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  *  -libdvdcss for access and unscrambling
   9  *  -dvd_ifo for ifo parsing and analyse
  10  *  -dvd_udf to find files
  11  *****************************************************************************
  12  * Copyright (C) 1998-2001 VideoLAN
  13  * $Id: input_dvd.c,v 1.83 2001/07/30 18:56:35 gbazin 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 #define MODULE_NAME dvd
  33 #include "modules_inner.h"
  34
  35 /*****************************************************************************
  36  * Preamble
  37  *****************************************************************************/
  38 #include "defs.h"
  39
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42
  43 #ifdef HAVE_UNISTD_H
  44 #   include <unistd.h>
  45 #endif
  46
  47 #include <fcntl.h>
  48 #include <sys/types.h>
  49 #include <string.h>
  50 #include <errno.h>
  51
  52 #ifdef STRNCASECMP_IN_STRINGS_H
  53 #   include <strings.h>
  54 #endif
  55
  56 #if defined( WIN32 )
  57 #   include <io.h>                                                 /* read() */
  58 #else
  59 #   include <sys/uio.h>                                      /* struct iovec */
  60 #endif
  61
  62 #include <videolan/dvdcss.h>
  63
  64 #include "config.h"
  65 #include "common.h"
  66 #include "threads.h"
  67 #include "mtime.h"
  68 #include "tests.h"
  69
  70 #if defined( WIN32 )
  71 #   include "input_iovec.h"
  72 #endif
  73
  74 #include "intf_msg.h"
  75
  76 #include "main.h"
  77
  78 #include "stream_control.h"
  79 #include "input_ext-intf.h"
  80 #include "input_ext-dec.h"
  81 #include "input_ext-plugins.h"
  82
  83 #include "input_dvd.h"
  84 #include "dvd_netlist.h"
  85 #include "dvd_ifo.h"
  86 #include "dvd_summary.h"
  87
  88 #include "debug.h"
  89
  90 #include "modules.h"
  91 #include "modules_export.h"
  92
  93 /* how many blocks DVDRead will read in each loop */
  94 #define DVD_BLOCK_READ_ONCE 64
  95 #define DVD_DATA_READ_ONCE  (4 * DVD_BLOCK_READ_ONCE)
  96
  97 /* Size of netlist */
  98 #define DVD_NETLIST_SIZE    256
  99
 100 /*****************************************************************************
 101  * Local prototypes
 102  *****************************************************************************/
 103 /* called from outside */
 104 static int  DVDProbe    ( probedata_t *p_data );
 105 static void DVDInit     ( struct input_thread_s * );
 106 static void DVDEnd      ( struct input_thread_s * );
 107 static void DVDOpen     ( struct input_thread_s * );
 108 static void DVDClose    ( struct input_thread_s * );
 109 static int  DVDSetArea  ( struct input_thread_s *, struct input_area_s * );
 110 static int  DVDRead     ( struct input_thread_s *, data_packet_t ** );
 111 static void DVDSeek     ( struct input_thread_s *, off_t );
 112 static int  DVDRewind   ( struct input_thread_s * );
 113
 114 /* called only inside */
 115 static int  DVDChooseAngle( thread_dvd_data_t * );
 116 static int  DVDFindCell( thread_dvd_data_t * );
 117 static int  DVDFindSector( thread_dvd_data_t * );
 118 static int  DVDChapterSelect( thread_dvd_data_t *, int );
 119
 120 /*****************************************************************************
 121  * Functions exported as capabilities. They are declared as static so that
 122  * we don't pollute the namespace too much.
 123  *****************************************************************************/
 124 void _M( input_getfunctions )( function_list_t * p_function_list )
 125 {
 126 #define input p_function_list->functions.input
 127     p_function_list->pf_probe = DVDProbe;
 128     input.pf_init             = DVDInit;
 129     input.pf_open             = DVDOpen;
 130     input.pf_close            = DVDClose;
 131     input.pf_end              = DVDEnd;
 132     input.pf_init_bit_stream  = InitBitstream;
 133     input.pf_read             = DVDRead;
 134     input.pf_set_area         = DVDSetArea;
 135     input.pf_demux            = input_DemuxPS;
 136     input.pf_new_packet       = DVDNewPacket;
 137     input.pf_new_pes          = DVDNewPES;
 138     input.pf_delete_packet    = DVDDeletePacket;
 139     input.pf_delete_pes       = DVDDeletePES;
 140     input.pf_rewind           = DVDRewind;
 141     input.pf_seek             = DVDSeek;
 142 #undef input
 143 }
 144
 145 /*
 146  * Data reading functions
 147  */
 148
 149 /*****************************************************************************
 150  * DVDProbe: verifies that the stream is a PS stream
 151  *****************************************************************************/
 152 static int DVDProbe( probedata_t *p_data )
 153 {
 154     input_thread_t * p_input = (input_thread_t *)p_data;
 155
 156     char * psz_name = p_input->p_source;
 157     int i_score = 5;
 158
 159     if( TestMethod( INPUT_METHOD_VAR, "dvd" ) )
 160     {
 161         return( 999 );
 162     }
 163
 164     if( ( strlen(psz_name) > 4 ) && !strncasecmp( psz_name, "dvd:", 4 ) )
 165     {
 166         /* If the user specified "dvd:" then it's probably a DVD */
 167         i_score = 100;
 168         psz_name += 4;
 169     }
 170
 171     return( i_score );
 172 }
 173
 174 /*****************************************************************************
 175  * DVDInit: initializes DVD structures
 176  *****************************************************************************/
 177 static void DVDInit( input_thread_t * p_input )
 178 {
 179     thread_dvd_data_t *  p_dvd;
 180     input_area_t *       p_area;
 181     int                  i_title;
 182     int                  i_chapter;
 183     int                  i;
 184
 185     p_dvd = malloc( sizeof(thread_dvd_data_t) );
 186     if( p_dvd == NULL )
 187     {
 188         intf_ErrMsg( "dvd error: out of memory" );
 189         p_input->b_error = 1;
 190         return;
 191     }
 192
 193     p_input->p_plugin_data = (void *)p_dvd;
 194     p_input->p_method_data = NULL;
 195
 196     p_dvd->dvdhandle = (dvdcss_handle) p_input->i_handle;
 197
 198     dvdcss_seek( p_dvd->dvdhandle, 0 );
 199
 200     /* We read DVD_BLOCK_READ_ONCE in each loop, so the input will receive
 201      * DVD_DATA_READ_ONCE at most */
 202     p_dvd->i_block_once = DVD_BLOCK_READ_ONCE;
 203     /* this value mustn't be modifed */
 204     p_input->i_read_once = DVD_DATA_READ_ONCE;
 205
 206     /* Reading structures initialisation */
 207     p_input->p_method_data =
 208         DVDNetlistInit( DVD_NETLIST_SIZE, 2 * DVD_NETLIST_SIZE,
 209                         DVD_NETLIST_SIZE, DVD_LB_SIZE, p_dvd->i_block_once );
 210     intf_WarnMsg( 2, "dvd info: netlist initialized" );
 211
 212     /* Ifo allocation & initialisation */
 213     if( IfoCreate( p_dvd ) < 0 )
 214     {
 215         intf_ErrMsg( "dvd error: allcation error in ifo" );
 216         dvdcss_close( p_dvd->dvdhandle );
 217         free( p_dvd );
 218         p_input->b_error = 1;
 219         return;
 220     }
 221
 222     if( IfoInit( p_dvd->p_ifo ) < 0 )
 223     {
 224         intf_ErrMsg( "dvd error: fatal failure in ifo" );
 225         IfoDestroy( p_dvd->p_ifo );
 226         dvdcss_close( p_dvd->dvdhandle );
 227         free( p_dvd );
 228         p_input->b_error = 1;
 229         return;
 230     }
 231
 232     /* Set stream and area data */
 233     vlc_mutex_lock( &p_input->stream.stream_lock );
 234
 235     /* Initialize ES structures */
 236     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 237
 238     /* disc input method */
 239     p_input->stream.i_method = INPUT_METHOD_DVD;
 240
 241 #define title_inf p_dvd->p_ifo->vmg.title_inf
 242     intf_WarnMsg( 2, "dvd info: number of titles: %d", title_inf.i_title_nb );
 243
 244 #define area p_input->stream.pp_areas
 245     /* We start from 1 here since the default area 0
 246      * is reserved for video_ts.vob */
 247     for( i = 1 ; i <= title_inf.i_title_nb ; i++ )
 248     {
 249         input_AddArea( p_input );
 250
 251         /* Titles are Program Chains */
 252         area[i]->i_id = i;
 253
 254         /* Absolute start offset and size
 255          * We can only set that with vts ifo, so we do it during the
 256          * first call to DVDSetArea */
 257         area[i]->i_start = 0;
 258         area[i]->i_size = 0;
 259
 260         /* Number of chapters */
 261         area[i]->i_part_nb = title_inf.p_attr[i-1].i_chapter_nb;
 262         area[i]->i_part = 1;
 263
 264         /* Number of angles */
 265         area[i]->i_angle_nb = 0;
 266         area[i]->i_angle = 1;
 267
 268         /* Offset to vts_i_0.ifo */
 269         area[i]->i_plugin_data = p_dvd->p_ifo->i_start +
 270                        title_inf.p_attr[i-1].i_start_sector;
 271     }
 272 #undef area
 273
 274     /* Get requested title - if none try the first title */
 275     i_title = main_GetIntVariable( INPUT_TITLE_VAR, 1 );
 276     if( i_title <= 0 || i_title > title_inf.i_title_nb )
 277     {
 278         i_title = 1;
 279     }
 280
 281 #undef title_inf
 282
 283     /* Get requested chapter - if none defaults to first one */
 284     i_chapter = main_GetIntVariable( INPUT_CHAPTER_VAR, 1 );
 285     if( i_chapter <= 0 )
 286     {
 287         i_chapter = 1;
 288     }
 289
 290     p_input->stream.pp_areas[i_title]->i_part = i_chapter;
 291
 292     p_area = p_input->stream.pp_areas[i_title];
 293
 294     /* set title, chapter, audio and subpic */
 295     DVDSetArea( p_input, p_area );
 296
 297     vlc_mutex_unlock( &p_input->stream.stream_lock );
 298
 299     return;
 300 }
 301
 302 /*****************************************************************************
 303  * DVDOpen: open dvd
 304  *****************************************************************************/
 305 static void DVDOpen( struct input_thread_s *p_input )
 306 {
 307     dvdcss_handle dvdhandle;
 308
 309     vlc_mutex_lock( &p_input->stream.stream_lock );
 310
 311     /* If we are here we can control the pace... */
 312     p_input->stream.b_pace_control = 1;
 313
 314     p_input->stream.b_seekable = 1;
 315     p_input->stream.p_selected_area->i_size = 0;
 316
 317     p_input->stream.p_selected_area->i_tell = 0;
 318
 319     vlc_mutex_unlock( &p_input->stream.stream_lock );
 320
 321     /* XXX: put this shit in an access plugin */
 322     if( strlen( p_input->p_source ) > 4
 323          && !strncasecmp( p_input->p_source, "dvd:", 4 ) )
 324     {
 325         dvdhandle = dvdcss_open( p_input->p_source + 4, DVDCSS_INIT_QUIET );
 326     }
 327     else
 328     {
 329         dvdhandle = dvdcss_open( p_input->p_source, DVDCSS_INIT_QUIET );
 330     }
 331
 332     if( dvdhandle == NULL )
 333     {
 334         p_input->b_error = 1;
 335         return;
 336     }
 337
 338     p_input->i_handle = (int) dvdhandle;
 339 }
 340
 341 /*****************************************************************************
 342  * DVDClose: close dvd
 343  *****************************************************************************/
 344 static void DVDClose( struct input_thread_s *p_input )
 345 {
 346     /* Clean up libdvdcss */
 347     dvdcss_close( (dvdcss_handle) p_input->i_handle );
 348 }
 349
 350 /*****************************************************************************
 351  * DVDEnd: frees unused data
 352  *****************************************************************************/
 353 static void DVDEnd( input_thread_t * p_input )
 354 {
 355     thread_dvd_data_t *     p_dvd;
 356     dvd_netlist_t *         p_netlist;
 357
 358     p_dvd = (thread_dvd_data_t*)p_input->p_plugin_data;
 359     p_netlist = (dvd_netlist_t *)p_input->p_method_data;
 360
 361     IfoDestroy( p_dvd->p_ifo );
 362
 363     free( p_dvd );
 364
 365     DVDNetlistEnd( p_netlist );
 366 }
 367
 368 /*****************************************************************************
 369  * DVDSetArea: initialize input data for title x, chapter y.
 370  * It should be called for each user navigation request.
 371  *****************************************************************************
 372  * Take care that i_title starts from 0 (vmg) and i_chapter start from 1.
 373  * Note that you have to take the lock before entering here.
 374  *****************************************************************************/
 375 static int DVDSetArea( input_thread_t * p_input, input_area_t * p_area )
 376 {
 377     thread_dvd_data_t *  p_dvd;
 378     es_descriptor_t *    p_es;
 379     u16                  i_id;
 380     int                  i_vts_title;
 381     int                  i_audio;
 382     int                  i_spu;
 383     int                  i;
 384
 385     p_dvd = (thread_dvd_data_t*)p_input->p_plugin_data;
 386
 387     /* we can't use the interface slider until initilization is complete */
 388     p_input->stream.b_seekable = 0;
 389
 390     if( p_area != p_input->stream.p_selected_area )
 391     {
 392         /* Reset the Chapter position of the old title */
 393         p_input->stream.p_selected_area->i_part = 0;
 394
 395         /*
 396          *  We have to load all title information
 397          */
 398         /* Change the default area */
 399         p_input->stream.p_selected_area =
 400                     p_input->stream.pp_areas[p_area->i_id];
 401
 402         /* title number: it is not vts nb!,
 403          * it is what appears in the interface list */
 404         p_dvd->i_title = p_area->i_id;
 405         p_dvd->p_ifo->i_title = p_dvd->i_title;
 406
 407         /* set number of chapters of current title */
 408         p_dvd->i_chapter_nb = p_area->i_part_nb;
 409
 410         /* ifo vts */
 411         if( IfoTitleSet( p_dvd->p_ifo ) < 0 )
 412         {
 413             intf_ErrMsg( "dvd error: fatal error in vts ifo" );
 414             free( p_dvd );
 415             p_input->b_error = 1;
 416             return -1;
 417         }
 418
 419 #define vmg p_dvd->p_ifo->vmg
 420 #define vts p_dvd->p_ifo->vts
 421         /* title position inside the selected vts */
 422         i_vts_title = vmg.title_inf.p_attr[p_dvd->i_title-1].i_title_num;
 423         p_dvd->i_title_id =
 424             vts.title_inf.p_title_start[i_vts_title-1].i_title_id;
 425
 426         intf_WarnMsgImm( 3, "dvd: title %d vts_title %d pgc %d",
 427                          p_dvd->i_title, i_vts_title, p_dvd->i_title_id );
 428
 429         /*
 430          * Tell libdvdcss we changed title
 431          */
 432         dvdcss_title( p_dvd->dvdhandle,
 433                       vts.i_pos + vts.manager_inf.i_title_vob_start_sector );
 434
 435         /*
 436          * Angle management
 437          */
 438         p_dvd->i_angle_nb = vmg.title_inf.p_attr[p_dvd->i_title-1].i_angle_nb;
 439         p_dvd->i_angle = main_GetIntVariable( INPUT_ANGLE_VAR, 1 );
 440         if( ( p_dvd->i_angle <= 0 ) || p_dvd->i_angle > p_dvd->i_angle_nb )
 441         {
 442             p_dvd->i_angle = 1;
 443         }
 444
 445         /*
 446          * Set selected title start and size
 447          */
 448
 449         /* title set offset XXX: convert to block values */
 450         p_dvd->i_title_start =
 451             vts.i_pos + vts.manager_inf.i_title_vob_start_sector;
 452
 453         /* last video cell */
 454         p_dvd->i_cell = 0;
 455         p_dvd->i_prg_cell = -1 +
 456             vts.title_unit.p_title[p_dvd->i_title_id-1].title.i_cell_nb;
 457
 458         if( DVDFindCell( p_dvd ) < 0 )
 459         {
 460             intf_ErrMsg( "dvd error: can't find title end" );
 461             p_input->b_error = 1;
 462             return -1;
 463         }
 464
 465         /* temporary hack to fix size in some dvds */
 466         if( p_dvd->i_cell >= vts.cell_inf.i_cell_nb )
 467         {
 468             p_dvd->i_cell = vts.cell_inf.i_cell_nb - 1;
 469         }
 470
 471         p_dvd->i_sector = 0;
 472         p_dvd->i_size = vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector;
 473
 474         if( DVDChapterSelect( p_dvd, 1 ) < 0 )
 475         {
 476             intf_ErrMsg( "dvd error: can't find first chapter" );
 477             p_input->b_error = 1;
 478             return -1;
 479         }
 480
 481         p_dvd->i_size -= p_dvd->i_sector + 1;
 482
 483         IfoPrintTitle( p_dvd );
 484
 485         /* Area definition */
 486         p_input->stream.p_selected_area->i_start = LB2OFF( p_dvd->i_start );
 487         p_input->stream.p_selected_area->i_size = LB2OFF( p_dvd->i_size );
 488         p_input->stream.p_selected_area->i_angle_nb = p_dvd->i_angle_nb;
 489         p_input->stream.p_selected_area->i_angle = p_dvd->i_angle;
 490
 491 #if 0
 492         /* start at the beginning of the title */
 493         /* FIXME: create a conf option to select whether to restart
 494          * title or not */
 495         p_input->stream.p_selected_area->i_tell = 0;
 496         p_input->stream.p_selected_area->i_part = 1;
 497 #endif
 498
 499         /*
 500          * Destroy obsolete ES by reinitializing program 0
 501          * and find all ES in title with ifo data
 502          */
 503         if( p_input->stream.pp_programs != NULL )
 504         {
 505             /* We don't use input_EndStream here since
 506              * we keep area structures */
 507
 508             for( i = 0 ; i < p_input->stream.i_selected_es_number ; i++ )
 509             {
 510                 input_UnselectES( p_input, p_input->stream.pp_selected_es[i] );
 511             }
 512
 513             input_DelProgram( p_input, p_input->stream.pp_programs[0] );
 514
 515             p_input->stream.pp_selected_es = NULL;
 516             p_input->stream.i_selected_es_number = 0;
 517         }
 518
 519         input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
 520
 521         /* No PSM to read in DVD mode, we already have all information */
 522         p_input->stream.pp_programs[0]->b_is_ok = 1;
 523
 524         p_es = NULL;
 525
 526         /* ES 0 -> video MPEG2 */
 527         IfoPrintVideo( p_dvd );
 528
 529         p_es = input_AddES( p_input, p_input->stream.pp_programs[0], 0xe0, 0 );
 530         p_es->i_stream_id = 0xe0;
 531         p_es->i_type = MPEG2_VIDEO_ES;
 532         p_es->i_cat = VIDEO_ES;
 533         if( p_main->b_video )
 534         {
 535             input_SelectES( p_input, p_es );
 536         }
 537
 538 #define audio_status \
 539     vts.title_unit.p_title[p_dvd->i_title_id-1].title.pi_audio_status[i-1]
 540         /* Audio ES, in the order they appear in .ifo */
 541         for( i = 1 ; i <= vts.manager_inf.i_audio_nb ; i++ )
 542         {
 543             IfoPrintAudio( p_dvd, i );
 544
 545             /* audio channel is active if first byte is 0x80 */
 546             if( audio_status.i_available )
 547             {
 548                 switch( vts.manager_inf.p_audio_attr[i-1].i_coding_mode )
 549                 {
 550                 case 0x00:              /* AC3 */
 551                     i_id = ( ( 0x80 + audio_status.i_position ) << 8 ) | 0xbd;
 552                     p_es = input_AddES( p_input,
 553                                p_input->stream.pp_programs[0], i_id, 0 );
 554                     p_es->i_stream_id = 0xbd;
 555                     p_es->i_type = AC3_AUDIO_ES;
 556                     p_es->b_audio = 1;
 557                     p_es->i_cat = AUDIO_ES;
 558                     strcpy( p_es->psz_desc, IfoLanguage( hton16(
 559                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 560                     strcat( p_es->psz_desc, " (ac3)" );
 561
 562                     break;
 563                 case 0x02:
 564                 case 0x03:              /* MPEG audio */
 565                     i_id = 0xc0 + audio_status.i_position;
 566                     p_es = input_AddES( p_input,
 567                                     p_input->stream.pp_programs[0], i_id, 0 );
 568                     p_es->i_stream_id = i_id;
 569                     p_es->i_type = MPEG2_AUDIO_ES;
 570                     p_es->b_audio = 1;
 571                     p_es->i_cat = AUDIO_ES;
 572                     strcpy( p_es->psz_desc, IfoLanguage( hton16(
 573                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 574                     strcat( p_es->psz_desc, " (mpeg)" );
 575
 576                     break;
 577                 case 0x04:              /* LPCM */
 578
 579                     i_id = ( ( 0xa0 + audio_status.i_position ) << 8 ) | 0xbd;
 580                     p_es = input_AddES( p_input,
 581                                     p_input->stream.pp_programs[0], i_id, 0 );
 582                     p_es->i_stream_id = i_id;
 583                     p_es->i_type = LPCM_AUDIO_ES;
 584                     p_es->b_audio = 1;
 585                     p_es->i_cat = AUDIO_ES;
 586                     strcpy( p_es->psz_desc, IfoLanguage( hton16(
 587                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 588                     strcat( p_es->psz_desc, " (lpcm)" );
 589
 590                     break;
 591                 case 0x06:              /* DTS */
 592                     i_id = ( ( 0x88 + audio_status.i_position ) << 8 ) | 0xbd;
 593                     intf_ErrMsg( "dvd warning: DTS audio not handled yet"
 594                                  "(0x%x)", i_id );
 595                     break;
 596                 default:
 597                     i_id = 0;
 598                     intf_ErrMsg( "dvd warning: unknown audio type %.2x",
 599                              vts.manager_inf.p_audio_attr[i-1].i_coding_mode );
 600                 }
 601             }
 602         }
 603 #undef audio_status
 604 #define spu_status \
 605     vts.title_unit.p_title[p_dvd->i_title_id-1].title.pi_spu_status[i-1]
 606
 607         /* Sub Picture ES */
 608
 609         for( i = 1 ; i <= vts.manager_inf.i_spu_nb; i++ )
 610         {
 611             IfoPrintSpu( p_dvd, i );
 612
 613             if( spu_status.i_available )
 614             {
 615                 /*  there are several streams for one spu */
 616                 if(  vts.manager_inf.video_attr.i_ratio )
 617                 {
 618                     /* 16:9 */
 619                     switch( vts.manager_inf.video_attr.i_perm_displ )
 620                     {
 621                     case 1:
 622                         i_id = ( ( 0x20 + spu_status.i_position_pan ) << 8 )
 623                                | 0xbd;
 624                         break;
 625                     case 2:
 626                         i_id = ( ( 0x20 + spu_status.i_position_letter ) << 8 )
 627                                | 0xbd;
 628                         break;
 629                     default:
 630                         i_id = ( ( 0x20 + spu_status.i_position_wide ) << 8 )
 631                                | 0xbd;
 632                         break;
 633                     }
 634                 }
 635                 else
 636                 {
 637                     /* 4:3 */
 638                     i_id = ( ( 0x20 + spu_status.i_position_43 ) << 8 )
 639                            | 0xbd;
 640                 }
 641                 p_es = input_AddES( p_input,
 642                                     p_input->stream.pp_programs[0], i_id, 0 );
 643                 p_es->i_stream_id = 0xbd;
 644                 p_es->i_type = DVD_SPU_ES;
 645                 p_es->i_cat = SPU_ES;
 646                 strcpy( p_es->psz_desc, IfoLanguage( hton16(
 647                     vts.manager_inf.p_spu_attr[i-1].i_lang_code ) ) );
 648             }
 649         }
 650 #undef spu_status
 651         if( p_main->b_audio )
 652         {
 653             /* For audio: first one if none or a not existing one specified */
 654             i_audio = main_GetIntVariable( INPUT_CHANNEL_VAR, 1 );
 655             if( i_audio < 0 || i_audio > vts.manager_inf.i_audio_nb )
 656             {
 657                 main_PutIntVariable( INPUT_CHANNEL_VAR, 1 );
 658                 i_audio = 1;
 659             }
 660             if( i_audio > 0 && vts.manager_inf.i_audio_nb > 0 )
 661             {
 662                 input_SelectES( p_input, p_input->stream.pp_es[i_audio] );
 663             }
 664         }
 665
 666         if( p_main->b_video )
 667         {
 668             /* for spu, default is none */
 669             i_spu = main_GetIntVariable( INPUT_SUBTITLE_VAR, 0 );
 670             if( i_spu < 0 || i_spu > vts.manager_inf.i_spu_nb )
 671             {
 672                 main_PutIntVariable( INPUT_SUBTITLE_VAR, 0 );
 673                 i_spu = 0;
 674             }
 675             if( i_spu > 0 && vts.manager_inf.i_spu_nb > 0 )
 676             {
 677                 i_spu += vts.manager_inf.i_audio_nb;
 678                 input_SelectES( p_input, p_input->stream.pp_es[i_spu] );
 679             }
 680         }
 681     } /* i_title >= 0 */
 682     else
 683     {
 684         p_area = p_input->stream.p_selected_area;
 685     }
 686 #undef vts
 687 #undef vmg
 688
 689     /*
 690      * Chapter selection
 691      */
 692
 693     if( p_area->i_part != p_dvd->i_chapter )
 694     {
 695         if( ( p_area->i_part > 0 ) &&
 696             ( p_area->i_part <= p_area->i_part_nb ))
 697         {
 698             if( DVDChapterSelect( p_dvd, p_area->i_part ) < 0 )
 699             {
 700                 intf_ErrMsg( "dvd error: can't set chapter in area" );
 701                 p_input->b_error = 1;
 702                 return -1;
 703             }
 704
 705             p_input->stream.p_selected_area->i_tell =
 706                                    LB2OFF( p_dvd->i_start ) - p_area->i_start;
 707             p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 708
 709             intf_WarnMsg( 4, "dvd info: chapter %d start at: %lld",
 710                                         p_area->i_part, p_area->i_tell );
 711         }
 712         else
 713         {
 714             p_area->i_part = 1;
 715             p_dvd->i_chapter = 1;
 716         }
 717     }
 718
 719 #define title \
 720     p_dvd->p_ifo->vts.title_unit.p_title[p_dvd->i_title_id-1].title
 721     if( p_area->i_angle != p_dvd->i_angle )
 722     {
 723         if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
 724         {
 725             if( ( p_area->i_angle - p_dvd->i_angle ) < 0 )
 726             {
 727                 p_dvd->i_cell = 0;
 728             }
 729             p_dvd->i_prg_cell += ( p_area->i_angle - p_dvd->i_angle );
 730             p_dvd->i_angle = p_area->i_angle;
 731
 732             DVDFindSector( p_dvd );
 733             p_dvd->i_cell += p_dvd->i_angle_cell;
 734         }
 735         else
 736         {
 737             p_dvd->i_angle = p_area->i_angle;
 738         }
 739
 740         intf_WarnMsg( 3, "dvd info: angle %d selected", p_area->i_angle );
 741     }
 742
 743     /* warn interface that something has changed */
 744     p_input->stream.b_seekable = 1;
 745     p_input->stream.b_changed = 1;
 746
 747     return 0;
 748 }
 749
 750
 751 /*****************************************************************************
 752  * DVDRead: reads data packets into the netlist.
 753  *****************************************************************************
 754  * Returns -1 in case of error, 0 if everything went well, and 1 in case of
 755  * EOF.
 756  *****************************************************************************/
 757 static int DVDRead( input_thread_t * p_input,
 758                     data_packet_t ** pp_packets )
 759 {
 760     thread_dvd_data_t *     p_dvd;
 761     dvd_netlist_t *         p_netlist;
 762     struct iovec *          p_vec;
 763     struct data_packet_s *  pp_data[DVD_DATA_READ_ONCE];
 764     u8 *                    pi_cur;
 765     int                     i_block_once;
 766     int                     i_packet_size;
 767     int                     i_iovec;
 768     int                     i_packet;
 769     int                     i_pos;
 770     int                     i_read_blocks;
 771     int                     i_sector;
 772     boolean_t               b_eof;
 773     boolean_t               b_eot;
 774     boolean_t               b_eoc;
 775
 776     p_dvd = (thread_dvd_data_t *)p_input->p_plugin_data;
 777     p_netlist = (dvd_netlist_t *)p_input->p_method_data;
 778
 779     b_eoc = 0;
 780     i_sector = p_dvd->i_title_start + p_dvd->i_sector;
 781     i_block_once = p_dvd->i_end_sector - p_dvd->i_sector + 1;
 782
 783     /* Get the position of the next cell if we're at cell end */
 784     if( i_block_once <= 0 )
 785     {
 786         int     i_angle;
 787
 788         p_dvd->i_cell++;
 789         p_dvd->i_angle_cell++;
 790
 791         /* Find cell index in adress map */
 792         if( DVDFindSector( p_dvd ) < 0 )
 793         {
 794             pp_packets[0] = NULL;
 795             intf_ErrMsg( "dvd error: can't find next cell" );
 796             return 1;
 797         }
 798
 799         /* Position the fd pointer on the right address */
 800         i_sector = dvdcss_seek( p_dvd->dvdhandle,
 801                                 p_dvd->i_title_start + p_dvd->i_sector );
 802
 803         /* update chapter : it will be easier when we have navigation
 804          * ES support */
 805         if( p_dvd->i_chapter < ( p_dvd->i_chapter_nb - 1 ) )
 806         {
 807             if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
 808             {
 809                 i_angle = p_dvd->i_angle - 1;
 810             }
 811             else
 812             {
 813                 i_angle = 0;
 814             }
 815             if( title.chapter_map.pi_start_cell[p_dvd->i_chapter] <=
 816                 ( p_dvd->i_prg_cell - i_angle + 1 ) )
 817             {
 818                 p_dvd->i_chapter++;
 819                 b_eoc = 1;
 820             }
 821         }
 822
 823         i_block_once = p_dvd->i_end_sector - p_dvd->i_sector + 1;
 824     }
 825
 826     /* The number of blocks read is the max between the requested
 827      * value and the leaving block in the cell */
 828     if( i_block_once > p_dvd->i_block_once )
 829     {
 830         i_block_once = p_dvd->i_block_once;
 831     }
 832 /*
 833 intf_WarnMsg( 2, "Sector: 0x%x Read: %d Chapter: %d", p_dvd->i_sector, i_block_once, p_dvd->i_chapter );
 834 */
 835     p_netlist->i_read_once = i_block_once;
 836
 837     /* Get an iovec pointer */
 838     if( ( p_vec = DVDGetiovec( p_netlist ) ) == NULL )
 839     {
 840         intf_ErrMsg( "dvd error: can't get iovec" );
 841         return -1;
 842     }
 843
 844     /* Reads from DVD */
 845     i_read_blocks = dvdcss_readv( p_dvd->dvdhandle, p_vec,
 846                                   i_block_once, DVDCSS_READ_DECRYPT );
 847
 848     /* Update netlist indexes: we don't do it in DVDGetiovec since we
 849      * need know the real number of blocks read */
 850     DVDMviovec( p_netlist, i_read_blocks, pp_data );
 851
 852     /* Update global position */
 853     p_dvd->i_sector += i_read_blocks;
 854
 855     i_packet = 0;
 856
 857     /* Read headers to compute payload length */
 858     for( i_iovec = 0 ; i_iovec < i_read_blocks ; i_iovec++ )
 859     {
 860         i_pos = 0;
 861
 862         while( i_pos < p_netlist->i_buffer_size )
 863         {
 864             pi_cur = (u8*)p_vec[i_iovec].iov_base + i_pos;
 865
 866             /*default header */
 867             if( U32_AT( pi_cur ) != 0x1BA )
 868             {
 869                 /* That's the case for all packets, except pack header. */
 870                 i_packet_size = U16_AT( pi_cur + 4 );
 871                 pp_packets[i_packet] = DVDNewPtr( p_netlist );
 872             }
 873             else
 874             {
 875                 /* MPEG-2 Pack header. */
 876                 i_packet_size = 8;
 877                 pp_packets[i_packet] = pp_data[i_iovec];
 878
 879             }
 880
 881             (*pp_data[i_iovec]->pi_refcount)++;
 882
 883             pp_packets[i_packet]->pi_refcount = pp_data[i_iovec]->pi_refcount;
 884
 885             pp_packets[i_packet]->p_buffer = pp_data[i_iovec]->p_buffer;
 886
 887             pp_packets[i_packet]->p_payload_start =
 888                     pp_packets[i_packet]->p_buffer + i_pos;
 889
 890             pp_packets[i_packet]->p_payload_end =
 891                     pp_packets[i_packet]->p_payload_start + i_packet_size + 6;
 892
 893             pp_packets[i_packet]->p_next = NULL;
 894             pp_packets[i_packet]->b_discard_payload = 0;
 895
 896             i_packet++;
 897             i_pos += i_packet_size + 6;
 898         }
 899     }
 900
 901     pp_packets[i_packet] = NULL;
 902
 903     vlc_mutex_lock( &p_input->stream.stream_lock );
 904
 905     p_input->stream.p_selected_area->i_tell =
 906         LB2OFF( i_sector + i_read_blocks ) -
 907         p_input->stream.p_selected_area->i_start;
 908     if( b_eoc )
 909     {
 910         /* We modify i_part only at end of chapter not to erase
 911          * some modification from the interface */
 912         p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 913     }
 914
 915     b_eot = !( p_input->stream.p_selected_area->i_tell
 916                   < p_input->stream.p_selected_area->i_size );
 917     b_eof = b_eot && ( ( p_dvd->i_title + 1 ) >= p_input->stream.i_area_nb );
 918
 919     if( b_eof )
 920     {
 921         vlc_mutex_unlock( &p_input->stream.stream_lock );
 922         return 1;
 923     }
 924
 925     if( b_eot )
 926     {
 927         intf_WarnMsg( 4, "dvd info: new title" );
 928         p_dvd->i_title++;
 929         DVDSetArea( p_input, p_input->stream.pp_areas[p_dvd->i_title] );
 930         vlc_mutex_unlock( &p_input->stream.stream_lock );
 931         return 0;
 932     }
 933
 934     vlc_mutex_unlock( &p_input->stream.stream_lock );
 935
 936     if( i_read_blocks == i_block_once )
 937     {
 938         return 0;
 939     }
 940
 941     return -1;
 942 }
 943
 944 /*****************************************************************************
 945  * DVDRewind : reads a stream backward
 946  *****************************************************************************/
 947 static int DVDRewind( input_thread_t * p_input )
 948 {
 949     return( -1 );
 950 }
 951
 952 /*****************************************************************************
 953  * DVDSeek : Goes to a given position on the stream.
 954  *****************************************************************************
 955  * This one is used by the input and translate chronological position from
 956  * input to logical position on the device.
 957  * The lock should be taken before calling this function.
 958  *****************************************************************************/
 959 static void DVDSeek( input_thread_t * p_input, off_t i_off )
 960 {
 961     thread_dvd_data_t *     p_dvd;
 962     int                     i_prg_cell;
 963     int                     i_cell;
 964     int                     i_chapter;
 965     int                     i_angle;
 966
 967     p_dvd = ( thread_dvd_data_t * )p_input->p_plugin_data;
 968
 969     /* we have to take care of offset of beginning of title */
 970     p_dvd->i_sector = OFF2LB(i_off + p_input->stream.p_selected_area->i_start)
 971                        - p_dvd->i_title_start;
 972
 973     i_prg_cell = 0;
 974     i_chapter = 0;
 975
 976     /* parse vobu address map to find program cell */
 977     while( title.p_cell_play[i_prg_cell].i_end_sector < p_dvd->i_sector  )
 978     {
 979         i_prg_cell++;
 980     }
 981
 982     p_dvd->i_prg_cell = i_prg_cell;
 983
 984     if( DVDChooseAngle( p_dvd ) < 0 )
 985     {
 986         p_input->b_error = 1;
 987         return;
 988     }
 989
 990     p_dvd->i_cell = 0;
 991
 992     /* Find first title cell which is inside program cell */
 993     if( DVDFindCell( p_dvd ) < 0 )
 994     {
 995         /* no following cell : we're at eof */
 996         intf_ErrMsg( "dvd error: cell seeking failed" );
 997         p_input->b_error = 1;
 998         return;
 999     }
1000
1001     i_cell = p_dvd->i_cell;
1002
1003 #define cell p_dvd->p_ifo->vts.cell_inf.p_cell_map[i_cell]
1004     /* parse cell address map to find title cell containing sector */
1005     while( cell.i_end_sector < p_dvd->i_sector )
1006     {
1007         i_cell++;
1008     }
1009
1010     p_dvd->i_cell = i_cell;
1011
1012     /* if we're inside a multi-angle zone, we have to choose i_sector
1013      * in the current angle ; we can't do it all the time since cells
1014      * can be very wide out of such zones */
1015     if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1016     {
1017         p_dvd->i_sector = MAX(
1018                 cell.i_start_sector,
1019                 title.p_cell_play[p_dvd->i_prg_cell].i_start_sector );
1020     }
1021
1022     p_dvd->i_end_sector = MIN(
1023             cell.i_end_sector,
1024             title.p_cell_play[p_dvd->i_prg_cell].i_end_sector );
1025 #undef cell
1026     /* update chapter */
1027     if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1028     {
1029         i_angle = p_dvd->i_angle - 1;
1030     }
1031     else
1032     {
1033         i_angle = 0;
1034     }
1035     if( p_dvd->i_chapter_nb > 1 )
1036     {
1037         while( ( title.chapter_map.pi_start_cell[i_chapter] <=
1038                     ( p_dvd->i_prg_cell - i_angle + 1 ) ) &&
1039                ( i_chapter < ( p_dvd->i_chapter_nb - 1 ) ) )
1040         {
1041             i_chapter++;
1042         }
1043     }
1044     else
1045     {
1046         i_chapter = 1;
1047     }
1048
1049     p_dvd->i_chapter = i_chapter;
1050     p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
1051
1052     p_input->stream.p_selected_area->i_tell =
1053         LB2OFF ( dvdcss_seek( p_dvd->dvdhandle, p_dvd->i_title_start
1054                                                  + p_dvd->i_sector ) )
1055          - p_input->stream.p_selected_area->i_start;
1056
1057     intf_WarnMsg( 7, "Program Cell: %d Cell: %d Chapter: %d",
1058                      p_dvd->i_prg_cell, p_dvd->i_cell, p_dvd->i_chapter );
1059
1060
1061     return;
1062 }
1063
1064 #define cell  p_dvd->p_ifo->vts.cell_inf
1065
1066 /*****************************************************************************
1067  * DVDFindCell: adjust the title cell index with the program cell
1068  *****************************************************************************/
1069 static int DVDFindCell( thread_dvd_data_t * p_dvd )
1070 {
1071     int                 i_cell;
1072     int                 i_index;
1073
1074     i_cell = p_dvd->i_cell;
1075     i_index = p_dvd->i_prg_cell;
1076
1077     if( i_cell >= cell.i_cell_nb )
1078     {
1079         return -1;
1080     }
1081
1082     while( ( ( title.p_cell_pos[i_index].i_vob_id !=
1083                    cell.p_cell_map[i_cell].i_vob_id ) ||
1084       ( title.p_cell_pos[i_index].i_cell_id !=
1085                    cell.p_cell_map[i_cell].i_cell_id ) ) &&
1086            ( i_cell < cell.i_cell_nb - 1 ) )
1087     {
1088         i_cell++;
1089     }
1090
1091 /*
1092 intf_WarnMsg( 7, "FindCell: i_cell %d i_index %d found %d nb %d",
1093                     p_dvd->i_cell,
1094                     p_dvd->i_prg_cell,
1095                     i_cell,
1096                     cell.i_cell_nb );
1097 */
1098
1099     p_dvd->i_cell = i_cell;
1100
1101     return 0;
1102 }
1103
1104 #undef cell
1105
1106 /*****************************************************************************
1107  * DVDFindSector: find cell index in adress map from index in
1108  * information table program map and give corresponding sectors.
1109  *****************************************************************************/
1110 static int DVDFindSector( thread_dvd_data_t * p_dvd )
1111 {
1112
1113     if( p_dvd->i_sector > title.p_cell_play[p_dvd->i_prg_cell].i_end_sector )
1114     {
1115         p_dvd->i_prg_cell++;
1116
1117         if( DVDChooseAngle( p_dvd ) < 0 )
1118         {
1119             return -1;
1120         }
1121     }
1122
1123     if( DVDFindCell( p_dvd ) < 0 )
1124     {
1125         intf_ErrMsg( "dvd error: can't find sector" );
1126         return -1;
1127     }
1128
1129     /* Find start and end sectors of new cell */
1130 #if 1
1131     p_dvd->i_sector = MAX(
1132          p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_start_sector,
1133          title.p_cell_play[p_dvd->i_prg_cell].i_start_sector );
1134     p_dvd->i_end_sector = MIN(
1135          p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector,
1136          title.p_cell_play[p_dvd->i_prg_cell].i_end_sector );
1137 #else
1138     p_dvd->i_sector = title.p_cell_play[p_dvd->i_prg_cell].i_start_sector;
1139     p_dvd->i_end_sector = title.p_cell_play[p_dvd->i_prg_cell].i_end_sector;
1140 #endif
1141
1142 /*
1143     intf_WarnMsg( 7, "cell: %d sector1: 0x%x end1: 0x%x\n"
1144                    "index: %d sector2: 0x%x end2: 0x%x\n"
1145                    "category: 0x%x ilvu end: 0x%x vobu start 0x%x",
1146         p_dvd->i_cell,
1147         p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_start_sector,
1148         p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector,
1149         p_dvd->i_prg_cell,
1150         title.p_cell_play[p_dvd->i_prg_cell].i_start_sector,
1151         title.p_cell_play[p_dvd->i_prg_cell].i_end_sector,
1152         title.p_cell_play[p_dvd->i_prg_cell].i_category,
1153         title.p_cell_play[p_dvd->i_prg_cell].i_first_ilvu_vobu_esector,
1154         title.p_cell_play[p_dvd->i_prg_cell].i_last_vobu_start_sector );
1155 */
1156
1157     return 0;
1158 }
1159
1160 /*****************************************************************************
1161  * DVDChapterSelect: find the cell corresponding to requested chapter
1162  *****************************************************************************/
1163 static int DVDChapterSelect( thread_dvd_data_t * p_dvd, int i_chapter )
1164 {
1165
1166     /* Find cell index in Program chain for current chapter */
1167     p_dvd->i_prg_cell = title.chapter_map.pi_start_cell[i_chapter-1] - 1;
1168     p_dvd->i_cell = 0;
1169     p_dvd->i_sector = 0;
1170
1171     DVDChooseAngle( p_dvd );
1172
1173     /* Search for cell_index in cell adress_table and initialize
1174      * start sector */
1175     if( DVDFindSector( p_dvd ) < 0 )
1176     {
1177         intf_ErrMsg( "dvd error: can't select chapter" );
1178         return -1;
1179     }
1180
1181     /* start is : beginning of vts vobs + offset to vob x */
1182     p_dvd->i_start = p_dvd->i_title_start + p_dvd->i_sector;
1183
1184     /* Position the fd pointer on the right address */
1185     p_dvd->i_start = dvdcss_seek( p_dvd->dvdhandle, p_dvd->i_start );
1186
1187     p_dvd->i_chapter = i_chapter;
1188     return 0;
1189 }
1190
1191 /*****************************************************************************
1192  * DVDChooseAngle: select the cell corresponding to the selected angle
1193  *****************************************************************************/
1194 static int DVDChooseAngle( thread_dvd_data_t * p_dvd )
1195 {
1196     /* basic handling of angles */
1197     switch( ( ( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1198                     >> 12 ) )
1199     {
1200         /* we enter a muli-angle section */
1201         case 0x5:
1202             p_dvd->i_prg_cell += p_dvd->i_angle - 1;
1203             p_dvd->i_angle_cell = 0;
1204             break;
1205         /* we exit a multi-angle section */
1206         case 0x9:
1207         case 0xd:
1208             p_dvd->i_prg_cell += p_dvd->i_angle_nb - p_dvd->i_angle;
1209             break;
1210     }
1211
1212     return 0;
1213 }
1214
1215 #undef title