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