git.sesse.net Git - vlc/blob - src/playlist/engine.c

   1 /*****************************************************************************
   2  * engine.c : Run the playlist and handle its control
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Clément Stenac <zorglub@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24 #include <vlc/vlc.h>
  25 #include <vlc/vout.h>
  26 #include <vlc/sout.h>
  27 #include <vlc/input.h>
  28 #include "vlc_playlist.h"
  29 #include "vlc_interaction.h"
  30 #include "playlist_internal.h"
  31
  32 /*****************************************************************************
  33  * Local prototypes
  34  *****************************************************************************/
  35 static void VariablesInit( playlist_t *p_playlist );
  36
  37 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  38                            vlc_value_t oldval, vlc_value_t newval, void *a )
  39 {
  40     ((playlist_t*)p_this)->b_reset_currently_playing = VLC_TRUE;
  41     playlist_Signal( ((playlist_t*)p_this) );
  42     return VLC_SUCCESS;
  43 }
  44
  45 /**
  46  * Create playlist
  47  *
  48  * Create a playlist structure.
  49  * \param p_parent the vlc object that is to be the parent of this playlist
  50  * \return a pointer to the created playlist, or NULL on error
  51  */
  52 playlist_t * playlist_Create( vlc_object_t *p_parent )
  53 {
  54     playlist_t *p_playlist;
  55     int i_tree;
  56
  57     /* Allocate structure */
  58     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  59     if( !p_playlist )
  60     {
  61         msg_Err( p_parent, "out of memory" );
  62         return NULL;
  63     }
  64     p_parent->p_libvlc->p_playlist = p_playlist;
  65
  66     VariablesInit( p_playlist );
  67
  68     /* Initialise data structures */
  69     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  70     p_playlist->i_last_playlist_id = 0;
  71     p_playlist->i_last_input_id = 0;
  72     p_playlist->p_input = NULL;
  73
  74     p_playlist->gc_date = 0;
  75     p_playlist->b_cant_sleep = VLC_FALSE;
  76
  77     ARRAY_INIT( p_playlist->items );
  78     ARRAY_INIT( p_playlist->all_items );
  79     ARRAY_INIT( p_playlist->input_items );
  80     ARRAY_INIT( p_playlist->current );
  81
  82     p_playlist->i_current_index = 0;
  83     p_playlist->b_reset_currently_playing = VLC_TRUE;
  84     p_playlist->last_rebuild_date = 0;
  85
  86     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  87     p_playlist->b_always_tree = (i_tree == 1);
  88     p_playlist->b_never_tree = (i_tree == 2);
  89
  90     p_playlist->b_doing_ml = VLC_FALSE;
  91
  92     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL);
  93     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL);
  94
  95     /* Create playlist and media library */
  96     p_playlist->p_local_category = playlist_NodeCreate( p_playlist,
  97                                  _( "Playlist" ),p_playlist->p_root_category );
  98     p_playlist->p_local_onelevel =  playlist_NodeCreate( p_playlist,
  99                                 _( "Playlist" ), p_playlist->p_root_onelevel );
 100     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 101     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 102
 103     /* Link the nodes together. Todo: actually create them from the same input*/
 104     p_playlist->p_local_onelevel->p_input->i_id =
 105         p_playlist->p_local_category->p_input->i_id;
 106
 107     if( config_GetInt( p_playlist, "media-library") )
 108     {
 109         p_playlist->p_ml_category =   playlist_NodeCreate( p_playlist,
 110                            _( "Media Library" ), p_playlist->p_root_category );
 111         p_playlist->p_ml_onelevel =  playlist_NodeCreate( p_playlist,
 112                            _( "Media Library" ), p_playlist->p_root_onelevel );
 113         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 114         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 115         p_playlist->p_ml_onelevel->p_input->i_id =
 116              p_playlist->p_ml_category->p_input->i_id;
 117
 118     }
 119     else
 120     {
 121         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 122     }
 123
 124     /* Initial status */
 125     p_playlist->status.p_item = NULL;
 126     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 127     p_playlist->request.b_request = VLC_FALSE;
 128     p_playlist->status.i_status = PLAYLIST_STOPPED;
 129
 130     p_playlist->i_sort = SORT_ID;
 131     p_playlist->i_order = ORDER_NORMAL;
 132
 133     vlc_object_attach( p_playlist, p_parent );
 134
 135     playlist_MLLoad( p_playlist );
 136     return p_playlist;
 137 }
 138
 139 void playlist_Destroy( playlist_t *p_playlist )
 140 {
 141     while( p_playlist->i_sds )
 142     {
 143         playlist_ServicesDiscoveryRemove( p_playlist,
 144                                           p_playlist->pp_sds[0]->psz_module );
 145     }
 146
 147     playlist_MLDump( p_playlist );
 148
 149     vlc_thread_join( p_playlist->p_preparse );
 150     vlc_thread_join( p_playlist->p_secondary_preparse );
 151     vlc_thread_join( p_playlist );
 152
 153     vlc_object_detach( p_playlist->p_preparse );
 154     vlc_object_detach( p_playlist->p_secondary_preparse );
 155
 156     var_Destroy( p_playlist, "intf-change" );
 157     var_Destroy( p_playlist, "item-change" );
 158     var_Destroy( p_playlist, "playlist-current" );
 159     var_Destroy( p_playlist, "intf-popmenu" );
 160     var_Destroy( p_playlist, "intf-show" );
 161     var_Destroy( p_playlist, "play-and-stop" );
 162     var_Destroy( p_playlist, "play-and-exit" );
 163     var_Destroy( p_playlist, "random" );
 164     var_Destroy( p_playlist, "repeat" );
 165     var_Destroy( p_playlist, "loop" );
 166     var_Destroy( p_playlist, "activity" );
 167
 168     PL_LOCK;
 169     /* Go through all items, and simply free everything without caring
 170      * about the tree structure. Do not decref, it will be done by doing
 171      * the same thing on the input items array */
 172     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 173         free( p_del->pp_children );
 174         free( p_del );
 175     FOREACH_END();
 176     ARRAY_RESET( p_playlist->all_items );
 177
 178     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 179         input_ItemClean( p_del );
 180         free( p_del );
 181     FOREACH_END();
 182     ARRAY_RESET( p_playlist->input_items );
 183
 184     ARRAY_RESET( p_playlist->items );
 185     ARRAY_RESET( p_playlist->current );
 186
 187     PL_UNLOCK;
 188
 189     if( p_playlist->p_stats )
 190         free( p_playlist->p_stats );
 191
 192     vlc_mutex_destroy( &p_playlist->gc_lock );
 193     vlc_object_destroy( p_playlist->p_preparse );
 194     vlc_object_destroy( p_playlist->p_secondary_preparse );
 195     vlc_object_detach( p_playlist );
 196     vlc_object_destroy( p_playlist );
 197
 198 }
 199
 200 /* Destroy remaining objects */
 201 static void ObjectGarbageCollector( playlist_t *p_playlist )
 202 {
 203     vlc_object_t *p_obj;
 204
 205     if( mdate() - p_playlist->gc_date < 1000000 )
 206     {
 207         p_playlist->b_cant_sleep = VLC_TRUE;
 208         return;
 209     }
 210     else if( p_playlist->gc_date == 0 )
 211         return;
 212
 213     vlc_mutex_lock( &p_playlist->gc_lock );
 214     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 215                                                   FIND_CHILD ) ) )
 216     {
 217         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 218         {
 219             vlc_object_release( p_obj );
 220             break;
 221         }
 222         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 223         vlc_object_detach( p_obj );
 224         vlc_object_release( p_obj );
 225         vout_Destroy( (vout_thread_t *)p_obj );
 226     }
 227     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 228                                                   FIND_CHILD ) ) )
 229     {
 230         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 231         {
 232             vlc_object_release( p_obj );
 233             break;
 234         }
 235         vlc_object_release( p_obj );
 236         sout_DeleteInstance( (sout_instance_t*)p_obj );
 237     }
 238     p_playlist->b_cant_sleep = VLC_FALSE;
 239     vlc_mutex_unlock( &p_playlist->gc_lock );
 240 }
 241
 242 /** Main loop for the playlist */
 243 void playlist_MainLoop( playlist_t *p_playlist )
 244 {
 245     playlist_item_t *p_item = NULL;
 246     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 247     PL_LOCK;
 248
 249     if( p_playlist->b_reset_currently_playing &&
 250         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 251     {
 252         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
 253                              p_playlist->status.p_item );
 254         p_playlist->last_rebuild_date = mdate();
 255     }
 256
 257 check_input:
 258     /* If there is an input, check that it doesn't need to die. */
 259     if( p_playlist->p_input )
 260     {
 261         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 262         {
 263             PL_DEBUG( "incoming request - stopping current input" );
 264             input_StopThread( p_playlist->p_input );
 265         }
 266
 267         /* This input is dead. Remove it ! */
 268         if( p_playlist->p_input->b_dead )
 269         {
 270             int i_activity;
 271             input_thread_t *p_input;
 272             PL_DEBUG( "dead input" );
 273
 274             p_input = p_playlist->p_input;
 275             p_playlist->p_input = NULL;
 276
 277             /* Release the playlist lock, because we may get stuck
 278              * in input_DestroyThread() for some time. */
 279             PL_UNLOCK
 280
 281             /* Destroy input */
 282             input_DestroyThread( p_input );
 283
 284             /* Unlink current input
 285              * (_after_ input_DestroyThread for vout garbage collector) */
 286             vlc_object_detach( p_input );
 287
 288             /* Destroy object */
 289             vlc_object_destroy( p_input );
 290
 291             PL_LOCK;
 292
 293             p_playlist->gc_date = mdate();
 294             p_playlist->b_cant_sleep = VLC_TRUE;
 295
 296             if( p_playlist->status.p_item->i_flags
 297                 & PLAYLIST_REMOVE_FLAG )
 298             {
 299                  PL_DEBUG( "%s was marked for deletion, deleting",
 300                                  PLI_NAME( p_playlist->status.p_item  ) );
 301                  playlist_ItemDelete( p_playlist->status.p_item );
 302                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 303                      p_playlist->request.p_item = NULL;
 304                  p_playlist->status.p_item = NULL;
 305             }
 306
 307             i_activity= var_GetInteger( p_playlist, "activity") ;
 308             var_SetInteger( p_playlist, "activity", i_activity -
 309                             DEFAULT_INPUT_ACTIVITY );
 310             goto check_input;
 311         }
 312         /* This input is dying, let it do */
 313         else if( p_playlist->p_input->b_die )
 314         {
 315             PL_DEBUG( "dying input" );
 316             msleep( 25000 ); // 25 ms
 317             goto check_input;
 318         }
 319         /* This input has finished, ask it to die ! */
 320         else if( p_playlist->p_input->b_error
 321                   || p_playlist->p_input->b_eof )
 322         {
 323             PL_DEBUG( "finished input" );
 324             input_StopThread( p_playlist->p_input );
 325             /* No need to wait here, we'll wait in the p_input->b_die case */
 326             goto check_input;
 327         }
 328         else if( p_playlist->p_input->i_state != INIT_S )
 329         {
 330             PL_UNLOCK;
 331             ObjectGarbageCollector( p_playlist );
 332             PL_LOCK;
 333         }
 334     }
 335     else
 336     {
 337         /* No input. Several cases
 338          *  - No request, running status -> start new item
 339          *  - No request, stopped status -> collect garbage
 340          *  - Request, running requested -> start new item
 341          *  - Request, stopped requested -> collect garbage
 342          */
 343          if( (!p_playlist->request.b_request &&
 344               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 345               ( p_playlist->request.b_request &&
 346                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 347          {
 348              msg_Dbg( p_playlist, "starting new item" );
 349              p_item = playlist_NextItem( p_playlist );
 350
 351              if( p_item == NULL )
 352              {
 353                 msg_Dbg( p_playlist, "nothing to play" );
 354                 if( b_playexit == VLC_TRUE )
 355                 {
 356                     msg_Info( p_playlist, "end of playlist, exiting" );
 357                     p_playlist->p_libvlc->b_die = VLC_TRUE;
 358                 }
 359                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 360                 PL_UNLOCK
 361                 return;
 362              }
 363              playlist_PlayItem( p_playlist, p_item );
 364          }
 365          else
 366          {
 367             p_playlist->status.i_status = PLAYLIST_STOPPED;
 368             if( p_playlist->status.p_item &&
 369                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 370             {
 371                 PL_DEBUG( "deleting item marked for deletion" );
 372                 playlist_ItemDelete( p_playlist->status.p_item );
 373                 p_playlist->status.p_item = NULL;
 374             }
 375
 376             /* Collect garbage */
 377             PL_UNLOCK;
 378             ObjectGarbageCollector( p_playlist );
 379             PL_LOCK;
 380         }
 381     }
 382     PL_UNLOCK
 383 }
 384
 385 /** Playlist dying last loop */
 386 void playlist_LastLoop( playlist_t *p_playlist )
 387 {
 388     vlc_object_t *p_obj;
 389
 390     /* If there is an input, kill it */
 391     while( 1 )
 392     {
 393         PL_LOCK
 394
 395         if( p_playlist->p_input == NULL )
 396         {
 397             PL_UNLOCK
 398             break;
 399         }
 400
 401         if( p_playlist->p_input->b_dead )
 402         {
 403             input_thread_t *p_input;
 404
 405             /* Unlink current input */
 406             p_input = p_playlist->p_input;
 407             p_playlist->p_input = NULL;
 408             PL_UNLOCK
 409
 410             /* Destroy input */
 411             input_DestroyThread( p_input );
 412             /* Unlink current input (_after_ input_DestroyThread for vout
 413              * garbage collector)*/
 414             vlc_object_detach( p_input );
 415
 416             /* Destroy object */
 417             vlc_object_destroy( p_input );
 418             continue;
 419         }
 420         else if( p_playlist->p_input->b_die )
 421         {
 422             /* This input is dying, leave it alone */
 423             ;
 424         }
 425         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 426         {
 427             input_StopThread( p_playlist->p_input );
 428             PL_UNLOCK
 429             continue;
 430         }
 431         else
 432         {
 433             p_playlist->p_input->b_eof = 1;
 434         }
 435
 436         PL_UNLOCK
 437
 438         msleep( INTF_IDLE_SLEEP );
 439     }
 440
 441     /* close all remaining sout */
 442     while( ( p_obj = vlc_object_find( p_playlist,
 443                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 444     {
 445         vlc_object_release( p_obj );
 446         sout_DeleteInstance( (sout_instance_t*)p_obj );
 447     }
 448
 449     /* close all remaining vout */
 450     while( ( p_obj = vlc_object_find( p_playlist,
 451                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 452     {
 453         vlc_object_detach( p_obj );
 454         vlc_object_release( p_obj );
 455         vout_Destroy( (vout_thread_t *)p_obj );
 456     }
 457 }
 458
 459 /** Main loop for preparser queue */
 460 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 461 {
 462     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 463     input_item_t *p_current;
 464     int i_activity;
 465     uint32_t i_m, i_o;
 466
 467     while( !p_playlist->b_die )
 468     {
 469         vlc_mutex_lock( &p_obj->object_lock );
 470         while( p_obj->i_waiting == 0 )
 471         {
 472             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 473             if( p_playlist->b_die )
 474             {
 475                 vlc_mutex_unlock( &p_obj->object_lock );
 476                 return;
 477             }
 478         }
 479
 480         p_current = p_obj->pp_waiting[0];
 481         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 482         vlc_mutex_unlock( &p_obj->object_lock );
 483
 484         PL_LOCK;
 485         if( p_current )
 486         {
 487             vlc_bool_t b_preparsed = VLC_FALSE;
 488             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
 489                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
 490                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
 491                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
 492                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
 493                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
 494                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
 495                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
 496             {
 497                 b_preparsed = VLC_TRUE;
 498                 stats_TimerStart( p_playlist, "Preparse run",
 499                                   STATS_TIMER_PREPARSE );
 500                 PL_UNLOCK;
 501                 input_Preparse( p_playlist, p_current );
 502                 PL_LOCK;
 503                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 504             }
 505             PL_UNLOCK;
 506             if( b_preparsed )
 507             {
 508                 p_current->p_meta->i_status |= ITEM_PREPARSED;
 509                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 510             }
 511             PL_LOCK;
 512
 513             /* If we haven't retrieved enough meta, add to secondary queue
 514              * which will run the "meta fetchers"
 515              * TODO:
 516              *  don't do this for things we won't get meta for, like
 517              *  videos
 518              */
 519             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o,
 520                                       VLC_TRUE ) )
 521             {
 522                 preparse_item_t p;
 523                 p.p_item = p_current;
 524                 p.b_fetch_art = VLC_FALSE;
 525                 vlc_mutex_lock( &p_playlist->p_secondary_preparse->object_lock);
 526                 INSERT_ELEM( p_playlist->p_secondary_preparse->p_waiting,
 527                              p_playlist->p_secondary_preparse->i_waiting,
 528                              p_playlist->p_secondary_preparse->i_waiting,
 529                              p );
 530                 vlc_mutex_unlock(
 531                             &p_playlist->p_secondary_preparse->object_lock);
 532                 vlc_cond_signal(
 533                             &p_playlist->p_secondary_preparse->object_wait );
 534             }
 535             else
 536                 vlc_gc_decref( p_current );
 537             PL_UNLOCK;
 538         }
 539         else
 540             PL_UNLOCK;
 541
 542         vlc_mutex_lock( &p_obj->object_lock );
 543         i_activity = var_GetInteger( p_playlist, "activity" );
 544         if( i_activity < 0 ) i_activity = 0;
 545         vlc_mutex_unlock( &p_obj->object_lock );
 546         /* Sleep at least 1ms */
 547         msleep( (i_activity+1) * 1000 );
 548     }
 549 }
 550
 551 /** Main loop for secondary preparser queue */
 552 void playlist_SecondaryPreparseLoop( playlist_secondary_preparse_t *p_obj )
 553 {
 554     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 555     vlc_bool_t b_fetch_art;
 556     input_item_t *p_item;
 557     int i_activity;
 558
 559     while( !p_playlist->b_die )
 560     {
 561         vlc_mutex_lock( &p_obj->object_lock );
 562         while( p_obj->i_waiting == 0 )
 563         {
 564             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 565             if( p_playlist->b_die )
 566             {
 567                 vlc_mutex_unlock( &p_obj->object_lock );
 568                 return;
 569             }
 570         }
 571
 572         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 573         p_item = p_obj->p_waiting->p_item;
 574         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 575         vlc_mutex_unlock( &p_obj->object_lock );
 576         if( p_item )
 577         {
 578             if( !b_fetch_art )
 579             {
 580                 input_MetaFetch( p_playlist, p_item );
 581                 p_item->p_meta->i_status |= ITEM_META_FETCHED;
 582                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 583                 /*  Fetch right now */
 584                 if( var_GetInteger( p_playlist, "album-art" ) == ALBUM_ART_ALL )
 585                 {
 586                     vlc_mutex_lock( &p_obj->object_lock );
 587                     preparse_item_t p;
 588                     p.p_item = p_item;
 589                     p.b_fetch_art = VLC_TRUE;
 590                     INSERT_ELEM( p_playlist->p_secondary_preparse->p_waiting,
 591                                  p_playlist->p_secondary_preparse->i_waiting,
 592                                  0, p );
 593                     vlc_mutex_unlock( &p_obj->object_lock );
 594                 }
 595                 else
 596                     vlc_gc_decref( p_item );
 597             }
 598             else
 599             {
 600                 input_ArtFetch( p_playlist, p_item );
 601                 p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 602                 vlc_gc_decref( p_item );
 603            }
 604         }
 605         vlc_mutex_lock( &p_obj->object_lock );
 606         i_activity = var_GetInteger( p_playlist, "activity" );
 607         if( i_activity < 0 ) i_activity = 0;
 608         vlc_mutex_unlock( &p_obj->object_lock );
 609         /* Sleep at least 1ms */
 610         msleep( (i_activity+1) * 1000 );
 611     }
 612 }
 613
 614 static void VariablesInit( playlist_t *p_playlist )
 615 {
 616     vlc_value_t val;
 617     /* These variables control updates */
 618     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 619     val.b_bool = VLC_TRUE;
 620     var_Set( p_playlist, "intf-change", val );
 621
 622     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 623     val.i_int = -1;
 624     var_Set( p_playlist, "item-change", val );
 625
 626     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 627     val.i_int = -1;
 628     var_Set( p_playlist, "item-deleted", val );
 629
 630     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 631
 632     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 633     val.i_int = -1;
 634     var_Set( p_playlist, "playlist-current", val );
 635
 636     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 637
 638     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 639     val.b_bool = VLC_TRUE;
 640     var_Set( p_playlist, "intf-show", val );
 641
 642     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 643     var_SetInteger( p_playlist, "activity", 0 );
 644
 645     /* Variables to control playback */
 646     var_CreateGetBool( p_playlist, "play-and-stop" );
 647     var_CreateGetBool( p_playlist, "play-and-exit" );
 648     var_CreateGetBool( p_playlist, "random" );
 649     var_CreateGetBool( p_playlist, "repeat" );
 650     var_CreateGetBool( p_playlist, "loop" );
 651
 652     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 653 }