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 static void playlist_Destructor( vlc_object_t * p_this );
  42
  43 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  44                            vlc_value_t oldval, vlc_value_t newval, void *a )
  45 {
  46     (void)psz_cmd; (void)oldval; (void)newval; (void)a;
  47
  48     ((playlist_t*)p_this)->b_reset_currently_playing = true;
  49     playlist_Signal( ((playlist_t*)p_this) );
  50     return VLC_SUCCESS;
  51 }
  52
  53 /**
  54  * Create playlist
  55  *
  56  * Create a playlist structure.
  57  * \param p_parent the vlc object that is to be the parent of this playlist
  58  * \return a pointer to the created playlist, or NULL on error
  59  */
  60 playlist_t * playlist_Create( vlc_object_t *p_parent )
  61 {
  62     static const char playlist_name[] = "playlist";
  63     playlist_t *p_playlist;
  64     bool b_save;
  65
  66     /* Allocate structure */
  67     p_playlist = vlc_custom_create( p_parent, sizeof( *p_playlist ),
  68                                     VLC_OBJECT_PLAYLIST, playlist_name );
  69     if( !p_playlist )
  70     {
  71         msg_Err( p_parent, "out of memory" );
  72         return NULL;
  73     }
  74
  75     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
  76
  77     p_parent->p_libvlc->p_playlist = p_playlist;
  78
  79     VariablesInit( p_playlist );
  80
  81     /* Initialise data structures */
  82     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  83     p_playlist->i_last_playlist_id = 0;
  84     p_playlist->p_input = NULL;
  85
  86     p_playlist->gc_date = 0;
  87     p_playlist->b_cant_sleep = false;
  88
  89     ARRAY_INIT( p_playlist->items );
  90     ARRAY_INIT( p_playlist->all_items );
  91     ARRAY_INIT( p_playlist->current );
  92
  93     p_playlist->i_current_index = 0;
  94     p_playlist->b_reset_currently_playing = true;
  95     p_playlist->last_rebuild_date = 0;
  96
  97     p_playlist->b_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  98
  99     p_playlist->b_doing_ml = false;
 100
 101     p_playlist->b_auto_preparse =
 102                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
 103
 104     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 105                                     0, NULL );
 106     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 107                                     0, p_playlist->p_root_category->p_input );
 108
 109     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 110         return NULL;
 111
 112     /* Create playlist and media library */
 113     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 114                             &p_playlist->p_local_category,
 115                             &p_playlist->p_local_onelevel, false );
 116
 117     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 118     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 119
 120     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 121         !p_playlist->p_local_category->p_input ||
 122         !p_playlist->p_local_onelevel->p_input )
 123         return NULL;
 124
 125     if( config_GetInt( p_playlist, "media-library") )
 126     {
 127         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 128                             &p_playlist->p_ml_category,
 129                             &p_playlist->p_ml_onelevel, false );
 130
 131         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 132             return NULL;
 133
 134         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 135         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 136     }
 137     else
 138     {
 139         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 140     }
 141
 142     /* Initial status */
 143     p_playlist->status.p_item = NULL;
 144     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 145     p_playlist->request.b_request = false;
 146     p_playlist->status.i_status = PLAYLIST_STOPPED;
 147
 148     p_playlist->i_sort = SORT_ID;
 149     p_playlist->i_order = ORDER_NORMAL;
 150
 151
 152     b_save = p_playlist->b_auto_preparse;
 153     p_playlist->b_auto_preparse = false;
 154     playlist_MLLoad( p_playlist );
 155     p_playlist->b_auto_preparse = true;
 156
 157     vlc_object_set_destructor( p_playlist, playlist_Destructor );
 158
 159     return p_playlist;
 160 }
 161
 162 /**
 163  * Destroy playlist
 164  *
 165  * Destroy a playlist structure.
 166  * \param p_playlist the playlist object
 167  * \return nothing
 168  */
 169 void playlist_Destroy( playlist_t *p_playlist )
 170 {
 171     /* XXX: should go in the playlist destructor */
 172     var_Destroy( p_playlist, "intf-change" );
 173     var_Destroy( p_playlist, "item-change" );
 174     var_Destroy( p_playlist, "playlist-current" );
 175     var_Destroy( p_playlist, "intf-popupmenu" );
 176     var_Destroy( p_playlist, "intf-show" );
 177     var_Destroy( p_playlist, "play-and-stop" );
 178     var_Destroy( p_playlist, "play-and-exit" );
 179     var_Destroy( p_playlist, "random" );
 180     var_Destroy( p_playlist, "repeat" );
 181     var_Destroy( p_playlist, "loop" );
 182     var_Destroy( p_playlist, "activity" );
 183
 184     vlc_object_release( p_playlist );
 185 }
 186
 187 static void playlist_Destructor( vlc_object_t * p_this )
 188 {
 189     playlist_t * p_playlist = (playlist_t *)p_this;
 190
 191     // Kill preparser
 192     if( p_playlist->p_preparse )
 193     {
 194         vlc_object_release( p_playlist->p_preparse );
 195     }
 196
 197     // Kill meta fetcher
 198     if( p_playlist->p_fetcher )
 199     {
 200         vlc_object_release( p_playlist->p_fetcher );
 201     }
 202 }
 203
 204 /* Destroy remaining objects */
 205 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
 206 {
 207     vlc_object_t *p_obj;
 208
 209     if( !b_force )
 210     {
 211         if( mdate() - p_playlist->gc_date < 1000000 )
 212         {
 213             p_playlist->b_cant_sleep = true;
 214             return;
 215         }
 216         else if( p_playlist->gc_date == 0 )
 217             return;
 218     }
 219
 220     vlc_mutex_lock( &p_playlist->gc_lock );
 221     while( ( p_obj = vlc_object_find( p_playlist->p_libvlc, VLC_OBJECT_VOUT,
 222                                                   FIND_CHILD ) ) )
 223     {
 224         if( p_obj->p_parent != VLC_OBJECT(p_playlist->p_libvlc) )
 225         {
 226             vlc_object_release( p_obj );
 227             break;
 228         }
 229         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 230         vlc_object_detach( p_obj );
 231         vlc_object_release( p_obj );
 232         vout_Destroy( (vout_thread_t *)p_obj );
 233     }
 234     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 235                                                   FIND_CHILD ) ) )
 236     {
 237         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 238         {
 239             vlc_object_release( p_obj );
 240             break;
 241         }
 242         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 243         vlc_object_detach( p_obj );
 244         vlc_object_release( p_obj );
 245         sout_DeleteInstance( (sout_instance_t*)p_obj );
 246     }
 247     p_playlist->b_cant_sleep = false;
 248     vlc_mutex_unlock( &p_playlist->gc_lock );
 249 }
 250
 251 /**
 252  * Main loop
 253  *
 254  * Main loop for the playlist
 255  * \param p_playlist the playlist object
 256  * \return nothing
 257  */
 258 void playlist_MainLoop( playlist_t *p_playlist )
 259 {
 260     playlist_item_t *p_item = NULL;
 261     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 262     PL_LOCK;
 263
 264     if( p_playlist->b_reset_currently_playing &&
 265         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 266     {
 267         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 268                              p_playlist->status.p_item );
 269         p_playlist->last_rebuild_date = mdate();
 270     }
 271
 272 check_input:
 273     /* If there is an input, check that it doesn't need to die. */
 274     if( p_playlist->p_input )
 275     {
 276         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 277         {
 278             PL_DEBUG( "incoming request - stopping current input" );
 279             input_StopThread( p_playlist->p_input );
 280         }
 281
 282         /* This input is dead. Remove it ! */
 283         if( p_playlist->p_input->b_dead )
 284         {
 285             int i_activity;
 286             input_thread_t *p_input;
 287             PL_DEBUG( "dead input" );
 288
 289             p_input = p_playlist->p_input;
 290             p_playlist->p_input = NULL;
 291
 292             /* Release the playlist lock, because we may get stuck
 293              * in vlc_object_release() for some time. */
 294             PL_UNLOCK;
 295
 296             /* Destroy input */
 297             vlc_object_release( p_input );
 298
 299             PL_LOCK;
 300
 301             p_playlist->gc_date = mdate();
 302             p_playlist->b_cant_sleep = true;
 303
 304             if( p_playlist->status.p_item->i_flags
 305                 & PLAYLIST_REMOVE_FLAG )
 306             {
 307                  PL_DEBUG( "%s was marked for deletion, deleting",
 308                                  PLI_NAME( p_playlist->status.p_item  ) );
 309                  playlist_ItemDelete( p_playlist->status.p_item );
 310                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 311                      p_playlist->request.p_item = NULL;
 312                  p_playlist->status.p_item = NULL;
 313             }
 314
 315             i_activity= var_GetInteger( p_playlist, "activity" );
 316             var_SetInteger( p_playlist, "activity", i_activity -
 317                             DEFAULT_INPUT_ACTIVITY );
 318             goto check_input;
 319         }
 320         /* This input is dying, let it do */
 321         else if( p_playlist->p_input->b_die )
 322         {
 323             PL_DEBUG( "dying input" );
 324             PL_UNLOCK;
 325             msleep( INTF_IDLE_SLEEP );
 326             PL_LOCK;
 327             goto check_input;
 328         }
 329         /* This input has finished, ask it to die ! */
 330         else if( p_playlist->p_input->b_error
 331                   || p_playlist->p_input->b_eof )
 332         {
 333             PL_DEBUG( "finished input" );
 334             input_StopThread( p_playlist->p_input );
 335             /* No need to wait here, we'll wait in the p_input->b_die case */
 336             goto check_input;
 337         }
 338         else if( p_playlist->p_input->i_state != INIT_S )
 339         {
 340             PL_UNLOCK;
 341             ObjectGarbageCollector( p_playlist, false );
 342             PL_LOCK;
 343         }
 344     }
 345     else
 346     {
 347         /* No input. Several cases
 348          *  - No request, running status -> start new item
 349          *  - No request, stopped status -> collect garbage
 350          *  - Request, running requested -> start new item
 351          *  - Request, stopped requested -> collect garbage
 352         */
 353         if( p_playlist->request.i_status != PLAYLIST_STOPPED )
 354         {
 355             msg_Dbg( p_playlist, "starting new item" );
 356             p_item = playlist_NextItem( p_playlist );
 357
 358             if( p_item == NULL )
 359             {
 360                 msg_Dbg( p_playlist, "nothing to play" );
 361                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 362                 PL_UNLOCK;
 363
 364                 if( b_playexit == true )
 365                 {
 366                     msg_Info( p_playlist, "end of playlist, exiting" );
 367                     vlc_object_kill( p_playlist->p_libvlc );
 368                 }
 369                 ObjectGarbageCollector( p_playlist, true );
 370                 return;
 371              }
 372              playlist_PlayItem( p_playlist, p_item );
 373          }
 374          else
 375          {
 376             const bool b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 377
 378             p_playlist->status.i_status = PLAYLIST_STOPPED;
 379             if( p_playlist->status.p_item &&
 380                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 381             {
 382                 PL_DEBUG( "deleting item marked for deletion" );
 383                 playlist_ItemDelete( p_playlist->status.p_item );
 384                 p_playlist->status.p_item = NULL;
 385             }
 386
 387             /* Collect garbage */
 388             PL_UNLOCK;
 389             ObjectGarbageCollector( p_playlist, b_gc_forced );
 390             PL_LOCK;
 391         }
 392     }
 393     PL_UNLOCK;
 394 }
 395
 396 /**
 397  * Last loop
 398  *
 399  * The playlist is dying so do the last loop
 400  * \param p_playlist the playlist object
 401  * \return nothing
 402 */
 403 void playlist_LastLoop( playlist_t *p_playlist )
 404 {
 405     vlc_object_t *p_obj;
 406
 407     /* If there is an input, kill it */
 408     while( 1 )
 409     {
 410         PL_LOCK;
 411         if( p_playlist->p_input == NULL )
 412         {
 413             PL_UNLOCK;
 414             break;
 415         }
 416
 417         if( p_playlist->p_input->b_dead )
 418         {
 419             input_thread_t *p_input;
 420
 421             /* Unlink current input */
 422             p_input = p_playlist->p_input;
 423             p_playlist->p_input = NULL;
 424             PL_UNLOCK;
 425
 426             /* Destroy input */
 427             vlc_object_release( p_input );
 428             continue;
 429         }
 430         else if( p_playlist->p_input->b_die )
 431         {
 432             /* This input is dying, leave it alone */
 433             ;
 434         }
 435         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 436         {
 437             input_StopThread( p_playlist->p_input );
 438             PL_UNLOCK;
 439             continue;
 440         }
 441         else
 442         {
 443             p_playlist->p_input->b_eof = 1;
 444         }
 445         PL_UNLOCK;
 446
 447         msleep( INTF_IDLE_SLEEP );
 448     }
 449
 450     /* close all remaining sout */
 451     while( ( p_obj = vlc_object_find( p_playlist,
 452                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 453     {
 454         vlc_object_detach( p_obj );
 455         vlc_object_release( p_obj );
 456         sout_DeleteInstance( (sout_instance_t*)p_obj );
 457     }
 458
 459     /* close all remaining vout */
 460     while( ( p_obj = vlc_object_find( p_playlist,
 461                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 462     {
 463         vlc_object_detach( p_obj );
 464         vlc_object_release( p_obj );
 465         vout_Destroy( (vout_thread_t *)p_obj );
 466     }
 467
 468     while( p_playlist->i_sds )
 469     {
 470         playlist_ServicesDiscoveryRemove( p_playlist,
 471                                           p_playlist->pp_sds[0]->p_sd->psz_module );
 472     }
 473
 474     playlist_MLDump( p_playlist );
 475
 476     PL_LOCK;
 477     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 478         free( p_del->pp_children );
 479         vlc_gc_decref( p_del->p_input );
 480         free( p_del );
 481     FOREACH_END();
 482     ARRAY_RESET( p_playlist->all_items );
 483
 484     ARRAY_RESET( p_playlist->items );
 485     ARRAY_RESET( p_playlist->current );
 486
 487     PL_UNLOCK;
 488 }
 489
 490 /**
 491  * Preparse loop
 492  *
 493  * Main loop for preparser queue
 494  * \param p_obj items to preparse
 495  * \return nothing
 496  */
 497 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 498 {
 499     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 500     input_item_t *p_current;
 501     int i_activity;
 502
 503     while( !p_playlist->b_die )
 504     {
 505         vlc_object_lock( p_obj );
 506         while( p_obj->i_waiting == 0 )
 507         {
 508             if( vlc_object_wait( p_obj ) || p_playlist->b_die )
 509             {
 510                 vlc_object_unlock( p_obj );
 511                 return;
 512             }
 513         }
 514
 515         p_current = p_obj->pp_waiting[0];
 516         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 517         vlc_object_unlock( p_obj );
 518
 519         PL_LOCK;
 520         if( p_current )
 521         {
 522             if( p_current->i_type == ITEM_TYPE_FILE )
 523             {
 524                 stats_TimerStart( p_playlist, "Preparse run",
 525                                   STATS_TIMER_PREPARSE );
 526                 /* Do not preparse if it is already done (like by playing it) */
 527                 if( !input_item_IsPreparsed( p_current ) )
 528                 {
 529                     PL_UNLOCK;
 530                     input_Preparse( p_playlist, p_current );
 531                     PL_LOCK;
 532                 }
 533                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 534                 PL_UNLOCK;
 535                 input_item_SetPreparsed( p_current, true );
 536                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 537                 PL_LOCK;
 538             }
 539             /* If we haven't retrieved enough meta, add to secondary queue
 540              * which will run the "meta fetchers".
 541              * This only checks for meta, not for art
 542              * \todo don't do this for things we won't get meta for, like vids
 543              */
 544             char *psz_arturl = input_item_GetArtURL( p_current );
 545             char *psz_name = input_item_GetName( p_current );
 546             if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 547                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 548             {
 549                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 550                 vlc_object_lock( p_playlist->p_fetcher );
 551                 INSERT_ELEM( p_playlist->p_fetcher->pp_waiting,
 552                              p_playlist->p_fetcher->i_waiting,
 553                              p_playlist->p_fetcher->i_waiting, p_current);
 554                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 555                 vlc_object_unlock( p_playlist->p_fetcher );
 556             }
 557             else
 558             {
 559                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 560                           psz_name, psz_arturl );
 561                 vlc_gc_decref( p_current );
 562             }
 563             free( psz_name );
 564             free( psz_arturl );
 565             PL_UNLOCK;
 566         }
 567         else
 568             PL_UNLOCK;
 569
 570         vlc_object_lock( p_obj );
 571         i_activity = var_GetInteger( p_playlist, "activity" );
 572         if( i_activity < 0 ) i_activity = 0;
 573         vlc_object_unlock( p_obj );
 574         /* Sleep at least 1ms */
 575         msleep( (i_activity+1) * 1000 );
 576     }
 577 }
 578
 579 /**
 580  * Fetcher loop
 581  *
 582  * Main loop for secondary preparser queue
 583  * \param p_obj items to preparse
 584  * \return nothing
 585  */
 586 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 587 {
 588     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 589     input_item_t *p_item;
 590     int i_activity;
 591
 592     while( !p_playlist->b_die )
 593     {
 594         vlc_mutex_lock( &p_obj->object_lock );
 595         while( p_obj->i_waiting == 0 )
 596         {
 597             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 598             if( p_playlist->b_die )
 599             {
 600                 vlc_mutex_unlock( &p_obj->object_lock );
 601                 return;
 602             }
 603         }
 604
 605         p_item = p_obj->pp_waiting[0];
 606         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 607         vlc_mutex_unlock( &p_obj->object_lock );
 608         if( p_item )
 609         {
 610             int i_ret;
 611
 612             /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 613              * (This can happen if we fetch art on play)
 614              * FIXME this doesn't work if we need to fetch meta before art ... */
 615             for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 616             {
 617                 bool b_break;
 618                 PL_LOCK;
 619                 b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 620                             p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 621                 PL_UNLOCK;
 622                 if( b_break )
 623                     break;
 624                 msleep( 50000 );
 625             }
 626
 627             i_ret = input_ArtFind( p_playlist, p_item );
 628             if( i_ret == 1 )
 629             {
 630                 PL_DEBUG( "downloading art for %s", p_item->psz_name );
 631                 if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 632                     input_item_SetArtNotFound( p_item, true );
 633                 else {
 634                     input_item_SetArtFetched( p_item, true );
 635                     var_SetInteger( p_playlist, "item-change",
 636                                     p_item->i_id );
 637                 }
 638             }
 639             else if( i_ret == 0 ) /* Was in cache */
 640             {
 641                 PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 642                 input_item_SetArtFetched( p_item, true );
 643                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 644             }
 645             else
 646             {
 647                 PL_DEBUG( "art not found for %s", p_item->psz_name );
 648                 input_item_SetArtNotFound( p_item, true );
 649             }
 650             vlc_gc_decref( p_item );
 651         }
 652         vlc_object_lock( p_obj );
 653         i_activity = var_GetInteger( p_playlist, "activity" );
 654         if( i_activity < 0 ) i_activity = 0;
 655         vlc_object_unlock( p_obj );
 656         /* Sleep at least 1ms */
 657         msleep( (i_activity+1) * 1000 );
 658     }
 659 }
 660
 661 static void VariablesInit( playlist_t *p_playlist )
 662 {
 663     vlc_value_t val;
 664     /* These variables control updates */
 665     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 666     val.b_bool = true;
 667     var_Set( p_playlist, "intf-change", val );
 668
 669     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 670     val.i_int = -1;
 671     var_Set( p_playlist, "item-change", val );
 672
 673     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 674     val.i_int = -1;
 675     var_Set( p_playlist, "item-deleted", val );
 676
 677     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 678
 679     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 680     val.i_int = -1;
 681     var_Set( p_playlist, "playlist-current", val );
 682
 683     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 684
 685     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 686     val.b_bool = true;
 687     var_Set( p_playlist, "intf-show", val );
 688
 689     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 690     var_SetInteger( p_playlist, "activity", 0 );
 691
 692     /* Variables to control playback */
 693     var_CreateGetBool( p_playlist, "play-and-stop" );
 694     var_CreateGetBool( p_playlist, "play-and-exit" );
 695     var_CreateGetBool( p_playlist, "random" );
 696     var_CreateGetBool( p_playlist, "repeat" );
 697     var_CreateGetBool( p_playlist, "loop" );
 698
 699     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 700 }