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