git.sesse.net Git - vlc/blob - src/input/input_programs.c

   1 /*****************************************************************************
   2  * input_programs.c: es_descriptor_t, pgrm_descriptor_t management
   3  *****************************************************************************
   4  * Copyright (C) 1999-2002 VideoLAN
   5  * $Id: input_programs.c,v 1.105 2003/05/04 22:42:17 gbazin Exp $
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>
  28 #include <string.h>                                    /* memcpy(), memset() */
  29
  30 #include <vlc/vlc.h>
  31
  32 #include "stream_control.h"
  33 #include "input_ext-intf.h"
  34 #include "input_ext-dec.h"
  35 #include "input_ext-plugins.h"
  36
  37 /*
  38  * NOTICE : all of these functions expect you to have taken the lock on
  39  * p_input->stream.lock
  40  */
  41
  42 /* Navigation callbacks */
  43 static int ProgramCallback( vlc_object_t *, char const *,
  44                             vlc_value_t, vlc_value_t, void * );
  45 static int TitleCallback( vlc_object_t *, char const *,
  46                           vlc_value_t, vlc_value_t, void * );
  47 static int ChapterCallback( vlc_object_t *, char const *,
  48                             vlc_value_t, vlc_value_t, void * );
  49 static int NavigationCallback( vlc_object_t *, char const *,
  50                                vlc_value_t, vlc_value_t, void * );
  51
  52 /*****************************************************************************
  53  * input_InitStream: init the stream descriptor of the given input
  54  *****************************************************************************/
  55 int input_InitStream( input_thread_t * p_input, size_t i_data_len )
  56 {
  57
  58     p_input->stream.i_stream_id = 0;
  59
  60     /* initialized to 0 since we don't give the signal to the interface
  61      * before the end of input initialization */
  62     p_input->stream.b_changed = 0;
  63     p_input->stream.pp_es = NULL;
  64     p_input->stream.pp_selected_es = NULL;
  65     p_input->stream.p_removed_es = NULL;
  66     p_input->stream.p_newly_selected_es = NULL;
  67     p_input->stream.pp_programs = NULL;
  68     p_input->stream.p_selected_program = NULL;
  69     p_input->stream.p_new_program = NULL;
  70
  71     if( i_data_len )
  72     {
  73         if ( (p_input->stream.p_demux_data = malloc( i_data_len )) == NULL )
  74         {
  75             msg_Err( p_input, "out of memory" );
  76             return 1;
  77         }
  78         memset( p_input->stream.p_demux_data, 0, i_data_len );
  79     }
  80     else
  81     {
  82         p_input->stream.p_demux_data = NULL;
  83     }
  84
  85     /* Create a few object variables used for navigation in the interfaces */
  86     var_Create( p_input, "program", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
  87     var_Create( p_input, "title", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
  88     var_Create( p_input, "chapter", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
  89     var_Create( p_input, "navigation", VLC_VAR_VARIABLE | VLC_VAR_HASCHOICE );
  90     var_AddCallback( p_input, "program", ProgramCallback, NULL );
  91     var_AddCallback( p_input, "title", TitleCallback, NULL );
  92     var_AddCallback( p_input, "chapter", ChapterCallback, NULL );
  93
  94     return 0;
  95 }
  96
  97 /*****************************************************************************
  98  * input_EndStream: free all stream descriptors
  99  *****************************************************************************/
 100 void input_EndStream( input_thread_t * p_input )
 101 {
 102     /* Free navigation variables */
 103     var_Destroy( p_input, "program" );
 104     var_Destroy( p_input, "title" );
 105     var_Destroy( p_input, "chapter" );
 106
 107     /* Free all programs and associated ES, and associated decoders. */
 108     while( p_input->stream.i_pgrm_number )
 109     {
 110         input_DelProgram( p_input, p_input->stream.pp_programs[0] );
 111     }
 112
 113     /* Free standalone ES */
 114     while( p_input->stream.i_es_number )
 115     {
 116         input_DelES( p_input, p_input->stream.pp_es[0] );
 117     }
 118
 119     /* Free all areas */
 120     while( p_input->stream.i_area_nb )
 121     {
 122         input_DelArea( p_input, p_input->stream.pp_areas[0] );
 123     }
 124
 125     /* Free selected ES */
 126     if( p_input->stream.pp_selected_es != NULL )
 127     {
 128         free( p_input->stream.pp_selected_es );
 129     }
 130
 131     if( p_input->stream.p_demux_data != NULL )
 132     {
 133         free( p_input->stream.p_demux_data );
 134     }
 135 }
 136
 137 /*****************************************************************************
 138  * input_FindProgram: returns a pointer to a program described by its ID
 139  *****************************************************************************/
 140 pgrm_descriptor_t * input_FindProgram( input_thread_t * p_input,
 141                                        uint16_t i_pgrm_id )
 142 {
 143     unsigned int i;
 144
 145     for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
 146     {
 147         if( p_input->stream.pp_programs[i]->i_number == i_pgrm_id )
 148         {
 149             return p_input->stream.pp_programs[i];
 150         }
 151     }
 152
 153     return NULL;
 154 }
 155
 156 /*****************************************************************************
 157  * input_AddProgram: add and init a program descriptor
 158  *****************************************************************************
 159  * This program descriptor will be referenced in the given stream descriptor
 160  *****************************************************************************/
 161 pgrm_descriptor_t * input_AddProgram( input_thread_t * p_input,
 162                                       u16 i_pgrm_id, size_t i_data_len )
 163 {
 164     /* Where to add the pgrm */
 165     pgrm_descriptor_t * p_pgrm = malloc( sizeof(pgrm_descriptor_t) );
 166     vlc_value_t val;
 167
 168     if( p_pgrm == NULL )
 169     {
 170         msg_Err( p_input, "out of memory" );
 171         return NULL;
 172     }
 173
 174     /* Init this entry */
 175     p_pgrm->i_number = i_pgrm_id;
 176     p_pgrm->b_is_ok = 0;
 177     p_pgrm->i_version = 0;
 178
 179     p_pgrm->i_es_number = 0;
 180     p_pgrm->pp_es = NULL;
 181
 182     input_ClockInit( p_pgrm );
 183
 184     p_pgrm->i_synchro_state = SYNCHRO_START;
 185
 186     if( i_data_len )
 187     {
 188         p_pgrm->p_demux_data = malloc( i_data_len );
 189         if( p_pgrm->p_demux_data == NULL )
 190         {
 191             msg_Err( p_input, "out of memory" );
 192             return NULL;
 193         }
 194         memset( p_pgrm->p_demux_data, 0, i_data_len );
 195     }
 196     else
 197     {
 198         p_pgrm->p_demux_data = NULL;
 199     }
 200
 201     /* Add an entry to the list of program associated with the stream */
 202     INSERT_ELEM( p_input->stream.pp_programs,
 203                  p_input->stream.i_pgrm_number,
 204                  p_input->stream.i_pgrm_number,
 205                  p_pgrm );
 206
 207     val.i_int = i_pgrm_id;
 208     var_Change( p_input, "program", VLC_VAR_ADDCHOICE, &val, NULL );
 209
 210     return p_pgrm;
 211 }
 212
 213 /*****************************************************************************
 214  * input_DelProgram: destroy a program descriptor
 215  *****************************************************************************
 216  * All ES descriptions referenced in the descriptor will be deleted.
 217  *****************************************************************************/
 218 void input_DelProgram( input_thread_t * p_input, pgrm_descriptor_t * p_pgrm )
 219 {
 220     unsigned int i_pgrm_index;
 221     vlc_value_t val;
 222
 223     /* Find the program in the programs table */
 224     for( i_pgrm_index = 0; i_pgrm_index < p_input->stream.i_pgrm_number;
 225          i_pgrm_index++ )
 226     {
 227         if( p_input->stream.pp_programs[i_pgrm_index] == p_pgrm )
 228             break;
 229     }
 230
 231     /* If the program wasn't found, do nothing */
 232     if( i_pgrm_index == p_input->stream.i_pgrm_number )
 233     {
 234         msg_Err( p_input, "program does not belong to this input" );
 235         return;
 236     }
 237
 238     val.i_int = i_pgrm_index;
 239     var_Change( p_input, "program", VLC_VAR_DELCHOICE, &val, NULL );
 240
 241     /* Free the structures that describe the es that belongs to that program */
 242     while( p_pgrm->i_es_number )
 243     {
 244         input_DelES( p_input, p_pgrm->pp_es[0] );
 245     }
 246
 247     /* Free the demux data */
 248     if( p_pgrm->p_demux_data != NULL )
 249     {
 250         free( p_pgrm->p_demux_data );
 251     }
 252
 253     /* Remove this program from the stream's list of programs */
 254     REMOVE_ELEM( p_input->stream.pp_programs,
 255                  p_input->stream.i_pgrm_number,
 256                  i_pgrm_index );
 257
 258     /* Free the description of this program */
 259     free( p_pgrm );
 260 }
 261
 262 /*****************************************************************************
 263  * input_AddArea: add and init an area descriptor
 264  *****************************************************************************
 265  * This area descriptor will be referenced in the given stream descriptor
 266  *****************************************************************************/
 267 input_area_t * input_AddArea( input_thread_t * p_input,
 268                               uint16_t i_area_id, uint16_t i_part_nb )
 269 {
 270     /* Where to add the pgrm */
 271     input_area_t * p_area = malloc( sizeof(input_area_t) );
 272     vlc_value_t val;
 273     int i;
 274
 275     if( p_area == NULL )
 276     {
 277         msg_Err( p_input, "out of memory" );
 278         return NULL;
 279     }
 280
 281     /* Init this entry */
 282     p_area->i_id = i_area_id;
 283     p_area->i_part_nb = i_part_nb;
 284     p_area->i_part= 0;
 285     p_area->i_start = 0;
 286     p_area->i_size = 0;
 287     p_area->i_tell = 0;
 288     p_area->i_seek = NO_SEEK;
 289
 290     /* Add an entry to the list of program associated with the stream */
 291     INSERT_ELEM( p_input->stream.pp_areas,
 292                  p_input->stream.i_area_nb,
 293                  p_input->stream.i_area_nb,
 294                  p_area );
 295
 296     /* Don't add empty areas */
 297     if( i_part_nb == 0 )
 298         return NULL;
 299
 300     /* Take care of the navigation variables */
 301     val.i_int = i_area_id;
 302     var_Change( p_input, "title", VLC_VAR_ADDCHOICE, &val, NULL );
 303
 304     val.psz_string = malloc( sizeof("title ") + 5 );
 305     if( val.psz_string )
 306     {
 307         vlc_value_t val2;
 308
 309         sprintf( val.psz_string, "title %2i", i_area_id );
 310         var_Destroy( p_input, val.psz_string );
 311         var_Create( p_input, val.psz_string, VLC_VAR_INTEGER |
 312                     VLC_VAR_HASCHOICE | VLC_VAR_ISCOMMAND );
 313         var_AddCallback( p_input, val.psz_string, NavigationCallback,
 314                          (void *)(int)i_area_id );
 315
 316         var_Change( p_input, "navigation", VLC_VAR_ADDCHOICE, &val, NULL );
 317
 318         for( i = 1; i <= i_part_nb; i++ )
 319         {
 320             val2.i_int = i;
 321             var_Change( p_input, val.psz_string,
 322                         VLC_VAR_ADDCHOICE, &val2, NULL );
 323         }
 324     }
 325
 326     return p_area;
 327 }
 328
 329 /*****************************************************************************
 330  * input_SetProgram: changes the current program
 331  *****************************************************************************/
 332 int input_SetProgram( input_thread_t * p_input, pgrm_descriptor_t * p_new_prg )
 333 {
 334     unsigned int i_es_index;
 335     int i_required_audio_es;
 336     int i_required_spu_es;
 337     int i_audio_es = 0;
 338     int i_spu_es = 0;
 339     vlc_value_t val;
 340
 341     if ( p_input->stream.p_selected_program )
 342     {
 343         for ( i_es_index = 1 ; /* 0 should be the PMT */
 344                 i_es_index < p_input->stream.p_selected_program->
 345                 i_es_number ;
 346                 i_es_index ++ )
 347         {
 348 #define p_es p_input->stream.p_selected_program->pp_es[i_es_index]
 349             if ( p_es->p_decoder_fifo ) /* if the ES was selected */
 350             {
 351                 input_UnselectES( p_input , p_es );
 352             }
 353 #undef p_es
 354         }
 355     }
 356     /* Get the number of the required audio stream */
 357     if( config_GetInt( p_input, "audio" ) )
 358     {
 359         /* Default is the first one */
 360         i_required_audio_es = config_GetInt( p_input, "audio-channel" );
 361         if( i_required_audio_es < 0 )
 362         {
 363             i_required_audio_es = 1;
 364         }
 365     }
 366     else
 367     {
 368         i_required_audio_es = 0;
 369     }
 370
 371     /* Same thing for subtitles */
 372     if( config_GetInt( p_input, "video" ) )
 373     {
 374         /* for spu, default is none */
 375         i_required_spu_es = config_GetInt( p_input, "spu-channel" );
 376         if( i_required_spu_es < 0 )
 377         {
 378             i_required_spu_es = 0;
 379         }
 380     }
 381     else
 382     {
 383         i_required_spu_es = 0;
 384     }
 385
 386     for( i_es_index = 0 ; i_es_index < p_new_prg->i_es_number ; i_es_index ++ )
 387     {
 388         switch( p_new_prg->pp_es[i_es_index]->i_cat )
 389         {
 390             case VIDEO_ES:
 391                 msg_Dbg( p_input, "selecting ES %x",
 392                          p_new_prg->pp_es[i_es_index]->i_id );
 393                 input_SelectES( p_input, p_new_prg->pp_es[i_es_index] );
 394                 break;
 395             case AUDIO_ES:
 396                 i_audio_es += 1;
 397                 if( i_audio_es <= i_required_audio_es )
 398                 {
 399                     msg_Dbg( p_input, "selecting ES %x",
 400                              p_new_prg->pp_es[i_es_index]->i_id );
 401                     input_SelectES( p_input, p_new_prg->pp_es[i_es_index]);
 402                 }
 403                 break;
 404             /* Not sure this one is fully specification-compliant */
 405             case SPU_ES :
 406                 i_spu_es += 1;
 407                 if( i_spu_es <= i_required_spu_es )
 408                 {
 409                     msg_Dbg( p_input, "selecting ES %x",
 410                              p_new_prg->pp_es[i_es_index]->i_id );
 411                     input_SelectES( p_input, p_new_prg->pp_es[i_es_index] );
 412                 }
 413             break;
 414             default :
 415                 msg_Dbg( p_input, "ES %x has unknown type",
 416                          p_new_prg->pp_es[i_es_index]->i_id );
 417                 break;
 418         }
 419
 420     }
 421
 422
 423     p_input->stream.p_selected_program = p_new_prg;
 424
 425     /* Update the navigation variables without triggering a callback */
 426     val.i_int = p_new_prg->i_number;
 427     var_Change( p_input, "program", VLC_VAR_SETVALUE, &val, NULL );
 428
 429     return( 0 );
 430 }
 431
 432 /*****************************************************************************
 433  * input_DelArea: destroy a area descriptor
 434  *****************************************************************************
 435  * All ES descriptions referenced in the descriptor will be deleted.
 436  *****************************************************************************/
 437 void input_DelArea( input_thread_t * p_input, input_area_t * p_area )
 438 {
 439     unsigned int i_area_index;
 440     vlc_value_t val;
 441
 442     /* Find the area in the areas table */
 443     for( i_area_index = 0; i_area_index < p_input->stream.i_area_nb;
 444          i_area_index++ )
 445     {
 446         if( p_input->stream.pp_areas[i_area_index] == p_area )
 447             break;
 448     }
 449
 450     /* If the area wasn't found, do nothing */
 451     if( i_area_index == p_input->stream.i_area_nb )
 452     {
 453         msg_Err( p_input, "area does not belong to this input" );
 454         return;
 455     }
 456
 457     /* Take care of the navigation variables */
 458     val.psz_string = malloc( sizeof("title ") + 5 );
 459     if( val.psz_string )
 460     {
 461         sprintf( val.psz_string, "title %i", p_area->i_id );
 462         var_Change( p_input, "navigation", VLC_VAR_DELCHOICE, &val, NULL );
 463         var_Destroy( p_input, val.psz_string );
 464     }
 465
 466     /* Remove this area from the stream's list of areas */
 467     REMOVE_ELEM( p_input->stream.pp_areas,
 468                  p_input->stream.i_area_nb,
 469                  i_area_index );
 470
 471     /* Free the description of this area */
 472     free( p_area );
 473 }
 474
 475
 476 /*****************************************************************************
 477  * input_FindES: returns a pointer to an ES described by its ID
 478  *****************************************************************************/
 479 es_descriptor_t * input_FindES( input_thread_t * p_input, uint16_t i_es_id )
 480 {
 481     unsigned int i;
 482
 483     for( i = 0; i < p_input->stream.i_es_number; i++ )
 484     {
 485         if( p_input->stream.pp_es[i]->i_id == i_es_id )
 486         {
 487             return p_input->stream.pp_es[i];
 488         }
 489     }
 490
 491     return NULL;
 492 }
 493
 494 /*****************************************************************************
 495  * input_AddES:
 496  *****************************************************************************
 497  * Reserve a slot in the table of ES descriptors for the ES and add it to the
 498  * list of ES of p_pgrm. If p_pgrm if NULL, then the ES is considered as stand
 499  * alone (PSI ?)
 500  *****************************************************************************/
 501 es_descriptor_t * input_AddES( input_thread_t * p_input,
 502                                pgrm_descriptor_t * p_pgrm, u16 i_es_id,
 503                                size_t i_data_len )
 504 {
 505     es_descriptor_t * p_es;
 506
 507     p_es = (es_descriptor_t *)malloc( sizeof(es_descriptor_t) );
 508     if( p_es == NULL )
 509     {
 510         msg_Err( p_input, "out of memory" );
 511         return( NULL);
 512     }
 513
 514     INSERT_ELEM( p_input->stream.pp_es,
 515                  p_input->stream.i_es_number,
 516                  p_input->stream.i_es_number,
 517                  p_es );
 518
 519     /* Init its values */
 520     p_es->i_id = i_es_id;
 521     p_es->psz_desc[0] = '\0';
 522     p_es->p_pes = NULL;
 523     p_es->p_decoder_fifo = NULL;
 524     p_es->i_cat = UNKNOWN_ES;
 525     p_es->i_demux_fd = 0;
 526     p_es->c_packets = 0;
 527     p_es->c_invalid_packets = 0;
 528     p_es->b_force_decoder = VLC_FALSE;
 529
 530     if( i_data_len )
 531     {
 532         p_es->p_demux_data = malloc( i_data_len );
 533         if( p_es->p_demux_data == NULL )
 534         {
 535             msg_Err( p_input, "out of memory" );
 536             return( NULL );
 537         }
 538         memset( p_es->p_demux_data, 0, i_data_len );
 539     }
 540     else
 541     {
 542         p_es->p_demux_data = NULL;
 543     }
 544     p_es->p_waveformatex     = NULL;
 545     p_es->p_bitmapinfoheader = NULL;
 546
 547     /* Add this ES to the program definition if one is given */
 548     if( p_pgrm )
 549     {
 550         INSERT_ELEM( p_pgrm->pp_es,
 551                      p_pgrm->i_es_number,
 552                      p_pgrm->i_es_number,
 553                      p_es );
 554         p_es->p_pgrm = p_pgrm;
 555     }
 556     else
 557     {
 558         p_es->p_pgrm = NULL;
 559     }
 560
 561     return p_es;
 562 }
 563
 564 /*****************************************************************************
 565  * input_DelES:
 566  *****************************************************************************/
 567 void input_DelES( input_thread_t * p_input, es_descriptor_t * p_es )
 568 {
 569     unsigned int            i_index, i_es_index;
 570     pgrm_descriptor_t *     p_pgrm;
 571
 572     /* Find the ES in the ES table */
 573     for( i_es_index = 0; i_es_index < p_input->stream.i_es_number;
 574          i_es_index++ )
 575     {
 576         if( p_input->stream.pp_es[i_es_index] == p_es )
 577             break;
 578     }
 579
 580     /* If the ES wasn't found, do nothing */
 581     if( i_es_index == p_input->stream.i_es_number )
 582     {
 583         msg_Err( p_input, "ES does not belong to this input" );
 584         return;
 585     }
 586
 587     p_pgrm = p_es->p_pgrm;
 588
 589     /* Kill associated decoder, if any. */
 590     if( p_es->p_decoder_fifo != NULL )
 591     {
 592         input_EndDecoder( p_input, p_es );
 593     }
 594
 595     /* Remove this ES from the description of the program if it is associated to
 596      * one */
 597     if( p_pgrm )
 598     {
 599         for( i_index = 0; i_index < p_pgrm->i_es_number; i_index++ )
 600         {
 601             if( p_pgrm->pp_es[i_index] == p_es )
 602             {
 603                 REMOVE_ELEM( p_pgrm->pp_es,
 604                              p_pgrm->i_es_number,
 605                              i_index );
 606                 break;
 607             }
 608         }
 609     }
 610
 611     /* Free the demux data */
 612     if( p_es->p_demux_data != NULL )
 613     {
 614         free( p_es->p_demux_data );
 615     }
 616     if( p_es->p_waveformatex )
 617     {
 618         free( p_es->p_waveformatex );
 619     }
 620     if( p_es->p_bitmapinfoheader )
 621     {
 622         free( p_es->p_bitmapinfoheader );
 623     }
 624
 625     /* Find the ES in the ES table */
 626     for( i_es_index = 0; i_es_index < p_input->stream.i_es_number;
 627          i_es_index++ )
 628     {
 629         if( p_input->stream.pp_es[i_es_index] == p_es )
 630             break;
 631     }
 632
 633     /* Remove this ES from the stream's list of ES */
 634     REMOVE_ELEM( p_input->stream.pp_es,
 635                  p_input->stream.i_es_number,
 636                  i_es_index );
 637
 638     /* Free the ES */
 639     free( p_es );
 640 }
 641
 642 /*****************************************************************************
 643  * input_SelectES: selects an ES and spawns the associated decoder
 644  *****************************************************************************
 645  * Remember we are still supposed to have stream_lock when entering this
 646  * function ?
 647  *****************************************************************************/
 648 int input_SelectES( input_thread_t * p_input, es_descriptor_t * p_es )
 649 {
 650     if( p_es == NULL )
 651     {
 652         msg_Err( p_input, "nothing to do in input_SelectES" );
 653         return -1;
 654     }
 655
 656     if( ((p_es->i_cat == VIDEO_ES) || (p_es->i_cat == SPU_ES))
 657         && !config_GetInt( p_input, "video" ) )
 658     {
 659         msg_Dbg( p_input,
 660                  "video is disabled, not selecting ES 0x%x", p_es->i_id );
 661         return -1;
 662     }
 663
 664     if( (p_es->i_cat == AUDIO_ES) && !config_GetInt( p_input, "audio" ) )
 665     {
 666         msg_Dbg( p_input,
 667                  "audio is disabled, not selecting ES 0x%x", p_es->i_id );
 668         return -1;
 669     }
 670
 671     msg_Dbg( p_input, "selecting ES 0x%x", p_es->i_id );
 672
 673     if( p_es->p_decoder_fifo != NULL )
 674     {
 675         msg_Err( p_input, "ES 0x%x is already selected", p_es->i_id );
 676         return -1;
 677     }
 678
 679     /* Release the lock, not to block the input thread during
 680      * the creation of the thread. */
 681     vlc_mutex_unlock( &p_input->stream.stream_lock );
 682     p_es->p_decoder_fifo = input_RunDecoder( p_input, p_es );
 683     vlc_mutex_lock( &p_input->stream.stream_lock );
 684
 685     if( p_es->p_decoder_fifo == NULL )
 686     {
 687         return -1;
 688     }
 689
 690     return 0;
 691 }
 692
 693 /*****************************************************************************
 694  * input_UnselectES: removes an ES from the list of selected ES
 695  *****************************************************************************/
 696 int input_UnselectES( input_thread_t * p_input, es_descriptor_t * p_es )
 697 {
 698
 699     unsigned int i_index = 0;
 700
 701     if( p_es == NULL )
 702     {
 703         msg_Err( p_input, "nothing to do in input_UnselectES" );
 704         return -1;
 705     }
 706
 707     msg_Dbg( p_input, "unselecting ES 0x%x", p_es->i_id );
 708
 709     if( p_es->p_decoder_fifo == NULL )
 710     {
 711         msg_Err( p_input, "ES 0x%x is not selected", p_es->i_id );
 712         return( -1 );
 713     }
 714
 715     input_EndDecoder( p_input, p_es );
 716     p_es->p_pes = NULL;
 717
 718     if( ( p_es->p_decoder_fifo == NULL ) &&
 719         ( p_input->stream.i_selected_es_number > 0 ) )
 720     {
 721         while( ( i_index < p_input->stream.i_selected_es_number - 1 ) &&
 722                ( p_input->stream.pp_selected_es[i_index] != p_es ) )
 723         {
 724             i_index++;
 725         }
 726
 727         /* XXX: no need to memmove, we have unsorted data */
 728         REMOVE_ELEM( p_input->stream.pp_selected_es,
 729                      p_input->stream.i_selected_es_number,
 730                      i_index );
 731
 732         if( p_input->stream.i_selected_es_number == 0 )
 733         {
 734             msg_Dbg( p_input, "no more selected ES" );
 735             return 1;
 736         }
 737     }
 738
 739     return 0;
 740 }
 741
 742 /*****************************************************************************
 743  * Navigation callback: a bunch of navigation variables are used as an
 744  *  alternative to the navigation API.
 745  *****************************************************************************/
 746 static int ProgramCallback( vlc_object_t *p_this, char const *psz_cmd,
 747                   vlc_value_t oldval, vlc_value_t newval, void *p_data )
 748 {
 749     input_thread_t *p_input = (input_thread_t *)p_this;
 750
 751     if( oldval.i_int == newval.i_int )
 752        return VLC_SUCCESS;
 753
 754     vlc_mutex_lock( &p_input->stream.stream_lock );
 755     if( ( newval.i_int > 0 ) )
 756     {
 757         vlc_mutex_unlock( &p_input->stream.stream_lock );
 758         input_ChangeProgram( p_input, (uint16_t)newval.i_int );
 759         input_SetStatus( p_input, INPUT_STATUS_PLAY );
 760         vlc_mutex_lock( &p_input->stream.stream_lock );
 761     }
 762     vlc_mutex_unlock( &p_input->stream.stream_lock );
 763
 764     return VLC_SUCCESS;
 765 }
 766
 767 static int TitleCallback( vlc_object_t *p_this, char const *psz_cmd,
 768                   vlc_value_t oldval, vlc_value_t newval, void *p_data )
 769 {
 770     input_thread_t *p_input = (input_thread_t *)p_this;
 771     input_area_t *p_area;
 772
 773     if( oldval.i_int == newval.i_int )
 774        return VLC_SUCCESS;
 775
 776     /* Sanity check should have already be done by var_Set(). */
 777     vlc_mutex_lock( &p_input->stream.stream_lock );
 778     p_area = p_input->stream.pp_areas[newval.i_int];
 779     p_area->i_part = 1;
 780     vlc_mutex_unlock( &p_input->stream.stream_lock );
 781     input_ChangeArea( p_input, p_area );
 782     input_SetStatus( p_input, INPUT_STATUS_PLAY );
 783
 784     return VLC_SUCCESS;
 785 }
 786
 787 static int ChapterCallback( vlc_object_t *p_this, char const *psz_cmd,
 788                   vlc_value_t oldval, vlc_value_t newval, void *p_data )
 789 {
 790     input_thread_t *p_input = (input_thread_t *)p_this;
 791     input_area_t *p_area;
 792
 793     if( oldval.i_int == newval.i_int )
 794        return VLC_SUCCESS;
 795
 796     /* Sanity check will have already be done by var_Set(). */
 797     vlc_mutex_lock( &p_input->stream.stream_lock );
 798     p_area = p_input->stream.p_selected_area;
 799     p_input->stream.p_selected_area->i_part = newval.i_int;
 800     vlc_mutex_unlock( &p_input->stream.stream_lock );
 801
 802     input_ChangeArea( p_input, p_area );
 803     input_SetStatus( p_input, INPUT_STATUS_PLAY );
 804
 805     return VLC_SUCCESS;
 806 }
 807
 808 static int NavigationCallback( vlc_object_t *p_this, char const *psz_cmd,
 809                   vlc_value_t oldval, vlc_value_t newval, void *p_data )
 810 {
 811     input_thread_t *p_input = (input_thread_t *)p_this;
 812     uint16_t i_area_id = (int)p_data;
 813
 814     vlc_mutex_lock( &p_input->stream.stream_lock );
 815
 816     if( p_input->stream.p_selected_area->i_id == i_area_id &&
 817         oldval.i_int == newval.i_int )
 818     {
 819         /* Nothing to do */
 820         vlc_mutex_unlock( &p_input->stream.stream_lock );
 821         return VLC_SUCCESS;
 822     }
 823
 824     if( ( i_area_id < p_input->stream.i_area_nb ) && ( newval.i_int > 0 ) &&
 825         ( (uint16_t)newval.i_int <=
 826           p_input->stream.pp_areas[i_area_id]->i_part_nb ) )
 827     {
 828         input_area_t *p_area = p_input->stream.pp_areas[i_area_id];
 829         p_input->stream.p_selected_area->i_part = newval.i_int;
 830         vlc_mutex_unlock( &p_input->stream.stream_lock );
 831         input_ChangeArea( p_input, p_area );
 832         input_SetStatus( p_input, INPUT_STATUS_PLAY );
 833         vlc_mutex_lock( &p_input->stream.stream_lock );
 834     }
 835     vlc_mutex_unlock( &p_input->stream.stream_lock );
 836
 837     return VLC_SUCCESS;
 838 }