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/input.h>
  29 #include "vlc_playlist.h"
  30 #include "vlc_interaction.h"
  31 #include "playlist_internal.h"
  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     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL);
  99
 100     /* Create playlist and media library */
 101     p_playlist->p_local_category = playlist_NodeCreate( p_playlist,
 102                                  _( "Playlist" ),p_playlist->p_root_category );
 103     p_playlist->p_local_onelevel =  playlist_NodeCreate( p_playlist,
 104                                 _( "Playlist" ), p_playlist->p_root_onelevel );
 105     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 106     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 107
 108     /* Link the nodes together. Todo: actually create them from the same input*/
 109     p_playlist->p_local_onelevel->p_input->i_id =
 110         p_playlist->p_local_category->p_input->i_id;
 111
 112     if( config_GetInt( p_playlist, "media-library") )
 113     {
 114         p_playlist->p_ml_category =   playlist_NodeCreate( p_playlist,
 115                            _( "Media Library" ), p_playlist->p_root_category );
 116         p_playlist->p_ml_onelevel =  playlist_NodeCreate( p_playlist,
 117                            _( "Media Library" ), p_playlist->p_root_onelevel );
 118         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 119         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 120         p_playlist->p_ml_onelevel->p_input->i_id =
 121              p_playlist->p_ml_category->p_input->i_id;
 122
 123     }
 124     else
 125     {
 126         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 127     }
 128
 129     /* Initial status */
 130     p_playlist->status.p_item = NULL;
 131     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 132     p_playlist->request.b_request = VLC_FALSE;
 133     p_playlist->status.i_status = PLAYLIST_STOPPED;
 134
 135     p_playlist->i_sort = SORT_ID;
 136     p_playlist->i_order = ORDER_NORMAL;
 137
 138     vlc_object_attach( p_playlist, p_parent );
 139     b_save = p_playlist->b_auto_preparse;
 140     p_playlist->b_auto_preparse = VLC_FALSE;
 141     playlist_MLLoad( p_playlist );
 142     p_playlist->b_auto_preparse = VLC_TRUE;
 143     return p_playlist;
 144 }
 145
 146 void playlist_Destroy( playlist_t *p_playlist )
 147 {
 148     while( p_playlist->i_sds )
 149     {
 150         playlist_ServicesDiscoveryRemove( p_playlist,
 151                                           p_playlist->pp_sds[0]->psz_module );
 152     }
 153
 154     playlist_MLDump( p_playlist );
 155
 156     vlc_thread_join( p_playlist->p_preparse );
 157     vlc_thread_join( p_playlist->p_fetcher );
 158     vlc_thread_join( p_playlist );
 159
 160     vlc_object_detach( p_playlist->p_preparse );
 161     vlc_object_detach( p_playlist->p_fetcher );
 162
 163     var_Destroy( p_playlist, "intf-change" );
 164     var_Destroy( p_playlist, "item-change" );
 165     var_Destroy( p_playlist, "playlist-current" );
 166     var_Destroy( p_playlist, "intf-popmenu" );
 167     var_Destroy( p_playlist, "intf-show" );
 168     var_Destroy( p_playlist, "play-and-stop" );
 169     var_Destroy( p_playlist, "play-and-exit" );
 170     var_Destroy( p_playlist, "random" );
 171     var_Destroy( p_playlist, "repeat" );
 172     var_Destroy( p_playlist, "loop" );
 173     var_Destroy( p_playlist, "activity" );
 174
 175     PL_LOCK;
 176     /* Go through all items, and simply free everything without caring
 177      * about the tree structure. Do not decref, it will be done by doing
 178      * the same thing on the input items array */
 179     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 180         free( p_del->pp_children );
 181         free( p_del );
 182     FOREACH_END();
 183     ARRAY_RESET( p_playlist->all_items );
 184
 185     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 186         input_ItemClean( p_del );
 187         free( p_del );
 188     FOREACH_END();
 189     ARRAY_RESET( p_playlist->input_items );
 190
 191     ARRAY_RESET( p_playlist->items );
 192     ARRAY_RESET( p_playlist->current );
 193
 194     PL_UNLOCK;
 195
 196     if( p_playlist->p_stats )
 197         free( p_playlist->p_stats );
 198
 199     vlc_mutex_destroy( &p_playlist->gc_lock );
 200     vlc_object_destroy( p_playlist->p_preparse );
 201     vlc_object_destroy( p_playlist->p_fetcher );
 202     vlc_object_detach( p_playlist );
 203     vlc_object_destroy( p_playlist );
 204
 205 }
 206
 207 /* Destroy remaining objects */
 208 static void ObjectGarbageCollector( playlist_t *p_playlist )
 209 {
 210     vlc_object_t *p_obj;
 211
 212     if( mdate() - p_playlist->gc_date < 1000000 )
 213     {
 214         p_playlist->b_cant_sleep = VLC_TRUE;
 215         return;
 216     }
 217     else if( p_playlist->gc_date == 0 )
 218         return;
 219
 220     vlc_mutex_lock( &p_playlist->gc_lock );
 221     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 222                                                   FIND_CHILD ) ) )
 223     {
 224         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 225         {
 226             vlc_object_release( p_obj );
 227             break;
 228         }
 229         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 230         vlc_object_detach( p_obj );
 231         vlc_object_release( p_obj );
 232         vout_Destroy( (vout_thread_t *)p_obj );
 233     }
 234     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 235                                                   FIND_CHILD ) ) )
 236     {
 237         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 238         {
 239             vlc_object_release( p_obj );
 240             break;
 241         }
 242         vlc_object_release( p_obj );
 243         sout_DeleteInstance( (sout_instance_t*)p_obj );
 244     }
 245     p_playlist->b_cant_sleep = VLC_FALSE;
 246     vlc_mutex_unlock( &p_playlist->gc_lock );
 247 }
 248
 249 /** Main loop for the playlist */
 250 void playlist_MainLoop( playlist_t *p_playlist )
 251 {
 252     playlist_item_t *p_item = NULL;
 253     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 254     PL_LOCK;
 255
 256     if( p_playlist->b_reset_currently_playing &&
 257         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 258     {
 259         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
 260                              p_playlist->status.p_item );
 261         p_playlist->last_rebuild_date = mdate();
 262     }
 263
 264 check_input:
 265     /* If there is an input, check that it doesn't need to die. */
 266     if( p_playlist->p_input )
 267     {
 268         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 269         {
 270             PL_DEBUG( "incoming request - stopping current input" );
 271             input_StopThread( p_playlist->p_input );
 272         }
 273
 274         /* This input is dead. Remove it ! */
 275         if( p_playlist->p_input->b_dead )
 276         {
 277             int i_activity;
 278             input_thread_t *p_input;
 279             PL_DEBUG( "dead input" );
 280
 281             p_input = p_playlist->p_input;
 282             p_playlist->p_input = NULL;
 283
 284             /* Release the playlist lock, because we may get stuck
 285              * in input_DestroyThread() for some time. */
 286             PL_UNLOCK
 287
 288             /* Destroy input */
 289             input_DestroyThread( p_input );
 290
 291             /* Unlink current input
 292              * (_after_ input_DestroyThread for vout garbage collector) */
 293             vlc_object_detach( p_input );
 294
 295             /* Destroy object */
 296             vlc_object_destroy( p_input );
 297
 298             PL_LOCK;
 299
 300             p_playlist->gc_date = mdate();
 301             p_playlist->b_cant_sleep = VLC_TRUE;
 302
 303             if( p_playlist->status.p_item->i_flags
 304                 & PLAYLIST_REMOVE_FLAG )
 305             {
 306                  PL_DEBUG( "%s was marked for deletion, deleting",
 307                                  PLI_NAME( p_playlist->status.p_item  ) );
 308                  playlist_ItemDelete( p_playlist->status.p_item );
 309                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 310                      p_playlist->request.p_item = NULL;
 311                  p_playlist->status.p_item = NULL;
 312             }
 313
 314             i_activity= var_GetInteger( p_playlist, "activity") ;
 315             var_SetInteger( p_playlist, "activity", i_activity -
 316                             DEFAULT_INPUT_ACTIVITY );
 317             goto check_input;
 318         }
 319         /* This input is dying, let it do */
 320         else if( p_playlist->p_input->b_die )
 321         {
 322             PL_DEBUG( "dying input" );
 323             msleep( 25000 ); // 25 ms
 324             goto check_input;
 325         }
 326         /* This input has finished, ask it to die ! */
 327         else if( p_playlist->p_input->b_error
 328                   || p_playlist->p_input->b_eof )
 329         {
 330             PL_DEBUG( "finished input" );
 331             input_StopThread( p_playlist->p_input );
 332             /* No need to wait here, we'll wait in the p_input->b_die case */
 333             goto check_input;
 334         }
 335         else if( p_playlist->p_input->i_state != INIT_S )
 336         {
 337             PL_UNLOCK;
 338             ObjectGarbageCollector( p_playlist );
 339             PL_LOCK;
 340         }
 341     }
 342     else
 343     {
 344         /* No input. Several cases
 345          *  - No request, running status -> start new item
 346          *  - No request, stopped status -> collect garbage
 347          *  - Request, running requested -> start new item
 348          *  - Request, stopped requested -> collect garbage
 349          */
 350          if( (!p_playlist->request.b_request &&
 351               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 352               ( p_playlist->request.b_request &&
 353                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 354          {
 355              msg_Dbg( p_playlist, "starting new item" );
 356              p_item = playlist_NextItem( p_playlist );
 357
 358              if( p_item == NULL )
 359              {
 360                 msg_Dbg( p_playlist, "nothing to play" );
 361                 if( b_playexit == VLC_TRUE )
 362                 {
 363                     msg_Info( p_playlist, "end of playlist, exiting" );
 364                     p_playlist->p_libvlc->b_die = VLC_TRUE;
 365                 }
 366                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 367                 PL_UNLOCK
 368                 return;
 369              }
 370              playlist_PlayItem( p_playlist, p_item );
 371          }
 372          else
 373          {
 374             p_playlist->status.i_status = PLAYLIST_STOPPED;
 375             if( p_playlist->status.p_item &&
 376                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 377             {
 378                 PL_DEBUG( "deleting item marked for deletion" );
 379                 playlist_ItemDelete( p_playlist->status.p_item );
 380                 p_playlist->status.p_item = NULL;
 381             }
 382
 383             /* Collect garbage */
 384             PL_UNLOCK;
 385             ObjectGarbageCollector( p_playlist );
 386             PL_LOCK;
 387         }
 388     }
 389     PL_UNLOCK
 390 }
 391
 392 /** Playlist dying last loop */
 393 void playlist_LastLoop( playlist_t *p_playlist )
 394 {
 395     vlc_object_t *p_obj;
 396
 397     /* If there is an input, kill it */
 398     while( 1 )
 399     {
 400         PL_LOCK
 401
 402         if( p_playlist->p_input == NULL )
 403         {
 404             PL_UNLOCK
 405             break;
 406         }
 407
 408         if( p_playlist->p_input->b_dead )
 409         {
 410             input_thread_t *p_input;
 411
 412             /* Unlink current input */
 413             p_input = p_playlist->p_input;
 414             p_playlist->p_input = NULL;
 415             PL_UNLOCK
 416
 417             /* Destroy input */
 418             input_DestroyThread( p_input );
 419             /* Unlink current input (_after_ input_DestroyThread for vout
 420              * garbage collector)*/
 421             vlc_object_detach( p_input );
 422
 423             /* Destroy object */
 424             vlc_object_destroy( p_input );
 425             continue;
 426         }
 427         else if( p_playlist->p_input->b_die )
 428         {
 429             /* This input is dying, leave it alone */
 430             ;
 431         }
 432         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 433         {
 434             input_StopThread( p_playlist->p_input );
 435             PL_UNLOCK
 436             continue;
 437         }
 438         else
 439         {
 440             p_playlist->p_input->b_eof = 1;
 441         }
 442
 443         PL_UNLOCK
 444
 445         msleep( INTF_IDLE_SLEEP );
 446     }
 447
 448     /* close all remaining sout */
 449     while( ( p_obj = vlc_object_find( p_playlist,
 450                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 451     {
 452         vlc_object_release( p_obj );
 453         sout_DeleteInstance( (sout_instance_t*)p_obj );
 454     }
 455
 456     /* close all remaining vout */
 457     while( ( p_obj = vlc_object_find( p_playlist,
 458                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 459     {
 460         vlc_object_detach( p_obj );
 461         vlc_object_release( p_obj );
 462         vout_Destroy( (vout_thread_t *)p_obj );
 463     }
 464 }
 465
 466 /** Main loop for preparser queue */
 467 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 468 {
 469     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 470     input_item_t *p_current;
 471     int i_activity;
 472     uint32_t i_m, i_o;
 473
 474     while( !p_playlist->b_die )
 475     {
 476         vlc_mutex_lock( &p_obj->object_lock );
 477         while( p_obj->i_waiting == 0 )
 478         {
 479             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 480             if( p_playlist->b_die )
 481             {
 482                 vlc_mutex_unlock( &p_obj->object_lock );
 483                 return;
 484             }
 485         }
 486
 487         p_current = p_obj->pp_waiting[0];
 488         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 489         vlc_mutex_unlock( &p_obj->object_lock );
 490
 491         PL_LOCK;
 492         if( p_current )
 493         {
 494             vlc_bool_t b_preparsed = VLC_FALSE;
 495             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
 496                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
 497                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
 498                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
 499                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
 500                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
 501                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
 502                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
 503             {
 504                 b_preparsed = VLC_TRUE;
 505                 stats_TimerStart( p_playlist, "Preparse run",
 506                                   STATS_TIMER_PREPARSE );
 507                 PL_UNLOCK;
 508                 input_Preparse( p_playlist, p_current );
 509                 PL_LOCK;
 510                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 511             }
 512             PL_UNLOCK;
 513             if( b_preparsed )
 514             {
 515                 p_current->p_meta->i_status |= ITEM_PREPARSED;
 516                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 517             }
 518             PL_LOCK;
 519
 520             /* If we haven't retrieved enough meta, add to secondary queue
 521              * which will run the "meta fetchers".
 522              * This only checks for meta, not for art
 523              * \todo don't do this for things we won't get meta for, like vids
 524              */
 525             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 526             {
 527                 preparse_item_t p;
 528                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
 529                 p.p_item = p_current;
 530                 p.b_fetch_art = VLC_FALSE;
 531                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 532                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 533                              p_playlist->p_fetcher->i_waiting,
 534                              p_playlist->p_fetcher->i_waiting,
 535                              p );
 536                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 537                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 538             }
 539             /* We already have all needed meta, but we need art right now */
 540             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 541                      EMPTY_STR( p_current->p_meta->psz_arturl ) )
 542             {
 543                 preparse_item_t p;
 544                 PL_DEBUG("meta ok for %s, need to fetch art",
 545                                                          p_current->psz_name );
 546                 p.p_item = p_current;
 547                 p.b_fetch_art = VLC_TRUE;
 548                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 549                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 550                              p_playlist->p_fetcher->i_waiting,
 551                              p_playlist->p_fetcher->i_waiting,
 552                              p );
 553                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 554                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 555             }
 556             else
 557             {
 558                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 559                           p_current->psz_name, p_current->p_meta->psz_arturl );
 560                 vlc_gc_decref( p_current );
 561             }
 562             PL_UNLOCK;
 563         }
 564         else
 565             PL_UNLOCK;
 566
 567         vlc_mutex_lock( &p_obj->object_lock );
 568         i_activity = var_GetInteger( p_playlist, "activity" );
 569         if( i_activity < 0 ) i_activity = 0;
 570         vlc_mutex_unlock( &p_obj->object_lock );
 571         /* Sleep at least 1ms */
 572         msleep( (i_activity+1) * 1000 );
 573     }
 574 }
 575
 576 /** Main loop for secondary preparser queue */
 577 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 578 {
 579     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 580     vlc_bool_t b_fetch_art;
 581     input_item_t *p_item;
 582     int i_activity;
 583
 584     while( !p_playlist->b_die )
 585     {
 586         vlc_mutex_lock( &p_obj->object_lock );
 587         while( p_obj->i_waiting == 0 )
 588         {
 589             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 590             if( p_playlist->b_die )
 591             {
 592                 vlc_mutex_unlock( &p_obj->object_lock );
 593                 return;
 594             }
 595         }
 596
 597         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 598         p_item = p_obj->p_waiting->p_item;
 599         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 600         vlc_mutex_unlock( &p_obj->object_lock );
 601         if( p_item )
 602         {
 603             if( !b_fetch_art )
 604             {
 605                 input_MetaFetch( p_playlist, p_item );
 606                 p_item->p_meta->i_status |= ITEM_META_FETCHED;
 607                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 608                 /*  Fetch right now */
 609                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 610                 {
 611                     vlc_mutex_lock( &p_obj->object_lock );
 612                     preparse_item_t p;
 613                     p.p_item = p_item;
 614                     p.b_fetch_art = VLC_TRUE;
 615                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 616                                  p_playlist->p_fetcher->i_waiting,
 617                                  0, p );
 618                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
 619                     vlc_mutex_unlock( &p_obj->object_lock );
 620                     continue;
 621                 }
 622                 else
 623                     vlc_gc_decref( p_item );
 624             }
 625             else
 626             {
 627                 int i_ret = input_ArtFind( p_playlist, p_item );
 628                 if( i_ret == 1 )
 629                 {
 630                     PL_DEBUG("downloading art for %s", p_item->psz_name );
 631                     if( !input_DownloadAndCacheArt( p_playlist, p_item ) )
 632                         p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 633                     else
 634                         p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 635                 }
 636                 else if( i_ret == 0 ) /* Was in cache */
 637                 {
 638                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
 639                     p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 640                 }
 641                 else
 642                 {
 643                     PL_DEBUG("art not found for %s", p_item->psz_name );
 644                     p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 645                 }
 646                 vlc_gc_decref( p_item );
 647            }
 648         }
 649         vlc_mutex_lock( &p_obj->object_lock );
 650         i_activity = var_GetInteger( p_playlist, "activity" );
 651         if( i_activity < 0 ) i_activity = 0;
 652         vlc_mutex_unlock( &p_obj->object_lock );
 653         /* Sleep at least 1ms */
 654         msleep( (i_activity+1) * 1000 );
 655     }
 656 }
 657
 658 static void VariablesInit( playlist_t *p_playlist )
 659 {
 660     vlc_value_t val;
 661     /* These variables control updates */
 662     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 663     val.b_bool = VLC_TRUE;
 664     var_Set( p_playlist, "intf-change", val );
 665
 666     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 667     val.i_int = -1;
 668     var_Set( p_playlist, "item-change", val );
 669
 670     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 671     val.i_int = -1;
 672     var_Set( p_playlist, "item-deleted", val );
 673
 674     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 675
 676     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 677     val.i_int = -1;
 678     var_Set( p_playlist, "playlist-current", val );
 679
 680     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 681
 682     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 683     val.b_bool = VLC_TRUE;
 684     var_Set( p_playlist, "intf-show", val );
 685
 686     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 687     var_SetInteger( p_playlist, "activity", 0 );
 688
 689     /* Variables to control playback */
 690     var_CreateGetBool( p_playlist, "play-and-stop" );
 691     var_CreateGetBool( p_playlist, "play-and-exit" );
 692     var_CreateGetBool( p_playlist, "random" );
 693     var_CreateGetBool( p_playlist, "repeat" );
 694     var_CreateGetBool( p_playlist, "loop" );
 695
 696     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 697 }