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) 1999-2008 the VideoLAN team
   5  *
   6  * Authors: Samuel Hocevar <sam@zoy.org>
   7  *          Clément Stenac <zorglub@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <assert.h>
  29 #include <vlc_common.h>
  30 #include <vlc_sout.h>
  31 #include <vlc_playlist.h>
  32 #include <vlc_interface.h>
  33 #include "playlist_internal.h"
  34 #include "stream_output/stream_output.h" /* sout_DeleteInstance */
  35
  36 /*****************************************************************************
  37  * Local prototypes
  38  *****************************************************************************/
  39 static void VariablesInit( playlist_t *p_playlist );
  40 static void playlist_Destructor( vlc_object_t * p_this );
  41 static void playlist_Destructor( vlc_object_t * p_this );
  42
  43 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  44                            vlc_value_t oldval, vlc_value_t newval, void *a )
  45 {
  46     (void)psz_cmd; (void)oldval; (void)newval; (void)a;
  47
  48     ((playlist_t*)p_this)->b_reset_currently_playing = true;
  49     playlist_Signal( ((playlist_t*)p_this) );
  50     return VLC_SUCCESS;
  51 }
  52
  53 /**
  54  * Create playlist
  55  *
  56  * Create a playlist structure.
  57  * \param p_parent the vlc object that is to be the parent of this playlist
  58  * \return a pointer to the created playlist, or NULL on error
  59  */
  60 playlist_t * playlist_Create( vlc_object_t *p_parent )
  61 {
  62     static const char playlist_name[] = "playlist";
  63     playlist_t *p_playlist;
  64     bool b_save;
  65
  66     /* Allocate structure */
  67     p_playlist = vlc_custom_create( p_parent, sizeof( *p_playlist ),
  68                                     VLC_OBJECT_GENERIC, playlist_name );
  69     if( !p_playlist )
  70         return NULL;
  71
  72     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
  73
  74     libvlc_priv(p_parent->p_libvlc)->p_playlist = p_playlist;
  75
  76     VariablesInit( p_playlist );
  77
  78     /* Initialise data structures */
  79     vlc_mutex_init( &p_playlist->gc_lock );
  80     p_playlist->i_last_playlist_id = 0;
  81     p_playlist->p_input = NULL;
  82
  83     p_playlist->gc_date = 0;
  84     p_playlist->b_cant_sleep = false;
  85
  86     ARRAY_INIT( p_playlist->items );
  87     ARRAY_INIT( p_playlist->all_items );
  88     ARRAY_INIT( p_playlist->current );
  89
  90     p_playlist->i_current_index = 0;
  91     p_playlist->b_reset_currently_playing = true;
  92     p_playlist->last_rebuild_date = 0;
  93
  94     p_playlist->b_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  95
  96     p_playlist->b_doing_ml = false;
  97
  98     p_playlist->b_auto_preparse =
  99                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
 100
 101     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 102                                     0, NULL );
 103     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 104                                     0, p_playlist->p_root_category->p_input );
 105
 106     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 107         return NULL;
 108
 109     /* Create playlist and media library */
 110     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 111                             &p_playlist->p_local_category,
 112                             &p_playlist->p_local_onelevel, false );
 113
 114     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 115     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 116
 117     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 118         !p_playlist->p_local_category->p_input ||
 119         !p_playlist->p_local_onelevel->p_input )
 120         return NULL;
 121
 122     if( config_GetInt( p_playlist, "media-library") )
 123     {
 124         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 125                             &p_playlist->p_ml_category,
 126                             &p_playlist->p_ml_onelevel, false );
 127
 128         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 129             return NULL;
 130
 131         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 132         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 133     }
 134     else
 135     {
 136         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 137     }
 138
 139     /* Initial status */
 140     p_playlist->status.p_item = NULL;
 141     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 142     p_playlist->request.b_request = false;
 143     p_playlist->status.i_status = PLAYLIST_STOPPED;
 144
 145     p_playlist->i_sort = SORT_ID;
 146     p_playlist->i_order = ORDER_NORMAL;
 147
 148
 149     b_save = p_playlist->b_auto_preparse;
 150     p_playlist->b_auto_preparse = false;
 151     playlist_MLLoad( p_playlist );
 152     p_playlist->b_auto_preparse = true;
 153
 154     vlc_object_set_destructor( p_playlist, playlist_Destructor );
 155
 156     return p_playlist;
 157 }
 158
 159 /**
 160  * Destroy playlist
 161  *
 162  * Destroy a playlist structure.
 163  * \param p_playlist the playlist object
 164  * \return nothing
 165  */
 166
 167 static void playlist_Destructor( vlc_object_t * p_this )
 168 {
 169     playlist_t * p_playlist = (playlist_t *)p_this;
 170
 171     if( p_playlist->p_preparse )
 172         vlc_object_release( p_playlist->p_preparse );
 173
 174     if( p_playlist->p_fetcher )
 175         vlc_object_release( p_playlist->p_fetcher );
 176
 177     msg_Dbg( p_this, "Destroyed" );
 178 }
 179
 180 /* Destroy remaining objects */
 181 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
 182 {
 183     if( !b_force )
 184     {
 185         if( mdate() - p_playlist->gc_date < 1000000 )
 186         {
 187             p_playlist->b_cant_sleep = true;
 188             return;
 189         }
 190         else if( p_playlist->gc_date == 0 )
 191             return;
 192     }
 193
 194     vlc_mutex_lock( &p_playlist->gc_lock );
 195     p_playlist->b_cant_sleep = false;
 196     vlc_mutex_unlock( &p_playlist->gc_lock );
 197 }
 198
 199 /* Input Callback */
 200 static void input_state_changed( const vlc_event_t * event, void * data )
 201 {
 202     (void)event;
 203     playlist_t * p_playlist = data;
 204     playlist_Signal( p_playlist );
 205 }
 206
 207 /* Input Callback */
 208 static void input_selected_stream_changed( const vlc_event_t * event, void * data )
 209 {
 210     (void)event;
 211     playlist_t * p_playlist = data;
 212     PL_LOCK;
 213     p_playlist->gc_date = mdate();
 214     vlc_object_signal_unlocked( p_playlist );
 215     PL_UNLOCK;
 216 }
 217
 218 /* Internals */
 219 void playlist_release_current_input( playlist_t * p_playlist )
 220 {
 221     vlc_assert_locked( &(vlc_internals(p_playlist)->lock) );
 222
 223     if( !p_playlist->p_input ) return;
 224
 225     input_thread_t * p_input = p_playlist->p_input;
 226     vlc_event_manager_t * p_em = input_get_event_manager( p_input );
 227
 228     vlc_event_detach( p_em, vlc_InputStateChanged,
 229                       input_state_changed, p_playlist );
 230     vlc_event_detach( p_em, vlc_InputSelectedStreamChanged,
 231                       input_selected_stream_changed, p_playlist );
 232     p_playlist->p_input = NULL;
 233
 234     /* Release the playlist lock, because we may get stuck
 235      * in vlc_object_release() for some time. */
 236     PL_UNLOCK;
 237     vlc_object_release( p_input );
 238     PL_LOCK;
 239 }
 240
 241 void playlist_set_current_input(
 242     playlist_t * p_playlist, input_thread_t * p_input )
 243 {
 244     vlc_assert_locked( &(vlc_internals(p_playlist)->lock) );
 245
 246     playlist_release_current_input( p_playlist );
 247
 248     if( p_input )
 249     {
 250         vlc_object_yield( p_input );
 251         p_playlist->p_input = p_input;
 252         vlc_event_manager_t * p_em = input_get_event_manager( p_input );
 253         vlc_event_attach( p_em, vlc_InputStateChanged,
 254                           input_state_changed, p_playlist );
 255         vlc_event_attach( p_em, vlc_InputSelectedStreamChanged,
 256                           input_selected_stream_changed, p_playlist );
 257     }
 258 }
 259
 260 /** Get current playing input.
 261  */
 262 input_thread_t * playlist_CurrentInput( playlist_t * p_playlist )
 263 {
 264     input_thread_t * p_input;
 265     PL_LOCK;
 266     p_input = p_playlist->p_input;
 267     if( p_input ) vlc_object_yield( p_input );
 268     PL_UNLOCK;
 269     return p_input;
 270 }
 271
 272
 273 /**
 274  * @}
 275  */
 276
 277 /**
 278  * Main loop
 279  *
 280  * Main loop for the playlist
 281  * \param p_playlist the playlist object
 282  * \return nothing
 283  */
 284 void playlist_MainLoop( playlist_t *p_playlist )
 285 {
 286     playlist_item_t *p_item = NULL;
 287     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 288     PL_LOCK;
 289
 290     if( p_playlist->b_reset_currently_playing &&
 291         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 292     {
 293         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 294                              p_playlist->status.p_item );
 295         p_playlist->last_rebuild_date = mdate();
 296     }
 297
 298 check_input:
 299     /* If there is an input, check that it doesn't need to die. */
 300     if( p_playlist->p_input )
 301     {
 302         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 303         {
 304             PL_DEBUG( "incoming request - stopping current input" );
 305             input_StopThread( p_playlist->p_input );
 306         }
 307
 308         /* This input is dead. Remove it ! */
 309         if( p_playlist->p_input->b_dead )
 310         {
 311             int i_activity;
 312             input_thread_t *p_input;
 313             sout_instance_t **pp_sout =
 314                 &libvlc_priv(p_playlist->p_libvlc)->p_sout;
 315
 316             PL_DEBUG( "dead input" );
 317
 318             p_input = p_playlist->p_input;
 319
 320             assert( *pp_sout == NULL );
 321             if( var_CreateGetBool( p_input, "sout-keep" ) )
 322                 *pp_sout = input_DetachSout( p_input );
 323
 324             /* Destroy input */
 325             playlist_release_current_input( p_playlist );
 326
 327             p_playlist->gc_date = mdate();
 328             p_playlist->b_cant_sleep = true;
 329
 330             if( p_playlist->status.p_item->i_flags
 331                 & PLAYLIST_REMOVE_FLAG )
 332             {
 333                  PL_DEBUG( "%s was marked for deletion, deleting",
 334                                  PLI_NAME( p_playlist->status.p_item  ) );
 335                  playlist_ItemDelete( p_playlist->status.p_item );
 336                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 337                      p_playlist->request.p_item = NULL;
 338                  p_playlist->status.p_item = NULL;
 339             }
 340
 341             i_activity= var_GetInteger( p_playlist, "activity" );
 342             var_SetInteger( p_playlist, "activity", i_activity -
 343                             DEFAULT_INPUT_ACTIVITY );
 344
 345             goto check_input;
 346         }
 347         /* This input is dying, let it do */
 348         else if( p_playlist->p_input->b_die )
 349         {
 350             PL_DEBUG( "dying input" );
 351             PL_UNLOCK;
 352             msleep( INTF_IDLE_SLEEP );
 353             PL_LOCK;
 354             goto check_input;
 355         }
 356         /* This input has finished, ask it to die ! */
 357         else if( p_playlist->p_input->b_error
 358                   || p_playlist->p_input->b_eof )
 359         {
 360             PL_DEBUG( "finished input" );
 361             input_StopThread( p_playlist->p_input );
 362             /* No need to wait here, we'll wait in the p_input->b_die case */
 363             goto check_input;
 364         }
 365         else if( p_playlist->p_input->i_state != INIT_S )
 366         {
 367             PL_UNLOCK;
 368             ObjectGarbageCollector( p_playlist, false );
 369             PL_LOCK;
 370         }
 371     }
 372     else
 373     {
 374         /* No input. Several cases
 375          *  - No request, running status -> start new item
 376          *  - No request, stopped status -> collect garbage
 377          *  - Request, running requested -> start new item
 378          *  - Request, stopped requested -> collect garbage
 379         */
 380         int i_status = p_playlist->request.b_request ?
 381             p_playlist->request.i_status : p_playlist->status.i_status;
 382         if( i_status != PLAYLIST_STOPPED )
 383         {
 384             msg_Dbg( p_playlist, "starting new item" );
 385             p_item = playlist_NextItem( p_playlist );
 386
 387             if( p_item == NULL )
 388             {
 389                 msg_Dbg( p_playlist, "nothing to play" );
 390                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 391                 PL_UNLOCK;
 392
 393                 if( b_playexit == true )
 394                 {
 395                     msg_Info( p_playlist, "end of playlist, exiting" );
 396                     vlc_object_kill( p_playlist->p_libvlc );
 397                 }
 398                 ObjectGarbageCollector( p_playlist, true );
 399                 return;
 400              }
 401              playlist_PlayItem( p_playlist, p_item );
 402          }
 403          else
 404          {
 405             const bool b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 406
 407             p_playlist->status.i_status = PLAYLIST_STOPPED;
 408             if( p_playlist->status.p_item &&
 409                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 410             {
 411                 PL_DEBUG( "deleting item marked for deletion" );
 412                 playlist_ItemDelete( p_playlist->status.p_item );
 413                 p_playlist->status.p_item = NULL;
 414             }
 415
 416             /* Collect garbage */
 417             PL_UNLOCK;
 418             ObjectGarbageCollector( p_playlist, b_gc_forced );
 419             PL_LOCK;
 420         }
 421     }
 422     PL_UNLOCK;
 423 }
 424
 425 /**
 426  * Last loop
 427  *
 428  * The playlist is dying so do the last loop
 429  * \param p_playlist the playlist object
 430  * \return nothing
 431 */
 432 void playlist_LastLoop( playlist_t *p_playlist )
 433 {
 434     /* If there is an input, kill it */
 435     while( 1 )
 436     {
 437         PL_LOCK;
 438         if( p_playlist->p_input == NULL )
 439         {
 440             PL_UNLOCK;
 441             break;
 442         }
 443
 444         if( p_playlist->p_input->b_dead )
 445         {
 446             /* remove input */
 447             playlist_release_current_input( p_playlist );
 448
 449             /* sout-keep: no need to anything here.
 450              * The last input will destroy its sout, if any, by itself */
 451
 452             PL_UNLOCK;
 453             continue;
 454         }
 455         else if( p_playlist->p_input->b_die )
 456         {
 457             /* This input is dying, leave it alone */
 458             ;
 459         }
 460         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 461         {
 462             input_StopThread( p_playlist->p_input );
 463             PL_UNLOCK;
 464             continue;
 465         }
 466         else
 467         {
 468             p_playlist->p_input->b_eof = 1;
 469         }
 470         PL_UNLOCK;
 471
 472         msleep( INTF_IDLE_SLEEP );
 473     }
 474
 475 #ifdef ENABLE_SOUT
 476     /* close the remaining sout-keep (if there was no input atm) */
 477     sout_instance_t *p_sout = libvlc_priv (p_playlist->p_libvlc)->p_sout;
 478     if (p_sout)
 479         sout_DeleteInstance( p_sout );
 480 #endif
 481
 482     if( p_playlist->status.p_node &&
 483         p_playlist->status.p_node->i_flags & PLAYLIST_REMOVE_FLAG )
 484     {
 485          PL_DEBUG( "%s was marked for deletion, deleting",
 486                          PLI_NAME( p_playlist->status.p_node  ) );
 487          playlist_ItemDelete( p_playlist->status.p_node );
 488          p_playlist->status.p_node = NULL;
 489     }
 490     if( p_playlist->status.p_item &&
 491         p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 492     {
 493          PL_DEBUG( "%s was marked for deletion, deleting",
 494                          PLI_NAME( p_playlist->status.p_item  ) );
 495          playlist_ItemDelete( p_playlist->status.p_item );
 496          p_playlist->status.p_item = NULL;
 497     }
 498
 499     /* Core should have terminated all SDs before the playlist */
 500     /* TODO: It fails to do so when not playing anything -- Courmisch */
 501     playlist_ServicesDiscoveryKillAll( p_playlist );
 502     playlist_MLDump( p_playlist );
 503
 504     PL_LOCK;
 505     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 506         free( p_del->pp_children );
 507         vlc_gc_decref( p_del->p_input );
 508         free( p_del );
 509     FOREACH_END();
 510     ARRAY_RESET( p_playlist->all_items );
 511
 512     ARRAY_RESET( p_playlist->items );
 513     ARRAY_RESET( p_playlist->current );
 514
 515     PL_UNLOCK;
 516 }
 517
 518 /**
 519  * Preparse loop
 520  *
 521  * Main loop for preparser queue
 522  * \param p_obj items to preparse
 523  * \return nothing
 524  */
 525 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 526 {
 527     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 528     input_item_t *p_current;
 529     int i_activity;
 530
 531     vlc_object_lock( p_obj );
 532
 533     while( vlc_object_alive( p_obj ) )
 534     {
 535         if( p_obj->i_waiting == 0 )
 536         {
 537             vlc_object_wait( p_obj );
 538             continue;
 539         }
 540
 541         p_current = p_obj->pp_waiting[0];
 542         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 543         vlc_object_unlock( p_obj );
 544
 545         PL_LOCK;
 546         if( p_current )
 547         {
 548             if( p_current->i_type == ITEM_TYPE_FILE )
 549             {
 550                 stats_TimerStart( p_playlist, "Preparse run",
 551                                   STATS_TIMER_PREPARSE );
 552                 /* Do not preparse if it is already done (like by playing it) */
 553                 if( !input_item_IsPreparsed( p_current ) )
 554                 {
 555                     PL_UNLOCK;
 556                     input_Preparse( p_playlist, p_current );
 557                     PL_LOCK;
 558                 }
 559                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 560                 PL_UNLOCK;
 561                 input_item_SetPreparsed( p_current, true );
 562                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 563                 PL_LOCK;
 564             }
 565             /* If we haven't retrieved enough meta, add to secondary queue
 566              * which will run the "meta fetchers".
 567              * This only checks for meta, not for art
 568              * \todo don't do this for things we won't get meta for, like vids
 569              */
 570             char *psz_arturl = input_item_GetArtURL( p_current );
 571             char *psz_name = input_item_GetName( p_current );
 572             if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 573                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 574             {
 575                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 576                 vlc_object_lock( p_playlist->p_fetcher );
 577                 INSERT_ELEM( p_playlist->p_fetcher->pp_waiting,
 578                              p_playlist->p_fetcher->i_waiting,
 579                              p_playlist->p_fetcher->i_waiting, p_current);
 580                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 581                 vlc_object_unlock( p_playlist->p_fetcher );
 582             }
 583             else
 584             {
 585                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 586                           psz_name, psz_arturl );
 587                 vlc_gc_decref( p_current );
 588             }
 589             free( psz_name );
 590             free( psz_arturl );
 591             PL_UNLOCK;
 592         }
 593         else
 594             PL_UNLOCK;
 595
 596         vlc_object_lock( p_obj );
 597         i_activity = var_GetInteger( p_playlist, "activity" );
 598         if( i_activity < 0 ) i_activity = 0;
 599         vlc_object_unlock( p_obj );
 600         /* Sleep at least 1ms */
 601         msleep( (i_activity+1) * 1000 );
 602         vlc_object_lock( p_obj );
 603     }
 604     vlc_object_unlock( p_obj );
 605 }
 606
 607 /**
 608  * Fetcher loop
 609  *
 610  * Main loop for secondary preparser queue
 611  * \param p_obj items to preparse
 612  * \return nothing
 613  */
 614 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 615 {
 616     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 617     input_item_t *p_item;
 618     int i_activity;
 619
 620     vlc_object_lock( p_obj );
 621
 622     while( vlc_object_alive( p_obj ) )
 623     {
 624         if( p_obj->i_waiting == 0 )
 625         {
 626             vlc_object_wait( p_obj );
 627             continue;
 628         }
 629
 630         p_item = p_obj->pp_waiting[0];
 631         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 632         vlc_object_unlock( p_obj );
 633         if( p_item )
 634         {
 635             int i_ret;
 636
 637             /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 638              * (This can happen if we fetch art on play)
 639              * FIXME this doesn't work if we need to fetch meta before art ... */
 640             for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 641             {
 642                 bool b_break;
 643                 PL_LOCK;
 644                 b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 645                             p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 646                 PL_UNLOCK;
 647                 if( b_break )
 648                     break;
 649                 msleep( 50000 );
 650             }
 651
 652             i_ret = input_ArtFind( p_playlist, p_item );
 653             if( i_ret == 1 )
 654             {
 655                 PL_DEBUG( "downloading art for %s", p_item->psz_name );
 656                 if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 657                     input_item_SetArtNotFound( p_item, true );
 658                 else {
 659                     input_item_SetArtFetched( p_item, true );
 660                     var_SetInteger( p_playlist, "item-change",
 661                                     p_item->i_id );
 662                 }
 663             }
 664             else if( i_ret == 0 ) /* Was in cache */
 665             {
 666                 PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 667                 input_item_SetArtFetched( p_item, true );
 668                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 669             }
 670             else
 671             {
 672                 PL_DEBUG( "art not found for %s", p_item->psz_name );
 673                 input_item_SetArtNotFound( p_item, true );
 674             }
 675             vlc_gc_decref( p_item );
 676         }
 677         vlc_object_lock( p_obj );
 678         i_activity = var_GetInteger( p_playlist, "activity" );
 679         if( i_activity < 0 ) i_activity = 0;
 680         vlc_object_unlock( p_obj );
 681         /* Sleep at least 1ms */
 682         msleep( (i_activity+1) * 1000 );
 683         vlc_object_lock( p_obj );
 684     }
 685     vlc_object_unlock( p_obj );
 686 }
 687
 688 static void VariablesInit( playlist_t *p_playlist )
 689 {
 690     vlc_value_t val;
 691     /* These variables control updates */
 692     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 693     val.b_bool = true;
 694     var_Set( p_playlist, "intf-change", val );
 695
 696     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 697     val.i_int = -1;
 698     var_Set( p_playlist, "item-change", val );
 699
 700     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 701     val.i_int = -1;
 702     var_Set( p_playlist, "item-deleted", val );
 703
 704     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 705
 706     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 707     val.i_int = -1;
 708     var_Set( p_playlist, "playlist-current", val );
 709
 710     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 711     var_SetInteger( p_playlist, "activity", 0 );
 712
 713     /* Variables to control playback */
 714     var_CreateGetBool( p_playlist, "play-and-stop" );
 715     var_CreateGetBool( p_playlist, "play-and-exit" );
 716     var_CreateGetBool( p_playlist, "random" );
 717     var_CreateGetBool( p_playlist, "repeat" );
 718     var_CreateGetBool( p_playlist, "loop" );
 719
 720     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 721 }