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

   1 /*****************************************************************************
   2  * engine.c : Run the playlist and handle its control
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Clément Stenac <zorglub@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #include <vlc/vlc.h>
  26 #include <vlc/vout.h>
  27 #include <vlc/sout.h>
  28 #include <vlc/input.h>
  29 #include "vlc_playlist.h"
  30 #include "vlc_interaction.h"
  31 #include "playlist_internal.h"
  32
  33 /*****************************************************************************
  34  * Local prototypes
  35  *****************************************************************************/
  36 static void VariablesInit( playlist_t *p_playlist );
  37
  38 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  39                            vlc_value_t oldval, vlc_value_t newval, void *a )
  40 {
  41     ((playlist_t*)p_this)->b_reset_currently_playing = VLC_TRUE;
  42     playlist_Signal( ((playlist_t*)p_this) );
  43     return VLC_SUCCESS;
  44 }
  45
  46 /**
  47  * Create playlist
  48  *
  49  * Create a playlist structure.
  50  * \param p_parent the vlc object that is to be the parent of this playlist
  51  * \return a pointer to the created playlist, or NULL on error
  52  */
  53 playlist_t * playlist_Create( vlc_object_t *p_parent )
  54 {
  55     playlist_t *p_playlist;
  56     int i_tree;
  57
  58     /* Allocate structure */
  59     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  60     if( !p_playlist )
  61     {
  62         msg_Err( p_parent, "out of memory" );
  63         return NULL;
  64     }
  65     p_parent->p_libvlc->p_playlist = p_playlist;
  66
  67     VariablesInit( p_playlist );
  68
  69     /* Initialise data structures */
  70     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  71     p_playlist->i_last_playlist_id = 0;
  72     p_playlist->i_last_input_id = 0;
  73     p_playlist->p_input = NULL;
  74
  75     p_playlist->gc_date = 0;
  76     p_playlist->b_cant_sleep = VLC_FALSE;
  77
  78     ARRAY_INIT( p_playlist->items );
  79     ARRAY_INIT( p_playlist->all_items );
  80     ARRAY_INIT( p_playlist->input_items );
  81     ARRAY_INIT( p_playlist->current );
  82
  83     p_playlist->i_current_index = 0;
  84     p_playlist->b_reset_currently_playing = VLC_TRUE;
  85     p_playlist->last_rebuild_date = 0;
  86
  87     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  88     p_playlist->b_always_tree = (i_tree == 1);
  89     p_playlist->b_never_tree = (i_tree == 2);
  90
  91     p_playlist->b_doing_ml = VLC_FALSE;
  92
  93     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL);
  94     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL);
  95
  96     /* Create playlist and media library */
  97     p_playlist->p_local_category = playlist_NodeCreate( p_playlist,
  98                                  _( "Playlist" ),p_playlist->p_root_category );
  99     p_playlist->p_local_onelevel =  playlist_NodeCreate( p_playlist,
 100                                 _( "Playlist" ), p_playlist->p_root_onelevel );
 101     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 102     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 103
 104     /* Link the nodes together. Todo: actually create them from the same input*/
 105     p_playlist->p_local_onelevel->p_input->i_id =
 106         p_playlist->p_local_category->p_input->i_id;
 107
 108     if( config_GetInt( p_playlist, "media-library") )
 109     {
 110         p_playlist->p_ml_category =   playlist_NodeCreate( p_playlist,
 111                            _( "Media Library" ), p_playlist->p_root_category );
 112         p_playlist->p_ml_onelevel =  playlist_NodeCreate( p_playlist,
 113                            _( "Media Library" ), p_playlist->p_root_onelevel );
 114         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 115         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 116         p_playlist->p_ml_onelevel->p_input->i_id =
 117              p_playlist->p_ml_category->p_input->i_id;
 118
 119     }
 120     else
 121     {
 122         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 123     }
 124
 125     /* Initial status */
 126     p_playlist->status.p_item = NULL;
 127     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 128     p_playlist->request.b_request = VLC_FALSE;
 129     p_playlist->status.i_status = PLAYLIST_STOPPED;
 130
 131     p_playlist->i_sort = SORT_ID;
 132     p_playlist->i_order = ORDER_NORMAL;
 133
 134     vlc_object_attach( p_playlist, p_parent );
 135
 136     playlist_MLLoad( p_playlist );
 137     return p_playlist;
 138 }
 139
 140 void playlist_Destroy( playlist_t *p_playlist )
 141 {
 142     while( p_playlist->i_sds )
 143     {
 144         playlist_ServicesDiscoveryRemove( p_playlist,
 145                                           p_playlist->pp_sds[0]->psz_module );
 146     }
 147
 148     playlist_MLDump( p_playlist );
 149
 150     vlc_thread_join( p_playlist->p_preparse );
 151     vlc_thread_join( p_playlist->p_fetcher );
 152     vlc_thread_join( p_playlist );
 153
 154     vlc_object_detach( p_playlist->p_preparse );
 155     vlc_object_detach( p_playlist->p_fetcher );
 156
 157     var_Destroy( p_playlist, "intf-change" );
 158     var_Destroy( p_playlist, "item-change" );
 159     var_Destroy( p_playlist, "playlist-current" );
 160     var_Destroy( p_playlist, "intf-popmenu" );
 161     var_Destroy( p_playlist, "intf-show" );
 162     var_Destroy( p_playlist, "play-and-stop" );
 163     var_Destroy( p_playlist, "play-and-exit" );
 164     var_Destroy( p_playlist, "random" );
 165     var_Destroy( p_playlist, "repeat" );
 166     var_Destroy( p_playlist, "loop" );
 167     var_Destroy( p_playlist, "activity" );
 168
 169     PL_LOCK;
 170     /* Go through all items, and simply free everything without caring
 171      * about the tree structure. Do not decref, it will be done by doing
 172      * the same thing on the input items array */
 173     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 174         free( p_del->pp_children );
 175         free( p_del );
 176     FOREACH_END();
 177     ARRAY_RESET( p_playlist->all_items );
 178
 179     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 180         input_ItemClean( p_del );
 181         free( p_del );
 182     FOREACH_END();
 183     ARRAY_RESET( p_playlist->input_items );
 184
 185     ARRAY_RESET( p_playlist->items );
 186     ARRAY_RESET( p_playlist->current );
 187
 188     PL_UNLOCK;
 189
 190     if( p_playlist->p_stats )
 191         free( p_playlist->p_stats );
 192
 193     vlc_mutex_destroy( &p_playlist->gc_lock );
 194     vlc_object_destroy( p_playlist->p_preparse );
 195     vlc_object_destroy( p_playlist->p_fetcher );
 196     vlc_object_detach( p_playlist );
 197     vlc_object_destroy( p_playlist );
 198
 199 }
 200
 201 /* Destroy remaining objects */
 202 static void ObjectGarbageCollector( playlist_t *p_playlist )
 203 {
 204     vlc_object_t *p_obj;
 205
 206     if( mdate() - p_playlist->gc_date < 1000000 )
 207     {
 208         p_playlist->b_cant_sleep = VLC_TRUE;
 209         return;
 210     }
 211     else if( p_playlist->gc_date == 0 )
 212         return;
 213
 214     vlc_mutex_lock( &p_playlist->gc_lock );
 215     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 216                                                   FIND_CHILD ) ) )
 217     {
 218         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 219         {
 220             vlc_object_release( p_obj );
 221             break;
 222         }
 223         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 224         vlc_object_detach( p_obj );
 225         vlc_object_release( p_obj );
 226         vout_Destroy( (vout_thread_t *)p_obj );
 227     }
 228     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 229                                                   FIND_CHILD ) ) )
 230     {
 231         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 232         {
 233             vlc_object_release( p_obj );
 234             break;
 235         }
 236         vlc_object_release( p_obj );
 237         sout_DeleteInstance( (sout_instance_t*)p_obj );
 238     }
 239     p_playlist->b_cant_sleep = VLC_FALSE;
 240     vlc_mutex_unlock( &p_playlist->gc_lock );
 241 }
 242
 243 /** Main loop for the playlist */
 244 void playlist_MainLoop( playlist_t *p_playlist )
 245 {
 246     playlist_item_t *p_item = NULL;
 247     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 248     PL_LOCK;
 249
 250     if( p_playlist->b_reset_currently_playing &&
 251         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 252     {
 253         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
 254                              p_playlist->status.p_item );
 255         p_playlist->last_rebuild_date = mdate();
 256     }
 257
 258 check_input:
 259     /* If there is an input, check that it doesn't need to die. */
 260     if( p_playlist->p_input )
 261     {
 262         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 263         {
 264             PL_DEBUG( "incoming request - stopping current input" );
 265             input_StopThread( p_playlist->p_input );
 266         }
 267
 268         /* This input is dead. Remove it ! */
 269         if( p_playlist->p_input->b_dead )
 270         {
 271             int i_activity;
 272             input_thread_t *p_input;
 273             PL_DEBUG( "dead input" );
 274
 275             p_input = p_playlist->p_input;
 276             p_playlist->p_input = NULL;
 277
 278             /* Release the playlist lock, because we may get stuck
 279              * in input_DestroyThread() for some time. */
 280             PL_UNLOCK
 281
 282             /* Destroy input */
 283             input_DestroyThread( p_input );
 284
 285             /* Unlink current input
 286              * (_after_ input_DestroyThread for vout garbage collector) */
 287             vlc_object_detach( p_input );
 288
 289             /* Destroy object */
 290             vlc_object_destroy( p_input );
 291
 292             PL_LOCK;
 293
 294             p_playlist->gc_date = mdate();
 295             p_playlist->b_cant_sleep = VLC_TRUE;
 296
 297             if( p_playlist->status.p_item->i_flags
 298                 & PLAYLIST_REMOVE_FLAG )
 299             {
 300                  PL_DEBUG( "%s was marked for deletion, deleting",
 301                                  PLI_NAME( p_playlist->status.p_item  ) );
 302                  playlist_ItemDelete( p_playlist->status.p_item );
 303                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 304                      p_playlist->request.p_item = NULL;
 305                  p_playlist->status.p_item = NULL;
 306             }
 307
 308             i_activity= var_GetInteger( p_playlist, "activity") ;
 309             var_SetInteger( p_playlist, "activity", i_activity -
 310                             DEFAULT_INPUT_ACTIVITY );
 311             goto check_input;
 312         }
 313         /* This input is dying, let it do */
 314         else if( p_playlist->p_input->b_die )
 315         {
 316             PL_DEBUG( "dying input" );
 317             msleep( 25000 ); // 25 ms
 318             goto check_input;
 319         }
 320         /* This input has finished, ask it to die ! */
 321         else if( p_playlist->p_input->b_error
 322                   || p_playlist->p_input->b_eof )
 323         {
 324             PL_DEBUG( "finished input" );
 325             input_StopThread( p_playlist->p_input );
 326             /* No need to wait here, we'll wait in the p_input->b_die case */
 327             goto check_input;
 328         }
 329         else if( p_playlist->p_input->i_state != INIT_S )
 330         {
 331             PL_UNLOCK;
 332             ObjectGarbageCollector( p_playlist );
 333             PL_LOCK;
 334         }
 335     }
 336     else
 337     {
 338         /* No input. Several cases
 339          *  - No request, running status -> start new item
 340          *  - No request, stopped status -> collect garbage
 341          *  - Request, running requested -> start new item
 342          *  - Request, stopped requested -> collect garbage
 343          */
 344          if( (!p_playlist->request.b_request &&
 345               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 346               ( p_playlist->request.b_request &&
 347                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 348          {
 349              msg_Dbg( p_playlist, "starting new item" );
 350              p_item = playlist_NextItem( p_playlist );
 351
 352              if( p_item == NULL )
 353              {
 354                 msg_Dbg( p_playlist, "nothing to play" );
 355                 if( b_playexit == VLC_TRUE )
 356                 {
 357                     msg_Info( p_playlist, "end of playlist, exiting" );
 358                     p_playlist->p_libvlc->b_die = VLC_TRUE;
 359                 }
 360                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 361                 PL_UNLOCK
 362                 return;
 363              }
 364              playlist_PlayItem( p_playlist, p_item );
 365          }
 366          else
 367          {
 368             p_playlist->status.i_status = PLAYLIST_STOPPED;
 369             if( p_playlist->status.p_item &&
 370                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 371             {
 372                 PL_DEBUG( "deleting item marked for deletion" );
 373                 playlist_ItemDelete( p_playlist->status.p_item );
 374                 p_playlist->status.p_item = NULL;
 375             }
 376
 377             /* Collect garbage */
 378             PL_UNLOCK;
 379             ObjectGarbageCollector( p_playlist );
 380             PL_LOCK;
 381         }
 382     }
 383     PL_UNLOCK
 384 }
 385
 386 /** Playlist dying last loop */
 387 void playlist_LastLoop( playlist_t *p_playlist )
 388 {
 389     vlc_object_t *p_obj;
 390
 391     /* If there is an input, kill it */
 392     while( 1 )
 393     {
 394         PL_LOCK
 395
 396         if( p_playlist->p_input == NULL )
 397         {
 398             PL_UNLOCK
 399             break;
 400         }
 401
 402         if( p_playlist->p_input->b_dead )
 403         {
 404             input_thread_t *p_input;
 405
 406             /* Unlink current input */
 407             p_input = p_playlist->p_input;
 408             p_playlist->p_input = NULL;
 409             PL_UNLOCK
 410
 411             /* Destroy input */
 412             input_DestroyThread( p_input );
 413             /* Unlink current input (_after_ input_DestroyThread for vout
 414              * garbage collector)*/
 415             vlc_object_detach( p_input );
 416
 417             /* Destroy object */
 418             vlc_object_destroy( p_input );
 419             continue;
 420         }
 421         else if( p_playlist->p_input->b_die )
 422         {
 423             /* This input is dying, leave it alone */
 424             ;
 425         }
 426         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 427         {
 428             input_StopThread( p_playlist->p_input );
 429             PL_UNLOCK
 430             continue;
 431         }
 432         else
 433         {
 434             p_playlist->p_input->b_eof = 1;
 435         }
 436
 437         PL_UNLOCK
 438
 439         msleep( INTF_IDLE_SLEEP );
 440     }
 441
 442     /* close all remaining sout */
 443     while( ( p_obj = vlc_object_find( p_playlist,
 444                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 445     {
 446         vlc_object_release( p_obj );
 447         sout_DeleteInstance( (sout_instance_t*)p_obj );
 448     }
 449
 450     /* close all remaining vout */
 451     while( ( p_obj = vlc_object_find( p_playlist,
 452                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 453     {
 454         vlc_object_detach( p_obj );
 455         vlc_object_release( p_obj );
 456         vout_Destroy( (vout_thread_t *)p_obj );
 457     }
 458 }
 459
 460 /** Main loop for preparser queue */
 461 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 462 {
 463     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 464     input_item_t *p_current;
 465     int i_activity;
 466     uint32_t i_m, i_o;
 467
 468     while( !p_playlist->b_die )
 469     {
 470         vlc_mutex_lock( &p_obj->object_lock );
 471         while( p_obj->i_waiting == 0 )
 472         {
 473             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 474             if( p_playlist->b_die )
 475             {
 476                 vlc_mutex_unlock( &p_obj->object_lock );
 477                 return;
 478             }
 479         }
 480
 481         p_current = p_obj->pp_waiting[0];
 482         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 483         vlc_mutex_unlock( &p_obj->object_lock );
 484
 485         PL_LOCK;
 486         if( p_current )
 487         {
 488             vlc_bool_t b_preparsed = VLC_FALSE;
 489             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
 490                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
 491                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
 492                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
 493                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
 494                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
 495                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
 496                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
 497             {
 498                 b_preparsed = VLC_TRUE;
 499                 stats_TimerStart( p_playlist, "Preparse run",
 500                                   STATS_TIMER_PREPARSE );
 501                 PL_UNLOCK;
 502                 input_Preparse( p_playlist, p_current );
 503                 PL_LOCK;
 504                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 505             }
 506             PL_UNLOCK;
 507             if( b_preparsed )
 508             {
 509                 p_current->p_meta->i_status |= ITEM_PREPARSED;
 510                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 511             }
 512             PL_LOCK;
 513
 514             /* If we haven't retrieved enough meta, add to secondary queue
 515              * which will run the "meta fetchers".
 516              * This only checks for meta, not for art
 517              * \todo don't do this for things we won't get meta for, like vids
 518              */
 519             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 520             {
 521                 preparse_item_t p;
 522                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
 523                 p.p_item = p_current;
 524                 p.b_fetch_art = VLC_FALSE;
 525                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 526                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 527                              p_playlist->p_fetcher->i_waiting,
 528                              p_playlist->p_fetcher->i_waiting,
 529                              p );
 530                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 531                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 532             }
 533             /* We already have all needed meta, but we need art right now */
 534             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 535                      EMPTY_STR( p_current->p_meta->psz_arturl ) )
 536             {
 537                 preparse_item_t p;
 538                 PL_DEBUG("meta ok for %s, need to fetch art",
 539                                                          p_current->psz_name );
 540                 p.p_item = p_current;
 541                 p.b_fetch_art = VLC_TRUE;
 542                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 543                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 544                              p_playlist->p_fetcher->i_waiting,
 545                              p_playlist->p_fetcher->i_waiting,
 546                              p );
 547                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 548                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 549             }
 550             else
 551             {
 552                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 553                           p_current->psz_name, p_current->p_meta->psz_arturl );
 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( !b_fetch_art )
 598             {
 599                 input_MetaFetch( p_playlist, p_item );
 600                 p_item->p_meta->i_status |= ITEM_META_FETCHED;
 601                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 602                 /*  Fetch right now */
 603                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 604                 {
 605                     vlc_mutex_lock( &p_obj->object_lock );
 606                     preparse_item_t p;
 607                     p.p_item = p_item;
 608                     p.b_fetch_art = VLC_TRUE;
 609                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 610                                  p_playlist->p_fetcher->i_waiting,
 611                                  0, p );
 612                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
 613                     vlc_mutex_unlock( &p_obj->object_lock );
 614                     continue;
 615                 }
 616                 else
 617                     vlc_gc_decref( p_item );
 618             }
 619             else
 620             {
 621                 int i_ret = input_ArtFind( p_playlist, p_item );
 622                 if( i_ret == 1 )
 623                 {
 624                     PL_DEBUG("downloading art for %s", p_item->psz_name );
 625                     if( !input_DownloadAndCacheArt( p_playlist, p_item ) )
 626                         p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 627                     else
 628                         p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 629                 }
 630                 else if( i_ret == 0 ) /* Was in cache */
 631                 {
 632                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
 633                     p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 634                 }
 635                 else
 636                 {
 637                     PL_DEBUG("art not found for %s", p_item->psz_name );
 638                     p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 639                 }
 640                 vlc_gc_decref( p_item );
 641            }
 642         }
 643         vlc_mutex_lock( &p_obj->object_lock );
 644         i_activity = var_GetInteger( p_playlist, "activity" );
 645         if( i_activity < 0 ) i_activity = 0;
 646         vlc_mutex_unlock( &p_obj->object_lock );
 647         /* Sleep at least 1ms */
 648         msleep( (i_activity+1) * 1000 );
 649     }
 650 }
 651
 652 static void VariablesInit( playlist_t *p_playlist )
 653 {
 654     vlc_value_t val;
 655     /* These variables control updates */
 656     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 657     val.b_bool = VLC_TRUE;
 658     var_Set( p_playlist, "intf-change", val );
 659
 660     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 661     val.i_int = -1;
 662     var_Set( p_playlist, "item-change", val );
 663
 664     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 665     val.i_int = -1;
 666     var_Set( p_playlist, "item-deleted", val );
 667
 668     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 669
 670     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 671     val.i_int = -1;
 672     var_Set( p_playlist, "playlist-current", val );
 673
 674     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 675
 676     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 677     val.b_bool = VLC_TRUE;
 678     var_Set( p_playlist, "intf-show", val );
 679
 680     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 681     var_SetInteger( p_playlist, "activity", 0 );
 682
 683     /* Variables to control playback */
 684     var_CreateGetBool( p_playlist, "play-and-stop" );
 685     var_CreateGetBool( p_playlist, "play-and-exit" );
 686     var_CreateGetBool( p_playlist, "random" );
 687     var_CreateGetBool( p_playlist, "repeat" );
 688     var_CreateGetBool( p_playlist, "loop" );
 689
 690     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 691 }