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 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc_vout.h>
  31 #include <vlc_sout.h>
  32 #include <vlc_playlist.h>
  33 #include <vlc_interface.h>
  34 #include "playlist_internal.h"
  35 #include "stream_output/stream_output.h" /* sout_DeleteInstance */
  36
  37 /*****************************************************************************
  38  * Local prototypes
  39  *****************************************************************************/
  40 static void VariablesInit( playlist_t *p_playlist );
  41 static void playlist_Destructor( vlc_object_t * p_this );
  42
  43 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  44                            vlc_value_t oldval, vlc_value_t newval, void *a )
  45 {
  46     (void)psz_cmd; (void)oldval; (void)newval; (void)a;
  47
  48     ((playlist_t*)p_this)->b_reset_currently_playing = true;
  49     playlist_Signal( ((playlist_t*)p_this) );
  50     return VLC_SUCCESS;
  51 }
  52
  53 /**
  54  * Create playlist
  55  *
  56  * Create a playlist structure.
  57  * \param p_parent the vlc object that is to be the parent of this playlist
  58  * \return a pointer to the created playlist, or NULL on error
  59  */
  60 playlist_t * playlist_Create( vlc_object_t *p_parent )
  61 {
  62     static const char playlist_name[] = "playlist";
  63     playlist_t *p_playlist;
  64     bool b_save;
  65
  66     /* Allocate structure */
  67     p_playlist = vlc_custom_create( p_parent, sizeof( *p_playlist ),
  68                                     VLC_OBJECT_PLAYLIST, playlist_name );
  69     if( !p_playlist )
  70     {
  71         msg_Err( p_parent, "out of memory" );
  72         return NULL;
  73     }
  74
  75     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
  76
  77     p_parent->p_libvlc->p_playlist = p_playlist;
  78
  79     VariablesInit( p_playlist );
  80
  81     /* Initialise data structures */
  82     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  83     p_playlist->i_last_playlist_id = 0;
  84     p_playlist->p_input = NULL;
  85
  86     p_playlist->gc_date = 0;
  87     p_playlist->b_cant_sleep = false;
  88
  89     ARRAY_INIT( p_playlist->items );
  90     ARRAY_INIT( p_playlist->all_items );
  91     ARRAY_INIT( p_playlist->current );
  92
  93     p_playlist->i_current_index = 0;
  94     p_playlist->b_reset_currently_playing = true;
  95     p_playlist->last_rebuild_date = 0;
  96
  97     p_playlist->b_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  98
  99     p_playlist->b_doing_ml = false;
 100
 101     p_playlist->b_auto_preparse =
 102                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
 103
 104     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 105                                     0, NULL );
 106     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 107                                     0, p_playlist->p_root_category->p_input );
 108
 109     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 110         return NULL;
 111
 112     /* Create playlist and media library */
 113     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 114                             &p_playlist->p_local_category,
 115                             &p_playlist->p_local_onelevel, false );
 116
 117     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 118     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 119
 120     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 121         !p_playlist->p_local_category->p_input ||
 122         !p_playlist->p_local_onelevel->p_input )
 123         return NULL;
 124
 125     if( config_GetInt( p_playlist, "media-library") )
 126     {
 127         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 128                             &p_playlist->p_ml_category,
 129                             &p_playlist->p_ml_onelevel, false );
 130
 131         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 132             return NULL;
 133
 134         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 135         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 136     }
 137     else
 138     {
 139         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 140     }
 141
 142     /* Initial status */
 143     p_playlist->status.p_item = NULL;
 144     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 145     p_playlist->request.b_request = false;
 146     p_playlist->status.i_status = PLAYLIST_STOPPED;
 147
 148     p_playlist->i_sort = SORT_ID;
 149     p_playlist->i_order = ORDER_NORMAL;
 150
 151
 152     b_save = p_playlist->b_auto_preparse;
 153     p_playlist->b_auto_preparse = false;
 154     playlist_MLLoad( p_playlist );
 155     p_playlist->b_auto_preparse = true;
 156
 157     vlc_object_set_destructor( p_playlist, playlist_Destructor );
 158
 159     return p_playlist;
 160 }
 161
 162 /**
 163  * Destroy playlist
 164  *
 165  * Destroy a playlist structure.
 166  * \param p_playlist the playlist object
 167  * \return nothing
 168  */
 169 void playlist_Destroy( playlist_t *p_playlist )
 170 {
 171     /* XXX: should go in the playlist destructor */
 172     var_Destroy( p_playlist, "intf-change" );
 173     var_Destroy( p_playlist, "item-change" );
 174     var_Destroy( p_playlist, "playlist-current" );
 175     var_Destroy( p_playlist, "intf-popupmenu" );
 176     var_Destroy( p_playlist, "intf-show" );
 177     var_Destroy( p_playlist, "play-and-stop" );
 178     var_Destroy( p_playlist, "play-and-exit" );
 179     var_Destroy( p_playlist, "random" );
 180     var_Destroy( p_playlist, "repeat" );
 181     var_Destroy( p_playlist, "loop" );
 182     var_Destroy( p_playlist, "activity" );
 183
 184     vlc_object_release( p_playlist );
 185 }
 186
 187 static void playlist_Destructor( vlc_object_t * p_this )
 188 {
 189     playlist_t * p_playlist = (playlist_t *)p_this;
 190
 191     // Kill preparser
 192     if( p_playlist->p_preparse )
 193     {
 194         vlc_object_release( p_playlist->p_preparse );
 195     }
 196
 197     // Kill meta fetcher
 198     if( p_playlist->p_fetcher )
 199     {
 200         vlc_object_release( p_playlist->p_fetcher );
 201     }
 202 }
 203
 204 /* Destroy remaining objects */
 205 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
 206 {
 207     vlc_object_t *p_obj;
 208
 209     if( !b_force )
 210     {
 211         if( mdate() - p_playlist->gc_date < 1000000 )
 212         {
 213             p_playlist->b_cant_sleep = true;
 214             return;
 215         }
 216         else if( p_playlist->gc_date == 0 )
 217             return;
 218     }
 219
 220     vlc_mutex_lock( &p_playlist->gc_lock );
 221     while( ( p_obj = vlc_object_find( p_playlist->p_libvlc, VLC_OBJECT_VOUT,
 222                                                   FIND_CHILD ) ) )
 223     {
 224         if( p_obj->p_parent != VLC_OBJECT(p_playlist->p_libvlc) )
 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(p_playlist) )
 238         {
 239             vlc_object_release( p_obj );
 240             break;
 241         }
 242         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 243         vlc_object_detach( p_obj );
 244         vlc_object_release( p_obj );
 245         sout_DeleteInstance( (sout_instance_t*)p_obj );
 246     }
 247     p_playlist->b_cant_sleep = false;
 248     vlc_mutex_unlock( &p_playlist->gc_lock );
 249 }
 250
 251 /**
 252  * Main loop
 253  *
 254  * Main loop for the playlist
 255  * \param p_playlist the playlist object
 256  * \return nothing
 257  */
 258 void playlist_MainLoop( playlist_t *p_playlist )
 259 {
 260     playlist_item_t *p_item = NULL;
 261     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 262     PL_LOCK;
 263
 264     if( p_playlist->b_reset_currently_playing &&
 265         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 266     {
 267         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 268                              p_playlist->status.p_item );
 269         p_playlist->last_rebuild_date = mdate();
 270     }
 271
 272 check_input:
 273     /* If there is an input, check that it doesn't need to die. */
 274     if( p_playlist->p_input )
 275     {
 276         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 277         {
 278             PL_DEBUG( "incoming request - stopping current input" );
 279             input_StopThread( p_playlist->p_input );
 280         }
 281
 282         /* This input is dead. Remove it ! */
 283         if( p_playlist->p_input->b_dead )
 284         {
 285             int i_activity;
 286             input_thread_t *p_input;
 287             PL_DEBUG( "dead input" );
 288
 289             p_input = p_playlist->p_input;
 290             p_playlist->p_input = NULL;
 291
 292             /* Release the playlist lock, because we may get stuck
 293              * in vlc_object_release() for some time. */
 294             PL_UNLOCK;
 295
 296             /* Destroy input */
 297             vlc_object_release( p_input );
 298
 299             PL_LOCK;
 300
 301             p_playlist->gc_date = mdate();
 302             p_playlist->b_cant_sleep = true;
 303
 304             if( p_playlist->status.p_item->i_flags
 305                 & PLAYLIST_REMOVE_FLAG )
 306             {
 307                  PL_DEBUG( "%s was marked for deletion, deleting",
 308                                  PLI_NAME( p_playlist->status.p_item  ) );
 309                  playlist_ItemDelete( p_playlist->status.p_item );
 310                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 311                      p_playlist->request.p_item = NULL;
 312                  p_playlist->status.p_item = NULL;
 313             }
 314
 315             i_activity= var_GetInteger( p_playlist, "activity" );
 316             var_SetInteger( p_playlist, "activity", i_activity -
 317                             DEFAULT_INPUT_ACTIVITY );
 318             goto check_input;
 319         }
 320         /* This input is dying, let it do */
 321         else if( p_playlist->p_input->b_die )
 322         {
 323             PL_DEBUG( "dying input" );
 324             PL_UNLOCK;
 325             msleep( INTF_IDLE_SLEEP );
 326             PL_LOCK;
 327             goto check_input;
 328         }
 329         /* This input has finished, ask it to die ! */
 330         else if( p_playlist->p_input->b_error
 331                   || p_playlist->p_input->b_eof )
 332         {
 333             PL_DEBUG( "finished input" );
 334             input_StopThread( p_playlist->p_input );
 335             /* No need to wait here, we'll wait in the p_input->b_die case */
 336             goto check_input;
 337         }
 338         else if( p_playlist->p_input->i_state != INIT_S )
 339         {
 340             PL_UNLOCK;
 341             ObjectGarbageCollector( p_playlist, false );
 342             PL_LOCK;
 343         }
 344     }
 345     else
 346     {
 347         /* No input. Several cases
 348          *  - No request, running status -> start new item
 349          *  - No request, stopped status -> collect garbage
 350          *  - Request, running requested -> start new item
 351          *  - Request, stopped requested -> collect garbage
 352         */
 353         if( 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                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 362                 PL_UNLOCK;
 363
 364                 if( b_playexit == true )
 365                 {
 366                     msg_Info( p_playlist, "end of playlist, exiting" );
 367                     vlc_object_kill( p_playlist->p_libvlc );
 368                 }
 369                 ObjectGarbageCollector( p_playlist, true );
 370                 return;
 371              }
 372              playlist_PlayItem( p_playlist, p_item );
 373          }
 374          else
 375          {
 376             const bool b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 377
 378             p_playlist->status.i_status = PLAYLIST_STOPPED;
 379             if( p_playlist->status.p_item &&
 380                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 381             {
 382                 PL_DEBUG( "deleting item marked for deletion" );
 383                 playlist_ItemDelete( p_playlist->status.p_item );
 384                 p_playlist->status.p_item = NULL;
 385             }
 386
 387             /* Collect garbage */
 388             PL_UNLOCK;
 389             ObjectGarbageCollector( p_playlist, b_gc_forced );
 390             PL_LOCK;
 391         }
 392     }
 393     PL_UNLOCK;
 394 }
 395
 396 /**
 397  * Last loop
 398  *
 399  * The playlist is dying so do the last loop
 400  * \param p_playlist the playlist object
 401  * \return nothing
 402 */
 403 void playlist_LastLoop( playlist_t *p_playlist )
 404 {
 405     vlc_object_t *p_obj;
 406
 407     /* If there is an input, kill it */
 408     while( 1 )
 409     {
 410         PL_LOCK;
 411         if( p_playlist->p_input == NULL )
 412         {
 413             PL_UNLOCK;
 414             break;
 415         }
 416
 417         if( p_playlist->p_input->b_dead )
 418         {
 419             input_thread_t *p_input;
 420
 421             /* Unlink current input */
 422             p_input = p_playlist->p_input;
 423             p_playlist->p_input = NULL;
 424             PL_UNLOCK;
 425
 426             /* Destroy input */
 427             vlc_object_release( p_input );
 428             continue;
 429         }
 430         else if( p_playlist->p_input->b_die )
 431         {
 432             /* This input is dying, leave it alone */
 433             ;
 434         }
 435         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 436         {
 437             input_StopThread( p_playlist->p_input );
 438             PL_UNLOCK;
 439             continue;
 440         }
 441         else
 442         {
 443             p_playlist->p_input->b_eof = 1;
 444         }
 445         PL_UNLOCK;
 446
 447         msleep( INTF_IDLE_SLEEP );
 448     }
 449
 450     /* close all remaining sout */
 451     while( ( p_obj = vlc_object_find( p_playlist,
 452                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 453     {
 454         vlc_object_detach( p_obj );
 455         vlc_object_release( p_obj );
 456         sout_DeleteInstance( (sout_instance_t*)p_obj );
 457     }
 458
 459     /* close all remaining vout */
 460     while( ( p_obj = vlc_object_find( p_playlist,
 461                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 462     {
 463         vlc_object_detach( p_obj );
 464         vlc_object_release( p_obj );
 465         vout_Destroy( (vout_thread_t *)p_obj );
 466     }
 467
 468     while( p_playlist->i_sds )
 469     {
 470         playlist_ServicesDiscoveryRemove( p_playlist,
 471                                           p_playlist->pp_sds[0]->p_sd->psz_module );
 472     }
 473
 474     playlist_MLDump( p_playlist );
 475
 476     PL_LOCK;
 477     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 478         free( p_del->pp_children );
 479         vlc_gc_decref( p_del->p_input );
 480         free( p_del );
 481     FOREACH_END();
 482     ARRAY_RESET( p_playlist->all_items );
 483
 484     ARRAY_RESET( p_playlist->items );
 485     ARRAY_RESET( p_playlist->current );
 486
 487     PL_UNLOCK;
 488 }
 489
 490 /**
 491  * Preparse loop
 492  *
 493  * Main loop for preparser queue
 494  * \param p_obj items to preparse
 495  * \return nothing
 496  */
 497 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 498 {
 499     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 500     input_item_t *p_current;
 501     int i_activity;
 502     uint32_t i_m, i_o;
 503
 504     while( !p_playlist->b_die )
 505     {
 506         vlc_object_lock( p_obj );
 507         while( p_obj->i_waiting == 0 )
 508         {
 509             if( vlc_object_wait( p_obj ) || p_playlist->b_die )
 510             {
 511                 vlc_object_unlock( p_obj );
 512                 return;
 513             }
 514         }
 515
 516         p_current = p_obj->pp_waiting[0];
 517         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 518         vlc_object_unlock( p_obj );
 519
 520         PL_LOCK;
 521         if( p_current )
 522         {
 523             if( p_current->i_type == ITEM_TYPE_FILE )
 524             {
 525                 stats_TimerStart( p_playlist, "Preparse run",
 526                                   STATS_TIMER_PREPARSE );
 527                 /* Do not preparse if it is already done (like by playing it) */
 528                 if( !input_item_IsPreparsed( p_current ) )
 529                 {
 530                     PL_UNLOCK;
 531                     input_Preparse( p_playlist, p_current );
 532                     PL_LOCK;
 533                 }
 534                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 535                 PL_UNLOCK;
 536                 input_item_SetPreparsed( p_current, true );
 537                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 538                 PL_LOCK;
 539             }
 540             /* If we haven't retrieved enough meta, add to secondary queue
 541              * which will run the "meta fetchers".
 542              * This only checks for meta, not for art
 543              * \todo don't do this for things we won't get meta for, like vids
 544              */
 545             char *psz_arturl = input_item_GetArtURL( p_current );
 546             char *psz_name = input_item_GetName( p_current );
 547             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 548             {
 549                 preparse_item_t p;
 550                 PL_DEBUG( "need to fetch meta for %s", p_current->psz_name );
 551                 p.p_item = p_current;
 552                 p.b_fetch_art = false;
 553                 vlc_object_lock( p_playlist->p_fetcher );
 554                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 555                              p_playlist->p_fetcher->i_waiting,
 556                              p_playlist->p_fetcher->i_waiting, p);
 557                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 558                 vlc_object_unlock( p_playlist->p_fetcher );
 559             }
 560             /* We already have all needed meta, but we need art right now */
 561             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 562                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 563             {
 564                 preparse_item_t p;
 565                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 566                 p.p_item = p_current;
 567                 p.b_fetch_art = true;
 568                 vlc_object_lock( p_playlist->p_fetcher );
 569                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 570                              p_playlist->p_fetcher->i_waiting,
 571                              p_playlist->p_fetcher->i_waiting, p);
 572                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 573                 vlc_object_unlock( p_playlist->p_fetcher );
 574             }
 575             else
 576             {
 577                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 578                           psz_name, psz_arturl );
 579                 vlc_gc_decref( p_current );
 580             }
 581             free( psz_name );
 582             free( psz_arturl );
 583             PL_UNLOCK;
 584         }
 585         else
 586             PL_UNLOCK;
 587
 588         vlc_object_lock( p_obj );
 589         i_activity = var_GetInteger( p_playlist, "activity" );
 590         if( i_activity < 0 ) i_activity = 0;
 591         vlc_object_unlock( p_obj );
 592         /* Sleep at least 1ms */
 593         msleep( (i_activity+1) * 1000 );
 594     }
 595 }
 596
 597 /**
 598  * Fetcher loop
 599  *
 600  * Main loop for secondary preparser queue
 601  * \param p_obj items to preparse
 602  * \return nothing
 603  */
 604 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 605 {
 606     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 607     bool b_fetch_art;
 608     input_item_t *p_item;
 609     int i_activity;
 610
 611     while( !p_playlist->b_die )
 612     {
 613         vlc_mutex_lock( &p_obj->object_lock );
 614         while( p_obj->i_waiting == 0 )
 615         {
 616             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 617             if( p_playlist->b_die )
 618             {
 619                 vlc_mutex_unlock( &p_obj->object_lock );
 620                 return;
 621             }
 622         }
 623
 624         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 625         p_item = p_obj->p_waiting->p_item;
 626         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 627         vlc_mutex_unlock( &p_obj->object_lock );
 628         if( p_item )
 629         {
 630             if( !b_fetch_art )
 631             {
 632                 /* If the user doesn't want us to fetch meta automatically
 633                  * abort here. */
 634                 if( p_playlist->p_fetcher->b_fetch_meta )
 635                 {
 636                     input_MetaFetch( p_playlist, p_item );
 637                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 638                 }
 639
 640                 /*  Fetch right now */
 641                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 642                 {
 643                     vlc_mutex_lock( &p_obj->object_lock );
 644                     preparse_item_t p;
 645                     p.p_item = p_item;
 646                     p.b_fetch_art = true;
 647                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 648                                  p_playlist->p_fetcher->i_waiting,
 649                                  0, p );
 650                     PL_DEBUG( "meta fetched for %s, get art", p_item->psz_name );
 651                     vlc_mutex_unlock( &p_obj->object_lock );
 652                     continue;
 653                 }
 654                 else
 655                     vlc_gc_decref( p_item );
 656             }
 657             else
 658             {
 659                 int i_ret;
 660
 661                 /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 662                  * (This can happen if we fetch art on play)
 663                  * FIXME this doesn't work if we need to fetch meta before art ... */
 664                 for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 665                 {
 666                     bool b_break;
 667                     PL_LOCK;
 668                     b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 669                                 p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 670                     PL_UNLOCK;
 671                     if( b_break )
 672                         break;
 673                     msleep( 50000 );
 674                 }
 675
 676                 i_ret = input_ArtFind( p_playlist, p_item );
 677                 if( i_ret == 1 )
 678                 {
 679                     PL_DEBUG( "downloading art for %s", p_item->psz_name );
 680                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 681                         input_item_SetArtNotFound( p_item, true );
 682                     else {
 683                         input_item_SetArtFetched( p_item, true );
 684                         var_SetInteger( p_playlist, "item-change",
 685                                         p_item->i_id );
 686                     }
 687                 }
 688                 else if( i_ret == 0 ) /* Was in cache */
 689                 {
 690                     PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 691                     input_item_SetArtFetched( p_item, true );
 692                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 693                 }
 694                 else
 695                 {
 696                     PL_DEBUG( "art not found for %s", p_item->psz_name );
 697                     input_item_SetArtNotFound( p_item, true );
 698                 }
 699                 vlc_gc_decref( p_item );
 700            }
 701         }
 702         vlc_object_lock( p_obj );
 703         i_activity = var_GetInteger( p_playlist, "activity" );
 704         if( i_activity < 0 ) i_activity = 0;
 705         vlc_object_unlock( p_obj );
 706         /* Sleep at least 1ms */
 707         msleep( (i_activity+1) * 1000 );
 708     }
 709 }
 710
 711 static void VariablesInit( playlist_t *p_playlist )
 712 {
 713     vlc_value_t val;
 714     /* These variables control updates */
 715     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 716     val.b_bool = true;
 717     var_Set( p_playlist, "intf-change", val );
 718
 719     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 720     val.i_int = -1;
 721     var_Set( p_playlist, "item-change", val );
 722
 723     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 724     val.i_int = -1;
 725     var_Set( p_playlist, "item-deleted", val );
 726
 727     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 728
 729     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 730     val.i_int = -1;
 731     var_Set( p_playlist, "playlist-current", val );
 732
 733     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 734
 735     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 736     val.b_bool = true;
 737     var_Set( p_playlist, "intf-show", val );
 738
 739     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 740     var_SetInteger( p_playlist, "activity", 0 );
 741
 742     /* Variables to control playback */
 743     var_CreateGetBool( p_playlist, "play-and-stop" );
 744     var_CreateGetBool( p_playlist, "play-and-exit" );
 745     var_CreateGetBool( p_playlist, "random" );
 746     var_CreateGetBool( p_playlist, "repeat" );
 747     var_CreateGetBool( p_playlist, "loop" );
 748
 749     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 750 }