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

   1 /*****************************************************************************
   2  * engine.c : Run the playlist and handle its control
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Clément Stenac <zorglub@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #include <vlc/vlc.h>
  26 #include <vlc_vout.h>
  27 #include <vlc_sout.h>
  28 #include <vlc_playlist.h>
  29 #include <vlc_interface.h>
  30 #include "playlist_internal.h"
  31 #include "stream_output/stream_output.h" /* sout_DeleteInstance */
  32
  33 /*****************************************************************************
  34  * Local prototypes
  35  *****************************************************************************/
  36 static void VariablesInit( playlist_t *p_playlist );
  37
  38 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  39                            vlc_value_t oldval, vlc_value_t newval, void *a )
  40 {
  41     ((playlist_t*)p_this)->b_reset_currently_playing = VLC_TRUE;
  42     playlist_Signal( ((playlist_t*)p_this) );
  43     return VLC_SUCCESS;
  44 }
  45
  46 /**
  47  * Create playlist
  48  *
  49  * Create a playlist structure.
  50  * \param p_parent the vlc object that is to be the parent of this playlist
  51  * \return a pointer to the created playlist, or NULL on error
  52  */
  53 playlist_t * playlist_Create( vlc_object_t *p_parent )
  54 {
  55     playlist_t *p_playlist;
  56     vlc_bool_t b_save;
  57     int i_tree;
  58
  59     /* Allocate structure */
  60     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  61     if( !p_playlist )
  62     {
  63         msg_Err( p_parent, "out of memory" );
  64         return NULL;
  65     }
  66     p_parent->p_libvlc->p_playlist = p_playlist;
  67
  68     VariablesInit( p_playlist );
  69
  70     /* Initialise data structures */
  71     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  72     p_playlist->i_last_playlist_id = 0;
  73     p_playlist->i_last_input_id = 0;
  74     p_playlist->p_input = NULL;
  75
  76     p_playlist->gc_date = 0;
  77     p_playlist->b_cant_sleep = VLC_FALSE;
  78
  79     ARRAY_INIT( p_playlist->items );
  80     ARRAY_INIT( p_playlist->all_items );
  81     ARRAY_INIT( p_playlist->input_items );
  82     ARRAY_INIT( p_playlist->current );
  83
  84     p_playlist->i_current_index = 0;
  85     p_playlist->b_reset_currently_playing = VLC_TRUE;
  86     p_playlist->last_rebuild_date = 0;
  87
  88     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  89     p_playlist->b_always_tree = (i_tree == 1);
  90     p_playlist->b_never_tree = (i_tree == 2);
  91
  92     p_playlist->b_doing_ml = VLC_FALSE;
  93
  94     p_playlist->b_auto_preparse =
  95                         var_CreateGetBool( p_playlist, "auto-preparse") ;
  96
  97     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
  98                                                        0 );
  99     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 100                                                        0 );
 101
 102     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 103         return NULL;
 104
 105     /* Create playlist and media library */
 106     p_playlist->p_local_category = playlist_NodeCreate( p_playlist,
 107                               _( "Playlist" ),p_playlist->p_root_category, 0 );
 108     p_playlist->p_local_onelevel =  playlist_NodeCreate( p_playlist,
 109                               _( "Playlist" ), p_playlist->p_root_onelevel, 0 );
 110     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 111     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 112
 113     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 114         !p_playlist->p_local_category->p_input ||
 115         !p_playlist->p_local_onelevel->p_input )
 116         return NULL;
 117
 118     /* Link the nodes together. Todo: actually create them from the same input*/
 119     p_playlist->p_local_onelevel->p_input->i_id =
 120         p_playlist->p_local_category->p_input->i_id;
 121
 122     if( config_GetInt( p_playlist, "media-library") )
 123     {
 124         p_playlist->p_ml_category =   playlist_NodeCreate( p_playlist,
 125                          _( "Media Library" ), p_playlist->p_root_category, 0 );
 126         p_playlist->p_ml_onelevel =  playlist_NodeCreate( p_playlist,
 127                          _( "Media Library" ), p_playlist->p_root_onelevel, 0 );
 128
 129         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 130             return NULL;
 131
 132         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 133         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 134         p_playlist->p_ml_onelevel->p_input->i_id =
 135              p_playlist->p_ml_category->p_input->i_id;
 136
 137     }
 138     else
 139     {
 140         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 141     }
 142
 143     /* Initial status */
 144     p_playlist->status.p_item = NULL;
 145     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 146     p_playlist->request.b_request = VLC_FALSE;
 147     p_playlist->status.i_status = PLAYLIST_STOPPED;
 148
 149     p_playlist->i_sort = SORT_ID;
 150     p_playlist->i_order = ORDER_NORMAL;
 151
 152     b_save = p_playlist->b_auto_preparse;
 153     p_playlist->b_auto_preparse = VLC_FALSE;
 154     playlist_MLLoad( p_playlist );
 155     p_playlist->b_auto_preparse = VLC_TRUE;
 156     return p_playlist;
 157 }
 158
 159 void playlist_Destroy( playlist_t *p_playlist )
 160 {
 161     while( p_playlist->i_sds )
 162     {
 163         playlist_ServicesDiscoveryRemove( p_playlist,
 164                                           p_playlist->pp_sds[0]->psz_module );
 165     }
 166
 167     playlist_MLDump( p_playlist );
 168
 169     vlc_thread_join( p_playlist->p_preparse );
 170     vlc_thread_join( p_playlist->p_fetcher );
 171     vlc_thread_join( p_playlist );
 172
 173     vlc_object_detach( p_playlist->p_preparse );
 174     vlc_object_detach( p_playlist->p_fetcher );
 175
 176     var_Destroy( p_playlist, "intf-change" );
 177     var_Destroy( p_playlist, "item-change" );
 178     var_Destroy( p_playlist, "playlist-current" );
 179     var_Destroy( p_playlist, "intf-popmenu" );
 180     var_Destroy( p_playlist, "intf-show" );
 181     var_Destroy( p_playlist, "play-and-stop" );
 182     var_Destroy( p_playlist, "play-and-exit" );
 183     var_Destroy( p_playlist, "random" );
 184     var_Destroy( p_playlist, "repeat" );
 185     var_Destroy( p_playlist, "loop" );
 186     var_Destroy( p_playlist, "activity" );
 187
 188     PL_LOCK;
 189     /* Go through all items, and simply free everything without caring
 190      * about the tree structure. Do not decref, it will be done by doing
 191      * the same thing on the input items array */
 192     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 193         free( p_del->pp_children );
 194         free( p_del );
 195     FOREACH_END();
 196     ARRAY_RESET( p_playlist->all_items );
 197
 198     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 199         input_ItemClean( p_del );
 200         free( p_del );
 201     FOREACH_END();
 202     ARRAY_RESET( p_playlist->input_items );
 203
 204     ARRAY_RESET( p_playlist->items );
 205     ARRAY_RESET( p_playlist->current );
 206
 207     PL_UNLOCK;
 208
 209     vlc_mutex_destroy( &p_playlist->p_stats->lock );
 210     if( p_playlist->p_stats )
 211         free( p_playlist->p_stats );
 212
 213     vlc_mutex_destroy( &p_playlist->gc_lock );
 214     vlc_object_destroy( p_playlist->p_preparse );
 215     vlc_object_destroy( p_playlist->p_fetcher );
 216     vlc_object_detach( p_playlist );
 217     vlc_object_destroy( p_playlist );
 218 }
 219
 220 /* Destroy remaining objects */
 221 static void ObjectGarbageCollector( playlist_t *p_playlist )
 222 {
 223     vlc_object_t *p_obj;
 224
 225     if( mdate() - p_playlist->gc_date < 1000000 )
 226     {
 227         p_playlist->b_cant_sleep = VLC_TRUE;
 228         return;
 229     }
 230     else if( p_playlist->gc_date == 0 )
 231         return;
 232
 233     vlc_mutex_lock( &p_playlist->gc_lock );
 234     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 235                                                   FIND_CHILD ) ) )
 236     {
 237         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 238         {
 239             vlc_object_release( p_obj );
 240             break;
 241         }
 242         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 243         vlc_object_detach( p_obj );
 244         vlc_object_release( p_obj );
 245         vout_Destroy( (vout_thread_t *)p_obj );
 246     }
 247     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 248                                                   FIND_CHILD ) ) )
 249     {
 250         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 251         {
 252             vlc_object_release( p_obj );
 253             break;
 254         }
 255         vlc_object_release( p_obj );
 256         sout_DeleteInstance( (sout_instance_t*)p_obj );
 257     }
 258     p_playlist->b_cant_sleep = VLC_FALSE;
 259     vlc_mutex_unlock( &p_playlist->gc_lock );
 260 }
 261
 262 /** Main loop for the playlist */
 263 void playlist_MainLoop( playlist_t *p_playlist )
 264 {
 265     playlist_item_t *p_item = NULL;
 266     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 267     PL_LOCK;
 268
 269     if( p_playlist->b_reset_currently_playing &&
 270         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 271     {
 272         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
 273                              p_playlist->status.p_item );
 274         p_playlist->last_rebuild_date = mdate();
 275     }
 276
 277 check_input:
 278     /* If there is an input, check that it doesn't need to die. */
 279     if( p_playlist->p_input )
 280     {
 281         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 282         {
 283             PL_DEBUG( "incoming request - stopping current input" );
 284             input_StopThread( p_playlist->p_input );
 285         }
 286
 287         /* This input is dead. Remove it ! */
 288         if( p_playlist->p_input->b_dead )
 289         {
 290             int i_activity;
 291             input_thread_t *p_input;
 292             PL_DEBUG( "dead input" );
 293
 294             p_input = p_playlist->p_input;
 295             p_playlist->p_input = NULL;
 296
 297             /* Release the playlist lock, because we may get stuck
 298              * in input_DestroyThread() for some time. */
 299             PL_UNLOCK
 300
 301             /* Destroy input */
 302             input_DestroyThread( p_input );
 303
 304             /* Unlink current input
 305              * (_after_ input_DestroyThread for vout garbage collector) */
 306             vlc_object_detach( p_input );
 307
 308             /* Destroy object */
 309             vlc_object_destroy( p_input );
 310
 311             PL_LOCK;
 312
 313             p_playlist->gc_date = mdate();
 314             p_playlist->b_cant_sleep = VLC_TRUE;
 315
 316             if( p_playlist->status.p_item->i_flags
 317                 & PLAYLIST_REMOVE_FLAG )
 318             {
 319                  PL_DEBUG( "%s was marked for deletion, deleting",
 320                                  PLI_NAME( p_playlist->status.p_item  ) );
 321                  playlist_ItemDelete( p_playlist->status.p_item );
 322                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 323                      p_playlist->request.p_item = NULL;
 324                  p_playlist->status.p_item = NULL;
 325             }
 326
 327             i_activity= var_GetInteger( p_playlist, "activity") ;
 328             var_SetInteger( p_playlist, "activity", i_activity -
 329                             DEFAULT_INPUT_ACTIVITY );
 330             goto check_input;
 331         }
 332         /* This input is dying, let it do */
 333         else if( p_playlist->p_input->b_die )
 334         {
 335             PL_DEBUG( "dying input" );
 336             msleep( 25000 ); // 25 ms
 337             goto check_input;
 338         }
 339         /* This input has finished, ask it to die ! */
 340         else if( p_playlist->p_input->b_error
 341                   || p_playlist->p_input->b_eof )
 342         {
 343             PL_DEBUG( "finished input" );
 344             input_StopThread( p_playlist->p_input );
 345             /* No need to wait here, we'll wait in the p_input->b_die case */
 346             goto check_input;
 347         }
 348         else if( p_playlist->p_input->i_state != INIT_S )
 349         {
 350             PL_UNLOCK;
 351             ObjectGarbageCollector( p_playlist );
 352             PL_LOCK;
 353         }
 354     }
 355     else
 356     {
 357         /* No input. Several cases
 358          *  - No request, running status -> start new item
 359          *  - No request, stopped status -> collect garbage
 360          *  - Request, running requested -> start new item
 361          *  - Request, stopped requested -> collect garbage
 362          */
 363          if( (!p_playlist->request.b_request &&
 364               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 365               ( p_playlist->request.b_request &&
 366                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 367          {
 368              msg_Dbg( p_playlist, "starting new item" );
 369              p_item = playlist_NextItem( p_playlist );
 370
 371              if( p_item == NULL )
 372              {
 373                 msg_Dbg( p_playlist, "nothing to play" );
 374                 if( b_playexit == VLC_TRUE )
 375                 {
 376                     msg_Info( p_playlist, "end of playlist, exiting" );
 377                     p_playlist->p_libvlc->b_die = VLC_TRUE;
 378                 }
 379                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 380                 PL_UNLOCK
 381                 return;
 382              }
 383              playlist_PlayItem( p_playlist, p_item );
 384          }
 385          else
 386          {
 387             p_playlist->status.i_status = PLAYLIST_STOPPED;
 388             if( p_playlist->status.p_item &&
 389                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 390             {
 391                 PL_DEBUG( "deleting item marked for deletion" );
 392                 playlist_ItemDelete( p_playlist->status.p_item );
 393                 p_playlist->status.p_item = NULL;
 394             }
 395
 396             /* Collect garbage */
 397             PL_UNLOCK;
 398             ObjectGarbageCollector( p_playlist );
 399             PL_LOCK;
 400         }
 401     }
 402     PL_UNLOCK
 403 }
 404
 405 /** Playlist dying last loop */
 406 void playlist_LastLoop( playlist_t *p_playlist )
 407 {
 408     vlc_object_t *p_obj;
 409
 410     /* If there is an input, kill it */
 411     while( 1 )
 412     {
 413         PL_LOCK
 414
 415         if( p_playlist->p_input == NULL )
 416         {
 417             PL_UNLOCK
 418             break;
 419         }
 420
 421         if( p_playlist->p_input->b_dead )
 422         {
 423             input_thread_t *p_input;
 424
 425             /* Unlink current input */
 426             p_input = p_playlist->p_input;
 427             p_playlist->p_input = NULL;
 428             PL_UNLOCK
 429
 430             /* Destroy input */
 431             input_DestroyThread( p_input );
 432             /* Unlink current input (_after_ input_DestroyThread for vout
 433              * garbage collector)*/
 434             vlc_object_detach( p_input );
 435
 436             /* Destroy object */
 437             vlc_object_destroy( p_input );
 438             continue;
 439         }
 440         else if( p_playlist->p_input->b_die )
 441         {
 442             /* This input is dying, leave it alone */
 443             ;
 444         }
 445         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 446         {
 447             input_StopThread( p_playlist->p_input );
 448             PL_UNLOCK
 449             continue;
 450         }
 451         else
 452         {
 453             p_playlist->p_input->b_eof = 1;
 454         }
 455
 456         PL_UNLOCK
 457
 458         msleep( INTF_IDLE_SLEEP );
 459     }
 460
 461     /* close all remaining sout */
 462     while( ( p_obj = vlc_object_find( p_playlist,
 463                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 464     {
 465         vlc_object_release( p_obj );
 466         sout_DeleteInstance( (sout_instance_t*)p_obj );
 467     }
 468
 469     /* close all remaining vout */
 470     while( ( p_obj = vlc_object_find( p_playlist,
 471                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 472     {
 473         vlc_object_detach( p_obj );
 474         vlc_object_release( p_obj );
 475         vout_Destroy( (vout_thread_t *)p_obj );
 476     }
 477 }
 478
 479 /** Main loop for preparser queue */
 480 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 481 {
 482     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 483     input_item_t *p_current;
 484     int i_activity;
 485     uint32_t i_m, i_o;
 486
 487     while( !p_playlist->b_die )
 488     {
 489         vlc_mutex_lock( &p_obj->object_lock );
 490         while( p_obj->i_waiting == 0 )
 491         {
 492             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 493             if( p_playlist->b_die )
 494             {
 495                 vlc_mutex_unlock( &p_obj->object_lock );
 496                 return;
 497             }
 498         }
 499
 500         p_current = p_obj->pp_waiting[0];
 501         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 502         vlc_mutex_unlock( &p_obj->object_lock );
 503
 504         PL_LOCK;
 505         if( p_current )
 506         {
 507             vlc_bool_t b_preparsed = VLC_FALSE;
 508             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
 509                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
 510                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
 511                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
 512                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
 513                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
 514                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
 515                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
 516             {
 517                 b_preparsed = VLC_TRUE;
 518                 stats_TimerStart( p_playlist, "Preparse run",
 519                                   STATS_TIMER_PREPARSE );
 520                 PL_UNLOCK;
 521                 input_Preparse( p_playlist, p_current );
 522                 PL_LOCK;
 523                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 524             }
 525             PL_UNLOCK;
 526             if( b_preparsed )
 527             {
 528                 p_current->p_meta->i_status |= ITEM_PREPARSED;
 529                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 530             }
 531             PL_LOCK;
 532
 533             /* If we haven't retrieved enough meta, add to secondary queue
 534              * which will run the "meta fetchers".
 535              * This only checks for meta, not for art
 536              * \todo don't do this for things we won't get meta for, like vids
 537              */
 538             if( p_current->p_meta &&
 539                 !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 540             {
 541                 preparse_item_t p;
 542                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
 543                 p.p_item = p_current;
 544                 p.b_fetch_art = VLC_FALSE;
 545                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 546                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 547                              p_playlist->p_fetcher->i_waiting,
 548                              p_playlist->p_fetcher->i_waiting, p);
 549                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 550                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 551             }
 552             /* We already have all needed meta, but we need art right now */
 553             else if( p_current->p_meta &&
 554                      p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 555                      EMPTY_STR( p_current->p_meta->psz_arturl ) )
 556             {
 557                 preparse_item_t p;
 558                 PL_DEBUG("meta ok for %s, need to fetch art",
 559                                                          p_current->psz_name );
 560                 p.p_item = p_current;
 561                 p.b_fetch_art = VLC_TRUE;
 562                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 563                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 564                              p_playlist->p_fetcher->i_waiting,
 565                              p_playlist->p_fetcher->i_waiting, p);
 566                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 567                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 568             }
 569             else
 570             {
 571                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 572                           p_current->psz_name,
 573                           p_current->p_meta ? p_current->p_meta->psz_arturl:
 574                                               "null" );
 575                 vlc_gc_decref( p_current );
 576             }
 577             PL_UNLOCK;
 578         }
 579         else
 580             PL_UNLOCK;
 581
 582         vlc_mutex_lock( &p_obj->object_lock );
 583         i_activity = var_GetInteger( p_playlist, "activity" );
 584         if( i_activity < 0 ) i_activity = 0;
 585         vlc_mutex_unlock( &p_obj->object_lock );
 586         /* Sleep at least 1ms */
 587         msleep( (i_activity+1) * 1000 );
 588     }
 589 }
 590
 591 /** Main loop for secondary preparser queue */
 592 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 593 {
 594     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 595     vlc_bool_t b_fetch_art;
 596     input_item_t *p_item;
 597     int i_activity;
 598
 599     while( !p_playlist->b_die )
 600     {
 601         vlc_mutex_lock( &p_obj->object_lock );
 602         while( p_obj->i_waiting == 0 )
 603         {
 604             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 605             if( p_playlist->b_die )
 606             {
 607                 vlc_mutex_unlock( &p_obj->object_lock );
 608                 return;
 609             }
 610         }
 611
 612         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 613         p_item = p_obj->p_waiting->p_item;
 614         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 615         vlc_mutex_unlock( &p_obj->object_lock );
 616         if( p_item )
 617         {
 618             assert( p_item->p_meta );
 619             if( !b_fetch_art )
 620             {
 621                 input_MetaFetch( p_playlist, p_item );
 622                 p_item->p_meta->i_status |= ITEM_META_FETCHED;
 623                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 624                 /*  Fetch right now */
 625                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 626                 {
 627                     vlc_mutex_lock( &p_obj->object_lock );
 628                     preparse_item_t p;
 629                     p.p_item = p_item;
 630                     p.b_fetch_art = VLC_TRUE;
 631                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 632                                  p_playlist->p_fetcher->i_waiting,
 633                                  0, p );
 634                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
 635                     vlc_mutex_unlock( &p_obj->object_lock );
 636                     continue;
 637                 }
 638                 else
 639                     vlc_gc_decref( p_item );
 640             }
 641             else
 642             {
 643                 int i_ret = input_ArtFind( p_playlist, p_item );
 644                 if( i_ret == 1 )
 645                 {
 646                     PL_DEBUG("downloading art for %s", p_item->psz_name );
 647                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 648                         p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 649                     else {
 650                         p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 651                         var_SetInteger( p_playlist, "item-change",
 652                                         p_item->i_id );
 653                     }
 654                 }
 655                 else if( i_ret == 0 ) /* Was in cache */
 656                 {
 657                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
 658                     p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 659                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 660                 }
 661                 else
 662                 {
 663                     PL_DEBUG("art not found for %s", p_item->psz_name );
 664                     p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 665                 }
 666                 vlc_gc_decref( p_item );
 667            }
 668         }
 669         vlc_mutex_lock( &p_obj->object_lock );
 670         i_activity = var_GetInteger( p_playlist, "activity" );
 671         if( i_activity < 0 ) i_activity = 0;
 672         vlc_mutex_unlock( &p_obj->object_lock );
 673         /* Sleep at least 1ms */
 674         msleep( (i_activity+1) * 1000 );
 675     }
 676 }
 677
 678 static void VariablesInit( playlist_t *p_playlist )
 679 {
 680     vlc_value_t val;
 681     /* These variables control updates */
 682     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 683     val.b_bool = VLC_TRUE;
 684     var_Set( p_playlist, "intf-change", val );
 685
 686     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 687     val.i_int = -1;
 688     var_Set( p_playlist, "item-change", val );
 689
 690     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 691     val.i_int = -1;
 692     var_Set( p_playlist, "item-deleted", val );
 693
 694     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 695
 696     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 697     val.i_int = -1;
 698     var_Set( p_playlist, "playlist-current", val );
 699
 700     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 701
 702     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 703     val.b_bool = VLC_TRUE;
 704     var_Set( p_playlist, "intf-show", val );
 705
 706     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 707     var_SetInteger( p_playlist, "activity", 0 );
 708
 709     /* Variables to control playback */
 710     var_CreateGetBool( p_playlist, "play-and-stop" );
 711     var_CreateGetBool( p_playlist, "play-and-exit" );
 712     var_CreateGetBool( p_playlist, "random" );
 713     var_CreateGetBool( p_playlist, "repeat" );
 714     var_CreateGetBool( p_playlist, "loop" );
 715
 716     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 717 }