pack( p_pkt, &i_scr, &i_mux_rate ) )
 534             {
 535                 es_out_Control( p_demux->out, ES_OUT_SET_PCR, i_scr );
 536             }
 537             block_Release( p_pkt );
 538             break;
 539         }
 540         default:
 541         {
 542             int i_id = ps_pkt_id( p_pkt );
 543             if( i_id >= 0xc0 )
 544             {
 545                 ps_track_t *tk = &p_sys->tk[PS_ID_TO_TK(i_id)];
 546
 547                 if( !tk->b_seen )
 548                 {
 549                     ESNew( p_demux, i_id, 0 );
 550                 }
 551                 if( tk->b_seen && tk->es &&
 552                     !ps_pkt_parse_pes( p_pkt, tk->i_skip ) )
 553                 {
 554                     es_out_Send( p_demux->out, tk->es, p_pkt );
 555                 }
 556                 else
 557                 {
 558                     block_Release( p_pkt );
 559                 }
 560             }
 561             else
 562             {
 563                 block_Release( p_pkt );
 564             }
 565             break;
 566         }
 567         }
 568
 569         p += i_size;
 570     }
 571
 572     return VLC_SUCCESS;
 573 }
 574
 575 /*****************************************************************************
 576  * ESNew: register a new elementary stream
 577  *****************************************************************************/
 578 static void ESNew( demux_t *p_demux, int i_id, int i_lang )
 579 {
 580     demux_sys_t *p_sys = p_demux->p_sys;
 581     ps_track_t  *tk = &p_sys->tk[PS_ID_TO_TK(i_id)];
 582     char psz_language[3];
 583
 584     if( tk->b_seen ) return;
 585
 586     if( ps_track_fill( tk, i_id ) )
 587     {
 588         msg_Warn( p_demux, "unknown codec for id=0x%x", i_id );
 589         return;
 590     }
 591
 592     psz_language[0] = psz_language[1] = psz_language[2] = 0;
 593     if( i_lang && i_lang != 0xffff )
 594     {
 595         psz_language[0] = (i_lang >> 8)&0xff;
 596         psz_language[1] = (i_lang     )&0xff;
 597     }
 598
 599     /* Add a new ES */
 600     if( tk->fmt.i_cat == VIDEO_ES )
 601     {
 602         if( p_sys->i_aspect >= 0 )
 603         {
 604             tk->fmt.video.i_aspect = p_sys->i_aspect;
 605         }
 606     }
 607     else if( tk->fmt.i_cat == AUDIO_ES )
 608     {
 609         int i_audio = -1;
 610         /* find the audio number PLEASE find another way */
 611         if( (i_id&0xbdf8) == 0xbd88 )       /* dts */
 612         {
 613             i_audio = i_id&0x07;
 614         }
 615         else if( (i_id&0xbdf0) == 0xbd80 )  /* a52 */
 616         {
 617             i_audio = i_id&0xf;
 618         }
 619         else if( (i_id&0xbdf0) == 0xbda0 )  /* lpcm */
 620         {
 621             i_audio = i_id&0x1f;
 622         }
 623         else if( ( i_id&0xe0 ) == 0xc0 )    /* mpga */
 624         {
 625             i_audio = i_id&0x1f;
 626         }
 627
 628         if( psz_language[0] ) tk->fmt.psz_language = strdup( psz_language );
 629     }
 630     else if( tk->fmt.i_cat == SPU_ES )
 631     {
 632         /* Palette */
 633         tk->fmt.subs.spu.palette[0] = 0xBeef;
 634         memcpy( &tk->fmt.subs.spu.palette[1], p_sys->clut,
 635                 16 * sizeof( uint32_t ) );
 636
 637         if( psz_language[0] ) tk->fmt.psz_language = strdup( psz_language );
 638     }
 639
 640     tk->es = es_out_Add( p_demux->out, &tk->fmt );
 641     tk->b_seen = VLC_TRUE;
 642 }
 643
 644 /*****************************************************************************
 645  * DvdReadSetArea: initialize input data for title x, chapter y.
 646  * It should be called for each user navigation request.
 647  *****************************************************************************
 648  * Take care that i_title and i_chapter start from 0.
 649  *****************************************************************************/
 650 static int DvdReadSetArea( demux_t *p_demux, int i_title, int i_chapter,
 651                            int i_angle )
 652 {
 653     demux_sys_t *p_sys = p_demux->p_sys;
 654     int pgc_id = 0, pgn = 0;
 655     int i;
 656
 657 #define p_pgc p_sys->p_cur_pgc
 658 #define p_vmg p_sys->p_vmg_file
 659 #define p_vts p_sys->p_vts_file
 660
 661     if( i_title >= 0 && i_title < p_sys->i_titles &&
 662         i_title != p_sys->i_title )
 663     {
 664         int i_start_cell, i_end_cell;
 665
 666         if( p_sys->p_title != NULL ) DVDCloseFile( p_sys->p_title );
 667         if( p_vts != NULL ) ifoClose( p_vts );
 668         p_sys->i_title = i_title;
 669
 670         /*
 671          *  We have to load all title information
 672          */
 673         msg_Dbg( p_demux, "open VTS %d, for title %d",
 674                  p_vmg->tt_srpt->title[i_title].title_set_nr, i_title + 1 );
 675
 676         /* Ifo vts */
 677         if( !( p_vts = ifoOpen( p_sys->p_dvdread,
 678                p_vmg->tt_srpt->title[i_title].title_set_nr ) ) )
 679         {
 680             msg_Err( p_demux, "fatal error in vts ifo" );
 681             return VLC_EGENERIC;
 682         }
 683
 684         /* Title position inside the selected vts */
 685         p_sys->i_ttn = p_vmg->tt_srpt->title[i_title].vts_ttn;
 686
 687         /* Find title start/end */
 688         pgc_id = p_vts->vts_ptt_srpt->title[p_sys->i_ttn - 1].ptt[0].pgcn;
 689         pgn = p_vts->vts_ptt_srpt->title[p_sys->i_ttn - 1].ptt[0].pgn;
 690         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
 691
 692         p_sys->i_title_start_cell =
 693             i_start_cell = p_pgc->program_map[pgn - 1] - 1;
 694         p_sys->i_title_start_block =
 695             p_pgc->cell_playback[i_start_cell].first_sector;
 696
 697         p_sys->i_title_end_cell =
 698             i_end_cell = p_pgc->nr_of_cells - 1;
 699         p_sys->i_title_end_block =
 700             p_pgc->cell_playback[i_end_cell].last_sector;
 701
 702         p_sys->i_title_offset = 0;
 703
 704         p_sys->i_title_blocks = 0;
 705         for( i = i_start_cell; i <= i_end_cell; i++ )
 706         {
 707             p_sys->i_title_blocks += p_pgc->cell_playback[i].last_sector -
 708                 p_pgc->cell_playback[i].first_sector + 1;
 709         }
 710
 711         msg_Dbg( p_demux, "title %d vts_title %d pgc %d pgn %d "
 712                  "start %d end %d blocks: %d",
 713                  i_title + 1, p_sys->i_ttn, pgc_id, pgn,
 714                  p_sys->i_title_start_block, p_sys->i_title_end_block,
 715                  p_sys->i_title_blocks );
 716
 717         /*
 718          * Set properties for current chapter
 719          */
 720         p_sys->i_chapter = 0;
 721         p_sys->i_chapters =
 722             p_vts->vts_ptt_srpt->title[p_sys->i_ttn - 1].nr_of_ptts;
 723
 724         pgc_id = p_vts->vts_ptt_srpt->title[
 725                     p_sys->i_ttn - 1].ptt[p_sys->i_chapter].pgcn;
 726         pgn = p_vts->vts_ptt_srpt->title[
 727                     p_sys->i_ttn - 1].ptt[p_sys->i_chapter].pgn;
 728
 729         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
 730         p_sys->i_pack_len = 0;
 731         p_sys->i_next_cell =
 732             p_sys->i_cur_cell = p_pgc->program_map[pgn - 1] - 1;
 733         DvdReadFindCell( p_demux );
 734
 735         p_sys->i_next_vobu = p_sys->i_cur_block =
 736             p_pgc->cell_playback[p_sys->i_cur_cell].first_sector;
 737
 738         /*
 739          * Angle management
 740          */
 741         p_sys->i_angles = p_vmg->tt_srpt->title[i_title].nr_of_angles;
 742         if( p_sys->i_angle > p_sys->i_angles ) p_sys->i_angle = 1;
 743
 744         /*
 745          * We've got enough info, time to open the title set data.
 746          */
 747         if( !( p_sys->p_title = DVDOpenFile( p_sys->p_dvdread,
 748             p_vmg->tt_srpt->title[i_title].title_set_nr,
 749             DVD_READ_TITLE_VOBS ) ) )
 750         {
 751             msg_Err( p_demux, "cannot open title (VTS_%02d_1.VOB)",
 752                      p_vmg->tt_srpt->title[i_title].title_set_nr );
 753             return VLC_EGENERIC;
 754         }
 755
 756         //IfoPrintTitle( p_demux );
 757
 758         /*
 759          * Destroy obsolete ES by reinitializing program 0
 760          * and find all ES in title with ifo data
 761          */
 762         es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 763
 764         for( i = 0; i < PS_TK_COUNT; i++ )
 765         {
 766             ps_track_t *tk = &p_sys->tk[i];
 767             if( tk->b_seen )
 768             {
 769                 es_format_Clean( &tk->fmt );
 770                 if( tk->es ) es_out_Del( p_demux->out, tk->es );
 771             }
 772             tk->b_seen = VLC_FALSE;
 773         }
 774
 775         if( p_demux->info.i_title != i_title )
 776         {
 777             p_demux->info.i_update |=
 778                 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT;
 779             p_demux->info.i_title = i_title;
 780             p_demux->info.i_seekpoint = 0;
 781         }
 782
 783         /* TODO: re-add angles */
 784
 785
 786         ESNew( p_demux, 0xe0, 0 ); /* Video, FIXME ? */
 787         p_sys->i_aspect = p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio;
 788
 789 #define audio_control \
 790     p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->audio_control[i-1]
 791
 792         /* Audio ES, in the order they appear in the .ifo */
 793         for( i = 1; i <= p_vts->vtsi_mat->nr_of_vts_audio_streams; i++ )
 794         {
 795             int i_position = 0;
 796             uint16_t i_id;
 797
 798             //IfoPrintAudio( p_demux, i );
 799
 800             /* Audio channel is active if first byte is 0x80 */
 801             if( audio_control & 0x8000 )
 802             {
 803                 i_position = ( audio_control & 0x7F00 ) >> 8;
 804
 805                 msg_Dbg( p_demux, "audio position  %d", i_position );
 806                 switch( p_vts->vtsi_mat->vts_audio_attr[i - 1].audio_format )
 807                 {
 808                 case 0x00: /* A52 */
 809                     i_id = (0x80 + i_position) | 0xbd00;
 810                     break;
 811                 case 0x02:
 812                 case 0x03: /* MPEG audio */
 813                     i_id = 0xc000 + i_position;
 814                     break;
 815                 case 0x04: /* LPCM */
 816                     i_id = (0xa0 + i_position) | 0xbd00;
 817                     break;
 818                 case 0x06: /* DTS */
 819                     i_id = (0x88 + i_position) | 0xbd00;
 820                     break;
 821                 default:
 822                     i_id = 0;
 823                     msg_Err( p_demux, "unknown audio type %.2x",
 824                         p_vts->vtsi_mat->vts_audio_attr[i - 1].audio_format );
 825                 }
 826
 827                 ESNew( p_demux, i_id, p_sys->p_vts_file->vtsi_mat->
 828                        vts_audio_attr[i - 1].lang_code );
 829             }
 830         }
 831 #undef audio_control
 832
 833 #define spu_control \
 834     p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->subp_control[i-1]
 835
 836         /* Sub Picture ES */
 837         for( i = 1; i <= p_vts->vtsi_mat->nr_of_vts_subp_streams; i++ )
 838         {
 839             int i_position = 0;
 840             uint16_t i_id;
 841
 842             //IfoPrintSpu( p_sys, i );
 843             msg_Dbg( p_demux, "spu %d 0x%02x", i, spu_control );
 844
 845             if( spu_control & 0x80000000 )
 846             {
 847                 /*  there are several streams for one spu */
 848                 if( p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
 849                 {
 850                     /* 16:9 */
 851                     switch( p_vts->vtsi_mat->vts_video_attr.permitted_df )
 852                     {
 853                     case 1: /* letterbox */
 854                         i_position = spu_control & 0xff;
 855                         break;
 856                     case 2: /* pan&scan */
 857                         i_position = ( spu_control >> 8 ) & 0xff;
 858                         break;
 859                     default: /* widescreen */
 860                         i_position = ( spu_control >> 16 ) & 0xff;
 861                         break;
 862                     }
 863                 }
 864                 else
 865                 {
 866                     /* 4:3 */
 867                     i_position = ( spu_control >> 24 ) & 0x7F;
 868                 }
 869
 870                 i_id = (0x20 + i_position) | 0xbd00;
 871
 872                 ESNew( p_demux, i_id, p_sys->p_vts_file->vtsi_mat->
 873                        vts_subp_attr[i - 1].lang_code );
 874             }
 875         }
 876 #undef spu_control
 877
 878     }
 879     else if( i_title != -1 && i_title != p_sys->i_title )
 880
 881     {
 882         return VLC_EGENERIC; /* Couldn't set title */
 883     }
 884
 885     /*
 886      * Chapter selection
 887      */
 888
 889     if( i_chapter >= 0 && i_chapter <= p_sys->i_chapters )
 890     {
 891         pgc_id = p_vts->vts_ptt_srpt->title[
 892                      p_sys->i_ttn - 1].ptt[i_chapter].pgcn;
 893         pgn = p_vts->vts_ptt_srpt->title[
 894                   p_sys->i_ttn - 1].ptt[i_chapter].pgn;
 895
 896         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
 897
 898         p_sys->i_cur_cell = p_pgc->program_map[pgn - 1] - 1;
 899         p_sys->i_chapter = i_chapter;
 900         DvdReadFindCell( p_demux );
 901
 902         p_sys->i_title_offset = 0;
 903         for( i = p_sys->i_title_start_cell; i < p_sys->i_cur_cell; i++ )
 904         {
 905             p_sys->i_title_offset += p_pgc->cell_playback[i].last_sector -
 906                 p_pgc->cell_playback[i].first_sector + 1;
 907         }
 908
 909         p_sys->i_pack_len = 0;
 910         p_sys->i_next_vobu = p_sys->i_cur_block =
 911             p_pgc->cell_playback[p_sys->i_cur_cell].first_sector;
 912
 913         if( p_demux->info.i_seekpoint != i_chapter )
 914         {
 915             p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 916             p_demux->info.i_seekpoint = i_chapter;
 917         }
 918     }
 919     else if( i_chapter != -1 )
 920
 921     {
 922         return VLC_EGENERIC; /* Couldn't set chapter */
 923     }
 924
 925 #undef p_pgc
 926 #undef p_vts
 927 #undef p_vmg
 928
 929     return VLC_SUCCESS;
 930 }
 931
 932 /*****************************************************************************
 933  * DvdReadSeek : Goes to a given position on the stream.
 934  *****************************************************************************
 935  * This one is used by the input and translate chronological position from
 936  * input to logical position on the device.
 937  *****************************************************************************/
 938 static void DvdReadSeek( demux_t *p_demux, int i_block_offset )
 939 {
 940     demux_sys_t *p_sys = p_demux->p_sys;
 941     int i_chapter = 0;
 942     int i_cell = 0;
 943     int i_vobu = 0;
 944     int i_sub_cell = 0;
 945     int i_block;
 946
 947 #define p_pgc p_sys->p_cur_pgc
 948 #define p_vts p_sys->p_vts_file
 949
 950     /* Find cell */
 951     i_block = i_block_offset;
 952     for( i_cell = p_sys->i_title_start_cell;
 953          i_cell <= p_sys->i_title_end_cell; i_cell++ )
 954     {
 955         if( i_block < (int)p_pgc->cell_playback[i_cell].last_sector -
 956             (int)p_pgc->cell_playback[i_cell].first_sector + 1 ) break;
 957
 958         i_block -= (p_pgc->cell_playback[i_cell].last_sector -
 959             p_pgc->cell_playback[i_cell].first_sector + 1);
 960     }
 961     if( i_cell > p_sys->i_title_end_cell )
 962     {
 963         msg_Err( p_demux, "couldn't find cell for block %i", i_block_offset );
 964         return;
 965     }
 966     i_block += p_pgc->cell_playback[i_cell].first_sector;
 967     p_sys->i_title_offset = i_block_offset;
 968
 969     /* Find chapter */
 970     for( i_chapter = 0; i_chapter < p_sys->i_chapters; i_chapter++ )
 971     {
 972         int pgc_id, pgn, i_tmp;
 973
 974         pgc_id = p_vts->vts_ptt_srpt->title[
 975                     p_sys->i_ttn - 1].ptt[i_chapter].pgcn;
 976         pgn = p_vts->vts_ptt_srpt->title[
 977                     p_sys->i_ttn - 1].ptt[i_chapter].pgn;
 978
 979         i_tmp = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc->program_map[pgn-1];
 980
 981         if( i_tmp > i_cell ) break;
 982     }
 983
 984     if( i_chapter < p_sys->i_chapters &&
 985         p_demux->info.i_seekpoint != i_chapter )
 986     {
 987         p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 988         p_demux->info.i_seekpoint = i_chapter;
 989     }
 990
 991     /* Find vobu */
 992     while( (int)p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu] <= i_block )
 993     {
 994         i_vobu++;
 995     }
 996
 997     /* Find sub_cell */
 998     while( p_vts->vts_c_adt->cell_adr_table[i_sub_cell].start_sector <
 999            p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu-1] )
1000     {
1001         i_sub_cell++;
1002     }
1003
1004 #if 1
1005     msg_Dbg( p_demux, "cell %d i_sub_cell %d chapter %d vobu %d "
1006              "cell_sector %d vobu_sector %d sub_cell_sector %d",
1007              i_cell, i_sub_cell, i_chapter, i_vobu,
1008              p_sys->p_cur_pgc->cell_playback[i_cell].first_sector,
1009              p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu],
1010              p_vts->vts_c_adt->cell_adr_table[i_sub_cell - 1].start_sector);
1011 #endif
1012
1013     p_sys->i_cur_block = i_block;
1014     p_sys->i_next_vobu = p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu];
1015     p_sys->i_pack_len = p_sys->i_next_vobu - i_block;
1016     p_sys->i_cur_cell = i_cell;
1017     p_sys->i_chapter = i_chapter;
1018     DvdReadFindCell( p_demux );
1019
1020 #undef p_vts
1021 #undef p_pgc
1022
1023     return;
1024 }
1025
1026 /*****************************************************************************
1027  * DvdReadHandleDSI
1028  *****************************************************************************/
1029 static void DvdReadHandleDSI( demux_t *p_demux, uint8_t *p_data )
1030 {
1031     demux_sys_t *p_sys = p_demux->p_sys;
1032
1033     navRead_DSI( &p_sys->dsi_pack, &p_data[DSI_START_BYTE] );
1034
1035     /*
1036      * Determine where we go next.  These values are the ones we mostly
1037      * care about.
1038      */
1039     p_sys->i_cur_block = p_sys->dsi_pack.dsi_gi.nv_pck_lbn;
1040
1041     /*
1042      * If we're not at the end of this cell, we can determine the next
1043      * VOBU to display using the VOBU_SRI information section of the
1044      * DSI.  Using this value correctly follows the current angle,
1045      * avoiding the doubled scenes in The Matrix, and makes our life
1046      * really happy.
1047      */
1048     if( p_sys->dsi_pack.vobu_sri.next_vobu != SRI_END_OF_CELL )
1049     {
1050         switch( ( p_sys->dsi_pack.sml_pbi.category & 0xf000 ) >> 12 )
1051         {
1052         case 0x4:
1053             /* Interleaved unit with no angle */
1054             if( p_sys->dsi_pack.sml_pbi.ilvu_sa != 0 )
1055             {
1056                 p_sys->i_next_vobu = p_sys->i_cur_block +
1057                     p_sys->dsi_pack.sml_pbi.ilvu_sa;
1058                 p_sys->i_pack_len = p_sys->dsi_pack.sml_pbi.ilvu_ea;
1059             }
1060             else
1061             {
1062                 p_sys->i_next_vobu = p_sys->i_cur_block +
1063                     p_sys->dsi_pack.dsi_gi.vobu_ea + 1;
1064                 p_sys->i_pack_len = p_sys->dsi_pack.dsi_gi.vobu_ea;
1065             }
1066             break;
1067         case 0x5:
1068             /* vobu is end of ilvu */
1069             if( p_sys->dsi_pack.sml_agli.data[p_sys->i_angle-1].address )
1070             {
1071                 p_sys->i_next_vobu = p_sys->i_cur_block +
1072                     p_sys->dsi_pack.sml_agli.data[p_sys->i_angle-1].address;
1073                 p_sys->i_pack_len = p_sys->dsi_pack.sml_pbi.ilvu_ea;
1074
1075                 break;
1076             }
1077         case 0x6:
1078             /* vobu is beginning of ilvu */
1079         case 0x9:
1080             /* next scr is 0 */
1081         case 0xa:
1082             /* entering interleaved section */
1083         case 0x8:
1084             /* non interleaved cells in interleaved section */
1085         default:
1086             p_sys->i_next_vobu = p_sys->i_cur_block +
1087                 ( p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1088             p_sys->i_pack_len = p_sys->dsi_pack.dsi_gi.vobu_ea;
1089             break;
1090         }
1091     }
1092     else
1093     {
1094         p_sys->i_cur_cell = p_sys->i_next_cell;
1095         DvdReadFindCell( p_demux );
1096
1097         p_sys->i_pack_len = p_sys->dsi_pack.dsi_gi.vobu_ea;
1098         p_sys->i_next_vobu =
1099             p_sys->p_cur_pgc->cell_playback[p_sys->i_cur_cell].first_sector;
1100     }
1101
1102 #if 0
1103     msg_Dbg( p_input, 12, "scr %d lbn 0x%02x vobu_ea %d vob_id %d c_id %d",
1104              p_sys->dsi_pack.dsi_gi.nv_pck_scr,
1105              p_sys->dsi_pack.dsi_gi.nv_pck_lbn,
1106              p_sys->dsi_pack.dsi_gi.vobu_ea,
1107              p_sys->dsi_pack.dsi_gi.vobu_vob_idn,
1108              p_sys->dsi_pack.dsi_gi.vobu_c_idn );
1109
1110     msg_Dbg( p_input, 12, "cat 0x%02x ilvu_ea %d ilvu_sa %d size %d",
1111              p_sys->dsi_pack.sml_pbi.category,
1112              p_sys->dsi_pack.sml_pbi.ilvu_ea,
1113              p_sys->dsi_pack.sml_pbi.ilvu_sa,
1114              p_sys->dsi_pack.sml_pbi.size );
1115
1116     msg_Dbg( p_input, 12, "next_vobu %d next_ilvu1 %d next_ilvu2 %d",
1117              p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff,
1118              p_sys->dsi_pack.sml_agli.data[ p_sys->i_angle - 1 ].address,
1119              p_sys->dsi_pack.sml_agli.data[ p_sys->i_angle ].address);
1120 #endif
1121 }
1122
1123 /*****************************************************************************
1124  * DvdReadFindCell
1125  *****************************************************************************/
1126 static void DvdReadFindCell( demux_t *p_demux )
1127 {
1128     demux_sys_t *p_sys = p_demux->p_sys;
1129
1130     pgc_t *p_pgc;
1131     int   pgc_id, pgn;
1132     int   i = 0;
1133
1134 #define cell p_sys->p_cur_pgc->cell_playback
1135
1136     if( cell[p_sys->i_cur_cell].block_type == BLOCK_TYPE_ANGLE_BLOCK )
1137     {
1138 #if 0
1139         p_sys->i_next_cell = p_sys->i_cur_cell + p_sys->i_angle_nb;
1140         p_sys->i_cur_cell += p_sys->i_angle - 1;
1141 #else
1142         p_sys->i_cur_cell += p_sys->i_angle - 1;
1143
1144         while( cell[p_sys->i_cur_cell+i].block_mode != BLOCK_MODE_LAST_CELL )
1145         {
1146             i++;
1147         }
1148         p_sys->i_next_cell = p_sys->i_cur_cell + i + 1;
1149 #endif
1150     }
1151     else
1152     {
1153         p_sys->i_next_cell = p_sys->i_cur_cell + 1;
1154     }
1155
1156 #undef cell
1157
1158     pgc_id = p_sys->p_vts_file->vts_ptt_srpt->title[
1159                 p_sys->i_ttn - 1].ptt[p_sys->i_chapter].pgcn;
1160     pgn = p_sys->p_vts_file->vts_ptt_srpt->title[
1161               p_sys->i_ttn - 1].ptt[p_sys->i_chapter].pgn;
1162     p_pgc = p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
1163
1164     if( p_pgc->program_map[pgn - 1] <= p_sys->i_cur_cell )
1165     {
1166         p_sys->i_chapter++;
1167
1168         if( p_sys->i_chapter < p_sys->i_chapters &&
1169             p_demux->info.i_seekpoint != p_sys->i_chapter )
1170         {
1171             p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
1172             p_demux->info.i_seekpoint = p_sys->i_chapter;
1173         }
1174     }
1175 }
1176
1177 /*****************************************************************************
1178  * DemuxTitles: get the titles/chapters structure
1179  *****************************************************************************/
1180 static void DemuxTitles( demux_t *p_demux,
1181                          int *pi_title, int *pi_chapter, int *pi_angle )
1182 {
1183     demux_sys_t *p_sys = p_demux->p_sys;
1184     input_title_t *t;
1185     seekpoint_t *s;
1186     int32_t i_titles;
1187     int i;
1188
1189     /* Find out number of titles/chapters */
1190 #define tt_srpt p_sys->p_vmg_file->tt_srpt
1191
1192     i_titles = tt_srpt->nr_of_srpts;
1193     msg_Dbg( p_demux, "number of titles: %d", i_titles );
1194
1195     for( i = 0; i < i_titles; i++ )
1196     {
1197         int32_t i_chapters = 0;
1198         int j;
1199
1200         i_chapters = tt_srpt->title[i].nr_of_ptts;
1201         msg_Dbg( p_demux, "title %d has %d chapters", i, i_chapters );
1202
1203         t = vlc_input_title_New();
1204         t->psz_name = malloc( strlen( _("Title %i") ) + 20 );
1205         sprintf( t->psz_name, _("Title %i"), i + 1 );
1206
1207         for( j = 0; j < __MAX( i_chapters, 1 ); j++ )
1208         {
1209             s = vlc_seekpoint_New();
1210             s->psz_name = malloc( strlen( _("Chapter %i") ) + 20 );
1211             sprintf( s->psz_name, _("Chapter %i"), j + 1 );
1212             TAB_APPEND( t->i_seekpoint, t->seekpoint, s );
1213         }
1214
1215         TAB_APPEND( p_sys->i_titles, p_sys->titles, t );
1216     }
1217
1218     /* Set forced title/chapter/angle */
1219     *pi_title = (*pi_title >= 0 && *pi_title < i_titles) ? *pi_title : 0;
1220     *pi_chapter = (*pi_chapter >= 0 && *pi_chapter <
1221         tt_srpt->title[*pi_title].nr_of_ptts) ? *pi_chapter : 0;
1222
1223 #undef tt_srpt
1224 }
1225
1226 /*****************************************************************************
1227  * ParseCL: parse command line. Titles, chapters and angles start from 1.
1228  *****************************************************************************/
1229 static char *ParseCL( vlc_object_t *p_this, char *psz_name, vlc_bool_t b_force,
1230                       int *i_title, int *i_chapter, int *i_angle )
1231 {
1232     char *psz_parser, *psz_source, *psz_next;
1233
1234     psz_source = strdup( psz_name );
1235     if( psz_source == NULL ) return NULL;
1236
1237     *i_title = 1;
1238     *i_chapter = 1;
1239     *i_angle = 1;
1240
1241     /* Start with the end, because you could have :
1242      * dvdnav:/Volumes/my@toto/VIDEO_TS@1,1
1243      * (yes, this is kludgy). */
1244     for( psz_parser = psz_source + strlen(psz_source) - 1;
1245          psz_parser >= psz_source && *psz_parser != '@';
1246          psz_parser-- );
1247
1248     if( psz_parser >= psz_source && *psz_parser == '@' )
1249     {
1250         /* Found options */
1251         *psz_parser = '\0';
1252         ++psz_parser;
1253
1254         *i_title = (int)strtol( psz_parser, &psz_next, 10 );
1255         if( *psz_next )
1256         {
1257             psz_parser = psz_next + 1;
1258             *i_chapter = (int)strtol( psz_parser, &psz_next, 10 );
1259             if( *psz_next )
1260             {
1261                 *i_angle = (int)strtol( psz_next + 1, NULL, 10 );
1262             }
1263         }
1264     }
1265
1266     *i_title   = *i_title > 0 ? *i_title : 1;
1267     *i_chapter = *i_chapter > 0 ? *i_chapter : 1;
1268     *i_angle   = *i_angle > 0 ? *i_angle : 1;
1269
1270     if( !*psz_source )
1271     {
1272         free( psz_source );
1273         if( !b_force )
1274         {
1275             return NULL;
1276         }
1277         psz_source = config_GetPsz( p_this, "dvd" );
1278         if( !psz_source ) return NULL;
1279     }
1280
1281 #ifdef WIN32
1282     if( psz_source[0] && psz_source[1] == ':' &&
1283         psz_source[2] == '\\' && psz_source[3] == '\0' )
1284     {
1285         psz_source[2] = '\0';
1286     }
1287 #endif
1288
1289     msg_Dbg( p_this, "dvdroot=%s title=%d chapter=%d angle=%d",
1290              psz_source, *i_title, *i_chapter, *i_angle );
1291
1292     /* Get back to a 0-based offset */
1293     (*i_title)--;
1294     (*i_chapter)--;
1295
1296     return psz_source;
1297 }