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) 1999-2007 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 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc_vout.h>
  31 #include <vlc_sout.h>
  32 #include <vlc_playlist.h>
  33 #include <vlc_interface.h>
  34 #include "playlist_internal.h"
  35 #include "stream_output/stream_output.h" /* sout_DeleteInstance */
  36
  37 /*****************************************************************************
  38  * Local prototypes
  39  *****************************************************************************/
  40 static void VariablesInit( playlist_t *p_playlist );
  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 = VLC_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     playlist_t *p_playlist;
  63     vlc_bool_t b_save;
  64     int i_tree;
  65
  66     /* Allocate structure */
  67     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  68     if( !p_playlist )
  69     {
  70         msg_Err( p_parent, "out of memory" );
  71         return NULL;
  72     }
  73
  74     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
  75
  76     p_parent->p_libvlc->p_playlist = p_playlist;
  77
  78     VariablesInit( p_playlist );
  79
  80     /* Initialise data structures */
  81     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  82     p_playlist->i_last_playlist_id = 0;
  83     p_playlist->p_input = NULL;
  84
  85     p_playlist->gc_date = 0;
  86     p_playlist->b_cant_sleep = VLC_FALSE;
  87
  88     ARRAY_INIT( p_playlist->items );
  89     ARRAY_INIT( p_playlist->all_items );
  90     ARRAY_INIT( p_playlist->current );
  91
  92     p_playlist->i_current_index = 0;
  93     p_playlist->b_reset_currently_playing = VLC_TRUE;
  94     p_playlist->last_rebuild_date = 0;
  95
  96     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  97     p_playlist->b_always_tree = (i_tree == 1);
  98     p_playlist->b_never_tree = (i_tree == 2);
  99
 100     p_playlist->b_doing_ml = VLC_FALSE;
 101
 102     p_playlist->b_auto_preparse =
 103                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
 104
 105     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 106                                     0, NULL );
 107     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 108                                     0, p_playlist->p_root_category->p_input );
 109
 110     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 111         return NULL;
 112
 113     /* Create playlist and media library */
 114     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 115                             &p_playlist->p_local_category,
 116                             &p_playlist->p_local_onelevel, VLC_FALSE );
 117
 118     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 119     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 120
 121     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 122         !p_playlist->p_local_category->p_input ||
 123         !p_playlist->p_local_onelevel->p_input )
 124         return NULL;
 125
 126     if( config_GetInt( p_playlist, "media-library") )
 127     {
 128         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 129                             &p_playlist->p_ml_category,
 130                             &p_playlist->p_ml_onelevel, VLC_FALSE );
 131
 132         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 133             return NULL;
 134
 135         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 136         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 137     }
 138     else
 139     {
 140         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 141     }
 142
 143     /* Initial status */
 144     p_playlist->status.p_item = NULL;
 145     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 146     p_playlist->request.b_request = VLC_FALSE;
 147     p_playlist->status.i_status = PLAYLIST_STOPPED;
 148
 149     p_playlist->i_sort = SORT_ID;
 150     p_playlist->i_order = ORDER_NORMAL;
 151
 152
 153     b_save = p_playlist->b_auto_preparse;
 154     p_playlist->b_auto_preparse = VLC_FALSE;
 155     playlist_MLLoad( p_playlist );
 156     p_playlist->b_auto_preparse = VLC_TRUE;
 157
 158     vlc_object_set_destructor( p_playlist, playlist_Destructor );
 159
 160     return p_playlist;
 161 }
 162
 163 /**
 164  * Destroy playlist
 165  *
 166  * Destroy a playlist structure.
 167  * \param p_playlist the playlist object
 168  * \return nothing
 169  */
 170 void playlist_Destroy( playlist_t *p_playlist )
 171 {
 172     /* XXX: should go in the playlist destructor */
 173     var_Destroy( p_playlist, "intf-change" );
 174     var_Destroy( p_playlist, "item-change" );
 175     var_Destroy( p_playlist, "playlist-current" );
 176     var_Destroy( p_playlist, "intf-popupmenu" );
 177     var_Destroy( p_playlist, "intf-show" );
 178     var_Destroy( p_playlist, "play-and-stop" );
 179     var_Destroy( p_playlist, "play-and-exit" );
 180     var_Destroy( p_playlist, "random" );
 181     var_Destroy( p_playlist, "repeat" );
 182     var_Destroy( p_playlist, "loop" );
 183     var_Destroy( p_playlist, "activity" );
 184
 185     vlc_object_release( p_playlist );
 186 }
 187
 188 static void playlist_Destructor( vlc_object_t * p_this )
 189 {
 190     playlist_t * p_playlist = (playlist_t *)p_this;
 191
 192     // Kill preparser
 193     if( p_playlist->p_preparse )
 194     {
 195         vlc_object_release( p_playlist->p_preparse );
 196     }
 197
 198     // Kill meta fetcher
 199     if( p_playlist->p_fetcher )
 200     {
 201         vlc_object_release( p_playlist->p_fetcher );
 202     }
 203
 204     // Stats
 205     vlc_mutex_destroy( &p_playlist->p_stats->lock );
 206     if( p_playlist->p_stats )
 207         free( p_playlist->p_stats );
 208 }
 209
 210 /* Destroy remaining objects */
 211 static void ObjectGarbageCollector( playlist_t *p_playlist, vlc_bool_t b_force )
 212 {
 213     vlc_object_t *p_obj;
 214
 215     if( !b_force )
 216     {
 217         if( mdate() - p_playlist->gc_date < 1000000 )
 218         {
 219             p_playlist->b_cant_sleep = VLC_TRUE;
 220             return;
 221         }
 222         else if( p_playlist->gc_date == 0 )
 223             return;
 224     }
 225
 226     vlc_mutex_lock( &p_playlist->gc_lock );
 227     while( ( p_obj = vlc_object_find( p_playlist->p_libvlc, VLC_OBJECT_VOUT,
 228                                                   FIND_CHILD ) ) )
 229     {
 230         if( p_obj->p_parent != VLC_OBJECT(p_playlist->p_libvlc) )
 231         {
 232             vlc_object_release( p_obj );
 233             break;
 234         }
 235         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 236         vlc_object_detach( p_obj );
 237         vlc_object_release( p_obj );
 238         vout_Destroy( (vout_thread_t *)p_obj );
 239     }
 240     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 241                                                   FIND_CHILD ) ) )
 242     {
 243         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 244         {
 245             vlc_object_release( p_obj );
 246             break;
 247         }
 248         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 249         vlc_object_detach( p_obj );
 250         vlc_object_release( p_obj );
 251         sout_DeleteInstance( (sout_instance_t*)p_obj );
 252     }
 253     p_playlist->b_cant_sleep = VLC_FALSE;
 254     vlc_mutex_unlock( &p_playlist->gc_lock );
 255 }
 256
 257 /**
 258  * Main loop
 259  *
 260  * Main loop for the playlist
 261  * \param p_playlist the playlist object
 262  * \return nothing
 263  */
 264 void playlist_MainLoop( playlist_t *p_playlist )
 265 {
 266     playlist_item_t *p_item = NULL;
 267     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 268     PL_LOCK;
 269
 270     if( p_playlist->b_reset_currently_playing &&
 271         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 272     {
 273         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 274                              p_playlist->status.p_item );
 275         p_playlist->last_rebuild_date = mdate();
 276     }
 277
 278 check_input:
 279     /* If there is an input, check that it doesn't need to die. */
 280     if( p_playlist->p_input )
 281     {
 282         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 283         {
 284             PL_DEBUG( "incoming request - stopping current input" );
 285             input_StopThread( p_playlist->p_input );
 286         }
 287
 288         /* This input is dead. Remove it ! */
 289         if( p_playlist->p_input->b_dead )
 290         {
 291             int i_activity;
 292             input_thread_t *p_input;
 293             PL_DEBUG( "dead input" );
 294
 295             p_input = p_playlist->p_input;
 296             p_playlist->p_input = NULL;
 297
 298             /* Release the playlist lock, because we may get stuck
 299              * in vlc_object_release() for some time. */
 300             PL_UNLOCK;
 301
 302             /* Destroy input */
 303             vlc_object_release( p_input );
 304
 305             PL_LOCK;
 306
 307             p_playlist->gc_date = mdate();
 308             p_playlist->b_cant_sleep = VLC_TRUE;
 309
 310             if( p_playlist->status.p_item->i_flags
 311                 & PLAYLIST_REMOVE_FLAG )
 312             {
 313                  PL_DEBUG( "%s was marked for deletion, deleting",
 314                                  PLI_NAME( p_playlist->status.p_item  ) );
 315                  playlist_ItemDelete( p_playlist->status.p_item );
 316                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 317                      p_playlist->request.p_item = NULL;
 318                  p_playlist->status.p_item = NULL;
 319             }
 320
 321             i_activity= var_GetInteger( p_playlist, "activity" );
 322             var_SetInteger( p_playlist, "activity", i_activity -
 323                             DEFAULT_INPUT_ACTIVITY );
 324             goto check_input;
 325         }
 326         /* This input is dying, let it do */
 327         else if( p_playlist->p_input->b_die )
 328         {
 329             PL_DEBUG( "dying input" );
 330             PL_UNLOCK;
 331             msleep( INTF_IDLE_SLEEP );
 332             PL_LOCK;
 333             goto check_input;
 334         }
 335         /* This input has finished, ask it to die ! */
 336         else if( p_playlist->p_input->b_error
 337                   || p_playlist->p_input->b_eof )
 338         {
 339             PL_DEBUG( "finished input" );
 340             input_StopThread( p_playlist->p_input );
 341             /* No need to wait here, we'll wait in the p_input->b_die case */
 342             goto check_input;
 343         }
 344         else if( p_playlist->p_input->i_state != INIT_S )
 345         {
 346             PL_UNLOCK;
 347             ObjectGarbageCollector( p_playlist, VLC_FALSE );
 348             PL_LOCK;
 349         }
 350     }
 351     else
 352     {
 353         /* No input. Several cases
 354          *  - No request, running status -> start new item
 355          *  - No request, stopped status -> collect garbage
 356          *  - Request, running requested -> start new item
 357          *  - Request, stopped requested -> collect garbage
 358         */
 359         if( p_playlist->request.i_status != PLAYLIST_STOPPED )
 360         {
 361             msg_Dbg( p_playlist, "starting new item" );
 362             p_item = playlist_NextItem( p_playlist );
 363
 364             if( p_item == NULL )
 365             {
 366                 msg_Dbg( p_playlist, "nothing to play" );
 367                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 368                 PL_UNLOCK;
 369
 370                 if( b_playexit == VLC_TRUE )
 371                 {
 372                     msg_Info( p_playlist, "end of playlist, exiting" );
 373                     vlc_object_kill( p_playlist->p_libvlc );
 374                 }
 375                 ObjectGarbageCollector( p_playlist, VLC_TRUE );
 376                 return;
 377              }
 378              playlist_PlayItem( p_playlist, p_item );
 379          }
 380          else
 381          {
 382             const vlc_bool_t b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 383
 384             p_playlist->status.i_status = PLAYLIST_STOPPED;
 385             if( p_playlist->status.p_item &&
 386                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 387             {
 388                 PL_DEBUG( "deleting item marked for deletion" );
 389                 playlist_ItemDelete( p_playlist->status.p_item );
 390                 p_playlist->status.p_item = NULL;
 391             }
 392
 393             /* Collect garbage */
 394             PL_UNLOCK;
 395             ObjectGarbageCollector( p_playlist, b_gc_forced );
 396             PL_LOCK;
 397         }
 398     }
 399     PL_UNLOCK;
 400 }
 401
 402
 403 /**
 404  * Last loop
 405  *
 406  * The playlist is dying so do the last loop
 407  * \param p_playlist the playlist object
 408  * \return nothing
 409 */
 410 void playlist_LastLoop( playlist_t *p_playlist )
 411 {
 412     vlc_object_t *p_obj;
 413
 414     /* If there is an input, kill it */
 415     while( 1 )
 416     {
 417         PL_LOCK;
 418         if( p_playlist->p_input == NULL )
 419         {
 420             PL_UNLOCK;
 421             break;
 422         }
 423
 424         if( p_playlist->p_input->b_dead )
 425         {
 426             input_thread_t *p_input;
 427
 428             /* Unlink current input */
 429             p_input = p_playlist->p_input;
 430             p_playlist->p_input = NULL;
 431             PL_UNLOCK;
 432
 433             /* Destroy input */
 434             vlc_object_release( p_input );
 435             continue;
 436         }
 437         else if( p_playlist->p_input->b_die )
 438         {
 439             /* This input is dying, leave it alone */
 440             ;
 441         }
 442         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 443         {
 444             input_StopThread( p_playlist->p_input );
 445             PL_UNLOCK;
 446             continue;
 447         }
 448         else
 449         {
 450             p_playlist->p_input->b_eof = 1;
 451         }
 452         PL_UNLOCK;
 453
 454         msleep( INTF_IDLE_SLEEP );
 455     }
 456
 457     /* close all remaining sout */
 458     while( ( p_obj = vlc_object_find( p_playlist,
 459                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 460     {
 461         vlc_object_detach( p_obj );
 462         vlc_object_release( p_obj );
 463         sout_DeleteInstance( (sout_instance_t*)p_obj );
 464     }
 465
 466     /* close all remaining vout */
 467     while( ( p_obj = vlc_object_find( p_playlist,
 468                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 469     {
 470         vlc_object_detach( p_obj );
 471         vlc_object_release( p_obj );
 472         vout_Destroy( (vout_thread_t *)p_obj );
 473     }
 474
 475     while( p_playlist->i_sds )
 476     {
 477         playlist_ServicesDiscoveryRemove( p_playlist,
 478                                           p_playlist->pp_sds[0]->p_sd->psz_module );
 479     }
 480
 481     playlist_MLDump( p_playlist );
 482
 483     PL_LOCK;
 484     /* Go through all items, and simply free everything without caring
 485      * about the tree structure. Do not decref, it will be done by doing
 486      * the same thing on the input items array */
 487     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 488         free( p_del->pp_children );
 489         free( p_del );
 490     FOREACH_END();
 491     ARRAY_RESET( p_playlist->all_items );
 492
 493     ARRAY_RESET( p_playlist->items );
 494     ARRAY_RESET( p_playlist->current );
 495
 496     PL_UNLOCK;
 497 }
 498
 499 /**
 500  * Preparse loop
 501  *
 502  * Main loop for preparser queue
 503  * \param p_obj items to preparse
 504  * \return nothing
 505  */
 506 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 507 {
 508     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 509     input_item_t *p_current;
 510     int i_activity;
 511     uint32_t i_m, i_o;
 512
 513     while( !p_playlist->b_die )
 514     {
 515         vlc_object_lock( p_obj );
 516         while( p_obj->i_waiting == 0 )
 517         {
 518             if( vlc_object_wait( p_obj ) || p_playlist->b_die )
 519             {
 520                 vlc_object_unlock( p_obj );
 521                 return;
 522             }
 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, VLC_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( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 557             {
 558                 preparse_item_t p;
 559                 PL_DEBUG( "need to fetch meta for %s", p_current->psz_name );
 560                 p.p_item = p_current;
 561                 p.b_fetch_art = VLC_FALSE;
 562                 vlc_object_lock( p_playlist->p_fetcher );
 563                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 564                              p_playlist->p_fetcher->i_waiting,
 565                              p_playlist->p_fetcher->i_waiting, p);
 566                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 567                 vlc_object_unlock( p_playlist->p_fetcher );
 568             }
 569             /* We already have all needed meta, but we need art right now */
 570             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 571                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 572             {
 573                 preparse_item_t p;
 574                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 575                 p.p_item = p_current;
 576                 p.b_fetch_art = VLC_TRUE;
 577                 vlc_object_lock( p_playlist->p_fetcher );
 578                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 579                              p_playlist->p_fetcher->i_waiting,
 580                              p_playlist->p_fetcher->i_waiting, p);
 581                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 582                 vlc_object_unlock( p_playlist->p_fetcher );
 583             }
 584             else
 585             {
 586                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 587                           psz_name, psz_arturl );
 588                 vlc_gc_decref( p_current );
 589             }
 590             free( psz_name );
 591             free( psz_arturl );
 592             PL_UNLOCK;
 593         }
 594         else
 595             PL_UNLOCK;
 596
 597         vlc_object_lock( p_obj );
 598         i_activity = var_GetInteger( p_playlist, "activity" );
 599         if( i_activity < 0 ) i_activity = 0;
 600         vlc_object_unlock( p_obj );
 601         /* Sleep at least 1ms */
 602         msleep( (i_activity+1) * 1000 );
 603     }
 604 }
 605
 606 /**
 607  * Fetcher loop
 608  *
 609  * Main loop for secondary preparser queue
 610  * \param p_obj items to preparse
 611  * \return nothing
 612  */
 613 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 614 {
 615     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 616     vlc_bool_t b_fetch_art;
 617     input_item_t *p_item;
 618     int i_activity;
 619
 620     while( !p_playlist->b_die )
 621     {
 622         vlc_mutex_lock( &p_obj->object_lock );
 623         while( p_obj->i_waiting == 0 )
 624         {
 625             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 626             if( p_playlist->b_die )
 627             {
 628                 vlc_mutex_unlock( &p_obj->object_lock );
 629                 return;
 630             }
 631         }
 632
 633         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 634         p_item = p_obj->p_waiting->p_item;
 635         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 636         vlc_mutex_unlock( &p_obj->object_lock );
 637         if( p_item )
 638         {
 639             if( !b_fetch_art )
 640             {
 641                 /* If the user doesn't want us to fetch meta automatically
 642                  * abort here. */
 643                 if( p_playlist->p_fetcher->b_fetch_meta )
 644                 {
 645                     input_MetaFetch( p_playlist, p_item );
 646                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 647                 }
 648
 649                 /*  Fetch right now */
 650                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 651                 {
 652                     vlc_mutex_lock( &p_obj->object_lock );
 653                     preparse_item_t p;
 654                     p.p_item = p_item;
 655                     p.b_fetch_art = VLC_TRUE;
 656                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 657                                  p_playlist->p_fetcher->i_waiting,
 658                                  0, p );
 659                     PL_DEBUG( "meta fetched for %s, get art", p_item->psz_name );
 660                     vlc_mutex_unlock( &p_obj->object_lock );
 661                     continue;
 662                 }
 663                 else
 664                     vlc_gc_decref( p_item );
 665             }
 666             else
 667             {
 668                 int i_ret;
 669
 670                 /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 671                  * (This can happen if we fetch art on play)
 672                  * FIXME this doesn't work if we need to fetch meta before art ... */
 673                 for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 674                 {
 675                     vlc_bool_t b_break;
 676                     PL_LOCK;
 677                     b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 678                                 p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 679                     PL_UNLOCK;
 680                     if( b_break )
 681                         break;
 682                     msleep( 50000 );
 683                 }
 684
 685                 i_ret = input_ArtFind( p_playlist, p_item );
 686                 if( i_ret == 1 )
 687                 {
 688                     PL_DEBUG( "downloading art for %s", p_item->psz_name );
 689                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 690                         input_item_SetArtNotFound( p_item, VLC_TRUE );
 691                     else {
 692                         input_item_SetArtFetched( p_item, VLC_TRUE );
 693                         var_SetInteger( p_playlist, "item-change",
 694                                         p_item->i_id );
 695                     }
 696                 }
 697                 else if( i_ret == 0 ) /* Was in cache */
 698                 {
 699                     PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 700                     input_item_SetArtFetched( p_item, VLC_TRUE );
 701                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 702                 }
 703                 else
 704                 {
 705                     PL_DEBUG( "art not found for %s", p_item->psz_name );
 706                     input_item_SetArtNotFound( p_item, VLC_TRUE );
 707                 }
 708                 vlc_gc_decref( p_item );
 709            }
 710         }
 711         vlc_object_lock( p_obj );
 712         i_activity = var_GetInteger( p_playlist, "activity" );
 713         if( i_activity < 0 ) i_activity = 0;
 714         vlc_object_unlock( p_obj );
 715         /* Sleep at least 1ms */
 716         msleep( (i_activity+1) * 1000 );
 717     }
 718 }
 719
 720 static void VariablesInit( playlist_t *p_playlist )
 721 {
 722     vlc_value_t val;
 723     /* These variables control updates */
 724     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 725     val.b_bool = VLC_TRUE;
 726     var_Set( p_playlist, "intf-change", val );
 727
 728     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 729     val.i_int = -1;
 730     var_Set( p_playlist, "item-change", val );
 731
 732     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 733     val.i_int = -1;
 734     var_Set( p_playlist, "item-deleted", val );
 735
 736     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 737
 738     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 739     val.i_int = -1;
 740     var_Set( p_playlist, "playlist-current", val );
 741
 742     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 743
 744     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 745     val.b_bool = VLC_TRUE;
 746     var_Set( p_playlist, "intf-show", val );
 747
 748     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 749     var_SetInteger( p_playlist, "activity", 0 );
 750
 751     /* Variables to control playback */
 752     var_CreateGetBool( p_playlist, "play-and-stop" );
 753     var_CreateGetBool( p_playlist, "play-and-exit" );
 754     var_CreateGetBool( p_playlist, "random" );
 755     var_CreateGetBool( p_playlist, "repeat" );
 756     var_CreateGetBool( p_playlist, "loop" );
 757
 758     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 759 }