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

   1 /* access.c: DVD access plugin.
   2  *****************************************************************************
   3  * This plugins should handle all the known specificities of the DVD format,
   4  * especially the 2048 bytes logical block size.
   5  * It depends on:
   6  *  -libdvdcss for access and unscrambling
   7  *  -ifo.* for ifo parsing and analyse
   8  *  -udf.* to find files
   9  *****************************************************************************
  10  * Copyright (C) 1998-2001 VideoLAN
  11  * $Id: access.c,v 1.8 2002/12/31 01:54:35 massiot Exp $
  12  *
  13  * Author: Stéphane Borel <stef@via.ecp.fr>
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  28  *****************************************************************************/
  29
  30 /*****************************************************************************
  31  * Preamble
  32  *****************************************************************************/
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36
  37 #include <vlc/vlc.h>
  38 #include <vlc/input.h>
  39
  40 #include "../../demux/mpeg/system.h"
  41
  42 #ifdef HAVE_UNISTD_H
  43 #   include <unistd.h>
  44 #endif
  45
  46 #include <fcntl.h>
  47 #include <sys/types.h>
  48 #include <sys/stat.h>
  49 #include <string.h>
  50 #include <errno.h>
  51
  52 #ifdef STRNCASECMP_IN_STRINGS_H
  53 #   include <strings.h>
  54 #endif
  55
  56 #ifdef GOD_DAMN_DMCA
  57 #   include "dvdcss.h"
  58 #else
  59 #   include <dvdcss/dvdcss.h>
  60 #endif
  61
  62 #include "dvd.h"
  63 #include "es.h"
  64 #include "seek.h"
  65 #include "ifo.h"
  66 #include "summary.h"
  67 #include "iso_lang.h"
  68
  69 /*****************************************************************************
  70  * Local prototypes
  71  *****************************************************************************/
  72
  73 /* called from outside */
  74 static int  DVDSetArea      ( input_thread_t *, input_area_t * );
  75 static int  DVDSetProgram   ( input_thread_t *, pgrm_descriptor_t * );
  76 static ssize_t DVDRead      ( input_thread_t *, byte_t *, size_t );
  77 static void DVDSeek         ( input_thread_t *, off_t );
  78
  79 static char * DVDParse( input_thread_t * );
  80
  81 /*
  82  * Data access functions
  83  */
  84
  85 #define DVDTell   LB2OFF( p_dvd->i_vts_start + p_dvd->i_vts_lb ) \
  86                   - p_input->stream.p_selected_area->i_start
  87
  88 /*****************************************************************************
  89  * DVDOpen: open dvd
  90  *****************************************************************************/
  91 int E_(DVDOpen) ( vlc_object_t *p_this )
  92 {
  93     input_thread_t *     p_input = (input_thread_t *)p_this;
  94     char *               psz_device;
  95     thread_dvd_data_t *  p_dvd;
  96     input_area_t *       p_area;
  97     int                  i;
  98     char *               psz_dvdcss_env;
  99
 100     p_dvd = malloc( sizeof(thread_dvd_data_t) );
 101     if( p_dvd == NULL )
 102     {
 103         msg_Err( p_input, "out of memory" );
 104         return -1;
 105     }
 106     p_input->p_access_data = (void *)p_dvd;
 107
 108     p_input->pf_read = DVDRead;
 109     p_input->pf_seek = DVDSeek;
 110     p_input->pf_set_area = DVDSetArea;
 111     p_input->pf_set_program = DVDSetProgram;
 112
 113     /* Parse command line */
 114     if( !( psz_device = DVDParse( p_input ) ) )
 115     {
 116         free( p_dvd );
 117         return -1;
 118     }
 119
 120     /*
 121      * set up input
 122      */
 123     p_input->i_mtu = 0;
 124
 125     /* override environment variable DVDCSS_METHOD with config option
 126      * (FIXME: this creates a small memory leak) */
 127     psz_dvdcss_env = config_GetPsz( p_input, "dvd-css-method" );
 128     if( psz_dvdcss_env && *psz_dvdcss_env )
 129     {
 130         char *psz_env;
 131
 132         psz_env = malloc( strlen("DVDCSS_METHOD=") +
 133                           strlen( psz_dvdcss_env ) + 1 );
 134
 135         if( !psz_env )
 136         {
 137             free( p_dvd );
 138             return -1;
 139         }
 140
 141         sprintf( psz_env, "%s%s", "DVDCSS_METHOD=", psz_dvdcss_env );
 142
 143         putenv( psz_env );
 144     }
 145     if( psz_dvdcss_env ) free( psz_dvdcss_env );
 146
 147     /*
 148      *  get plugin ready
 149      */
 150     p_dvd->dvdhandle = dvdcss_open( psz_device );
 151
 152     /* free allocated string */
 153     free( psz_device );
 154
 155     if( p_dvd->dvdhandle == NULL )
 156     {
 157         msg_Err( p_input, "dvdcss cannot open device" );
 158         free( p_dvd );
 159         return -1;
 160     }
 161
 162     if( dvdcss_seek( p_dvd->dvdhandle, 0, DVDCSS_NOFLAGS ) < 0 )
 163     {
 164         msg_Err( p_input, "%s", dvdcss_error( p_dvd->dvdhandle ) );
 165         dvdcss_close( p_dvd->dvdhandle );
 166         free( p_dvd );
 167         return -1;
 168     }
 169
 170     /* Ifo allocation & initialisation */
 171     if( IfoCreate( p_dvd ) < 0 )
 172     {
 173         msg_Err( p_input, "allcation error in ifo" );
 174         dvdcss_close( p_dvd->dvdhandle );
 175         free( p_dvd );
 176         return -1;
 177     }
 178
 179     if( IfoInit( p_dvd->p_ifo ) < 0 )
 180     {
 181         msg_Err( p_input, "fatal failure in ifo" );
 182         IfoDestroy( p_dvd->p_ifo );
 183         dvdcss_close( p_dvd->dvdhandle );
 184         free( p_dvd );
 185         return -1;
 186     }
 187
 188     /* Set stream and area data */
 189     vlc_mutex_lock( &p_input->stream.stream_lock );
 190
 191     p_input->stream.i_method = INPUT_METHOD_DVD;
 192     p_input->stream.b_pace_control = 1;
 193     p_input->stream.b_seekable = 1;
 194     p_input->stream.b_connected = 1;
 195     p_input->stream.p_selected_area->i_size = 0;
 196     p_input->stream.p_selected_area->i_tell = 0;
 197
 198     /* Initialize ES structures */
 199     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 200
 201 #define title_inf p_dvd->p_ifo->vmg.title_inf
 202     msg_Dbg( p_input, "number of titles: %d", title_inf.i_title_nb );
 203
 204 #define area p_input->stream.pp_areas
 205     /* We start from 1 here since the default area 0
 206      * is reserved for video_ts.vob */
 207     for( i = 1 ; i <= title_inf.i_title_nb ; i++ )
 208     {
 209         input_AddArea( p_input );
 210
 211         /* Titles are Program Chains */
 212         area[i]->i_id = i;
 213
 214         /* Absolute start offset and size
 215          * We can only set that with vts ifo, so we do it during the
 216          * first call to DVDSetArea */
 217         area[i]->i_start = 0;
 218         area[i]->i_size = 0;
 219
 220         /* Number of chapters */
 221         area[i]->i_part_nb = title_inf.p_attr[i-1].i_chapter_nb;
 222         area[i]->i_part = 1;
 223
 224         /* Offset to vts_i_0.ifo */
 225         area[i]->i_plugin_data = p_dvd->p_ifo->i_start +
 226                        title_inf.p_attr[i-1].i_start_sector;
 227     }
 228 #undef area
 229
 230     p_dvd->i_title = p_dvd->i_title <= title_inf.i_title_nb ?
 231                      p_dvd->i_title : 1;
 232 #undef title_inf
 233
 234     p_area = p_input->stream.pp_areas[p_dvd->i_title];
 235
 236     p_area->i_part = p_dvd->i_chapter <= p_area->i_part_nb ?
 237                      p_dvd->i_chapter : 1;
 238     p_dvd->i_chapter = 1;
 239
 240     p_dvd->b_new_chapter = 0;
 241     p_dvd->i_audio_nb = 0;
 242     p_dvd->i_spu_nb = 0;
 243
 244     /* set title, chapter, audio and subpic */
 245     if( DVDSetArea( p_input, p_area ) < 0 )
 246     {
 247         vlc_mutex_unlock( &p_input->stream.stream_lock );
 248         IfoDestroy( p_dvd->p_ifo );
 249         dvdcss_close( p_dvd->dvdhandle );
 250         free( p_dvd );
 251         return -1;
 252     }
 253
 254     vlc_mutex_unlock( &p_input->stream.stream_lock );
 255
 256     if( !p_input->psz_demux || !*p_input->psz_demux )
 257     {
 258         p_input->psz_demux = "dvdold";
 259     }
 260
 261     return 0;
 262 }
 263
 264 /*****************************************************************************
 265  * DVDClose: close dvd
 266  *****************************************************************************/
 267 void E_(DVDClose) ( vlc_object_t *p_this )
 268 {
 269     input_thread_t * p_input = (input_thread_t *)p_this;
 270     thread_dvd_data_t *p_dvd = (thread_dvd_data_t*)p_input->p_access_data;
 271
 272     /* This is a very nasty side-effect in the DVD plug-in : language
 273      * selection here influences language selection of other streams. So
 274      * unset those variables (may not be what the user wants).
 275      * FIXME FIXME FIXME FIXME FIXME FIXME FIXME --Meuuh */
 276     config_PutInt( p_input, "audio-channel", -1 );
 277     config_PutInt( p_input, "spu-channel", -1 );
 278
 279     IfoDestroy( p_dvd->p_ifo );
 280     dvdcss_close( p_dvd->dvdhandle );
 281     free( p_dvd );
 282 }
 283
 284 /*****************************************************************************
 285  * DVDSetProgram: used to change angle
 286  *****************************************************************************/
 287 static int DVDSetProgram( input_thread_t    * p_input,
 288                           pgrm_descriptor_t * p_program )
 289 {
 290     if( p_input->stream.p_selected_program != p_program )
 291     {
 292         thread_dvd_data_t *  p_dvd;
 293         int                  i_angle;
 294
 295         p_dvd   = (thread_dvd_data_t*)(p_input->p_access_data);
 296         i_angle = p_program->i_number;
 297
 298         /* DVD is actually mono-program: we only need the current angle
 299          * number, so copy the data between programs */
 300         memcpy( p_program,
 301                 p_input->stream.p_selected_program,
 302                 sizeof(pgrm_descriptor_t) );
 303         p_program->i_number                = i_angle;
 304         p_input->stream.p_selected_program = p_program;
 305
 306 #define title \
 307     p_dvd->p_ifo->vts.title_unit.p_title[p_dvd->i_title_id-1].title
 308         if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
 309         {
 310             if( ( p_program->i_number - p_dvd->i_angle ) < 0 )
 311             {
 312                 /* we have to go backwards */
 313                 p_dvd->i_map_cell = 0;
 314             }
 315             p_dvd->i_prg_cell += ( p_program->i_number - p_dvd->i_angle );
 316             p_dvd->i_map_cell =  CellPrg2Map( p_dvd );
 317             p_dvd->i_map_cell += p_dvd->i_angle_cell;
 318             p_dvd->i_vts_lb   =  CellFirstSector( p_dvd );
 319             p_dvd->i_last_lb  =  CellLastSector( p_dvd );
 320             p_dvd->i_angle    =  p_program->i_number;
 321         }
 322         else
 323         {
 324             p_dvd->i_angle    =  p_program->i_number;
 325         }
 326 #undef title
 327         msg_Dbg( p_input, "angle %d selected", p_dvd->i_angle );
 328     }
 329
 330     return 0;
 331 }
 332
 333 /*****************************************************************************
 334  * DVDSetArea: initialize input data for title x, chapter y.
 335  * It should be called for each user navigation request.
 336  *****************************************************************************
 337  * Take care that i_title starts from 0 (vmg) and i_chapter start from 1.
 338  * Note that you have to take the lock before entering here.
 339  *****************************************************************************/
 340 #define vmg p_dvd->p_ifo->vmg
 341 #define vts p_dvd->p_ifo->vts
 342
 343 static void DVDFlushStream( input_thread_t * p_input )
 344 {
 345     if( p_input->stream.pp_programs != NULL )
 346     {
 347         /* We don't use input_EndStream here since
 348          * we keep area structures */
 349         while( p_input->stream.i_es_number )
 350         {
 351             input_DelES( p_input, p_input->stream.pp_es[0] );
 352         }
 353
 354         while( p_input->stream.i_pgrm_number )
 355         {
 356             input_DelProgram( p_input, p_input->stream.pp_programs[0] );
 357         }
 358
 359         if( p_input->stream.pp_selected_es )
 360         {
 361             free( p_input->stream.pp_selected_es );
 362             p_input->stream.pp_selected_es = NULL;
 363         }
 364         p_input->stream.i_selected_es_number = 0;
 365     }
 366
 367     return;
 368 }
 369
 370 static int DVDReadAngle( input_thread_t * p_input )
 371 {
 372     thread_dvd_data_t * p_dvd;
 373     int                 i_angle_nb;
 374     int                 i;
 375
 376     p_dvd      = (thread_dvd_data_t*)(p_input->p_access_data);
 377     i_angle_nb = vmg.title_inf.p_attr[p_dvd->i_title-1].i_angle_nb;
 378
 379     input_AddProgram( p_input, 1, sizeof( stream_ps_data_t ) );
 380     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 381
 382     for( i = 1 ; i < i_angle_nb ; i++ )
 383     {
 384         input_AddProgram( p_input, i+1, 0 );
 385     }
 386
 387     return i_angle_nb;
 388 }
 389
 390 static int DVDSetArea( input_thread_t * p_input, input_area_t * p_area )
 391 {
 392     thread_dvd_data_t *  p_dvd;
 393
 394     p_dvd = (thread_dvd_data_t*)(p_input->p_access_data);
 395
 396     /* we can't use the interface slider until initilization is complete */
 397     p_input->stream.b_seekable = 0;
 398
 399     if( p_area != p_input->stream.p_selected_area )
 400     {
 401         int     i_vts_title;
 402         u32     i_first;
 403         u32     i_last;
 404
 405         /* Reset the Chapter position of the old title */
 406         p_input->stream.p_selected_area->i_part = 1;
 407         p_input->stream.p_selected_area         = p_area;
 408
 409         /*
 410          *  We have to load all title information
 411          */
 412
 413         /* title number as it appears in the interface list */
 414         p_dvd->i_title      = p_area->i_id;
 415         p_dvd->i_chapter_nb = p_area->i_part_nb;
 416
 417         if( IfoTitleSet( p_dvd->p_ifo, p_dvd->i_title ) < 0 )
 418         {
 419             msg_Err( p_input, "fatal error in vts ifo" );
 420             free( p_dvd );
 421             return -1;
 422         }
 423
 424         /* title position inside the selected vts */
 425         i_vts_title       = vmg.title_inf.p_attr[p_dvd->i_title-1].i_title_num;
 426         p_dvd->i_title_id =
 427             vts.title_inf.p_title_start[i_vts_title-1].i_title_id;
 428
 429         msg_Dbg( p_input, "title %d vts_title %d pgc %d",
 430                           p_dvd->i_title, i_vts_title, p_dvd->i_title_id );
 431
 432         /* title set offset XXX: convert to block values */
 433         p_dvd->i_vts_start =
 434             vts.i_pos + vts.manager_inf.i_title_vob_start_sector;
 435
 436         /* last cell */
 437         p_dvd->i_prg_cell = -1 +
 438             vts.title_unit.p_title[p_dvd->i_title_id-1].title.i_cell_nb;
 439         p_dvd->i_map_cell = 0;
 440         p_dvd->i_map_cell = CellPrg2Map( p_dvd );
 441         i_last            = CellLastSector( p_dvd );
 442
 443         /* first cell */
 444         p_dvd->i_prg_cell   = 0;
 445         p_dvd->i_map_cell   = 0;
 446         p_dvd->i_angle_cell = 0;
 447         p_dvd->i_map_cell   = CellPrg2Map    ( p_dvd );
 448         p_dvd->i_vts_lb     = CellFirstSector( p_dvd );
 449         p_dvd->i_last_lb    = CellLastSector ( p_dvd );
 450
 451         /* Force libdvdcss to check its title key.
 452          * It is only useful for title cracking method. Methods using the
 453          * decrypted disc key are fast enough to check the key at each seek */
 454         i_first = dvdcss_seek( p_dvd->dvdhandle,
 455                                p_dvd->i_vts_start + p_dvd->i_vts_lb,
 456                                DVDCSS_SEEK_KEY );
 457         if( i_first < 0 )
 458         {
 459             msg_Err( p_input, "%s", dvdcss_error( p_dvd->dvdhandle ) );
 460             return -1;
 461         }
 462
 463         /* Area definition */
 464         p_input->stream.p_selected_area->i_start = LB2OFF( i_first );
 465         p_input->stream.p_selected_area->i_size  =
 466                                         LB2OFF( i_last + 1 - p_dvd->i_vts_lb );
 467
 468         /* Destroy obsolete ES by reinitializing programs */
 469         DVDFlushStream( p_input );
 470
 471         /* Angle management: angles are handled through programs */
 472         p_dvd->i_angle_nb = DVDReadAngle( p_input );
 473         if( ( p_dvd->i_angle <= 0 ) || p_dvd->i_angle > p_dvd->i_angle_nb )
 474         {
 475             p_dvd->i_angle = 1;
 476         }
 477
 478         DVDSetProgram( p_input,
 479                        p_input->stream.pp_programs[p_dvd->i_angle-1] );
 480
 481         msg_Dbg( p_input, "title first %i, last %i, size %i",
 482                           i_first, i_last, i_last + 1 - p_dvd->i_vts_lb );
 483         IfoPrintTitle( p_dvd );
 484
 485         /* No PSM to read in DVD mode, we already have all information */
 486         p_input->stream.p_selected_program->b_is_ok = 1;
 487
 488         /* Find all ES in title with ifo data */
 489         DVDReadVideo( p_input );
 490         DVDReadAudio( p_input );
 491         DVDReadSPU  ( p_input );
 492
 493         if( p_input->p_demux )
 494         {
 495             DVDLaunchDecoders( p_input );
 496         }
 497
 498     } /* i_title >= 0 */
 499     else
 500     {
 501         p_area = p_input->stream.p_selected_area;
 502     }
 503
 504     /* Chapter selection */
 505     p_dvd->i_chapter = DVDSetChapter( p_dvd, p_area->i_part );
 506
 507     p_input->stream.p_selected_area->i_tell = DVDTell;
 508
 509     /* warn interface that something has changed */
 510     p_input->stream.b_seekable = 1;
 511     p_input->stream.b_changed  = 1;
 512
 513     return 0;
 514 }
 515 #undef vts
 516 #undef vmg
 517
 518 #define title \
 519     p_dvd->p_ifo->vts.title_unit.p_title[p_dvd->i_title_id-1].title
 520
 521 /*****************************************************************************
 522  * DVDRead: reads data packets.
 523  *****************************************************************************
 524  * Returns -1 in case of error, 0 in case of EOF, otherwise the number of
 525  * bytes.
 526  *****************************************************************************/
 527 static ssize_t DVDRead( input_thread_t * p_input,
 528                         byte_t * p_buffer, size_t i_count )
 529 {
 530     thread_dvd_data_t *     p_dvd;
 531     int                     i_read;
 532     int                     i_blocks;
 533     int                     i_block_once = 0;
 534
 535     p_dvd = (thread_dvd_data_t *)(p_input->p_access_data);
 536
 537     i_read = 0;
 538     i_blocks = OFF2LB(i_count);
 539
 540     while( i_blocks )
 541     {
 542         i_block_once = LbMaxOnce( p_dvd );
 543         if( i_block_once > i_blocks )
 544         {
 545             i_block_once = i_blocks;
 546         }
 547         else if( i_block_once <= 0 )
 548         {
 549             /* EOT */
 550             break;
 551         }
 552
 553         if( i_block_once != dvdcss_read( p_dvd->dvdhandle, p_buffer,
 554                                          i_block_once, DVDCSS_READ_DECRYPT ) )
 555         {
 556             return -1;
 557         }
 558
 559         i_blocks -= i_block_once;
 560         i_read += i_block_once;
 561         p_buffer += LB2OFF( i_block_once );
 562
 563         /* Update global position */
 564         p_dvd->i_vts_lb += i_block_once;
 565     }
 566
 567     vlc_mutex_lock( &p_input->stream.stream_lock );
 568
 569     if( p_dvd->b_new_chapter )
 570     {
 571         p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 572         p_dvd->b_new_chapter                    = 0;
 573     }
 574
 575     if( ( p_input->stream.p_selected_area->i_tell + LB2OFF( i_read )
 576             >= p_input->stream.p_selected_area->i_size )
 577        || ( i_block_once  <= 0 ) )
 578     {
 579         if( ( p_dvd->i_title + 1 ) >= p_input->stream.i_area_nb )
 580         {
 581             /* EOF */
 582             vlc_mutex_unlock( &p_input->stream.stream_lock );
 583             return 0;
 584         }
 585
 586         /* EOT */
 587         msg_Dbg( p_input, "new title" );
 588         p_dvd->i_title++;
 589         DVDSetArea( p_input, p_input->stream.pp_areas[p_dvd->i_title] );
 590     }
 591
 592     vlc_mutex_unlock( &p_input->stream.stream_lock );
 593
 594     return LB2OFF( i_read );
 595 }
 596
 597 /*****************************************************************************
 598  * DVDSeek : Goes to a given position on the stream.
 599  *****************************************************************************
 600  * This one is used by the input and translate chronological position from
 601  * input to logical position on the device.
 602  * The lock should be taken before calling this function.
 603  *****************************************************************************/
 604 static void DVDSeek( input_thread_t * p_input, off_t i_off )
 605 {
 606     thread_dvd_data_t *     p_dvd;
 607
 608     p_dvd = ( thread_dvd_data_t * )(p_input->p_access_data);
 609
 610     vlc_mutex_lock( &p_input->stream.stream_lock );
 611     p_dvd->i_vts_lb = OFF2LB(i_off + p_input->stream.p_selected_area->i_start)
 612                        - p_dvd->i_vts_start;
 613     vlc_mutex_unlock( &p_input->stream.stream_lock );
 614
 615     p_dvd->i_prg_cell = Lb2CellPrg( p_dvd );
 616     p_dvd->i_map_cell = Lb2CellMap( p_dvd );
 617
 618     if( CellIsInterleaved( p_dvd ) )
 619     {
 620         /* if we're inside a multi-angle zone, we have to choose i_sector
 621          * in the current angle ; we can't do it all the time since cells
 622          * can be very wide out of such zones */
 623         p_dvd->i_vts_lb = CellFirstSector( p_dvd );
 624     }
 625
 626     p_dvd->i_last_lb  = CellLastSector( p_dvd );
 627     p_dvd->i_chapter  = CellPrg2Chapter( p_dvd );
 628
 629     if( dvdcss_seek( p_dvd->dvdhandle, p_dvd->i_vts_start + p_dvd->i_vts_lb,
 630                      DVDCSS_SEEK_MPEG ) < 0 )
 631     {
 632         msg_Err( p_input, "%s", dvdcss_error( p_dvd->dvdhandle ) );
 633         p_input->b_error = 1;
 634         return;
 635     }
 636
 637     vlc_mutex_lock( &p_input->stream.stream_lock );
 638     p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 639     p_input->stream.p_selected_area->i_tell = DVDTell;
 640     vlc_mutex_unlock( &p_input->stream.stream_lock );
 641
 642     msg_Dbg( p_input, "program cell: %d cell: %d chapter: %d tell "I64Fd,
 643              p_dvd->i_prg_cell, p_dvd->i_map_cell, p_dvd->i_chapter, DVDTell );
 644
 645     return;
 646 }
 647
 648 /*****************************************************************************
 649  * DVDParse: parse command line
 650  *****************************************************************************/
 651 static char * DVDParse( input_thread_t * p_input )
 652 {
 653     thread_dvd_data_t *  p_dvd;
 654     struct stat          stat_info;
 655     char *               psz_parser;
 656     char *               psz_device;
 657     char *               psz_raw;
 658     char *               psz_next;
 659     vlc_bool_t           b_options = 0;
 660     int                  i_title = 1;
 661     int                  i_chapter = 1;
 662     int                  i_angle = 1;
 663     int                  i;
 664
 665     p_dvd = (thread_dvd_data_t*)(p_input->p_access_data);
 666
 667 #ifdef WIN32
 668     /* On Win32 we want the DVD access plugin to be explicitly requested,
 669      * we end up with lots of problems otherwise */
 670     if( !p_input->psz_access || !*p_input->psz_access ) return NULL;
 671 #endif
 672
 673     psz_parser = psz_device = strdup( p_input->psz_name );
 674     if( !psz_parser )
 675     {
 676         return NULL;
 677     }
 678
 679     /* Parse input string :
 680      * [device][@rawdevice][@[title][,[chapter][,angle]]] */
 681     while( *psz_parser && *psz_parser != '@' )
 682     {
 683         psz_parser++;
 684     }
 685
 686     if( *psz_parser == '@' )
 687     {
 688         /* Maybe found raw device or option list */
 689         *psz_parser = '\0';
 690         psz_raw = ++psz_parser;
 691     }
 692     else
 693     {
 694         psz_raw = "";
 695     }
 696
 697     if( *psz_parser && !strtol( psz_parser, NULL, 10 ) )
 698     {
 699         /* what we've found is either a raw device or a partial option
 700          * list e.g. @,29 or both a device and a list ; search end of string */
 701         while( *psz_parser && *psz_parser != '@' )
 702         {
 703             psz_parser++;
 704         }
 705
 706         if( *psz_parser == '@' )
 707         {
 708             /* found end of raw device, and beginning of options */
 709             *psz_parser = '\0';
 710             ++psz_parser;
 711             b_options = 1;
 712         }
 713         else
 714         {
 715             psz_parser = psz_raw + 1;
 716             for( i=0 ; i<3 ; i++ )
 717             {
 718                 if( !*psz_parser )
 719                 {
 720                     /* we have only a raw device */
 721                     break;
 722                 }
 723                 if( strtol( psz_parser, NULL, 10 ) )
 724                 {
 725                     /* we have only a partial list of options, no device */
 726                     psz_parser = psz_raw;
 727                     psz_raw = "";
 728                     b_options = 1;
 729                     break;
 730                 }
 731                 psz_parser++;
 732             }
 733         }
 734     }
 735     else
 736     {
 737         /* found beginning of options ; no raw device specified */
 738         psz_raw = "";
 739         b_options = 1;
 740     }
 741
 742     if( b_options )
 743     {
 744         /* Found options */
 745         i_title = (int)strtol( psz_parser, &psz_next, 10 );
 746         if( *psz_next )
 747         {
 748             psz_parser = psz_next + 1;
 749             i_chapter = (int)strtol( psz_parser, &psz_next, 10 );
 750             if( *psz_next )
 751             {
 752                 i_angle = (int)strtol( psz_next + 1, NULL, 10 );
 753             }
 754         }
 755
 756         p_dvd->i_title = i_title ? i_title : 1;
 757         p_dvd->i_chapter = i_chapter ? i_chapter : 1;
 758         p_dvd->i_angle = i_angle ? i_angle : 1;
 759     }
 760
 761     if( *psz_raw )
 762     {
 763         if( *psz_raw )
 764         {
 765             /* check the raw device */
 766             if( stat( psz_raw, &stat_info ) == -1 )
 767             {
 768                 msg_Warn( p_input, "cannot stat() raw device `%s' (%s)",
 769                                    psz_raw, strerror(errno));
 770                 /* put back '@' */
 771                 *(psz_raw - 1) = '@';
 772                 psz_raw = "";
 773             }
 774             else
 775             {
 776                 char * psz_env;
 777
 778 #ifndef WIN32
 779                 if( !S_ISCHR(stat_info.st_mode) )
 780                 {
 781                     msg_Warn( p_input, "raw device %s is"
 782                               " not a valid char device", psz_raw );
 783                     /* put back '@' */
 784                     *(psz_raw - 1) = '@';
 785                     psz_raw = "";
 786                 }
 787                 else
 788 #endif
 789                 {
 790                     psz_env = malloc( strlen("DVDCSS_RAW_DEVICE=")
 791                                     + strlen( psz_raw ) + 1 );
 792                     sprintf( psz_env, "DVDCSS_RAW_DEVICE=%s", psz_raw );
 793                     putenv( psz_env );
 794                 }
 795             }
 796         }
 797         else
 798         {
 799             psz_raw = "";
 800         }
 801     }
 802
 803     if( !*psz_device )
 804     {
 805         free( psz_device );
 806
 807         if( !p_input->psz_access )
 808         {
 809             /* no device and no access specified: we probably don't want DVD */
 810             return NULL;
 811         }
 812         psz_device = config_GetPsz( p_input, "dvd" );
 813     }
 814
 815 #ifndef WIN32
 816     /* check block device */
 817     if( stat( psz_device, &stat_info ) == -1 )
 818     {
 819         msg_Err( p_input, "cannot stat() device `%s' (%s)",
 820                           psz_device, strerror(errno));
 821         free( psz_device );
 822         return NULL;
 823     }
 824
 825     if( !S_ISBLK(stat_info.st_mode) && !S_ISCHR(stat_info.st_mode) )
 826     {
 827         msg_Warn( p_input,
 828                   "dvd module discarded (not a valid block device)" );
 829         free( psz_device );
 830         return NULL;
 831     }
 832 #endif
 833
 834     msg_Dbg( p_input, "dvd=%s raw=%s title=%d chapter=%d angle=%d",
 835                       psz_device, psz_raw, p_dvd->i_title,
 836                       p_dvd->i_chapter, p_dvd->i_angle );
 837
 838     return psz_device;
 839 }