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             /* Unlink current input
 263              * (_after_ input_DestroyThread for vout garbage collector) */
 264             vlc_object_detach( p_input );
 265
 266             /* Destroy object */
 267             vlc_object_destroy( p_input );
 268
 269             PL_LOCK;
 270
 271             p_playlist->gc_date = mdate();
 272             p_playlist->b_cant_sleep = VLC_TRUE;
 273
 274             if( p_playlist->status.p_item->i_flags
 275                 & PLAYLIST_REMOVE_FLAG )
 276             {
 277                  PL_DEBUG( "%s was marked for deletion, deleting",
 278                                  PLI_NAME( p_playlist->status.p_item  ) );
 279                  playlist_ItemDelete( p_playlist->status.p_item );
 280                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 281                      p_playlist->request.p_item = NULL;
 282                  p_playlist->status.p_item = NULL;
 283             }
 284
 285             i_activity= var_GetInteger( p_playlist, "activity") ;
 286             var_SetInteger( p_playlist, "activity", i_activity -
 287                             DEFAULT_INPUT_ACTIVITY );
 288             goto check_input;
 289         }
 290         /* This input is dying, let it do */
 291         else if( p_playlist->p_input->b_die )
 292         {
 293             PL_DEBUG( "dying input" );
 294             PL_UNLOCK;
 295             msleep( 25000 ); // 25 ms
 296             PL_LOCK;
 297             goto check_input;
 298         }
 299         /* This input has finished, ask it to die ! */
 300         else if( p_playlist->p_input->b_error
 301                   || p_playlist->p_input->b_eof )
 302         {
 303             PL_DEBUG( "finished input" );
 304             input_StopThread( p_playlist->p_input );
 305             /* No need to wait here, we'll wait in the p_input->b_die case */
 306             goto check_input;
 307         }
 308         else if( p_playlist->p_input->i_state != INIT_S )
 309         {
 310             PL_UNLOCK;
 311             ObjectGarbageCollector( p_playlist );
 312             PL_LOCK;
 313         }
 314     }
 315     else
 316     {
 317         /* No input. Several cases
 318          *  - No request, running status -> start new item
 319          *  - No request, stopped status -> collect garbage
 320          *  - Request, running requested -> start new item
 321          *  - Request, stopped requested -> collect garbage
 322          */
 323          if( (!p_playlist->request.b_request &&
 324               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 325               ( p_playlist->request.b_request &&
 326                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 327          {
 328              msg_Dbg( p_playlist, "starting new item" );
 329              p_item = playlist_NextItem( p_playlist );
 330
 331              if( p_item == NULL )
 332              {
 333                 msg_Dbg( p_playlist, "nothing to play" );
 334                 if( b_playexit == VLC_TRUE )
 335                 {
 336                     msg_Info( p_playlist, "end of playlist, exiting" );
 337                     p_playlist->p_libvlc->b_die = VLC_TRUE;
 338                 }
 339                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 340                 PL_UNLOCK
 341                 return;
 342              }
 343              playlist_PlayItem( p_playlist, p_item );
 344          }
 345          else
 346          {
 347             p_playlist->status.i_status = PLAYLIST_STOPPED;
 348             if( p_playlist->status.p_item &&
 349                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 350             {
 351                 PL_DEBUG( "deleting item marked for deletion" );
 352                 playlist_ItemDelete( p_playlist->status.p_item );
 353                 p_playlist->status.p_item = NULL;
 354             }
 355
 356             /* Collect garbage */
 357             PL_UNLOCK;
 358             ObjectGarbageCollector( p_playlist );
 359             PL_LOCK;
 360         }
 361     }
 362     PL_UNLOCK
 363 }
 364
 365 /** Playlist dying last loop */
 366 void playlist_LastLoop( playlist_t *p_playlist )
 367 {
 368     vlc_object_t *p_obj;
 369
 370     /* If there is an input, kill it */
 371     while( 1 )
 372     {
 373         PL_LOCK
 374
 375         if( p_playlist->p_input == NULL )
 376         {
 377             PL_UNLOCK
 378             break;
 379         }
 380
 381         if( p_playlist->p_input->b_dead )
 382         {
 383             input_thread_t *p_input;
 384
 385             /* Unlink current input */
 386             p_input = p_playlist->p_input;
 387             p_playlist->p_input = NULL;
 388             PL_UNLOCK
 389
 390             /* Destroy input */
 391             input_DestroyThread( p_input );
 392             /* Unlink current input (_after_ input_DestroyThread for vout
 393              * garbage collector)*/
 394             vlc_object_detach( p_input );
 395
 396             /* Destroy object */
 397             vlc_object_destroy( p_input );
 398             continue;
 399         }
 400         else if( p_playlist->p_input->b_die )
 401         {
 402             /* This input is dying, leave it alone */
 403             ;
 404         }
 405         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 406         {
 407             input_StopThread( p_playlist->p_input );
 408             PL_UNLOCK
 409             continue;
 410         }
 411         else
 412         {
 413             p_playlist->p_input->b_eof = 1;
 414         }
 415
 416         PL_UNLOCK
 417
 418         msleep( INTF_IDLE_SLEEP );
 419     }
 420
 421     /* close all remaining sout */
 422     while( ( p_obj = vlc_object_find( p_playlist,
 423                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 424     {
 425         vlc_object_release( p_obj );
 426         sout_DeleteInstance( (sout_instance_t*)p_obj );
 427     }
 428
 429     /* close all remaining vout */
 430     while( ( p_obj = vlc_object_find( p_playlist,
 431                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 432     {
 433         vlc_object_detach( p_obj );
 434         vlc_object_release( p_obj );
 435         vout_Destroy( (vout_thread_t *)p_obj );
 436     }
 437
 438     while( p_playlist->i_sds )
 439     {
 440         playlist_ServicesDiscoveryRemove( p_playlist,
 441                                           p_playlist->pp_sds[0]->psz_module );
 442     }
 443
 444     playlist_MLDump( p_playlist );
 445
 446     PL_LOCK;
 447     /* Go through all items, and simply free everything without caring
 448      * about the tree structure. Do not decref, it will be done by doing
 449      * the same thing on the input items array */
 450     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 451         free( p_del->pp_children );
 452         free( p_del );
 453     FOREACH_END();
 454     ARRAY_RESET( p_playlist->all_items );
 455
 456     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 457         input_ItemClean( p_del );
 458         free( p_del );
 459     FOREACH_END();
 460     ARRAY_RESET( p_playlist->input_items );
 461
 462     ARRAY_RESET( p_playlist->items );
 463     ARRAY_RESET( p_playlist->current );
 464
 465     PL_UNLOCK;
 466 }
 467
 468 /** Main loop for preparser queue */
 469 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 470 {
 471     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 472     input_item_t *p_current;
 473     int i_activity;
 474     uint32_t i_m, i_o;
 475
 476     while( !p_playlist->b_die )
 477     {
 478         vlc_mutex_lock( &p_obj->object_lock );
 479         while( p_obj->i_waiting == 0 )
 480         {
 481             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 482             if( p_playlist->b_die )
 483             {
 484                 vlc_mutex_unlock( &p_obj->object_lock );
 485                 return;
 486             }
 487         }
 488
 489         p_current = p_obj->pp_waiting[0];
 490         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 491         vlc_mutex_unlock( &p_obj->object_lock );
 492
 493         PL_LOCK;
 494         if( p_current )
 495         {
 496             vlc_bool_t b_preparsed = VLC_FALSE;
 497             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
 498                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
 499                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
 500                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
 501                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
 502                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
 503                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
 504                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
 505             {
 506                 b_preparsed = VLC_TRUE;
 507                 stats_TimerStart( p_playlist, "Preparse run",
 508                                   STATS_TIMER_PREPARSE );
 509                 PL_UNLOCK;
 510                 input_Preparse( p_playlist, p_current );
 511                 PL_LOCK;
 512                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 513             }
 514             PL_UNLOCK;
 515             if( b_preparsed )
 516             {
 517                 p_current->p_meta->i_status |= ITEM_PREPARSED;
 518                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 519             }
 520             PL_LOCK;
 521
 522             /* If we haven't retrieved enough meta, add to secondary queue
 523              * which will run the "meta fetchers".
 524              * This only checks for meta, not for art
 525              * \todo don't do this for things we won't get meta for, like vids
 526              */
 527             if( p_current->p_meta &&
 528                 !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 529             {
 530                 preparse_item_t p;
 531                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
 532                 p.p_item = p_current;
 533                 p.b_fetch_art = VLC_FALSE;
 534                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 535                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 536                              p_playlist->p_fetcher->i_waiting,
 537                              p_playlist->p_fetcher->i_waiting, p);
 538                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 539                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 540             }
 541             /* We already have all needed meta, but we need art right now */
 542             else if( p_current->p_meta &&
 543                      p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 544                      EMPTY_STR( p_current->p_meta->psz_arturl ) )
 545             {
 546                 preparse_item_t p;
 547                 PL_DEBUG("meta ok for %s, need to fetch art",
 548                                                          p_current->psz_name );
 549                 p.p_item = p_current;
 550                 p.b_fetch_art = VLC_TRUE;
 551                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 552                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 553                              p_playlist->p_fetcher->i_waiting,
 554                              p_playlist->p_fetcher->i_waiting, p);
 555                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 556                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 557             }
 558             else
 559             {
 560                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 561                           p_current->psz_name,
 562                           p_current->p_meta ? p_current->p_meta->psz_arturl:
 563                                               "null" );
 564                 vlc_gc_decref( p_current );
 565             }
 566             PL_UNLOCK;
 567         }
 568         else
 569             PL_UNLOCK;
 570
 571         vlc_mutex_lock( &p_obj->object_lock );
 572         i_activity = var_GetInteger( p_playlist, "activity" );
 573         if( i_activity < 0 ) i_activity = 0;
 574         vlc_mutex_unlock( &p_obj->object_lock );
 575         /* Sleep at least 1ms */
 576         msleep( (i_activity+1) * 1000 );
 577     }
 578 }
 579
 580 /** Main loop for secondary preparser queue */
 581 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 582 {
 583     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 584     vlc_bool_t b_fetch_art;
 585     input_item_t *p_item;
 586     int i_activity;
 587
 588     while( !p_playlist->b_die )
 589     {
 590         vlc_mutex_lock( &p_obj->object_lock );
 591         while( p_obj->i_waiting == 0 )
 592         {
 593             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 594             if( p_playlist->b_die )
 595             {
 596                 vlc_mutex_unlock( &p_obj->object_lock );
 597                 return;
 598             }
 599         }
 600
 601         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 602         p_item = p_obj->p_waiting->p_item;
 603         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 604         vlc_mutex_unlock( &p_obj->object_lock );
 605         if( p_item )
 606         {
 607             assert( p_item->p_meta );
 608             if( !b_fetch_art )
 609             {
 610                 input_MetaFetch( p_playlist, p_item );
 611                 p_item->p_meta->i_status |= ITEM_META_FETCHED;
 612                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 613                 /*  Fetch right now */
 614                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 615                 {
 616                     vlc_mutex_lock( &p_obj->object_lock );
 617                     preparse_item_t p;
 618                     p.p_item = p_item;
 619                     p.b_fetch_art = VLC_TRUE;
 620                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 621                                  p_playlist->p_fetcher->i_waiting,
 622                                  0, p );
 623                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
 624                     vlc_mutex_unlock( &p_obj->object_lock );
 625                     continue;
 626                 }
 627                 else
 628                     vlc_gc_decref( p_item );
 629             }
 630             else
 631             {
 632                 int i_ret = input_ArtFind( p_playlist, p_item );
 633                 if( i_ret == 1 )
 634                 {
 635                     PL_DEBUG("downloading art for %s", p_item->psz_name );
 636                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 637                         p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 638                     else {
 639                         p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 640                         var_SetInteger( p_playlist, "item-change",
 641                                         p_item->i_id );
 642                     }
 643                 }
 644                 else if( i_ret == 0 ) /* Was in cache */
 645                 {
 646                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
 647                     p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 648                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 649                 }
 650                 else
 651                 {
 652                     PL_DEBUG("art not found for %s", p_item->psz_name );
 653                     p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 654                 }
 655                 vlc_gc_decref( p_item );
 656            }
 657         }
 658         vlc_mutex_lock( &p_obj->object_lock );
 659         i_activity = var_GetInteger( p_playlist, "activity" );
 660         if( i_activity < 0 ) i_activity = 0;
 661         vlc_mutex_unlock( &p_obj->object_lock );
 662         /* Sleep at least 1ms */
 663         msleep( (i_activity+1) * 1000 );
 664     }
 665 }
 666
 667 static void VariablesInit( playlist_t *p_playlist )
 668 {
 669     vlc_value_t val;
 670     /* These variables control updates */
 671     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 672     val.b_bool = VLC_TRUE;
 673     var_Set( p_playlist, "intf-change", val );
 674
 675     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 676     val.i_int = -1;
 677     var_Set( p_playlist, "item-change", val );
 678
 679     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 680     val.i_int = -1;
 681     var_Set( p_playlist, "item-deleted", val );
 682
 683     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 684
 685     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 686     val.i_int = -1;
 687     var_Set( p_playlist, "playlist-current", val );
 688
 689     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 690
 691     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 692     val.b_bool = VLC_TRUE;
 693     var_Set( p_playlist, "intf-show", val );
 694
 695     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 696     var_SetInteger( p_playlist, "activity", 0 );
 697
 698     /* Variables to control playback */
 699     var_CreateGetBool( p_playlist, "play-and-stop" );
 700     var_CreateGetBool( p_playlist, "play-and-exit" );
 701     var_CreateGetBool( p_playlist, "random" );
 702     var_CreateGetBool( p_playlist, "repeat" );
 703     var_CreateGetBool( p_playlist, "loop" );
 704
 705     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 706 }