git.sesse.net Git - vlc/blob - plugins/dvd/dvd_access.c

   1 /* dvd_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  *  -dvd_ifo for ifo parsing and analyse
   8  *  -dvd_udf to find files
   9  *****************************************************************************
  10  * Copyright (C) 1998-2001 VideoLAN
  11  * $Id: dvd_access.c,v 1.3 2002/03/08 22:58:12 stef 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 <videolan/vlc.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 #include <errno.h>
  48
  49 #ifdef STRNCASECMP_IN_STRINGS_H
  50 #   include <strings.h>
  51 #endif
  52
  53 #ifdef GOD_DAMN_DMCA
  54 #   include "dummy_dvdcss.h"
  55 #else
  56 #   include <videolan/dvdcss.h>
  57 #endif
  58
  59 #include "stream_control.h"
  60 #include "input_ext-intf.h"
  61 #include "input_ext-dec.h"
  62 #include "input_ext-plugins.h"
  63
  64 #include "dvd.h"
  65 #include "dvd_es.h"
  66 #include "dvd_seek.h"
  67 #include "dvd_ifo.h"
  68 #include "dvd_summary.h"
  69 #include "iso_lang.h"
  70
  71 #include "debug.h"
  72
  73 /*****************************************************************************
  74  * Local prototypes
  75  *****************************************************************************/
  76
  77 /* called from outside */
  78 static int  DVDOpen         ( struct input_thread_s * );
  79 static void DVDClose        ( struct input_thread_s * );
  80 static int  DVDSetArea      ( struct input_thread_s *, struct input_area_s * );
  81 static int  DVDSetProgram   ( struct input_thread_s *, pgrm_descriptor_t * );
  82 static int  DVDRead         ( struct input_thread_s *, byte_t *, size_t );
  83 static void DVDSeek         ( struct input_thread_s *, off_t );
  84
  85 static char * DVDParse( input_thread_t * );
  86
  87 /*****************************************************************************
  88  * Functions exported as capabilities. They are declared as static so that
  89  * we don't pollute the namespace too much.
  90  *****************************************************************************/
  91 void _M( access_getfunctions)( function_list_t * p_function_list )
  92 {
  93 #define input p_function_list->functions.access
  94     input.pf_open             = DVDOpen;
  95     input.pf_close            = DVDClose;
  96     input.pf_read             = DVDRead;
  97     input.pf_set_area         = DVDSetArea;
  98     input.pf_set_program      = DVDSetProgram;
  99     input.pf_seek             = DVDSeek;
 100 #undef input
 101 }
 102
 103 /*
 104  * Data access functions
 105  */
 106
 107 #define DVDLB     p_dvd->i_vts_start + p_dvd->i_vts_lb
 108 #define DVDTell   LB2OFF( p_dvd->i_vts_start + p_dvd->i_vts_lb ) \
 109                   - p_input->stream.p_selected_area->i_start
 110
 111 /*****************************************************************************
 112  * DVDOpen: open dvd
 113  *****************************************************************************/
 114 static int DVDOpen( struct input_thread_s *p_input )
 115 {
 116     char *               psz_device;
 117     dvdcss_handle        dvdhandle;
 118     thread_dvd_data_t *  p_dvd;
 119     input_area_t *       p_area;
 120     int                  i;
 121
 122     p_dvd = malloc( sizeof(thread_dvd_data_t) );
 123     if( p_dvd == NULL )
 124     {
 125         intf_ErrMsg( "dvd error: out of memory" );
 126         return -1;
 127     }
 128     p_input->p_access_data = (void *)p_dvd;
 129
 130     /* Parse command line */
 131     if( !( psz_device = DVDParse( p_input ) ) )
 132     {
 133         free( p_dvd );
 134         return -1;
 135     }
 136
 137     /*
 138      * set up input
 139      */
 140     p_input->i_mtu = 0;
 141
 142     /*
 143      *  get plugin ready
 144      */
 145     dvdhandle = dvdcss_open( psz_device );
 146
 147     /* free allocated string */
 148     free( psz_device );
 149
 150
 151     if( dvdhandle == NULL )
 152     {
 153         intf_ErrMsg( "dvd error: dvdcss can't open device" );
 154         return -1;
 155     }
 156
 157     p_dvd->dvdhandle = (dvdcss_handle) dvdhandle;
 158
 159     if( dvdcss_seek( p_dvd->dvdhandle, 0, DVDCSS_NOFLAGS ) < 0 )
 160     {
 161         intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
 162         return -1;
 163     }
 164
 165     /* Ifo allocation & initialisation */
 166     if( IfoCreate( p_dvd ) < 0 )
 167     {
 168         intf_ErrMsg( "dvd error: allcation error in ifo" );
 169         free( p_dvd );
 170         return -1;
 171     }
 172
 173     if( IfoInit( p_dvd->p_ifo ) < 0 )
 174     {
 175         intf_ErrMsg( "dvd error: fatal failure in ifo" );
 176         IfoDestroy( p_dvd->p_ifo );
 177         free( p_dvd );
 178         return -1;
 179     }
 180
 181     /* Set stream and area data */
 182     vlc_mutex_lock( &p_input->stream.stream_lock );
 183
 184     p_input->stream.i_method = INPUT_METHOD_DVD;
 185     p_input->stream.b_pace_control = 1;
 186     p_input->stream.b_seekable = 1;
 187     p_input->stream.p_selected_area->i_size = 0;
 188     p_input->stream.p_selected_area->i_tell = 0;
 189
 190     /* Initialize ES structures */
 191     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 192
 193 #define title_inf p_dvd->p_ifo->vmg.title_inf
 194     intf_WarnMsg( 3, "dvd info: number of titles: %d", title_inf.i_title_nb );
 195
 196 #define area p_input->stream.pp_areas
 197     /* We start from 1 here since the default area 0
 198      * is reserved for video_ts.vob */
 199     for( i = 1 ; i <= title_inf.i_title_nb ; i++ )
 200     {
 201         input_AddArea( p_input );
 202
 203         /* Titles are Program Chains */
 204         area[i]->i_id = i;
 205
 206         /* Absolute start offset and size
 207          * We can only set that with vts ifo, so we do it during the
 208          * first call to DVDSetArea */
 209         area[i]->i_start = 0;
 210         area[i]->i_size = 0;
 211
 212         /* Number of chapters */
 213         area[i]->i_part_nb = title_inf.p_attr[i-1].i_chapter_nb;
 214         area[i]->i_part = 1;
 215
 216         /* Offset to vts_i_0.ifo */
 217         area[i]->i_plugin_data = p_dvd->p_ifo->i_start +
 218                        title_inf.p_attr[i-1].i_start_sector;
 219     }
 220 #undef area
 221
 222     p_dvd->i_title = p_dvd->i_title <= title_inf.i_title_nb ?
 223                      p_dvd->i_title : 1;
 224 #undef title_inf
 225
 226     p_area = p_input->stream.pp_areas[p_dvd->i_title];
 227
 228     p_dvd->i_chapter = p_dvd->i_chapter <= p_area->i_part_nb ?
 229                        p_dvd->i_chapter : 1;
 230     p_area->i_part = p_dvd->i_chapter;
 231
 232     p_dvd->b_new_chapter = 0;
 233     p_dvd->i_audio_nb = 0;
 234     p_dvd->i_spu_nb = 0;
 235
 236     /* set title, chapter, audio and subpic */
 237     if( DVDSetArea( p_input, p_area ) < 0 )
 238     {
 239         vlc_mutex_unlock( &p_input->stream.stream_lock );
 240         return -1;
 241     }
 242
 243     vlc_mutex_unlock( &p_input->stream.stream_lock );
 244
 245     p_input->psz_demux = "dvd";
 246
 247     return 0;
 248 }
 249
 250 /*****************************************************************************
 251  * DVDClose: close dvd
 252  *****************************************************************************/
 253 static void DVDClose( struct input_thread_s *p_input )
 254 {
 255     thread_dvd_data_t *     p_dvd;
 256
 257     p_dvd = (thread_dvd_data_t*)p_input->p_access_data;
 258
 259     IfoDestroy( p_dvd->p_ifo );
 260
 261     p_input->p_access_data = (void *)(p_dvd->dvdhandle);
 262     free( p_dvd );
 263
 264     /* Clean up libdvdcss */
 265     dvdcss_close( (dvdcss_handle) p_input->p_access_data );
 266 }
 267
 268 /*****************************************************************************
 269  * DVDSetProgram: used to change angle
 270  *****************************************************************************/
 271 static int DVDSetProgram( input_thread_t    * p_input,
 272                           pgrm_descriptor_t * p_program )
 273 {
 274     if( p_input->stream.p_selected_program != p_program )
 275     {
 276         thread_dvd_data_t *  p_dvd;
 277         int                  i_angle;
 278
 279         p_dvd   = (thread_dvd_data_t*)(p_input->p_access_data);
 280         i_angle = p_program->i_number;
 281
 282         /* DVD is actually mono-program: we only need the current angle
 283          * number, so copy the data between programs */
 284         memcpy( p_program,
 285                 p_input->stream.p_selected_program,
 286                 sizeof(pgrm_descriptor_t) );
 287         p_program->i_number                = i_angle;
 288         p_input->stream.p_selected_program = p_program;
 289
 290 #define title \
 291     p_dvd->p_ifo->vts.title_unit.p_title[p_dvd->i_title_id-1].title
 292         if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
 293         {
 294             if( ( p_program->i_number - p_dvd->i_angle ) < 0 )
 295             {
 296                 /* we have to go backwards */
 297                 p_dvd->i_map_cell = 0;
 298             }
 299             p_dvd->i_prg_cell += ( p_program->i_number - p_dvd->i_angle );
 300             p_dvd->i_map_cell =  CellPrg2Map( p_dvd );
 301             p_dvd->i_map_cell += p_dvd->i_angle_cell;
 302             p_dvd->i_vts_lb   =  CellStartSector( p_dvd );
 303             p_dvd->i_end_lb   =  CellEndSector( p_dvd );
 304             p_dvd->i_angle    =  p_program->i_number;
 305         }
 306         else
 307         {
 308             p_dvd->i_angle    =  p_program->i_number;
 309         }
 310 #undef title
 311         intf_WarnMsg( 3, "dvd info: angle %d selected", p_dvd->i_angle );
 312     }
 313
 314     return 0;
 315 }
 316
 317 /*****************************************************************************
 318  * DVDSetArea: initialize input data for title x, chapter y.
 319  * It should be called for each user navigation request.
 320  *****************************************************************************
 321  * Take care that i_title starts from 0 (vmg) and i_chapter start from 1.
 322  * Note that you have to take the lock before entering here.
 323  *****************************************************************************/
 324 #define vmg p_dvd->p_ifo->vmg
 325 #define vts p_dvd->p_ifo->vts
 326
 327 static void DVDFlushStream( input_thread_t * p_input )
 328 {
 329     if( p_input->stream.pp_programs != NULL )
 330     {
 331         /* We don't use input_EndStream here since
 332          * we keep area structures */
 333         while( p_input->stream.i_es_number )
 334         {
 335             input_DelES( p_input, p_input->stream.pp_es[0] );
 336         }
 337
 338         while( p_input->stream.i_pgrm_number )
 339         {
 340             input_DelProgram( p_input, p_input->stream.pp_programs[0] );
 341         }
 342
 343         if( p_input->stream.pp_selected_es )
 344         {
 345             free( p_input->stream.pp_selected_es );
 346             p_input->stream.pp_selected_es = NULL;
 347         }
 348         p_input->stream.i_selected_es_number = 0;
 349     }
 350
 351     return;
 352 }
 353
 354 static int DVDReadAngle( input_thread_t * p_input )
 355 {
 356     thread_dvd_data_t * p_dvd;
 357     int                 i_angle_nb;
 358     int                 i;
 359
 360     p_dvd      = (thread_dvd_data_t*)(p_input->p_access_data);
 361     i_angle_nb = vmg.title_inf.p_attr[p_dvd->i_title-1].i_angle_nb;
 362
 363     input_AddProgram( p_input, 1, sizeof( stream_ps_data_t ) );
 364     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 365
 366     for( i = 1 ; i < i_angle_nb ; i++ )
 367     {
 368         input_AddProgram( p_input, i+1, 0 );
 369     }
 370
 371     return i_angle_nb;
 372 }
 373
 374 static int DVDSetArea( input_thread_t * p_input, input_area_t * p_area )
 375 {
 376     thread_dvd_data_t *  p_dvd;
 377
 378     p_dvd = (thread_dvd_data_t*)(p_input->p_access_data);
 379
 380     /* we can't use the interface slider until initilization is complete */
 381     p_input->stream.b_seekable = 0;
 382
 383     if( p_area != p_input->stream.p_selected_area )
 384     {
 385         int     i_vts_title;
 386         u32     i_start;
 387         u32     i_size;
 388
 389         /* Reset the Chapter position of the old title */
 390         p_input->stream.p_selected_area->i_part = 1;
 391         p_input->stream.p_selected_area         = p_area;
 392
 393         /*
 394          *  We have to load all title information
 395          */
 396
 397         /* title number as it appears in the interface list */
 398         p_dvd->i_title      = p_area->i_id;
 399         p_dvd->i_chapter_nb = p_area->i_part_nb;
 400
 401         if( IfoTitleSet( p_dvd->p_ifo, p_dvd->i_title ) < 0 )
 402         {
 403             intf_ErrMsg( "dvd error: fatal error in vts ifo" );
 404             free( p_dvd );
 405             return -1;
 406         }
 407
 408         /* title position inside the selected vts */
 409         i_vts_title       = vmg.title_inf.p_attr[p_dvd->i_title-1].i_title_num;
 410         p_dvd->i_title_id =
 411             vts.title_inf.p_title_start[i_vts_title-1].i_title_id;
 412
 413         intf_WarnMsg( 3, "dvd: title %d vts_title %d pgc %d",
 414                       p_dvd->i_title, i_vts_title, p_dvd->i_title_id );
 415
 416         /* title set offset XXX: convert to block values */
 417         p_dvd->i_vts_start =
 418             vts.i_pos + vts.manager_inf.i_title_vob_start_sector;
 419
 420         /* last cell */
 421         intf_WarnMsg( 4, "prg_cell nb %d", vts.title_unit.p_title[p_dvd->i_title_id-1].title.i_cell_nb );
 422         p_dvd->i_prg_cell = -1 +
 423             vts.title_unit.p_title[p_dvd->i_title_id-1].title.i_cell_nb;
 424         p_dvd->i_map_cell = 0;
 425         p_dvd->i_map_cell = CellPrg2Map( p_dvd );
 426         i_size            = CellEndSector( p_dvd );
 427
 428         /* first cell */
 429         p_dvd->i_prg_cell = 0;
 430         p_dvd->i_map_cell = 0;
 431         p_dvd->i_map_cell = CellPrg2Map    ( p_dvd );
 432         p_dvd->i_vts_lb   = CellStartSector( p_dvd );
 433         p_dvd->i_end_lb   = CellEndSector  ( p_dvd );
 434
 435         /* Force libdvdcss to check its title key.
 436          * It is only useful for title cracking method. Methods using the
 437          * decrypted disc key are fast enough to check the key at each seek */
 438         if( ( i_start = dvdcss_seek( p_dvd->dvdhandle, DVDLB,
 439                                      DVDCSS_SEEK_KEY ) ) < 0 )
 440         {
 441             intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
 442             return -1;
 443         }
 444
 445         i_size -= p_dvd->i_vts_lb + 1;
 446
 447         /* Area definition */
 448         p_input->stream.p_selected_area->i_start = LB2OFF( i_start );
 449         p_input->stream.p_selected_area->i_size  = LB2OFF( i_size );
 450
 451         /* Destroy obsolete ES by reinitializing programs */
 452         DVDFlushStream( p_input );
 453
 454         /* Angle management: angles are handled through programs */
 455         p_dvd->i_angle_nb = DVDReadAngle( p_input );
 456         if( ( p_dvd->i_angle <= 0 ) || p_dvd->i_angle > p_dvd->i_angle_nb )
 457         {
 458             p_dvd->i_angle = 1;
 459         }
 460
 461         DVDSetProgram( p_input,
 462                        p_input->stream.pp_programs[p_dvd->i_angle-1] );
 463
 464         intf_WarnMsg( 3, "dvd info: title start: %d size: %d",
 465                          i_start, i_size );
 466         IfoPrintTitle( p_dvd );
 467
 468         /* No PSM to read in DVD mode, we already have all information */
 469         p_input->stream.p_selected_program->b_is_ok = 1;
 470
 471         /* Find all ES in title with ifo data */
 472         DVDReadVideo( p_input );
 473         DVDReadAudio( p_input );
 474         DVDReadSPU  ( p_input );
 475
 476         if( p_input->p_demux_module )
 477         {
 478             DVDLaunchDecoders( p_input );
 479         }
 480
 481     } /* i_title >= 0 */
 482     else
 483     {
 484         p_area = p_input->stream.p_selected_area;
 485     }
 486
 487     /* Chapter selection */
 488     p_dvd->i_chapter = DVDSetChapter( p_dvd, p_area->i_part );
 489
 490     p_input->stream.p_selected_area->i_tell = DVDTell;
 491
 492     /* warn interface that something has changed */
 493     p_input->stream.b_seekable = 1;
 494     p_input->stream.b_changed  = 1;
 495
 496     return 0;
 497 }
 498 #undef vts
 499 #undef vmg
 500
 501 #define title \
 502     p_dvd->p_ifo->vts.title_unit.p_title[p_dvd->i_title_id-1].title
 503
 504 /*****************************************************************************
 505  * DVDRead: reads data packets.
 506  *****************************************************************************
 507  * Returns -1 in case of error, 0 in case of EOF, otherwise the number of
 508  * bytes.
 509  *****************************************************************************/
 510 static int DVDRead( input_thread_t * p_input,
 511                     byte_t * p_buffer, size_t i_count )
 512 {
 513     thread_dvd_data_t *     p_dvd;
 514     int                     i_read;
 515     int                     i_blocks;
 516     int                     i_block_once = 0;
 517
 518     p_dvd = (thread_dvd_data_t *)(p_input->p_access_data);
 519
 520     i_read = 0;
 521     i_blocks = OFF2LB(i_count);
 522
 523     while( i_blocks )
 524     {
 525         if( ( i_block_once = __MIN( LbMaxOnce( p_dvd ), i_blocks ) ) <= 0 )
 526         {
 527             /* EOT */
 528             break;
 529         }
 530
 531         if( i_block_once != dvdcss_read( p_dvd->dvdhandle, p_buffer,
 532                                          i_block_once, DVDCSS_READ_DECRYPT ) )
 533         {
 534             return -1;
 535         }
 536
 537         i_blocks -= i_block_once;
 538         i_read += i_block_once;
 539         p_buffer += LB2OFF( i_block_once );
 540
 541         /* Update global position */
 542         p_dvd->i_vts_lb += i_block_once;
 543     }
 544
 545     vlc_mutex_lock( &p_input->stream.stream_lock );
 546
 547     p_input->stream.p_selected_area->i_tell += LB2OFF( i_read );
 548     if( p_dvd->b_new_chapter )
 549     {
 550         p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 551         p_dvd->b_new_chapter                    = 0;
 552     }
 553
 554     if( ( p_input->stream.p_selected_area->i_tell
 555             >= p_input->stream.p_selected_area->i_size )
 556        || ( i_block_once  < 0 ) )
 557     {
 558         if( ( p_dvd->i_title + 1 ) >= p_input->stream.i_area_nb )
 559         {
 560             /* EOF */
 561             vlc_mutex_unlock( &p_input->stream.stream_lock );
 562             return 0;
 563         }
 564
 565         /* EOT */
 566         intf_WarnMsg( 4, "dvd info: new title" );
 567         p_dvd->i_title++;
 568         DVDSetArea( p_input, p_input->stream.pp_areas[p_dvd->i_title] );
 569     }
 570
 571     vlc_mutex_unlock( &p_input->stream.stream_lock );
 572
 573     return LB2OFF( i_read );
 574 }
 575
 576 /*****************************************************************************
 577  * DVDSeek : Goes to a given position on the stream.
 578  *****************************************************************************
 579  * This one is used by the input and translate chronological position from
 580  * input to logical position on the device.
 581  * The lock should be taken before calling this function.
 582  *****************************************************************************/
 583 static void DVDSeek( input_thread_t * p_input, off_t i_off )
 584 {
 585     thread_dvd_data_t *     p_dvd;
 586
 587     p_dvd = ( thread_dvd_data_t * )(p_input->p_access_data);
 588
 589     vlc_mutex_lock( &p_input->stream.stream_lock );
 590     p_dvd->i_vts_lb = OFF2LB(i_off + p_input->stream.p_selected_area->i_start)
 591                        - p_dvd->i_vts_start;
 592     vlc_mutex_unlock( &p_input->stream.stream_lock );
 593
 594     p_dvd->i_prg_cell = Lb2CellPrg( p_dvd );
 595     p_dvd->i_map_cell = Lb2CellMap( p_dvd );
 596
 597     if( CellIsInterleaved( p_dvd ) )
 598     {
 599         /* if we're inside a multi-angle zone, we have to choose i_sector
 600          * in the current angle ; we can't do it all the time since cells
 601          * can be very wide out of such zones */
 602         p_dvd->i_vts_lb = CellStartSector( p_dvd );
 603     }
 604
 605     p_dvd->i_end_lb   = CellEndSector  ( p_dvd );
 606     p_dvd->i_chapter  = CellPrg2Chapter( p_dvd );
 607
 608     if( dvdcss_seek( p_dvd->dvdhandle, DVDLB,
 609                      DVDCSS_SEEK_MPEG ) < 0 )
 610     {
 611         intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
 612         p_input->b_error = 1;
 613         return;
 614     }
 615
 616     vlc_mutex_lock( &p_input->stream.stream_lock );
 617     p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 618     p_input->stream.p_selected_area->i_tell = DVDTell;
 619     vlc_mutex_unlock( &p_input->stream.stream_lock );
 620
 621     intf_WarnMsg( 4, "Program Cell: %d Cell: %d Chapter: %d tell %lld",
 622                      p_dvd->i_prg_cell, p_dvd->i_map_cell, p_dvd->i_chapter, DVDTell );
 623
 624     return;
 625 }
 626
 627 /*****************************************************************************
 628  * DVDParse: parse command line
 629  *****************************************************************************/
 630 static char * DVDParse( input_thread_t * p_input )
 631 {
 632     thread_dvd_data_t *  p_dvd;
 633     struct stat          stat_info;
 634     char *               psz_parser;
 635     char *               psz_device;
 636     char *               psz_raw;
 637     char *               psz_next;
 638     boolean_t            b_options = 0;
 639     int                  i_title = 1;
 640     int                  i_chapter = 1;
 641     int                  i_angle = 1;
 642     int                  i;
 643
 644     p_dvd = (thread_dvd_data_t*)(p_input->p_access_data);
 645
 646     psz_parser = psz_device = strdup( p_input->psz_name );
 647     if( !psz_parser )
 648     {
 649         return NULL;
 650     }
 651
 652     /* Parse input string :
 653      * [device][@rawdevice][@[title][,[chapter][,angle]]] */
 654     while( *psz_parser && *psz_parser != '@' )
 655     {
 656         psz_parser++;
 657     }
 658
 659     if( *psz_parser == '@' )
 660     {
 661         /* Maybe found raw device or option list */
 662         *psz_parser = '\0';
 663         psz_raw = ++psz_parser;
 664     }
 665     else
 666     {
 667         psz_raw = NULL;
 668     }
 669
 670     if( *psz_parser && !strtol( psz_parser, NULL, 10 ) )
 671     {
 672         /* what we've found is either a raw device or a partial option
 673          * list e.g. @,29 or both a device and a list ; search end of string */
 674         while( *psz_parser && *psz_parser != '@' )
 675         {
 676             psz_parser++;
 677         }
 678
 679         if( *psz_parser == '@' )
 680         {
 681             /* found end of raw device, and beginning of options */
 682             *psz_parser = '\0';
 683             ++psz_parser;
 684             b_options = 1;
 685         }
 686         else
 687         {
 688             psz_parser = psz_raw + 1;
 689             for( i=0 ; i<3 ; i++ )
 690             {
 691                 if( !*psz_parser )
 692                 {
 693                     /* we have only a raw device */
 694                     break;
 695                 }
 696                 if( strtol( psz_parser, NULL, 10 ) )
 697                 {
 698                     /* we have only a partial list of options, no device */
 699                     psz_parser = psz_raw;
 700                     psz_raw = NULL;
 701                     b_options = 1;
 702                     break;
 703                 }
 704                 psz_parser++;
 705             }
 706         }
 707     }
 708     else
 709     {
 710         /* found beginning of options ; no raw device specified */
 711         psz_raw = NULL;
 712         b_options = 1;
 713     }
 714
 715     if( b_options )
 716     {
 717         /* Found options */
 718         i_title = (int)strtol( psz_parser, &psz_next, 10 );
 719         if( *psz_next )
 720         {
 721             psz_parser = psz_next + 1;
 722             i_chapter = (int)strtol( psz_parser, &psz_next, 10 );
 723             if( *psz_next )
 724             {
 725                 i_angle = (int)strtol( psz_next + 1, NULL, 10 );
 726             }
 727         }
 728
 729         p_dvd->i_title = i_title ? i_title : 1;
 730         p_dvd->i_chapter = i_chapter ? i_chapter : 1;
 731         p_dvd->i_angle = i_angle ? i_angle : 1;
 732     }
 733
 734     if( psz_raw )
 735     {
 736         if( *psz_raw )
 737         {
 738             /* check the raw device */
 739             if( stat( psz_raw, &stat_info ) == -1 )
 740             {
 741                 intf_WarnMsg( 3, "dvd warning: cannot stat() raw"
 742                                 " device `%s' (%s)",
 743                              psz_raw, strerror(errno));
 744                 /* put back '@' */
 745                 *(psz_raw - 1) = '@';
 746                 psz_raw = NULL;
 747             }
 748             else
 749             {
 750                 char * psz_env;
 751
 752 #ifndef WIN32
 753                 if( !S_ISCHR(stat_info.st_mode) )
 754                 {
 755                     intf_WarnMsg( 3, "dvd warning: raw device %s is"
 756                                      " not a valid char device", psz_raw );
 757                     /* put back '@' */
 758                     *(psz_raw - 1) = '@';
 759                     psz_raw = NULL;
 760                 }
 761                 else
 762 #endif
 763                 {
 764                     psz_env = malloc( strlen("DVDCSS_RAW_DEVICE=")
 765                                     + strlen( psz_raw ) + 1 );
 766                     sprintf( psz_env, "DVDCSS_RAW_DEVICE=%s", psz_raw );
 767                     putenv( psz_env );
 768                 }
 769             }
 770         }
 771         else
 772         {
 773             psz_raw = NULL;
 774         }
 775     }
 776
 777     if( !*psz_device )
 778     {
 779         free( psz_device );
 780
 781         if( !p_input->psz_access )
 782         {
 783             /* no device and no access specified: we probably don't want DVD */
 784             return NULL;
 785         }
 786         psz_device = config_GetPszVariable( INPUT_DVD_DEVICE_VAR );
 787     }
 788
 789     /* check block device */
 790     if( stat( psz_device, &stat_info ) == -1 )
 791     {
 792         intf_ErrMsg( "input error: cannot stat() device `%s' (%s)",
 793                      psz_device, strerror(errno));
 794         return NULL;
 795     }
 796
 797 #ifndef WIN32
 798     if( !S_ISBLK(stat_info.st_mode) && !S_ISCHR(stat_info.st_mode) )
 799     {
 800         intf_WarnMsg( 3, "input: DVD plugin discarded"
 801                          " (not a valid block device)" );
 802         return NULL;
 803     }
 804 #endif
 805
 806     intf_WarnMsg( 2, "input: dvd=%s raw=%s title=%d chapter=%d angle=%d",
 807                   psz_device, psz_raw, p_dvd->i_title,
 808                   p_dvd->i_chapter, p_dvd->i_angle );
 809
 810     return psz_device;
 811 }