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     dsi_t        dsi_pack;
 122     int          i_ttn;
 123
 124     int i_pack_len;
 125     int i_cur_block;
 126     int i_next_vobu;
 127
 128     /* Current title start/end blocks */
 129     int i_title_start_block;
 130     int i_title_end_block;
 131     int i_title_blocks;
 132     int i_title_offset;
 133
 134     int i_title_start_cell;
 135     int i_title_end_cell;
 136     int i_cur_cell;
 137     int i_next_cell;
 138
 139     /* Track */
 140     ps_track_t    tk[PS_TK_COUNT];
 141     int           i_mux_rate;
 142
 143     int           i_titles;
 144     input_title_t **titles;
 145
 146     /* Video */
 147     int i_aspect;
 148
 149     /* SPU */
 150     uint32_t clut[16];
 151 };
 152
 153 static char *ParseCL( vlc_object_t *, char *, vlc_bool_t, int *, int *, int *);
 154
 155 static int Control   ( demux_t *, int, va_list );
 156 static int Demux     ( demux_t * );
 157 static int DemuxBlock( demux_t *, uint8_t *, int );
 158
 159 static void DemuxTitles( demux_t *, int *, int *, int * );
 160 static void ESNew( demux_t *, int, int );
 161
 162 static int  DvdReadSetArea  ( demux_t *, int, int, int );
 163 static void DvdReadSeek     ( demux_t *, int );
 164 static void DvdReadHandleDSI( demux_t *, uint8_t * );
 165 static void DvdReadFindCell ( demux_t * );
 166
 167 /*****************************************************************************
 168  * Open:
 169  *****************************************************************************/
 170 static int Open( vlc_object_t *p_this )
 171 {
 172     demux_t      *p_demux = (demux_t*)p_this;
 173     demux_sys_t  *p_sys;
 174     int          i_title, i_chapter, i_angle;
 175     char         *psz_name;
 176     char         *psz_dvdcss_env;
 177     dvd_reader_t *p_dvdread;
 178     ifo_handle_t *p_vmg_file;
 179
 180     psz_name = ParseCL( VLC_OBJECT(p_demux), p_demux->psz_path, VLC_TRUE,
 181                         &i_title, &i_chapter, &i_angle );
 182     if( !psz_name )
 183     {
 184         return VLC_EGENERIC;
 185     }
 186
 187     /* Override environment variable DVDCSS_METHOD with config option
 188      * (FIXME: this creates a small memory leak) */
 189     psz_dvdcss_env = config_GetPsz( p_demux, "dvdread-css-method" );
 190     if( psz_dvdcss_env && *psz_dvdcss_env )
 191     {
 192         char *psz_env;
 193
 194         psz_env = malloc( strlen("DVDCSS_METHOD=") +
 195                           strlen( psz_dvdcss_env ) + 1 );
 196
 197         if( !psz_env )
 198         {
 199             free( psz_dvdcss_env );
 200             return VLC_ENOMEM;
 201         }
 202
 203         sprintf( psz_env, "%s%s", "DVDCSS_METHOD=", psz_dvdcss_env );
 204
 205         putenv( psz_env );
 206     }
 207     if( psz_dvdcss_env ) free( psz_dvdcss_env );
 208
 209     /* Open dvdread */
 210     if( !(p_dvdread = DVDOpen( psz_name )) )
 211     {
 212         msg_Err( p_demux, "DVDRead cannot open source: %s", psz_name );
 213         free( psz_name );
 214         return VLC_EGENERIC;
 215     }
 216     free( psz_name );
 217
 218     /* Ifo allocation & initialisation */
 219     if( !( p_vmg_file = ifoOpen( p_dvdread, 0 ) ) )
 220     {
 221         msg_Warn( p_demux, "cannot open VMG info" );
 222         return VLC_EGENERIC;
 223     }
 224     msg_Dbg( p_demux, "VMG opened" );
 225
 226     /* Fill p_demux field */
 227     p_demux->pf_demux = Demux;
 228     p_demux->pf_control = Control;
 229     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 230     memset( p_sys, 0, sizeof( demux_sys_t ) );
 231
 232     ps_track_init( p_sys->tk );
 233     p_sys->i_aspect = -1;
 234     p_sys->i_mux_rate = 0;
 235
 236     p_sys->p_dvdread = p_dvdread;
 237     p_sys->p_vmg_file = p_vmg_file;
 238     p_sys->p_title = NULL;
 239     p_sys->p_vts_file = NULL;
 240
 241     p_sys->i_title = p_sys->i_chapter = -1;
 242     p_sys->i_angle = i_angle;
 243
 244     DemuxTitles( p_demux, &i_title, &i_chapter, &i_angle );
 245
 246     DvdReadSetArea( p_demux, i_title, i_chapter, i_angle );
 247
 248     /* Update default_pts to a suitable value for dvdread access */
 249     var_Create( p_demux, "dvdread-caching",
 250                 VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 251
 252     return VLC_SUCCESS;
 253 }
 254
 255 /*****************************************************************************
 256  * Close:
 257  *****************************************************************************/
 258 static void Close( vlc_object_t *p_this )
 259 {
 260     demux_t     *p_demux = (demux_t*)p_this;
 261     demux_sys_t *p_sys = p_demux->p_sys;
 262     int i;
 263
 264     for( i = 0; i < PS_TK_COUNT; i++ )
 265     {
 266         ps_track_t *tk = &p_sys->tk[i];
 267         if( tk->b_seen )
 268         {
 269             es_format_Clean( &tk->fmt );
 270             if( tk->es ) es_out_Del( p_demux->out, tk->es );
 271         }
 272     }
 273
 274     /* Close libdvdread */
 275     if( p_sys->p_title ) DVDCloseFile( p_sys->p_title );
 276     if( p_sys->p_vts_file ) ifoClose( p_sys->p_vts_file );
 277     if( p_sys->p_vmg_file ) ifoClose( p_sys->p_vmg_file );
 278     DVDClose( p_sys->p_dvdread );
 279
 280     free( p_sys );
 281 }
 282
 283 /*****************************************************************************
 284  * Control:
 285  *****************************************************************************/
 286 static int Control( demux_t *p_demux, int i_query, va_list args )
 287 {
 288     demux_sys_t *p_sys = p_demux->p_sys;
 289     double f, *pf;
 290     vlc_bool_t *pb;
 291     int64_t *pi64;
 292     input_title_t ***ppp_title;
 293     int *pi_int;
 294     int i;
 295
 296     switch( i_query )
 297     {
 298         case DEMUX_GET_POSITION:
 299         {
 300             pf = (double*) va_arg( args, double* );
 301
 302             if( p_sys->i_title_blocks > 0 )
 303                 *pf = (double)p_sys->i_title_offset / p_sys->i_title_blocks;
 304             else
 305                 *pf = 0.0;
 306
 307             return VLC_SUCCESS;
 308         }
 309         case DEMUX_SET_POSITION:
 310         {
 311             f = (double)va_arg( args, double );
 312
 313             DvdReadSeek( p_demux, f * p_sys->i_title_blocks );
 314
 315             return VLC_SUCCESS;
 316         }
 317         case DEMUX_GET_TIME:
 318             pi64 = (int64_t*)va_arg( args, int64_t * );
 319             if( p_sys->i_mux_rate > 0 )
 320             {
 321                 *pi64 = (int64_t)1000000 * DVD_VIDEO_LB_LEN *
 322                         p_sys->i_title_offset / 50 / p_sys->i_mux_rate;
 323                 return VLC_SUCCESS;
 324             }
 325             *pi64 = 0;
 326             return VLC_EGENERIC;
 327
 328         case DEMUX_GET_LENGTH:
 329             pi64 = (int64_t*)va_arg( args, int64_t * );
 330             if( p_sys->i_mux_rate > 0 )
 331             {
 332                 *pi64 = (int64_t)1000000 * DVD_VIDEO_LB_LEN *
 333                         p_sys->i_title_blocks / 50 / p_sys->i_mux_rate;
 334                 return VLC_SUCCESS;
 335             }
 336             *pi64 = 0;
 337             return VLC_EGENERIC;
 338
 339         /* Special for access_demux */
 340         case DEMUX_CAN_PAUSE:
 341         case DEMUX_CAN_CONTROL_PACE:
 342             /* TODO */
 343             pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
 344             *pb = VLC_TRUE;
 345             return VLC_SUCCESS;
 346
 347         case DEMUX_SET_PAUSE_STATE:
 348             return VLC_SUCCESS;
 349
 350         case DEMUX_GET_TITLE_INFO:
 351             ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 352             pi_int    = (int*)va_arg( args, int* );
 353
 354             /* Duplicate title infos */
 355             *pi_int = p_sys->i_titles;
 356             *ppp_title = malloc( sizeof(input_title_t **) * p_sys->i_titles );
 357             for( i = 0; i < p_sys->i_titles; i++ )
 358             {
 359                 (*ppp_title)[i] = vlc_input_title_Duplicate(p_sys->titles[i]);
 360             }
 361             return VLC_SUCCESS;
 362
 363         case DEMUX_SET_TITLE:
 364             i = (int)va_arg( args, int );
 365             if( DvdReadSetArea( p_demux, i, 0, -1 ) != VLC_SUCCESS )
 366             {
 367                 msg_Warn( p_demux, "cannot set title/chapter" );
 368                 return VLC_EGENERIC;
 369             }
 370             p_demux->info.i_update |=
 371                 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT;
 372             p_demux->info.i_title = i;
 373             p_demux->info.i_seekpoint = 0;
 374             return VLC_SUCCESS;
 375
 376         case DEMUX_SET_SEEKPOINT:
 377             i = (int)va_arg( args, int );
 378             if( DvdReadSetArea( p_demux, -1, i, -1 ) != VLC_SUCCESS )
 379             {
 380                 msg_Warn( p_demux, "cannot set title/chapter" );
 381                 return VLC_EGENERIC;
 382             }
 383             p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 384             p_demux->info.i_seekpoint = i;
 385             return VLC_SUCCESS;
 386
 387         case DEMUX_GET_PTS_DELAY:
 388             pi64 = (int64_t*)va_arg( args, int64_t * );
 389             *pi64 = (int64_t)var_GetInteger( p_demux, "dvdread-caching" )*1000;
 390             return VLC_SUCCESS;
 391
 392         /* TODO implement others */
 393         default:
 394             return VLC_EGENERIC;
 395     }
 396 }
 397
 398 /*****************************************************************************
 399  * Demux:
 400  *****************************************************************************/
 401 static int Demux( demux_t *p_demux )
 402 {
 403     demux_sys_t *p_sys = p_demux->p_sys;
 404
 405     uint8_t p_buffer[DVD_VIDEO_LB_LEN * DVD_BLOCK_READ_ONCE];
 406     int i_blocks_once, i_read;
 407     int i;
 408
 409     /*
 410      * Playback by cell in this pgc, starting at the cell for our chapter.
 411      */
 412
 413     /*
 414      * Check end of pack, and select the following one
 415      */
 416     if( !p_sys->i_pack_len )
 417     {
 418         /* Read NAV packet */
 419         if( DVDReadBlocks( p_sys->p_title, p_sys->i_next_vobu,
 420                            1, p_buffer ) != 1 )
 421         {
 422             msg_Err( p_demux, "read failed for block %d", p_sys->i_next_vobu );
 423             return -1;
 424         }
 425
 426         /* Basic check to be sure we don't have a empty title
 427          * go to next title if so */
 428         //assert( p_buffer[41] == 0xbf && p_buffer[1027] == 0xbf );
 429
 430         /* Parse the contained dsi packet */
 431         DvdReadHandleDSI( p_demux, p_buffer );
 432
 433         /* End of title */
 434         if( p_sys->i_next_vobu > p_sys->i_title_end_block )
 435         {
 436             if( p_sys->i_title + 1 >= p_sys->i_titles ) return 0; /* EOF */
 437
 438             DvdReadSetArea( p_demux, p_sys->i_title + 1, 0, -1 );
 439         }
 440
 441         if( p_sys->i_pack_len >= 1024 )
 442         {
 443             msg_Err( p_demux, "i_pack_len >= 1024. This shouldn't happen!" );
 444             return 0; /* EOF */
 445         }
 446
 447         /* FIXME: Ugly kludge: we send the pack block to the input for it
 448          * sometimes has a zero scr and restart the sync */
 449         p_sys->i_cur_block++;
 450         p_sys->i_title_offset++;
 451
 452         DemuxBlock( p_demux, p_buffer, DVD_VIDEO_LB_LEN );
 453     }
 454
 455     if( p_sys->i_cur_block > p_sys->i_title_end_block )
 456     {
 457         if( p_sys->i_title + 1 >= p_sys->i_titles ) return 0; /* EOF */
 458
 459         DvdReadSetArea( p_demux, p_sys->i_title + 1, 0, -1 );
 460     }
 461
 462     /*
 463      * Read actual data
 464      */
 465     i_blocks_once = __MIN( p_sys->i_pack_len, DVD_BLOCK_READ_ONCE );
 466     p_sys->i_pack_len -= i_blocks_once;
 467
 468     /* Reads from DVD */
 469     i_read = DVDReadBlocks( p_sys->p_title, p_sys->i_cur_block,
 470                             i_blocks_once, p_buffer );
 471     if( i_read != i_blocks_once )
 472     {
 473         msg_Err( p_demux, "read failed for %d/%d blocks at 0x%02x",
 474                  i_read, i_blocks_once, p_sys->i_cur_block );
 475         return -1;
 476     }
 477
 478     p_sys->i_cur_block += i_read;
 479     p_sys->i_title_offset += i_read;
 480
 481 #if 0
 482     msg_Dbg( p_demux, "i_blocks: %d len: %d current: 0x%02x",
 483              i_read, p_sys->i_pack_len, p_sys->i_cur_block );
 484 #endif
 485
 486     for( i = 0; i < i_read; i++ )
 487     {
 488         DemuxBlock( p_demux, p_buffer + i * DVD_VIDEO_LB_LEN,
 489                     DVD_VIDEO_LB_LEN );
 490     }
 491
 492 #undef p_pgc
 493
 494     return 1;
 495 }
 496
 497 /*****************************************************************************
 498  * DemuxBlock: demux a given block
 499  *****************************************************************************/
 500 static int DemuxBlock( demux_t *p_demux, uint8_t *pkt, int i_pkt )
 501 {
 502     demux_sys_t *p_sys = p_demux->p_sys;
 503     uint8_t     *p = pkt;
 504
 505     while( p < &pkt[i_pkt] )
 506     {
 507         int i_size = ps_pkt_size( p, &pkt[i_pkt] - p );
 508         block_t *p_pkt;
 509         if( i_size <= 0 )
 510         {
 511             break;
 512         }
 513
 514         /* Create a block */
 515         p_pkt = block_New( p_demux, i_size );
 516         memcpy( p_pkt->p_buffer, p, i_size);
 517
 518         /* Parse it and send it */
 519         switch( 0x100 | p[3] )
 520         {
 521         case 0x1b9:
 522         case 0x1bb:
 523         case 0x1bc:
 524
 525 #ifdef DVDREAD_DEBUG
 526             if( p[3] == 0xbc )
 527             {
 528                 msg_Warn( p_demux, "received a PSM packet" );
 529             }
 530             else if( p[3] == 0xbb )
 531             {
 532                 msg_Warn( p_demux, "received a SYSTEM packet" );
 533             }
 534 #endif
 535             block_Release( p_pkt );
 536             break;
 537
 538         case 0x1ba:
 539         {
 540             int64_t i_scr;
 541             int i_mux_rate;
 542             if( !ps_pkt_parse_pack( p_pkt, &i_scr, &i_mux_rate ) )
 543             {
 544                 es_out_Control( p_demux->out, ES_OUT_SET_PCR, i_scr );
 545                 if( i_mux_rate > 0 ) p_sys->i_mux_rate = i_mux_rate;
 546             }
 547             block_Release( p_pkt );
 548             break;
 549         }
 550         default:
 551         {
 552             int i_id = ps_pkt_id( p_pkt );
 553             if( i_id >= 0xc0 )
 554             {
 555                 ps_track_t *tk = &p_sys->tk[PS_ID_TO_TK(i_id)];
 556
 557                 if( !tk->b_seen )
 558                 {
 559                     ESNew( p_demux, i_id, 0 );
 560                 }
 561                 if( tk->b_seen && tk->es &&
 562                     !ps_pkt_parse_pes( p_pkt, tk->i_skip ) )
 563                 {
 564                     es_out_Send( p_demux->out, tk->es, p_pkt );
 565                 }
 566                 else
 567                 {
 568                     block_Release( p_pkt );
 569                 }
 570             }
 571             else
 572             {
 573                 block_Release( p_pkt );
 574             }
 575             break;
 576         }
 577         }
 578
 579         p += i_size;
 580     }
 581
 582     return VLC_SUCCESS;
 583 }
 584
 585 /*****************************************************************************
 586  * ESNew: register a new elementary stream
 587  *****************************************************************************/
 588 static void ESNew( demux_t *p_demux, int i_id, int i_lang )
 589 {
 590     demux_sys_t *p_sys = p_demux->p_sys;
 591     ps_track_t  *tk = &p_sys->tk[PS_ID_TO_TK(i_id)];
 592     char psz_language[3];
 593
 594     if( tk->b_seen ) return;
 595
 596     if( ps_track_fill( tk, i_id ) )
 597     {
 598         msg_Warn( p_demux, "unknown codec for id=0x%x", i_id );
 599         return;
 600     }
 601
 602     psz_language[0] = psz_language[1] = psz_language[2] = 0;
 603     if( i_lang && i_lang != 0xffff )
 604     {
 605         psz_language[0] = (i_lang >> 8)&0xff;
 606         psz_language[1] = (i_lang     )&0xff;
 607     }
 608
 609     /* Add a new ES */
 610     if( tk->fmt.i_cat == VIDEO_ES )
 611     {
 612         if( p_sys->i_aspect >= 0 )
 613         {
 614             tk->fmt.video.i_aspect = p_sys->i_aspect;
 615         }
 616     }
 617     else if( tk->fmt.i_cat == AUDIO_ES )
 618     {
 619         int i_audio = -1;
 620         /* find the audio number PLEASE find another way */
 621         if( (i_id&0xbdf8) == 0xbd88 )       /* dts */
 622         {
 623             i_audio = i_id&0x07;
 624         }
 625         else if( (i_id&0xbdf0) == 0xbd80 )  /* a52 */
 626         {
 627             i_audio = i_id&0xf;
 628         }
 629         else if( (i_id&0xbdf0) == 0xbda0 )  /* lpcm */
 630         {
 631             i_audio = i_id&0x1f;
 632         }
 633         else if( ( i_id&0xe0 ) == 0xc0 )    /* mpga */
 634         {
 635             i_audio = i_id&0x1f;
 636         }
 637
 638         if( psz_language[0] ) tk->fmt.psz_language = strdup( psz_language );
 639     }
 640     else if( tk->fmt.i_cat == SPU_ES )
 641     {
 642         /* Palette */
 643         tk->fmt.subs.spu.palette[0] = 0xBeef;
 644         memcpy( &tk->fmt.subs.spu.palette[1], p_sys->clut,
 645                 16 * sizeof( uint32_t ) );
 646
 647         if( psz_language[0] ) tk->fmt.psz_language = strdup( psz_language );
 648     }
 649
 650     tk->es = es_out_Add( p_demux->out, &tk->fmt );
 651     tk->b_seen = VLC_TRUE;
 652 }
 653
 654 /*****************************************************************************
 655  * DvdReadSetArea: initialize input data for title x, chapter y.
 656  * It should be called for each user navigation request.
 657  *****************************************************************************
 658  * Take care that i_title and i_chapter start from 0.
 659  *****************************************************************************/
 660 static int DvdReadSetArea( demux_t *p_demux, int i_title, int i_chapter,
 661                            int i_angle )
 662 {
 663     demux_sys_t *p_sys = p_demux->p_sys;
 664     int pgc_id = 0, pgn = 0;
 665     int i;
 666
 667 #define p_pgc p_sys->p_cur_pgc
 668 #define p_vmg p_sys->p_vmg_file
 669 #define p_vts p_sys->p_vts_file
 670
 671     if( i_title >= 0 && i_title < p_sys->i_titles &&
 672         i_title != p_sys->i_title )
 673     {
 674         int i_start_cell, i_end_cell;
 675
 676         if( p_sys->p_title != NULL ) DVDCloseFile( p_sys->p_title );
 677         if( p_vts != NULL ) ifoClose( p_vts );
 678         p_sys->i_title = i_title;
 679
 680         /*
 681          *  We have to load all title information
 682          */
 683         msg_Dbg( p_demux, "open VTS %d, for title %d",
 684                  p_vmg->tt_srpt->title[i_title].title_set_nr, i_title + 1 );
 685
 686         /* Ifo vts */
 687         if( !( p_vts = ifoOpen( p_sys->p_dvdread,
 688                p_vmg->tt_srpt->title[i_title].title_set_nr ) ) )
 689         {
 690             msg_Err( p_demux, "fatal error in vts ifo" );
 691             return VLC_EGENERIC;
 692         }
 693
 694         /* Title position inside the selected vts */
 695         p_sys->i_ttn = p_vmg->tt_srpt->title[i_title].vts_ttn;
 696
 697         /* Find title start/end */
 698         pgc_id = p_vts->vts_ptt_srpt->title[p_sys->i_ttn - 1].ptt[0].pgcn;
 699         pgn = p_vts->vts_ptt_srpt->title[p_sys->i_ttn - 1].ptt[0].pgn;
 700         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
 701
 702         p_sys->i_title_start_cell =
 703             i_start_cell = p_pgc->program_map[pgn - 1] - 1;
 704         p_sys->i_title_start_block =
 705             p_pgc->cell_playback[i_start_cell].first_sector;
 706
 707         p_sys->i_title_end_cell =
 708             i_end_cell = p_pgc->nr_of_cells - 1;
 709         p_sys->i_title_end_block =
 710             p_pgc->cell_playback[i_end_cell].last_sector;
 711
 712         p_sys->i_title_offset = 0;
 713
 714         p_sys->i_title_blocks = 0;
 715         for( i = i_start_cell; i <= i_end_cell; i++ )
 716         {
 717             p_sys->i_title_blocks += p_pgc->cell_playback[i].last_sector -
 718                 p_pgc->cell_playback[i].first_sector + 1;
 719         }
 720
 721         msg_Dbg( p_demux, "title %d vts_title %d pgc %d pgn %d "
 722                  "start %d end %d blocks: %d",
 723                  i_title + 1, p_sys->i_ttn, pgc_id, pgn,
 724                  p_sys->i_title_start_block, p_sys->i_title_end_block,
 725                  p_sys->i_title_blocks );
 726
 727         /*
 728          * Set properties for current chapter
 729          */
 730         p_sys->i_chapter = 0;
 731         p_sys->i_chapters =
 732             p_vts->vts_ptt_srpt->title[p_sys->i_ttn - 1].nr_of_ptts;
 733
 734         pgc_id = p_vts->vts_ptt_srpt->title[
 735                     p_sys->i_ttn - 1].ptt[p_sys->i_chapter].pgcn;
 736         pgn = p_vts->vts_ptt_srpt->title[
 737                     p_sys->i_ttn - 1].ptt[p_sys->i_chapter].pgn;
 738
 739         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
 740         p_sys->i_pack_len = 0;
 741         p_sys->i_next_cell =
 742             p_sys->i_cur_cell = p_pgc->program_map[pgn - 1] - 1;
 743         DvdReadFindCell( p_demux );
 744
 745         p_sys->i_next_vobu = p_sys->i_cur_block =
 746             p_pgc->cell_playback[p_sys->i_cur_cell].first_sector;
 747
 748         /*
 749          * Angle management
 750          */
 751         p_sys->i_angles = p_vmg->tt_srpt->title[i_title].nr_of_angles;
 752         if( p_sys->i_angle > p_sys->i_angles ) p_sys->i_angle = 1;
 753
 754         /*
 755          * We've got enough info, time to open the title set data.
 756          */
 757         if( !( p_sys->p_title = DVDOpenFile( p_sys->p_dvdread,
 758             p_vmg->tt_srpt->title[i_title].title_set_nr,
 759             DVD_READ_TITLE_VOBS ) ) )
 760         {
 761             msg_Err( p_demux, "cannot open title (VTS_%02d_1.VOB)",
 762                      p_vmg->tt_srpt->title[i_title].title_set_nr );
 763             return VLC_EGENERIC;
 764         }
 765
 766         //IfoPrintTitle( p_demux );
 767
 768         /*
 769          * Destroy obsolete ES by reinitializing program 0
 770          * and find all ES in title with ifo data
 771          */
 772         es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
 773
 774         for( i = 0; i < PS_TK_COUNT; i++ )
 775         {
 776             ps_track_t *tk = &p_sys->tk[i];
 777             if( tk->b_seen )
 778             {
 779                 es_format_Clean( &tk->fmt );
 780                 if( tk->es ) es_out_Del( p_demux->out, tk->es );
 781             }
 782             tk->b_seen = VLC_FALSE;
 783         }
 784
 785         if( p_demux->info.i_title != i_title )
 786         {
 787             p_demux->info.i_update |=
 788                 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT;
 789             p_demux->info.i_title = i_title;
 790             p_demux->info.i_seekpoint = 0;
 791         }
 792
 793         /* TODO: re-add angles */
 794
 795
 796         ESNew( p_demux, 0xe0, 0 ); /* Video, FIXME ? */
 797         p_sys->i_aspect = p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio;
 798
 799 #define audio_control \
 800     p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->audio_control[i-1]
 801
 802         /* Audio ES, in the order they appear in the .ifo */
 803         for( i = 1; i <= p_vts->vtsi_mat->nr_of_vts_audio_streams; i++ )
 804         {
 805             int i_position = 0;
 806             uint16_t i_id;
 807
 808             //IfoPrintAudio( p_demux, i );
 809
 810             /* Audio channel is active if first byte is 0x80 */
 811             if( audio_control & 0x8000 )
 812             {
 813                 i_position = ( audio_control & 0x7F00 ) >> 8;
 814
 815                 msg_Dbg( p_demux, "audio position  %d", i_position );
 816                 switch( p_vts->vtsi_mat->vts_audio_attr[i - 1].audio_format )
 817                 {
 818                 case 0x00: /* A52 */
 819                     i_id = (0x80 + i_position) | 0xbd00;
 820                     break;
 821                 case 0x02:
 822                 case 0x03: /* MPEG audio */
 823                     i_id = 0xc000 + i_position;
 824                     break;
 825                 case 0x04: /* LPCM */
 826                     i_id = (0xa0 + i_position) | 0xbd00;
 827                     break;
 828                 case 0x06: /* DTS */
 829                     i_id = (0x88 + i_position) | 0xbd00;
 830                     break;
 831                 default:
 832                     i_id = 0;
 833                     msg_Err( p_demux, "unknown audio type %.2x",
 834                         p_vts->vtsi_mat->vts_audio_attr[i - 1].audio_format );
 835                 }
 836
 837                 ESNew( p_demux, i_id, p_sys->p_vts_file->vtsi_mat->
 838                        vts_audio_attr[i - 1].lang_code );
 839             }
 840         }
 841 #undef audio_control
 842
 843 #define spu_palette \
 844     p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->palette
 845
 846         memcpy( p_sys->clut, spu_palette, 16 * sizeof( uint32_t ) );
 847
 848 #define spu_control \
 849     p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->subp_control[i-1]
 850
 851         /* Sub Picture ES */
 852         for( i = 1; i <= p_vts->vtsi_mat->nr_of_vts_subp_streams; i++ )
 853         {
 854             int i_position = 0;
 855             uint16_t i_id;
 856
 857             //IfoPrintSpu( p_sys, i );
 858             msg_Dbg( p_demux, "spu %d 0x%02x", i, spu_control );
 859
 860             if( spu_control & 0x80000000 )
 861             {
 862                 /*  there are several streams for one spu */
 863                 if( p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
 864                 {
 865                     /* 16:9 */
 866                     switch( p_vts->vtsi_mat->vts_video_attr.permitted_df )
 867                     {
 868                     case 1: /* letterbox */
 869                         i_position = spu_control & 0xff;
 870                         break;
 871                     case 2: /* pan&scan */
 872                         i_position = ( spu_control >> 8 ) & 0xff;
 873                         break;
 874                     default: /* widescreen */
 875                         i_position = ( spu_control >> 16 ) & 0xff;
 876                         break;
 877                     }
 878                 }
 879                 else
 880                 {
 881                     /* 4:3 */
 882                     i_position = ( spu_control >> 24 ) & 0x7F;
 883                 }
 884
 885                 i_id = (0x20 + i_position) | 0xbd00;
 886
 887                 ESNew( p_demux, i_id, p_sys->p_vts_file->vtsi_mat->
 888                        vts_subp_attr[i - 1].lang_code );
 889             }
 890         }
 891 #undef spu_control
 892
 893     }
 894     else if( i_title != -1 && i_title != p_sys->i_title )
 895
 896     {
 897         return VLC_EGENERIC; /* Couldn't set title */
 898     }
 899
 900     /*
 901      * Chapter selection
 902      */
 903
 904     if( i_chapter >= 0 && i_chapter <= p_sys->i_chapters )
 905     {
 906         pgc_id = p_vts->vts_ptt_srpt->title[
 907                      p_sys->i_ttn - 1].ptt[i_chapter].pgcn;
 908         pgn = p_vts->vts_ptt_srpt->title[
 909                   p_sys->i_ttn - 1].ptt[i_chapter].pgn;
 910
 911         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
 912
 913         p_sys->i_cur_cell = p_pgc->program_map[pgn - 1] - 1;
 914         p_sys->i_chapter = i_chapter;
 915         DvdReadFindCell( p_demux );
 916
 917         p_sys->i_title_offset = 0;
 918         for( i = p_sys->i_title_start_cell; i < p_sys->i_cur_cell; i++ )
 919         {
 920             p_sys->i_title_offset += p_pgc->cell_playback[i].last_sector -
 921                 p_pgc->cell_playback[i].first_sector + 1;
 922         }
 923
 924         p_sys->i_pack_len = 0;
 925         p_sys->i_next_vobu = p_sys->i_cur_block =
 926             p_pgc->cell_playback[p_sys->i_cur_cell].first_sector;
 927
 928         if( p_demux->info.i_seekpoint != i_chapter )
 929         {
 930             p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 931             p_demux->info.i_seekpoint = i_chapter;
 932         }
 933     }
 934     else if( i_chapter != -1 )
 935
 936     {
 937         return VLC_EGENERIC; /* Couldn't set chapter */
 938     }
 939
 940 #undef p_pgc
 941 #undef p_vts
 942 #undef p_vmg
 943
 944     return VLC_SUCCESS;
 945 }
 946
 947 /*****************************************************************************
 948  * DvdReadSeek : Goes to a given position on the stream.
 949  *****************************************************************************
 950  * This one is used by the input and translate chronological position from
 951  * input to logical position on the device.
 952  *****************************************************************************/
 953 static void DvdReadSeek( demux_t *p_demux, int i_block_offset )
 954 {
 955     demux_sys_t *p_sys = p_demux->p_sys;
 956     int i_chapter = 0;
 957     int i_cell = 0;
 958     int i_vobu = 0;
 959     int i_sub_cell = 0;
 960     int i_block;
 961
 962 #define p_pgc p_sys->p_cur_pgc
 963 #define p_vts p_sys->p_vts_file
 964
 965     /* Find cell */
 966     i_block = i_block_offset;
 967     for( i_cell = p_sys->i_title_start_cell;
 968          i_cell <= p_sys->i_title_end_cell; i_cell++ )
 969     {
 970         if( i_block < (int)p_pgc->cell_playback[i_cell].last_sector -
 971             (int)p_pgc->cell_playback[i_cell].first_sector + 1 ) break;
 972
 973         i_block -= (p_pgc->cell_playback[i_cell].last_sector -
 974             p_pgc->cell_playback[i_cell].first_sector + 1);
 975     }
 976     if( i_cell > p_sys->i_title_end_cell )
 977     {
 978         msg_Err( p_demux, "couldn't find cell for block %i", i_block_offset );
 979         return;
 980     }
 981     i_block += p_pgc->cell_playback[i_cell].first_sector;
 982     p_sys->i_title_offset = i_block_offset;
 983
 984     /* Find chapter */
 985     for( i_chapter = 0; i_chapter < p_sys->i_chapters; i_chapter++ )
 986     {
 987         int pgc_id, pgn, i_tmp;
 988
 989         pgc_id = p_vts->vts_ptt_srpt->title[
 990                     p_sys->i_ttn - 1].ptt[i_chapter].pgcn;
 991         pgn = p_vts->vts_ptt_srpt->title[
 992                     p_sys->i_ttn - 1].ptt[i_chapter].pgn;
 993
 994         i_tmp = p_vts->vts_pgcit->pgci_srp[pgc_id - 1].pgc->program_map[pgn-1];
 995
 996         if( i_tmp > i_cell ) break;
 997     }
 998
 999     if( i_chapter < p_sys->i_chapters &&
1000         p_demux->info.i_seekpoint != i_chapter )
1001     {
1002         p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
1003         p_demux->info.i_seekpoint = i_chapter;
1004     }
1005
1006     /* Find vobu */
1007     while( (int)p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu] <= i_block )
1008     {
1009         i_vobu++;
1010     }
1011
1012     /* Find sub_cell */
1013     while( p_vts->vts_c_adt->cell_adr_table[i_sub_cell].start_sector <
1014            p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu-1] )
1015     {
1016         i_sub_cell++;
1017     }
1018
1019 #if 1
1020     msg_Dbg( p_demux, "cell %d i_sub_cell %d chapter %d vobu %d "
1021              "cell_sector %d vobu_sector %d sub_cell_sector %d",
1022              i_cell, i_sub_cell, i_chapter, i_vobu,
1023              p_sys->p_cur_pgc->cell_playback[i_cell].first_sector,
1024              p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu],
1025              p_vts->vts_c_adt->cell_adr_table[i_sub_cell - 1].start_sector);
1026 #endif
1027
1028     p_sys->i_cur_block = i_block;
1029     p_sys->i_next_vobu = p_vts->vts_vobu_admap->vobu_start_sectors[i_vobu];
1030     p_sys->i_pack_len = p_sys->i_next_vobu - i_block;
1031     p_sys->i_cur_cell = i_cell;
1032     p_sys->i_chapter = i_chapter;
1033     DvdReadFindCell( p_demux );
1034
1035 #undef p_vts
1036 #undef p_pgc
1037
1038     return;
1039 }
1040
1041 /*****************************************************************************
1042  * DvdReadHandleDSI
1043  *****************************************************************************/
1044 static void DvdReadHandleDSI( demux_t *p_demux, uint8_t *p_data )
1045 {
1046     demux_sys_t *p_sys = p_demux->p_sys;
1047
1048     navRead_DSI( &p_sys->dsi_pack, &p_data[DSI_START_BYTE] );
1049
1050     /*
1051      * Determine where we go next.  These values are the ones we mostly
1052      * care about.
1053      */
1054     p_sys->i_cur_block = p_sys->dsi_pack.dsi_gi.nv_pck_lbn;
1055
1056     /*
1057      * If we're not at the end of this cell, we can determine the next
1058      * VOBU to display using the VOBU_SRI information section of the
1059      * DSI.  Using this value correctly follows the current angle,
1060      * avoiding the doubled scenes in The Matrix, and makes our life
1061      * really happy.
1062      */
1063     if( p_sys->dsi_pack.vobu_sri.next_vobu != SRI_END_OF_CELL )
1064     {
1065         switch( ( p_sys->dsi_pack.sml_pbi.category & 0xf000 ) >> 12 )
1066         {
1067         case 0x4:
1068             /* Interleaved unit with no angle */
1069             if( p_sys->dsi_pack.sml_pbi.ilvu_sa != 0 )
1070             {
1071                 p_sys->i_next_vobu = p_sys->i_cur_block +
1072                     p_sys->dsi_pack.sml_pbi.ilvu_sa;
1073                 p_sys->i_pack_len = p_sys->dsi_pack.sml_pbi.ilvu_ea;
1074             }
1075             else
1076             {
1077                 p_sys->i_next_vobu = p_sys->i_cur_block +
1078                     p_sys->dsi_pack.dsi_gi.vobu_ea + 1;
1079                 p_sys->i_pack_len = p_sys->dsi_pack.dsi_gi.vobu_ea;
1080             }
1081             break;
1082         case 0x5:
1083             /* vobu is end of ilvu */
1084             if( p_sys->dsi_pack.sml_agli.data[p_sys->i_angle-1].address )
1085             {
1086                 p_sys->i_next_vobu = p_sys->i_cur_block +
1087                     p_sys->dsi_pack.sml_agli.data[p_sys->i_angle-1].address;
1088                 p_sys->i_pack_len = p_sys->dsi_pack.sml_pbi.ilvu_ea;
1089
1090                 break;
1091             }
1092         case 0x6:
1093             /* vobu is beginning of ilvu */
1094         case 0x9:
1095             /* next scr is 0 */
1096         case 0xa:
1097             /* entering interleaved section */
1098         case 0x8:
1099             /* non interleaved cells in interleaved section */
1100         default:
1101             p_sys->i_next_vobu = p_sys->i_cur_block +
1102                 ( p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1103             p_sys->i_pack_len = p_sys->dsi_pack.dsi_gi.vobu_ea;
1104             break;
1105         }
1106     }
1107     else
1108     {
1109         p_sys->i_cur_cell = p_sys->i_next_cell;
1110         DvdReadFindCell( p_demux );
1111
1112         p_sys->i_pack_len = p_sys->dsi_pack.dsi_gi.vobu_ea;
1113         p_sys->i_next_vobu =
1114             p_sys->p_cur_pgc->cell_playback[p_sys->i_cur_cell].first_sector;
1115     }
1116
1117 #if 0
1118     msg_Dbg( p_demux, 12, "scr %d lbn 0x%02x vobu_ea %d vob_id %d c_id %d",
1119              p_sys->dsi_pack.dsi_gi.nv_pck_scr,
1120              p_sys->dsi_pack.dsi_gi.nv_pck_lbn,
1121              p_sys->dsi_pack.dsi_gi.vobu_ea,
1122              p_sys->dsi_pack.dsi_gi.vobu_vob_idn,
1123              p_sys->dsi_pack.dsi_gi.vobu_c_idn );
1124
1125     msg_Dbg( p_demux, 12, "cat 0x%02x ilvu_ea %d ilvu_sa %d size %d",
1126              p_sys->dsi_pack.sml_pbi.category,
1127              p_sys->dsi_pack.sml_pbi.ilvu_ea,
1128              p_sys->dsi_pack.sml_pbi.ilvu_sa,
1129              p_sys->dsi_pack.sml_pbi.size );
1130
1131     msg_Dbg( p_demux, 12, "next_vobu %d next_ilvu1 %d next_ilvu2 %d",
1132              p_sys->dsi_pack.vobu_sri.next_vobu & 0x7fffffff,
1133              p_sys->dsi_pack.sml_agli.data[ p_sys->i_angle - 1 ].address,
1134              p_sys->dsi_pack.sml_agli.data[ p_sys->i_angle ].address);
1135 #endif
1136 }
1137
1138 /*****************************************************************************
1139  * DvdReadFindCell
1140  *****************************************************************************/
1141 static void DvdReadFindCell( demux_t *p_demux )
1142 {
1143     demux_sys_t *p_sys = p_demux->p_sys;
1144
1145     pgc_t *p_pgc;
1146     int   pgc_id, pgn;
1147     int   i = 0;
1148
1149 #define cell p_sys->p_cur_pgc->cell_playback
1150
1151     if( cell[p_sys->i_cur_cell].block_type == BLOCK_TYPE_ANGLE_BLOCK )
1152     {
1153         p_sys->i_cur_cell += p_sys->i_angle - 1;
1154
1155         while( cell[p_sys->i_cur_cell+i].block_mode != BLOCK_MODE_LAST_CELL )
1156         {
1157             i++;
1158         }
1159         p_sys->i_next_cell = p_sys->i_cur_cell + i + 1;
1160     }
1161     else
1162     {
1163         p_sys->i_next_cell = p_sys->i_cur_cell + 1;
1164     }
1165
1166 #undef cell
1167
1168     pgc_id = p_sys->p_vts_file->vts_ptt_srpt->title[
1169                 p_sys->i_ttn - 1].ptt[p_sys->i_chapter].pgcn;
1170     pgn = p_sys->p_vts_file->vts_ptt_srpt->title[
1171               p_sys->i_ttn - 1].ptt[p_sys->i_chapter].pgn;
1172     p_pgc = p_sys->p_vts_file->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
1173
1174     if( p_pgc->program_map[pgn - 1] <= p_sys->i_cur_cell )
1175     {
1176         p_sys->i_chapter++;
1177
1178         if( p_sys->i_chapter < p_sys->i_chapters &&
1179             p_demux->info.i_seekpoint != p_sys->i_chapter )
1180         {
1181             p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
1182             p_demux->info.i_seekpoint = p_sys->i_chapter;
1183         }
1184     }
1185 }
1186
1187 /*****************************************************************************
1188  * DemuxTitles: get the titles/chapters structure
1189  *****************************************************************************/
1190 static void DemuxTitles( demux_t *p_demux,
1191                          int *pi_title, int *pi_chapter, int *pi_angle )
1192 {
1193     demux_sys_t *p_sys = p_demux->p_sys;
1194     input_title_t *t;
1195     seekpoint_t *s;
1196     int32_t i_titles;
1197     int i;
1198
1199     /* Find out number of titles/chapters */
1200 #define tt_srpt p_sys->p_vmg_file->tt_srpt
1201
1202     i_titles = tt_srpt->nr_of_srpts;
1203     msg_Dbg( p_demux, "number of titles: %d", i_titles );
1204
1205     for( i = 0; i < i_titles; i++ )
1206     {
1207         int32_t i_chapters = 0;
1208         int j;
1209
1210         i_chapters = tt_srpt->title[i].nr_of_ptts;
1211         msg_Dbg( p_demux, "title %d has %d chapters", i, i_chapters );
1212
1213         t = vlc_input_title_New();
1214         t->psz_name = malloc( strlen( _("Title %i") ) + 20 );
1215         sprintf( t->psz_name, _("Title %i"), i + 1 );
1216
1217         for( j = 0; j < __MAX( i_chapters, 1 ); j++ )
1218         {
1219             s = vlc_seekpoint_New();
1220             s->psz_name = malloc( strlen( _("Chapter %i") ) + 20 );
1221             sprintf( s->psz_name, _("Chapter %i"), j + 1 );
1222             TAB_APPEND( t->i_seekpoint, t->seekpoint, s );
1223         }
1224
1225         TAB_APPEND( p_sys->i_titles, p_sys->titles, t );
1226     }
1227
1228     /* Set forced title/chapter/angle */
1229     *pi_title = (*pi_title >= 0 && *pi_title < i_titles) ? *pi_title : 0;
1230     *pi_chapter = (*pi_chapter >= 0 && *pi_chapter <
1231         tt_srpt->title[*pi_title].nr_of_ptts) ? *pi_chapter : 0;
1232
1233 #undef tt_srpt
1234 }
1235
1236 /*****************************************************************************
1237  * ParseCL: parse command line. Titles, chapters and angles start from 1.
1238  *****************************************************************************/
1239 static char *ParseCL( vlc_object_t *p_this, char *psz_name, vlc_bool_t b_force,
1240                       int *i_title, int *i_chapter, int *i_angle )
1241 {
1242     char *psz_parser, *psz_source, *psz_next;
1243
1244     psz_source = strdup( psz_name );
1245     if( psz_source == NULL ) return NULL;
1246
1247     *i_title = 1;
1248     *i_chapter = 1;
1249     *i_angle = 1;
1250
1251     /* Start with the end, because you could have :
1252      * dvdnav:/Volumes/my@toto/VIDEO_TS@1,1
1253      * (yes, this is kludgy). */
1254     for( psz_parser = psz_source + strlen(psz_source) - 1;
1255          psz_parser >= psz_source && *psz_parser != '@';
1256          psz_parser-- );
1257
1258     if( psz_parser >= psz_source && *psz_parser == '@' )
1259     {
1260         /* Found options */
1261         *psz_parser = '\0';
1262         ++psz_parser;
1263
1264         *i_title = (int)strtol( psz_parser, &psz_next, 10 );
1265         if( *psz_next )
1266         {
1267             psz_parser = psz_next + 1;
1268             *i_chapter = (int)strtol( psz_parser, &psz_next, 10 );
1269             if( *psz_next )
1270             {
1271                 *i_angle = (int)strtol( psz_next + 1, NULL, 10 );
1272             }
1273         }
1274     }
1275
1276     *i_title   = *i_title > 0 ? *i_title : 1;
1277     *i_chapter = *i_chapter > 0 ? *i_chapter : 1;
1278     *i_angle   = *i_angle > 0 ? *i_angle : 1;
1279
1280     if( !*psz_source )
1281     {
1282         free( psz_source );
1283         if( !b_force )
1284         {
1285             return NULL;
1286         }
1287         psz_source = config_GetPsz( p_this, "dvd" );
1288         if( !psz_source ) return NULL;
1289     }
1290
1291 #ifdef WIN32
1292     if( psz_source[0] && psz_source[1] == ':' &&
1293         psz_source[2] == '\\' && psz_source[3] == '\0' )
1294     {
1295         psz_source[2] = '\0';
1296     }
1297 #endif
1298
1299     msg_Dbg( p_this, "dvdroot=%s title=%d chapter=%d angle=%d",
1300              psz_source, *i_title, *i_chapter, *i_angle );
1301
1302     /* Get back to a 0-based offset */
1303     (*i_title)--;
1304     (*i_chapter)--;
1305
1306     return psz_source;
1307 }