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 1.84 2001/08/06 13:28:00 sam 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 #ifdef GOD_DAMN_DMCA
  63 #   include "dummy_dvdcss.h"
  64 #else
  65 #   include <videolan/dvdcss.h>
  66 #endif
  67
  68 #include "config.h"
  69 #include "common.h"
  70 #include "threads.h"
  71 #include "mtime.h"
  72 #include "tests.h"
  73
  74 #if defined( WIN32 )
  75 #   include "input_iovec.h"
  76 #endif
  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 #include "input_ext-plugins.h"
  86
  87 #include "input_dvd.h"
  88 #include "dvd_netlist.h"
  89 #include "dvd_ifo.h"
  90 #include "dvd_summary.h"
  91
  92 #include "debug.h"
  93
  94 #include "modules.h"
  95 #include "modules_export.h"
  96
  97 /* how many blocks DVDRead will read in each loop */
  98 #define DVD_BLOCK_READ_ONCE 64
  99 #define DVD_DATA_READ_ONCE  (4 * DVD_BLOCK_READ_ONCE)
 100
 101 /* Size of netlist */
 102 #define DVD_NETLIST_SIZE    256
 103
 104 /*****************************************************************************
 105  * Local prototypes
 106  *****************************************************************************/
 107 /* called from outside */
 108 static int  DVDProbe    ( probedata_t *p_data );
 109 static void DVDInit     ( struct input_thread_s * );
 110 static void DVDEnd      ( struct input_thread_s * );
 111 static void DVDOpen     ( struct input_thread_s * );
 112 static void DVDClose    ( 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             = DVDOpen;
 134     input.pf_close            = DVDClose;
 135     input.pf_end              = DVDEnd;
 136     input.pf_init_bit_stream  = InitBitstream;
 137     input.pf_read             = DVDRead;
 138     input.pf_set_area         = DVDSetArea;
 139     input.pf_demux            = input_DemuxPS;
 140     input.pf_new_packet       = DVDNewPacket;
 141     input.pf_new_pes          = DVDNewPES;
 142     input.pf_delete_packet    = DVDDeletePacket;
 143     input.pf_delete_pes       = DVDDeletePES;
 144     input.pf_rewind           = DVDRewind;
 145     input.pf_seek             = DVDSeek;
 146 #undef input
 147 }
 148
 149 /*
 150  * Data reading functions
 151  */
 152
 153 /*****************************************************************************
 154  * DVDProbe: verifies that the stream is a PS stream
 155  *****************************************************************************/
 156 static int DVDProbe( probedata_t *p_data )
 157 {
 158     input_thread_t * p_input = (input_thread_t *)p_data;
 159
 160     char * psz_name = p_input->p_source;
 161     int i_score = 5;
 162
 163     if( TestMethod( INPUT_METHOD_VAR, "dvd" ) )
 164     {
 165         return( 999 );
 166     }
 167
 168     if( ( strlen(psz_name) > 4 ) && !strncasecmp( psz_name, "dvd:", 4 ) )
 169     {
 170         /* If the user specified "dvd:" then it's probably a DVD */
 171         i_score = 100;
 172         psz_name += 4;
 173     }
 174
 175     return( i_score );
 176 }
 177
 178 /*****************************************************************************
 179  * DVDInit: initializes DVD structures
 180  *****************************************************************************/
 181 static void DVDInit( input_thread_t * p_input )
 182 {
 183     thread_dvd_data_t *  p_dvd;
 184     input_area_t *       p_area;
 185     int                  i_title;
 186     int                  i_chapter;
 187     int                  i;
 188
 189     p_dvd = malloc( sizeof(thread_dvd_data_t) );
 190     if( p_dvd == NULL )
 191     {
 192         intf_ErrMsg( "dvd error: out of memory" );
 193         p_input->b_error = 1;
 194         return;
 195     }
 196
 197     p_input->p_plugin_data = (void *)p_dvd;
 198     p_input->p_method_data = NULL;
 199
 200     p_dvd->dvdhandle = (dvdcss_handle) p_input->i_handle;
 201
 202     dvdcss_seek( p_dvd->dvdhandle, 0 );
 203
 204     /* We read DVD_BLOCK_READ_ONCE in each loop, so the input will receive
 205      * DVD_DATA_READ_ONCE at most */
 206     p_dvd->i_block_once = DVD_BLOCK_READ_ONCE;
 207     /* this value mustn't be modifed */
 208     p_input->i_read_once = DVD_DATA_READ_ONCE;
 209
 210     /* Reading structures initialisation */
 211     p_input->p_method_data =
 212         DVDNetlistInit( DVD_NETLIST_SIZE, 2 * DVD_NETLIST_SIZE,
 213                         DVD_NETLIST_SIZE, DVD_LB_SIZE, p_dvd->i_block_once );
 214     intf_WarnMsg( 2, "dvd info: netlist initialized" );
 215
 216     /* Ifo allocation & initialisation */
 217     if( IfoCreate( p_dvd ) < 0 )
 218     {
 219         intf_ErrMsg( "dvd error: allcation error in ifo" );
 220         dvdcss_close( p_dvd->dvdhandle );
 221         free( p_dvd );
 222         p_input->b_error = 1;
 223         return;
 224     }
 225
 226     if( IfoInit( p_dvd->p_ifo ) < 0 )
 227     {
 228         intf_ErrMsg( "dvd error: fatal failure in ifo" );
 229         IfoDestroy( p_dvd->p_ifo );
 230         dvdcss_close( p_dvd->dvdhandle );
 231         free( p_dvd );
 232         p_input->b_error = 1;
 233         return;
 234     }
 235
 236     /* Set stream and area data */
 237     vlc_mutex_lock( &p_input->stream.stream_lock );
 238
 239     /* Initialize ES structures */
 240     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 241
 242     /* disc input method */
 243     p_input->stream.i_method = INPUT_METHOD_DVD;
 244
 245 #define title_inf p_dvd->p_ifo->vmg.title_inf
 246     intf_WarnMsg( 2, "dvd info: number of titles: %d", title_inf.i_title_nb );
 247
 248 #define area p_input->stream.pp_areas
 249     /* We start from 1 here since the default area 0
 250      * is reserved for video_ts.vob */
 251     for( i = 1 ; i <= title_inf.i_title_nb ; i++ )
 252     {
 253         input_AddArea( p_input );
 254
 255         /* Titles are Program Chains */
 256         area[i]->i_id = i;
 257
 258         /* Absolute start offset and size
 259          * We can only set that with vts ifo, so we do it during the
 260          * first call to DVDSetArea */
 261         area[i]->i_start = 0;
 262         area[i]->i_size = 0;
 263
 264         /* Number of chapters */
 265         area[i]->i_part_nb = title_inf.p_attr[i-1].i_chapter_nb;
 266         area[i]->i_part = 1;
 267
 268         /* Number of angles */
 269         area[i]->i_angle_nb = 0;
 270         area[i]->i_angle = 1;
 271
 272         /* Offset to vts_i_0.ifo */
 273         area[i]->i_plugin_data = p_dvd->p_ifo->i_start +
 274                        title_inf.p_attr[i-1].i_start_sector;
 275     }
 276 #undef area
 277
 278     /* Get requested title - if none try the first title */
 279     i_title = main_GetIntVariable( INPUT_TITLE_VAR, 1 );
 280     if( i_title <= 0 || i_title > title_inf.i_title_nb )
 281     {
 282         i_title = 1;
 283     }
 284
 285 #undef title_inf
 286
 287     /* Get requested chapter - if none defaults to first one */
 288     i_chapter = main_GetIntVariable( INPUT_CHAPTER_VAR, 1 );
 289     if( i_chapter <= 0 )
 290     {
 291         i_chapter = 1;
 292     }
 293
 294     p_input->stream.pp_areas[i_title]->i_part = i_chapter;
 295
 296     p_area = p_input->stream.pp_areas[i_title];
 297
 298     /* set title, chapter, audio and subpic */
 299     DVDSetArea( p_input, p_area );
 300
 301     vlc_mutex_unlock( &p_input->stream.stream_lock );
 302
 303     return;
 304 }
 305
 306 /*****************************************************************************
 307  * DVDOpen: open dvd
 308  *****************************************************************************/
 309 static void DVDOpen( struct input_thread_s *p_input )
 310 {
 311     dvdcss_handle dvdhandle;
 312
 313     vlc_mutex_lock( &p_input->stream.stream_lock );
 314
 315     /* If we are here we can control the pace... */
 316     p_input->stream.b_pace_control = 1;
 317
 318     p_input->stream.b_seekable = 1;
 319     p_input->stream.p_selected_area->i_size = 0;
 320
 321     p_input->stream.p_selected_area->i_tell = 0;
 322
 323     vlc_mutex_unlock( &p_input->stream.stream_lock );
 324
 325     /* XXX: put this shit in an access plugin */
 326     if( strlen( p_input->p_source ) > 4
 327          && !strncasecmp( p_input->p_source, "dvd:", 4 ) )
 328     {
 329         dvdhandle = dvdcss_open( p_input->p_source + 4, DVDCSS_INIT_QUIET );
 330     }
 331     else
 332     {
 333         dvdhandle = dvdcss_open( p_input->p_source, DVDCSS_INIT_QUIET );
 334     }
 335
 336     if( dvdhandle == NULL )
 337     {
 338         p_input->b_error = 1;
 339         return;
 340     }
 341
 342     p_input->i_handle = (int) dvdhandle;
 343 }
 344
 345 /*****************************************************************************
 346  * DVDClose: close dvd
 347  *****************************************************************************/
 348 static void DVDClose( struct input_thread_s *p_input )
 349 {
 350     /* Clean up libdvdcss */
 351     dvdcss_close( (dvdcss_handle) p_input->i_handle );
 352 }
 353
 354 /*****************************************************************************
 355  * DVDEnd: frees unused data
 356  *****************************************************************************/
 357 static void DVDEnd( input_thread_t * p_input )
 358 {
 359     thread_dvd_data_t *     p_dvd;
 360     dvd_netlist_t *         p_netlist;
 361
 362     p_dvd = (thread_dvd_data_t*)p_input->p_plugin_data;
 363     p_netlist = (dvd_netlist_t *)p_input->p_method_data;
 364
 365     IfoDestroy( p_dvd->p_ifo );
 366
 367     free( p_dvd );
 368
 369     DVDNetlistEnd( p_netlist );
 370 }
 371
 372 /*****************************************************************************
 373  * DVDSetArea: initialize input data for title x, chapter y.
 374  * It should be called for each user navigation request.
 375  *****************************************************************************
 376  * Take care that i_title starts from 0 (vmg) and i_chapter start from 1.
 377  * Note that you have to take the lock before entering here.
 378  *****************************************************************************/
 379 static int DVDSetArea( input_thread_t * p_input, input_area_t * p_area )
 380 {
 381     thread_dvd_data_t *  p_dvd;
 382     es_descriptor_t *    p_es;
 383     u16                  i_id;
 384     int                  i_vts_title;
 385     int                  i_audio;
 386     int                  i_spu;
 387     int                  i;
 388
 389     p_dvd = (thread_dvd_data_t*)p_input->p_plugin_data;
 390
 391     /* we can't use the interface slider until initilization is complete */
 392     p_input->stream.b_seekable = 0;
 393
 394     if( p_area != p_input->stream.p_selected_area )
 395     {
 396         /* Reset the Chapter position of the old title */
 397         p_input->stream.p_selected_area->i_part = 0;
 398
 399         /*
 400          *  We have to load all title information
 401          */
 402         /* Change the default area */
 403         p_input->stream.p_selected_area =
 404                     p_input->stream.pp_areas[p_area->i_id];
 405
 406         /* title number: it is not vts nb!,
 407          * it is what appears in the interface list */
 408         p_dvd->i_title = p_area->i_id;
 409         p_dvd->p_ifo->i_title = p_dvd->i_title;
 410
 411         /* set number of chapters of current title */
 412         p_dvd->i_chapter_nb = p_area->i_part_nb;
 413
 414         /* ifo vts */
 415         if( IfoTitleSet( p_dvd->p_ifo ) < 0 )
 416         {
 417             intf_ErrMsg( "dvd error: fatal error in vts ifo" );
 418             free( p_dvd );
 419             p_input->b_error = 1;
 420             return -1;
 421         }
 422
 423 #define vmg p_dvd->p_ifo->vmg
 424 #define vts p_dvd->p_ifo->vts
 425         /* title position inside the selected vts */
 426         i_vts_title = vmg.title_inf.p_attr[p_dvd->i_title-1].i_title_num;
 427         p_dvd->i_title_id =
 428             vts.title_inf.p_title_start[i_vts_title-1].i_title_id;
 429
 430         intf_WarnMsgImm( 3, "dvd: title %d vts_title %d pgc %d",
 431                          p_dvd->i_title, i_vts_title, p_dvd->i_title_id );
 432
 433         /*
 434          * Tell libdvdcss we changed title
 435          */
 436         dvdcss_title( p_dvd->dvdhandle,
 437                       vts.i_pos + vts.manager_inf.i_title_vob_start_sector );
 438
 439         /*
 440          * Angle management
 441          */
 442         p_dvd->i_angle_nb = vmg.title_inf.p_attr[p_dvd->i_title-1].i_angle_nb;
 443         p_dvd->i_angle = main_GetIntVariable( INPUT_ANGLE_VAR, 1 );
 444         if( ( p_dvd->i_angle <= 0 ) || p_dvd->i_angle > p_dvd->i_angle_nb )
 445         {
 446             p_dvd->i_angle = 1;
 447         }
 448
 449         /*
 450          * Set selected title start and size
 451          */
 452
 453         /* title set offset XXX: convert to block values */
 454         p_dvd->i_title_start =
 455             vts.i_pos + vts.manager_inf.i_title_vob_start_sector;
 456
 457         /* last video cell */
 458         p_dvd->i_cell = 0;
 459         p_dvd->i_prg_cell = -1 +
 460             vts.title_unit.p_title[p_dvd->i_title_id-1].title.i_cell_nb;
 461
 462         if( DVDFindCell( p_dvd ) < 0 )
 463         {
 464             intf_ErrMsg( "dvd error: can't find title end" );
 465             p_input->b_error = 1;
 466             return -1;
 467         }
 468
 469         /* temporary hack to fix size in some dvds */
 470         if( p_dvd->i_cell >= vts.cell_inf.i_cell_nb )
 471         {
 472             p_dvd->i_cell = vts.cell_inf.i_cell_nb - 1;
 473         }
 474
 475         p_dvd->i_sector = 0;
 476         p_dvd->i_size = vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector;
 477
 478         if( DVDChapterSelect( p_dvd, 1 ) < 0 )
 479         {
 480             intf_ErrMsg( "dvd error: can't find first chapter" );
 481             p_input->b_error = 1;
 482             return -1;
 483         }
 484
 485         p_dvd->i_size -= p_dvd->i_sector + 1;
 486
 487         IfoPrintTitle( p_dvd );
 488
 489         /* Area definition */
 490         p_input->stream.p_selected_area->i_start = LB2OFF( p_dvd->i_start );
 491         p_input->stream.p_selected_area->i_size = LB2OFF( p_dvd->i_size );
 492         p_input->stream.p_selected_area->i_angle_nb = p_dvd->i_angle_nb;
 493         p_input->stream.p_selected_area->i_angle = p_dvd->i_angle;
 494
 495 #if 0
 496         /* start at the beginning of the title */
 497         /* FIXME: create a conf option to select whether to restart
 498          * title or not */
 499         p_input->stream.p_selected_area->i_tell = 0;
 500         p_input->stream.p_selected_area->i_part = 1;
 501 #endif
 502
 503         /*
 504          * Destroy obsolete ES by reinitializing program 0
 505          * and find all ES in title with ifo data
 506          */
 507         if( p_input->stream.pp_programs != NULL )
 508         {
 509             /* We don't use input_EndStream here since
 510              * we keep area structures */
 511
 512             for( i = 0 ; i < p_input->stream.i_selected_es_number ; i++ )
 513             {
 514                 input_UnselectES( p_input, p_input->stream.pp_selected_es[i] );
 515             }
 516
 517             input_DelProgram( p_input, p_input->stream.pp_programs[0] );
 518
 519             p_input->stream.pp_selected_es = NULL;
 520             p_input->stream.i_selected_es_number = 0;
 521         }
 522
 523         input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
 524
 525         /* No PSM to read in DVD mode, we already have all information */
 526         p_input->stream.pp_programs[0]->b_is_ok = 1;
 527
 528         p_es = NULL;
 529
 530         /* ES 0 -> video MPEG2 */
 531         IfoPrintVideo( p_dvd );
 532
 533         p_es = input_AddES( p_input, p_input->stream.pp_programs[0], 0xe0, 0 );
 534         p_es->i_stream_id = 0xe0;
 535         p_es->i_type = MPEG2_VIDEO_ES;
 536         p_es->i_cat = VIDEO_ES;
 537         if( p_main->b_video )
 538         {
 539             input_SelectES( p_input, p_es );
 540         }
 541
 542 #define audio_status \
 543     vts.title_unit.p_title[p_dvd->i_title_id-1].title.pi_audio_status[i-1]
 544         /* Audio ES, in the order they appear in .ifo */
 545         for( i = 1 ; i <= vts.manager_inf.i_audio_nb ; i++ )
 546         {
 547             IfoPrintAudio( p_dvd, i );
 548
 549             /* audio channel is active if first byte is 0x80 */
 550             if( audio_status.i_available )
 551             {
 552                 switch( vts.manager_inf.p_audio_attr[i-1].i_coding_mode )
 553                 {
 554                 case 0x00:              /* AC3 */
 555                     i_id = ( ( 0x80 + audio_status.i_position ) << 8 ) | 0xbd;
 556                     p_es = input_AddES( p_input,
 557                                p_input->stream.pp_programs[0], i_id, 0 );
 558                     p_es->i_stream_id = 0xbd;
 559                     p_es->i_type = AC3_AUDIO_ES;
 560                     p_es->b_audio = 1;
 561                     p_es->i_cat = AUDIO_ES;
 562                     strcpy( p_es->psz_desc, IfoLanguage( hton16(
 563                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 564                     strcat( p_es->psz_desc, " (ac3)" );
 565
 566                     break;
 567                 case 0x02:
 568                 case 0x03:              /* MPEG audio */
 569                     i_id = 0xc0 + audio_status.i_position;
 570                     p_es = input_AddES( p_input,
 571                                     p_input->stream.pp_programs[0], i_id, 0 );
 572                     p_es->i_stream_id = i_id;
 573                     p_es->i_type = MPEG2_AUDIO_ES;
 574                     p_es->b_audio = 1;
 575                     p_es->i_cat = AUDIO_ES;
 576                     strcpy( p_es->psz_desc, IfoLanguage( hton16(
 577                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 578                     strcat( p_es->psz_desc, " (mpeg)" );
 579
 580                     break;
 581                 case 0x04:              /* LPCM */
 582
 583                     i_id = ( ( 0xa0 + audio_status.i_position ) << 8 ) | 0xbd;
 584                     p_es = input_AddES( p_input,
 585                                     p_input->stream.pp_programs[0], i_id, 0 );
 586                     p_es->i_stream_id = i_id;
 587                     p_es->i_type = LPCM_AUDIO_ES;
 588                     p_es->b_audio = 1;
 589                     p_es->i_cat = AUDIO_ES;
 590                     strcpy( p_es->psz_desc, IfoLanguage( hton16(
 591                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 592                     strcat( p_es->psz_desc, " (lpcm)" );
 593
 594                     break;
 595                 case 0x06:              /* DTS */
 596                     i_id = ( ( 0x88 + audio_status.i_position ) << 8 ) | 0xbd;
 597                     intf_ErrMsg( "dvd warning: DTS audio not handled yet"
 598                                  "(0x%x)", i_id );
 599                     break;
 600                 default:
 601                     i_id = 0;
 602                     intf_ErrMsg( "dvd warning: unknown audio type %.2x",
 603                              vts.manager_inf.p_audio_attr[i-1].i_coding_mode );
 604                 }
 605             }
 606         }
 607 #undef audio_status
 608 #define spu_status \
 609     vts.title_unit.p_title[p_dvd->i_title_id-1].title.pi_spu_status[i-1]
 610
 611         /* Sub Picture ES */
 612
 613         for( i = 1 ; i <= vts.manager_inf.i_spu_nb; i++ )
 614         {
 615             IfoPrintSpu( p_dvd, i );
 616
 617             if( spu_status.i_available )
 618             {
 619                 /*  there are several streams for one spu */
 620                 if(  vts.manager_inf.video_attr.i_ratio )
 621                 {
 622                     /* 16:9 */
 623                     switch( vts.manager_inf.video_attr.i_perm_displ )
 624                     {
 625                     case 1:
 626                         i_id = ( ( 0x20 + spu_status.i_position_pan ) << 8 )
 627                                | 0xbd;
 628                         break;
 629                     case 2:
 630                         i_id = ( ( 0x20 + spu_status.i_position_letter ) << 8 )
 631                                | 0xbd;
 632                         break;
 633                     default:
 634                         i_id = ( ( 0x20 + spu_status.i_position_wide ) << 8 )
 635                                | 0xbd;
 636                         break;
 637                     }
 638                 }
 639                 else
 640                 {
 641                     /* 4:3 */
 642                     i_id = ( ( 0x20 + spu_status.i_position_43 ) << 8 )
 643                            | 0xbd;
 644                 }
 645                 p_es = input_AddES( p_input,
 646                                     p_input->stream.pp_programs[0], i_id, 0 );
 647                 p_es->i_stream_id = 0xbd;
 648                 p_es->i_type = DVD_SPU_ES;
 649                 p_es->i_cat = SPU_ES;
 650                 strcpy( p_es->psz_desc, IfoLanguage( hton16(
 651                     vts.manager_inf.p_spu_attr[i-1].i_lang_code ) ) );
 652             }
 653         }
 654 #undef spu_status
 655         if( p_main->b_audio )
 656         {
 657             /* For audio: first one if none or a not existing one specified */
 658             i_audio = main_GetIntVariable( INPUT_CHANNEL_VAR, 1 );
 659             if( i_audio < 0 || i_audio > vts.manager_inf.i_audio_nb )
 660             {
 661                 main_PutIntVariable( INPUT_CHANNEL_VAR, 1 );
 662                 i_audio = 1;
 663             }
 664             if( i_audio > 0 && vts.manager_inf.i_audio_nb > 0 )
 665             {
 666                 input_SelectES( p_input, p_input->stream.pp_es[i_audio] );
 667             }
 668         }
 669
 670         if( p_main->b_video )
 671         {
 672             /* for spu, default is none */
 673             i_spu = main_GetIntVariable( INPUT_SUBTITLE_VAR, 0 );
 674             if( i_spu < 0 || i_spu > vts.manager_inf.i_spu_nb )
 675             {
 676                 main_PutIntVariable( INPUT_SUBTITLE_VAR, 0 );
 677                 i_spu = 0;
 678             }
 679             if( i_spu > 0 && vts.manager_inf.i_spu_nb > 0 )
 680             {
 681                 i_spu += vts.manager_inf.i_audio_nb;
 682                 input_SelectES( p_input, p_input->stream.pp_es[i_spu] );
 683             }
 684         }
 685     } /* i_title >= 0 */
 686     else
 687     {
 688         p_area = p_input->stream.p_selected_area;
 689     }
 690 #undef vts
 691 #undef vmg
 692
 693     /*
 694      * Chapter selection
 695      */
 696
 697     if( p_area->i_part != p_dvd->i_chapter )
 698     {
 699         if( ( p_area->i_part > 0 ) &&
 700             ( p_area->i_part <= p_area->i_part_nb ))
 701         {
 702             if( DVDChapterSelect( p_dvd, p_area->i_part ) < 0 )
 703             {
 704                 intf_ErrMsg( "dvd error: can't set chapter in area" );
 705                 p_input->b_error = 1;
 706                 return -1;
 707             }
 708
 709             p_input->stream.p_selected_area->i_tell =
 710                                    LB2OFF( p_dvd->i_start ) - p_area->i_start;
 711             p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 712
 713             intf_WarnMsg( 4, "dvd info: chapter %d start at: %lld",
 714                                         p_area->i_part, p_area->i_tell );
 715         }
 716         else
 717         {
 718             p_area->i_part = 1;
 719             p_dvd->i_chapter = 1;
 720         }
 721     }
 722
 723 #define title \
 724     p_dvd->p_ifo->vts.title_unit.p_title[p_dvd->i_title_id-1].title
 725     if( p_area->i_angle != p_dvd->i_angle )
 726     {
 727         if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
 728         {
 729             if( ( p_area->i_angle - p_dvd->i_angle ) < 0 )
 730             {
 731                 p_dvd->i_cell = 0;
 732             }
 733             p_dvd->i_prg_cell += ( p_area->i_angle - p_dvd->i_angle );
 734             p_dvd->i_angle = p_area->i_angle;
 735
 736             DVDFindSector( p_dvd );
 737             p_dvd->i_cell += p_dvd->i_angle_cell;
 738         }
 739         else
 740         {
 741             p_dvd->i_angle = p_area->i_angle;
 742         }
 743
 744         intf_WarnMsg( 3, "dvd info: angle %d selected", p_area->i_angle );
 745     }
 746
 747     /* warn interface that something has changed */
 748     p_input->stream.b_seekable = 1;
 749     p_input->stream.b_changed = 1;
 750
 751     return 0;
 752 }
 753
 754
 755 /*****************************************************************************
 756  * DVDRead: reads data packets into the netlist.
 757  *****************************************************************************
 758  * Returns -1 in case of error, 0 if everything went well, and 1 in case of
 759  * EOF.
 760  *****************************************************************************/
 761 static int DVDRead( input_thread_t * p_input,
 762                     data_packet_t ** pp_packets )
 763 {
 764     thread_dvd_data_t *     p_dvd;
 765     dvd_netlist_t *         p_netlist;
 766     struct iovec *          p_vec;
 767     struct data_packet_s *  pp_data[DVD_DATA_READ_ONCE];
 768     u8 *                    pi_cur;
 769     int                     i_block_once;
 770     int                     i_packet_size;
 771     int                     i_iovec;
 772     int                     i_packet;
 773     int                     i_pos;
 774     int                     i_read_blocks;
 775     int                     i_sector;
 776     boolean_t               b_eof;
 777     boolean_t               b_eot;
 778     boolean_t               b_eoc;
 779
 780     p_dvd = (thread_dvd_data_t *)p_input->p_plugin_data;
 781     p_netlist = (dvd_netlist_t *)p_input->p_method_data;
 782
 783     b_eoc = 0;
 784     i_sector = p_dvd->i_title_start + p_dvd->i_sector;
 785     i_block_once = p_dvd->i_end_sector - p_dvd->i_sector + 1;
 786
 787     /* Get the position of the next cell if we're at cell end */
 788     if( i_block_once <= 0 )
 789     {
 790         int     i_angle;
 791
 792         p_dvd->i_cell++;
 793         p_dvd->i_angle_cell++;
 794
 795         /* Find cell index in adress map */
 796         if( DVDFindSector( p_dvd ) < 0 )
 797         {
 798             pp_packets[0] = NULL;
 799             intf_ErrMsg( "dvd error: can't find next cell" );
 800             return 1;
 801         }
 802
 803         /* Position the fd pointer on the right address */
 804         i_sector = dvdcss_seek( p_dvd->dvdhandle,
 805                                 p_dvd->i_title_start + p_dvd->i_sector );
 806
 807         /* update chapter : it will be easier when we have navigation
 808          * ES support */
 809         if( p_dvd->i_chapter < ( p_dvd->i_chapter_nb - 1 ) )
 810         {
 811             if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
 812             {
 813                 i_angle = p_dvd->i_angle - 1;
 814             }
 815             else
 816             {
 817                 i_angle = 0;
 818             }
 819             if( title.chapter_map.pi_start_cell[p_dvd->i_chapter] <=
 820                 ( p_dvd->i_prg_cell - i_angle + 1 ) )
 821             {
 822                 p_dvd->i_chapter++;
 823                 b_eoc = 1;
 824             }
 825         }
 826
 827         i_block_once = p_dvd->i_end_sector - p_dvd->i_sector + 1;
 828     }
 829
 830     /* The number of blocks read is the max between the requested
 831      * value and the leaving block in the cell */
 832     if( i_block_once > p_dvd->i_block_once )
 833     {
 834         i_block_once = p_dvd->i_block_once;
 835     }
 836 /*
 837 intf_WarnMsg( 2, "Sector: 0x%x Read: %d Chapter: %d", p_dvd->i_sector, i_block_once, p_dvd->i_chapter );
 838 */
 839     p_netlist->i_read_once = i_block_once;
 840
 841     /* Get an iovec pointer */
 842     if( ( p_vec = DVDGetiovec( p_netlist ) ) == NULL )
 843     {
 844         intf_ErrMsg( "dvd error: can't get iovec" );
 845         return -1;
 846     }
 847
 848     /* Reads from DVD */
 849     i_read_blocks = dvdcss_readv( p_dvd->dvdhandle, p_vec,
 850                                   i_block_once, DVDCSS_READ_DECRYPT );
 851
 852     /* Update netlist indexes: we don't do it in DVDGetiovec since we
 853      * need know the real number of blocks read */
 854     DVDMviovec( p_netlist, i_read_blocks, pp_data );
 855
 856     /* Update global position */
 857     p_dvd->i_sector += i_read_blocks;
 858
 859     i_packet = 0;
 860
 861     /* Read headers to compute payload length */
 862     for( i_iovec = 0 ; i_iovec < i_read_blocks ; i_iovec++ )
 863     {
 864         i_pos = 0;
 865
 866         while( i_pos < p_netlist->i_buffer_size )
 867         {
 868             pi_cur = (u8*)p_vec[i_iovec].iov_base + i_pos;
 869
 870             /*default header */
 871             if( U32_AT( pi_cur ) != 0x1BA )
 872             {
 873                 /* That's the case for all packets, except pack header. */
 874                 i_packet_size = U16_AT( pi_cur + 4 );
 875                 pp_packets[i_packet] = DVDNewPtr( p_netlist );
 876             }
 877             else
 878             {
 879                 /* MPEG-2 Pack header. */
 880                 i_packet_size = 8;
 881                 pp_packets[i_packet] = pp_data[i_iovec];
 882
 883             }
 884
 885             (*pp_data[i_iovec]->pi_refcount)++;
 886
 887             pp_packets[i_packet]->pi_refcount = pp_data[i_iovec]->pi_refcount;
 888
 889             pp_packets[i_packet]->p_buffer = pp_data[i_iovec]->p_buffer;
 890
 891             pp_packets[i_packet]->p_payload_start =
 892                     pp_packets[i_packet]->p_buffer + i_pos;
 893
 894             pp_packets[i_packet]->p_payload_end =
 895                     pp_packets[i_packet]->p_payload_start + i_packet_size + 6;
 896
 897             pp_packets[i_packet]->p_next = NULL;
 898             pp_packets[i_packet]->b_discard_payload = 0;
 899
 900             i_packet++;
 901             i_pos += i_packet_size + 6;
 902         }
 903     }
 904
 905     pp_packets[i_packet] = NULL;
 906
 907     vlc_mutex_lock( &p_input->stream.stream_lock );
 908
 909     p_input->stream.p_selected_area->i_tell =
 910         LB2OFF( i_sector + i_read_blocks ) -
 911         p_input->stream.p_selected_area->i_start;
 912     if( b_eoc )
 913     {
 914         /* We modify i_part only at end of chapter not to erase
 915          * some modification from the interface */
 916         p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 917     }
 918
 919     b_eot = !( p_input->stream.p_selected_area->i_tell
 920                   < p_input->stream.p_selected_area->i_size );
 921     b_eof = b_eot && ( ( p_dvd->i_title + 1 ) >= p_input->stream.i_area_nb );
 922
 923     if( b_eof )
 924     {
 925         vlc_mutex_unlock( &p_input->stream.stream_lock );
 926         return 1;
 927     }
 928
 929     if( b_eot )
 930     {
 931         intf_WarnMsg( 4, "dvd info: new title" );
 932         p_dvd->i_title++;
 933         DVDSetArea( p_input, p_input->stream.pp_areas[p_dvd->i_title] );
 934         vlc_mutex_unlock( &p_input->stream.stream_lock );
 935         return 0;
 936     }
 937
 938     vlc_mutex_unlock( &p_input->stream.stream_lock );
 939
 940     if( i_read_blocks == i_block_once )
 941     {
 942         return 0;
 943     }
 944
 945     return -1;
 946 }
 947
 948 /*****************************************************************************
 949  * DVDRewind : reads a stream backward
 950  *****************************************************************************/
 951 static int DVDRewind( input_thread_t * p_input )
 952 {
 953     return( -1 );
 954 }
 955
 956 /*****************************************************************************
 957  * DVDSeek : Goes to a given position on the stream.
 958  *****************************************************************************
 959  * This one is used by the input and translate chronological position from
 960  * input to logical position on the device.
 961  * The lock should be taken before calling this function.
 962  *****************************************************************************/
 963 static void DVDSeek( input_thread_t * p_input, off_t i_off )
 964 {
 965     thread_dvd_data_t *     p_dvd;
 966     int                     i_prg_cell;
 967     int                     i_cell;
 968     int                     i_chapter;
 969     int                     i_angle;
 970
 971     p_dvd = ( thread_dvd_data_t * )p_input->p_plugin_data;
 972
 973     /* we have to take care of offset of beginning of title */
 974     p_dvd->i_sector = OFF2LB(i_off + p_input->stream.p_selected_area->i_start)
 975                        - p_dvd->i_title_start;
 976
 977     i_prg_cell = 0;
 978     i_chapter = 0;
 979
 980     /* parse vobu address map to find program cell */
 981     while( title.p_cell_play[i_prg_cell].i_end_sector < p_dvd->i_sector  )
 982     {
 983         i_prg_cell++;
 984     }
 985
 986     p_dvd->i_prg_cell = i_prg_cell;
 987
 988     if( DVDChooseAngle( p_dvd ) < 0 )
 989     {
 990         p_input->b_error = 1;
 991         return;
 992     }
 993
 994     p_dvd->i_cell = 0;
 995
 996     /* Find first title cell which is inside program cell */
 997     if( DVDFindCell( p_dvd ) < 0 )
 998     {
 999         /* no following cell : we're at eof */
1000         intf_ErrMsg( "dvd error: cell seeking failed" );
1001         p_input->b_error = 1;
1002         return;
1003     }
1004
1005     i_cell = p_dvd->i_cell;
1006
1007 #define cell p_dvd->p_ifo->vts.cell_inf.p_cell_map[i_cell]
1008     /* parse cell address map to find title cell containing sector */
1009     while( cell.i_end_sector < p_dvd->i_sector )
1010     {
1011         i_cell++;
1012     }
1013
1014     p_dvd->i_cell = i_cell;
1015
1016     /* if we're inside a multi-angle zone, we have to choose i_sector
1017      * in the current angle ; we can't do it all the time since cells
1018      * can be very wide out of such zones */
1019     if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1020     {
1021         p_dvd->i_sector = MAX(
1022                 cell.i_start_sector,
1023                 title.p_cell_play[p_dvd->i_prg_cell].i_start_sector );
1024     }
1025
1026     p_dvd->i_end_sector = MIN(
1027             cell.i_end_sector,
1028             title.p_cell_play[p_dvd->i_prg_cell].i_end_sector );
1029 #undef cell
1030     /* update chapter */
1031     if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1032     {
1033         i_angle = p_dvd->i_angle - 1;
1034     }
1035     else
1036     {
1037         i_angle = 0;
1038     }
1039     if( p_dvd->i_chapter_nb > 1 )
1040     {
1041         while( ( title.chapter_map.pi_start_cell[i_chapter] <=
1042                     ( p_dvd->i_prg_cell - i_angle + 1 ) ) &&
1043                ( i_chapter < ( p_dvd->i_chapter_nb - 1 ) ) )
1044         {
1045             i_chapter++;
1046         }
1047     }
1048     else
1049     {
1050         i_chapter = 1;
1051     }
1052
1053     p_dvd->i_chapter = i_chapter;
1054     p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
1055
1056     p_input->stream.p_selected_area->i_tell =
1057         LB2OFF ( dvdcss_seek( p_dvd->dvdhandle, p_dvd->i_title_start
1058                                                  + p_dvd->i_sector ) )
1059          - p_input->stream.p_selected_area->i_start;
1060
1061     intf_WarnMsg( 7, "Program Cell: %d Cell: %d Chapter: %d",
1062                      p_dvd->i_prg_cell, p_dvd->i_cell, p_dvd->i_chapter );
1063
1064
1065     return;
1066 }
1067
1068 #define cell  p_dvd->p_ifo->vts.cell_inf
1069
1070 /*****************************************************************************
1071  * DVDFindCell: adjust the title cell index with the program cell
1072  *****************************************************************************/
1073 static int DVDFindCell( thread_dvd_data_t * p_dvd )
1074 {
1075     int                 i_cell;
1076     int                 i_index;
1077
1078     i_cell = p_dvd->i_cell;
1079     i_index = p_dvd->i_prg_cell;
1080
1081     if( i_cell >= cell.i_cell_nb )
1082     {
1083         return -1;
1084     }
1085
1086     while( ( ( title.p_cell_pos[i_index].i_vob_id !=
1087                    cell.p_cell_map[i_cell].i_vob_id ) ||
1088       ( title.p_cell_pos[i_index].i_cell_id !=
1089                    cell.p_cell_map[i_cell].i_cell_id ) ) &&
1090            ( i_cell < cell.i_cell_nb - 1 ) )
1091     {
1092         i_cell++;
1093     }
1094
1095 /*
1096 intf_WarnMsg( 7, "FindCell: i_cell %d i_index %d found %d nb %d",
1097                     p_dvd->i_cell,
1098                     p_dvd->i_prg_cell,
1099                     i_cell,
1100                     cell.i_cell_nb );
1101 */
1102
1103     p_dvd->i_cell = i_cell;
1104
1105     return 0;
1106 }
1107
1108 #undef cell
1109
1110 /*****************************************************************************
1111  * DVDFindSector: find cell index in adress map from index in
1112  * information table program map and give corresponding sectors.
1113  *****************************************************************************/
1114 static int DVDFindSector( thread_dvd_data_t * p_dvd )
1115 {
1116
1117     if( p_dvd->i_sector > title.p_cell_play[p_dvd->i_prg_cell].i_end_sector )
1118     {
1119         p_dvd->i_prg_cell++;
1120
1121         if( DVDChooseAngle( p_dvd ) < 0 )
1122         {
1123             return -1;
1124         }
1125     }
1126
1127     if( DVDFindCell( p_dvd ) < 0 )
1128     {
1129         intf_ErrMsg( "dvd error: can't find sector" );
1130         return -1;
1131     }
1132
1133     /* Find start and end sectors of new cell */
1134 #if 1
1135     p_dvd->i_sector = MAX(
1136          p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_start_sector,
1137          title.p_cell_play[p_dvd->i_prg_cell].i_start_sector );
1138     p_dvd->i_end_sector = MIN(
1139          p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector,
1140          title.p_cell_play[p_dvd->i_prg_cell].i_end_sector );
1141 #else
1142     p_dvd->i_sector = title.p_cell_play[p_dvd->i_prg_cell].i_start_sector;
1143     p_dvd->i_end_sector = title.p_cell_play[p_dvd->i_prg_cell].i_end_sector;
1144 #endif
1145
1146 /*
1147     intf_WarnMsg( 7, "cell: %d sector1: 0x%x end1: 0x%x\n"
1148                    "index: %d sector2: 0x%x end2: 0x%x\n"
1149                    "category: 0x%x ilvu end: 0x%x vobu start 0x%x",
1150         p_dvd->i_cell,
1151         p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_start_sector,
1152         p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector,
1153         p_dvd->i_prg_cell,
1154         title.p_cell_play[p_dvd->i_prg_cell].i_start_sector,
1155         title.p_cell_play[p_dvd->i_prg_cell].i_end_sector,
1156         title.p_cell_play[p_dvd->i_prg_cell].i_category,
1157         title.p_cell_play[p_dvd->i_prg_cell].i_first_ilvu_vobu_esector,
1158         title.p_cell_play[p_dvd->i_prg_cell].i_last_vobu_start_sector );
1159 */
1160
1161     return 0;
1162 }
1163
1164 /*****************************************************************************
1165  * DVDChapterSelect: find the cell corresponding to requested chapter
1166  *****************************************************************************/
1167 static int DVDChapterSelect( thread_dvd_data_t * p_dvd, int i_chapter )
1168 {
1169
1170     /* Find cell index in Program chain for current chapter */
1171     p_dvd->i_prg_cell = title.chapter_map.pi_start_cell[i_chapter-1] - 1;
1172     p_dvd->i_cell = 0;
1173     p_dvd->i_sector = 0;
1174
1175     DVDChooseAngle( p_dvd );
1176
1177     /* Search for cell_index in cell adress_table and initialize
1178      * start sector */
1179     if( DVDFindSector( p_dvd ) < 0 )
1180     {
1181         intf_ErrMsg( "dvd error: can't select chapter" );
1182         return -1;
1183     }
1184
1185     /* start is : beginning of vts vobs + offset to vob x */
1186     p_dvd->i_start = p_dvd->i_title_start + p_dvd->i_sector;
1187
1188     /* Position the fd pointer on the right address */
1189     p_dvd->i_start = dvdcss_seek( p_dvd->dvdhandle, p_dvd->i_start );
1190
1191     p_dvd->i_chapter = i_chapter;
1192     return 0;
1193 }
1194
1195 /*****************************************************************************
1196  * DVDChooseAngle: select the cell corresponding to the selected angle
1197  *****************************************************************************/
1198 static int DVDChooseAngle( thread_dvd_data_t * p_dvd )
1199 {
1200     /* basic handling of angles */
1201     switch( ( ( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1202                     >> 12 ) )
1203     {
1204         /* we enter a muli-angle section */
1205         case 0x5:
1206             p_dvd->i_prg_cell += p_dvd->i_angle - 1;
1207             p_dvd->i_angle_cell = 0;
1208             break;
1209         /* we exit a multi-angle section */
1210         case 0x9:
1211         case 0xd:
1212             p_dvd->i_prg_cell += p_dvd->i_angle_nb - p_dvd->i_angle;
1213             break;
1214     }
1215
1216     return 0;
1217 }
1218
1219 #undef title