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 = VLC_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     playlist_t *p_playlist;
  62     vlc_bool_t b_save;
  63     int i_tree;
  64
  65     /* Allocate structure */
  66     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  67     if( !p_playlist )
  68     {
  69         msg_Err( p_parent, "out of memory" );
  70         return NULL;
  71     }
  72
  73     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
  74
  75     p_parent->p_libvlc->p_playlist = p_playlist;
  76
  77     VariablesInit( p_playlist );
  78
  79     /* Initialise data structures */
  80     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  81     p_playlist->i_last_playlist_id = 0;
  82     p_playlist->i_last_input_id = 0;
  83     p_playlist->p_input = NULL;
  84
  85     p_playlist->gc_date = 0;
  86     p_playlist->b_cant_sleep = VLC_FALSE;
  87
  88     ARRAY_INIT( p_playlist->items );
  89     ARRAY_INIT( p_playlist->all_items );
  90     ARRAY_INIT( p_playlist->input_items );
  91     ARRAY_INIT( p_playlist->current );
  92
  93     p_playlist->i_current_index = 0;
  94     p_playlist->b_reset_currently_playing = VLC_TRUE;
  95     p_playlist->last_rebuild_date = 0;
  96
  97     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  98     p_playlist->b_always_tree = (i_tree == 1);
  99     p_playlist->b_never_tree = (i_tree == 2);
 100
 101     p_playlist->b_doing_ml = VLC_FALSE;
 102
 103     p_playlist->b_auto_preparse =
 104                         var_CreateGetBool( p_playlist, "auto-preparse") ;
 105
 106     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 107                                     0, NULL );
 108     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 109                                     0, p_playlist->p_root_category->p_input );
 110
 111     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 112         return NULL;
 113
 114     /* Create playlist and media library */
 115     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 116                             &p_playlist->p_local_category,
 117                             &p_playlist->p_local_onelevel, VLC_FALSE );
 118
 119     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 120     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 121
 122     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 123         !p_playlist->p_local_category->p_input ||
 124         !p_playlist->p_local_onelevel->p_input )
 125         return NULL;
 126
 127     if( config_GetInt( p_playlist, "media-library") )
 128     {
 129         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 130                             &p_playlist->p_ml_category,
 131                             &p_playlist->p_ml_onelevel, VLC_FALSE );
 132
 133         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 134             return NULL;
 135
 136         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 137         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 138     }
 139     else
 140     {
 141         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 142     }
 143
 144     /* Initial status */
 145     p_playlist->status.p_item = NULL;
 146     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 147     p_playlist->request.b_request = VLC_FALSE;
 148     p_playlist->status.i_status = PLAYLIST_STOPPED;
 149
 150     p_playlist->i_sort = SORT_ID;
 151     p_playlist->i_order = ORDER_NORMAL;
 152
 153     b_save = p_playlist->b_auto_preparse;
 154     p_playlist->b_auto_preparse = VLC_FALSE;
 155     playlist_MLLoad( p_playlist );
 156     p_playlist->b_auto_preparse = VLC_TRUE;
 157     return p_playlist;
 158 }
 159
 160 void playlist_Destroy( playlist_t *p_playlist )
 161 {
 162     var_Destroy( p_playlist, "intf-change" );
 163     var_Destroy( p_playlist, "item-change" );
 164     var_Destroy( p_playlist, "playlist-current" );
 165     var_Destroy( p_playlist, "intf-popupmenu" );
 166     var_Destroy( p_playlist, "intf-show" );
 167     var_Destroy( p_playlist, "play-and-stop" );
 168     var_Destroy( p_playlist, "play-and-exit" );
 169     var_Destroy( p_playlist, "random" );
 170     var_Destroy( p_playlist, "repeat" );
 171     var_Destroy( p_playlist, "loop" );
 172     var_Destroy( p_playlist, "activity" );
 173
 174     vlc_mutex_destroy( &p_playlist->gc_lock );
 175     vlc_object_detach( p_playlist );
 176     vlc_object_destroy( p_playlist );
 177 }
 178
 179 /* Destroy remaining objects */
 180 static void ObjectGarbageCollector( playlist_t *p_playlist, vlc_bool_t b_force )
 181 {
 182     vlc_object_t *p_obj;
 183
 184     if( !b_force )
 185     {
 186         if( mdate() - p_playlist->gc_date < 1000000 )
 187         {
 188             p_playlist->b_cant_sleep = VLC_TRUE;
 189             return;
 190         }
 191         else if( p_playlist->gc_date == 0 )
 192             return;
 193     }
 194
 195     vlc_mutex_lock( &p_playlist->gc_lock );
 196     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 197                                                   FIND_CHILD ) ) )
 198     {
 199         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 200         {
 201             vlc_object_release( p_obj );
 202             break;
 203         }
 204         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 205         vlc_object_detach( p_obj );
 206         vlc_object_release( p_obj );
 207         vout_Destroy( (vout_thread_t *)p_obj );
 208     }
 209     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 210                                                   FIND_CHILD ) ) )
 211     {
 212         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 213         {
 214             vlc_object_release( p_obj );
 215             break;
 216         }
 217         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 218         vlc_object_detach( p_obj );
 219         vlc_object_release( p_obj );
 220         sout_DeleteInstance( (sout_instance_t*)p_obj );
 221     }
 222     p_playlist->b_cant_sleep = VLC_FALSE;
 223     vlc_mutex_unlock( &p_playlist->gc_lock );
 224 }
 225
 226 /** Main loop for the playlist */
 227 void playlist_MainLoop( playlist_t *p_playlist )
 228 {
 229     playlist_item_t *p_item = NULL;
 230     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 231     PL_LOCK;
 232
 233     if( p_playlist->b_reset_currently_playing &&
 234         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 235     {
 236         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
 237                              p_playlist->status.p_item );
 238         p_playlist->last_rebuild_date = mdate();
 239     }
 240
 241 check_input:
 242     /* If there is an input, check that it doesn't need to die. */
 243     if( p_playlist->p_input )
 244     {
 245         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 246         {
 247             PL_DEBUG( "incoming request - stopping current input" );
 248             input_StopThread( p_playlist->p_input );
 249         }
 250
 251         /* This input is dead. Remove it ! */
 252         if( p_playlist->p_input->b_dead )
 253         {
 254             int i_activity;
 255             input_thread_t *p_input;
 256             PL_DEBUG( "dead input" );
 257
 258             p_input = p_playlist->p_input;
 259             p_playlist->p_input = NULL;
 260
 261             /* Release the playlist lock, because we may get stuck
 262              * in input_DestroyThread() for some time. */
 263             PL_UNLOCK;
 264
 265             /* Destroy input */
 266             input_DestroyThread( p_input );
 267
 268             PL_LOCK;
 269
 270             p_playlist->gc_date = mdate();
 271             p_playlist->b_cant_sleep = VLC_TRUE;
 272
 273             if( p_playlist->status.p_item->i_flags
 274                 & PLAYLIST_REMOVE_FLAG )
 275             {
 276                  PL_DEBUG( "%s was marked for deletion, deleting",
 277                                  PLI_NAME( p_playlist->status.p_item  ) );
 278                  playlist_ItemDelete( p_playlist->status.p_item );
 279                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 280                      p_playlist->request.p_item = NULL;
 281                  p_playlist->status.p_item = NULL;
 282             }
 283
 284             i_activity= var_GetInteger( p_playlist, "activity") ;
 285             var_SetInteger( p_playlist, "activity", i_activity -
 286                             DEFAULT_INPUT_ACTIVITY );
 287             goto check_input;
 288         }
 289         /* This input is dying, let it do */
 290         else if( p_playlist->p_input->b_die )
 291         {
 292             PL_DEBUG( "dying input" );
 293             PL_UNLOCK;
 294             msleep( INTF_IDLE_SLEEP );
 295             PL_LOCK;
 296             goto check_input;
 297         }
 298         /* This input has finished, ask it to die ! */
 299         else if( p_playlist->p_input->b_error
 300                   || p_playlist->p_input->b_eof )
 301         {
 302             PL_DEBUG( "finished input" );
 303             input_StopThread( p_playlist->p_input );
 304             /* No need to wait here, we'll wait in the p_input->b_die case */
 305             goto check_input;
 306         }
 307         else if( p_playlist->p_input->i_state != INIT_S )
 308         {
 309             PL_UNLOCK;
 310             ObjectGarbageCollector( p_playlist, VLC_FALSE );
 311             PL_LOCK;
 312         }
 313     }
 314     else
 315     {
 316         /* No input. Several cases
 317          *  - No request, running status -> start new item
 318          *  - No request, stopped status -> collect garbage
 319          *  - Request, running requested -> start new item
 320          *  - Request, stopped requested -> collect garbage
 321          */
 322          if( (!p_playlist->request.b_request &&
 323               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 324               ( p_playlist->request.b_request &&
 325                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 326          {
 327              msg_Dbg( p_playlist, "starting new item" );
 328              p_item = playlist_NextItem( p_playlist );
 329
 330              if( p_item == NULL )
 331              {
 332                 msg_Dbg( p_playlist, "nothing to play" );
 333                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 334                 PL_UNLOCK;
 335
 336                 if( b_playexit == VLC_TRUE )
 337                 {
 338                     msg_Info( p_playlist, "end of playlist, exiting" );
 339                     vlc_object_kill( p_playlist->p_libvlc );
 340                 }
 341                 ObjectGarbageCollector( p_playlist, VLC_TRUE );
 342                 return;
 343              }
 344              playlist_PlayItem( p_playlist, p_item );
 345          }
 346          else
 347          {
 348             const vlc_bool_t b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 349
 350             p_playlist->status.i_status = PLAYLIST_STOPPED;
 351             if( p_playlist->status.p_item &&
 352                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 353             {
 354                 PL_DEBUG( "deleting item marked for deletion" );
 355                 playlist_ItemDelete( p_playlist->status.p_item );
 356                 p_playlist->status.p_item = NULL;
 357             }
 358
 359             /* Collect garbage */
 360             PL_UNLOCK;
 361             ObjectGarbageCollector( p_playlist, b_gc_forced );
 362             PL_LOCK;
 363         }
 364     }
 365     PL_UNLOCK;
 366 }
 367
 368 /** Playlist dying last loop */
 369 void playlist_LastLoop( playlist_t *p_playlist )
 370 {
 371     vlc_object_t *p_obj;
 372
 373     /* If there is an input, kill it */
 374     while( 1 )
 375     {
 376         PL_LOCK;
 377         if( p_playlist->p_input == NULL )
 378         {
 379             PL_UNLOCK;
 380             break;
 381         }
 382
 383         if( p_playlist->p_input->b_dead )
 384         {
 385             input_thread_t *p_input;
 386
 387             /* Unlink current input */
 388             p_input = p_playlist->p_input;
 389             p_playlist->p_input = NULL;
 390             PL_UNLOCK;
 391
 392             /* Destroy input */
 393             input_DestroyThread( p_input );
 394             continue;
 395         }
 396         else if( p_playlist->p_input->b_die )
 397         {
 398             /* This input is dying, leave it alone */
 399             ;
 400         }
 401         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 402         {
 403             input_StopThread( p_playlist->p_input );
 404             PL_UNLOCK;
 405             continue;
 406         }
 407         else
 408         {
 409             p_playlist->p_input->b_eof = 1;
 410         }
 411         PL_UNLOCK;
 412
 413         msleep( INTF_IDLE_SLEEP );
 414     }
 415
 416     /* close all remaining sout */
 417     while( ( p_obj = vlc_object_find( p_playlist,
 418                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 419     {
 420         vlc_object_detach( p_obj );
 421         vlc_object_release( p_obj );
 422         sout_DeleteInstance( (sout_instance_t*)p_obj );
 423     }
 424
 425     /* close all remaining vout */
 426     while( ( p_obj = vlc_object_find( p_playlist,
 427                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 428     {
 429         vlc_object_detach( p_obj );
 430         vlc_object_release( p_obj );
 431         vout_Destroy( (vout_thread_t *)p_obj );
 432     }
 433
 434     while( p_playlist->i_sds )
 435     {
 436         playlist_ServicesDiscoveryRemove( p_playlist,
 437                                           p_playlist->pp_sds[0]->p_sd->psz_module );
 438     }
 439
 440     playlist_MLDump( p_playlist );
 441
 442     PL_LOCK;
 443     /* Go through all items, and simply free everything without caring
 444      * about the tree structure. Do not decref, it will be done by doing
 445      * the same thing on the input items array */
 446     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 447         free( p_del->pp_children );
 448         free( p_del );
 449     FOREACH_END();
 450     ARRAY_RESET( p_playlist->all_items );
 451
 452     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 453         input_ItemClean( p_del );
 454         free( p_del );
 455     FOREACH_END();
 456     ARRAY_RESET( p_playlist->input_items );
 457
 458     ARRAY_RESET( p_playlist->items );
 459     ARRAY_RESET( p_playlist->current );
 460
 461     PL_UNLOCK;
 462 }
 463
 464 /** Main loop for preparser queue */
 465 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 466 {
 467     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 468     input_item_t *p_current;
 469     int i_activity;
 470     uint32_t i_m, i_o;
 471
 472     while( !p_playlist->b_die )
 473     {
 474         vlc_mutex_lock( &p_obj->object_lock );
 475         while( p_obj->i_waiting == 0 )
 476         {
 477             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 478             if( p_playlist->b_die )
 479             {
 480                 vlc_mutex_unlock( &p_obj->object_lock );
 481                 return;
 482             }
 483         }
 484
 485         p_current = p_obj->pp_waiting[0];
 486         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 487         vlc_mutex_unlock( &p_obj->object_lock );
 488
 489         PL_LOCK;
 490         if( p_current )
 491         {
 492             if( p_current->i_type == ITEM_TYPE_FILE )
 493             {
 494                 stats_TimerStart( p_playlist, "Preparse run",
 495                                   STATS_TIMER_PREPARSE );
 496                 /* Do not preparse if it is already done (like by playing it) */
 497                 if( !input_item_IsPreparsed( p_current ) )
 498                 {
 499                     PL_UNLOCK;
 500                     input_Preparse( p_playlist, p_current );
 501                     PL_LOCK;
 502                 }
 503                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 504                 PL_UNLOCK;
 505                 input_item_SetPreparsed( p_current, VLC_TRUE );
 506                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 507                 PL_LOCK;
 508             }
 509             /* If we haven't retrieved enough meta, add to secondary queue
 510              * which will run the "meta fetchers".
 511              * This only checks for meta, not for art
 512              * \todo don't do this for things we won't get meta for, like vids
 513              */
 514             char *psz_arturl = input_item_GetArtURL( p_current );
 515             char *psz_name = input_item_GetName( p_current );
 516             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 517             {
 518                 preparse_item_t p;
 519                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
 520                 p.p_item = p_current;
 521                 p.b_fetch_art = VLC_FALSE;
 522                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 523                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 524                              p_playlist->p_fetcher->i_waiting,
 525                              p_playlist->p_fetcher->i_waiting, p);
 526                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 527                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 528             }
 529             /* We already have all needed meta, but we need art right now */
 530             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 531                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 532             {
 533                 preparse_item_t p;
 534                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 535                 p.p_item = p_current;
 536                 p.b_fetch_art = VLC_TRUE;
 537                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 538                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 539                              p_playlist->p_fetcher->i_waiting,
 540                              p_playlist->p_fetcher->i_waiting, p);
 541                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 542                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 543             }
 544             else
 545             {
 546                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 547                           psz_name, psz_arturl );
 548                 vlc_gc_decref( p_current );
 549             }
 550             free( psz_name );
 551             free( psz_arturl );
 552             PL_UNLOCK;
 553         }
 554         else
 555             PL_UNLOCK;
 556
 557         vlc_mutex_lock( &p_obj->object_lock );
 558         i_activity = var_GetInteger( p_playlist, "activity" );
 559         if( i_activity < 0 ) i_activity = 0;
 560         vlc_mutex_unlock( &p_obj->object_lock );
 561         /* Sleep at least 1ms */
 562         msleep( (i_activity+1) * 1000 );
 563     }
 564 }
 565
 566 /** Main loop for secondary preparser queue */
 567 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 568 {
 569     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 570     vlc_bool_t b_fetch_art;
 571     input_item_t *p_item;
 572     int i_activity;
 573
 574     while( !p_playlist->b_die )
 575     {
 576         vlc_mutex_lock( &p_obj->object_lock );
 577         while( p_obj->i_waiting == 0 )
 578         {
 579             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 580             if( p_playlist->b_die )
 581             {
 582                 vlc_mutex_unlock( &p_obj->object_lock );
 583                 return;
 584             }
 585         }
 586
 587         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 588         p_item = p_obj->p_waiting->p_item;
 589         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 590         vlc_mutex_unlock( &p_obj->object_lock );
 591         if( p_item )
 592         {
 593             if( !b_fetch_art )
 594             {
 595                 /* If the user doesn't want us to fetch meta automatically
 596                  * abort here. */
 597                 if( p_playlist->p_fetcher->b_fetch_meta )
 598                 {
 599                     input_MetaFetch( p_playlist, p_item );
 600                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 601                 }
 602
 603                 /*  Fetch right now */
 604                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 605                 {
 606                     vlc_mutex_lock( &p_obj->object_lock );
 607                     preparse_item_t p;
 608                     p.p_item = p_item;
 609                     p.b_fetch_art = VLC_TRUE;
 610                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 611                                  p_playlist->p_fetcher->i_waiting,
 612                                  0, p );
 613                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
 614                     vlc_mutex_unlock( &p_obj->object_lock );
 615                     continue;
 616                 }
 617                 else
 618                     vlc_gc_decref( p_item );
 619             }
 620             else
 621             {
 622                 int i_ret;
 623
 624                 /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 625                  * (This can happen if we fetch art on play)
 626                  * FIXME this doesn't work if we need to fetch meta before art ... */
 627                 for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 628                 {
 629                     vlc_bool_t b_break;
 630                     PL_LOCK;
 631                     b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 632                                 p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 633                     PL_UNLOCK;
 634                     if( b_break )
 635                         break;
 636                     msleep( 50000 );
 637                 }
 638
 639                 i_ret = input_ArtFind( p_playlist, p_item );
 640                 if( i_ret == 1 )
 641                 {
 642                     PL_DEBUG("downloading art for %s", p_item->psz_name );
 643                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 644                         input_item_SetArtNotFound( p_item, VLC_TRUE );
 645                     else {
 646                         input_item_SetArtFetched( p_item, VLC_TRUE );
 647                         var_SetInteger( p_playlist, "item-change",
 648                                         p_item->i_id );
 649                     }
 650                 }
 651                 else if( i_ret == 0 ) /* Was in cache */
 652                 {
 653                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
 654                     input_item_SetArtFetched( p_item, VLC_TRUE );
 655                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 656                 }
 657                 else
 658                 {
 659                     PL_DEBUG("art not found for %s", p_item->psz_name );
 660                     input_item_SetArtNotFound( p_item, VLC_TRUE );
 661                 }
 662                 vlc_gc_decref( p_item );
 663            }
 664         }
 665         vlc_mutex_lock( &p_obj->object_lock );
 666         i_activity = var_GetInteger( p_playlist, "activity" );
 667         if( i_activity < 0 ) i_activity = 0;
 668         vlc_mutex_unlock( &p_obj->object_lock );
 669         /* Sleep at least 1ms */
 670         msleep( (i_activity+1) * 1000 );
 671     }
 672 }
 673
 674 static void VariablesInit( playlist_t *p_playlist )
 675 {
 676     vlc_value_t val;
 677     /* These variables control updates */
 678     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 679     val.b_bool = VLC_TRUE;
 680     var_Set( p_playlist, "intf-change", val );
 681
 682     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 683     val.i_int = -1;
 684     var_Set( p_playlist, "item-change", val );
 685
 686     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 687     val.i_int = -1;
 688     var_Set( p_playlist, "item-deleted", val );
 689
 690     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 691
 692     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 693     val.i_int = -1;
 694     var_Set( p_playlist, "playlist-current", val );
 695
 696     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 697
 698     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 699     val.b_bool = VLC_TRUE;
 700     var_Set( p_playlist, "intf-show", val );
 701
 702     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 703     var_SetInteger( p_playlist, "activity", 0 );
 704
 705     /* Variables to control playback */
 706     var_CreateGetBool( p_playlist, "play-and-stop" );
 707     var_CreateGetBool( p_playlist, "play-and-exit" );
 708     var_CreateGetBool( p_playlist, "random" );
 709     var_CreateGetBool( p_playlist, "repeat" );
 710     var_CreateGetBool( p_playlist, "loop" );
 711
 712     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 713 }