git.sesse.net Git - vlc/blob - src/playlist/engine.c

   1 /*****************************************************************************
   2  * engine.c : Run the playlist and handle its control
   3  *****************************************************************************
   4  * Copyright (C) 1999-2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Clément Stenac <zorglub@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #include <vlc/vlc.h>
  26 #include <vlc_vout.h>
  27 #include <vlc_sout.h>
  28 #include <vlc_playlist.h>
  29 #include <vlc_interface.h>
  30 #include "playlist_internal.h"
  31 #include "stream_output/stream_output.h" /* sout_DeleteInstance */
  32
  33 /*****************************************************************************
  34  * Local prototypes
  35  *****************************************************************************/
  36 static void VariablesInit( playlist_t *p_playlist );
  37
  38 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  39                            vlc_value_t oldval, vlc_value_t newval, void *a )
  40 {
  41     (void)psz_cmd; (void)oldval; (void)newval; (void)a;
  42
  43     ((playlist_t*)p_this)->b_reset_currently_playing = VLC_TRUE;
  44     playlist_Signal( ((playlist_t*)p_this) );
  45     return VLC_SUCCESS;
  46 }
  47
  48 /**
  49  * Create playlist
  50  *
  51  * Create a playlist structure.
  52  * \param p_parent the vlc object that is to be the parent of this playlist
  53  * \return a pointer to the created playlist, or NULL on error
  54  */
  55 playlist_t * playlist_Create( vlc_object_t *p_parent )
  56 {
  57     playlist_t *p_playlist;
  58     vlc_bool_t b_save;
  59     int i_tree;
  60
  61     /* Allocate structure */
  62     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  63     if( !p_playlist )
  64     {
  65         msg_Err( p_parent, "out of memory" );
  66         return NULL;
  67     }
  68     p_parent->p_libvlc->p_playlist = p_playlist;
  69
  70     VariablesInit( p_playlist );
  71
  72     /* Initialise data structures */
  73     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  74     p_playlist->i_last_playlist_id = 0;
  75     p_playlist->i_last_input_id = 0;
  76     p_playlist->p_input = NULL;
  77
  78     p_playlist->gc_date = 0;
  79     p_playlist->b_cant_sleep = VLC_FALSE;
  80
  81     ARRAY_INIT( p_playlist->items );
  82     ARRAY_INIT( p_playlist->all_items );
  83     ARRAY_INIT( p_playlist->input_items );
  84     ARRAY_INIT( p_playlist->current );
  85
  86     p_playlist->i_current_index = 0;
  87     p_playlist->b_reset_currently_playing = VLC_TRUE;
  88     p_playlist->last_rebuild_date = 0;
  89
  90     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  91     p_playlist->b_always_tree = (i_tree == 1);
  92     p_playlist->b_never_tree = (i_tree == 2);
  93
  94     p_playlist->b_doing_ml = VLC_FALSE;
  95
  96     p_playlist->b_auto_preparse =
  97                         var_CreateGetBool( p_playlist, "auto-preparse") ;
  98
  99     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 100                                                        0 );
 101     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 102                                                        0 );
 103
 104     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 105         return NULL;
 106
 107     /* Create playlist and media library */
 108     p_playlist->p_local_category = playlist_NodeCreate( p_playlist,
 109                               _( "Playlist" ),p_playlist->p_root_category, 0 );
 110     p_playlist->p_local_onelevel =  playlist_NodeCreate( p_playlist,
 111                               _( "Playlist" ), p_playlist->p_root_onelevel, 0 );
 112     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 113     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 114
 115     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 116         !p_playlist->p_local_category->p_input ||
 117         !p_playlist->p_local_onelevel->p_input )
 118         return NULL;
 119
 120     /* Link the nodes together. Todo: actually create them from the same input*/
 121     p_playlist->p_local_onelevel->p_input->i_id =
 122         p_playlist->p_local_category->p_input->i_id;
 123
 124     if( config_GetInt( p_playlist, "media-library") )
 125     {
 126         p_playlist->p_ml_category =   playlist_NodeCreate( p_playlist,
 127                          _( "Media Library" ), p_playlist->p_root_category, 0 );
 128         p_playlist->p_ml_onelevel =  playlist_NodeCreate( p_playlist,
 129                          _( "Media Library" ), p_playlist->p_root_onelevel, 0 );
 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         p_playlist->p_ml_onelevel->p_input->i_id =
 137              p_playlist->p_ml_category->p_input->i_id;
 138
 139     }
 140     else
 141     {
 142         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 143     }
 144
 145     /* Initial status */
 146     p_playlist->status.p_item = NULL;
 147     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 148     p_playlist->request.b_request = VLC_FALSE;
 149     p_playlist->status.i_status = PLAYLIST_STOPPED;
 150
 151     p_playlist->i_sort = SORT_ID;
 152     p_playlist->i_order = ORDER_NORMAL;
 153
 154     b_save = p_playlist->b_auto_preparse;
 155     p_playlist->b_auto_preparse = VLC_FALSE;
 156     playlist_MLLoad( p_playlist );
 157     p_playlist->b_auto_preparse = VLC_TRUE;
 158     return p_playlist;
 159 }
 160
 161 void playlist_Destroy( playlist_t *p_playlist )
 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     vlc_mutex_destroy( &p_playlist->gc_lock );
 176     vlc_object_detach( p_playlist );
 177     vlc_object_destroy( p_playlist );
 178 }
 179
 180 /* Destroy remaining objects */
 181 static void ObjectGarbageCollector( playlist_t *p_playlist, vlc_bool_t b_force )
 182 {
 183     vlc_object_t *p_obj;
 184
 185     if( !b_force )
 186     {
 187         if( mdate() - p_playlist->gc_date < 1000000 )
 188         {
 189             p_playlist->b_cant_sleep = VLC_TRUE;
 190             return;
 191         }
 192         else if( p_playlist->gc_date == 0 )
 193             return;
 194     }
 195
 196     vlc_mutex_lock( &p_playlist->gc_lock );
 197     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 198                                                   FIND_CHILD ) ) )
 199     {
 200         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 201         {
 202             vlc_object_release( p_obj );
 203             break;
 204         }
 205         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 206         vlc_object_detach( p_obj );
 207         vlc_object_release( p_obj );
 208         vout_Destroy( (vout_thread_t *)p_obj );
 209     }
 210     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 211                                                   FIND_CHILD ) ) )
 212     {
 213         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 214         {
 215             vlc_object_release( p_obj );
 216             break;
 217         }
 218         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 219         vlc_object_detach( p_obj );
 220         vlc_object_release( p_obj );
 221         sout_DeleteInstance( (sout_instance_t*)p_obj );
 222     }
 223     p_playlist->b_cant_sleep = VLC_FALSE;
 224     vlc_mutex_unlock( &p_playlist->gc_lock );
 225 }
 226
 227 /** Main loop for the playlist */
 228 void playlist_MainLoop( playlist_t *p_playlist )
 229 {
 230     playlist_item_t *p_item = NULL;
 231     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 232     PL_LOCK;
 233
 234     if( p_playlist->b_reset_currently_playing &&
 235         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 236     {
 237         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
 238                              p_playlist->status.p_item );
 239         p_playlist->last_rebuild_date = mdate();
 240     }
 241
 242 check_input:
 243     /* If there is an input, check that it doesn't need to die. */
 244     if( p_playlist->p_input )
 245     {
 246         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 247         {
 248             PL_DEBUG( "incoming request - stopping current input" );
 249             input_StopThread( p_playlist->p_input );
 250         }
 251
 252         /* This input is dead. Remove it ! */
 253         if( p_playlist->p_input->b_dead )
 254         {
 255             int i_activity;
 256             input_thread_t *p_input;
 257             PL_DEBUG( "dead input" );
 258
 259             p_input = p_playlist->p_input;
 260             p_playlist->p_input = NULL;
 261
 262             /* Release the playlist lock, because we may get stuck
 263              * in input_DestroyThread() for some time. */
 264             PL_UNLOCK
 265
 266             /* Destroy input */
 267             input_DestroyThread( 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, VLC_FALSE );
 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                     vlc_object_kill( p_playlist->p_libvlc );
 338                 }
 339                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 340                 PL_UNLOCK
 341
 342                 ObjectGarbageCollector( p_playlist, VLC_TRUE );
 343                 return;
 344              }
 345              playlist_PlayItem( p_playlist, p_item );
 346          }
 347          else
 348          {
 349             const vlc_bool_t b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 350
 351             p_playlist->status.i_status = PLAYLIST_STOPPED;
 352             if( p_playlist->status.p_item &&
 353                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 354             {
 355                 PL_DEBUG( "deleting item marked for deletion" );
 356                 playlist_ItemDelete( p_playlist->status.p_item );
 357                 p_playlist->status.p_item = NULL;
 358             }
 359
 360             /* Collect garbage */
 361             PL_UNLOCK;
 362             ObjectGarbageCollector( p_playlist, b_gc_forced );
 363             PL_LOCK;
 364         }
 365     }
 366     PL_UNLOCK
 367 }
 368
 369 /** Playlist dying last loop */
 370 void playlist_LastLoop( playlist_t *p_playlist )
 371 {
 372     vlc_object_t *p_obj;
 373
 374     /* If there is an input, kill it */
 375     while( 1 )
 376     {
 377         PL_LOCK
 378
 379         if( p_playlist->p_input == NULL )
 380         {
 381             PL_UNLOCK
 382             break;
 383         }
 384
 385         if( p_playlist->p_input->b_dead )
 386         {
 387             input_thread_t *p_input;
 388
 389             /* Unlink current input */
 390             p_input = p_playlist->p_input;
 391             p_playlist->p_input = NULL;
 392             PL_UNLOCK
 393
 394             /* Destroy input */
 395             input_DestroyThread( p_input );
 396             continue;
 397         }
 398         else if( p_playlist->p_input->b_die )
 399         {
 400             /* This input is dying, leave it alone */
 401             ;
 402         }
 403         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 404         {
 405             input_StopThread( p_playlist->p_input );
 406             PL_UNLOCK
 407             continue;
 408         }
 409         else
 410         {
 411             p_playlist->p_input->b_eof = 1;
 412         }
 413
 414         PL_UNLOCK
 415
 416         msleep( INTF_IDLE_SLEEP );
 417     }
 418
 419     /* close all remaining sout */
 420     while( ( p_obj = vlc_object_find( p_playlist,
 421                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 422     {
 423         vlc_object_detach( p_obj );
 424         vlc_object_release( p_obj );
 425         sout_DeleteInstance( (sout_instance_t*)p_obj );
 426     }
 427
 428     /* close all remaining vout */
 429     while( ( p_obj = vlc_object_find( p_playlist,
 430                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 431     {
 432         vlc_object_detach( p_obj );
 433         vlc_object_release( p_obj );
 434         vout_Destroy( (vout_thread_t *)p_obj );
 435     }
 436
 437     while( p_playlist->i_asds )
 438     {
 439         playlist_ServicesDiscoveryRemove( p_playlist,
 440                                           p_playlist->pp_asds[0]->p_sd->psz_module );
 441     }
 442
 443     playlist_MLDump( p_playlist );
 444
 445     PL_LOCK;
 446     /* Go through all items, and simply free everything without caring
 447      * about the tree structure. Do not decref, it will be done by doing
 448      * the same thing on the input items array */
 449     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 450         free( p_del->pp_children );
 451         free( p_del );
 452     FOREACH_END();
 453     ARRAY_RESET( p_playlist->all_items );
 454
 455     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 456         input_ItemClean( p_del );
 457         free( p_del );
 458     FOREACH_END();
 459     ARRAY_RESET( p_playlist->input_items );
 460
 461     ARRAY_RESET( p_playlist->items );
 462     ARRAY_RESET( p_playlist->current );
 463
 464     PL_UNLOCK;
 465 }
 466
 467 /** Main loop for preparser queue */
 468 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 469 {
 470     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 471     input_item_t *p_current;
 472     int i_activity;
 473     uint32_t i_m, i_o;
 474
 475     while( !p_playlist->b_die )
 476     {
 477         vlc_mutex_lock( &p_obj->object_lock );
 478         while( p_obj->i_waiting == 0 )
 479         {
 480             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 481             if( p_playlist->b_die )
 482             {
 483                 vlc_mutex_unlock( &p_obj->object_lock );
 484                 return;
 485             }
 486         }
 487
 488         p_current = p_obj->pp_waiting[0];
 489         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 490         vlc_mutex_unlock( &p_obj->object_lock );
 491
 492         PL_LOCK;
 493         if( p_current )
 494         {
 495             vlc_bool_t b_preparsed = VLC_FALSE;
 496             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
 497                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
 498                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
 499                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
 500                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
 501                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
 502                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
 503                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
 504             {
 505                 b_preparsed = VLC_TRUE;
 506                 stats_TimerStart( p_playlist, "Preparse run",
 507                                   STATS_TIMER_PREPARSE );
 508                 /* Do not preparse if it is already done (like by playing it) */
 509                 if( !input_item_IsPreparsed( p_current ) )
 510                 {
 511                     PL_UNLOCK;
 512                     input_Preparse( p_playlist, p_current );
 513                     PL_LOCK;
 514                 }
 515                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 516             }
 517             PL_UNLOCK;
 518             if( b_preparsed )
 519             {
 520                 input_item_SetPreparsed( p_current, VLC_TRUE );
 521                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 522             }
 523             PL_LOCK;
 524
 525             /* If we haven't retrieved enough meta, add to secondary queue
 526              * which will run the "meta fetchers".
 527              * This only checks for meta, not for art
 528              * \todo don't do this for things we won't get meta for, like vids
 529              */
 530             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 531             {
 532                 preparse_item_t p;
 533                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
 534                 p.p_item = p_current;
 535                 p.b_fetch_art = VLC_FALSE;
 536                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 537                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 538                              p_playlist->p_fetcher->i_waiting,
 539                              p_playlist->p_fetcher->i_waiting, p);
 540                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 541                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 542             }
 543             /* We already have all needed meta, but we need art right now */
 544             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 545                      EMPTY_STR( input_item_GetArtURL( p_current ) ) )
 546             {
 547                 preparse_item_t p;
 548                 PL_DEBUG("meta ok for %s, need to fetch art",
 549                                                          p_current->psz_name );
 550                 p.p_item = p_current;
 551                 p.b_fetch_art = VLC_TRUE;
 552                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 553                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 554                              p_playlist->p_fetcher->i_waiting,
 555                              p_playlist->p_fetcher->i_waiting, p);
 556                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 557                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 558             }
 559             else
 560             {
 561                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 562                           p_current->psz_name,
 563                           input_item_GetArtURL( p_current ));
 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             if( !b_fetch_art )
 608             {
 609                 input_MetaFetch( p_playlist, p_item );
 610                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 611                 /*  Fetch right now */
 612                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 613                 {
 614                     vlc_mutex_lock( &p_obj->object_lock );
 615                     preparse_item_t p;
 616                     p.p_item = p_item;
 617                     p.b_fetch_art = VLC_TRUE;
 618                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 619                                  p_playlist->p_fetcher->i_waiting,
 620                                  0, p );
 621                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
 622                     vlc_mutex_unlock( &p_obj->object_lock );
 623                     continue;
 624                 }
 625                 else
 626                     vlc_gc_decref( p_item );
 627             }
 628             else
 629             {
 630                 int i_ret;
 631
 632                 /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 633                  * (This can happen if we fetch art on play)
 634                  * FIXME this doesn't work if we need to fetch meta before art ... */
 635                 for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 636                 {
 637                     vlc_bool_t b_break;
 638                     PL_LOCK;
 639                     b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 640                                 p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 641                     PL_UNLOCK;
 642                     if( b_break )
 643                         break;
 644                     msleep( 50000 );
 645                 }
 646
 647                 i_ret = input_ArtFind( p_playlist, p_item );
 648                 if( i_ret == 1 )
 649                 {
 650                     PL_DEBUG("downloading art for %s", p_item->psz_name );
 651                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 652                         input_item_SetArtNotFound( p_item, VLC_TRUE );
 653                     else {
 654                         input_item_SetArtFetched( p_item, VLC_TRUE );
 655                         var_SetInteger( p_playlist, "item-change",
 656                                         p_item->i_id );
 657                     }
 658                 }
 659                 else if( i_ret == 0 ) /* Was in cache */
 660                 {
 661                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
 662                     input_item_SetArtFetched( p_item, VLC_TRUE );
 663                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 664                 }
 665                 else
 666                 {
 667                     PL_DEBUG("art not found for %s", p_item->psz_name );
 668                     input_item_SetArtNotFound( p_item, VLC_TRUE );
 669                 }
 670                 vlc_gc_decref( p_item );
 671            }
 672         }
 673         vlc_mutex_lock( &p_obj->object_lock );
 674         i_activity = var_GetInteger( p_playlist, "activity" );
 675         if( i_activity < 0 ) i_activity = 0;
 676         vlc_mutex_unlock( &p_obj->object_lock );
 677         /* Sleep at least 1ms */
 678         msleep( (i_activity+1) * 1000 );
 679     }
 680 }
 681
 682 static void VariablesInit( playlist_t *p_playlist )
 683 {
 684     vlc_value_t val;
 685     /* These variables control updates */
 686     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 687     val.b_bool = VLC_TRUE;
 688     var_Set( p_playlist, "intf-change", val );
 689
 690     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 691     val.i_int = -1;
 692     var_Set( p_playlist, "item-change", val );
 693
 694     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 695     val.i_int = -1;
 696     var_Set( p_playlist, "item-deleted", val );
 697
 698     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 699
 700     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 701     val.i_int = -1;
 702     var_Set( p_playlist, "playlist-current", val );
 703
 704     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 705
 706     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 707     val.b_bool = VLC_TRUE;
 708     var_Set( p_playlist, "intf-show", val );
 709
 710     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 711     var_SetInteger( p_playlist, "activity", 0 );
 712
 713     /* Variables to control playback */
 714     var_CreateGetBool( p_playlist, "play-and-stop" );
 715     var_CreateGetBool( p_playlist, "play-and-exit" );
 716     var_CreateGetBool( p_playlist, "random" );
 717     var_CreateGetBool( p_playlist, "repeat" );
 718     var_CreateGetBool( p_playlist, "loop" );
 719
 720     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 721 }