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 1.93 2001/11/11 01:32:03 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 #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 "iso_lang.h"
  73 #include "tests.h"
  74
  75 #if defined( WIN32 )
  76 #   include "input_iovec.h"
  77 #endif
  78
  79 #include "intf_msg.h"
  80
  81 #include "main.h"
  82
  83 #include "stream_control.h"
  84 #include "input_ext-intf.h"
  85 #include "input_ext-dec.h"
  86 #include "input_ext-plugins.h"
  87
  88 #include "input_dvd.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       = input_NetlistNewPacket;
 141     input.pf_new_pes          = input_NetlistNewPES;
 142     input.pf_delete_packet    = input_NetlistDeletePacket;
 143     input.pf_delete_pes       = input_NetlistDeletePES;
 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     if( dvdcss_seek( p_dvd->dvdhandle, 0, DVDCSS_NOFLAGS ) < 0 )
 203     {
 204         intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
 205         p_input->b_error = 1;
 206         return;
 207     }
 208
 209     /* We read DVD_BLOCK_READ_ONCE in each loop, so the input will receive
 210      * DVD_DATA_READ_ONCE at most */
 211     p_dvd->i_block_once = DVD_BLOCK_READ_ONCE;
 212     /* this value mustn't be modifed */
 213     p_input->i_read_once = DVD_DATA_READ_ONCE;
 214
 215     /* Reading structures initialisation */
 216     input_NetlistInit( p_input, DVD_NETLIST_SIZE, 2 * DVD_NETLIST_SIZE,
 217                        DVD_NETLIST_SIZE, DVD_LB_SIZE, p_dvd->i_block_once );
 218     intf_WarnMsg( 2, "dvd info: netlist initialized" );
 219
 220     /* Ifo allocation & initialisation */
 221     if( IfoCreate( p_dvd ) < 0 )
 222     {
 223         intf_ErrMsg( "dvd error: allcation error in ifo" );
 224         dvdcss_close( p_dvd->dvdhandle );
 225         free( p_dvd );
 226         p_input->b_error = 1;
 227         return;
 228     }
 229
 230     if( IfoInit( p_dvd->p_ifo ) < 0 )
 231     {
 232         intf_ErrMsg( "dvd error: fatal failure in ifo" );
 233         IfoDestroy( p_dvd->p_ifo );
 234         dvdcss_close( p_dvd->dvdhandle );
 235         free( p_dvd );
 236         p_input->b_error = 1;
 237         return;
 238     }
 239
 240     /* Set stream and area data */
 241     vlc_mutex_lock( &p_input->stream.stream_lock );
 242
 243     /* Initialize ES structures */
 244     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 245
 246 #define title_inf p_dvd->p_ifo->vmg.title_inf
 247     intf_WarnMsg( 2, "dvd info: number of titles: %d", title_inf.i_title_nb );
 248
 249 #define area p_input->stream.pp_areas
 250     /* We start from 1 here since the default area 0
 251      * is reserved for video_ts.vob */
 252     for( i = 1 ; i <= title_inf.i_title_nb ; i++ )
 253     {
 254         input_AddArea( p_input );
 255
 256         /* Titles are Program Chains */
 257         area[i]->i_id = i;
 258
 259         /* Absolute start offset and size
 260          * We can only set that with vts ifo, so we do it during the
 261          * first call to DVDSetArea */
 262         area[i]->i_start = 0;
 263         area[i]->i_size = 0;
 264
 265         /* Number of chapters */
 266         area[i]->i_part_nb = title_inf.p_attr[i-1].i_chapter_nb;
 267         area[i]->i_part = 1;
 268
 269         /* Number of angles */
 270         area[i]->i_angle_nb = 0;
 271         area[i]->i_angle = 1;
 272
 273         /* Offset to vts_i_0.ifo */
 274         area[i]->i_plugin_data = p_dvd->p_ifo->i_start +
 275                        title_inf.p_attr[i-1].i_start_sector;
 276     }
 277 #undef area
 278
 279     /* Get requested title - if none try the first title */
 280     i_title = main_GetIntVariable( INPUT_TITLE_VAR, 1 );
 281     if( i_title <= 0 || i_title > title_inf.i_title_nb )
 282     {
 283         i_title = 1;
 284     }
 285
 286 #undef title_inf
 287
 288     /* Get requested chapter - if none defaults to first one */
 289     i_chapter = main_GetIntVariable( INPUT_CHAPTER_VAR, 1 );
 290     if( i_chapter <= 0 )
 291     {
 292         i_chapter = 1;
 293     }
 294
 295     p_input->stream.pp_areas[i_title]->i_part = i_chapter;
 296
 297     p_area = p_input->stream.pp_areas[i_title];
 298
 299     /* set title, chapter, audio and subpic */
 300     DVDSetArea( p_input, p_area );
 301
 302     vlc_mutex_unlock( &p_input->stream.stream_lock );
 303
 304     return;
 305 }
 306
 307 /*****************************************************************************
 308  * DVDOpen: open dvd
 309  *****************************************************************************/
 310 static void DVDOpen( struct input_thread_s *p_input )
 311 {
 312     dvdcss_handle dvdhandle;
 313     int           i_flags;
 314
 315     vlc_mutex_lock( &p_input->stream.stream_lock );
 316
 317     /* If we are here we can control the pace... */
 318     p_input->stream.b_pace_control = 1;
 319
 320     p_input->stream.b_seekable = 1;
 321     p_input->stream.p_selected_area->i_size = 0;
 322
 323     p_input->stream.p_selected_area->i_tell = 0;
 324
 325     vlc_mutex_unlock( &p_input->stream.stream_lock );
 326
 327     /* Error messages from libdvdcss only in verbose mode */
 328     i_flags = p_main->i_warning_level ? DVDCSS_NOFLAGS : DVDCSS_INIT_QUIET;
 329
 330     /* Debug message from libdvdcss selected from config.h #define */
 331 #ifdef TRACE_DVDCSS
 332     i_flags |= DVDCSS_INIT_DEBUG;
 333 #endif
 334
 335     /* XXX: put this shit in an access plugin */
 336     if( strlen( p_input->p_source ) > 4
 337          && !strncasecmp( p_input->p_source, "dvd:", 4 ) )
 338     {
 339         dvdhandle = dvdcss_open( p_input->p_source + 4, i_flags );
 340     }
 341     else
 342     {
 343         dvdhandle = dvdcss_open( p_input->p_source, i_flags );
 344     }
 345
 346     if( dvdhandle == NULL )
 347     {
 348         intf_ErrMsg( "dvd error: dvdcss can't open device" );
 349         p_input->b_error = 1;
 350         return;
 351     }
 352
 353     p_input->i_handle = (int) dvdhandle;
 354 }
 355
 356 /*****************************************************************************
 357  * DVDClose: close dvd
 358  *****************************************************************************/
 359 static void DVDClose( struct input_thread_s *p_input )
 360 {
 361     /* Clean up libdvdcss */
 362     dvdcss_close( (dvdcss_handle) p_input->i_handle );
 363 }
 364
 365 /*****************************************************************************
 366  * DVDEnd: frees unused data
 367  *****************************************************************************/
 368 static void DVDEnd( input_thread_t * p_input )
 369 {
 370     thread_dvd_data_t *     p_dvd;
 371
 372     p_dvd = (thread_dvd_data_t*)p_input->p_plugin_data;
 373
 374     IfoDestroy( p_dvd->p_ifo );
 375
 376     free( p_dvd );
 377
 378     input_NetlistEnd( p_input );
 379 }
 380
 381 /*****************************************************************************
 382  * DVDSetArea: initialize input data for title x, chapter y.
 383  * It should be called for each user navigation request.
 384  *****************************************************************************
 385  * Take care that i_title starts from 0 (vmg) and i_chapter start from 1.
 386  * Note that you have to take the lock before entering here.
 387  *****************************************************************************/
 388 static int DVDSetArea( input_thread_t * p_input, input_area_t * p_area )
 389 {
 390     thread_dvd_data_t *  p_dvd;
 391     es_descriptor_t *    p_es;
 392     u16                  i_id;
 393     int                  i_vts_title;
 394     int                  i_audio_nb = 0;
 395     int                  i_spu_nb = 0;
 396     int                  i_audio;
 397     int                  i_spu;
 398     int                  i;
 399
 400     p_dvd = (thread_dvd_data_t*)p_input->p_plugin_data;
 401
 402     /* we can't use the interface slider until initilization is complete */
 403     p_input->stream.b_seekable = 0;
 404
 405     if( p_area != p_input->stream.p_selected_area )
 406     {
 407         /* Reset the Chapter position of the old title */
 408         p_input->stream.p_selected_area->i_part = 0;
 409
 410         /*
 411          *  We have to load all title information
 412          */
 413         /* Change the default area */
 414         p_input->stream.p_selected_area =
 415                     p_input->stream.pp_areas[p_area->i_id];
 416
 417         /* title number: it is not vts nb!,
 418          * it is what appears in the interface list */
 419         p_dvd->i_title = p_area->i_id;
 420         p_dvd->p_ifo->i_title = p_dvd->i_title;
 421
 422         /* set number of chapters of current title */
 423         p_dvd->i_chapter_nb = p_area->i_part_nb;
 424
 425         /* ifo vts */
 426         if( IfoTitleSet( p_dvd->p_ifo ) < 0 )
 427         {
 428             intf_ErrMsg( "dvd error: fatal error in vts ifo" );
 429             free( p_dvd );
 430             p_input->b_error = 1;
 431             return -1;
 432         }
 433
 434 #define vmg p_dvd->p_ifo->vmg
 435 #define vts p_dvd->p_ifo->vts
 436         /* title position inside the selected vts */
 437         i_vts_title = vmg.title_inf.p_attr[p_dvd->i_title-1].i_title_num;
 438         p_dvd->i_title_id =
 439             vts.title_inf.p_title_start[i_vts_title-1].i_title_id;
 440
 441         intf_WarnMsgImm( 3, "dvd: title %d vts_title %d pgc %d",
 442                          p_dvd->i_title, i_vts_title, p_dvd->i_title_id );
 443
 444
 445         /*
 446          * Angle management
 447          */
 448         p_dvd->i_angle_nb = vmg.title_inf.p_attr[p_dvd->i_title-1].i_angle_nb;
 449         p_dvd->i_angle = main_GetIntVariable( INPUT_ANGLE_VAR, 1 );
 450         if( ( p_dvd->i_angle <= 0 ) || p_dvd->i_angle > p_dvd->i_angle_nb )
 451         {
 452             p_dvd->i_angle = 1;
 453         }
 454
 455         /*
 456          * Set selected title start and size
 457          */
 458
 459         /* title set offset XXX: convert to block values */
 460         p_dvd->i_title_start =
 461             vts.i_pos + vts.manager_inf.i_title_vob_start_sector;
 462
 463         /* last video cell */
 464         p_dvd->i_cell = 0;
 465         p_dvd->i_prg_cell = -1 +
 466             vts.title_unit.p_title[p_dvd->i_title_id-1].title.i_cell_nb;
 467
 468         if( DVDFindCell( p_dvd ) < 0 )
 469         {
 470             intf_ErrMsg( "dvd error: can't find title end" );
 471             p_input->b_error = 1;
 472             return -1;
 473         }
 474
 475         /* temporary hack to fix size in some dvds */
 476         if( p_dvd->i_cell >= vts.cell_inf.i_cell_nb )
 477         {
 478             p_dvd->i_cell = vts.cell_inf.i_cell_nb - 1;
 479         }
 480
 481         p_dvd->i_sector = 0;
 482         p_dvd->i_size = vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector;
 483
 484         if( DVDChapterSelect( p_dvd, 1 ) < 0 )
 485         {
 486             intf_ErrMsg( "dvd error: can't find first chapter" );
 487             p_input->b_error = 1;
 488             return -1;
 489         }
 490
 491         /*
 492          * Force libdvdcss to check its title key.
 493          * It is only useful for title cracking method. Methods using the decrypted
 494          * disc key are fast enough to check the key at each seek
 495          */
 496         if( dvdcss_seek( p_dvd->dvdhandle, p_dvd->i_start, DVDCSS_SEEK_INI ) < 0 )
 497         {
 498             intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
 499             return -1;
 500         }
 501
 502         p_dvd->i_size -= p_dvd->i_sector + 1;
 503
 504         IfoPrintTitle( p_dvd );
 505
 506         /* Area definition */
 507         p_input->stream.p_selected_area->i_start = LB2OFF( p_dvd->i_start );
 508         p_input->stream.p_selected_area->i_size = LB2OFF( p_dvd->i_size );
 509         p_input->stream.p_selected_area->i_angle_nb = p_dvd->i_angle_nb;
 510         p_input->stream.p_selected_area->i_angle = p_dvd->i_angle;
 511
 512 #if 0
 513         /* start at the beginning of the title */
 514         /* FIXME: create a conf option to select whether to restart
 515          * title or not */
 516         p_input->stream.p_selected_area->i_tell = 0;
 517         p_input->stream.p_selected_area->i_part = 1;
 518 #endif
 519
 520         /*
 521          * Destroy obsolete ES by reinitializing program 0
 522          * and find all ES in title with ifo data
 523          */
 524         if( p_input->stream.pp_programs != NULL )
 525         {
 526             /* We don't use input_EndStream here since
 527              * we keep area structures */
 528
 529             for( i = 0 ; i < p_input->stream.i_selected_es_number ; i++ )
 530             {
 531                 input_UnselectES( p_input, p_input->stream.pp_selected_es[i] );
 532             }
 533
 534             free( p_input->stream.pp_selected_es );
 535             input_DelProgram( p_input, p_input->stream.pp_programs[0] );
 536
 537             p_input->stream.pp_selected_es = NULL;
 538             p_input->stream.i_selected_es_number = 0;
 539         }
 540
 541         input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
 542
 543         /* No PSM to read in DVD mode, we already have all information */
 544         p_input->stream.pp_programs[0]->b_is_ok = 1;
 545
 546         p_es = NULL;
 547
 548         /* ES 0 -> video MPEG2 */
 549         IfoPrintVideo( p_dvd );
 550
 551         p_es = input_AddES( p_input, p_input->stream.pp_programs[0], 0xe0, 0 );
 552         p_es->i_stream_id = 0xe0;
 553         p_es->i_type = MPEG2_VIDEO_ES;
 554         p_es->i_cat = VIDEO_ES;
 555         if( p_main->b_video )
 556         {
 557             input_SelectES( p_input, p_es );
 558         }
 559
 560 #define audio_status \
 561     vts.title_unit.p_title[p_dvd->i_title_id-1].title.pi_audio_status[i-1]
 562         /* Audio ES, in the order they appear in .ifo */
 563         for( i = 1 ; i <= vts.manager_inf.i_audio_nb ; i++ )
 564         {
 565             IfoPrintAudio( p_dvd, i );
 566
 567             /* audio channel is active if first byte is 0x80 */
 568             if( audio_status.i_available )
 569             {
 570                 i_audio_nb++;
 571
 572                 switch( vts.manager_inf.p_audio_attr[i-1].i_coding_mode )
 573                 {
 574                 case 0x00:              /* AC3 */
 575                     i_id = ( ( 0x80 + audio_status.i_position ) << 8 ) | 0xbd;
 576                     p_es = input_AddES( p_input,
 577                                p_input->stream.pp_programs[0], i_id, 0 );
 578                     p_es->i_stream_id = 0xbd;
 579                     p_es->i_type = AC3_AUDIO_ES;
 580                     p_es->b_audio = 1;
 581                     p_es->i_cat = AUDIO_ES;
 582                     strcpy( p_es->psz_desc, DecodeLanguage( hton16(
 583                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 584                     strcat( p_es->psz_desc, " (ac3)" );
 585
 586                     break;
 587                 case 0x02:
 588                 case 0x03:              /* MPEG audio */
 589                     i_id = 0xc0 + audio_status.i_position;
 590                     p_es = input_AddES( p_input,
 591                                     p_input->stream.pp_programs[0], i_id, 0 );
 592                     p_es->i_stream_id = i_id;
 593                     p_es->i_type = MPEG2_AUDIO_ES;
 594                     p_es->b_audio = 1;
 595                     p_es->i_cat = AUDIO_ES;
 596                     strcpy( p_es->psz_desc, DecodeLanguage( hton16(
 597                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 598                     strcat( p_es->psz_desc, " (mpeg)" );
 599
 600                     break;
 601                 case 0x04:              /* LPCM */
 602
 603                     i_id = ( ( 0xa0 + audio_status.i_position ) << 8 ) | 0xbd;
 604                     p_es = input_AddES( p_input,
 605                                     p_input->stream.pp_programs[0], i_id, 0 );
 606                     p_es->i_stream_id = i_id;
 607                     p_es->i_type = LPCM_AUDIO_ES;
 608                     p_es->b_audio = 1;
 609                     p_es->i_cat = AUDIO_ES;
 610                     strcpy( p_es->psz_desc, DecodeLanguage( hton16(
 611                         vts.manager_inf.p_audio_attr[i-1].i_lang_code ) ) );
 612                     strcat( p_es->psz_desc, " (lpcm)" );
 613
 614                     break;
 615                 case 0x06:              /* DTS */
 616                     i_id = ( ( 0x88 + audio_status.i_position ) << 8 ) | 0xbd;
 617                     intf_ErrMsg( "dvd warning: DTS audio not handled yet"
 618                                  "(0x%x)", i_id );
 619                     break;
 620                 default:
 621                     i_id = 0;
 622                     intf_ErrMsg( "dvd warning: unknown audio type %.2x",
 623                              vts.manager_inf.p_audio_attr[i-1].i_coding_mode );
 624                 }
 625             }
 626         }
 627 #undef audio_status
 628 #define spu_status \
 629     vts.title_unit.p_title[p_dvd->i_title_id-1].title.pi_spu_status[i-1]
 630
 631         /* Sub Picture ES */
 632
 633         for( i = 1 ; i <= vts.manager_inf.i_spu_nb; i++ )
 634         {
 635             IfoPrintSpu( p_dvd, i );
 636
 637             if( spu_status.i_available )
 638             {
 639                 i_spu_nb++;
 640
 641                 /*  there are several streams for one spu */
 642                 if(  vts.manager_inf.video_attr.i_ratio )
 643                 {
 644                     /* 16:9 */
 645                     switch( vts.manager_inf.video_attr.i_perm_displ )
 646                     {
 647                     case 1:
 648                         i_id = ( ( 0x20 + spu_status.i_position_pan ) << 8 )
 649                                | 0xbd;
 650                         break;
 651                     case 2:
 652                         i_id = ( ( 0x20 + spu_status.i_position_letter ) << 8 )
 653                                | 0xbd;
 654                         break;
 655                     default:
 656                         i_id = ( ( 0x20 + spu_status.i_position_wide ) << 8 )
 657                                | 0xbd;
 658                         break;
 659                     }
 660                 }
 661                 else
 662                 {
 663                     /* 4:3 */
 664                     i_id = ( ( 0x20 + spu_status.i_position_43 ) << 8 )
 665                            | 0xbd;
 666                 }
 667                 p_es = input_AddES( p_input,
 668                                     p_input->stream.pp_programs[0], i_id, 0 );
 669                 p_es->i_stream_id = 0xbd;
 670                 p_es->i_type = DVD_SPU_ES;
 671                 p_es->i_cat = SPU_ES;
 672                 strcpy( p_es->psz_desc, DecodeLanguage( hton16(
 673                     vts.manager_inf.p_spu_attr[i-1].i_lang_code ) ) );
 674             }
 675         }
 676 #undef spu_status
 677         if( p_main->b_audio )
 678         {
 679             /* For audio: first one if none or a not existing one specified */
 680             i_audio = main_GetIntVariable( INPUT_CHANNEL_VAR, 1 );
 681             if( i_audio < 0 || i_audio > i_audio_nb )
 682             {
 683                 main_PutIntVariable( INPUT_CHANNEL_VAR, 1 );
 684                 i_audio = 1;
 685             }
 686             if( i_audio > 0 && i_audio_nb > 0 )
 687             {
 688                 if( main_GetIntVariable( AOUT_SPDIF_VAR, 0 ) ||
 689                     ( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) ==
 690                       REQUESTED_AC3 ) )
 691                 {
 692                     int     i_ac3 = i_audio;
 693                     while( ( p_input->stream.pp_es[i_ac3]->i_type !=
 694                              AC3_AUDIO_ES ) && ( i_ac3 <=
 695                              vts.manager_inf.i_audio_nb ) )
 696                     {
 697                         i_ac3++;
 698                     }
 699                     if( p_input->stream.pp_es[i_ac3]->i_type == AC3_AUDIO_ES )
 700                     {
 701                         input_SelectES( p_input,
 702                                         p_input->stream.pp_es[i_ac3] );
 703                     }
 704                 }
 705                 else
 706                 {
 707                     input_SelectES( p_input,
 708                                     p_input->stream.pp_es[i_audio] );
 709                 }
 710             }
 711         }
 712
 713         if( p_main->b_video )
 714         {
 715             /* for spu, default is none */
 716             i_spu = main_GetIntVariable( INPUT_SUBTITLE_VAR, 0 );
 717             if( i_spu < 0 || i_spu > i_spu_nb )
 718             {
 719                 main_PutIntVariable( INPUT_SUBTITLE_VAR, 0 );
 720                 i_spu = 0;
 721             }
 722             if( i_spu > 0 && i_spu_nb > 0 )
 723             {
 724                 i_spu += vts.manager_inf.i_audio_nb;
 725                 input_SelectES( p_input, p_input->stream.pp_es[i_spu] );
 726             }
 727         }
 728     } /* i_title >= 0 */
 729     else
 730     {
 731         p_area = p_input->stream.p_selected_area;
 732     }
 733 #undef vts
 734 #undef vmg
 735
 736     /*
 737      * Chapter selection
 738      */
 739
 740     if( p_area->i_part != p_dvd->i_chapter )
 741     {
 742         if( ( p_area->i_part > 0 ) &&
 743             ( p_area->i_part <= p_area->i_part_nb ))
 744         {
 745             if( DVDChapterSelect( p_dvd, p_area->i_part ) < 0 )
 746             {
 747                 intf_ErrMsg( "dvd error: can't set chapter in area" );
 748                 p_input->b_error = 1;
 749                 return -1;
 750             }
 751
 752             p_input->stream.p_selected_area->i_tell =
 753                                    LB2OFF( p_dvd->i_start ) - p_area->i_start;
 754             p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 755
 756             intf_WarnMsg( 4, "dvd info: chapter %d start at: %lld",
 757                                         p_area->i_part, p_area->i_tell );
 758         }
 759         else
 760         {
 761             p_area->i_part = 1;
 762             p_dvd->i_chapter = 1;
 763         }
 764     }
 765
 766 #define title \
 767     p_dvd->p_ifo->vts.title_unit.p_title[p_dvd->i_title_id-1].title
 768     if( p_area->i_angle != p_dvd->i_angle )
 769     {
 770         if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
 771         {
 772             if( ( p_area->i_angle - p_dvd->i_angle ) < 0 )
 773             {
 774                 p_dvd->i_cell = 0;
 775             }
 776             p_dvd->i_prg_cell += ( p_area->i_angle - p_dvd->i_angle );
 777             p_dvd->i_angle = p_area->i_angle;
 778
 779             DVDFindSector( p_dvd );
 780             p_dvd->i_cell += p_dvd->i_angle_cell;
 781         }
 782         else
 783         {
 784             p_dvd->i_angle = p_area->i_angle;
 785         }
 786
 787         intf_WarnMsg( 3, "dvd info: angle %d selected", p_area->i_angle );
 788     }
 789
 790     /* warn interface that something has changed */
 791     p_input->stream.b_seekable = 1;
 792     p_input->stream.b_changed = 1;
 793
 794     return 0;
 795 }
 796
 797
 798 /*****************************************************************************
 799  * DVDRead: reads data packets into the netlist.
 800  *****************************************************************************
 801  * Returns -1 in case of error, 0 if everything went well, and 1 in case of
 802  * EOF.
 803  *****************************************************************************/
 804 static int DVDRead( input_thread_t * p_input,
 805                     data_packet_t ** pp_packets )
 806 {
 807     thread_dvd_data_t *     p_dvd;
 808     netlist_t *             p_netlist;
 809     struct iovec *          p_vec;
 810     struct data_packet_s *  pp_data[DVD_DATA_READ_ONCE];
 811     u8 *                    pi_cur;
 812     int                     i_block_once;
 813     int                     i_packet_size;
 814     int                     i_iovec;
 815     int                     i_packet;
 816     int                     i_pos;
 817     int                     i_read_blocks;
 818     int                     i_sector;
 819     boolean_t               b_eof;
 820     boolean_t               b_eot;
 821     boolean_t               b_eoc;
 822
 823     p_dvd = (thread_dvd_data_t *)p_input->p_plugin_data;
 824     p_netlist = (netlist_t *)p_input->p_method_data;
 825
 826     b_eoc = 0;
 827     i_sector = p_dvd->i_title_start + p_dvd->i_sector;
 828     i_block_once = p_dvd->i_end_sector - p_dvd->i_sector + 1;
 829
 830
 831     /* Get the position of the next cell if we're at cell end */
 832     if( i_block_once <= 0 )
 833     {
 834         int     i_angle;
 835
 836         p_dvd->i_cell++;
 837         p_dvd->i_angle_cell++;
 838
 839         /* Find cell index in adress map */
 840         if( DVDFindSector( p_dvd ) < 0 )
 841         {
 842             pp_packets[0] = NULL;
 843             intf_ErrMsg( "dvd error: can't find next cell" );
 844             return 1;
 845         }
 846
 847         /* Position the fd pointer on the right address */
 848         if( ( i_sector = dvdcss_seek( p_dvd->dvdhandle,
 849                                       p_dvd->i_title_start + p_dvd->i_sector,
 850                                       DVDCSS_SEEK_MPEG ) ) < 0 )
 851         {
 852             intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
 853             return -1;
 854         }
 855
 856         /* update chapter : it will be easier when we have navigation
 857          * ES support */
 858         if( p_dvd->i_chapter < ( p_dvd->i_chapter_nb - 1 ) )
 859         {
 860             if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
 861             {
 862                 i_angle = p_dvd->i_angle - 1;
 863             }
 864             else
 865             {
 866                 i_angle = 0;
 867             }
 868             if( title.chapter_map.pi_start_cell[p_dvd->i_chapter] <=
 869                 ( p_dvd->i_prg_cell - i_angle + 1 ) )
 870             {
 871                 p_dvd->i_chapter++;
 872                 b_eoc = 1;
 873             }
 874         }
 875
 876         i_block_once = p_dvd->i_end_sector - p_dvd->i_sector + 1;
 877     }
 878
 879     /* The number of blocks read is the max between the requested
 880      * value and the leaving block in the cell */
 881     if( i_block_once > p_dvd->i_block_once )
 882     {
 883         i_block_once = p_dvd->i_block_once;
 884     }
 885 /*
 886 intf_WarnMsg( 2, "Sector: 0x%x Read: %d Chapter: %d", p_dvd->i_sector, i_block_once, p_dvd->i_chapter );
 887 */
 888     p_netlist->i_read_once = i_block_once;
 889
 890     /* Get an iovec pointer */
 891     if( ( p_vec = input_NetlistGetiovec( p_netlist ) ) == NULL )
 892     {
 893         intf_ErrMsg( "dvd error: can't get iovec" );
 894         return -1;
 895     }
 896
 897     /* Reads from DVD */
 898     i_read_blocks = dvdcss_readv( p_dvd->dvdhandle, p_vec,
 899                                   i_block_once, DVDCSS_READ_DECRYPT );
 900
 901     /* Update netlist indexes: we don't do it in DVDGetiovec since we
 902      * need know the real number of blocks read */
 903     input_NetlistMviovec( p_netlist, i_read_blocks, pp_data );
 904
 905     /* Update global position */
 906     p_dvd->i_sector += i_read_blocks;
 907
 908     i_packet = 0;
 909
 910     /* Read headers to compute payload length */
 911     for( i_iovec = 0 ; i_iovec < i_read_blocks ; i_iovec++ )
 912     {
 913         i_pos = 0;
 914
 915         while( i_pos < p_netlist->i_buffer_size )
 916         {
 917             pi_cur = (u8*)p_vec[i_iovec].iov_base + i_pos;
 918
 919             /*default header */
 920             if( U32_AT( pi_cur ) != 0x1BA )
 921             {
 922                 /* That's the case for all packets, except pack header. */
 923                 i_packet_size = U16_AT( pi_cur + 4 );
 924                 pp_packets[i_packet] = input_NetlistNewPtr( p_netlist );
 925                 (*pp_data[i_iovec]->pi_refcount)++;
 926                 pp_packets[i_packet]->pi_refcount =
 927                     pp_data[i_iovec]->pi_refcount;
 928                 pp_packets[i_packet]->p_buffer = pp_data[i_iovec]->p_buffer;
 929             }
 930             else
 931             {
 932                 /* MPEG-2 Pack header. */
 933                 i_packet_size = 8;
 934                 pp_packets[i_packet] = pp_data[i_iovec];
 935             }
 936
 937             pp_packets[i_packet]->p_payload_start =
 938                     pp_packets[i_packet]->p_buffer + i_pos;
 939
 940             pp_packets[i_packet]->p_payload_end =
 941                     pp_packets[i_packet]->p_payload_start + i_packet_size + 6;
 942
 943             i_packet++;
 944             i_pos += i_packet_size + 6;
 945         }
 946     }
 947
 948     pp_packets[i_packet] = NULL;
 949
 950     vlc_mutex_lock( &p_input->stream.stream_lock );
 951
 952     p_input->stream.p_selected_area->i_tell =
 953         LB2OFF( i_sector + i_read_blocks ) -
 954         p_input->stream.p_selected_area->i_start;
 955     if( b_eoc )
 956     {
 957         /* We modify i_part only at end of chapter not to erase
 958          * some modification from the interface */
 959         p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
 960     }
 961
 962     b_eot = !( p_input->stream.p_selected_area->i_tell
 963                   < p_input->stream.p_selected_area->i_size );
 964     b_eof = b_eot && ( ( p_dvd->i_title + 1 ) >= p_input->stream.i_area_nb );
 965
 966     if( b_eof )
 967     {
 968         vlc_mutex_unlock( &p_input->stream.stream_lock );
 969         return 1;
 970     }
 971
 972     if( b_eot )
 973     {
 974         intf_WarnMsg( 4, "dvd info: new title" );
 975         p_dvd->i_title++;
 976         DVDSetArea( p_input, p_input->stream.pp_areas[p_dvd->i_title] );
 977         vlc_mutex_unlock( &p_input->stream.stream_lock );
 978         return 0;
 979     }
 980
 981     vlc_mutex_unlock( &p_input->stream.stream_lock );
 982
 983     if( i_read_blocks == i_block_once )
 984     {
 985         return 0;
 986     }
 987
 988     return -1;
 989 }
 990
 991 /*****************************************************************************
 992  * DVDRewind : reads a stream backward
 993  *****************************************************************************/
 994 static int DVDRewind( input_thread_t * p_input )
 995 {
 996     return( -1 );
 997 }
 998
 999 /*****************************************************************************
1000  * DVDSeek : Goes to a given position on the stream.
1001  *****************************************************************************
1002  * This one is used by the input and translate chronological position from
1003  * input to logical position on the device.
1004  * The lock should be taken before calling this function.
1005  *****************************************************************************/
1006 static void DVDSeek( input_thread_t * p_input, off_t i_off )
1007 {
1008     thread_dvd_data_t *     p_dvd;
1009     int                     i_block;
1010     int                     i_prg_cell;
1011     int                     i_cell;
1012     int                     i_chapter;
1013     int                     i_angle;
1014
1015     p_dvd = ( thread_dvd_data_t * )p_input->p_plugin_data;
1016
1017     /* we have to take care of offset of beginning of title */
1018     p_dvd->i_sector = OFF2LB(i_off + p_input->stream.p_selected_area->i_start)
1019                        - p_dvd->i_title_start;
1020
1021     i_prg_cell = 0;
1022     i_chapter = 0;
1023
1024     /* parse vobu address map to find program cell */
1025     while( title.p_cell_play[i_prg_cell].i_end_sector < p_dvd->i_sector  )
1026     {
1027         i_prg_cell++;
1028     }
1029
1030     p_dvd->i_prg_cell = i_prg_cell;
1031
1032     if( DVDChooseAngle( p_dvd ) < 0 )
1033     {
1034         p_input->b_error = 1;
1035         return;
1036     }
1037
1038     p_dvd->i_cell = 0;
1039
1040     /* Find first title cell which is inside program cell */
1041     if( DVDFindCell( p_dvd ) < 0 )
1042     {
1043         /* no following cell : we're at eof */
1044         intf_ErrMsg( "dvd error: cell seeking failed" );
1045         p_input->b_error = 1;
1046         return;
1047     }
1048
1049     i_cell = p_dvd->i_cell;
1050
1051 #define cell p_dvd->p_ifo->vts.cell_inf.p_cell_map[i_cell]
1052     /* parse cell address map to find title cell containing sector */
1053     while( cell.i_end_sector < p_dvd->i_sector )
1054     {
1055         i_cell++;
1056     }
1057
1058     p_dvd->i_cell = i_cell;
1059
1060     /* if we're inside a multi-angle zone, we have to choose i_sector
1061      * in the current angle ; we can't do it all the time since cells
1062      * can be very wide out of such zones */
1063     if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1064     {
1065         p_dvd->i_sector = MAX(
1066                 cell.i_start_sector,
1067                 title.p_cell_play[p_dvd->i_prg_cell].i_start_sector );
1068     }
1069
1070     p_dvd->i_end_sector = MIN(
1071             cell.i_end_sector,
1072             title.p_cell_play[p_dvd->i_prg_cell].i_end_sector );
1073 #undef cell
1074     /* update chapter */
1075     if( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1076     {
1077         i_angle = p_dvd->i_angle - 1;
1078     }
1079     else
1080     {
1081         i_angle = 0;
1082     }
1083     if( p_dvd->i_chapter_nb > 1 )
1084     {
1085         while( ( title.chapter_map.pi_start_cell[i_chapter] <=
1086                     ( p_dvd->i_prg_cell - i_angle + 1 ) ) &&
1087                ( i_chapter < ( p_dvd->i_chapter_nb - 1 ) ) )
1088         {
1089             i_chapter++;
1090         }
1091     }
1092     else
1093     {
1094         i_chapter = 1;
1095     }
1096
1097     p_dvd->i_chapter = i_chapter;
1098     p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
1099
1100     if( ( i_block = dvdcss_seek( p_dvd->dvdhandle,
1101                                  p_dvd->i_title_start + p_dvd->i_sector,
1102                                  DVDCSS_SEEK_MPEG ) ) < 0 )
1103     {
1104         intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
1105         p_input->b_error = 1;
1106         return;
1107     }
1108
1109     p_input->stream.p_selected_area->i_tell =
1110         LB2OFF ( i_block ) - p_input->stream.p_selected_area->i_start;
1111
1112     intf_WarnMsg( 7, "Program Cell: %d Cell: %d Chapter: %d",
1113                      p_dvd->i_prg_cell, p_dvd->i_cell, p_dvd->i_chapter );
1114
1115
1116     return;
1117 }
1118
1119 #define cell  p_dvd->p_ifo->vts.cell_inf
1120
1121 /*****************************************************************************
1122  * DVDFindCell: adjust the title cell index with the program cell
1123  *****************************************************************************/
1124 static int DVDFindCell( thread_dvd_data_t * p_dvd )
1125 {
1126     int                 i_cell;
1127     int                 i_index;
1128
1129     i_cell = p_dvd->i_cell;
1130     i_index = p_dvd->i_prg_cell;
1131
1132     if( i_cell >= cell.i_cell_nb )
1133     {
1134         return -1;
1135     }
1136
1137     while( ( ( title.p_cell_pos[i_index].i_vob_id !=
1138                    cell.p_cell_map[i_cell].i_vob_id ) ||
1139       ( title.p_cell_pos[i_index].i_cell_id !=
1140                    cell.p_cell_map[i_cell].i_cell_id ) ) &&
1141            ( i_cell < cell.i_cell_nb - 1 ) )
1142     {
1143         i_cell++;
1144     }
1145
1146 /*
1147 intf_WarnMsg( 12, "FindCell: i_cell %d i_index %d found %d nb %d",
1148                     p_dvd->i_cell,
1149                     p_dvd->i_prg_cell,
1150                     i_cell,
1151                     cell.i_cell_nb );
1152 */
1153
1154     p_dvd->i_cell = i_cell;
1155
1156     return 0;
1157 }
1158
1159 #undef cell
1160
1161 /*****************************************************************************
1162  * DVDFindSector: find cell index in adress map from index in
1163  * information table program map and give corresponding sectors.
1164  *****************************************************************************/
1165 static int DVDFindSector( thread_dvd_data_t * p_dvd )
1166 {
1167
1168     if( p_dvd->i_sector > title.p_cell_play[p_dvd->i_prg_cell].i_end_sector )
1169     {
1170         p_dvd->i_prg_cell++;
1171
1172         if( DVDChooseAngle( p_dvd ) < 0 )
1173         {
1174             return -1;
1175         }
1176     }
1177
1178     if( DVDFindCell( p_dvd ) < 0 )
1179     {
1180         intf_ErrMsg( "dvd error: can't find sector" );
1181         return -1;
1182     }
1183
1184     /* Find start and end sectors of new cell */
1185 #if 1
1186     p_dvd->i_sector = MAX(
1187          p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_start_sector,
1188          title.p_cell_play[p_dvd->i_prg_cell].i_start_sector );
1189     p_dvd->i_end_sector = MIN(
1190          p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector,
1191          title.p_cell_play[p_dvd->i_prg_cell].i_end_sector );
1192 #else
1193     p_dvd->i_sector = title.p_cell_play[p_dvd->i_prg_cell].i_start_sector;
1194     p_dvd->i_end_sector = title.p_cell_play[p_dvd->i_prg_cell].i_end_sector;
1195 #endif
1196
1197 /*
1198     intf_WarnMsg( 12, "cell: %d sector1: 0x%x end1: 0x%x\n"
1199                    "index: %d sector2: 0x%x end2: 0x%x\n"
1200                    "category: 0x%x ilvu end: 0x%x vobu start 0x%x",
1201         p_dvd->i_cell,
1202         p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_start_sector,
1203         p_dvd->p_ifo->vts.cell_inf.p_cell_map[p_dvd->i_cell].i_end_sector,
1204         p_dvd->i_prg_cell,
1205         title.p_cell_play[p_dvd->i_prg_cell].i_start_sector,
1206         title.p_cell_play[p_dvd->i_prg_cell].i_end_sector,
1207         title.p_cell_play[p_dvd->i_prg_cell].i_category,
1208         title.p_cell_play[p_dvd->i_prg_cell].i_first_ilvu_vobu_esector,
1209         title.p_cell_play[p_dvd->i_prg_cell].i_last_vobu_start_sector );
1210 */
1211
1212     return 0;
1213 }
1214
1215 /*****************************************************************************
1216  * DVDChapterSelect: find the cell corresponding to requested chapter
1217  *****************************************************************************/
1218 static int DVDChapterSelect( thread_dvd_data_t * p_dvd, int i_chapter )
1219 {
1220
1221     /* Find cell index in Program chain for current chapter */
1222     p_dvd->i_prg_cell = title.chapter_map.pi_start_cell[i_chapter-1] - 1;
1223     p_dvd->i_cell = 0;
1224     p_dvd->i_sector = 0;
1225
1226     DVDChooseAngle( p_dvd );
1227
1228     /* Search for cell_index in cell adress_table and initialize
1229      * start sector */
1230     if( DVDFindSector( p_dvd ) < 0 )
1231     {
1232         intf_ErrMsg( "dvd error: can't select chapter" );
1233         return -1;
1234     }
1235
1236     /* start is : beginning of vts vobs + offset to vob x */
1237     p_dvd->i_start = p_dvd->i_title_start + p_dvd->i_sector;
1238
1239     /* Position the fd pointer on the right address */
1240     if( ( p_dvd->i_start = dvdcss_seek( p_dvd->dvdhandle,
1241                                         p_dvd->i_start,
1242                                         DVDCSS_SEEK_MPEG ) ) < 0 )
1243     {
1244         intf_ErrMsg( "dvd error: %s", dvdcss_error( p_dvd->dvdhandle ) );
1245         return -1;
1246     }
1247
1248     p_dvd->i_chapter = i_chapter;
1249     return 0;
1250 }
1251
1252 /*****************************************************************************
1253  * DVDChooseAngle: select the cell corresponding to the selected angle
1254  *****************************************************************************/
1255 static int DVDChooseAngle( thread_dvd_data_t * p_dvd )
1256 {
1257     /* basic handling of angles */
1258     switch( ( ( title.p_cell_play[p_dvd->i_prg_cell].i_category & 0xf000 )
1259                     >> 12 ) )
1260     {
1261         /* we enter a muli-angle section */
1262         case 0x5:
1263             p_dvd->i_prg_cell += p_dvd->i_angle - 1;
1264             p_dvd->i_angle_cell = 0;
1265             break;
1266         /* we exit a multi-angle section */
1267         case 0x9:
1268         case 0xd:
1269             p_dvd->i_prg_cell += p_dvd->i_angle_nb - p_dvd->i_angle;
1270             break;
1271     }
1272
1273     return 0;
1274 }
1275
1276 #undef title