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 1.104 2003/04/13 20:00:21 fenrir 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 );
 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 );
 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 );
 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 );
 317
 318         for( i = 1; i <= i_part_nb; i++ )
 319         {
 320             val2.i_int = i;
 321             var_Change( p_input, val.psz_string, VLC_VAR_ADDCHOICE, &val2 );
 322         }
 323     }
 324
 325     return p_area;
 326 }
 327
 328 /*****************************************************************************
 329  * input_SetProgram: changes the current program
 330  *****************************************************************************/
 331 int input_SetProgram( input_thread_t * p_input, pgrm_descriptor_t * p_new_prg )
 332 {
 333     unsigned int i_es_index;
 334     int i_required_audio_es;
 335     int i_required_spu_es;
 336     int i_audio_es = 0;
 337     int i_spu_es = 0;
 338     vlc_value_t val;
 339
 340     if ( p_input->stream.p_selected_program )
 341     {
 342         for ( i_es_index = 1 ; /* 0 should be the PMT */
 343                 i_es_index < p_input->stream.p_selected_program->
 344                 i_es_number ;
 345                 i_es_index ++ )
 346         {
 347 #define p_es p_input->stream.p_selected_program->pp_es[i_es_index]
 348             if ( p_es->p_decoder_fifo ) /* if the ES was selected */
 349             {
 350                 input_UnselectES( p_input , p_es );
 351             }
 352 #undef p_es
 353         }
 354     }
 355     /* Get the number of the required audio stream */
 356     if( config_GetInt( p_input, "audio" ) )
 357     {
 358         /* Default is the first one */
 359         i_required_audio_es = config_GetInt( p_input, "audio-channel" );
 360         if( i_required_audio_es < 0 )
 361         {
 362             i_required_audio_es = 1;
 363         }
 364     }
 365     else
 366     {
 367         i_required_audio_es = 0;
 368     }
 369
 370     /* Same thing for subtitles */
 371     if( config_GetInt( p_input, "video" ) )
 372     {
 373         /* for spu, default is none */
 374         i_required_spu_es = config_GetInt( p_input, "spu-channel" );
 375         if( i_required_spu_es < 0 )
 376         {
 377             i_required_spu_es = 0;
 378         }
 379     }
 380     else
 381     {
 382         i_required_spu_es = 0;
 383     }
 384
 385     for( i_es_index = 0 ; i_es_index < p_new_prg->i_es_number ; i_es_index ++ )
 386     {
 387         switch( p_new_prg->pp_es[i_es_index]->i_cat )
 388         {
 389             case VIDEO_ES:
 390                 msg_Dbg( p_input, "selecting ES %x",
 391                          p_new_prg->pp_es[i_es_index]->i_id );
 392                 input_SelectES( p_input, p_new_prg->pp_es[i_es_index] );
 393                 break;
 394             case AUDIO_ES:
 395                 i_audio_es += 1;
 396                 if( i_audio_es <= i_required_audio_es )
 397                 {
 398                     msg_Dbg( p_input, "selecting ES %x",
 399                              p_new_prg->pp_es[i_es_index]->i_id );
 400                     input_SelectES( p_input, p_new_prg->pp_es[i_es_index]);
 401                 }
 402                 break;
 403             /* Not sure this one is fully specification-compliant */
 404             case SPU_ES :
 405                 i_spu_es += 1;
 406                 if( i_spu_es <= i_required_spu_es )
 407                 {
 408                     msg_Dbg( p_input, "selecting ES %x",
 409                              p_new_prg->pp_es[i_es_index]->i_id );
 410                     input_SelectES( p_input, p_new_prg->pp_es[i_es_index] );
 411                 }
 412             break;
 413             default :
 414                 msg_Dbg( p_input, "ES %x has unknown type",
 415                          p_new_prg->pp_es[i_es_index]->i_id );
 416                 break;
 417         }
 418
 419     }
 420
 421
 422     p_input->stream.p_selected_program = p_new_prg;
 423
 424     /* Update the navigation variables without triggering a callback */
 425     val.i_int = p_new_prg->i_number;
 426     var_Change( p_input, "program", VLC_VAR_SETVALUE, &val );
 427
 428     return( 0 );
 429 }
 430
 431 /*****************************************************************************
 432  * input_DelArea: destroy a area descriptor
 433  *****************************************************************************
 434  * All ES descriptions referenced in the descriptor will be deleted.
 435  *****************************************************************************/
 436 void input_DelArea( input_thread_t * p_input, input_area_t * p_area )
 437 {
 438     unsigned int i_area_index;
 439     vlc_value_t val;
 440
 441     /* Find the area in the areas table */
 442     for( i_area_index = 0; i_area_index < p_input->stream.i_area_nb;
 443          i_area_index++ )
 444     {
 445         if( p_input->stream.pp_areas[i_area_index] == p_area )
 446             break;
 447     }
 448
 449     /* If the area wasn't found, do nothing */
 450     if( i_area_index == p_input->stream.i_area_nb )
 451     {
 452         msg_Err( p_input, "area does not belong to this input" );
 453         return;
 454     }
 455
 456     /* Take care of the navigation variables */
 457     val.psz_string = malloc( sizeof("title ") + 5 );
 458     if( val.psz_string )
 459     {
 460         sprintf( val.psz_string, "title %i", p_area->i_id );
 461         var_Change( p_input, "navigation", VLC_VAR_DELCHOICE, &val );
 462         var_Destroy( p_input, val.psz_string );
 463     }
 464
 465     /* Remove this area from the stream's list of areas */
 466     REMOVE_ELEM( p_input->stream.pp_areas,
 467                  p_input->stream.i_area_nb,
 468                  i_area_index );
 469
 470     /* Free the description of this area */
 471     free( p_area );
 472 }
 473
 474
 475 /*****************************************************************************
 476  * input_FindES: returns a pointer to an ES described by its ID
 477  *****************************************************************************/
 478 es_descriptor_t * input_FindES( input_thread_t * p_input, uint16_t i_es_id )
 479 {
 480     unsigned int i;
 481
 482     for( i = 0; i < p_input->stream.i_es_number; i++ )
 483     {
 484         if( p_input->stream.pp_es[i]->i_id == i_es_id )
 485         {
 486             return p_input->stream.pp_es[i];
 487         }
 488     }
 489
 490     return NULL;
 491 }
 492
 493 /*****************************************************************************
 494  * input_AddES:
 495  *****************************************************************************
 496  * Reserve a slot in the table of ES descriptors for the ES and add it to the
 497  * list of ES of p_pgrm. If p_pgrm if NULL, then the ES is considered as stand
 498  * alone (PSI ?)
 499  *****************************************************************************/
 500 es_descriptor_t * input_AddES( input_thread_t * p_input,
 501                                pgrm_descriptor_t * p_pgrm, u16 i_es_id,
 502                                size_t i_data_len )
 503 {
 504     es_descriptor_t * p_es;
 505
 506     p_es = (es_descriptor_t *)malloc( sizeof(es_descriptor_t) );
 507     if( p_es == NULL )
 508     {
 509         msg_Err( p_input, "out of memory" );
 510         return( NULL);
 511     }
 512
 513     INSERT_ELEM( p_input->stream.pp_es,
 514                  p_input->stream.i_es_number,
 515                  p_input->stream.i_es_number,
 516                  p_es );
 517
 518     /* Init its values */
 519     p_es->i_id = i_es_id;
 520     p_es->psz_desc[0] = '\0';
 521     p_es->p_pes = NULL;
 522     p_es->p_decoder_fifo = NULL;
 523     p_es->i_cat = UNKNOWN_ES;
 524     p_es->i_demux_fd = 0;
 525     p_es->c_packets = 0;
 526     p_es->c_invalid_packets = 0;
 527     p_es->b_force_decoder = VLC_FALSE;
 528
 529     if( i_data_len )
 530     {
 531         p_es->p_demux_data = malloc( i_data_len );
 532         if( p_es->p_demux_data == NULL )
 533         {
 534             msg_Err( p_input, "out of memory" );
 535             return( NULL );
 536         }
 537         memset( p_es->p_demux_data, 0, i_data_len );
 538     }
 539     else
 540     {
 541         p_es->p_demux_data = NULL;
 542     }
 543     p_es->p_waveformatex     = NULL;
 544     p_es->p_bitmapinfoheader = NULL;
 545
 546     /* Add this ES to the program definition if one is given */
 547     if( p_pgrm )
 548     {
 549         INSERT_ELEM( p_pgrm->pp_es,
 550                      p_pgrm->i_es_number,
 551                      p_pgrm->i_es_number,
 552                      p_es );
 553         p_es->p_pgrm = p_pgrm;
 554     }
 555     else
 556     {
 557         p_es->p_pgrm = NULL;
 558     }
 559
 560     return p_es;
 561 }
 562
 563 /*****************************************************************************
 564  * input_DelES:
 565  *****************************************************************************/
 566 void input_DelES( input_thread_t * p_input, es_descriptor_t * p_es )
 567 {
 568     unsigned int            i_index, i_es_index;
 569     pgrm_descriptor_t *     p_pgrm;
 570
 571     /* Find the ES in the ES table */
 572     for( i_es_index = 0; i_es_index < p_input->stream.i_es_number;
 573          i_es_index++ )
 574     {
 575         if( p_input->stream.pp_es[i_es_index] == p_es )
 576             break;
 577     }
 578
 579     /* If the ES wasn't found, do nothing */
 580     if( i_es_index == p_input->stream.i_es_number )
 581     {
 582         msg_Err( p_input, "ES does not belong to this input" );
 583         return;
 584     }
 585
 586     p_pgrm = p_es->p_pgrm;
 587
 588     /* Kill associated decoder, if any. */
 589     if( p_es->p_decoder_fifo != NULL )
 590     {
 591         input_EndDecoder( p_input, p_es );
 592     }
 593
 594     /* Remove this ES from the description of the program if it is associated to
 595      * one */
 596     if( p_pgrm )
 597     {
 598         for( i_index = 0; i_index < p_pgrm->i_es_number; i_index++ )
 599         {
 600             if( p_pgrm->pp_es[i_index] == p_es )
 601             {
 602                 REMOVE_ELEM( p_pgrm->pp_es,
 603                              p_pgrm->i_es_number,
 604                              i_index );
 605                 break;
 606             }
 607         }
 608     }
 609
 610     /* Free the demux data */
 611     if( p_es->p_demux_data != NULL )
 612     {
 613         free( p_es->p_demux_data );
 614     }
 615     if( p_es->p_waveformatex )
 616     {
 617         free( p_es->p_waveformatex );
 618     }
 619     if( p_es->p_bitmapinfoheader )
 620     {
 621         free( p_es->p_bitmapinfoheader );
 622     }
 623
 624     /* Find the ES in the ES table */
 625     for( i_es_index = 0; i_es_index < p_input->stream.i_es_number;
 626          i_es_index++ )
 627     {
 628         if( p_input->stream.pp_es[i_es_index] == p_es )
 629             break;
 630     }
 631
 632     /* Remove this ES from the stream's list of ES */
 633     REMOVE_ELEM( p_input->stream.pp_es,
 634                  p_input->stream.i_es_number,
 635                  i_es_index );
 636
 637     /* Free the ES */
 638     free( p_es );
 639 }
 640
 641 /*****************************************************************************
 642  * input_SelectES: selects an ES and spawns the associated decoder
 643  *****************************************************************************
 644  * Remember we are still supposed to have stream_lock when entering this
 645  * function ?
 646  *****************************************************************************/
 647 int input_SelectES( input_thread_t * p_input, es_descriptor_t * p_es )
 648 {
 649     if( p_es == NULL )
 650     {
 651         msg_Err( p_input, "nothing to do in input_SelectES" );
 652         return -1;
 653     }
 654
 655     if( ((p_es->i_cat == VIDEO_ES) || (p_es->i_cat == SPU_ES))
 656         && !config_GetInt( p_input, "video" ) )
 657     {
 658         msg_Dbg( p_input,
 659                  "video is disabled, not selecting ES 0x%x", p_es->i_id );
 660         return -1;
 661     }
 662
 663     if( (p_es->i_cat == AUDIO_ES) && !config_GetInt( p_input, "audio" ) )
 664     {
 665         msg_Dbg( p_input,
 666                  "audio is disabled, not selecting ES 0x%x", p_es->i_id );
 667         return -1;
 668     }
 669
 670     msg_Dbg( p_input, "selecting ES 0x%x", p_es->i_id );
 671
 672     if( p_es->p_decoder_fifo != NULL )
 673     {
 674         msg_Err( p_input, "ES 0x%x is already selected", p_es->i_id );
 675         return -1;
 676     }
 677
 678     /* Release the lock, not to block the input thread during
 679      * the creation of the thread. */
 680     vlc_mutex_unlock( &p_input->stream.stream_lock );
 681     p_es->p_decoder_fifo = input_RunDecoder( p_input, p_es );
 682     vlc_mutex_lock( &p_input->stream.stream_lock );
 683
 684     if( p_es->p_decoder_fifo == NULL )
 685     {
 686         return -1;
 687     }
 688
 689     return 0;
 690 }
 691
 692 /*****************************************************************************
 693  * input_UnselectES: removes an ES from the list of selected ES
 694  *****************************************************************************/
 695 int input_UnselectES( input_thread_t * p_input, es_descriptor_t * p_es )
 696 {
 697
 698     unsigned int i_index = 0;
 699
 700     if( p_es == NULL )
 701     {
 702         msg_Err( p_input, "nothing to do in input_UnselectES" );
 703         return -1;
 704     }
 705
 706     msg_Dbg( p_input, "unselecting ES 0x%x", p_es->i_id );
 707
 708     if( p_es->p_decoder_fifo == NULL )
 709     {
 710         msg_Err( p_input, "ES 0x%x is not selected", p_es->i_id );
 711         return( -1 );
 712     }
 713
 714     input_EndDecoder( p_input, p_es );
 715     p_es->p_pes = NULL;
 716
 717     if( ( p_es->p_decoder_fifo == NULL ) &&
 718         ( p_input->stream.i_selected_es_number > 0 ) )
 719     {
 720         while( ( i_index < p_input->stream.i_selected_es_number - 1 ) &&
 721                ( p_input->stream.pp_selected_es[i_index] != p_es ) )
 722         {
 723             i_index++;
 724         }
 725
 726         /* XXX: no need to memmove, we have unsorted data */
 727         REMOVE_ELEM( p_input->stream.pp_selected_es,
 728                      p_input->stream.i_selected_es_number,
 729                      i_index );
 730
 731         if( p_input->stream.i_selected_es_number == 0 )
 732         {
 733             msg_Dbg( p_input, "no more selected ES" );
 734             return 1;
 735         }
 736     }
 737
 738     return 0;
 739 }
 740
 741 /*****************************************************************************
 742  * Navigation callback: a bunch of navigation variables are used as an
 743  *  alternative to the navigation API.
 744  *****************************************************************************/
 745 static int ProgramCallback( vlc_object_t *p_this, char const *psz_cmd,
 746                   vlc_value_t oldval, vlc_value_t newval, void *p_data )
 747 {
 748     input_thread_t *p_input = (input_thread_t *)p_this;
 749
 750     if( oldval.i_int == newval.i_int )
 751        return VLC_SUCCESS;
 752
 753     vlc_mutex_lock( &p_input->stream.stream_lock );
 754     if( ( newval.i_int > 0 ) )
 755     {
 756         vlc_mutex_unlock( &p_input->stream.stream_lock );
 757         input_ChangeProgram( p_input, (uint16_t)newval.i_int );
 758         input_SetStatus( p_input, INPUT_STATUS_PLAY );
 759         vlc_mutex_lock( &p_input->stream.stream_lock );
 760     }
 761     vlc_mutex_unlock( &p_input->stream.stream_lock );
 762
 763     return VLC_SUCCESS;
 764 }
 765
 766 static int TitleCallback( vlc_object_t *p_this, char const *psz_cmd,
 767                   vlc_value_t oldval, vlc_value_t newval, void *p_data )
 768 {
 769     input_thread_t *p_input = (input_thread_t *)p_this;
 770     input_area_t *p_area;
 771
 772     if( oldval.i_int == newval.i_int )
 773        return VLC_SUCCESS;
 774
 775     /* Sanity check should have already be done by var_Set(). */
 776     vlc_mutex_lock( &p_input->stream.stream_lock );
 777     p_area = p_input->stream.pp_areas[newval.i_int];
 778     p_area->i_part = 1;
 779     vlc_mutex_unlock( &p_input->stream.stream_lock );
 780     input_ChangeArea( p_input, p_area );
 781     input_SetStatus( p_input, INPUT_STATUS_PLAY );
 782
 783     return VLC_SUCCESS;
 784 }
 785
 786 static int ChapterCallback( vlc_object_t *p_this, char const *psz_cmd,
 787                   vlc_value_t oldval, vlc_value_t newval, void *p_data )
 788 {
 789     input_thread_t *p_input = (input_thread_t *)p_this;
 790     input_area_t *p_area;
 791
 792     if( oldval.i_int == newval.i_int )
 793        return VLC_SUCCESS;
 794
 795     /* Sanity check will have already be done by var_Set(). */
 796     vlc_mutex_lock( &p_input->stream.stream_lock );
 797     p_area = p_input->stream.p_selected_area;
 798     p_input->stream.p_selected_area->i_part = newval.i_int;
 799     vlc_mutex_unlock( &p_input->stream.stream_lock );
 800
 801     input_ChangeArea( p_input, p_area );
 802     input_SetStatus( p_input, INPUT_STATUS_PLAY );
 803
 804     return VLC_SUCCESS;
 805 }
 806
 807 static int NavigationCallback( vlc_object_t *p_this, char const *psz_cmd,
 808                   vlc_value_t oldval, vlc_value_t newval, void *p_data )
 809 {
 810     input_thread_t *p_input = (input_thread_t *)p_this;
 811     uint16_t i_area_id = (int)p_data;
 812
 813     vlc_mutex_lock( &p_input->stream.stream_lock );
 814
 815     if( p_input->stream.p_selected_area->i_id == i_area_id &&
 816         oldval.i_int == newval.i_int )
 817     {
 818         /* Nothing to do */
 819         vlc_mutex_unlock( &p_input->stream.stream_lock );
 820         return VLC_SUCCESS;
 821     }
 822
 823     if( ( i_area_id < p_input->stream.i_area_nb ) && ( newval.i_int > 0 ) &&
 824         ( (uint16_t)newval.i_int <=
 825           p_input->stream.pp_areas[i_area_id]->i_part_nb ) )
 826     {
 827         input_area_t *p_area = p_input->stream.pp_areas[i_area_id];
 828         p_input->stream.p_selected_area->i_part = newval.i_int;
 829         vlc_mutex_unlock( &p_input->stream.stream_lock );
 830         input_ChangeArea( p_input, p_area );
 831         input_SetStatus( p_input, INPUT_STATUS_PLAY );
 832         vlc_mutex_lock( &p_input->stream.stream_lock );
 833     }
 834     vlc_mutex_unlock( &p_input->stream.stream_lock );
 835
 836     return VLC_SUCCESS;
 837 }