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 #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     (void)psz_cmd; (void)oldval; (void)newval; (void)a;
  42
  43     ((playlist_t*)p_this)->b_reset_currently_playing = VLC_TRUE;
  44     playlist_Signal( ((playlist_t*)p_this) );
  45     return VLC_SUCCESS;
  46 }
  47
  48 /**
  49  * Create playlist
  50  *
  51  * Create a playlist structure.
  52  * \param p_parent the vlc object that is to be the parent of this playlist
  53  * \return a pointer to the created playlist, or NULL on error
  54  */
  55 playlist_t * playlist_Create( vlc_object_t *p_parent )
  56 {
  57     playlist_t *p_playlist;
  58     vlc_bool_t b_save;
  59     int i_tree;
  60
  61     /* Allocate structure */
  62     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  63     if( !p_playlist )
  64     {
  65         msg_Err( p_parent, "out of memory" );
  66         return NULL;
  67     }
  68
  69     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
  70
  71     p_parent->p_libvlc->p_playlist = p_playlist;
  72
  73     VariablesInit( p_playlist );
  74
  75     /* Initialise data structures */
  76     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  77     p_playlist->i_last_playlist_id = 0;
  78     p_playlist->i_last_input_id = 0;
  79     p_playlist->p_input = NULL;
  80
  81     p_playlist->gc_date = 0;
  82     p_playlist->b_cant_sleep = VLC_FALSE;
  83
  84     ARRAY_INIT( p_playlist->items );
  85     ARRAY_INIT( p_playlist->all_items );
  86     ARRAY_INIT( p_playlist->input_items );
  87     ARRAY_INIT( p_playlist->current );
  88
  89     p_playlist->i_current_index = 0;
  90     p_playlist->b_reset_currently_playing = VLC_TRUE;
  91     p_playlist->last_rebuild_date = 0;
  92
  93     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  94     p_playlist->b_always_tree = (i_tree == 1);
  95     p_playlist->b_never_tree = (i_tree == 2);
  96
  97     p_playlist->b_doing_ml = VLC_FALSE;
  98
  99     p_playlist->b_auto_preparse =
 100                         var_CreateGetBool( p_playlist, "auto-preparse") ;
 101
 102     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 103                                                        0 );
 104     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 105                                                        0 );
 106
 107     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 108         return NULL;
 109
 110     /* Create playlist and media library */
 111     p_playlist->p_local_category = playlist_NodeCreate( p_playlist,
 112                               _( "Playlist" ),p_playlist->p_root_category, 0 );
 113     p_playlist->p_local_onelevel =  playlist_NodeCreate( p_playlist,
 114                               _( "Playlist" ), p_playlist->p_root_onelevel, 0 );
 115     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 116     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 117
 118     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 119         !p_playlist->p_local_category->p_input ||
 120         !p_playlist->p_local_onelevel->p_input )
 121         return NULL;
 122
 123     /* Link the nodes together. Todo: actually create them from the same input*/
 124     p_playlist->p_local_onelevel->p_input->i_id =
 125         p_playlist->p_local_category->p_input->i_id;
 126
 127     if( config_GetInt( p_playlist, "media-library") )
 128     {
 129         p_playlist->p_ml_category =   playlist_NodeCreate( p_playlist,
 130                          _( "Media Library" ), p_playlist->p_root_category, 0 );
 131         p_playlist->p_ml_onelevel =  playlist_NodeCreate( p_playlist,
 132                          _( "Media Library" ), p_playlist->p_root_onelevel, 0 );
 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         p_playlist->p_ml_onelevel->p_input->i_id =
 140              p_playlist->p_ml_category->p_input->i_id;
 141
 142     }
 143     else
 144     {
 145         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 146     }
 147
 148     /* Initial status */
 149     p_playlist->status.p_item = NULL;
 150     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 151     p_playlist->request.b_request = VLC_FALSE;
 152     p_playlist->status.i_status = PLAYLIST_STOPPED;
 153
 154     p_playlist->i_sort = SORT_ID;
 155     p_playlist->i_order = ORDER_NORMAL;
 156
 157     b_save = p_playlist->b_auto_preparse;
 158     p_playlist->b_auto_preparse = VLC_FALSE;
 159     playlist_MLLoad( p_playlist );
 160     p_playlist->b_auto_preparse = VLC_TRUE;
 161     return p_playlist;
 162 }
 163
 164 void playlist_Destroy( playlist_t *p_playlist )
 165 {
 166     var_Destroy( p_playlist, "intf-change" );
 167     var_Destroy( p_playlist, "item-change" );
 168     var_Destroy( p_playlist, "playlist-current" );
 169     var_Destroy( p_playlist, "intf-popmenu" );
 170     var_Destroy( p_playlist, "intf-show" );
 171     var_Destroy( p_playlist, "play-and-stop" );
 172     var_Destroy( p_playlist, "play-and-exit" );
 173     var_Destroy( p_playlist, "random" );
 174     var_Destroy( p_playlist, "repeat" );
 175     var_Destroy( p_playlist, "loop" );
 176     var_Destroy( p_playlist, "activity" );
 177
 178     vlc_mutex_destroy( &p_playlist->gc_lock );
 179     vlc_object_detach( p_playlist );
 180     vlc_object_destroy( p_playlist );
 181 }
 182
 183 /* Destroy remaining objects */
 184 static void ObjectGarbageCollector( playlist_t *p_playlist, vlc_bool_t b_force )
 185 {
 186     vlc_object_t *p_obj;
 187
 188     if( !b_force )
 189     {
 190         if( mdate() - p_playlist->gc_date < 1000000 )
 191         {
 192             p_playlist->b_cant_sleep = VLC_TRUE;
 193             return;
 194         }
 195         else if( p_playlist->gc_date == 0 )
 196             return;
 197     }
 198
 199     vlc_mutex_lock( &p_playlist->gc_lock );
 200     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 201                                                   FIND_CHILD ) ) )
 202     {
 203         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 204         {
 205             vlc_object_release( p_obj );
 206             break;
 207         }
 208         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 209         vlc_object_detach( p_obj );
 210         vlc_object_release( p_obj );
 211         vout_Destroy( (vout_thread_t *)p_obj );
 212     }
 213     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 214                                                   FIND_CHILD ) ) )
 215     {
 216         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 217         {
 218             vlc_object_release( p_obj );
 219             break;
 220         }
 221         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 222         vlc_object_detach( p_obj );
 223         vlc_object_release( p_obj );
 224         sout_DeleteInstance( (sout_instance_t*)p_obj );
 225     }
 226     p_playlist->b_cant_sleep = VLC_FALSE;
 227     vlc_mutex_unlock( &p_playlist->gc_lock );
 228 }
 229
 230 /** Main loop for the playlist */
 231 void playlist_MainLoop( playlist_t *p_playlist )
 232 {
 233     playlist_item_t *p_item = NULL;
 234     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 235     PL_LOCK;
 236
 237     if( p_playlist->b_reset_currently_playing &&
 238         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 239     {
 240         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
 241                              p_playlist->status.p_item );
 242         p_playlist->last_rebuild_date = mdate();
 243     }
 244
 245 check_input:
 246     /* If there is an input, check that it doesn't need to die. */
 247     if( p_playlist->p_input )
 248     {
 249         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 250         {
 251             PL_DEBUG( "incoming request - stopping current input" );
 252             input_StopThread( p_playlist->p_input );
 253         }
 254
 255         /* This input is dead. Remove it ! */
 256         if( p_playlist->p_input->b_dead )
 257         {
 258             int i_activity;
 259             input_thread_t *p_input;
 260             PL_DEBUG( "dead input" );
 261
 262             p_input = p_playlist->p_input;
 263             p_playlist->p_input = NULL;
 264
 265             /* Release the playlist lock, because we may get stuck
 266              * in input_DestroyThread() for some time. */
 267             PL_UNLOCK
 268
 269             /* Destroy input */
 270             input_DestroyThread( p_input );
 271
 272             PL_LOCK;
 273
 274             p_playlist->gc_date = mdate();
 275             p_playlist->b_cant_sleep = VLC_TRUE;
 276
 277             if( p_playlist->status.p_item->i_flags
 278                 & PLAYLIST_REMOVE_FLAG )
 279             {
 280                  PL_DEBUG( "%s was marked for deletion, deleting",
 281                                  PLI_NAME( p_playlist->status.p_item  ) );
 282                  playlist_ItemDelete( p_playlist->status.p_item );
 283                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 284                      p_playlist->request.p_item = NULL;
 285                  p_playlist->status.p_item = NULL;
 286             }
 287
 288             i_activity= var_GetInteger( p_playlist, "activity") ;
 289             var_SetInteger( p_playlist, "activity", i_activity -
 290                             DEFAULT_INPUT_ACTIVITY );
 291             goto check_input;
 292         }
 293         /* This input is dying, let it do */
 294         else if( p_playlist->p_input->b_die )
 295         {
 296             PL_DEBUG( "dying input" );
 297             PL_UNLOCK;
 298             msleep( 25000 ); // 25 ms
 299             PL_LOCK;
 300             goto check_input;
 301         }
 302         /* This input has finished, ask it to die ! */
 303         else if( p_playlist->p_input->b_error
 304                   || p_playlist->p_input->b_eof )
 305         {
 306             PL_DEBUG( "finished input" );
 307             input_StopThread( p_playlist->p_input );
 308             /* No need to wait here, we'll wait in the p_input->b_die case */
 309             goto check_input;
 310         }
 311         else if( p_playlist->p_input->i_state != INIT_S )
 312         {
 313             PL_UNLOCK;
 314             ObjectGarbageCollector( p_playlist, VLC_FALSE );
 315             PL_LOCK;
 316         }
 317     }
 318     else
 319     {
 320         /* No input. Several cases
 321          *  - No request, running status -> start new item
 322          *  - No request, stopped status -> collect garbage
 323          *  - Request, running requested -> start new item
 324          *  - Request, stopped requested -> collect garbage
 325          */
 326          if( (!p_playlist->request.b_request &&
 327               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 328               ( p_playlist->request.b_request &&
 329                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 330          {
 331              msg_Dbg( p_playlist, "starting new item" );
 332              p_item = playlist_NextItem( p_playlist );
 333
 334              if( p_item == NULL )
 335              {
 336                 msg_Dbg( p_playlist, "nothing to play" );
 337                 if( b_playexit == VLC_TRUE )
 338                 {
 339                     msg_Info( p_playlist, "end of playlist, exiting" );
 340                     vlc_object_kill( p_playlist->p_libvlc );
 341                 }
 342                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 343                 PL_UNLOCK
 344
 345                 ObjectGarbageCollector( p_playlist, VLC_TRUE );
 346                 return;
 347              }
 348              playlist_PlayItem( p_playlist, p_item );
 349          }
 350          else
 351          {
 352             const vlc_bool_t b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 353
 354             p_playlist->status.i_status = PLAYLIST_STOPPED;
 355             if( p_playlist->status.p_item &&
 356                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 357             {
 358                 PL_DEBUG( "deleting item marked for deletion" );
 359                 playlist_ItemDelete( p_playlist->status.p_item );
 360                 p_playlist->status.p_item = NULL;
 361             }
 362
 363             /* Collect garbage */
 364             PL_UNLOCK;
 365             ObjectGarbageCollector( p_playlist, b_gc_forced );
 366             PL_LOCK;
 367         }
 368     }
 369     PL_UNLOCK
 370 }
 371
 372 /** Playlist dying last loop */
 373 void playlist_LastLoop( playlist_t *p_playlist )
 374 {
 375     vlc_object_t *p_obj;
 376
 377     /* If there is an input, kill it */
 378     while( 1 )
 379     {
 380         PL_LOCK
 381
 382         if( p_playlist->p_input == NULL )
 383         {
 384             PL_UNLOCK
 385             break;
 386         }
 387
 388         if( p_playlist->p_input->b_dead )
 389         {
 390             input_thread_t *p_input;
 391
 392             /* Unlink current input */
 393             p_input = p_playlist->p_input;
 394             p_playlist->p_input = NULL;
 395             PL_UNLOCK
 396
 397             /* Destroy input */
 398             input_DestroyThread( p_input );
 399             continue;
 400         }
 401         else if( p_playlist->p_input->b_die )
 402         {
 403             /* This input is dying, leave it alone */
 404             ;
 405         }
 406         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 407         {
 408             input_StopThread( p_playlist->p_input );
 409             PL_UNLOCK
 410             continue;
 411         }
 412         else
 413         {
 414             p_playlist->p_input->b_eof = 1;
 415         }
 416
 417         PL_UNLOCK
 418
 419         msleep( INTF_IDLE_SLEEP );
 420     }
 421
 422     /* close all remaining sout */
 423     while( ( p_obj = vlc_object_find( p_playlist,
 424                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 425     {
 426         vlc_object_detach( p_obj );
 427         vlc_object_release( p_obj );
 428         sout_DeleteInstance( (sout_instance_t*)p_obj );
 429     }
 430
 431     /* close all remaining vout */
 432     while( ( p_obj = vlc_object_find( p_playlist,
 433                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 434     {
 435         vlc_object_detach( p_obj );
 436         vlc_object_release( p_obj );
 437         vout_Destroy( (vout_thread_t *)p_obj );
 438     }
 439
 440     while( p_playlist->i_sds )
 441     {
 442         playlist_ServicesDiscoveryRemove( p_playlist,
 443                                           p_playlist->pp_sds[0]->p_sd->psz_module );
 444     }
 445
 446     playlist_MLDump( p_playlist );
 447
 448     PL_LOCK;
 449     /* Go through all items, and simply free everything without caring
 450      * about the tree structure. Do not decref, it will be done by doing
 451      * the same thing on the input items array */
 452     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 453         free( p_del->pp_children );
 454         free( p_del );
 455     FOREACH_END();
 456     ARRAY_RESET( p_playlist->all_items );
 457
 458     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 459         input_ItemClean( p_del );
 460         free( p_del );
 461     FOREACH_END();
 462     ARRAY_RESET( p_playlist->input_items );
 463
 464     ARRAY_RESET( p_playlist->items );
 465     ARRAY_RESET( p_playlist->current );
 466
 467     PL_UNLOCK;
 468 }
 469
 470 /** Main loop for preparser queue */
 471 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 472 {
 473     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 474     input_item_t *p_current;
 475     int i_activity;
 476     uint32_t i_m, i_o;
 477
 478     while( !p_playlist->b_die )
 479     {
 480         vlc_mutex_lock( &p_obj->object_lock );
 481         while( p_obj->i_waiting == 0 )
 482         {
 483             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 484             if( p_playlist->b_die )
 485             {
 486                 vlc_mutex_unlock( &p_obj->object_lock );
 487                 return;
 488             }
 489         }
 490
 491         p_current = p_obj->pp_waiting[0];
 492         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 493         vlc_mutex_unlock( &p_obj->object_lock );
 494
 495         PL_LOCK;
 496         if( p_current )
 497         {
 498             if( !strncmp( p_current->psz_uri, "file:", 5 ) )
 499             {
 500                 stats_TimerStart( p_playlist, "Preparse run",
 501                                   STATS_TIMER_PREPARSE );
 502                 /* Do not preparse if it is already done (like by playing it) */
 503                 if( !input_item_IsPreparsed( p_current ) )
 504                 {
 505                     PL_UNLOCK;
 506                     input_Preparse( p_playlist, p_current );
 507                     PL_LOCK;
 508                 }
 509                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 510                 PL_UNLOCK;
 511                 input_item_SetPreparsed( p_current, VLC_TRUE );
 512                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 513                 PL_LOCK;
 514             }
 515             /* If we haven't retrieved enough meta, add to secondary queue
 516              * which will run the "meta fetchers".
 517              * This only checks for meta, not for art
 518              * \todo don't do this for things we won't get meta for, like vids
 519              */
 520             char *psz_arturl = input_item_GetArtURL( p_current );
 521             char *psz_name = input_item_GetName( p_current );
 522             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 523             {
 524                 preparse_item_t p;
 525                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
 526                 p.p_item = p_current;
 527                 p.b_fetch_art = VLC_FALSE;
 528                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 529                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 530                              p_playlist->p_fetcher->i_waiting,
 531                              p_playlist->p_fetcher->i_waiting, p);
 532                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 533                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 534             }
 535             /* We already have all needed meta, but we need art right now */
 536             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 537                      EMPTY_STR( psz_arturl ) )
 538             {
 539                 preparse_item_t p;
 540                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 541                 p.p_item = p_current;
 542                 p.b_fetch_art = VLC_TRUE;
 543                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 544                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 545                              p_playlist->p_fetcher->i_waiting,
 546                              p_playlist->p_fetcher->i_waiting, p);
 547                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 548                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 549             }
 550             else
 551             {
 552                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 553                           psz_name, psz_arturl );
 554                 vlc_gc_decref( p_current );
 555             }
 556             free( psz_name );
 557             free( psz_arturl );
 558             PL_UNLOCK;
 559         }
 560         else
 561             PL_UNLOCK;
 562
 563         vlc_mutex_lock( &p_obj->object_lock );
 564         i_activity = var_GetInteger( p_playlist, "activity" );
 565         if( i_activity < 0 ) i_activity = 0;
 566         vlc_mutex_unlock( &p_obj->object_lock );
 567         /* Sleep at least 1ms */
 568         msleep( (i_activity+1) * 1000 );
 569     }
 570 }
 571
 572 /** Main loop for secondary preparser queue */
 573 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 574 {
 575     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 576     vlc_bool_t b_fetch_art;
 577     input_item_t *p_item;
 578     int i_activity;
 579
 580     while( !p_playlist->b_die )
 581     {
 582         vlc_mutex_lock( &p_obj->object_lock );
 583         while( p_obj->i_waiting == 0 )
 584         {
 585             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 586             if( p_playlist->b_die )
 587             {
 588                 vlc_mutex_unlock( &p_obj->object_lock );
 589                 return;
 590             }
 591         }
 592
 593         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 594         p_item = p_obj->p_waiting->p_item;
 595         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 596         vlc_mutex_unlock( &p_obj->object_lock );
 597         if( p_item )
 598         {
 599             if( !b_fetch_art )
 600             {
 601                 input_MetaFetch( p_playlist, p_item );
 602                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 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 }