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
 178 /* Destroy remaining objects */
 179 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
 180 {
 181     if( !b_force )
 182     {
 183         if( mdate() - p_playlist->gc_date < 1000000 )
 184         {
 185             p_playlist->b_cant_sleep = true;
 186             return;
 187         }
 188         else if( p_playlist->gc_date == 0 )
 189             return;
 190     }
 191
 192     vlc_mutex_lock( &p_playlist->gc_lock );
 193     p_playlist->b_cant_sleep = false;
 194     vlc_mutex_unlock( &p_playlist->gc_lock );
 195 }
 196
 197 /* Input Callback */
 198 static void input_state_changed( const vlc_event_t * event, void * data )
 199 {
 200     (void)event;
 201     playlist_t * p_playlist = data;
 202     playlist_Signal( p_playlist );
 203 }
 204
 205 /* Input Callback */
 206 static void input_selected_stream_changed( const vlc_event_t * event, void * data )
 207 {
 208     (void)event;
 209     playlist_t * p_playlist = data;
 210     PL_LOCK;
 211     p_playlist->gc_date = mdate();
 212     vlc_object_signal_unlocked( p_playlist );
 213     PL_UNLOCK;
 214 }
 215
 216 /* Internals */
 217 void playlist_release_current_input( playlist_t * p_playlist )
 218 {
 219     vlc_assert_locked( &(vlc_internals(p_playlist)->lock) );
 220
 221     if( !p_playlist->p_input ) return;
 222
 223     input_thread_t * p_input = p_playlist->p_input;
 224     vlc_event_manager_t * p_em = input_get_event_manager( p_input );
 225
 226     vlc_event_detach( p_em, vlc_InputStateChanged,
 227                       input_state_changed, p_playlist );
 228     vlc_event_detach( p_em, vlc_InputSelectedStreamChanged,
 229                       input_selected_stream_changed, p_playlist );
 230     p_playlist->p_input = NULL;
 231
 232     /* Release the playlist lock, because we may get stuck
 233      * in vlc_object_release() for some time. */
 234     PL_UNLOCK;
 235     vlc_object_release( p_input );
 236     PL_LOCK;
 237 }
 238
 239 void playlist_set_current_input(
 240     playlist_t * p_playlist, input_thread_t * p_input )
 241 {
 242     vlc_assert_locked( &(vlc_internals(p_playlist)->lock) );
 243
 244     playlist_release_current_input( p_playlist );
 245
 246     if( p_input )
 247     {
 248         vlc_object_yield( p_input );
 249         p_playlist->p_input = p_input;
 250         vlc_event_manager_t * p_em = input_get_event_manager( p_input );
 251         vlc_event_attach( p_em, vlc_InputStateChanged,
 252                           input_state_changed, p_playlist );
 253         vlc_event_attach( p_em, vlc_InputSelectedStreamChanged,
 254                           input_selected_stream_changed, p_playlist );
 255     }
 256 }
 257
 258 /** Get current playing input.
 259  */
 260 input_thread_t * playlist_CurrentInput( playlist_t * p_playlist )
 261 {
 262     input_thread_t * p_input;
 263     PL_LOCK;
 264     p_input = p_playlist->p_input;
 265     if( p_input ) vlc_object_yield( p_input );
 266     PL_UNLOCK;
 267     return p_input;
 268 }
 269
 270
 271 /**
 272  * @}
 273  */
 274
 275 /**
 276  * Main loop
 277  *
 278  * Main loop for the playlist
 279  * \param p_playlist the playlist object
 280  * \return nothing
 281  */
 282 void playlist_MainLoop( playlist_t *p_playlist )
 283 {
 284     playlist_item_t *p_item = NULL;
 285     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 286     PL_LOCK;
 287
 288     if( p_playlist->b_reset_currently_playing &&
 289         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 290     {
 291         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 292                              p_playlist->status.p_item );
 293         p_playlist->last_rebuild_date = mdate();
 294     }
 295
 296 check_input:
 297     /* If there is an input, check that it doesn't need to die. */
 298     if( p_playlist->p_input )
 299     {
 300         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 301         {
 302             PL_DEBUG( "incoming request - stopping current input" );
 303             input_StopThread( p_playlist->p_input );
 304         }
 305
 306         /* This input is dead. Remove it ! */
 307         if( p_playlist->p_input->b_dead )
 308         {
 309             int i_activity;
 310             input_thread_t *p_input;
 311             sout_instance_t **pp_sout =
 312                 &libvlc_priv(p_playlist->p_libvlc)->p_sout;
 313
 314             PL_DEBUG( "dead input" );
 315
 316             p_input = p_playlist->p_input;
 317
 318             assert( *pp_sout == NULL );
 319             if( var_CreateGetBool( p_input, "sout-keep" ) )
 320                 *pp_sout = input_DetachSout( p_input );
 321
 322             /* Destroy input */
 323             playlist_release_current_input( p_playlist );
 324
 325             p_playlist->gc_date = mdate();
 326             p_playlist->b_cant_sleep = true;
 327
 328             if( p_playlist->status.p_item->i_flags
 329                 & PLAYLIST_REMOVE_FLAG )
 330             {
 331                  PL_DEBUG( "%s was marked for deletion, deleting",
 332                                  PLI_NAME( p_playlist->status.p_item  ) );
 333                  playlist_ItemDelete( p_playlist->status.p_item );
 334                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 335                      p_playlist->request.p_item = NULL;
 336                  p_playlist->status.p_item = NULL;
 337             }
 338
 339             i_activity= var_GetInteger( p_playlist, "activity" );
 340             var_SetInteger( p_playlist, "activity", i_activity -
 341                             DEFAULT_INPUT_ACTIVITY );
 342
 343             goto check_input;
 344         }
 345         /* This input is dying, let it do */
 346         else if( p_playlist->p_input->b_die )
 347         {
 348             PL_DEBUG( "dying input" );
 349             PL_UNLOCK;
 350             msleep( INTF_IDLE_SLEEP );
 351             PL_LOCK;
 352             goto check_input;
 353         }
 354         /* This input has finished, ask it to die ! */
 355         else if( p_playlist->p_input->b_error
 356                   || p_playlist->p_input->b_eof )
 357         {
 358             PL_DEBUG( "finished input" );
 359             input_StopThread( p_playlist->p_input );
 360             /* No need to wait here, we'll wait in the p_input->b_die case */
 361             goto check_input;
 362         }
 363         else if( p_playlist->p_input->i_state != INIT_S )
 364         {
 365             PL_UNLOCK;
 366             ObjectGarbageCollector( p_playlist, false );
 367             PL_LOCK;
 368         }
 369     }
 370     else
 371     {
 372         /* No input. Several cases
 373          *  - No request, running status -> start new item
 374          *  - No request, stopped status -> collect garbage
 375          *  - Request, running requested -> start new item
 376          *  - Request, stopped requested -> collect garbage
 377         */
 378         int i_status = p_playlist->request.b_request ?
 379             p_playlist->request.i_status : p_playlist->status.i_status;
 380         if( i_status != PLAYLIST_STOPPED )
 381         {
 382             msg_Dbg( p_playlist, "starting new item" );
 383             p_item = playlist_NextItem( p_playlist );
 384
 385             if( p_item == NULL )
 386             {
 387                 msg_Dbg( p_playlist, "nothing to play" );
 388                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 389                 PL_UNLOCK;
 390
 391                 if( b_playexit == true )
 392                 {
 393                     msg_Info( p_playlist, "end of playlist, exiting" );
 394                     vlc_object_kill( p_playlist->p_libvlc );
 395                 }
 396                 ObjectGarbageCollector( p_playlist, true );
 397                 return;
 398              }
 399              playlist_PlayItem( p_playlist, p_item );
 400          }
 401          else
 402          {
 403             const bool b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 404
 405             p_playlist->status.i_status = PLAYLIST_STOPPED;
 406             if( p_playlist->status.p_item &&
 407                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 408             {
 409                 PL_DEBUG( "deleting item marked for deletion" );
 410                 playlist_ItemDelete( p_playlist->status.p_item );
 411                 p_playlist->status.p_item = NULL;
 412             }
 413
 414             /* Collect garbage */
 415             PL_UNLOCK;
 416             ObjectGarbageCollector( p_playlist, b_gc_forced );
 417             PL_LOCK;
 418         }
 419     }
 420     PL_UNLOCK;
 421 }
 422
 423 /**
 424  * Last loop
 425  *
 426  * The playlist is dying so do the last loop
 427  * \param p_playlist the playlist object
 428  * \return nothing
 429 */
 430 void playlist_LastLoop( playlist_t *p_playlist )
 431 {
 432     /* If there is an input, kill it */
 433     while( 1 )
 434     {
 435         PL_LOCK;
 436         if( p_playlist->p_input == NULL )
 437         {
 438             PL_UNLOCK;
 439             break;
 440         }
 441
 442         if( p_playlist->p_input->b_dead )
 443         {
 444             /* remove input */
 445             playlist_release_current_input( p_playlist );
 446
 447             /* sout-keep: no need to anything here.
 448              * The last input will destroy its sout, if any, by itself */
 449
 450             PL_UNLOCK;
 451             continue;
 452         }
 453         else if( p_playlist->p_input->b_die )
 454         {
 455             /* This input is dying, leave it alone */
 456             ;
 457         }
 458         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 459         {
 460             input_StopThread( p_playlist->p_input );
 461             PL_UNLOCK;
 462             continue;
 463         }
 464         else
 465         {
 466             p_playlist->p_input->b_eof = 1;
 467         }
 468         PL_UNLOCK;
 469
 470         msleep( INTF_IDLE_SLEEP );
 471     }
 472
 473 #ifdef ENABLE_SOUT
 474     /* close the remaining sout-keep (if there was no input atm) */
 475     sout_instance_t *p_sout = libvlc_priv (p_playlist->p_libvlc)->p_sout;
 476     if (p_sout)
 477         sout_DeleteInstance( p_sout );
 478 #endif
 479
 480     if( p_playlist->status.p_node &&
 481         p_playlist->status.p_node->i_flags & PLAYLIST_REMOVE_FLAG )
 482     {
 483          PL_DEBUG( "%s was marked for deletion, deleting",
 484                          PLI_NAME( p_playlist->status.p_node  ) );
 485          playlist_ItemDelete( p_playlist->status.p_node );
 486          p_playlist->status.p_node = NULL;
 487     }
 488
 489     /* Core should have terminated all SDs before the playlist */
 490     /* TODO: It fails to do so when not playing anything -- Courmisch */
 491     playlist_ServicesDiscoveryKillAll( p_playlist );
 492     playlist_MLDump( p_playlist );
 493
 494     PL_LOCK;
 495     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 496         free( p_del->pp_children );
 497         vlc_gc_decref( p_del->p_input );
 498         free( p_del );
 499     FOREACH_END();
 500     ARRAY_RESET( p_playlist->all_items );
 501
 502     ARRAY_RESET( p_playlist->items );
 503     ARRAY_RESET( p_playlist->current );
 504
 505     PL_UNLOCK;
 506 }
 507
 508 /**
 509  * Preparse loop
 510  *
 511  * Main loop for preparser queue
 512  * \param p_obj items to preparse
 513  * \return nothing
 514  */
 515 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 516 {
 517     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 518     input_item_t *p_current;
 519     int i_activity;
 520
 521     vlc_object_lock( p_obj );
 522
 523     while( vlc_object_alive( p_obj ) )
 524     {
 525         if( p_obj->i_waiting == 0 )
 526         {
 527             vlc_object_wait( p_obj );
 528             continue;
 529         }
 530
 531         p_current = p_obj->pp_waiting[0];
 532         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 533         vlc_object_unlock( p_obj );
 534
 535         PL_LOCK;
 536         if( p_current )
 537         {
 538             if( p_current->i_type == ITEM_TYPE_FILE )
 539             {
 540                 stats_TimerStart( p_playlist, "Preparse run",
 541                                   STATS_TIMER_PREPARSE );
 542                 /* Do not preparse if it is already done (like by playing it) */
 543                 if( !input_item_IsPreparsed( p_current ) )
 544                 {
 545                     PL_UNLOCK;
 546                     input_Preparse( p_playlist, p_current );
 547                     PL_LOCK;
 548                 }
 549                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 550                 PL_UNLOCK;
 551                 input_item_SetPreparsed( p_current, true );
 552                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 553                 PL_LOCK;
 554             }
 555             /* If we haven't retrieved enough meta, add to secondary queue
 556              * which will run the "meta fetchers".
 557              * This only checks for meta, not for art
 558              * \todo don't do this for things we won't get meta for, like vids
 559              */
 560             char *psz_arturl = input_item_GetArtURL( p_current );
 561             char *psz_name = input_item_GetName( p_current );
 562             if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 563                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 564             {
 565                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 566                 vlc_object_lock( p_playlist->p_fetcher );
 567                 INSERT_ELEM( p_playlist->p_fetcher->pp_waiting,
 568                              p_playlist->p_fetcher->i_waiting,
 569                              p_playlist->p_fetcher->i_waiting, p_current);
 570                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 571                 vlc_object_unlock( p_playlist->p_fetcher );
 572             }
 573             else
 574             {
 575                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 576                           psz_name, psz_arturl );
 577                 vlc_gc_decref( p_current );
 578             }
 579             free( psz_name );
 580             free( psz_arturl );
 581             PL_UNLOCK;
 582         }
 583         else
 584             PL_UNLOCK;
 585
 586         vlc_object_lock( p_obj );
 587         i_activity = var_GetInteger( p_playlist, "activity" );
 588         if( i_activity < 0 ) i_activity = 0;
 589         vlc_object_unlock( p_obj );
 590         /* Sleep at least 1ms */
 591         msleep( (i_activity+1) * 1000 );
 592         vlc_object_lock( p_obj );
 593     }
 594     vlc_object_unlock( p_obj );
 595 }
 596
 597 /**
 598  * Fetcher loop
 599  *
 600  * Main loop for secondary preparser queue
 601  * \param p_obj items to preparse
 602  * \return nothing
 603  */
 604 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 605 {
 606     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 607     input_item_t *p_item;
 608     int i_activity;
 609
 610     vlc_object_lock( p_obj );
 611
 612     while( vlc_object_alive( p_obj ) )
 613     {
 614         if( p_obj->i_waiting == 0 )
 615         {
 616             vlc_object_wait( p_obj );
 617             continue;
 618         }
 619
 620         p_item = p_obj->pp_waiting[0];
 621         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 622         vlc_object_unlock( p_obj );
 623         if( p_item )
 624         {
 625             int i_ret;
 626
 627             /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 628              * (This can happen if we fetch art on play)
 629              * FIXME this doesn't work if we need to fetch meta before art ... */
 630             for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 631             {
 632                 bool b_break;
 633                 PL_LOCK;
 634                 b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 635                             p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 636                 PL_UNLOCK;
 637                 if( b_break )
 638                     break;
 639                 msleep( 50000 );
 640             }
 641
 642             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                     input_item_SetArtNotFound( p_item, true );
 648                 else {
 649                     input_item_SetArtFetched( p_item, true );
 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                 input_item_SetArtFetched( p_item, true );
 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                 input_item_SetArtNotFound( p_item, true );
 664             }
 665             vlc_gc_decref( p_item );
 666         }
 667         vlc_object_lock( p_obj );
 668         i_activity = var_GetInteger( p_playlist, "activity" );
 669         if( i_activity < 0 ) i_activity = 0;
 670         vlc_object_unlock( p_obj );
 671         /* Sleep at least 1ms */
 672         msleep( (i_activity+1) * 1000 );
 673         vlc_object_lock( p_obj );
 674     }
 675     vlc_object_unlock( p_obj );
 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 = 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, "activity", VLC_VAR_INTEGER );
 701     var_SetInteger( p_playlist, "activity", 0 );
 702
 703     /* Variables to control playback */
 704     var_CreateGetBool( p_playlist, "play-and-stop" );
 705     var_CreateGetBool( p_playlist, "play-and-exit" );
 706     var_CreateGetBool( p_playlist, "random" );
 707     var_CreateGetBool( p_playlist, "repeat" );
 708     var_CreateGetBool( p_playlist, "loop" );
 709
 710     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 711 }