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

   1 /*****************************************************************************
   2  * input_dvd.c: DVD raw reading plugin.
   3  *****************************************************************************
   4  * This plugins should handle all the known specificities of the DVD format,
   5  * especially the 2048 bytes logical block size.
   6  * It depends on:
   7  *  -input_netlist used to read packets
   8  *  -dvd_ifo for ifo parsing and analyse
   9  *  -dvd_css for unscrambling
  10  *  -dvd_udf to find files
  11  *****************************************************************************
  12  * Copyright (C) 1998-2001 VideoLAN
  13  * $Id: input_dvd.c,v 1.66 2001/05/31 16:10:05 stef Exp $
  14  *
  15  * Author: Stéphane Borel <stef@via.ecp.fr>
  16  *
  17  * This program is free software; you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation; either version 2 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  30  *****************************************************************************/
  31
  32 /*****************************************************************************
  33  * Preamble
  34  *****************************************************************************/
  35 #include "defs.h"
  36
  37 #ifdef HAVE_CSS
  38 #   define MODULE_NAME dvd
  39 #else /* HAVE_CSS */
  40 #   define MODULE_NAME dvdnocss
  41 #endif /* HAVE_CSS */
  42
  43 #include "modules_inner.h"
  44
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47
  48 #ifdef HAVE_UNISTD_H
  49 #   include <unistd.h>
  50 #endif
  51
  52 #if !defined( WIN32 )
  53 #   include <netinet/in.h>
  54 #endif
  55
  56 #include <fcntl.h>
  57 #include <sys/types.h>
  58 #include <string.h>
  59 #include <errno.h>
  60
  61 #ifdef STRNCASECMP_IN_STRINGS_H
  62 #   include <strings.h>
  63 #endif
  64
  65 #if defined( WIN32 )
  66 #   include <io.h>
  67 #   include "input_iovec.h"
  68 #else
  69 #   include <sys/uio.h>                                      /* struct iovec */
  70 #endif
  71
  72 #include "config.h"
  73 #include "common.h"
  74 #include "threads.h"
  75 #include "mtime.h"
  76 #include "tests.h"
  77
  78 #include "intf_msg.h"
  79
  80 #include "main.h"
  81
  82 #include "stream_control.h"
  83 #include "input_ext-intf.h"
  84 #include "input_ext-dec.h"
  85
  86 #include "input.h"
  87
  88 #include "dvd_netlist.h"
  89 #include "dvd_ifo.h"
  90 #include "dvd_css.h"
  91 #include "dvd_summary.h"
  92 #include "input_dvd.h"
  93 #include "mpeg_system.h"
  94
  95 #include "debug.h"
  96
  97 #include "modules.h"
  98
  99 /* how many blocks DVDRead will read in each loop */
 100 #define DVD_BLOCK_READ_ONCE 32
 101 #define DVD_DATA_READ_ONCE  4*DVD_BLOCK_READ_ONCE
 102
 103 /* Size of netlist */
 104 #define DVD_NETLIST_SIZE    2048
 105
 106 /*****************************************************************************
 107  * Local prototypes
 108  *****************************************************************************/
 109 /* called from outside */
 110 static int  DVDProbe    ( probedata_t *p_data );
 111 static void DVDInit     ( struct input_thread_s * );
 112 static void DVDEnd      ( struct input_thread_s * );
 113 static int  DVDSetArea  ( struct input_thread_s *, struct input_area_s * );
 114 static int  DVDRead     ( struct input_thread_s *, data_packet_t ** );
 115 static void DVDSeek     ( struct input_thread_s *, off_t );
 116 static int  DVDRewind   ( struct input_thread_s * );
 117
 118 /* called only inside */
 119 static int  DVDChooseAngle( thread_dvd_data_t * );
 120 static int  DVDFindCell( thread_dvd_data_t * );
 121 static int  DVDFindSector( thread_dvd_data_t * );
 122 static int  DVDChapterSelect( thread_dvd_data_t *, int );
 123
 124 /*****************************************************************************
 125  * Functions exported as capabilities. They are declared as static so that
 126  * we don't pollute the namespace too much.
 127  *****************************************************************************/
 128 void _M( input_getfunctions )( function_list_t * p_function_list )
 129 {
 130 #define input p_function_list->functions.input
 131     p_function_list->pf_probe = DVDProbe;
 132     input.pf_init             = DVDInit;
 133     input.pf_open             = NULL; /* Set in DVDInit */
 134     input.pf_close            = NULL;
 135     input.pf_end              = DVDEnd;
 136     input.pf_read             = DVDRead;
 137     input.pf_set_area         = DVDSetArea;
 138     input.pf_demux            = input_DemuxPS;
 139     input.pf_new_packet       = DVDNewPacket;
 140     input.pf_new_pes          = DVDNewPES;
 141     input.pf_delete_packet    = DVDDeletePacket;
 142     input.pf_delete_pes       = DVDDeletePES;
 143     input.pf_rewind           = DVDRewind;
 144     input.pf_seek             = DVDSeek;
 145 #undef input
 146 }
 147
 148 /*
 149  * Data reading functions
 150  */
 151
 152 /*****************************************************************************
 153  * DVDProbe: verifies that the stream is a PS stream
 154  *****************************************************************************/
 155 static int DVDProbe( probedata_t *p_data )
 156 {
 157     input_thread_t * p_input = (input_thread_t *)p_data;
 158
 159     char * psz_name = p_input->p_source;
 160     int i_handle;
 161     int i_score = 5;
 162 #if defined( WIN32 )
 163     char buf[7];
 164 #endif
 165
 166     if( TestMethod( INPUT_METHOD_VAR, "dvd" ) )
 167     {
 168 #ifdef HAVE_CSS
 169         return( 999 );
 170 #else /* HAVE_CSS */
 171         return( 998 );
 172 #endif /* HAVE_CSS */
 173     }
 174
 175     if( ( strlen(psz_name) > 4 ) && !strncasecmp( psz_name, "dvd:", 4 ) )
 176     {
 177         /* If the user specified "dvd:" then it's probably a DVD */
 178 #ifdef HAVE_CSS
 179         i_score = 100;
 180 #else /* HAVE_CSS */
 181         i_score = 90;
 182 #endif /* HAVE_CSS */
 183         psz_name += 4;
 184     }
 185
 186 #if !defined( WIN32 )
 187     i_handle = open( psz_name, 0 );
 188     if( i_handle == -1 )
 189     {
 190         return( 0 );
 191     }
 192     close( i_handle );
 193 #else
 194     snprintf( buf, 7, "\\\\.\\%c:", psz_name[0] );
 195     (HANDLE) i_handle = CreateFile( i_score < 90 ? psz_name : buf,
 196                         GENERIC_READ | GENERIC_WRITE,
 197                         FILE_SHARE_READ | FILE_SHARE_WRITE,
 198                         NULL, OPEN_EXISTING, 0, NULL );
 199     if( (HANDLE) i_handle == INVALID_HANDLE_VALUE )
 200     {
 201         return( 0 );
 202     }
 203     CloseHandle( (HANDLE) i_handle );
 204 #endif
 205
 206     return( i_score );
 207 }
 208
 209 /*****************************************************************************
 210  * DVDInit: initializes DVD structures
 211  *****************************************************************************/
 212 static void DVDInit( input_thread_t * p_input )
 213 {
 214     thread_dvd_data_t *  p_dvd;
 215     input_area_t *       p_area;
 216     int                  i_title;
 217     int                  i_chapter;
 218     int                  i;
 219
 220     p_dvd = malloc( sizeof(thread_dvd_data_t) );
 221     if( p_dvd == NULL )
 222     {
 223         intf_ErrMsg( "dvd error: out of memory" );
 224         p_input->b_error = 1;
 225         return;
 226     }
 227
 228     p_input->p_plugin_data = (void *)p_dvd;
 229     p_input->p_method_data = NULL;
 230
 231     p_dvd->i_fd = p_input->i_handle;
 232
 233     /* We read DVD_BLOCK_READ_ONCE in each loop, so the input will receive
 234      * DVD_DATA_READ_ONCE at most */
 235     p_dvd->i_block_once = DVD_BLOCK_READ_ONCE;
 236     /* this value mustn't be modifed */
 237     p_input->i_read_once = DVD_DATA_READ_ONCE;
 238
 239     i = CSSTest( p_input->i_handle );
 240
 241     if( i < 0 )
 242     {
 243         intf_ErrMsg( "dvd error: error in css" );
 244         free( p_dvd );
 245         p_input->b_error = 1;
 246         return;
 247     }
 248
 249     p_dvd->b_encrypted = i;
 250
 251 #if !defined( WIN32 )
 252     lseek( p_input->i_handle, 0, SEEK_SET );
 253 #else
 254     SetFilePointer( (HANDLE) p_input->i_handle, 0, 0, FILE_BEGIN );
 255 #endif
 256
 257     /* Reading structures initialisation */
 258     p_input->p_method_data =
 259         DVDNetlistInit( DVD_NETLIST_SIZE, 2*DVD_NETLIST_SIZE,
 260                         DVD_NETLIST_SIZE, DVD_LB_SIZE, p_dvd->i_block_once );
 261     intf_WarnMsg( 2, "dvd info: netlist initialized" );
 262
 263     /* Ifo allocation & initialisation */
 264     if( IfoCreate( p_dvd ) < 0 )
 265     {
 266         intf_ErrMsg( "dvd error: allcation error in ifo" );
 267         p_input->b_error = 1;
 268         return;
 269     }
 270
 271     if( IfoInit( p_dvd->p_ifo ) < 0 )
 272     {
 273         intf_ErrMsg( "dvd error: fatal failure in ifo" );
 274         free( p_dvd );
 275         p_input->b_error = 1;
 276         return;
 277     }
 278
 279     /* CSS initialisation */
 280     if( p_dvd->b_encrypted )
 281     {
 282         p_dvd->p_css = malloc( sizeof(css_t) );
 283         if( p_dvd->p_css == NULL )
 284         {
 285             intf_ErrMsg( "dvd error: couldn't create css structure" );
 286             free( p_dvd );
 287             p_input->b_error = 1;
 288             return;
 289         }
 290
 291         p_dvd->p_css->i_agid = 0;
 292
 293         if( CSSInit( p_input->i_handle, p_dvd->p_css ) < 0 )
 294         {
 295             intf_ErrMsg( "dvd error: fatal failure in css" );
 296             free( p_dvd->p_css );
 297             free( p_dvd );
 298             p_input->b_error = 1;
 299             return;
 300         }
 301
 302         intf_WarnMsg( 2, "dvd info: css initialized" );
 303     }
 304
 305     /* Set stream and area data */
 306     vlc_mutex_lock( &p_input->stream.stream_lock );
 307
 308     /* Initialize ES structures */
 309     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 310
 311     /* disc input method */
 312     p_input->stream.i_method = INPUT_METHOD_DVD;
 313
 314 #define title_inf p_dvd->p_ifo->vmg.title_inf
 315     intf_WarnMsg( 2, "dvd info: number of titles: %d", title_inf.i_title_nb );
 316
 317 #define area p_input->stream.pp_areas
 318     /* We start from 1 here since the default area 0
 319      * is reserved for video_ts.vob */
 320     for( i = 1 ; i <= title_inf.i_title_nb ; i++ )
 321     {
 322         input_AddArea( p_input );
 323
 324         /* Titles are Program Chains */
 325         area[i]->i_id = i;
 326
 327         /* Absolute start offset and size
 328          * We can only set that with vts ifo, so we do it during the
 329          * first call to DVDSetArea */
 330         area[i]->i_start = 0;
 331         area[i]->i_size = 0;
 332
 333         /* Number of chapters */
 334         area[i]->i_part_nb = title_inf.p_attr[i-1].i_chapter_nb;
 335         area[i]->i_part = 1;
 336
 337         /* Number of angles */
 338         area[i]->i_angle_nb = 0;
 339         area[i]->i_angle = 1;
 340
 341         /* Offset to vts_i_0.ifo */
 342         area[i]->i_plugin_data = p_dvd->p_ifo->i_off +
 343                        ( title_inf.p_attr[i-1].i_start_sector * DVD_LB_SIZE );
 344     }
 345 #undef area
 346
 347     /* Get requested title - if none try the first title */
 348     i_title = main_GetIntVariable( INPUT_TITLE_VAR, 1 );
 349     if( i_title <= 0 || i_title > title_inf.i_title_nb )
 350     {
 351         i_title = 1;
 352     }
 353
 354 #undef title_inf
 355
 356     /* Get requested chapter - if none defaults to first one */
 357     i_chapter = main_GetIntVariable( INPUT_CHAPTER_VAR, 1 );
 358     if( i_chapter <= 0 )
 359     {
 360         i_chapter = 1;
 361     }
 362
 363     p_input->stream.pp_areas[i_title]->i_part = i_chapter;
 364
 365     p_area = p_input->stream.pp_areas[i_title];
 366
 367     /* set title, chapter, audio and subpic */
 368     DVDSetArea( p_input, p_area );
 369
 370     vlc_mutex_unlock( &p_input->stream.stream_lock );
 371
 372     return;
 373 }
 374
 375 /*****************************************************************************
 376  * DVDEnd: frees unused data
 377  *****************************************************************************/
 378 static void DVDEnd( input_thread_t * p_input )
 379 {
 380     thread_dvd_data_t *     p_dvd;
 381     dvd_netlist_t *         p_netlist;
 382
 383     p_dvd = (thread_dvd_data_t*)p_input->p_plugin_data;
 384     p_netlist = (dvd_netlist_t *)p_input->p_method_data;
 385
 386     if( p_dvd->b_encrypted )
 387     {
 388         free( p_dvd->p_css );
 389     }
 390
 391     IfoDestroy( p_dvd->p_ifo );
 392     free( p_dvd );
 393     DVDNetlistEnd( p_netlist );
 394 }
 395
 396 /*****************************************************************************
 397  * DVDSetArea: initialize input data for title x, chapter y.
 398  * It should be called for each user navigation request.
 399  *****************************************************************************
 400  * Take care that i_title starts from 0 (vmg) and i_chapter start from 1.
 401  * Note that you have to take the lock before entering here.
 402  *****************************************************************************/
 403 static int DVDSetArea( input_thread_t * p_input, input_area_t * p_area )
 404 {
 405     thread_dvd_data_t *  p_dvd;
 406     es_descriptor_t *    p_es;
 407     u16                  i_id;
 408     int                  i_vts_title;
 409     int                  i_audio;
 410     int                  i_spu;
 411     int                  i;
 412     int                  j;
 413
 414     p_dvd = (thread_dvd_data_t*)p_input->p_plugin_data;
 415
 416     /* we can't use the interface slider until initilization is complete */
 417     p_input->stream.b_seekable = 0;
 418
 419     if( p_area != p_input->stream.p_selected_area )
 420     {
 421
 422         /*
 423          *  We have to load all title information
 424          */
 425         /* Change the default area */
 426         p_input->stream.p_selected_area =
 427                     p_input->stream.pp_areas[p_area->i_id];
 428
 429         /* release the lock to to let the interface go */
 430 //        vlc_mutex_unlock( &p_input->stream.stream_lock );
 431
 432         /* title number: it is not vts nb!,
 433          * it is what appears in the interface list */
 434         p_dvd->i_title = p_area->i_id;
 435         p_dvd->p_ifo->i_title = p_dvd->i_title;
 436
 437         /* set number of chapters of current title */
 438         p_dvd->i_chapter_nb = p_area->i_part_nb;
 439
 440         /* ifo vts */
 441         if( IfoTitleSet( p_dvd->p_ifo ) < 0 )
 442         {
 443             intf_ErrMsg( "dvd error: fatal error in vts ifo" );
 444             free( p_dvd );
 445             p_input->b_error = 1;
 446             return -1;
 447         }
 448
 449 #define vmg p_dvd->p_ifo->vmg
 450 #define vts p_dvd->p_ifo->vts
 451         /* title position inside the selected vts */
 452         i_vts_title = vmg.title_inf.p_attr[p_dvd->i_title-1].i_title_num;
 453         p_dvd->i_title_id =
 454             vts.title_inf.p_title_start[i_vts_title-1].i_title_id;
 455
 456         intf_WarnMsg( 3, "dvd: title %d vts_title %d pgc %d",
 457                         p_dvd->i_title,
 458                         i_vts_title,
 459                         p_dvd->i_title_id );
 460
 461         /* css title key for current vts */
 462         if( p_dvd->b_encrypted )
 463         {
 464             /* this one is vts number */
 465             p_dvd->p_css->i_title =
 466                     vmg.title_inf.p_attr[p_dvd->i_title-1].i_title_set_num;
 467             p_dvd->p_css->i_title_pos =
 468                     vts.i_pos +
 469                     vts.manager_inf.i_title_vob_start_sector * DVD_LB_SIZE;
 470
 471             j = CSSGetKey( p_input->i_handle, p_dvd->p_css );
 472             if( j < 0 )
 473             {
 474                 intf_ErrMsg( "dvd error: fatal error in vts css key" );
 475                 free( p_dvd );
 476                 p_input->b_error = 1;
 477                 return -1;
 478             }
 479             else if( j > 0 )
 480             {
 481                 intf_ErrMsg( "dvd error: css decryption unavailable" );
 482                 free( p_dvd );
 483                 p_input->b_error = 1;
 484                 return -1;
 485             }
 486         }
 487
 488         /*
 489          * Angle management
 490          */
 491         p_dvd->i_angle_nb = vmg.title_inf.p_attr[p_dvd->i_title-1].i_angle_nb;
 492         p_dvd->i_angle = main_GetIntVariable( INPUT_ANGLE_VAR, 1 );
 493         if( ( p_dvd->i_angle <= 0 ) || p_dvd->i_angle > p_dvd->i_angle_nb )
 494         {
 495             p_dvd->i_angle = 1;
 496         }
 497
 498         /*
 499          * Set selected title start and size
 500          */
 501
 502         /* title set offset */
 503         p_dvd->i_title_start = vts.i_pos + DVD_LB_SIZE *
 504                       (off_t)( vts.manager_inf.i_title_vob_start_sector );
 505
 506         /* last video cell */
 507         p_dvd->i_cell = 0;
 508         p_dvd->i_prg_cell = -1 +
 509             vts.title_unit.p_title[p_dvd->i_title_id-1].title.i_cell_nb;
 510
 511         if( DVDFindCell( p_dvd ) < 0 )
 512         {
 513             intf_ErrMsg( "dvd error: can't find title end" );
 514             p_input->b_error = 1;
 515             return -1;
 516         }
 517
 518         /* temporary hack to fix size in some dvds */
 519         if( p_dvd->i_cell >= vts.cell_inf.i_cell_nb )
 520         {
 521             p_dvd->i_cell = vts.cell_inf.i_cell_nb - 1;
 522         }
 523
 524         p_dvd->i_sector = 0;
 525         p_dvd->i_size = DVD_LB_SIZE *
 526           (off_t)( vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector );
 527         intf_WarnMsg( 2, "dvd info: stream size 1: %lld @ %d", p_dvd->i_size,
 528                       vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector );
 529
 530         if( DVDChapterSelect( p_dvd, 1 ) < 0 )
 531         {
 532             intf_ErrMsg( "dvd error: can't find first chapter" );
 533             p_input->b_error = 1;
 534             return -1;
 535         }
 536
 537         p_dvd->i_size -= (off_t)( p_dvd->i_sector + 1 ) *DVD_LB_SIZE;
 538
 539         IfoPrintTitle( p_dvd );
 540
 541 //        vlc_mutex_lock( &p_input->stream.stream_lock );
 542
 543         /* Area definition */
 544         p_input->stream.p_selected_area->i_start = p_dvd->i_start;
 545         p_input->stream.p_selected_area->i_size = p_dvd->i_size;
 546         p_input->stream.p_selected_area->i_angle_nb = p_dvd->i_angle_nb;
 547         p_input->stream.p_selected_area->i_angle = p_dvd->i_angle;
 548
 549         /*
 550          * Destroy obsolete ES by reinitializing program 0
 551          * and find all ES in title with ifo data
 552          */
 553         if( p_input->stream.pp_programs != NULL )
 554         {
 555             /* We don't use input_EndStream here since
 556              * we keep area structures */
 557
 558             for( i = 0 ; i < p_input->stream.i_selected_es_number ; i++ )
 559             {
 560                 input_UnselectES( p_input, p_input->stream.pp_selected_es[i] );
 561             }
 562
 563             input_DelProgram( p_input, p_input->stream.pp_programs[0] );
 564
 565             p_input->stream.pp_selected_es = NULL;
 566             p_input->stream.i_selected_es_number = 0;
 567         }
 568
 569         input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
 570
 571         /* No PSM to read in DVD mode, we already have all information */
 572         p_input->stream.pp_programs[0]->b_is_ok = 1;
 573         p_input->stream.pp_programs[0]->i_synchro_state = SYNCHRO_START;
 574
 575         p_es = NULL;
 576
 577         /* ES 0 -> video MPEG2 */
 578         IfoPrintVideo( p_dvd );
 579
 580         p_es = input_AddES( p_input, p_input->stream.pp_programs[0], 0xe0, 0 );
 581         p_es->i_stream_id = 0xe0;
 582         p_es->i_type = MPEG2_VIDEO_ES;
 583         p_es->i_cat = VIDEO_ES;
 584         intf_WarnMsg( 1, "dvd info: video mpeg2 stream" );
 585         if( p_main->b_video )
 586         {
 587             input_SelectES( p_input, p_es );
 588         }
 589         intf_WarnMsg( 4, "dvd info: video selected" );
 590
 591 #define audio_status \
 592     vts.title_unit.p_title[p_dvd->i_title_id-1].title.pi_audio_status[i-1]
 593         /* Audio ES, in the order they appear in .ifo */
 594         for( i = 1 ; i <= vts.manager_inf.i_audio_nb ; i++ )
 595         {
 596             IfoPrintAudio( p_dvd, i );
 597
 598             /* audio channel is active if first byte is 0x80 */
 599             if( audio_status.i_available )
 600             {
 601                 switch( vts.manager_inf.p_audio_attr[i-1].i_coding_mode )
 602                 {
 603                 case 0x00:              /* AC3 */
 604                     i_id = ( ( 0x80 + audio_status.i_position ) << 8 ) | 0xbd;
 605                     p_es = input_AddES( p_input,
 606                                p_input->stream.pp_programs[0], i_id, 0 );
 607                     p_es->i_stream_id = 0xbd;
 608                     p_es->i_type = AC3_AUDIO_ES;
 609                     p_es->b_audio = 1;
 610                     p_es->i_cat = AUDIO_ES;
 611                     strcpy( p_es->psz_desc, IfoLanguage( hton16(
 612                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 613                     strcat( p_es->psz_desc, " (ac3)" );
 614
 615                     intf_WarnMsg( 3, "dvd info: audio stream %d %s\t(0x%x)",
 616                                   i, p_es->psz_desc, i_id );
 617
 618                     break;
 619                 case 0x02:
 620                 case 0x03:              /* MPEG audio */
 621                     i_id = 0xc0 + audio_status.i_position;
 622                     p_es = input_AddES( p_input,
 623                                     p_input->stream.pp_programs[0], i_id, 0 );
 624                     p_es->i_stream_id = i_id;
 625                     p_es->i_type = MPEG2_AUDIO_ES;
 626                     p_es->b_audio = 1;
 627                     p_es->i_cat = AUDIO_ES;
 628                     strcpy( p_es->psz_desc, IfoLanguage( hton16(
 629                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 630                     strcat( p_es->psz_desc, " (mpeg)" );
 631
 632                     intf_WarnMsg( 3, "dvd info: audio stream %d %s\t(0x%x)",
 633                                   i, p_es->psz_desc, i_id );
 634
 635                     break;
 636                 case 0x04:              /* LPCM */
 637
 638                     i_id = ( ( 0xa0 + audio_status.i_position ) << 8 ) | 0xbd;
 639                     p_es = input_AddES( p_input,
 640                                     p_input->stream.pp_programs[0], i_id, 0 );
 641                     p_es->i_stream_id = i_id;
 642                     p_es->i_type = LPCM_AUDIO_ES;
 643                     p_es->b_audio = 1;
 644                     p_es->i_cat = AUDIO_ES;
 645                     strcpy( p_es->psz_desc, IfoLanguage( hton16(
 646                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 647                     strcat( p_es->psz_desc, " (lpcm)" );
 648
 649                     intf_WarnMsg( 3, "dvd info: audio stream %d %s\t(0x%x)",
 650                                   i, p_es->psz_desc, i_id );
 651                     break;
 652                 case 0x06:              /* DTS */
 653                     i_id = ( ( 0x88 + audio_status.i_position ) << 8 ) | 0xbd;
 654                     intf_ErrMsg( "dvd warning: DTS audio not handled yet"
 655                                  "(0x%x)", i_id );
 656                     break;
 657                 default:
 658                     i_id = 0;
 659                     intf_ErrMsg( "dvd warning: unknown audio type %.2x",
 660                              vts.manager_inf.p_audio_attr[i-1].i_coding_mode );
 661                 }
 662             }
 663         }
 664 #undef audio_status
 665 #define spu_status \
 666     vts.title_unit.p_title[p_dvd->i_title_id-1].title.pi_spu_status[i-1]
 667
 668         /* Sub Picture ES */
 669
 670         for( i = 1 ; i <= vts.manager_inf.i_spu_nb; i++ )
 671         {
 672             IfoPrintSpu( p_dvd, i );
 673
 674             if( spu_status.i_available )
 675             {
 676                 /*  there are several streams for one spu */
 677                 if(  vts.manager_inf.video_attr.i_ratio )
 678                 {
 679                     /* 16:9 */
 680                     switch( vts.manager_inf.video_attr.i_perm_displ )
 681                     {
 682                     case 1:
 683                         i_id = ( ( 0x20 + spu_status.i_position_pan ) << 8 )
 684                                | 0xbd;
 685                         break;
 686                     case 2:
 687                         i_id = ( ( 0x20 + spu_status.i_position_letter ) << 8 )
 688                                | 0xbd;
 689                         break;
 690                     default:
 691                         i_id = ( ( 0x20 + spu_status.i_position_wide ) << 8 )
 692                                | 0xbd;
 693                         break;
 694                     }
 695                 }
 696                 else
 697                 {
 698                     /* 4:3 */
 699                     i_id = ( ( 0x20 + spu_status.i_position_43 ) << 8 )
 700                            | 0xbd;
 701                 }
 702                 p_es = input_AddES( p_input,
 703                                     p_input->stream.pp_programs[0], i_id, 0 );
 704                 p_es->i_stream_id = 0xbd;
 705                 p_es->i_type = DVD_SPU_ES;
 706                 p_es->i_cat = SPU_ES;
 707                 strcpy( p_es->psz_desc, IfoLanguage( hton16(
 708                     vts.manager_inf.p_spu_attr[i-1].i_lang_code ) ) );
 709                 intf_WarnMsg( 3, "dvd info: spu stream %d %s\t(0x%x)",
 710                               i, p_es->psz_desc, i_id );
 711             }
 712         }
 713 #undef spu_status
 714         if( p_main->b_audio )
 715         {
 716             /* For audio: first one if none or a not existing one specified */
 717             i_audio = main_GetIntVariable( INPUT_CHANNEL_VAR, 1 );
 718             if( i_audio < 0 || i_audio > vts.manager_inf.i_audio_nb )
 719             {
 720                 main_PutIntVariable( INPUT_CHANNEL_VAR, 1 );
 721                 i_audio = 1;
 722             }
 723             if( i_audio > 0 && vts.manager_inf.i_audio_nb > 0 )
 724             {
 725                 input_SelectES( p_input, p_input->stream.pp_es[i_audio] );
 726             }
 727         }
 728
 729         if( p_main->b_video )
 730         {
 731             /* for spu, default is none */
 732             i_spu = main_GetIntVariable( INPUT_SUBTITLE_VAR, 0 );
 733             if( i_spu < 0 || i_spu > vts.manager_inf.i_spu_nb )
 734             {
 735                 main_PutIntVariable( INPUT_SUBTITLE_VAR, 0 );
 736                 i_spu = 0;
 737             }
 738             if( i_spu > 0 && vts.manager_inf.i_spu_nb > 0 )
 739             {
 740                 i_spu += vts.manager_inf.i_audio_nb;
 741                 input_SelectES( p_input, p_input->stream.pp_es[i_spu] );
 742             }
 743         }
 744     } /* i_title >= 0 */
 745     else
 746     {
 747         p_area = p_input->stream.p_selected_area;
 748     }
 749 #undef vts
 750 #undef vmg
 751
 752     /*
 753      * Chapter selection
 754      */
 755
 756
 757     if( p_area->i_part != p_dvd->i_chapter )
 758     {
 759         if( ( p_area->i_part > 0 ) &&
 760             ( p_area->i_part <= p_area->i_part_nb ))
 761         {
 762             if( DVDChapterSelect( p_dvd, p_area->i_part ) < 0 )
 763             {
 764                 intf_ErrMsg( "dvd error: can't set chapter in area" );
 765                 p_input->b_error = 1;
 766                 return -1;
 767             }
 768
 769             p_input->stream.p_selected_area->i_tell = p_dvd->i_start -
 770                                                       p_area->i_start;
 771             p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 772
 773             intf_WarnMsg( 2, "dvd info: chapter %d start at: %lld",
 774                                         p_area->i_part, p_area->i_tell );
 775         }
 776         else
 777         {
 778             p_area->i_part = 1;
 779             p_dvd->i_chapter = 1;
 780         }
 781     }
 782
 783 #define title \
 784     p_dvd->p_ifo->vts.title_unit.p_title[p_dvd->i_title_id-1].title
 785     if( p_area->i_angle != p_dvd->i_angle )
 786     {
 787         if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
 788         {
 789             if( ( p_area->i_angle - p_dvd->i_angle ) < 0 )
 790             {
 791                 p_dvd->i_cell = 0;
 792             }
 793             p_dvd->i_prg_cell += ( p_area->i_angle - p_dvd->i_angle );
 794             p_dvd->i_angle = p_area->i_angle;
 795
 796             DVDFindSector( p_dvd );
 797             p_dvd->i_cell += p_dvd->i_angle_cell;
 798         }
 799         else
 800         {
 801             p_dvd->i_angle = p_area->i_angle;
 802         }
 803
 804         intf_WarnMsg( 2, "dvd info: angle %d selected", p_area->i_angle );
 805     }
 806
 807     /* warn interface that something has changed */
 808     p_input->stream.b_seekable = 1;
 809     p_input->stream.b_changed = 1;
 810
 811     p_input->stream.pp_programs[0]->i_synchro_state = SYNCHRO_REINIT;
 812
 813     return 0;
 814 }
 815
 816
 817 /*****************************************************************************
 818  * DVDRead: reads data packets into the netlist.
 819  *****************************************************************************
 820  * Returns -1 in case of error, 0 if everything went well, and 1 in case of
 821  * EOF.
 822  *****************************************************************************/
 823 static int DVDRead( input_thread_t * p_input,
 824                     data_packet_t ** pp_packets )
 825 {
 826     thread_dvd_data_t *     p_dvd;
 827     dvd_netlist_t *         p_netlist;
 828     struct iovec *          p_vec;
 829     struct data_packet_s *  pp_data[DVD_DATA_READ_ONCE];
 830     u8 *                    pi_cur;
 831     int                     i_block_once;
 832     int                     i_packet_size;
 833     int                     i_iovec;
 834     int                     i_packet;
 835     int                     i_pos;
 836     int                     i_read_bytes;
 837     int                     i_read_blocks;
 838     off_t                   i_off;
 839     boolean_t               b_eof;
 840     boolean_t               b_eot;
 841
 842     p_dvd = (thread_dvd_data_t *)p_input->p_plugin_data;
 843     p_netlist = (dvd_netlist_t *)p_input->p_method_data;
 844
 845     /* Get an iovec pointer */
 846     if( ( p_vec = DVDGetiovec( p_netlist ) ) == NULL )
 847     {
 848         intf_ErrMsg( "dvd error: can't get iovec" );
 849         return -1;
 850     }
 851
 852     i_block_once = p_dvd->i_end_sector - p_dvd->i_sector + 1;
 853
 854     /* Get the position of the next cell if we're at cell end */
 855     if( i_block_once <= 0 )
 856     {
 857         int     i_angle;
 858
 859         p_dvd->i_cell++;
 860         p_dvd->i_angle_cell++;
 861
 862         /* Find cell index in adress map */
 863         if( DVDFindSector( p_dvd ) < 0 )
 864         {
 865             pp_packets[0] = NULL;
 866             intf_ErrMsg( "dvd error: can't find next cell" );
 867             return 1;
 868         }
 869
 870         /* Position the fd pointer on the right address */
 871         i_off = lseek( p_dvd->i_fd,
 872                        p_dvd->i_title_start +
 873                        (off_t)( p_dvd->i_sector ) *DVD_LB_SIZE, SEEK_SET );
 874
 875         /* update chapter : it will be easier when we have navigation
 876          * ES support */
 877         if( p_dvd->i_chapter < ( p_dvd->i_chapter_nb - 1 ) )
 878         {
 879             if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
 880             {
 881                 i_angle = p_dvd->i_angle - 1;
 882             }
 883             else
 884             {
 885                 i_angle = 0;
 886             }
 887             if( title.chapter_map.pi_start_cell[p_dvd->i_chapter] <=
 888                 ( p_dvd->i_prg_cell - i_angle + 1 ) )
 889             {
 890                 p_dvd->i_chapter++;
 891             }
 892         }
 893
 894         vlc_mutex_lock( &p_input->stream.stream_lock );
 895
 896         p_input->stream.p_selected_area->i_tell = i_off -
 897                                     p_input->stream.p_selected_area->i_start;
 898         p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 899
 900         /* the synchro has to be reinitialized when we change cell */
 901         p_input->stream.pp_programs[0]->i_synchro_state = SYNCHRO_REINIT;
 902
 903         vlc_mutex_unlock( &p_input->stream.stream_lock );
 904
 905         i_block_once = p_dvd->i_end_sector - p_dvd->i_sector + 1;
 906     }
 907
 908     /* the number of blocks read is the maw between the requested
 909      * value and the leaving block in the cell */
 910     if( i_block_once > p_dvd->i_block_once )
 911     {
 912         i_block_once = p_dvd->i_block_once;
 913     }
 914 //intf_WarnMsg( 2, "Sector: 0x%x Read: %d Chapter: %d", p_dvd->i_sector, i_block_once, p_dvd->i_chapter );
 915
 916     p_netlist->i_read_once = i_block_once;
 917
 918     /* Reads from DVD */
 919 #if !defined( WIN32 )
 920     i_read_bytes = readv( p_dvd->i_fd, p_vec, i_block_once );
 921 #else
 922     i_read_bytes = ReadFileV( p_dvd->i_fd, p_vec, i_block_once );
 923 #endif
 924     i_read_blocks = ( i_read_bytes + 0x7ff ) >> 11;
 925
 926     /* Update netlist indexes */
 927     DVDMviovec( p_netlist, i_read_blocks, pp_data );
 928
 929     /* Update global position */
 930     p_dvd->i_sector += i_read_blocks;
 931
 932     i_packet = 0;
 933
 934     /* Read headers to compute payload length */
 935     for( i_iovec = 0 ; i_iovec < i_read_blocks ; i_iovec++ )
 936     {
 937         if( p_dvd->b_encrypted )
 938         {
 939             CSSDescrambleSector( p_dvd->p_css->pi_title_key,
 940                                  p_vec[i_iovec].iov_base );
 941             ((u8*)(p_vec[i_iovec].iov_base))[0x14] &= 0x8F;
 942         }
 943
 944         i_pos = 0;
 945
 946         while( i_pos < p_netlist->i_buffer_size )
 947         {
 948             pi_cur = (u8*)p_vec[i_iovec].iov_base + i_pos;
 949
 950             /*default header */
 951             if( U32_AT( pi_cur ) != 0x1BA )
 952             {
 953                 /* That's the case for all packets, except pack header. */
 954                 i_packet_size = U16_AT( pi_cur + 4 );
 955                 pp_packets[i_packet] = DVDNewPtr( p_netlist );
 956             }
 957             else
 958             {
 959                 /* Pack header. */
 960                 if( ( pi_cur[4] & 0xC0 ) == 0x40 )
 961                 {
 962                     /* MPEG-2 */
 963                     i_packet_size = 8;
 964                 }
 965                 else if( ( pi_cur[4] & 0xF0 ) == 0x20 )
 966                 {
 967                     /* MPEG-1 */
 968                     i_packet_size = 6;
 969                 }
 970                 else
 971                 {
 972                     intf_ErrMsg( "Unable to determine stream type" );
 973                     return( -1 );
 974                 }
 975
 976                 pp_packets[i_packet] = pp_data[i_iovec];
 977
 978             }
 979
 980             (*pp_data[i_iovec]->pi_refcount)++;
 981
 982             pp_packets[i_packet]->pi_refcount = pp_data[i_iovec]->pi_refcount;
 983
 984             pp_packets[i_packet]->p_buffer = pp_data[i_iovec]->p_buffer;
 985
 986             pp_packets[i_packet]->p_payload_start =
 987                     pp_packets[i_packet]->p_buffer + i_pos;
 988
 989             pp_packets[i_packet]->p_payload_end =
 990                     pp_packets[i_packet]->p_payload_start + i_packet_size + 6;
 991
 992             pp_packets[i_packet]->p_next = NULL;
 993             pp_packets[i_packet]->b_discard_payload = 0;
 994
 995             i_packet++;
 996             i_pos += i_packet_size + 6;
 997         }
 998     }
 999
1000     pp_packets[i_packet] = NULL;
1001
1002     vlc_mutex_lock( &p_input->stream.stream_lock );
1003
1004     p_input->stream.p_selected_area->i_tell += i_read_bytes;
1005     b_eot = !( p_input->stream.p_selected_area->i_tell < p_dvd->i_size );
1006     b_eof = b_eot && ( ( p_dvd->i_title + 1 ) >= p_input->stream.i_area_nb );
1007
1008     vlc_mutex_unlock( &p_input->stream.stream_lock );
1009
1010     if( b_eof )
1011     {
1012         return 1;
1013     }
1014
1015     if( b_eot )
1016     {
1017         intf_WarnMsg( 4, "dvd info: new title" );
1018         p_dvd->i_title++;
1019         vlc_mutex_lock( &p_input->stream.stream_lock );
1020         DVDSetArea( p_input, p_input->stream.pp_areas[p_dvd->i_title] );
1021         vlc_mutex_unlock( &p_input->stream.stream_lock );
1022         return 0;
1023     }
1024
1025     if( i_read_blocks == i_block_once )
1026     {
1027         return 0;
1028     }
1029
1030     return -1;
1031 }
1032
1033 /*****************************************************************************
1034  * DVDRewind : reads a stream backward
1035  *****************************************************************************/
1036 static int DVDRewind( input_thread_t * p_input )
1037 {
1038     return( -1 );
1039 }
1040
1041 /*****************************************************************************
1042  * DVDSeek : Goes to a given position on the stream.
1043  *****************************************************************************
1044  * This one is used by the input and translate chronological position from
1045  * input to logical position on the device.
1046  * The lock should be taken before calling this function.
1047  *****************************************************************************/
1048 static void DVDSeek( input_thread_t * p_input, off_t i_off )
1049 {
1050     thread_dvd_data_t *     p_dvd;
1051     off_t                   i_pos;
1052     int                     i_prg_cell;
1053     int                     i_cell;
1054     int                     i_chapter;
1055     int                     i_angle;
1056
1057     p_dvd = ( thread_dvd_data_t * )p_input->p_plugin_data;
1058
1059     /* we have to take care of offset of beginning of title */
1060     i_pos = i_off + p_input->stream.p_selected_area->i_start
1061                   - p_dvd->i_title_start;
1062
1063     /* update navigation data */
1064     p_dvd->i_sector = i_pos >> 11;
1065
1066     i_prg_cell = 0;
1067     i_chapter = 0;
1068
1069     /* parse vobu address map to find program cell */
1070     while( title.p_cell_play[i_prg_cell].i_end_sector < p_dvd->i_sector  )
1071     {
1072         i_prg_cell++;
1073     }
1074
1075     p_dvd->i_prg_cell = i_prg_cell;
1076
1077     if( DVDChooseAngle( p_dvd ) < 0 )
1078     {
1079         p_input->b_error = 1;
1080         return;
1081     }
1082
1083     p_dvd->i_cell = 0;
1084
1085     /* Find first title cell which is inside program cell */
1086     if( DVDFindCell( p_dvd ) < 0 )
1087     {
1088         /* no following cell : we're at eof */
1089         intf_ErrMsg( "dvd error: cell seeking failed" );
1090         p_input->b_error = 1;
1091         return;
1092     }
1093
1094     i_cell = p_dvd->i_cell;
1095
1096 #define cell p_dvd->p_ifo->vts.cell_inf.p_cell_map[i_cell]
1097     /* parse cell address map to find title cell containing sector */
1098     while( cell.i_end_sector < p_dvd->i_sector )
1099     {
1100         i_cell++;
1101     }
1102
1103     p_dvd->i_cell = i_cell;
1104
1105     /* if we're inside a multi-angle zone, we have to choose i_sector
1106      * in the current angle ; we can't do it all the time since cells
1107      * can be very wide out of such zones */
1108     if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1109     {
1110         p_dvd->i_sector = MAX(
1111                 cell.i_start_sector,
1112                 title.p_cell_play[p_dvd->i_prg_cell].i_start_sector );
1113     }
1114
1115     p_dvd->i_end_sector = MIN(
1116             cell.i_end_sector,
1117             title.p_cell_play[p_dvd->i_prg_cell].i_end_sector );
1118 #undef cell
1119     /* update chapter */
1120     if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1121     {
1122         i_angle = p_dvd->i_angle - 1;
1123     }
1124     else
1125     {
1126         i_angle = 0;
1127     }
1128     while( ( title.chapter_map.pi_start_cell[i_chapter] <=
1129                 ( p_dvd->i_prg_cell - i_angle + 1 ) ) &&
1130            ( i_chapter < ( p_dvd->i_chapter_nb - 1 ) ) )
1131     {
1132         i_chapter++;
1133     }
1134
1135     p_dvd->i_chapter = i_chapter;
1136     p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
1137
1138 #if !defined( WIN32 )
1139     p_input->stream.p_selected_area->i_tell =
1140                 lseek( p_dvd->i_fd, p_dvd->i_title_start +
1141                        (off_t)( p_dvd->i_sector ) *DVD_LB_SIZE, SEEK_SET ) -
1142                 p_input->stream.p_selected_area->i_start;
1143 #else
1144     p_input->stream.p_selected_area->i_tell =
1145                 SetFilePointer( (HANDLE) p_dvd->i_fd, p_dvd->i_title_start +
1146                         (off_t)( p_dvd->i_sector ) *DVD_LB_SIZE, NULL, FILE_BEGIN) -
1147                          p_input->stream.p_selected_area->i_start;
1148
1149 #endif
1150 /*
1151     intf_WarnMsg( 3, "Program Cell: %d Cell: %d Chapter: %d",
1152                      p_dvd->i_prg_cell, p_dvd->i_cell, p_dvd->i_chapter );
1153 */
1154
1155     return;
1156 }
1157
1158 #define cell  p_dvd->p_ifo->vts.cell_inf
1159
1160 /*****************************************************************************
1161  * DVDFindCell: adjust the title cell index with the program cell
1162  *****************************************************************************/
1163 static int DVDFindCell( thread_dvd_data_t * p_dvd )
1164 {
1165     int                 i_cell;
1166     int                 i_index;
1167
1168     i_cell = p_dvd->i_cell;
1169     i_index = p_dvd->i_prg_cell;
1170
1171     if( i_cell >= cell.i_cell_nb )
1172     {
1173         return -1;
1174     }
1175
1176     while( ( ( title.p_cell_pos[i_index].i_vob_id !=
1177                    cell.p_cell_map[i_cell].i_vob_id ) ||
1178       ( title.p_cell_pos[i_index].i_cell_id !=
1179                    cell.p_cell_map[i_cell].i_cell_id ) ) &&
1180            ( i_cell < cell.i_cell_nb - 1 ) )
1181     {
1182         i_cell++;
1183     }
1184
1185 /*
1186 intf_WarnMsg( 3, "FindCell: i_cell %d i_index %d found %d nb %d",
1187                     p_dvd->i_cell,
1188                     p_dvd->i_prg_cell,
1189                     i_cell,
1190                     cell.i_cell_nb );
1191 */
1192
1193     p_dvd->i_cell = i_cell;
1194
1195     return 0;
1196 }
1197
1198 #undef cell
1199
1200 /*****************************************************************************
1201  * DVDFindSector: find cell index in adress map from index in
1202  * information table program map and give corresponding sectors.
1203  *****************************************************************************/
1204 static int DVDFindSector( thread_dvd_data_t * p_dvd )
1205 {
1206
1207     if( p_dvd->i_sector > title.p_cell_play[p_dvd->i_prg_cell].i_end_sector )
1208     {
1209         p_dvd->i_prg_cell++;
1210
1211         if( DVDChooseAngle( p_dvd ) < 0 )
1212         {
1213             return -1;
1214         }
1215     }
1216
1217     if( DVDFindCell( p_dvd ) < 0 )
1218     {
1219         intf_ErrMsg( "dvd error: can't find sector" );
1220         return -1;
1221     }
1222
1223     /* Find start and end sectors of new cell */
1224 #if 1
1225     p_dvd->i_sector = MAX(
1226          p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_start_sector,
1227          title.p_cell_play[p_dvd->i_prg_cell].i_start_sector );
1228     p_dvd->i_end_sector = MIN(
1229          p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector,
1230          title.p_cell_play[p_dvd->i_prg_cell].i_end_sector );
1231 #else
1232     p_dvd->i_sector = title.p_cell_play[p_dvd->i_prg_cell].i_start_sector;
1233     p_dvd->i_end_sector = title.p_cell_play[p_dvd->i_prg_cell].i_end_sector;
1234 #endif
1235
1236 /*
1237     intf_WarnMsg( 3, "cell: %d sector1: 0x%x end1: 0x%x\n"
1238                    "index: %d sector2: 0x%x end2: 0x%x\n"
1239                    "category: 0x%x ilvu end: 0x%x vobu start 0x%x",
1240         p_dvd->i_cell,
1241         p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_start_sector,
1242         p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector,
1243         p_dvd->i_prg_cell,
1244         title.p_cell_play[p_dvd->i_prg_cell].i_start_sector,
1245         title.p_cell_play[p_dvd->i_prg_cell].i_end_sector,
1246         title.p_cell_play[p_dvd->i_prg_cell].i_category,
1247         title.p_cell_play[p_dvd->i_prg_cell].i_first_ilvu_vobu_esector,
1248         title.p_cell_play[p_dvd->i_prg_cell].i_last_vobu_start_sector );
1249 */
1250
1251     return 0;
1252 }
1253
1254 /*****************************************************************************
1255  * DVDChapterSelect: find the cell corresponding to requested chapter
1256  *****************************************************************************/
1257 static int DVDChapterSelect( thread_dvd_data_t * p_dvd, int i_chapter )
1258 {
1259
1260     /* Find cell index in Program chain for current chapter */
1261     p_dvd->i_prg_cell = title.chapter_map.pi_start_cell[i_chapter-1] - 1;
1262     p_dvd->i_cell = 0;
1263     p_dvd->i_sector = 0;
1264
1265     DVDChooseAngle( p_dvd );
1266
1267     /* Search for cell_index in cell adress_table and initialize
1268      * start sector */
1269     if( DVDFindSector( p_dvd ) < 0 )
1270     {
1271         intf_ErrMsg( "dvd error: can't select chapter" );
1272         return -1;
1273     }
1274
1275     /* start is : beginning of vts vobs + offset to vob x */
1276     p_dvd->i_start = p_dvd->i_title_start +
1277                          DVD_LB_SIZE * (off_t)( p_dvd->i_sector );
1278
1279     /* Position the fd pointer on the right address */
1280 #if !defined( WIN32 )
1281     p_dvd->i_start = lseek( p_dvd->i_fd, p_dvd->i_start, SEEK_SET );
1282 #else
1283     p_dvd->i_start = SetFilePointer( (HANDLE) p_dvd->i_fd,
1284                         p_dvd->i_start, NULL, FILE_BEGIN );
1285 #endif
1286
1287     p_dvd->i_chapter = i_chapter;
1288     return 0;
1289 }
1290
1291 /*****************************************************************************
1292  * DVDChooseAngle: select the cell corresponding to the selected angle
1293  *****************************************************************************/
1294 static int DVDChooseAngle( thread_dvd_data_t * p_dvd )
1295 {
1296     /* basic handling of angles */
1297     switch( ( ( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1298                     >> 12 ) )
1299     {
1300         /* we enter a muli-angle section */
1301         case 0x5:
1302             p_dvd->i_prg_cell += p_dvd->i_angle - 1;
1303             p_dvd->i_angle_cell = 0;
1304             break;
1305         /* we exit a multi-angle section */
1306         case 0x9:
1307         case 0xd:
1308             p_dvd->i_prg_cell += p_dvd->i_angle_nb - p_dvd->i_angle;
1309             break;
1310     }
1311
1312     return 0;
1313 }
1314
1315 #undef title