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 #ifndef NDEBUG
 177     libvlc_priv (p_this->p_libvlc)->p_playlist = NULL; /* pl_Yield() will fail */
 178 #endif
 179 }
 180
 181 /* Destroy remaining objects */
 182 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
 183 {
 184     vlc_object_t *p_obj;
 185
 186     if( !b_force )
 187     {
 188         if( mdate() - p_playlist->gc_date < 1000000 )
 189         {
 190             p_playlist->b_cant_sleep = true;
 191             return;
 192         }
 193         else if( p_playlist->gc_date == 0 )
 194             return;
 195     }
 196
 197     vlc_mutex_lock( &p_playlist->gc_lock );
 198     while( ( p_obj = vlc_object_find( p_playlist->p_libvlc, VLC_OBJECT_VOUT,
 199                                                   FIND_CHILD ) ) )
 200     {
 201         vlc_object_release( p_obj );
 202         if( p_obj->p_parent == VLC_OBJECT(p_playlist->p_libvlc) )
 203         {
 204             msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 205             vlc_object_release( p_obj ); /* Hmm, is this (thread-)safe?? */
 206         }
 207     }
 208     p_playlist->b_cant_sleep = false;
 209     vlc_mutex_unlock( &p_playlist->gc_lock );
 210 }
 211
 212 /* Input Callback */
 213 static void input_state_changed( const vlc_event_t * event, void * data )
 214 {
 215     (void)event;
 216     playlist_t * p_playlist = data;
 217     playlist_Signal( p_playlist );
 218 }
 219
 220 /* Input Callback */
 221 static void input_selected_stream_changed( const vlc_event_t * event, void * data )
 222 {
 223     (void)event;
 224     playlist_t * p_playlist = data;
 225     PL_LOCK;
 226     p_playlist->gc_date = mdate();
 227     vlc_object_signal_unlocked( p_playlist );
 228     PL_UNLOCK;
 229 }
 230
 231 /* Internals */
 232 void playlist_release_current_input( playlist_t * p_playlist )
 233 {
 234     vlc_assert_locked( &(vlc_internals(p_playlist)->lock) );
 235
 236     if( !p_playlist->p_input ) return;
 237
 238     input_thread_t * p_input = p_playlist->p_input;
 239     vlc_event_manager_t * p_em = input_get_event_manager( p_input );
 240
 241     vlc_event_detach( p_em, vlc_InputStateChanged,
 242                       input_state_changed, p_playlist );
 243     vlc_event_detach( p_em, vlc_InputSelectedStreamChanged,
 244                       input_selected_stream_changed, p_playlist );
 245     p_playlist->p_input = NULL;
 246
 247     /* Release the playlist lock, because we may get stuck
 248      * in vlc_object_release() for some time. */
 249     PL_UNLOCK;
 250     vlc_object_release( p_input );
 251     PL_LOCK;
 252 }
 253
 254 void playlist_set_current_input(
 255     playlist_t * p_playlist, input_thread_t * p_input )
 256 {
 257     vlc_assert_locked( &(vlc_internals(p_playlist)->lock) );
 258
 259     playlist_release_current_input( p_playlist );
 260
 261     if( p_input )
 262     {
 263         vlc_object_yield( p_input );
 264         p_playlist->p_input = p_input;
 265         vlc_event_manager_t * p_em = input_get_event_manager( p_input );
 266         vlc_event_attach( p_em, vlc_InputStateChanged,
 267                           input_state_changed, p_playlist );
 268         vlc_event_attach( p_em, vlc_InputSelectedStreamChanged,
 269                           input_selected_stream_changed, p_playlist );
 270     }
 271 }
 272
 273
 274 /**
 275  * @}
 276  */
 277
 278 /**
 279  * Main loop
 280  *
 281  * Main loop for the playlist
 282  * \param p_playlist the playlist object
 283  * \return nothing
 284  */
 285 void playlist_MainLoop( playlist_t *p_playlist )
 286 {
 287     playlist_item_t *p_item = NULL;
 288     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 289     PL_LOCK;
 290
 291     if( p_playlist->b_reset_currently_playing &&
 292         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 293     {
 294         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 295                              p_playlist->status.p_item );
 296         p_playlist->last_rebuild_date = mdate();
 297     }
 298
 299 check_input:
 300     /* If there is an input, check that it doesn't need to die. */
 301     if( p_playlist->p_input )
 302     {
 303         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 304         {
 305             PL_DEBUG( "incoming request - stopping current input" );
 306             input_StopThread( p_playlist->p_input );
 307         }
 308
 309         /* This input is dead. Remove it ! */
 310         if( p_playlist->p_input->b_dead )
 311         {
 312             int i_activity;
 313             input_thread_t *p_input;
 314             sout_instance_t **pp_sout =
 315                 &libvlc_priv(p_playlist->p_libvlc)->p_sout;
 316
 317             PL_DEBUG( "dead input" );
 318
 319             p_input = p_playlist->p_input;
 320
 321             assert( *pp_sout == NULL );
 322             if( var_CreateGetBool( p_input, "sout-keep" ) )
 323                 *pp_sout = input_DetachSout( p_input );
 324
 325             /* Destroy input */
 326             playlist_release_current_input( p_playlist );
 327
 328             p_playlist->gc_date = mdate();
 329             p_playlist->b_cant_sleep = true;
 330
 331             if( p_playlist->status.p_item->i_flags
 332                 & PLAYLIST_REMOVE_FLAG )
 333             {
 334                  PL_DEBUG( "%s was marked for deletion, deleting",
 335                                  PLI_NAME( p_playlist->status.p_item  ) );
 336                  playlist_ItemDelete( p_playlist->status.p_item );
 337                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 338                      p_playlist->request.p_item = NULL;
 339                  p_playlist->status.p_item = NULL;
 340             }
 341
 342             i_activity= var_GetInteger( p_playlist, "activity" );
 343             var_SetInteger( p_playlist, "activity", i_activity -
 344                             DEFAULT_INPUT_ACTIVITY );
 345
 346             goto check_input;
 347         }
 348         /* This input is dying, let it do */
 349         else if( p_playlist->p_input->b_die )
 350         {
 351             PL_DEBUG( "dying input" );
 352             PL_UNLOCK;
 353             msleep( INTF_IDLE_SLEEP );
 354             PL_LOCK;
 355             goto check_input;
 356         }
 357         /* This input has finished, ask it to die ! */
 358         else if( p_playlist->p_input->b_error
 359                   || p_playlist->p_input->b_eof )
 360         {
 361             PL_DEBUG( "finished input" );
 362             input_StopThread( p_playlist->p_input );
 363             /* No need to wait here, we'll wait in the p_input->b_die case */
 364             goto check_input;
 365         }
 366         else if( p_playlist->p_input->i_state != INIT_S )
 367         {
 368             PL_UNLOCK;
 369             ObjectGarbageCollector( p_playlist, false );
 370             PL_LOCK;
 371         }
 372     }
 373     else
 374     {
 375         /* No input. Several cases
 376          *  - No request, running status -> start new item
 377          *  - No request, stopped status -> collect garbage
 378          *  - Request, running requested -> start new item
 379          *  - Request, stopped requested -> collect garbage
 380         */
 381         int i_status = p_playlist->request.b_request ?
 382             p_playlist->request.i_status : p_playlist->status.i_status;
 383         if( i_status != PLAYLIST_STOPPED )
 384         {
 385             msg_Dbg( p_playlist, "starting new item" );
 386             p_item = playlist_NextItem( p_playlist );
 387
 388             if( p_item == NULL )
 389             {
 390                 msg_Dbg( p_playlist, "nothing to play" );
 391                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 392                 PL_UNLOCK;
 393
 394                 if( b_playexit == true )
 395                 {
 396                     msg_Info( p_playlist, "end of playlist, exiting" );
 397                     vlc_object_kill( p_playlist->p_libvlc );
 398                 }
 399                 ObjectGarbageCollector( p_playlist, true );
 400                 return;
 401              }
 402              playlist_PlayItem( p_playlist, p_item );
 403          }
 404          else
 405          {
 406             const bool b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 407
 408             p_playlist->status.i_status = PLAYLIST_STOPPED;
 409             if( p_playlist->status.p_item &&
 410                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 411             {
 412                 PL_DEBUG( "deleting item marked for deletion" );
 413                 playlist_ItemDelete( p_playlist->status.p_item );
 414                 p_playlist->status.p_item = NULL;
 415             }
 416
 417             /* Collect garbage */
 418             PL_UNLOCK;
 419             ObjectGarbageCollector( p_playlist, b_gc_forced );
 420             PL_LOCK;
 421         }
 422     }
 423     PL_UNLOCK;
 424 }
 425
 426 /**
 427  * Last loop
 428  *
 429  * The playlist is dying so do the last loop
 430  * \param p_playlist the playlist object
 431  * \return nothing
 432 */
 433 void playlist_LastLoop( playlist_t *p_playlist )
 434 {
 435     /* If there is an input, kill it */
 436     while( 1 )
 437     {
 438         PL_LOCK;
 439         if( p_playlist->p_input == NULL )
 440         {
 441             PL_UNLOCK;
 442             break;
 443         }
 444
 445         if( p_playlist->p_input->b_dead )
 446         {
 447             /* remove input */
 448             playlist_release_current_input( p_playlist );
 449
 450             /* sout-keep: no need to anything here.
 451              * The last input will destroy its sout, if any, by itself */
 452
 453             PL_UNLOCK;
 454             continue;
 455         }
 456         else if( p_playlist->p_input->b_die )
 457         {
 458             /* This input is dying, leave it alone */
 459             ;
 460         }
 461         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 462         {
 463             input_StopThread( p_playlist->p_input );
 464             PL_UNLOCK;
 465             continue;
 466         }
 467         else
 468         {
 469             p_playlist->p_input->b_eof = 1;
 470         }
 471         PL_UNLOCK;
 472
 473         msleep( INTF_IDLE_SLEEP );
 474     }
 475
 476 #ifdef ENABLE_SOUT
 477     /* close the remaining sout-keep (if there was no input atm) */
 478     sout_instance_t *p_sout = libvlc_priv (p_playlist->p_libvlc)->p_sout;
 479     if (p_sout)
 480         sout_DeleteInstance( p_sout );
 481 #endif
 482
 483     /* Core should have terminated all SDs before the playlist */
 484     /* TODO: It fails to do so when not playing anything -- Courmisch */
 485     playlist_ServicesDiscoveryKillAll( p_playlist );
 486     playlist_MLDump( p_playlist );
 487
 488     PL_LOCK;
 489     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 490         free( p_del->pp_children );
 491         vlc_gc_decref( p_del->p_input );
 492         free( p_del );
 493     FOREACH_END();
 494     ARRAY_RESET( p_playlist->all_items );
 495
 496     ARRAY_RESET( p_playlist->items );
 497     ARRAY_RESET( p_playlist->current );
 498
 499     PL_UNLOCK;
 500 }
 501
 502 /**
 503  * Preparse loop
 504  *
 505  * Main loop for preparser queue
 506  * \param p_obj items to preparse
 507  * \return nothing
 508  */
 509 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 510 {
 511     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 512     input_item_t *p_current;
 513     int i_activity;
 514
 515     vlc_object_lock( p_obj );
 516
 517     while( vlc_object_alive( p_obj ) )
 518     {
 519         if( p_obj->i_waiting == 0 )
 520         {
 521             vlc_object_wait( p_obj );
 522             continue;
 523         }
 524
 525         p_current = p_obj->pp_waiting[0];
 526         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 527         vlc_object_unlock( p_obj );
 528
 529         PL_LOCK;
 530         if( p_current )
 531         {
 532             if( p_current->i_type == ITEM_TYPE_FILE )
 533             {
 534                 stats_TimerStart( p_playlist, "Preparse run",
 535                                   STATS_TIMER_PREPARSE );
 536                 /* Do not preparse if it is already done (like by playing it) */
 537                 if( !input_item_IsPreparsed( p_current ) )
 538                 {
 539                     PL_UNLOCK;
 540                     input_Preparse( p_playlist, p_current );
 541                     PL_LOCK;
 542                 }
 543                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 544                 PL_UNLOCK;
 545                 input_item_SetPreparsed( p_current, true );
 546                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 547                 PL_LOCK;
 548             }
 549             /* If we haven't retrieved enough meta, add to secondary queue
 550              * which will run the "meta fetchers".
 551              * This only checks for meta, not for art
 552              * \todo don't do this for things we won't get meta for, like vids
 553              */
 554             char *psz_arturl = input_item_GetArtURL( p_current );
 555             char *psz_name = input_item_GetName( p_current );
 556             if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 557                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 558             {
 559                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 560                 vlc_object_lock( p_playlist->p_fetcher );
 561                 INSERT_ELEM( p_playlist->p_fetcher->pp_waiting,
 562                              p_playlist->p_fetcher->i_waiting,
 563                              p_playlist->p_fetcher->i_waiting, p_current);
 564                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 565                 vlc_object_unlock( p_playlist->p_fetcher );
 566             }
 567             else
 568             {
 569                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 570                           psz_name, psz_arturl );
 571                 vlc_gc_decref( p_current );
 572             }
 573             free( psz_name );
 574             free( psz_arturl );
 575             PL_UNLOCK;
 576         }
 577         else
 578             PL_UNLOCK;
 579
 580         vlc_object_lock( p_obj );
 581         i_activity = var_GetInteger( p_playlist, "activity" );
 582         if( i_activity < 0 ) i_activity = 0;
 583         vlc_object_unlock( p_obj );
 584         /* Sleep at least 1ms */
 585         msleep( (i_activity+1) * 1000 );
 586         vlc_object_lock( p_obj );
 587     }
 588     vlc_object_unlock( p_obj );
 589 }
 590
 591 /**
 592  * Fetcher loop
 593  *
 594  * Main loop for secondary preparser queue
 595  * \param p_obj items to preparse
 596  * \return nothing
 597  */
 598 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 599 {
 600     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 601     input_item_t *p_item;
 602     int i_activity;
 603
 604     vlc_object_lock( p_obj );
 605
 606     while( vlc_object_alive( p_obj ) )
 607     {
 608         if( p_obj->i_waiting == 0 )
 609         {
 610             vlc_object_wait( p_obj );
 611             continue;
 612         }
 613
 614         p_item = p_obj->pp_waiting[0];
 615         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 616         vlc_object_unlock( p_obj );
 617         if( p_item )
 618         {
 619             int i_ret;
 620
 621             /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 622              * (This can happen if we fetch art on play)
 623              * FIXME this doesn't work if we need to fetch meta before art ... */
 624             for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 625             {
 626                 bool b_break;
 627                 PL_LOCK;
 628                 b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 629                             p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 630                 PL_UNLOCK;
 631                 if( b_break )
 632                     break;
 633                 msleep( 50000 );
 634             }
 635
 636             i_ret = input_ArtFind( p_playlist, p_item );
 637             if( i_ret == 1 )
 638             {
 639                 PL_DEBUG( "downloading art for %s", p_item->psz_name );
 640                 if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 641                     input_item_SetArtNotFound( p_item, true );
 642                 else {
 643                     input_item_SetArtFetched( p_item, true );
 644                     var_SetInteger( p_playlist, "item-change",
 645                                     p_item->i_id );
 646                 }
 647             }
 648             else if( i_ret == 0 ) /* Was in cache */
 649             {
 650                 PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 651                 input_item_SetArtFetched( p_item, true );
 652                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 653             }
 654             else
 655             {
 656                 PL_DEBUG( "art not found for %s", p_item->psz_name );
 657                 input_item_SetArtNotFound( p_item, true );
 658             }
 659             vlc_gc_decref( p_item );
 660         }
 661         vlc_object_lock( p_obj );
 662         i_activity = var_GetInteger( p_playlist, "activity" );
 663         if( i_activity < 0 ) i_activity = 0;
 664         vlc_object_unlock( p_obj );
 665         /* Sleep at least 1ms */
 666         msleep( (i_activity+1) * 1000 );
 667         vlc_object_lock( p_obj );
 668     }
 669     vlc_object_unlock( p_obj );
 670 }
 671
 672 static void VariablesInit( playlist_t *p_playlist )
 673 {
 674     vlc_value_t val;
 675     /* These variables control updates */
 676     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 677     val.b_bool = true;
 678     var_Set( p_playlist, "intf-change", val );
 679
 680     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 681     val.i_int = -1;
 682     var_Set( p_playlist, "item-change", val );
 683
 684     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 685     val.i_int = -1;
 686     var_Set( p_playlist, "item-deleted", val );
 687
 688     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 689
 690     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 691     val.i_int = -1;
 692     var_Set( p_playlist, "playlist-current", val );
 693
 694     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 695     var_SetInteger( p_playlist, "activity", 0 );
 696
 697     /* Variables to control playback */
 698     var_CreateGetBool( p_playlist, "play-and-stop" );
 699     var_CreateGetBool( p_playlist, "play-and-exit" );
 700     var_CreateGetBool( p_playlist, "random" );
 701     var_CreateGetBool( p_playlist, "repeat" );
 702     var_CreateGetBool( p_playlist, "loop" );
 703
 704     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 705 }