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 = VLC_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     playlist_t *p_playlist;
  63     vlc_bool_t b_save;
  64     int i_tree;
  65
  66     /* Allocate structure */
  67     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  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     p_parent->p_libvlc->p_playlist = p_playlist;
  77
  78     VariablesInit( p_playlist );
  79
  80     /* Initialise data structures */
  81     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  82     p_playlist->i_last_playlist_id = 0;
  83     p_playlist->i_last_input_id = 0;
  84     p_playlist->p_input = NULL;
  85
  86     p_playlist->gc_date = 0;
  87     p_playlist->b_cant_sleep = VLC_FALSE;
  88
  89     ARRAY_INIT( p_playlist->items );
  90     ARRAY_INIT( p_playlist->all_items );
  91     ARRAY_INIT( p_playlist->input_items );
  92     ARRAY_INIT( p_playlist->current );
  93
  94     p_playlist->i_current_index = 0;
  95     p_playlist->b_reset_currently_playing = VLC_TRUE;
  96     p_playlist->last_rebuild_date = 0;
  97
  98     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  99     p_playlist->b_always_tree = (i_tree == 1);
 100     p_playlist->b_never_tree = (i_tree == 2);
 101
 102     p_playlist->b_doing_ml = VLC_FALSE;
 103
 104     p_playlist->b_auto_preparse =
 105                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
 106
 107     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 108                                     0, NULL );
 109     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 110                                     0, p_playlist->p_root_category->p_input );
 111
 112     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 113         return NULL;
 114
 115     /* Create playlist and media library */
 116     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 117                             &p_playlist->p_local_category,
 118                             &p_playlist->p_local_onelevel, VLC_FALSE );
 119
 120     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 121     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 122
 123     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 124         !p_playlist->p_local_category->p_input ||
 125         !p_playlist->p_local_onelevel->p_input )
 126         return NULL;
 127
 128     if( config_GetInt( p_playlist, "media-library") )
 129     {
 130         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 131                             &p_playlist->p_ml_category,
 132                             &p_playlist->p_ml_onelevel, VLC_FALSE );
 133
 134         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 135             return NULL;
 136
 137         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 138         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 139     }
 140     else
 141     {
 142         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 143     }
 144
 145     /* Initial status */
 146     p_playlist->status.p_item = NULL;
 147     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 148     p_playlist->request.b_request = VLC_FALSE;
 149     p_playlist->status.i_status = PLAYLIST_STOPPED;
 150
 151     p_playlist->i_sort = SORT_ID;
 152     p_playlist->i_order = ORDER_NORMAL;
 153
 154
 155     b_save = p_playlist->b_auto_preparse;
 156     p_playlist->b_auto_preparse = VLC_FALSE;
 157     playlist_MLLoad( p_playlist );
 158     p_playlist->b_auto_preparse = VLC_TRUE;
 159
 160     vlc_object_set_destructor( p_playlist, playlist_Destructor );
 161
 162     return p_playlist;
 163 }
 164
 165 /**
 166  * Destroy playlist
 167  *
 168  * Destroy a playlist structure.
 169  * \param p_playlist the playlist object
 170  * \return nothing
 171  */
 172 void playlist_Destroy( playlist_t *p_playlist )
 173 {
 174     /* XXX: should go in the playlist destructor */
 175     var_Destroy( p_playlist, "intf-change" );
 176     var_Destroy( p_playlist, "item-change" );
 177     var_Destroy( p_playlist, "playlist-current" );
 178     var_Destroy( p_playlist, "intf-popupmenu" );
 179     var_Destroy( p_playlist, "intf-show" );
 180     var_Destroy( p_playlist, "play-and-stop" );
 181     var_Destroy( p_playlist, "play-and-exit" );
 182     var_Destroy( p_playlist, "random" );
 183     var_Destroy( p_playlist, "repeat" );
 184     var_Destroy( p_playlist, "loop" );
 185     var_Destroy( p_playlist, "activity" );
 186
 187     vlc_object_release( p_playlist );
 188 }
 189
 190 static void playlist_Destructor( vlc_object_t * p_this )
 191 {
 192     playlist_t * p_playlist = (playlist_t *)p_this;
 193
 194     // Kill preparser
 195     if( p_playlist->p_preparse )
 196     {
 197         vlc_object_release( p_playlist->p_preparse );
 198     }
 199
 200     // Kill meta fetcher
 201     if( p_playlist->p_fetcher )
 202     {
 203         vlc_object_release( p_playlist->p_fetcher );
 204     }
 205
 206     // Stats
 207     vlc_mutex_destroy( &p_playlist->p_stats->lock );
 208     if( p_playlist->p_stats )
 209         free( p_playlist->p_stats );
 210 }
 211
 212 /* Destroy remaining objects */
 213 static void ObjectGarbageCollector( playlist_t *p_playlist, vlc_bool_t b_force )
 214 {
 215     vlc_object_t *p_obj;
 216
 217     if( !b_force )
 218     {
 219         if( mdate() - p_playlist->gc_date < 1000000 )
 220         {
 221             p_playlist->b_cant_sleep = VLC_TRUE;
 222             return;
 223         }
 224         else if( p_playlist->gc_date == 0 )
 225             return;
 226     }
 227
 228     vlc_mutex_lock( &p_playlist->gc_lock );
 229     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 230                                                   FIND_CHILD ) ) )
 231     {
 232         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 233         {
 234             vlc_object_release( p_obj );
 235             break;
 236         }
 237         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 238         vlc_object_detach( p_obj );
 239         vlc_object_release( p_obj );
 240         vout_Destroy( (vout_thread_t *)p_obj );
 241     }
 242     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 243                                                   FIND_CHILD ) ) )
 244     {
 245         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 246         {
 247             vlc_object_release( p_obj );
 248             break;
 249         }
 250         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 251         vlc_object_detach( p_obj );
 252         vlc_object_release( p_obj );
 253         sout_DeleteInstance( (sout_instance_t*)p_obj );
 254     }
 255     p_playlist->b_cant_sleep = VLC_FALSE;
 256     vlc_mutex_unlock( &p_playlist->gc_lock );
 257 }
 258
 259 /**
 260  * Main loop
 261  *
 262  * Main loop for the playlist
 263  * \param p_playlist the playlist object
 264  * \return nothing
 265  */
 266 void playlist_MainLoop( playlist_t *p_playlist )
 267 {
 268     playlist_item_t *p_item = NULL;
 269     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 270     PL_LOCK;
 271
 272     if( p_playlist->b_reset_currently_playing &&
 273         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 274     {
 275         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 276                              p_playlist->status.p_item );
 277         p_playlist->last_rebuild_date = mdate();
 278     }
 279
 280 check_input:
 281     /* If there is an input, check that it doesn't need to die. */
 282     if( p_playlist->p_input )
 283     {
 284         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 285         {
 286             PL_DEBUG( "incoming request - stopping current input" );
 287             input_StopThread( p_playlist->p_input );
 288         }
 289
 290         /* This input is dead. Remove it ! */
 291         if( p_playlist->p_input->b_dead )
 292         {
 293             int i_activity;
 294             input_thread_t *p_input;
 295             PL_DEBUG( "dead input" );
 296
 297             p_input = p_playlist->p_input;
 298             p_playlist->p_input = NULL;
 299
 300             /* Release the playlist lock, because we may get stuck
 301              * in vlc_object_release() for some time. */
 302             PL_UNLOCK;
 303
 304             /* Destroy input */
 305             vlc_object_release( p_input );
 306
 307             PL_LOCK;
 308
 309             p_playlist->gc_date = mdate();
 310             p_playlist->b_cant_sleep = VLC_TRUE;
 311
 312             if( p_playlist->status.p_item->i_flags
 313                 & PLAYLIST_REMOVE_FLAG )
 314             {
 315                  PL_DEBUG( "%s was marked for deletion, deleting",
 316                                  PLI_NAME( p_playlist->status.p_item  ) );
 317                  playlist_ItemDelete( p_playlist->status.p_item );
 318                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 319                      p_playlist->request.p_item = NULL;
 320                  p_playlist->status.p_item = NULL;
 321             }
 322
 323             i_activity= var_GetInteger( p_playlist, "activity" );
 324             var_SetInteger( p_playlist, "activity", i_activity -
 325                             DEFAULT_INPUT_ACTIVITY );
 326             goto check_input;
 327         }
 328         /* This input is dying, let it do */
 329         else if( p_playlist->p_input->b_die )
 330         {
 331             PL_DEBUG( "dying input" );
 332             PL_UNLOCK;
 333             msleep( INTF_IDLE_SLEEP );
 334             PL_LOCK;
 335             goto check_input;
 336         }
 337         /* This input has finished, ask it to die ! */
 338         else if( p_playlist->p_input->b_error
 339                   || p_playlist->p_input->b_eof )
 340         {
 341             PL_DEBUG( "finished input" );
 342             input_StopThread( p_playlist->p_input );
 343             /* No need to wait here, we'll wait in the p_input->b_die case */
 344             goto check_input;
 345         }
 346         else if( p_playlist->p_input->i_state != INIT_S )
 347         {
 348             PL_UNLOCK;
 349             ObjectGarbageCollector( p_playlist, VLC_FALSE );
 350             PL_LOCK;
 351         }
 352     }
 353     else
 354     {
 355         /* No input. Several cases
 356          *  - No request, running status -> start new item
 357          *  - No request, stopped status -> collect garbage
 358          *  - Request, running requested -> start new item
 359          *  - Request, stopped requested -> collect garbage
 360         */
 361         if( p_playlist->request.i_status != PLAYLIST_STOPPED )
 362         {
 363             msg_Dbg( p_playlist, "starting new item" );
 364             p_item = playlist_NextItem( p_playlist );
 365
 366             if( p_item == NULL )
 367             {
 368                 msg_Dbg( p_playlist, "nothing to play" );
 369                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 370                 PL_UNLOCK;
 371
 372                 if( b_playexit == VLC_TRUE )
 373                 {
 374                     msg_Info( p_playlist, "end of playlist, exiting" );
 375                     vlc_object_kill( p_playlist->p_libvlc );
 376                 }
 377                 ObjectGarbageCollector( p_playlist, VLC_TRUE );
 378                 return;
 379              }
 380              playlist_PlayItem( p_playlist, p_item );
 381          }
 382          else
 383          {
 384             const vlc_bool_t b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 385
 386             p_playlist->status.i_status = PLAYLIST_STOPPED;
 387             if( p_playlist->status.p_item &&
 388                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 389             {
 390                 PL_DEBUG( "deleting item marked for deletion" );
 391                 playlist_ItemDelete( p_playlist->status.p_item );
 392                 p_playlist->status.p_item = NULL;
 393             }
 394
 395             /* Collect garbage */
 396             PL_UNLOCK;
 397             ObjectGarbageCollector( p_playlist, b_gc_forced );
 398             PL_LOCK;
 399         }
 400     }
 401     PL_UNLOCK;
 402 }
 403
 404
 405 /**
 406  * Last loop
 407  *
 408  * The playlist is dying so do the last loop
 409  * \param p_playlist the playlist object
 410  * \return nothing
 411 */
 412 void playlist_LastLoop( playlist_t *p_playlist )
 413 {
 414     vlc_object_t *p_obj;
 415
 416     /* If there is an input, kill it */
 417     while( 1 )
 418     {
 419         PL_LOCK;
 420         if( p_playlist->p_input == NULL )
 421         {
 422             PL_UNLOCK;
 423             break;
 424         }
 425
 426         if( p_playlist->p_input->b_dead )
 427         {
 428             input_thread_t *p_input;
 429
 430             /* Unlink current input */
 431             p_input = p_playlist->p_input;
 432             p_playlist->p_input = NULL;
 433             PL_UNLOCK;
 434
 435             /* Destroy input */
 436             vlc_object_release( p_input );
 437             continue;
 438         }
 439         else if( p_playlist->p_input->b_die )
 440         {
 441             /* This input is dying, leave it alone */
 442             ;
 443         }
 444         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 445         {
 446             input_StopThread( p_playlist->p_input );
 447             PL_UNLOCK;
 448             continue;
 449         }
 450         else
 451         {
 452             p_playlist->p_input->b_eof = 1;
 453         }
 454         PL_UNLOCK;
 455
 456         msleep( INTF_IDLE_SLEEP );
 457     }
 458
 459     /* close all remaining sout */
 460     while( ( p_obj = vlc_object_find( p_playlist,
 461                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 462     {
 463         vlc_object_detach( p_obj );
 464         vlc_object_release( p_obj );
 465         sout_DeleteInstance( (sout_instance_t*)p_obj );
 466     }
 467
 468     /* close all remaining vout */
 469     while( ( p_obj = vlc_object_find( p_playlist,
 470                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 471     {
 472         vlc_object_detach( p_obj );
 473         vlc_object_release( p_obj );
 474         vout_Destroy( (vout_thread_t *)p_obj );
 475     }
 476
 477     while( p_playlist->i_sds )
 478     {
 479         playlist_ServicesDiscoveryRemove( p_playlist,
 480                                           p_playlist->pp_sds[0]->p_sd->psz_module );
 481     }
 482
 483     playlist_MLDump( p_playlist );
 484
 485     PL_LOCK;
 486     /* Go through all items, and simply free everything without caring
 487      * about the tree structure. Do not decref, it will be done by doing
 488      * the same thing on the input items array */
 489     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 490         free( p_del->pp_children );
 491         free( p_del );
 492     FOREACH_END();
 493     ARRAY_RESET( p_playlist->all_items );
 494
 495     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 496         input_ItemClean( p_del );
 497         free( p_del );
 498     FOREACH_END();
 499     ARRAY_RESET( p_playlist->input_items );
 500
 501     ARRAY_RESET( p_playlist->items );
 502     ARRAY_RESET( p_playlist->current );
 503
 504     PL_UNLOCK;
 505 }
 506
 507 /**
 508  * Preparse loop
 509  *
 510  * Main loop for preparser queue
 511  * \param p_obj items to preparse
 512  * \return nothing
 513  */
 514 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 515 {
 516     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 517     input_item_t *p_current;
 518     int i_activity;
 519     uint32_t i_m, i_o;
 520
 521     while( !p_playlist->b_die )
 522     {
 523         vlc_object_lock( p_obj );
 524         while( p_obj->i_waiting == 0 )
 525         {
 526             if( vlc_object_wait( p_obj ) || p_playlist->b_die )
 527             {
 528                 vlc_object_unlock( p_obj );
 529                 return;
 530             }
 531         }
 532
 533         p_current = p_obj->pp_waiting[0];
 534         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 535         vlc_object_unlock( p_obj );
 536
 537         PL_LOCK;
 538         if( p_current )
 539         {
 540             if( p_current->i_type == ITEM_TYPE_FILE )
 541             {
 542                 stats_TimerStart( p_playlist, "Preparse run",
 543                                   STATS_TIMER_PREPARSE );
 544                 /* Do not preparse if it is already done (like by playing it) */
 545                 if( !input_item_IsPreparsed( p_current ) )
 546                 {
 547                     PL_UNLOCK;
 548                     input_Preparse( p_playlist, p_current );
 549                     PL_LOCK;
 550                 }
 551                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 552                 PL_UNLOCK;
 553                 input_item_SetPreparsed( p_current, VLC_TRUE );
 554                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 555                 PL_LOCK;
 556             }
 557             /* If we haven't retrieved enough meta, add to secondary queue
 558              * which will run the "meta fetchers".
 559              * This only checks for meta, not for art
 560              * \todo don't do this for things we won't get meta for, like vids
 561              */
 562             char *psz_arturl = input_item_GetArtURL( p_current );
 563             char *psz_name = input_item_GetName( p_current );
 564             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 565             {
 566                 preparse_item_t p;
 567                 PL_DEBUG( "need to fetch meta for %s", p_current->psz_name );
 568                 p.p_item = p_current;
 569                 p.b_fetch_art = VLC_FALSE;
 570                 vlc_object_lock( p_playlist->p_fetcher );
 571                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 572                              p_playlist->p_fetcher->i_waiting,
 573                              p_playlist->p_fetcher->i_waiting, p);
 574                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 575                 vlc_object_unlock( p_playlist->p_fetcher );
 576             }
 577             /* We already have all needed meta, but we need art right now */
 578             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 579                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 580             {
 581                 preparse_item_t p;
 582                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 583                 p.p_item = p_current;
 584                 p.b_fetch_art = VLC_TRUE;
 585                 vlc_object_lock( p_playlist->p_fetcher );
 586                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 587                              p_playlist->p_fetcher->i_waiting,
 588                              p_playlist->p_fetcher->i_waiting, p);
 589                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 590                 vlc_object_unlock( p_playlist->p_fetcher );
 591             }
 592             else
 593             {
 594                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 595                           psz_name, psz_arturl );
 596                 vlc_gc_decref( p_current );
 597             }
 598             free( psz_name );
 599             free( psz_arturl );
 600             PL_UNLOCK;
 601         }
 602         else
 603             PL_UNLOCK;
 604
 605         vlc_object_lock( p_obj );
 606         i_activity = var_GetInteger( p_playlist, "activity" );
 607         if( i_activity < 0 ) i_activity = 0;
 608         vlc_object_unlock( p_obj );
 609         /* Sleep at least 1ms */
 610         msleep( (i_activity+1) * 1000 );
 611     }
 612 }
 613
 614 /**
 615  * Fetcher loop
 616  *
 617  * Main loop for secondary preparser queue
 618  * \param p_obj items to preparse
 619  * \return nothing
 620  */
 621 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 622 {
 623     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 624     vlc_bool_t b_fetch_art;
 625     input_item_t *p_item;
 626     int i_activity;
 627
 628     while( !p_playlist->b_die )
 629     {
 630         vlc_mutex_lock( &p_obj->object_lock );
 631         while( p_obj->i_waiting == 0 )
 632         {
 633             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 634             if( p_playlist->b_die )
 635             {
 636                 vlc_mutex_unlock( &p_obj->object_lock );
 637                 return;
 638             }
 639         }
 640
 641         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 642         p_item = p_obj->p_waiting->p_item;
 643         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 644         vlc_mutex_unlock( &p_obj->object_lock );
 645         if( p_item )
 646         {
 647             if( !b_fetch_art )
 648             {
 649                 /* If the user doesn't want us to fetch meta automatically
 650                  * abort here. */
 651                 if( p_playlist->p_fetcher->b_fetch_meta )
 652                 {
 653                     input_MetaFetch( p_playlist, p_item );
 654                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 655                 }
 656
 657                 /*  Fetch right now */
 658                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 659                 {
 660                     vlc_mutex_lock( &p_obj->object_lock );
 661                     preparse_item_t p;
 662                     p.p_item = p_item;
 663                     p.b_fetch_art = VLC_TRUE;
 664                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 665                                  p_playlist->p_fetcher->i_waiting,
 666                                  0, p );
 667                     PL_DEBUG( "meta fetched for %s, get art", p_item->psz_name );
 668                     vlc_mutex_unlock( &p_obj->object_lock );
 669                     continue;
 670                 }
 671                 else
 672                     vlc_gc_decref( p_item );
 673             }
 674             else
 675             {
 676                 int i_ret;
 677
 678                 /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 679                  * (This can happen if we fetch art on play)
 680                  * FIXME this doesn't work if we need to fetch meta before art ... */
 681                 for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 682                 {
 683                     vlc_bool_t b_break;
 684                     PL_LOCK;
 685                     b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 686                                 p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 687                     PL_UNLOCK;
 688                     if( b_break )
 689                         break;
 690                     msleep( 50000 );
 691                 }
 692
 693                 i_ret = input_ArtFind( p_playlist, p_item );
 694                 if( i_ret == 1 )
 695                 {
 696                     PL_DEBUG( "downloading art for %s", p_item->psz_name );
 697                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 698                         input_item_SetArtNotFound( p_item, VLC_TRUE );
 699                     else {
 700                         input_item_SetArtFetched( p_item, VLC_TRUE );
 701                         var_SetInteger( p_playlist, "item-change",
 702                                         p_item->i_id );
 703                     }
 704                 }
 705                 else if( i_ret == 0 ) /* Was in cache */
 706                 {
 707                     PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 708                     input_item_SetArtFetched( p_item, VLC_TRUE );
 709                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 710                 }
 711                 else
 712                 {
 713                     PL_DEBUG( "art not found for %s", p_item->psz_name );
 714                     input_item_SetArtNotFound( p_item, VLC_TRUE );
 715                 }
 716                 vlc_gc_decref( p_item );
 717            }
 718         }
 719         vlc_object_lock( p_obj );
 720         i_activity = var_GetInteger( p_playlist, "activity" );
 721         if( i_activity < 0 ) i_activity = 0;
 722         vlc_object_unlock( p_obj );
 723         /* Sleep at least 1ms */
 724         msleep( (i_activity+1) * 1000 );
 725     }
 726 }
 727
 728 static void VariablesInit( playlist_t *p_playlist )
 729 {
 730     vlc_value_t val;
 731     /* These variables control updates */
 732     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 733     val.b_bool = VLC_TRUE;
 734     var_Set( p_playlist, "intf-change", val );
 735
 736     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 737     val.i_int = -1;
 738     var_Set( p_playlist, "item-change", val );
 739
 740     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 741     val.i_int = -1;
 742     var_Set( p_playlist, "item-deleted", val );
 743
 744     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 745
 746     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 747     val.i_int = -1;
 748     var_Set( p_playlist, "playlist-current", val );
 749
 750     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 751
 752     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 753     val.b_bool = VLC_TRUE;
 754     var_Set( p_playlist, "intf-show", val );
 755
 756     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 757     var_SetInteger( p_playlist, "activity", 0 );
 758
 759     /* Variables to control playback */
 760     var_CreateGetBool( p_playlist, "play-and-stop" );
 761     var_CreateGetBool( p_playlist, "play-and-exit" );
 762     var_CreateGetBool( p_playlist, "random" );
 763     var_CreateGetBool( p_playlist, "repeat" );
 764     var_CreateGetBool( p_playlist, "loop" );
 765
 766     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 767 }