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) 1999-2007 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
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc_vout.h>
  31 #include <vlc_sout.h>
  32 #include <vlc_playlist.h>
  33 #include <vlc_interface.h>
  34 #include "playlist_internal.h"
  35 #include "stream_output/stream_output.h" /* sout_DeleteInstance */
  36
  37 /*****************************************************************************
  38  * Local prototypes
  39  *****************************************************************************/
  40 static void VariablesInit( playlist_t *p_playlist );
  41
  42 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  43                            vlc_value_t oldval, vlc_value_t newval, void *a )
  44 {
  45     (void)psz_cmd; (void)oldval; (void)newval; (void)a;
  46
  47     ((playlist_t*)p_this)->b_reset_currently_playing = true;
  48     playlist_Signal( ((playlist_t*)p_this) );
  49     return VLC_SUCCESS;
  50 }
  51
  52 /**
  53  * Create playlist
  54  *
  55  * Create a playlist structure.
  56  * \param p_parent the vlc object that is to be the parent of this playlist
  57  * \return a pointer to the created playlist, or NULL on error
  58  */
  59 playlist_t * playlist_Create( vlc_object_t *p_parent )
  60 {
  61     static const char playlist_name[] = "playlist";
  62     playlist_t *p_playlist;
  63     bool b_save;
  64
  65     /* Allocate structure */
  66     p_playlist = vlc_custom_create( p_parent, sizeof( *p_playlist ),
  67                                     VLC_OBJECT_PLAYLIST, playlist_name );
  68     if( !p_playlist )
  69     {
  70         msg_Err( p_parent, "out of memory" );
  71         return NULL;
  72     }
  73
  74     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
  75
  76     libvlc_priv(p_parent->p_libvlc)->p_playlist = p_playlist;
  77
  78     VariablesInit( p_playlist );
  79
  80     /* Initialise data structures */
  81     vlc_mutex_init( &p_playlist->gc_lock );
  82     p_playlist->i_last_playlist_id = 0;
  83     p_playlist->p_input = NULL;
  84
  85     p_playlist->gc_date = 0;
  86     p_playlist->b_cant_sleep = false;
  87
  88     ARRAY_INIT( p_playlist->items );
  89     ARRAY_INIT( p_playlist->all_items );
  90     ARRAY_INIT( p_playlist->current );
  91
  92     p_playlist->i_current_index = 0;
  93     p_playlist->b_reset_currently_playing = true;
  94     p_playlist->last_rebuild_date = 0;
  95
  96     p_playlist->b_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  97
  98     p_playlist->b_doing_ml = false;
  99
 100     p_playlist->b_auto_preparse =
 101                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
 102
 103     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 104                                     0, NULL );
 105     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 106                                     0, p_playlist->p_root_category->p_input );
 107
 108     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 109         return NULL;
 110
 111     /* Create playlist and media library */
 112     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 113                             &p_playlist->p_local_category,
 114                             &p_playlist->p_local_onelevel, false );
 115
 116     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 117     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 118
 119     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 120         !p_playlist->p_local_category->p_input ||
 121         !p_playlist->p_local_onelevel->p_input )
 122         return NULL;
 123
 124     if( config_GetInt( p_playlist, "media-library") )
 125     {
 126         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 127                             &p_playlist->p_ml_category,
 128                             &p_playlist->p_ml_onelevel, false );
 129
 130         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 131             return NULL;
 132
 133         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 134         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 135     }
 136     else
 137     {
 138         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 139     }
 140
 141     /* Initial status */
 142     p_playlist->status.p_item = NULL;
 143     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 144     p_playlist->request.b_request = false;
 145     p_playlist->status.i_status = PLAYLIST_STOPPED;
 146
 147     p_playlist->i_sort = SORT_ID;
 148     p_playlist->i_order = ORDER_NORMAL;
 149
 150
 151     b_save = p_playlist->b_auto_preparse;
 152     p_playlist->b_auto_preparse = false;
 153     playlist_MLLoad( p_playlist );
 154     p_playlist->b_auto_preparse = true;
 155
 156     return p_playlist;
 157 }
 158
 159 /**
 160  * Destroy playlist
 161  *
 162  * Destroy a playlist structure.
 163  * \param p_playlist the playlist object
 164  * \return nothing
 165  */
 166 void playlist_Destroy( playlist_t *p_playlist )
 167 {
 168     var_Destroy( p_playlist, "intf-change" );
 169     var_Destroy( p_playlist, "item-change" );
 170     var_Destroy( p_playlist, "playlist-current" );
 171     var_Destroy( p_playlist, "intf-popupmenu" );
 172     var_Destroy( p_playlist, "intf-show" );
 173     var_Destroy( p_playlist, "play-and-stop" );
 174     var_Destroy( p_playlist, "play-and-exit" );
 175     var_Destroy( p_playlist, "random" );
 176     var_Destroy( p_playlist, "repeat" );
 177     var_Destroy( p_playlist, "loop" );
 178     var_Destroy( p_playlist, "activity" );
 179
 180     if( p_playlist->p_preparse )
 181         vlc_object_release( p_playlist->p_preparse );
 182     if( p_playlist->p_fetcher )
 183         vlc_object_release( p_playlist->p_fetcher );
 184
 185     vlc_object_release( p_playlist );
 186 }
 187
 188 /* Destroy remaining objects */
 189 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
 190 {
 191     vlc_object_t *p_obj;
 192
 193     if( !b_force )
 194     {
 195         if( mdate() - p_playlist->gc_date < 1000000 )
 196         {
 197             p_playlist->b_cant_sleep = true;
 198             return;
 199         }
 200         else if( p_playlist->gc_date == 0 )
 201             return;
 202     }
 203
 204     vlc_mutex_lock( &p_playlist->gc_lock );
 205     while( ( p_obj = vlc_object_find( p_playlist->p_libvlc, VLC_OBJECT_VOUT,
 206                                                   FIND_CHILD ) ) )
 207     {
 208         if( p_obj->p_parent != VLC_OBJECT(p_playlist->p_libvlc) )
 209         {
 210             vlc_object_release( p_obj );
 211             break;
 212         }
 213         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 214         vlc_object_detach( p_obj );
 215         vlc_object_release( p_obj );
 216         vout_Destroy( (vout_thread_t *)p_obj );
 217     }
 218 #ifdef ENABLE_SOUT
 219     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 220                                                   FIND_CHILD ) ) )
 221     {
 222         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 223         {
 224             vlc_object_release( p_obj );
 225             break;
 226         }
 227         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 228         vlc_object_detach( p_obj );
 229         vlc_object_release( p_obj );
 230         sout_DeleteInstance( (sout_instance_t*)p_obj );
 231     }
 232 #endif
 233     p_playlist->b_cant_sleep = false;
 234     vlc_mutex_unlock( &p_playlist->gc_lock );
 235 }
 236
 237 /**
 238  * Main loop
 239  *
 240  * Main loop for the playlist
 241  * \param p_playlist the playlist object
 242  * \return nothing
 243  */
 244 void playlist_MainLoop( playlist_t *p_playlist )
 245 {
 246     playlist_item_t *p_item = NULL;
 247     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 248     PL_LOCK;
 249
 250     if( p_playlist->b_reset_currently_playing &&
 251         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 252     {
 253         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 254                              p_playlist->status.p_item );
 255         p_playlist->last_rebuild_date = mdate();
 256     }
 257
 258 check_input:
 259     /* If there is an input, check that it doesn't need to die. */
 260     if( p_playlist->p_input )
 261     {
 262         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 263         {
 264             PL_DEBUG( "incoming request - stopping current input" );
 265             input_StopThread( p_playlist->p_input );
 266         }
 267
 268         /* This input is dead. Remove it ! */
 269         if( p_playlist->p_input->b_dead )
 270         {
 271             int i_activity;
 272             input_thread_t *p_input;
 273             PL_DEBUG( "dead input" );
 274
 275             p_input = p_playlist->p_input;
 276             p_playlist->p_input = NULL;
 277
 278             /* Release the playlist lock, because we may get stuck
 279              * in vlc_object_release() for some time. */
 280             PL_UNLOCK;
 281
 282             /* Destroy input */
 283             vlc_object_release( p_input );
 284
 285             PL_LOCK;
 286
 287             p_playlist->gc_date = mdate();
 288             p_playlist->b_cant_sleep = true;
 289
 290             if( p_playlist->status.p_item->i_flags
 291                 & PLAYLIST_REMOVE_FLAG )
 292             {
 293                  PL_DEBUG( "%s was marked for deletion, deleting",
 294                                  PLI_NAME( p_playlist->status.p_item  ) );
 295                  playlist_ItemDelete( p_playlist->status.p_item );
 296                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 297                      p_playlist->request.p_item = NULL;
 298                  p_playlist->status.p_item = NULL;
 299             }
 300
 301             i_activity= var_GetInteger( p_playlist, "activity" );
 302             var_SetInteger( p_playlist, "activity", i_activity -
 303                             DEFAULT_INPUT_ACTIVITY );
 304             goto check_input;
 305         }
 306         /* This input is dying, let it do */
 307         else if( p_playlist->p_input->b_die )
 308         {
 309             PL_DEBUG( "dying input" );
 310             PL_UNLOCK;
 311             msleep( INTF_IDLE_SLEEP );
 312             PL_LOCK;
 313             goto check_input;
 314         }
 315         /* This input has finished, ask it to die ! */
 316         else if( p_playlist->p_input->b_error
 317                   || p_playlist->p_input->b_eof )
 318         {
 319             PL_DEBUG( "finished input" );
 320             input_StopThread( p_playlist->p_input );
 321             /* No need to wait here, we'll wait in the p_input->b_die case */
 322             goto check_input;
 323         }
 324         else if( p_playlist->p_input->i_state != INIT_S )
 325         {
 326             PL_UNLOCK;
 327             ObjectGarbageCollector( p_playlist, false );
 328             PL_LOCK;
 329         }
 330     }
 331     else
 332     {
 333         /* No input. Several cases
 334          *  - No request, running status -> start new item
 335          *  - No request, stopped status -> collect garbage
 336          *  - Request, running requested -> start new item
 337          *  - Request, stopped requested -> collect garbage
 338         */
 339         int i_status = p_playlist->request.b_request ?
 340             p_playlist->request.i_status : p_playlist->status.i_status;
 341         if( i_status != PLAYLIST_STOPPED )
 342         {
 343             msg_Dbg( p_playlist, "starting new item" );
 344             p_item = playlist_NextItem( p_playlist );
 345
 346             if( p_item == NULL )
 347             {
 348                 msg_Dbg( p_playlist, "nothing to play" );
 349                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 350                 PL_UNLOCK;
 351
 352                 if( b_playexit == true )
 353                 {
 354                     msg_Info( p_playlist, "end of playlist, exiting" );
 355                     vlc_object_kill( p_playlist->p_libvlc );
 356                 }
 357                 ObjectGarbageCollector( p_playlist, true );
 358                 return;
 359              }
 360              playlist_PlayItem( p_playlist, p_item );
 361          }
 362          else
 363          {
 364             const bool b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 365
 366             p_playlist->status.i_status = PLAYLIST_STOPPED;
 367             if( p_playlist->status.p_item &&
 368                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 369             {
 370                 PL_DEBUG( "deleting item marked for deletion" );
 371                 playlist_ItemDelete( p_playlist->status.p_item );
 372                 p_playlist->status.p_item = NULL;
 373             }
 374
 375             /* Collect garbage */
 376             PL_UNLOCK;
 377             ObjectGarbageCollector( p_playlist, b_gc_forced );
 378             PL_LOCK;
 379         }
 380     }
 381     PL_UNLOCK;
 382 }
 383
 384 /**
 385  * Last loop
 386  *
 387  * The playlist is dying so do the last loop
 388  * \param p_playlist the playlist object
 389  * \return nothing
 390 */
 391 void playlist_LastLoop( playlist_t *p_playlist )
 392 {
 393     vlc_object_t *p_obj;
 394
 395     /* If there is an input, kill it */
 396     while( 1 )
 397     {
 398         PL_LOCK;
 399         if( p_playlist->p_input == NULL )
 400         {
 401             PL_UNLOCK;
 402             break;
 403         }
 404
 405         if( p_playlist->p_input->b_dead )
 406         {
 407             input_thread_t *p_input;
 408
 409             /* Unlink current input */
 410             p_input = p_playlist->p_input;
 411             p_playlist->p_input = NULL;
 412             PL_UNLOCK;
 413
 414             /* Destroy input */
 415             vlc_object_release( p_input );
 416             continue;
 417         }
 418         else if( p_playlist->p_input->b_die )
 419         {
 420             /* This input is dying, leave it alone */
 421             ;
 422         }
 423         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 424         {
 425             input_StopThread( p_playlist->p_input );
 426             PL_UNLOCK;
 427             continue;
 428         }
 429         else
 430         {
 431             p_playlist->p_input->b_eof = 1;
 432         }
 433         PL_UNLOCK;
 434
 435         msleep( INTF_IDLE_SLEEP );
 436     }
 437
 438 #ifdef ENABLE_SOUT
 439     /* close all remaining sout */
 440     while( ( p_obj = vlc_object_find( p_playlist,
 441                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 442     {
 443         vlc_object_detach( p_obj );
 444         vlc_object_release( p_obj );
 445         sout_DeleteInstance( (sout_instance_t*)p_obj );
 446     }
 447 #endif
 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     while( p_playlist->i_sds )
 459     {
 460         playlist_ServicesDiscoveryRemove( p_playlist,
 461                                           p_playlist->pp_sds[0]->p_sd->psz_module );
 462     }
 463
 464     playlist_MLDump( p_playlist );
 465
 466     PL_LOCK;
 467     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 468         free( p_del->pp_children );
 469         vlc_gc_decref( p_del->p_input );
 470         free( p_del );
 471     FOREACH_END();
 472     ARRAY_RESET( p_playlist->all_items );
 473
 474     ARRAY_RESET( p_playlist->items );
 475     ARRAY_RESET( p_playlist->current );
 476
 477     PL_UNLOCK;
 478 }
 479
 480 /**
 481  * Preparse loop
 482  *
 483  * Main loop for preparser queue
 484  * \param p_obj items to preparse
 485  * \return nothing
 486  */
 487 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 488 {
 489     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 490     input_item_t *p_current;
 491     int i_activity;
 492
 493     while( !p_playlist->b_die )
 494     {
 495         vlc_object_lock( p_obj );
 496         while( p_obj->i_waiting == 0 )
 497         {
 498             if( vlc_object_wait( p_obj ) || p_playlist->b_die )
 499             {
 500                 vlc_object_unlock( p_obj );
 501                 return;
 502             }
 503         }
 504
 505         p_current = p_obj->pp_waiting[0];
 506         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 507         vlc_object_unlock( p_obj );
 508
 509         PL_LOCK;
 510         if( p_current )
 511         {
 512             if( p_current->i_type == ITEM_TYPE_FILE )
 513             {
 514                 stats_TimerStart( p_playlist, "Preparse run",
 515                                   STATS_TIMER_PREPARSE );
 516                 /* Do not preparse if it is already done (like by playing it) */
 517                 if( !input_item_IsPreparsed( p_current ) )
 518                 {
 519                     PL_UNLOCK;
 520                     input_Preparse( p_playlist, p_current );
 521                     PL_LOCK;
 522                 }
 523                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 524                 PL_UNLOCK;
 525                 input_item_SetPreparsed( p_current, true );
 526                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 527                 PL_LOCK;
 528             }
 529             /* If we haven't retrieved enough meta, add to secondary queue
 530              * which will run the "meta fetchers".
 531              * This only checks for meta, not for art
 532              * \todo don't do this for things we won't get meta for, like vids
 533              */
 534             char *psz_arturl = input_item_GetArtURL( p_current );
 535             char *psz_name = input_item_GetName( p_current );
 536             if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 537                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 538             {
 539                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 540                 vlc_object_lock( p_playlist->p_fetcher );
 541                 INSERT_ELEM( p_playlist->p_fetcher->pp_waiting,
 542                              p_playlist->p_fetcher->i_waiting,
 543                              p_playlist->p_fetcher->i_waiting, p_current);
 544                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 545                 vlc_object_unlock( p_playlist->p_fetcher );
 546             }
 547             else
 548             {
 549                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 550                           psz_name, psz_arturl );
 551                 vlc_gc_decref( p_current );
 552             }
 553             free( psz_name );
 554             free( psz_arturl );
 555             PL_UNLOCK;
 556         }
 557         else
 558             PL_UNLOCK;
 559
 560         vlc_object_lock( p_obj );
 561         i_activity = var_GetInteger( p_playlist, "activity" );
 562         if( i_activity < 0 ) i_activity = 0;
 563         vlc_object_unlock( p_obj );
 564         /* Sleep at least 1ms */
 565         msleep( (i_activity+1) * 1000 );
 566     }
 567 }
 568
 569 /**
 570  * Fetcher loop
 571  *
 572  * Main loop for secondary preparser queue
 573  * \param p_obj items to preparse
 574  * \return nothing
 575  */
 576 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 577 {
 578     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 579     input_item_t *p_item;
 580     int i_activity;
 581
 582     while( !p_playlist->b_die )
 583     {
 584         vlc_mutex_lock( &p_obj->object_lock );
 585         while( p_obj->i_waiting == 0 )
 586         {
 587             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 588             if( p_playlist->b_die )
 589             {
 590                 vlc_mutex_unlock( &p_obj->object_lock );
 591                 return;
 592             }
 593         }
 594
 595         p_item = p_obj->pp_waiting[0];
 596         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 597         vlc_mutex_unlock( &p_obj->object_lock );
 598         if( p_item )
 599         {
 600             int i_ret;
 601
 602             /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 603              * (This can happen if we fetch art on play)
 604              * FIXME this doesn't work if we need to fetch meta before art ... */
 605             for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 606             {
 607                 bool b_break;
 608                 PL_LOCK;
 609                 b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 610                             p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 611                 PL_UNLOCK;
 612                 if( b_break )
 613                     break;
 614                 msleep( 50000 );
 615             }
 616
 617             i_ret = input_ArtFind( p_playlist, p_item );
 618             if( i_ret == 1 )
 619             {
 620                 PL_DEBUG( "downloading art for %s", p_item->psz_name );
 621                 if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 622                     input_item_SetArtNotFound( p_item, true );
 623                 else {
 624                     input_item_SetArtFetched( p_item, true );
 625                     var_SetInteger( p_playlist, "item-change",
 626                                     p_item->i_id );
 627                 }
 628             }
 629             else if( i_ret == 0 ) /* Was in cache */
 630             {
 631                 PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 632                 input_item_SetArtFetched( p_item, true );
 633                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 634             }
 635             else
 636             {
 637                 PL_DEBUG( "art not found for %s", p_item->psz_name );
 638                 input_item_SetArtNotFound( p_item, true );
 639             }
 640             vlc_gc_decref( p_item );
 641         }
 642         vlc_object_lock( p_obj );
 643         i_activity = var_GetInteger( p_playlist, "activity" );
 644         if( i_activity < 0 ) i_activity = 0;
 645         vlc_object_unlock( p_obj );
 646         /* Sleep at least 1ms */
 647         msleep( (i_activity+1) * 1000 );
 648     }
 649 }
 650
 651 static void VariablesInit( playlist_t *p_playlist )
 652 {
 653     vlc_value_t val;
 654     /* These variables control updates */
 655     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 656     val.b_bool = true;
 657     var_Set( p_playlist, "intf-change", val );
 658
 659     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 660     val.i_int = -1;
 661     var_Set( p_playlist, "item-change", val );
 662
 663     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 664     val.i_int = -1;
 665     var_Set( p_playlist, "item-deleted", val );
 666
 667     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 668
 669     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 670     val.i_int = -1;
 671     var_Set( p_playlist, "playlist-current", val );
 672
 673     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 674
 675     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 676     val.b_bool = true;
 677     var_Set( p_playlist, "intf-show", val );
 678
 679     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 680     var_SetInteger( p_playlist, "activity", 0 );
 681
 682     /* Variables to control playback */
 683     var_CreateGetBool( p_playlist, "play-and-stop" );
 684     var_CreateGetBool( p_playlist, "play-and-exit" );
 685     var_CreateGetBool( p_playlist, "random" );
 686     var_CreateGetBool( p_playlist, "repeat" );
 687     var_CreateGetBool( p_playlist, "loop" );
 688
 689     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 690 }