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         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 214         vlc_object_detach( p_obj );
 215         vlc_object_release( p_obj );
 216         sout_DeleteInstance( (sout_instance_t*)p_obj );
 217     }
 218     p_playlist->b_cant_sleep = VLC_FALSE;
 219     vlc_mutex_unlock( &p_playlist->gc_lock );
 220 }
 221
 222 /** Main loop for the playlist */
 223 void playlist_MainLoop( playlist_t *p_playlist )
 224 {
 225     playlist_item_t *p_item = NULL;
 226     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 227     PL_LOCK;
 228
 229     if( p_playlist->b_reset_currently_playing &&
 230         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 231     {
 232         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
 233                              p_playlist->status.p_item );
 234         p_playlist->last_rebuild_date = mdate();
 235     }
 236
 237 check_input:
 238     /* If there is an input, check that it doesn't need to die. */
 239     if( p_playlist->p_input )
 240     {
 241         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 242         {
 243             PL_DEBUG( "incoming request - stopping current input" );
 244             input_StopThread( p_playlist->p_input );
 245         }
 246
 247         /* This input is dead. Remove it ! */
 248         if( p_playlist->p_input->b_dead )
 249         {
 250             int i_activity;
 251             input_thread_t *p_input;
 252             PL_DEBUG( "dead input" );
 253
 254             p_input = p_playlist->p_input;
 255             p_playlist->p_input = NULL;
 256
 257             /* Release the playlist lock, because we may get stuck
 258              * in input_DestroyThread() for some time. */
 259             PL_UNLOCK
 260
 261             /* Destroy input */
 262             input_DestroyThread( p_input );
 263
 264             PL_LOCK;
 265
 266             p_playlist->gc_date = mdate();
 267             p_playlist->b_cant_sleep = VLC_TRUE;
 268
 269             if( p_playlist->status.p_item->i_flags
 270                 & PLAYLIST_REMOVE_FLAG )
 271             {
 272                  PL_DEBUG( "%s was marked for deletion, deleting",
 273                                  PLI_NAME( p_playlist->status.p_item  ) );
 274                  playlist_ItemDelete( p_playlist->status.p_item );
 275                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 276                      p_playlist->request.p_item = NULL;
 277                  p_playlist->status.p_item = NULL;
 278             }
 279
 280             i_activity= var_GetInteger( p_playlist, "activity") ;
 281             var_SetInteger( p_playlist, "activity", i_activity -
 282                             DEFAULT_INPUT_ACTIVITY );
 283             goto check_input;
 284         }
 285         /* This input is dying, let it do */
 286         else if( p_playlist->p_input->b_die )
 287         {
 288             PL_DEBUG( "dying input" );
 289             PL_UNLOCK;
 290             msleep( 25000 ); // 25 ms
 291             PL_LOCK;
 292             goto check_input;
 293         }
 294         /* This input has finished, ask it to die ! */
 295         else if( p_playlist->p_input->b_error
 296                   || p_playlist->p_input->b_eof )
 297         {
 298             PL_DEBUG( "finished input" );
 299             input_StopThread( p_playlist->p_input );
 300             /* No need to wait here, we'll wait in the p_input->b_die case */
 301             goto check_input;
 302         }
 303         else if( p_playlist->p_input->i_state != INIT_S )
 304         {
 305             PL_UNLOCK;
 306             ObjectGarbageCollector( p_playlist );
 307             PL_LOCK;
 308         }
 309     }
 310     else
 311     {
 312         /* No input. Several cases
 313          *  - No request, running status -> start new item
 314          *  - No request, stopped status -> collect garbage
 315          *  - Request, running requested -> start new item
 316          *  - Request, stopped requested -> collect garbage
 317          */
 318          if( (!p_playlist->request.b_request &&
 319               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 320               ( p_playlist->request.b_request &&
 321                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 322          {
 323              msg_Dbg( p_playlist, "starting new item" );
 324              p_item = playlist_NextItem( p_playlist );
 325
 326              if( p_item == NULL )
 327              {
 328                 msg_Dbg( p_playlist, "nothing to play" );
 329                 if( b_playexit == VLC_TRUE )
 330                 {
 331                     msg_Info( p_playlist, "end of playlist, exiting" );
 332                     p_playlist->p_libvlc->b_die = VLC_TRUE;
 333                 }
 334                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 335                 PL_UNLOCK
 336                 return;
 337              }
 338              playlist_PlayItem( p_playlist, p_item );
 339          }
 340          else
 341          {
 342             p_playlist->status.i_status = PLAYLIST_STOPPED;
 343             if( p_playlist->status.p_item &&
 344                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 345             {
 346                 PL_DEBUG( "deleting item marked for deletion" );
 347                 playlist_ItemDelete( p_playlist->status.p_item );
 348                 p_playlist->status.p_item = NULL;
 349             }
 350
 351             /* Collect garbage */
 352             PL_UNLOCK;
 353             ObjectGarbageCollector( p_playlist );
 354             PL_LOCK;
 355         }
 356     }
 357     PL_UNLOCK
 358 }
 359
 360 /** Playlist dying last loop */
 361 void playlist_LastLoop( playlist_t *p_playlist )
 362 {
 363     vlc_object_t *p_obj;
 364
 365     /* If there is an input, kill it */
 366     while( 1 )
 367     {
 368         PL_LOCK
 369
 370         if( p_playlist->p_input == NULL )
 371         {
 372             PL_UNLOCK
 373             break;
 374         }
 375
 376         if( p_playlist->p_input->b_dead )
 377         {
 378             input_thread_t *p_input;
 379
 380             /* Unlink current input */
 381             p_input = p_playlist->p_input;
 382             p_playlist->p_input = NULL;
 383             PL_UNLOCK
 384
 385             /* Destroy input */
 386             input_DestroyThread( p_input );
 387             continue;
 388         }
 389         else if( p_playlist->p_input->b_die )
 390         {
 391             /* This input is dying, leave it alone */
 392             ;
 393         }
 394         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 395         {
 396             input_StopThread( p_playlist->p_input );
 397             PL_UNLOCK
 398             continue;
 399         }
 400         else
 401         {
 402             p_playlist->p_input->b_eof = 1;
 403         }
 404
 405         PL_UNLOCK
 406
 407         msleep( INTF_IDLE_SLEEP );
 408     }
 409
 410     /* close all remaining sout */
 411     while( ( p_obj = vlc_object_find( p_playlist,
 412                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 413     {
 414         vlc_object_detach( p_obj );
 415         vlc_object_release( p_obj );
 416         sout_DeleteInstance( (sout_instance_t*)p_obj );
 417     }
 418
 419     /* close all remaining vout */
 420     while( ( p_obj = vlc_object_find( p_playlist,
 421                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 422     {
 423         vlc_object_detach( p_obj );
 424         vlc_object_release( p_obj );
 425         vout_Destroy( (vout_thread_t *)p_obj );
 426     }
 427
 428     while( p_playlist->i_sds )
 429     {
 430         playlist_ServicesDiscoveryRemove( p_playlist,
 431                                           p_playlist->pp_sds[0]->psz_module );
 432     }
 433
 434     playlist_MLDump( p_playlist );
 435
 436     PL_LOCK;
 437     /* Go through all items, and simply free everything without caring
 438      * about the tree structure. Do not decref, it will be done by doing
 439      * the same thing on the input items array */
 440     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 441         free( p_del->pp_children );
 442         free( p_del );
 443     FOREACH_END();
 444     ARRAY_RESET( p_playlist->all_items );
 445
 446     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 447         input_ItemClean( p_del );
 448         free( p_del );
 449     FOREACH_END();
 450     ARRAY_RESET( p_playlist->input_items );
 451
 452     ARRAY_RESET( p_playlist->items );
 453     ARRAY_RESET( p_playlist->current );
 454
 455     PL_UNLOCK;
 456 }
 457
 458 /** Main loop for preparser queue */
 459 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 460 {
 461     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 462     input_item_t *p_current;
 463     int i_activity;
 464     uint32_t i_m, i_o;
 465
 466     while( !p_playlist->b_die )
 467     {
 468         vlc_mutex_lock( &p_obj->object_lock );
 469         while( p_obj->i_waiting == 0 )
 470         {
 471             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 472             if( p_playlist->b_die )
 473             {
 474                 vlc_mutex_unlock( &p_obj->object_lock );
 475                 return;
 476             }
 477         }
 478
 479         p_current = p_obj->pp_waiting[0];
 480         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 481         vlc_mutex_unlock( &p_obj->object_lock );
 482
 483         PL_LOCK;
 484         if( p_current )
 485         {
 486             vlc_bool_t b_preparsed = VLC_FALSE;
 487             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
 488                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
 489                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
 490                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
 491                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
 492                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
 493                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
 494                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
 495             {
 496                 b_preparsed = VLC_TRUE;
 497                 stats_TimerStart( p_playlist, "Preparse run",
 498                                   STATS_TIMER_PREPARSE );
 499                 PL_UNLOCK;
 500                 input_Preparse( p_playlist, p_current );
 501                 PL_LOCK;
 502                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 503             }
 504             PL_UNLOCK;
 505             if( b_preparsed )
 506             {
 507                 p_current->p_meta->i_status |= ITEM_PREPARSED;
 508                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 509             }
 510             PL_LOCK;
 511
 512             /* If we haven't retrieved enough meta, add to secondary queue
 513              * which will run the "meta fetchers".
 514              * This only checks for meta, not for art
 515              * \todo don't do this for things we won't get meta for, like vids
 516              */
 517             if( p_current->p_meta &&
 518                 !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 519             {
 520                 preparse_item_t p;
 521                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
 522                 p.p_item = p_current;
 523                 p.b_fetch_art = VLC_FALSE;
 524                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 525                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 526                              p_playlist->p_fetcher->i_waiting,
 527                              p_playlist->p_fetcher->i_waiting, p);
 528                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 529                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 530             }
 531             /* We already have all needed meta, but we need art right now */
 532             else if( p_current->p_meta &&
 533                      p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 534                      EMPTY_STR( p_current->p_meta->psz_arturl ) )
 535             {
 536                 preparse_item_t p;
 537                 PL_DEBUG("meta ok for %s, need to fetch art",
 538                                                          p_current->psz_name );
 539                 p.p_item = p_current;
 540                 p.b_fetch_art = VLC_TRUE;
 541                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 542                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 543                              p_playlist->p_fetcher->i_waiting,
 544                              p_playlist->p_fetcher->i_waiting, p);
 545                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 546                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 547             }
 548             else
 549             {
 550                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 551                           p_current->psz_name,
 552                           p_current->p_meta ? p_current->p_meta->psz_arturl:
 553                                               "null" );
 554                 vlc_gc_decref( p_current );
 555             }
 556             PL_UNLOCK;
 557         }
 558         else
 559             PL_UNLOCK;
 560
 561         vlc_mutex_lock( &p_obj->object_lock );
 562         i_activity = var_GetInteger( p_playlist, "activity" );
 563         if( i_activity < 0 ) i_activity = 0;
 564         vlc_mutex_unlock( &p_obj->object_lock );
 565         /* Sleep at least 1ms */
 566         msleep( (i_activity+1) * 1000 );
 567     }
 568 }
 569
 570 /** Main loop for secondary preparser queue */
 571 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 572 {
 573     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 574     vlc_bool_t b_fetch_art;
 575     input_item_t *p_item;
 576     int i_activity;
 577
 578     while( !p_playlist->b_die )
 579     {
 580         vlc_mutex_lock( &p_obj->object_lock );
 581         while( p_obj->i_waiting == 0 )
 582         {
 583             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 584             if( p_playlist->b_die )
 585             {
 586                 vlc_mutex_unlock( &p_obj->object_lock );
 587                 return;
 588             }
 589         }
 590
 591         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 592         p_item = p_obj->p_waiting->p_item;
 593         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 594         vlc_mutex_unlock( &p_obj->object_lock );
 595         if( p_item )
 596         {
 597             if( !p_item->p_meta )
 598                 return;
 599             if( !b_fetch_art )
 600             {
 601                 input_MetaFetch( p_playlist, p_item );
 602                 p_item->p_meta->i_status |= ITEM_META_FETCHED;
 603                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 604                 /*  Fetch right now */
 605                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 606                 {
 607                     vlc_mutex_lock( &p_obj->object_lock );
 608                     preparse_item_t p;
 609                     p.p_item = p_item;
 610                     p.b_fetch_art = VLC_TRUE;
 611                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 612                                  p_playlist->p_fetcher->i_waiting,
 613                                  0, p );
 614                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
 615                     vlc_mutex_unlock( &p_obj->object_lock );
 616                     continue;
 617                 }
 618                 else
 619                     vlc_gc_decref( p_item );
 620             }
 621             else
 622             {
 623                 int i_ret = input_ArtFind( p_playlist, p_item );
 624                 if( i_ret == 1 )
 625                 {
 626                     PL_DEBUG("downloading art for %s", p_item->psz_name );
 627                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 628                         p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 629                     else {
 630                         p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 631                         var_SetInteger( p_playlist, "item-change",
 632                                         p_item->i_id );
 633                     }
 634                 }
 635                 else if( i_ret == 0 ) /* Was in cache */
 636                 {
 637                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
 638                     p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 639                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 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 }