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     vlc_object_attach( p_playlist, p_parent );
 153     b_save = p_playlist->b_auto_preparse;
 154     p_playlist->b_auto_preparse = VLC_FALSE;
 155     playlist_MLLoad( p_playlist );
 156     p_playlist->b_auto_preparse = VLC_TRUE;
 157     return p_playlist;
 158 }
 159
 160 void playlist_Destroy( playlist_t *p_playlist )
 161 {
 162     while( p_playlist->i_sds )
 163     {
 164         playlist_ServicesDiscoveryRemove( p_playlist,
 165                                           p_playlist->pp_sds[0]->psz_module );
 166     }
 167
 168     playlist_MLDump( p_playlist );
 169
 170     vlc_thread_join( p_playlist->p_preparse );
 171     vlc_thread_join( p_playlist->p_fetcher );
 172     vlc_thread_join( p_playlist );
 173
 174     vlc_object_detach( p_playlist->p_preparse );
 175     vlc_object_detach( p_playlist->p_fetcher );
 176
 177     var_Destroy( p_playlist, "intf-change" );
 178     var_Destroy( p_playlist, "item-change" );
 179     var_Destroy( p_playlist, "playlist-current" );
 180     var_Destroy( p_playlist, "intf-popmenu" );
 181     var_Destroy( p_playlist, "intf-show" );
 182     var_Destroy( p_playlist, "play-and-stop" );
 183     var_Destroy( p_playlist, "play-and-exit" );
 184     var_Destroy( p_playlist, "random" );
 185     var_Destroy( p_playlist, "repeat" );
 186     var_Destroy( p_playlist, "loop" );
 187     var_Destroy( p_playlist, "activity" );
 188
 189     PL_LOCK;
 190     /* Go through all items, and simply free everything without caring
 191      * about the tree structure. Do not decref, it will be done by doing
 192      * the same thing on the input items array */
 193     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 194         free( p_del->pp_children );
 195         free( p_del );
 196     FOREACH_END();
 197     ARRAY_RESET( p_playlist->all_items );
 198
 199     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 200         input_ItemClean( p_del );
 201         free( p_del );
 202     FOREACH_END();
 203     ARRAY_RESET( p_playlist->input_items );
 204
 205     ARRAY_RESET( p_playlist->items );
 206     ARRAY_RESET( p_playlist->current );
 207
 208     PL_UNLOCK;
 209
 210     vlc_mutex_destroy( &p_playlist->p_stats->lock );
 211     if( p_playlist->p_stats )
 212         free( p_playlist->p_stats );
 213
 214     vlc_mutex_destroy( &p_playlist->gc_lock );
 215     vlc_object_destroy( p_playlist->p_preparse );
 216     vlc_object_destroy( p_playlist->p_fetcher );
 217     vlc_object_detach( p_playlist );
 218     vlc_object_destroy( p_playlist );
 219 }
 220
 221 /* Destroy remaining objects */
 222 static void ObjectGarbageCollector( playlist_t *p_playlist )
 223 {
 224     vlc_object_t *p_obj;
 225
 226     if( mdate() - p_playlist->gc_date < 1000000 )
 227     {
 228         p_playlist->b_cant_sleep = VLC_TRUE;
 229         return;
 230     }
 231     else if( p_playlist->gc_date == 0 )
 232         return;
 233
 234     vlc_mutex_lock( &p_playlist->gc_lock );
 235     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 236                                                   FIND_CHILD ) ) )
 237     {
 238         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 239         {
 240             vlc_object_release( p_obj );
 241             break;
 242         }
 243         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 244         vlc_object_detach( p_obj );
 245         vlc_object_release( p_obj );
 246         vout_Destroy( (vout_thread_t *)p_obj );
 247     }
 248     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 249                                                   FIND_CHILD ) ) )
 250     {
 251         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 252         {
 253             vlc_object_release( p_obj );
 254             break;
 255         }
 256         vlc_object_release( p_obj );
 257         sout_DeleteInstance( (sout_instance_t*)p_obj );
 258     }
 259     p_playlist->b_cant_sleep = VLC_FALSE;
 260     vlc_mutex_unlock( &p_playlist->gc_lock );
 261 }
 262
 263 /** Main loop for the playlist */
 264 void playlist_MainLoop( playlist_t *p_playlist )
 265 {
 266     playlist_item_t *p_item = NULL;
 267     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 268     PL_LOCK;
 269
 270     if( p_playlist->b_reset_currently_playing &&
 271         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 272     {
 273         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
 274                              p_playlist->status.p_item );
 275         p_playlist->last_rebuild_date = mdate();
 276     }
 277
 278 check_input:
 279     /* If there is an input, check that it doesn't need to die. */
 280     if( p_playlist->p_input )
 281     {
 282         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 283         {
 284             PL_DEBUG( "incoming request - stopping current input" );
 285             input_StopThread( p_playlist->p_input );
 286         }
 287
 288         /* This input is dead. Remove it ! */
 289         if( p_playlist->p_input->b_dead )
 290         {
 291             int i_activity;
 292             input_thread_t *p_input;
 293             PL_DEBUG( "dead input" );
 294
 295             p_input = p_playlist->p_input;
 296             p_playlist->p_input = NULL;
 297
 298             /* Release the playlist lock, because we may get stuck
 299              * in input_DestroyThread() for some time. */
 300             PL_UNLOCK
 301
 302             /* Destroy input */
 303             input_DestroyThread( p_input );
 304
 305             /* Unlink current input
 306              * (_after_ input_DestroyThread for vout garbage collector) */
 307             vlc_object_detach( p_input );
 308
 309             /* Destroy object */
 310             vlc_object_destroy( p_input );
 311
 312             PL_LOCK;
 313
 314             p_playlist->gc_date = mdate();
 315             p_playlist->b_cant_sleep = VLC_TRUE;
 316
 317             if( p_playlist->status.p_item->i_flags
 318                 & PLAYLIST_REMOVE_FLAG )
 319             {
 320                  PL_DEBUG( "%s was marked for deletion, deleting",
 321                                  PLI_NAME( p_playlist->status.p_item  ) );
 322                  playlist_ItemDelete( p_playlist->status.p_item );
 323                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 324                      p_playlist->request.p_item = NULL;
 325                  p_playlist->status.p_item = NULL;
 326             }
 327
 328             i_activity= var_GetInteger( p_playlist, "activity") ;
 329             var_SetInteger( p_playlist, "activity", i_activity -
 330                             DEFAULT_INPUT_ACTIVITY );
 331             goto check_input;
 332         }
 333         /* This input is dying, let it do */
 334         else if( p_playlist->p_input->b_die )
 335         {
 336             PL_DEBUG( "dying input" );
 337             msleep( 25000 ); // 25 ms
 338             goto check_input;
 339         }
 340         /* This input has finished, ask it to die ! */
 341         else if( p_playlist->p_input->b_error
 342                   || p_playlist->p_input->b_eof )
 343         {
 344             PL_DEBUG( "finished input" );
 345             input_StopThread( p_playlist->p_input );
 346             /* No need to wait here, we'll wait in the p_input->b_die case */
 347             goto check_input;
 348         }
 349         else if( p_playlist->p_input->i_state != INIT_S )
 350         {
 351             PL_UNLOCK;
 352             ObjectGarbageCollector( p_playlist );
 353             PL_LOCK;
 354         }
 355     }
 356     else
 357     {
 358         /* No input. Several cases
 359          *  - No request, running status -> start new item
 360          *  - No request, stopped status -> collect garbage
 361          *  - Request, running requested -> start new item
 362          *  - Request, stopped requested -> collect garbage
 363          */
 364          if( (!p_playlist->request.b_request &&
 365               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 366               ( p_playlist->request.b_request &&
 367                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 368          {
 369              msg_Dbg( p_playlist, "starting new item" );
 370              p_item = playlist_NextItem( p_playlist );
 371
 372              if( p_item == NULL )
 373              {
 374                 msg_Dbg( p_playlist, "nothing to play" );
 375                 if( b_playexit == VLC_TRUE )
 376                 {
 377                     msg_Info( p_playlist, "end of playlist, exiting" );
 378                     p_playlist->p_libvlc->b_die = VLC_TRUE;
 379                 }
 380                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 381                 PL_UNLOCK
 382                 return;
 383              }
 384              playlist_PlayItem( p_playlist, p_item );
 385          }
 386          else
 387          {
 388             p_playlist->status.i_status = PLAYLIST_STOPPED;
 389             if( p_playlist->status.p_item &&
 390                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 391             {
 392                 PL_DEBUG( "deleting item marked for deletion" );
 393                 playlist_ItemDelete( p_playlist->status.p_item );
 394                 p_playlist->status.p_item = NULL;
 395             }
 396
 397             /* Collect garbage */
 398             PL_UNLOCK;
 399             ObjectGarbageCollector( p_playlist );
 400             PL_LOCK;
 401         }
 402     }
 403     PL_UNLOCK
 404 }
 405
 406 /** Playlist dying last loop */
 407 void playlist_LastLoop( playlist_t *p_playlist )
 408 {
 409     vlc_object_t *p_obj;
 410
 411     /* If there is an input, kill it */
 412     while( 1 )
 413     {
 414         PL_LOCK
 415
 416         if( p_playlist->p_input == NULL )
 417         {
 418             PL_UNLOCK
 419             break;
 420         }
 421
 422         if( p_playlist->p_input->b_dead )
 423         {
 424             input_thread_t *p_input;
 425
 426             /* Unlink current input */
 427             p_input = p_playlist->p_input;
 428             p_playlist->p_input = NULL;
 429             PL_UNLOCK
 430
 431             /* Destroy input */
 432             input_DestroyThread( p_input );
 433             /* Unlink current input (_after_ input_DestroyThread for vout
 434              * garbage collector)*/
 435             vlc_object_detach( p_input );
 436
 437             /* Destroy object */
 438             vlc_object_destroy( p_input );
 439             continue;
 440         }
 441         else if( p_playlist->p_input->b_die )
 442         {
 443             /* This input is dying, leave it alone */
 444             ;
 445         }
 446         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 447         {
 448             input_StopThread( p_playlist->p_input );
 449             PL_UNLOCK
 450             continue;
 451         }
 452         else
 453         {
 454             p_playlist->p_input->b_eof = 1;
 455         }
 456
 457         PL_UNLOCK
 458
 459         msleep( INTF_IDLE_SLEEP );
 460     }
 461
 462     /* close all remaining sout */
 463     while( ( p_obj = vlc_object_find( p_playlist,
 464                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 465     {
 466         vlc_object_release( p_obj );
 467         sout_DeleteInstance( (sout_instance_t*)p_obj );
 468     }
 469
 470     /* close all remaining vout */
 471     while( ( p_obj = vlc_object_find( p_playlist,
 472                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 473     {
 474         vlc_object_detach( p_obj );
 475         vlc_object_release( p_obj );
 476         vout_Destroy( (vout_thread_t *)p_obj );
 477     }
 478 }
 479
 480 /** Main loop for preparser queue */
 481 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 482 {
 483     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 484     input_item_t *p_current;
 485     int i_activity;
 486     uint32_t i_m, i_o;
 487
 488     while( !p_playlist->b_die )
 489     {
 490         vlc_mutex_lock( &p_obj->object_lock );
 491         while( p_obj->i_waiting == 0 )
 492         {
 493             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 494             if( p_playlist->b_die )
 495             {
 496                 vlc_mutex_unlock( &p_obj->object_lock );
 497                 return;
 498             }
 499         }
 500
 501         p_current = p_obj->pp_waiting[0];
 502         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 503         vlc_mutex_unlock( &p_obj->object_lock );
 504
 505         PL_LOCK;
 506         if( p_current )
 507         {
 508             vlc_bool_t b_preparsed = VLC_FALSE;
 509             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
 510                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
 511                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
 512                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
 513                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
 514                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
 515                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
 516                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
 517             {
 518                 b_preparsed = VLC_TRUE;
 519                 stats_TimerStart( p_playlist, "Preparse run",
 520                                   STATS_TIMER_PREPARSE );
 521                 PL_UNLOCK;
 522                 input_Preparse( p_playlist, p_current );
 523                 PL_LOCK;
 524                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 525             }
 526             PL_UNLOCK;
 527             if( b_preparsed )
 528             {
 529                 p_current->p_meta->i_status |= ITEM_PREPARSED;
 530                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 531             }
 532             PL_LOCK;
 533
 534             /* If we haven't retrieved enough meta, add to secondary queue
 535              * which will run the "meta fetchers".
 536              * This only checks for meta, not for art
 537              * \todo don't do this for things we won't get meta for, like vids
 538              */
 539             if( p_current->p_meta &&
 540                 !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 541             {
 542                 preparse_item_t p;
 543                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
 544                 p.p_item = p_current;
 545                 p.b_fetch_art = VLC_FALSE;
 546                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 547                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 548                              p_playlist->p_fetcher->i_waiting,
 549                              p_playlist->p_fetcher->i_waiting, p);
 550                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 551                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 552             }
 553             /* We already have all needed meta, but we need art right now */
 554             else if( p_current->p_meta &&
 555                      p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 556                      EMPTY_STR( p_current->p_meta->psz_arturl ) )
 557             {
 558                 preparse_item_t p;
 559                 PL_DEBUG("meta ok for %s, need to fetch art",
 560                                                          p_current->psz_name );
 561                 p.p_item = p_current;
 562                 p.b_fetch_art = VLC_TRUE;
 563                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 564                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 565                              p_playlist->p_fetcher->i_waiting,
 566                              p_playlist->p_fetcher->i_waiting, p);
 567                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 568                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 569             }
 570             else
 571             {
 572                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 573                           p_current->psz_name,
 574                           p_current->p_meta ? p_current->p_meta->psz_arturl:
 575                                               "null" );
 576                 vlc_gc_decref( p_current );
 577             }
 578             PL_UNLOCK;
 579         }
 580         else
 581             PL_UNLOCK;
 582
 583         vlc_mutex_lock( &p_obj->object_lock );
 584         i_activity = var_GetInteger( p_playlist, "activity" );
 585         if( i_activity < 0 ) i_activity = 0;
 586         vlc_mutex_unlock( &p_obj->object_lock );
 587         /* Sleep at least 1ms */
 588         msleep( (i_activity+1) * 1000 );
 589     }
 590 }
 591
 592 /** Main loop for secondary preparser queue */
 593 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 594 {
 595     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 596     vlc_bool_t b_fetch_art;
 597     input_item_t *p_item;
 598     int i_activity;
 599
 600     while( !p_playlist->b_die )
 601     {
 602         vlc_mutex_lock( &p_obj->object_lock );
 603         while( p_obj->i_waiting == 0 )
 604         {
 605             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 606             if( p_playlist->b_die )
 607             {
 608                 vlc_mutex_unlock( &p_obj->object_lock );
 609                 return;
 610             }
 611         }
 612
 613         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 614         p_item = p_obj->p_waiting->p_item;
 615         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 616         vlc_mutex_unlock( &p_obj->object_lock );
 617         if( p_item )
 618         {
 619             assert( p_item->p_meta );
 620             if( !b_fetch_art )
 621             {
 622                 input_MetaFetch( p_playlist, p_item );
 623                 p_item->p_meta->i_status |= ITEM_META_FETCHED;
 624                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 625                 /*  Fetch right now */
 626                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 627                 {
 628                     vlc_mutex_lock( &p_obj->object_lock );
 629                     preparse_item_t p;
 630                     p.p_item = p_item;
 631                     p.b_fetch_art = VLC_TRUE;
 632                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 633                                  p_playlist->p_fetcher->i_waiting,
 634                                  0, p );
 635                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
 636                     vlc_mutex_unlock( &p_obj->object_lock );
 637                     continue;
 638                 }
 639                 else
 640                     vlc_gc_decref( p_item );
 641             }
 642             else
 643             {
 644                 int i_ret = input_ArtFind( p_playlist, p_item );
 645                 if( i_ret == 1 )
 646                 {
 647                     PL_DEBUG("downloading art for %s", p_item->psz_name );
 648                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 649                         p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 650                     else {
 651                         p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 652                         var_SetInteger( p_playlist, "item-change",
 653                                         p_item->i_id );
 654                     }
 655                 }
 656                 else if( i_ret == 0 ) /* Was in cache */
 657                 {
 658                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
 659                     p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 660                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 661                 }
 662                 else
 663                 {
 664                     PL_DEBUG("art not found for %s", p_item->psz_name );
 665                     p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
 666                 }
 667                 vlc_gc_decref( p_item );
 668            }
 669         }
 670         vlc_mutex_lock( &p_obj->object_lock );
 671         i_activity = var_GetInteger( p_playlist, "activity" );
 672         if( i_activity < 0 ) i_activity = 0;
 673         vlc_mutex_unlock( &p_obj->object_lock );
 674         /* Sleep at least 1ms */
 675         msleep( (i_activity+1) * 1000 );
 676     }
 677 }
 678
 679 static void VariablesInit( playlist_t *p_playlist )
 680 {
 681     vlc_value_t val;
 682     /* These variables control updates */
 683     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 684     val.b_bool = VLC_TRUE;
 685     var_Set( p_playlist, "intf-change", val );
 686
 687     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 688     val.i_int = -1;
 689     var_Set( p_playlist, "item-change", val );
 690
 691     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 692     val.i_int = -1;
 693     var_Set( p_playlist, "item-deleted", val );
 694
 695     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 696
 697     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 698     val.i_int = -1;
 699     var_Set( p_playlist, "playlist-current", val );
 700
 701     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 702
 703     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 704     val.b_bool = VLC_TRUE;
 705     var_Set( p_playlist, "intf-show", val );
 706
 707     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 708     var_SetInteger( p_playlist, "activity", 0 );
 709
 710     /* Variables to control playback */
 711     var_CreateGetBool( p_playlist, "play-and-stop" );
 712     var_CreateGetBool( p_playlist, "play-and-exit" );
 713     var_CreateGetBool( p_playlist, "random" );
 714     var_CreateGetBool( p_playlist, "repeat" );
 715     var_CreateGetBool( p_playlist, "loop" );
 716
 717     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 718 }