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

   1 /*****************************************************************************
   2  * input_dvd.c: DVD raw reading plugin.
   3  * ---
   4  * This plugins should handle all the known specificities of the DVD format,
   5  * especially the 2048 bytes logical block size.
   6  * It depends on:
   7  *  -input_netlist used to read packets
   8  *  -dvd_ifo for ifo parsing and analyse
   9  *  -dvd_css for unscrambling
  10  *  -dvd_udf to find files
  11  *****************************************************************************
  12  * Copyright (C) 1998-2001 VideoLAN
  13  * $Id: input_dvd.c,v 1.11 2001/02/14 15:58:29 henri Exp $
  14  *
  15  * Author: Stéphane Borel <stef@via.ecp.fr>
  16  *
  17  * This program is free software; you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation; either version 2 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  30  *****************************************************************************/
  31
  32 /*****************************************************************************
  33  * Preamble
  34  *****************************************************************************/
  35 #include "defs.h"
  36
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <unistd.h>
  40 #include <netinet/in.h>
  41
  42 #include <fcntl.h>
  43 #include <sys/types.h>
  44 #include <sys/uio.h>
  45
  46 #include <string.h>
  47 #include <errno.h>
  48 #include <malloc.h>
  49
  50 #include "config.h"
  51 #include "common.h"
  52 #include "threads.h"
  53 #include "mtime.h"
  54 #include "tests.h"
  55
  56 #include "intf_msg.h"
  57
  58 #include "main.h"
  59
  60 #include "stream_control.h"
  61 #include "input_ext-intf.h"
  62 #include "input_ext-dec.h"
  63
  64 #include "input.h"
  65 #include "input_netlist.h"
  66
  67 #include "dvd_ifo.h"
  68 #include "dvd_css.h"
  69 #include "input_dvd.h"
  70 #include "mpeg_system.h"
  71
  72 #include "debug.h"
  73
  74 #include "modules.h"
  75
  76 /*****************************************************************************
  77  * Local prototypes
  78  *****************************************************************************/
  79 static int  DVDProbe    ( probedata_t *p_data );
  80 static int  DVDCheckCSS ( struct input_thread_s * );
  81 static int  DVDRead     ( struct input_thread_s *, data_packet_t ** );
  82 static void DVDInit     ( struct input_thread_s * );
  83 static void DVDEnd      ( struct input_thread_s * );
  84 static void DVDSeek     ( struct input_thread_s *, off_t );
  85 static int  DVDRewind   ( struct input_thread_s * );
  86
  87 /*****************************************************************************
  88  * Functions exported as capabilities. They are declared as static so that
  89  * we don't pollute the namespace too much.
  90  *****************************************************************************/
  91 void input_getfunctions( function_list_t * p_function_list )
  92 {
  93 #define input p_function_list->functions.input
  94     p_function_list->pf_probe = DVDProbe;
  95     input.pf_init             = DVDInit;
  96     input.pf_open             = input_FileOpen;
  97     input.pf_close            = input_FileClose;
  98     input.pf_end              = DVDEnd;
  99     input.pf_read             = DVDRead;
 100     input.pf_demux            = input_DemuxPS;
 101     input.pf_new_packet       = input_NetlistNewPacket;
 102     input.pf_new_pes          = input_NetlistNewPES;
 103     input.pf_delete_packet    = input_NetlistDeletePacket;
 104     input.pf_delete_pes       = input_NetlistDeletePES;
 105     input.pf_rewind           = DVDRewind;
 106     input.pf_seek             = DVDSeek;
 107 #undef input
 108 }
 109
 110 /*
 111  * Data reading functions
 112  */
 113
 114 /*****************************************************************************
 115  * DVDProbe: verifies that the stream is a PS stream
 116  *****************************************************************************/
 117 static int DVDProbe( probedata_t *p_data )
 118 {
 119     if( TestMethod( INPUT_METHOD_VAR, "dvd" ) )
 120     {
 121         return( 999 );
 122     }
 123
 124     return 5;
 125 }
 126
 127 /*****************************************************************************
 128  * DVDCheckCSS: check the stream
 129  *****************************************************************************/
 130 static int DVDCheckCSS( input_thread_t * p_input )
 131 {
 132 #if defined( HAVE_SYS_DVDIO_H ) || defined( LINUX_DVD )
 133     return CSSTest( p_input->i_handle );
 134 #else
 135     /* DVD ioctls unavailable.
 136      * FIXME: Check the stream to see whether it is encrypted or not
 137      * to give and accurate error message */
 138     return 0;
 139 #endif
 140 }
 141
 142 /*****************************************************************************
 143  * DVDInit: initializes DVD structures
 144  *****************************************************************************/
 145 static void DVDInit( input_thread_t * p_input )
 146 {
 147     thread_dvd_data_t *  p_method;
 148     off_t                i_start;
 149     off_t                i_size;
 150     int                  i_cell, i_cell_1, i_start_cell, i_end_cell;
 151
 152     if( (p_method = malloc( sizeof(thread_dvd_data_t) )) == NULL )
 153     {
 154         intf_ErrMsg( "Out of memory" );
 155         p_input->b_error = 1;
 156         return;
 157     }
 158
 159     p_input->p_plugin_data = (void *)p_method;
 160     p_input->p_method_data = NULL;
 161
 162     p_method->i_fd = p_input->i_handle;
 163     /* FIXME: read several packets once */
 164     p_method->i_read_once = 1;
 165     p_method->i_title = 0;
 166     p_method->b_encrypted = DVDCheckCSS( p_input );
 167
 168     lseek( p_input->i_handle, 0, SEEK_SET );
 169
 170     /* Reading structures initialisation */
 171     input_NetlistInit( p_input, 4096, 4096, DVD_LB_SIZE,
 172                        p_method->i_read_once );
 173
 174     /* Ifo initialisation */
 175     p_method->ifo = IfoInit( p_input->i_handle );
 176
 177     /* CSS initialisation */
 178     if( p_method->b_encrypted )
 179     {
 180
 181 #if defined( HAVE_SYS_DVDIO_H ) || defined( LINUX_DVD )
 182         p_method->css = CSSInit( p_input->i_handle );
 183
 184         if( ( p_input->b_error = p_method->css.b_error ) )
 185         {
 186             intf_ErrMsg( "CSS fatal error" );
 187             return;
 188         }
 189 #else
 190         intf_ErrMsg( "Unscrambling not supported" );
 191         p_input->b_error = 1;
 192         return;
 193 #endif
 194     }
 195
 196     /* Ifo structures reading */
 197     IfoRead( &(p_method->ifo) );
 198     intf_WarnMsg( 3, "Ifo: Initialized" );
 199
 200     /* CSS title keys */
 201     if( p_method->b_encrypted )
 202     {
 203
 204 #if defined( HAVE_SYS_DVDIO_H ) || defined( LINUX_DVD )
 205         int   i;
 206
 207         p_method->css.i_title_nb = p_method->ifo.vmg.mat.i_tts_nb;
 208
 209         if( (p_method->css.p_title_key =
 210             malloc( p_method->css.i_title_nb *sizeof(title_key_t) ) ) == NULL )
 211         {
 212             intf_ErrMsg( "Out of memory" );
 213             p_input->b_error = 1;
 214             return;
 215         }
 216
 217         for( i=0 ; i<p_method->css.i_title_nb ; i++ )
 218         {
 219             p_method->css.p_title_key[i].i =
 220                 p_method->ifo.p_vts[i].i_pos +
 221                 p_method->ifo.p_vts[i].mat.i_tt_vobs_ssector * DVD_LB_SIZE;
 222         }
 223
 224         CSSGetKeys( &(p_method->css) );
 225
 226         intf_WarnMsg( 3, "CSS: initialized" );
 227 #else
 228         intf_ErrMsg( "Unscrambling not supported" );
 229         p_input->b_error = 1;
 230         return;
 231 #endif
 232     }
 233
 234     /* FIXME: Kludge beginning and end of the stream in vts_01_1.vob */
 235
 236     /* Determines which vob contains the movie */
 237     i_cell = 0;
 238     i_cell_1 = 0;
 239     i_start_cell = 0;
 240     i_end_cell = 0;
 241
 242     /* Loop on the number of vobs */
 243     while( p_method->ifo.p_vts[0].c_adt.p_cell_inf[i_cell].i_vob_id <=
 244            p_method->ifo.p_vts[0].c_adt.i_vob_nb )
 245     {
 246         i_cell_1 = i_cell;
 247
 248         /* Loop to find the number of cells in the vob */
 249         do
 250         {
 251             i_cell++;
 252             if( i_cell >= p_method->ifo.p_vts[0].c_adt.i_cell_nb )
 253             {
 254                 break;
 255             }
 256         }
 257         while( p_method->ifo.p_vts[0].c_adt.p_cell_inf[i_cell-1].i_cell_id <
 258                p_method->ifo.p_vts[0].c_adt.p_cell_inf[i_cell].i_cell_id );
 259
 260
 261         if( p_method->ifo.p_vts[0].c_adt.p_cell_inf[i_cell-1].i_cell_id >
 262             p_method->ifo.p_vts[0].c_adt.p_cell_inf[i_end_cell].i_cell_id )
 263         {
 264             i_start_cell = i_cell_1;
 265             i_end_cell = i_cell - 1;
 266         }
 267     }
 268
 269     /* The preceding does not work with all DVD, so we give the
 270      * last cell of the title as end */
 271     i_end_cell = p_method->ifo.p_vts[0].c_adt.i_cell_nb - 1;
 272
 273     intf_WarnMsg( 2, "DVD: Start cell: %d End Cell: %d",
 274                                             i_start_cell, i_end_cell );
 275
 276     p_method->i_start_cell = i_start_cell;
 277     p_method->i_end_cell = i_end_cell;
 278
 279     /* start is : beginning of vts + offset to vobs + offset to vob x */
 280     i_start = p_method->ifo.p_vts[0].i_pos + DVD_LB_SIZE *
 281             ( p_method->ifo.p_vts[0].mat.i_tt_vobs_ssector +
 282               p_method->ifo.p_vts[0].c_adt.p_cell_inf[i_start_cell].i_ssector );
 283     p_method->i_start_byte = i_start;
 284
 285     i_start = lseek( p_input->i_handle, i_start, SEEK_SET );
 286     intf_WarnMsg( 3, "DVD: VOBstart at: %lld", i_start );
 287
 288     i_size = (off_t)
 289         ( p_method->ifo.p_vts[0].c_adt.p_cell_inf[i_end_cell].i_esector -
 290           p_method->ifo.p_vts[0].c_adt.p_cell_inf[i_start_cell].i_ssector + 1 )
 291         *DVD_LB_SIZE;
 292     intf_WarnMsg( 3, "DVD: stream size: %lld", i_size );
 293
 294
 295     /* Initialize ES structures */
 296     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
 297     input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
 298
 299     if( p_input->stream.b_seekable )
 300     {
 301         stream_ps_data_t * p_demux_data =
 302              (stream_ps_data_t *)p_input->stream.pp_programs[0]->p_demux_data;
 303
 304         /* Pre-parse the stream to gather stream_descriptor_t. */
 305         p_input->stream.pp_programs[0]->b_is_ok = 0;
 306         p_demux_data->i_PSM_version = EMPTY_PSM_VERSION;
 307
 308         while( !p_input->b_die && !p_input->b_error
 309                 && !p_demux_data->b_has_PSM )
 310         {
 311             int                 i_result, i;
 312             data_packet_t *     pp_packets[INPUT_READ_ONCE];
 313
 314             i_result = DVDRead( p_input, pp_packets );
 315             if( i_result == 1 )
 316             {
 317                 /* EOF */
 318                 vlc_mutex_lock( &p_input->stream.stream_lock );
 319                 p_input->stream.pp_programs[0]->b_is_ok = 1;
 320                 vlc_mutex_unlock( &p_input->stream.stream_lock );
 321                 break;
 322             }
 323             if( i_result == -1 )
 324             {
 325                 p_input->b_error = 1;
 326                 break;
 327             }
 328
 329             for( i = 0; i < INPUT_READ_ONCE && pp_packets[i] != NULL; i++ )
 330             {
 331                 /* FIXME: use i_p_config_t */
 332                 input_ParsePS( p_input, pp_packets[i] );
 333                 input_NetlistDeletePacket( p_input->p_method_data,
 334                                            pp_packets[i] );
 335             }
 336
 337             /* File too big. */
 338             if( p_input->stream.i_tell > INPUT_PREPARSE_LENGTH )
 339             {
 340                 break;
 341             }
 342         }
 343         lseek( p_input->i_handle, i_start, SEEK_SET );
 344         vlc_mutex_lock( &p_input->stream.stream_lock );
 345
 346         /* i_tell is an indicator from the beginning of the stream,
 347          * not of the DVD */
 348         p_input->stream.i_tell = 0;
 349
 350         if( p_demux_data->b_has_PSM )
 351         {
 352             /* (The PSM decoder will care about spawning the decoders) */
 353             p_input->stream.pp_programs[0]->b_is_ok = 1;
 354         }
 355 #ifdef AUTO_SPAWN
 356         else
 357         {
 358             /* (We have to do it ourselves) */
 359             int                 i_es;
 360
 361             /* FIXME: we should do multiple passes in case an audio type
 362              * is not present */
 363             for( i_es = 0;
 364                  i_es < p_input->stream.pp_programs[0]->i_es_number;
 365                  i_es++ )
 366             {
 367 #define p_es p_input->stream.pp_programs[0]->pp_es[i_es]
 368                 switch( p_es->i_type )
 369                 {
 370                     case MPEG1_VIDEO_ES:
 371                     case MPEG2_VIDEO_ES:
 372                         input_SelectES( p_input, p_es );
 373                         break;
 374
 375                     case MPEG1_AUDIO_ES:
 376                     case MPEG2_AUDIO_ES:
 377                         if( main_GetIntVariable( INPUT_CHANNEL_VAR, 0 )
 378                                 == (p_es->i_id & 0x1F) )
 379                         switch( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) )
 380                         {
 381                         case 0:
 382                             main_PutIntVariable( INPUT_AUDIO_VAR,
 383                                                  REQUESTED_MPEG );
 384                         case REQUESTED_MPEG:
 385                             input_SelectES( p_input, p_es );
 386                         }
 387                         break;
 388
 389                     case AC3_AUDIO_ES:
 390                         if( main_GetIntVariable( INPUT_CHANNEL_VAR, 0 )
 391                                 == ((p_es->i_id & 0xF00) >> 8) )
 392                         switch( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) )
 393                         {
 394                         case 0:
 395                             main_PutIntVariable( INPUT_AUDIO_VAR,
 396                                                  REQUESTED_AC3 );
 397                         case REQUESTED_AC3:
 398                             input_SelectES( p_input, p_es );
 399                         }
 400                         break;
 401
 402                     case DVD_SPU_ES:
 403                         if( main_GetIntVariable( INPUT_SUBTITLE_VAR, -1 )
 404                                 == ((p_es->i_id & 0x1F00) >> 8) )
 405                         {
 406                             input_SelectES( p_input, p_es );
 407                         }
 408                         break;
 409
 410                     case LPCM_AUDIO_ES:
 411                         /* FIXME ! */
 412                         break;
 413                 }
 414             }
 415
 416         }
 417 #endif
 418 #ifdef STATS
 419         input_DumpStream( p_input );
 420 #endif
 421
 422         /* FIXME : ugly kludge */
 423         p_input->stream.i_size = i_size;
 424
 425         vlc_mutex_unlock( &p_input->stream.stream_lock );
 426     }
 427     else
 428     {
 429         /* The programs will be added when we read them. */
 430         vlc_mutex_lock( &p_input->stream.stream_lock );
 431         p_input->stream.pp_programs[0]->b_is_ok = 0;
 432
 433         /* FIXME : ugly kludge */
 434         p_input->stream.i_size = i_size;
 435
 436         vlc_mutex_unlock( &p_input->stream.stream_lock );
 437     }
 438
 439 }
 440
 441 /*****************************************************************************
 442  * DVDEnd: frees unused data
 443  *****************************************************************************/
 444 static void DVDEnd( input_thread_t * p_input )
 445 {
 446     /* FIXME: check order of calls */
 447 //    CSSEnd( p_input );
 448 //    IfoEnd( (ifo_t*)(&p_input->p_plugin_data->ifo ) );
 449     free( p_input->stream.p_demux_data );
 450     free( p_input->p_plugin_data );
 451     input_NetlistEnd( p_input );
 452 }
 453
 454 /*****************************************************************************
 455  * DVDRead: reads data packets into the netlist.
 456  *****************************************************************************
 457  * Returns -1 in case of error, 0 if everything went well, and 1 in case of
 458  * EOF.
 459  *****************************************************************************/
 460 static int DVDRead( input_thread_t * p_input,
 461                    data_packet_t ** pp_packets )
 462 {
 463     thread_dvd_data_t *     p_method;
 464     netlist_t *             p_netlist;
 465     struct iovec *          p_vec;
 466     struct data_packet_s *  p_data;
 467     u8 *                    pi_cur;
 468     int                     i_packet_size;
 469     int                     i_packet;
 470     int                     i_pos;
 471     int                     i;
 472     boolean_t               b_first_packet;
 473
 474     p_method = ( thread_dvd_data_t * ) p_input->p_plugin_data;
 475     p_netlist = ( netlist_t * ) p_input->p_method_data;
 476
 477     /* Get an iovec pointer */
 478     if( ( p_vec = input_NetlistGetiovec( p_netlist ) ) == NULL )
 479     {
 480         intf_ErrMsg( "DVD: read error" );
 481         return -1;
 482     }
 483
 484     /* Reads from DVD */
 485     readv( p_input->i_handle, p_vec, p_method->i_read_once );
 486
 487 #if defined( HAVE_SYS_DVDIO_H ) || defined( LINUX_DVD )
 488     if( p_method->b_encrypted )
 489     {
 490         for( i=0 ; i<p_method->i_read_once ; i++ )
 491         {
 492             CSSDescrambleSector(
 493                         p_method->css.p_title_key[p_method->i_title].key,
 494                         p_vec[i].iov_base );
 495             ((u8*)(p_vec[i].iov_base))[0x14] &= 0x8F;
 496         }
 497     }
 498 #endif
 499
 500     /* Update netlist indexes */
 501     input_NetlistMviovec( p_netlist, p_method->i_read_once, &p_data );
 502
 503     i_packet = 0;
 504     /* Read headers to compute payload length */
 505     for( i = 0 ; i < p_method->i_read_once ; i++ )
 506     {
 507         i_pos = 0;
 508         b_first_packet = 1;
 509         while( i_pos < p_netlist->i_buffer_size )
 510         {
 511             pi_cur = (u8*)(p_vec[i].iov_base + i_pos);
 512             /*default header */
 513             if( U32_AT( pi_cur ) != 0x1BA )
 514             {
 515                 /* That's the case for all packets, except pack header. */
 516                 i_packet_size = U16_AT( pi_cur + 4 );
 517             }
 518             else
 519             {
 520                 /* Pack header. */
 521                 if( ( pi_cur[4] & 0xC0 ) == 0x40 )
 522                 {
 523                     /* MPEG-2 */
 524                     i_packet_size = 8;
 525                 }
 526                 else if( ( pi_cur[4] & 0xF0 ) == 0x20 )
 527                 {
 528                     /* MPEG-1 */
 529                     i_packet_size = 6;
 530                 }
 531                 else
 532                 {
 533                     intf_ErrMsg( "Unable to determine stream type" );
 534                     return( -1 );
 535                 }
 536             }
 537             if( b_first_packet )
 538             {
 539                 p_data->b_discard_payload = 0;
 540                 b_first_packet = 0;
 541             }
 542             else
 543             {
 544                 p_data = input_NetlistNewPacket( p_netlist ,
 545                                                  i_packet_size + 6 );
 546                 memcpy( p_data->p_buffer,
 547                         p_vec[i].iov_base + i_pos , i_packet_size + 6 );
 548             }
 549
 550             p_data->p_payload_end = p_data->p_payload_start + i_packet_size + 6;
 551             pp_packets[i_packet] = p_data;
 552             i_packet++;
 553             i_pos += i_packet_size + 6;
 554         }
 555     }
 556     pp_packets[i_packet] = NULL;
 557
 558     vlc_mutex_lock( &p_input->stream.stream_lock );
 559     p_input->stream.i_tell += p_method->i_read_once *DVD_LB_SIZE;
 560     vlc_mutex_unlock( &p_input->stream.stream_lock );
 561
 562     return( 0 );
 563 }
 564
 565
 566 /*****************************************************************************
 567  * DVDRewind : reads a stream backward
 568  *****************************************************************************/
 569 static int DVDRewind( input_thread_t * p_input )
 570 {
 571     return( -1 );
 572 }
 573
 574 /*****************************************************************************
 575  * DVDSeek : Goes to a given position on the stream ; this one is used by the
 576  * input and translate chronological position from input to logical postion
 577  * on the device
 578  *****************************************************************************/
 579 static void DVDSeek( input_thread_t * p_input, off_t i_off )
 580 {
 581     thread_dvd_data_t *     p_method;
 582     off_t                   i_pos;
 583
 584     p_method = ( thread_dvd_data_t * )p_input->p_plugin_data;
 585
 586     /* We have to take care of offset of beginning of title */
 587     i_pos = i_off + p_method->i_start_byte;
 588
 589     /* With DVD, we have to be on a sector boundary */
 590     i_pos = i_pos & (~0x7ff);
 591
 592     i_pos = lseek( p_input->i_handle, i_pos, SEEK_SET );
 593
 594     p_input->stream.i_tell = i_pos - p_method->i_start_byte;
 595
 596     return;
 597 }