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

   1 /*****************************************************************************
   2  * engine.c : Run the playlist and handle its control
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Clément Stenac <zorglub@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #include <vlc/vlc.h>
  26 #include <vlc_vout.h>
  27 #include <vlc_sout.h>
  28 #include <vlc_playlist.h>
  29 #include <vlc_interface.h>
  30 #include "playlist_internal.h"
  31 #include "stream_output/stream_output.h" /* sout_DeleteInstance */
  32
  33 /*****************************************************************************
  34  * Local prototypes
  35  *****************************************************************************/
  36 static void VariablesInit( playlist_t *p_playlist );
  37
  38 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  39                            vlc_value_t oldval, vlc_value_t newval, void *a )
  40 {
  41     ((playlist_t*)p_this)->b_reset_currently_playing = VLC_TRUE;
  42     playlist_Signal( ((playlist_t*)p_this) );
  43     return VLC_SUCCESS;
  44 }
  45
  46 /**
  47  * Create playlist
  48  *
  49  * Create a playlist structure.
  50  * \param p_parent the vlc object that is to be the parent of this playlist
  51  * \return a pointer to the created playlist, or NULL on error
  52  */
  53 playlist_t * playlist_Create( vlc_object_t *p_parent )
  54 {
  55     playlist_t *p_playlist;
  56     vlc_bool_t b_save;
  57     int i_tree;
  58
  59     /* Allocate structure */
  60     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  61     if( !p_playlist )
  62     {
  63         msg_Err( p_parent, "out of memory" );
  64         return NULL;
  65     }
  66     p_parent->p_libvlc->p_playlist = p_playlist;
  67
  68     VariablesInit( p_playlist );
  69
  70     /* Initialise data structures */
  71     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  72     p_playlist->i_last_playlist_id = 0;
  73     p_playlist->i_last_input_id = 0;
  74     p_playlist->p_input = NULL;
  75
  76     p_playlist->gc_date = 0;
  77     p_playlist->b_cant_sleep = VLC_FALSE;
  78
  79     ARRAY_INIT( p_playlist->items );
  80     ARRAY_INIT( p_playlist->all_items );
  81     ARRAY_INIT( p_playlist->input_items );
  82     ARRAY_INIT( p_playlist->current );
  83
  84     p_playlist->i_current_index = 0;
  85     p_playlist->b_reset_currently_playing = VLC_TRUE;
  86     p_playlist->last_rebuild_date = 0;
  87
  88     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  89     p_playlist->b_always_tree = (i_tree == 1);
  90     p_playlist->b_never_tree = (i_tree == 2);
  91
  92     p_playlist->b_doing_ml = VLC_FALSE;
  93
  94     p_playlist->b_auto_preparse =
  95                         var_CreateGetBool( p_playlist, "auto-preparse") ;
  96
  97     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
  98                                                        0 );
  99     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 100                                                        0 );
 101
 102     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 103         return NULL;
 104
 105     /* Create playlist and media library */
 106     p_playlist->p_local_category = playlist_NodeCreate( p_playlist,
 107                               _( "Playlist" ),p_playlist->p_root_category, 0 );
 108     p_playlist->p_local_onelevel =  playlist_NodeCreate( p_playlist,
 109                               _( "Playlist" ), p_playlist->p_root_onelevel, 0 );
 110     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 111     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 112
 113     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 114         !p_playlist->p_local_category->p_input ||
 115         !p_playlist->p_local_onelevel->p_input )
 116         return NULL;
 117
 118     /* Link the nodes together. Todo: actually create them from the same input*/
 119     p_playlist->p_local_onelevel->p_input->i_id =
 120         p_playlist->p_local_category->p_input->i_id;
 121
 122     if( config_GetInt( p_playlist, "media-library") )
 123     {
 124         p_playlist->p_ml_category =   playlist_NodeCreate( p_playlist,
 125                          _( "Media Library" ), p_playlist->p_root_category, 0 );
 126         p_playlist->p_ml_onelevel =  playlist_NodeCreate( p_playlist,
 127                          _( "Media Library" ), p_playlist->p_root_onelevel, 0 );
 128
 129         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 130             return NULL;
 131
 132         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 133         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 134         p_playlist->p_ml_onelevel->p_input->i_id =
 135              p_playlist->p_ml_category->p_input->i_id;
 136
 137     }
 138     else
 139     {
 140         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 141     }
 142
 143     /* Initial status */
 144     p_playlist->status.p_item = NULL;
 145     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 146     p_playlist->request.b_request = VLC_FALSE;
 147     p_playlist->status.i_status = PLAYLIST_STOPPED;
 148
 149     p_playlist->i_sort = SORT_ID;
 150     p_playlist->i_order = ORDER_NORMAL;
 151
 152     b_save = p_playlist->b_auto_preparse;
 153     p_playlist->b_auto_preparse = VLC_FALSE;
 154     playlist_MLLoad( p_playlist );
 155     p_playlist->b_auto_preparse = VLC_TRUE;
 156     return p_playlist;
 157 }
 158
 159 void playlist_Destroy( playlist_t *p_playlist )
 160 {
 161     var_Destroy( p_playlist, "intf-change" );
 162     var_Destroy( p_playlist, "item-change" );
 163     var_Destroy( p_playlist, "playlist-current" );
 164     var_Destroy( p_playlist, "intf-popmenu" );
 165     var_Destroy( p_playlist, "intf-show" );
 166     var_Destroy( p_playlist, "play-and-stop" );
 167     var_Destroy( p_playlist, "play-and-exit" );
 168     var_Destroy( p_playlist, "random" );
 169     var_Destroy( p_playlist, "repeat" );
 170     var_Destroy( p_playlist, "loop" );
 171     var_Destroy( p_playlist, "activity" );
 172
 173     vlc_mutex_destroy( &p_playlist->gc_lock );
 174     vlc_object_detach( p_playlist );
 175     vlc_object_destroy( p_playlist );
 176 }
 177
 178 /* Destroy remaining objects */
 179 static void ObjectGarbageCollector( playlist_t *p_playlist )
 180 {
 181     vlc_object_t *p_obj;
 182
 183     if( mdate() - p_playlist->gc_date < 1000000 )
 184     {
 185         p_playlist->b_cant_sleep = VLC_TRUE;
 186         return;
 187     }
 188     else if( p_playlist->gc_date == 0 )
 189         return;
 190
 191     vlc_mutex_lock( &p_playlist->gc_lock );
 192     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 193                                                   FIND_CHILD ) ) )
 194     {
 195         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 196         {
 197             vlc_object_release( p_obj );
 198             break;
 199         }
 200         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 201         vlc_object_detach( p_obj );
 202         vlc_object_release( p_obj );
 203         vout_Destroy( (vout_thread_t *)p_obj );
 204     }
 205     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 206                                                   FIND_CHILD ) ) )
 207     {
 208         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 209         {
 210             vlc_object_release( p_obj );
 211             break;
 212         }
 213         vlc_object_release( p_obj );
 214         sout_DeleteInstance( (sout_instance_t*)p_obj );
 215     }
 216     p_playlist->b_cant_sleep = VLC_FALSE;
 217     vlc_mutex_unlock( &p_playlist->gc_lock );
 218 }
 219
 220 /** Main loop for the playlist */
 221 void playlist_MainLoop( playlist_t *p_playlist )
 222 {
 223     playlist_item_t *p_item = NULL;
 224     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 225     PL_LOCK;
 226
 227     if( p_playlist->b_reset_currently_playing &&
 228         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 229     {
 230         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
 231                              p_playlist->status.p_item );
 232         p_playlist->last_rebuild_date = mdate();
 233     }
 234
 235 check_input:
 236     /* If there is an input, check that it doesn't need to die. */
 237     if( p_playlist->p_input )
 238     {
 239         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 240         {
 241             PL_DEBUG( "incoming request - stopping current input" );
 242             input_StopThread( p_playlist->p_input );
 243         }
 244
 245         /* This input is dead. Remove it ! */
 246         if( p_playlist->p_input->b_dead )
 247         {
 248             int i_activity;
 249             input_thread_t *p_input;
 250             PL_DEBUG( "dead input" );
 251
 252             p_input = p_playlist->p_input;
 253             p_playlist->p_input = NULL;
 254
 255             /* Release the playlist lock, because we may get stuck
 256              * in input_DestroyThread() for some time. */
 257             PL_UNLOCK
 258
 259             /* Destroy input */
 260             input_DestroyThread( p_input );
 261
 262             PL_LOCK;
 263
 264             p_playlist->gc_date = mdate();
 265             p_playlist->b_cant_sleep = VLC_TRUE;
 266
 267             if( p_playlist->status.p_item->i_flags
 268                 & PLAYLIST_REMOVE_FLAG )
 269             {
 270                  PL_DEBUG( "%s was marked for deletion, deleting",
 271                                  PLI_NAME( p_playlist->status.p_item  ) );
 272                  playlist_ItemDelete( p_playlist->status.p_item );
 273                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 274                      p_playlist->request.p_item = NULL;
 275                  p_playlist->status.p_item = NULL;
 276             }
 277
 278             i_activity= var_GetInteger( p_playlist, "activity") ;
 279             var_SetInteger( p_playlist, "activity", i_activity -
 280                             DEFAULT_INPUT_ACTIVITY );
 281             goto check_input;
 282         }
 283         /* This input is dying, let it do */
 284         else if( p_playlist->p_input->b_die )
 285         {
 286             PL_DEBUG( "dying input" );
 287             PL_UNLOCK;
 288             msleep( 25000 ); // 25 ms
 289             PL_LOCK;
 290             goto check_input;
 291         }
 292         /* This input has finished, ask it to die ! */
 293         else if( p_playlist->p_input->b_error
 294                   || p_playlist->p_input->b_eof )
 295         {
 296             PL_DEBUG( "finished input" );
 297             input_StopThread( p_playlist->p_input );
 298             /* No need to wait here, we'll wait in the p_input->b_die case */
 299             goto check_input;
 300         }
 301         else if( p_playlist->p_input->i_state != INIT_S )
 302         {
 303             PL_UNLOCK;
 304             ObjectGarbageCollector( p_playlist );
 305             PL_LOCK;
 306         }
 307     }
 308     else
 309     {
 310         /* No input. Several cases
 311          *  - No request, running status -> start new item
 312          *  - No request, stopped status -> collect garbage
 313          *  - Request, running requested -> start new item
 314          *  - Request, stopped requested -> collect garbage
 315          */
 316          if( (!p_playlist->request.b_request &&
 317               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 318               ( p_playlist->request.b_request &&
 319                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 320          {
 321              msg_Dbg( p_playlist, "starting new item" );
 322              p_item = playlist_NextItem( p_playlist );
 323
 324              if( p_item == NULL )
 325              {
 326                 msg_Dbg( p_playlist, "nothing to play" );
 327                 if( b_playexit == VLC_TRUE )
 328                 {
 329                     msg_Info( p_playlist, "end of playlist, exiting" );
 330                     p_playlist->p_libvlc->b_die = VLC_TRUE;
 331                 }
 332                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 333                 PL_UNLOCK
 334                 return;
 335              }
 336              playlist_PlayItem( p_playlist, p_item );
 337          }
 338          else
 339          {
 340             p_playlist->status.i_status = PLAYLIST_STOPPED;
 341             if( p_playlist->status.p_item &&
 342                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 343             {
 344                 PL_DEBUG( "deleting item marked for deletion" );
 345                 playlist_ItemDelete( p_playlist->status.p_item );
 346                 p_playlist->status.p_item = NULL;
 347             }
 348
 349             /* Collect garbage */
 350             PL_UNLOCK;
 351             ObjectGarbageCollector( p_playlist );
 352             PL_LOCK;
 353         }
 354     }
 355     PL_UNLOCK
 356 }
 357
 358 /** Playlist dying last loop */
 359 void playlist_LastLoop( playlist_t *p_playlist )
 360 {
 361     vlc_object_t *p_obj;
 362
 363     /* If there is an input, kill it */
 364     while( 1 )
 365     {
 366         PL_LOCK
 367
 368         if( p_playlist->p_input == NULL )
 369         {
 370             PL_UNLOCK
 371             break;
 372         }
 373
 374         if( p_playlist->p_input->b_dead )
 375         {
 376             input_thread_t *p_input;
 377
 378             /* Unlink current input */
 379             p_input = p_playlist->p_input;
 380             p_playlist->p_input = NULL;
 381             PL_UNLOCK
 382
 383             /* Destroy input */
 384             input_DestroyThread( p_input );
 385             continue;
 386         }
 387         else if( p_playlist->p_input->b_die )
 388         {
 389             /* This input is dying, leave it alone */
 390             ;
 391         }
 392         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 393         {
 394             input_StopThread( p_playlist->p_input );
 395             PL_UNLOCK
 396             continue;
 397         }
 398         else
 399         {
 400             p_playlist->p_input->b_eof = 1;
 401         }
 402
 403         PL_UNLOCK
 404
 405         msleep( INTF_IDLE_SLEEP );
 406     }
 407
 408     /* close all remaining sout */
 409     while( ( p_obj = vlc_object_find( p_playlist,
 410                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 411     {
 412         vlc_object_release( p_obj );
 413         sout_DeleteInstance( (sout_instance_t*)p_obj );
 414     }
 415
 416     /* close all remaining vout */
 417     while( ( p_obj = vlc_object_find( p_playlist,
 418                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 419     {
 420         vlc_object_detach( p_obj );
 421         vlc_object_release( p_obj );
 422         vout_Destroy( (vout_thread_t *)p_obj );
 423     }
 424
 425     while( p_playlist->i_sds )
 426     {
 427         playlist_ServicesDiscoveryRemove( p_playlist,
 428                                           p_playlist->pp_sds[0]->psz_module );
 429     }
 430
 431     playlist_MLDump( p_playlist );
 432
 433     PL_LOCK;
 434     /* Go through all items, and simply free everything without caring
 435      * about the tree structure. Do not decref, it will be done by doing
 436      * the same thing on the input items array */
 437     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 438         free( p_del->pp_children );
 439         free( p_del );
 440     FOREACH_END();
 441     ARRAY_RESET( p_playlist->all_items );
 442
 443     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 444         input_ItemClean( p_del );
 445         free( p_del );
 446     FOREACH_END();
 447     ARRAY_RESET( p_playlist->input_items );
 448
 449     ARRAY_RESET( p_playlist->items );
 450     ARRAY_RESET( p_playlist->current );
 451
 452     PL_UNLOCK;
 453 }
 454
 455 /** Main loop for preparser queue */
 456 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 457 {
 458     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 459     input_item_t *p_current;
 460     int i_activity;
 461     uint32_t i_m, i_o;
 462
 463     while( !p_playlist->b_die )
 464     {
 465         vlc_mutex_lock( &p_obj->object_lock );
 466         while( p_obj->i_waiting == 0 )
 467         {
 468             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 469             if( p_playlist->b_die )
 470             {
 471                 vlc_mutex_unlock( &p_obj->object_lock );
 472                 return;
 473             }
 474         }
 475
 476         p_current = p_obj->pp_waiting[0];
 477         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 478         vlc_mutex_unlock( &p_obj->object_lock );
 479
 480         PL_LOCK;
 481         if( p_current )
 482         {
 483             vlc_bool_t b_preparsed = VLC_FALSE;
 484             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
 485                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
 486                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
 487                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
 488                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
 489                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
 490                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
 491                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
 492             {
 493                 b_preparsed = VLC_TRUE;
 494                 stats_TimerStart( p_playlist, "Preparse run",
 495                                   STATS_TIMER_PREPARSE );
 496                 PL_UNLOCK;
 497                 input_Preparse( p_playlist, p_current );
 498                 PL_LOCK;
 499                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 500             }
 501             PL_UNLOCK;
 502             if( b_preparsed )
 503             {
 504                 p_current->p_meta->i_status |= ITEM_PREPARSED;
 505                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 506             }
 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             if( p_current->p_meta &&
 515                 !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 516             {
 517                 preparse_item_t p;
 518                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
 519                 p.p_item = p_current;
 520                 p.b_fetch_art = VLC_FALSE;
 521                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 522                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 523                              p_playlist->p_fetcher->i_waiting,
 524                              p_playlist->p_fetcher->i_waiting, p);
 525                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 526                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 527             }
 528             /* We already have all needed meta, but we need art right now */
 529             else if( p_current->p_meta &&
 530                      p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 531                      EMPTY_STR( p_current->p_meta->psz_arturl ) )
 532             {
 533                 preparse_item_t p;
 534                 PL_DEBUG("meta ok for %s, need to fetch art",
 535                                                          p_current->psz_name );
 536                 p.p_item = p_current;
 537                 p.b_fetch_art = VLC_TRUE;
 538                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 539                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 540                              p_playlist->p_fetcher->i_waiting,
 541                              p_playlist->p_fetcher->i_waiting, p);
 542                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 543                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 544             }
 545             else
 546             {
 547                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 548                           p_current->psz_name,
 549                           p_current->p_meta ? p_current->p_meta->psz_arturl:
 550                                               "null" );
 551                 vlc_gc_decref( p_current );
 552             }
 553             PL_UNLOCK;
 554         }
 555         else
 556             PL_UNLOCK;
 557
 558         vlc_mutex_lock( &p_obj->object_lock );
 559         i_activity = var_GetInteger( p_playlist, "activity" );
 560         if( i_activity < 0 ) i_activity = 0;
 561         vlc_mutex_unlock( &p_obj->object_lock );
 562         /* Sleep at least 1ms */
 563         msleep( (i_activity+1) * 1000 );
 564     }
 565 }
 566
 567 /** Main loop for secondary preparser queue */
 568 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 569 {
 570     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 571     vlc_bool_t b_fetch_art;
 572     input_item_t *p_item;
 573     int i_activity;
 574
 575     while( !p_playlist->b_die )
 576     {
 577         vlc_mutex_lock( &p_obj->object_lock );
 578         while( p_obj->i_waiting == 0 )
 579         {
 580             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 581             if( p_playlist->b_die )
 582             {
 583                 vlc_mutex_unlock( &p_obj->object_lock );
 584                 return;
 585             }
 586         }
 587
 588         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 589         p_item = p_obj->p_waiting->p_item;
 590         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 591         vlc_mutex_unlock( &p_obj->object_lock );
 592         if( p_item )
 593         {
 594             assert( p_item->p_meta );
 595             if( !b_fetch_art )
 596             {
 597                 input_MetaFetch( p_playlist, p_item );
 598                 p_item->p_meta->i_status |= ITEM_META_FETCHED;
 599                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 600                 /*  Fetch right now */
 601                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 602                 {
 603                     vlc_mutex_lock( &p_obj->object_lock );
 604                     preparse_item_t p;
 605                     p.p_item = p_item;
 606                     p.b_fetch_art = VLC_TRUE;
 607                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 608                                  p_playlist->p_fetcher->i_waiting,
 609                                  0, p );
 610                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
 611                     vlc_mutex_unlock( &p_obj->object_lock );
 612                     continue;
 613                 }
 614                 else
 615                     vlc_gc_decref( p_item );
 616             }
 617             else
 618             {
 619                 int i_ret = input_ArtFind( p_playlist, p_item );
 620                 if( i_ret == 1 )
 621                 {
 622                     PL_DEBUG("downloading art for %s", p_item->psz_name );
 623                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 624                         p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 625                     else {
 626                         p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 627                         var_SetInteger( p_playlist, "item-change",
 628                                         p_item->i_id );
 629                     }
 630                 }
 631                 else if( i_ret == 0 ) /* Was in cache */
 632                 {
 633                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
 634                     p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 635                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 636                 }
 637                 else
 638                 {
 639                     PL_DEBUG("art not found for %s", p_item->psz_name );
 640                     p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 641                 }
 642                 vlc_gc_decref( p_item );
 643            }
 644         }
 645         vlc_mutex_lock( &p_obj->object_lock );
 646         i_activity = var_GetInteger( p_playlist, "activity" );
 647         if( i_activity < 0 ) i_activity = 0;
 648         vlc_mutex_unlock( &p_obj->object_lock );
 649         /* Sleep at least 1ms */
 650         msleep( (i_activity+1) * 1000 );
 651     }
 652 }
 653
 654 static void VariablesInit( playlist_t *p_playlist )
 655 {
 656     vlc_value_t val;
 657     /* These variables control updates */
 658     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 659     val.b_bool = VLC_TRUE;
 660     var_Set( p_playlist, "intf-change", val );
 661
 662     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 663     val.i_int = -1;
 664     var_Set( p_playlist, "item-change", val );
 665
 666     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 667     val.i_int = -1;
 668     var_Set( p_playlist, "item-deleted", val );
 669
 670     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 671
 672     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 673     val.i_int = -1;
 674     var_Set( p_playlist, "playlist-current", val );
 675
 676     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 677
 678     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 679     val.b_bool = VLC_TRUE;
 680     var_Set( p_playlist, "intf-show", val );
 681
 682     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 683     var_SetInteger( p_playlist, "activity", 0 );
 684
 685     /* Variables to control playback */
 686     var_CreateGetBool( p_playlist, "play-and-stop" );
 687     var_CreateGetBool( p_playlist, "play-and-exit" );
 688     var_CreateGetBool( p_playlist, "random" );
 689     var_CreateGetBool( p_playlist, "repeat" );
 690     var_CreateGetBool( p_playlist, "loop" );
 691
 692     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 693 }