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 )
 182 {
 183     vlc_object_t *p_obj;
 184
 185     if( mdate() - p_playlist->gc_date < 1000000 )
 186     {
 187         p_playlist->b_cant_sleep = VLC_TRUE;
 188         return;
 189     }
 190     else if( p_playlist->gc_date == 0 )
 191         return;
 192
 193     vlc_mutex_lock( &p_playlist->gc_lock );
 194     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 195                                                   FIND_CHILD ) ) )
 196     {
 197         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 198         {
 199             vlc_object_release( p_obj );
 200             break;
 201         }
 202         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 203         vlc_object_detach( p_obj );
 204         vlc_object_release( p_obj );
 205         vout_Destroy( (vout_thread_t *)p_obj );
 206     }
 207     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 208                                                   FIND_CHILD ) ) )
 209     {
 210         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 211         {
 212             vlc_object_release( p_obj );
 213             break;
 214         }
 215         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 216         vlc_object_detach( p_obj );
 217         vlc_object_release( p_obj );
 218         sout_DeleteInstance( (sout_instance_t*)p_obj );
 219     }
 220     p_playlist->b_cant_sleep = VLC_FALSE;
 221     vlc_mutex_unlock( &p_playlist->gc_lock );
 222 }
 223
 224 /** Main loop for the playlist */
 225 void playlist_MainLoop( playlist_t *p_playlist )
 226 {
 227     playlist_item_t *p_item = NULL;
 228     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 229     PL_LOCK;
 230
 231     if( p_playlist->b_reset_currently_playing &&
 232         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 233     {
 234         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
 235                              p_playlist->status.p_item );
 236         p_playlist->last_rebuild_date = mdate();
 237     }
 238
 239 check_input:
 240     /* If there is an input, check that it doesn't need to die. */
 241     if( p_playlist->p_input )
 242     {
 243         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 244         {
 245             PL_DEBUG( "incoming request - stopping current input" );
 246             input_StopThread( p_playlist->p_input );
 247         }
 248
 249         /* This input is dead. Remove it ! */
 250         if( p_playlist->p_input->b_dead )
 251         {
 252             int i_activity;
 253             input_thread_t *p_input;
 254             PL_DEBUG( "dead input" );
 255
 256             p_input = p_playlist->p_input;
 257             p_playlist->p_input = NULL;
 258
 259             /* Release the playlist lock, because we may get stuck
 260              * in input_DestroyThread() for some time. */
 261             PL_UNLOCK
 262
 263             /* Destroy input */
 264             input_DestroyThread( p_input );
 265
 266             PL_LOCK;
 267
 268             p_playlist->gc_date = mdate();
 269             p_playlist->b_cant_sleep = VLC_TRUE;
 270
 271             if( p_playlist->status.p_item->i_flags
 272                 & PLAYLIST_REMOVE_FLAG )
 273             {
 274                  PL_DEBUG( "%s was marked for deletion, deleting",
 275                                  PLI_NAME( p_playlist->status.p_item  ) );
 276                  playlist_ItemDelete( p_playlist->status.p_item );
 277                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 278                      p_playlist->request.p_item = NULL;
 279                  p_playlist->status.p_item = NULL;
 280             }
 281
 282             i_activity= var_GetInteger( p_playlist, "activity") ;
 283             var_SetInteger( p_playlist, "activity", i_activity -
 284                             DEFAULT_INPUT_ACTIVITY );
 285             goto check_input;
 286         }
 287         /* This input is dying, let it do */
 288         else if( p_playlist->p_input->b_die )
 289         {
 290             PL_DEBUG( "dying input" );
 291             PL_UNLOCK;
 292             msleep( 25000 ); // 25 ms
 293             PL_LOCK;
 294             goto check_input;
 295         }
 296         /* This input has finished, ask it to die ! */
 297         else if( p_playlist->p_input->b_error
 298                   || p_playlist->p_input->b_eof )
 299         {
 300             PL_DEBUG( "finished input" );
 301             input_StopThread( p_playlist->p_input );
 302             /* No need to wait here, we'll wait in the p_input->b_die case */
 303             goto check_input;
 304         }
 305         else if( p_playlist->p_input->i_state != INIT_S )
 306         {
 307             PL_UNLOCK;
 308             ObjectGarbageCollector( p_playlist );
 309             PL_LOCK;
 310         }
 311     }
 312     else
 313     {
 314         /* No input. Several cases
 315          *  - No request, running status -> start new item
 316          *  - No request, stopped status -> collect garbage
 317          *  - Request, running requested -> start new item
 318          *  - Request, stopped requested -> collect garbage
 319          */
 320          if( (!p_playlist->request.b_request &&
 321               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 322               ( p_playlist->request.b_request &&
 323                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 324          {
 325              msg_Dbg( p_playlist, "starting new item" );
 326              p_item = playlist_NextItem( p_playlist );
 327
 328              if( p_item == NULL )
 329              {
 330                 msg_Dbg( p_playlist, "nothing to play" );
 331                 if( b_playexit == VLC_TRUE )
 332                 {
 333                     msg_Info( p_playlist, "end of playlist, exiting" );
 334                     p_playlist->p_libvlc->b_die = VLC_TRUE;
 335                 }
 336                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 337                 PL_UNLOCK
 338                 return;
 339              }
 340              playlist_PlayItem( p_playlist, p_item );
 341          }
 342          else
 343          {
 344             p_playlist->status.i_status = PLAYLIST_STOPPED;
 345             if( p_playlist->status.p_item &&
 346                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 347             {
 348                 PL_DEBUG( "deleting item marked for deletion" );
 349                 playlist_ItemDelete( p_playlist->status.p_item );
 350                 p_playlist->status.p_item = NULL;
 351             }
 352
 353             /* Collect garbage */
 354             PL_UNLOCK;
 355             ObjectGarbageCollector( p_playlist );
 356             PL_LOCK;
 357         }
 358     }
 359     PL_UNLOCK
 360 }
 361
 362 /** Playlist dying last loop */
 363 void playlist_LastLoop( playlist_t *p_playlist )
 364 {
 365     vlc_object_t *p_obj;
 366
 367     /* If there is an input, kill it */
 368     while( 1 )
 369     {
 370         PL_LOCK
 371
 372         if( p_playlist->p_input == NULL )
 373         {
 374             PL_UNLOCK
 375             break;
 376         }
 377
 378         if( p_playlist->p_input->b_dead )
 379         {
 380             input_thread_t *p_input;
 381
 382             /* Unlink current input */
 383             p_input = p_playlist->p_input;
 384             p_playlist->p_input = NULL;
 385             PL_UNLOCK
 386
 387             /* Destroy input */
 388             input_DestroyThread( p_input );
 389             continue;
 390         }
 391         else if( p_playlist->p_input->b_die )
 392         {
 393             /* This input is dying, leave it alone */
 394             ;
 395         }
 396         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 397         {
 398             input_StopThread( p_playlist->p_input );
 399             PL_UNLOCK
 400             continue;
 401         }
 402         else
 403         {
 404             p_playlist->p_input->b_eof = 1;
 405         }
 406
 407         PL_UNLOCK
 408
 409         msleep( INTF_IDLE_SLEEP );
 410     }
 411
 412     /* close all remaining sout */
 413     while( ( p_obj = vlc_object_find( p_playlist,
 414                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 415     {
 416         vlc_object_detach( p_obj );
 417         vlc_object_release( p_obj );
 418         sout_DeleteInstance( (sout_instance_t*)p_obj );
 419     }
 420
 421     /* close all remaining vout */
 422     while( ( p_obj = vlc_object_find( p_playlist,
 423                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 424     {
 425         vlc_object_detach( p_obj );
 426         vlc_object_release( p_obj );
 427         vout_Destroy( (vout_thread_t *)p_obj );
 428     }
 429
 430     while( p_playlist->i_sds )
 431     {
 432         playlist_ServicesDiscoveryRemove( p_playlist,
 433                                           p_playlist->pp_sds[0]->psz_module );
 434     }
 435
 436     playlist_MLDump( p_playlist );
 437
 438     PL_LOCK;
 439     /* Go through all items, and simply free everything without caring
 440      * about the tree structure. Do not decref, it will be done by doing
 441      * the same thing on the input items array */
 442     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 443         free( p_del->pp_children );
 444         free( p_del );
 445     FOREACH_END();
 446     ARRAY_RESET( p_playlist->all_items );
 447
 448     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 449         input_ItemClean( p_del );
 450         free( p_del );
 451     FOREACH_END();
 452     ARRAY_RESET( p_playlist->input_items );
 453
 454     ARRAY_RESET( p_playlist->items );
 455     ARRAY_RESET( p_playlist->current );
 456
 457     PL_UNLOCK;
 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( p_current->p_meta &&
 520                 !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 521             {
 522                 preparse_item_t p;
 523                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
 524                 p.p_item = p_current;
 525                 p.b_fetch_art = VLC_FALSE;
 526                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 527                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 528                              p_playlist->p_fetcher->i_waiting,
 529                              p_playlist->p_fetcher->i_waiting, 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_current->p_meta &&
 535                      p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 536                      EMPTY_STR( p_current->p_meta->psz_arturl ) )
 537             {
 538                 preparse_item_t p;
 539                 PL_DEBUG("meta ok for %s, need to fetch art",
 540                                                          p_current->psz_name );
 541                 p.p_item = p_current;
 542                 p.b_fetch_art = VLC_TRUE;
 543                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 544                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 545                              p_playlist->p_fetcher->i_waiting,
 546                              p_playlist->p_fetcher->i_waiting, 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,
 554                           p_current->p_meta ? p_current->p_meta->psz_arturl:
 555                                               "null" );
 556                 vlc_gc_decref( p_current );
 557             }
 558             PL_UNLOCK;
 559         }
 560         else
 561             PL_UNLOCK;
 562
 563         vlc_mutex_lock( &p_obj->object_lock );
 564         i_activity = var_GetInteger( p_playlist, "activity" );
 565         if( i_activity < 0 ) i_activity = 0;
 566         vlc_mutex_unlock( &p_obj->object_lock );
 567         /* Sleep at least 1ms */
 568         msleep( (i_activity+1) * 1000 );
 569     }
 570 }
 571
 572 /** Main loop for secondary preparser queue */
 573 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 574 {
 575     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 576     vlc_bool_t b_fetch_art;
 577     input_item_t *p_item;
 578     int i_activity;
 579
 580     while( !p_playlist->b_die )
 581     {
 582         vlc_mutex_lock( &p_obj->object_lock );
 583         while( p_obj->i_waiting == 0 )
 584         {
 585             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 586             if( p_playlist->b_die )
 587             {
 588                 vlc_mutex_unlock( &p_obj->object_lock );
 589                 return;
 590             }
 591         }
 592
 593         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 594         p_item = p_obj->p_waiting->p_item;
 595         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 596         vlc_mutex_unlock( &p_obj->object_lock );
 597         if( p_item )
 598         {
 599             assert( p_item->p_meta );
 600             if( !b_fetch_art )
 601             {
 602                 input_MetaFetch( p_playlist, p_item );
 603                 p_item->p_meta->i_status |= ITEM_META_FETCHED;
 604                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 605                 /*  Fetch right now */
 606                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 607                 {
 608                     vlc_mutex_lock( &p_obj->object_lock );
 609                     preparse_item_t p;
 610                     p.p_item = p_item;
 611                     p.b_fetch_art = VLC_TRUE;
 612                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 613                                  p_playlist->p_fetcher->i_waiting,
 614                                  0, p );
 615                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
 616                     vlc_mutex_unlock( &p_obj->object_lock );
 617                     continue;
 618                 }
 619                 else
 620                     vlc_gc_decref( p_item );
 621             }
 622             else
 623             {
 624                 int i_ret = input_ArtFind( p_playlist, p_item );
 625                 if( i_ret == 1 )
 626                 {
 627                     PL_DEBUG("downloading art for %s", p_item->psz_name );
 628                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 629                         p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 630                     else {
 631                         p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 632                         var_SetInteger( p_playlist, "item-change",
 633                                         p_item->i_id );
 634                     }
 635                 }
 636                 else if( i_ret == 0 ) /* Was in cache */
 637                 {
 638                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
 639                     p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 640                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 641                 }
 642                 else
 643                 {
 644                     PL_DEBUG("art not found for %s", p_item->psz_name );
 645                     p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 646                 }
 647                 vlc_gc_decref( p_item );
 648            }
 649         }
 650         vlc_mutex_lock( &p_obj->object_lock );
 651         i_activity = var_GetInteger( p_playlist, "activity" );
 652         if( i_activity < 0 ) i_activity = 0;
 653         vlc_mutex_unlock( &p_obj->object_lock );
 654         /* Sleep at least 1ms */
 655         msleep( (i_activity+1) * 1000 );
 656     }
 657 }
 658
 659 static void VariablesInit( playlist_t *p_playlist )
 660 {
 661     vlc_value_t val;
 662     /* These variables control updates */
 663     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 664     val.b_bool = VLC_TRUE;
 665     var_Set( p_playlist, "intf-change", val );
 666
 667     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 668     val.i_int = -1;
 669     var_Set( p_playlist, "item-change", val );
 670
 671     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 672     val.i_int = -1;
 673     var_Set( p_playlist, "item-deleted", val );
 674
 675     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 676
 677     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 678     val.i_int = -1;
 679     var_Set( p_playlist, "playlist-current", val );
 680
 681     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 682
 683     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 684     val.b_bool = VLC_TRUE;
 685     var_Set( p_playlist, "intf-show", val );
 686
 687     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 688     var_SetInteger( p_playlist, "activity", 0 );
 689
 690     /* Variables to control playback */
 691     var_CreateGetBool( p_playlist, "play-and-stop" );
 692     var_CreateGetBool( p_playlist, "play-and-exit" );
 693     var_CreateGetBool( p_playlist, "random" );
 694     var_CreateGetBool( p_playlist, "repeat" );
 695     var_CreateGetBool( p_playlist, "loop" );
 696
 697     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 698 }