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
  42 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  43                            vlc_value_t oldval, vlc_value_t newval, void *a )
  44 {
  45     (void)psz_cmd; (void)oldval; (void)newval; (void)a;
  46
  47     ((playlist_t*)p_this)->b_reset_currently_playing = VLC_TRUE;
  48     playlist_Signal( ((playlist_t*)p_this) );
  49     return VLC_SUCCESS;
  50 }
  51
  52 /**
  53  * Create playlist
  54  *
  55  * Create a playlist structure.
  56  * \param p_parent the vlc object that is to be the parent of this playlist
  57  * \return a pointer to the created playlist, or NULL on error
  58  */
  59 playlist_t * playlist_Create( vlc_object_t *p_parent )
  60 {
  61     playlist_t *p_playlist;
  62     vlc_bool_t b_save;
  63     int i_tree;
  64
  65     /* Allocate structure */
  66     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  67     if( !p_playlist )
  68     {
  69         msg_Err( p_parent, "out of memory" );
  70         return NULL;
  71     }
  72
  73     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
  74
  75     p_parent->p_libvlc->p_playlist = p_playlist;
  76
  77     VariablesInit( p_playlist );
  78
  79     /* Initialise data structures */
  80     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  81     p_playlist->i_last_playlist_id = 0;
  82     p_playlist->i_last_input_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->input_items );
  91     ARRAY_INIT( p_playlist->current );
  92
  93     p_playlist->i_current_index = 0;
  94     p_playlist->b_reset_currently_playing = VLC_TRUE;
  95     p_playlist->last_rebuild_date = 0;
  96
  97     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  98     p_playlist->b_always_tree = (i_tree == 1);
  99     p_playlist->b_never_tree = (i_tree == 2);
 100
 101     p_playlist->b_doing_ml = VLC_FALSE;
 102
 103     p_playlist->b_auto_preparse =
 104                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
 105
 106     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 107                                     0, NULL );
 108     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 109                                     0, p_playlist->p_root_category->p_input );
 110
 111     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 112         return NULL;
 113
 114     /* Create playlist and media library */
 115     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 116                             &p_playlist->p_local_category,
 117                             &p_playlist->p_local_onelevel, VLC_FALSE );
 118
 119     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 120     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 121
 122     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 123         !p_playlist->p_local_category->p_input ||
 124         !p_playlist->p_local_onelevel->p_input )
 125         return NULL;
 126
 127     if( config_GetInt( p_playlist, "media-library") )
 128     {
 129         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 130                             &p_playlist->p_ml_category,
 131                             &p_playlist->p_ml_onelevel, VLC_FALSE );
 132
 133         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 134             return NULL;
 135
 136         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 137         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 138     }
 139     else
 140     {
 141         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 142     }
 143
 144     /* Initial status */
 145     p_playlist->status.p_item = NULL;
 146     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 147     p_playlist->request.b_request = VLC_FALSE;
 148     p_playlist->status.i_status = PLAYLIST_STOPPED;
 149
 150     p_playlist->i_sort = SORT_ID;
 151     p_playlist->i_order = ORDER_NORMAL;
 152
 153
 154     b_save = p_playlist->b_auto_preparse;
 155     p_playlist->b_auto_preparse = VLC_FALSE;
 156     playlist_MLLoad( p_playlist );
 157     p_playlist->b_auto_preparse = VLC_TRUE;
 158     return p_playlist;
 159 }
 160
 161 /**
 162  * Destroy playlist
 163  *
 164  * Destroy a playlist structure.
 165  * \param p_playlist the playlist object
 166  * \return nothing
 167  */
 168 void playlist_Destroy( playlist_t *p_playlist )
 169 {
 170     var_Destroy( p_playlist, "intf-change" );
 171     var_Destroy( p_playlist, "item-change" );
 172     var_Destroy( p_playlist, "playlist-current" );
 173     var_Destroy( p_playlist, "intf-popupmenu" );
 174     var_Destroy( p_playlist, "intf-show" );
 175     var_Destroy( p_playlist, "play-and-stop" );
 176     var_Destroy( p_playlist, "play-and-exit" );
 177     var_Destroy( p_playlist, "random" );
 178     var_Destroy( p_playlist, "repeat" );
 179     var_Destroy( p_playlist, "loop" );
 180     var_Destroy( p_playlist, "activity" );
 181
 182     vlc_mutex_destroy( &p_playlist->gc_lock );
 183     vlc_object_detach( p_playlist );
 184     vlc_object_release( p_playlist );
 185 }
 186
 187 /* Destroy remaining objects */
 188 static void ObjectGarbageCollector( playlist_t *p_playlist, vlc_bool_t b_force )
 189 {
 190     vlc_object_t *p_obj;
 191
 192     if( !b_force )
 193     {
 194         if( mdate() - p_playlist->gc_date < 1000000 )
 195         {
 196             p_playlist->b_cant_sleep = VLC_TRUE;
 197             return;
 198         }
 199         else if( p_playlist->gc_date == 0 )
 200             return;
 201     }
 202
 203     vlc_mutex_lock( &p_playlist->gc_lock );
 204     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 205                                                   FIND_CHILD ) ) )
 206     {
 207         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 208         {
 209             vlc_object_release( p_obj );
 210             break;
 211         }
 212         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 213         vlc_object_detach( p_obj );
 214         vlc_object_release( p_obj );
 215         vout_Destroy( (vout_thread_t *)p_obj );
 216     }
 217     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 218                                                   FIND_CHILD ) ) )
 219     {
 220         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 221         {
 222             vlc_object_release( p_obj );
 223             break;
 224         }
 225         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 226         vlc_object_detach( p_obj );
 227         vlc_object_release( p_obj );
 228         sout_DeleteInstance( (sout_instance_t*)p_obj );
 229     }
 230     p_playlist->b_cant_sleep = VLC_FALSE;
 231     vlc_mutex_unlock( &p_playlist->gc_lock );
 232 }
 233
 234 /**
 235  * Main loop
 236  *
 237  * Main loop for the playlist
 238  * \param p_playlist the playlist object
 239  * \return nothing
 240  */
 241 void playlist_MainLoop( playlist_t *p_playlist )
 242 {
 243     playlist_item_t *p_item = NULL;
 244     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 245     PL_LOCK;
 246
 247     if( p_playlist->b_reset_currently_playing &&
 248         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 249     {
 250         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 251                              p_playlist->status.p_item );
 252         p_playlist->last_rebuild_date = mdate();
 253     }
 254
 255 check_input:
 256     /* If there is an input, check that it doesn't need to die. */
 257     if( p_playlist->p_input )
 258     {
 259         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 260         {
 261             PL_DEBUG( "incoming request - stopping current input" );
 262             input_StopThread( p_playlist->p_input );
 263         }
 264
 265         /* This input is dead. Remove it ! */
 266         if( p_playlist->p_input->b_dead )
 267         {
 268             int i_activity;
 269             input_thread_t *p_input;
 270             PL_DEBUG( "dead input" );
 271
 272             p_input = p_playlist->p_input;
 273             p_playlist->p_input = NULL;
 274
 275             /* Release the playlist lock, because we may get stuck
 276              * in input_DestroyThread() for some time. */
 277             PL_UNLOCK;
 278
 279             /* Destroy input */
 280             input_DestroyThread( p_input );
 281
 282             PL_LOCK;
 283
 284             p_playlist->gc_date = mdate();
 285             p_playlist->b_cant_sleep = VLC_TRUE;
 286
 287             if( p_playlist->status.p_item->i_flags
 288                 & PLAYLIST_REMOVE_FLAG )
 289             {
 290                  PL_DEBUG( "%s was marked for deletion, deleting",
 291                                  PLI_NAME( p_playlist->status.p_item  ) );
 292                  playlist_ItemDelete( p_playlist->status.p_item );
 293                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 294                      p_playlist->request.p_item = NULL;
 295                  p_playlist->status.p_item = NULL;
 296             }
 297
 298             i_activity= var_GetInteger( p_playlist, "activity" );
 299             var_SetInteger( p_playlist, "activity", i_activity -
 300                             DEFAULT_INPUT_ACTIVITY );
 301             goto check_input;
 302         }
 303         /* This input is dying, let it do */
 304         else if( p_playlist->p_input->b_die )
 305         {
 306             PL_DEBUG( "dying input" );
 307             PL_UNLOCK;
 308             msleep( INTF_IDLE_SLEEP );
 309             PL_LOCK;
 310             goto check_input;
 311         }
 312         /* This input has finished, ask it to die ! */
 313         else if( p_playlist->p_input->b_error
 314                   || p_playlist->p_input->b_eof )
 315         {
 316             PL_DEBUG( "finished input" );
 317             input_StopThread( p_playlist->p_input );
 318             /* No need to wait here, we'll wait in the p_input->b_die case */
 319             goto check_input;
 320         }
 321         else if( p_playlist->p_input->i_state != INIT_S )
 322         {
 323             PL_UNLOCK;
 324             ObjectGarbageCollector( p_playlist, VLC_FALSE );
 325             PL_LOCK;
 326         }
 327     }
 328     else
 329     {
 330         /* No input. Several cases
 331          *  - No request, running status -> start new item
 332          *  - No request, stopped status -> collect garbage
 333          *  - Request, running requested -> start new item
 334          *  - Request, stopped requested -> collect garbage
 335         */
 336         if( p_playlist->request.i_status != PLAYLIST_STOPPED )
 337         {
 338             msg_Dbg( p_playlist, "starting new item" );
 339             p_item = playlist_NextItem( p_playlist );
 340
 341             if( p_item == NULL )
 342             {
 343                 msg_Dbg( p_playlist, "nothing to play" );
 344                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 345                 PL_UNLOCK;
 346
 347                 if( b_playexit == VLC_TRUE )
 348                 {
 349                     msg_Info( p_playlist, "end of playlist, exiting" );
 350                     vlc_object_kill( p_playlist->p_libvlc );
 351                 }
 352                 ObjectGarbageCollector( p_playlist, VLC_TRUE );
 353                 return;
 354              }
 355              playlist_PlayItem( p_playlist, p_item );
 356          }
 357          else
 358          {
 359             const vlc_bool_t b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 360
 361             p_playlist->status.i_status = PLAYLIST_STOPPED;
 362             if( p_playlist->status.p_item &&
 363                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 364             {
 365                 PL_DEBUG( "deleting item marked for deletion" );
 366                 playlist_ItemDelete( p_playlist->status.p_item );
 367                 p_playlist->status.p_item = NULL;
 368             }
 369
 370             /* Collect garbage */
 371             PL_UNLOCK;
 372             ObjectGarbageCollector( p_playlist, b_gc_forced );
 373             PL_LOCK;
 374         }
 375     }
 376     PL_UNLOCK;
 377 }
 378
 379
 380 /**
 381  * Last loop
 382  *
 383  * The playlist is dying so do the last loop
 384  * \param p_playlist the playlist object
 385  * \return nothing
 386 */
 387 void playlist_LastLoop( playlist_t *p_playlist )
 388 {
 389     vlc_object_t *p_obj;
 390
 391     /* If there is an input, kill it */
 392     while( 1 )
 393     {
 394         PL_LOCK;
 395         if( p_playlist->p_input == NULL )
 396         {
 397             PL_UNLOCK;
 398             break;
 399         }
 400
 401         if( p_playlist->p_input->b_dead )
 402         {
 403             input_thread_t *p_input;
 404
 405             /* Unlink current input */
 406             p_input = p_playlist->p_input;
 407             p_playlist->p_input = NULL;
 408             PL_UNLOCK;
 409
 410             /* Destroy input */
 411             input_DestroyThread( p_input );
 412             continue;
 413         }
 414         else if( p_playlist->p_input->b_die )
 415         {
 416             /* This input is dying, leave it alone */
 417             ;
 418         }
 419         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 420         {
 421             input_StopThread( p_playlist->p_input );
 422             PL_UNLOCK;
 423             continue;
 424         }
 425         else
 426         {
 427             p_playlist->p_input->b_eof = 1;
 428         }
 429         PL_UNLOCK;
 430
 431         msleep( INTF_IDLE_SLEEP );
 432     }
 433
 434     /* close all remaining sout */
 435     while( ( p_obj = vlc_object_find( p_playlist,
 436                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 437     {
 438         vlc_object_detach( p_obj );
 439         vlc_object_release( p_obj );
 440         sout_DeleteInstance( (sout_instance_t*)p_obj );
 441     }
 442
 443     /* close all remaining vout */
 444     while( ( p_obj = vlc_object_find( p_playlist,
 445                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 446     {
 447         vlc_object_detach( p_obj );
 448         vlc_object_release( p_obj );
 449         vout_Destroy( (vout_thread_t *)p_obj );
 450     }
 451
 452     while( p_playlist->i_sds )
 453     {
 454         playlist_ServicesDiscoveryRemove( p_playlist,
 455                                           p_playlist->pp_sds[0]->p_sd->psz_module );
 456     }
 457
 458     playlist_MLDump( p_playlist );
 459
 460     PL_LOCK;
 461     /* Go through all items, and simply free everything without caring
 462      * about the tree structure. Do not decref, it will be done by doing
 463      * the same thing on the input items array */
 464     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 465         free( p_del->pp_children );
 466         free( p_del );
 467     FOREACH_END();
 468     ARRAY_RESET( p_playlist->all_items );
 469
 470     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 471         input_ItemClean( p_del );
 472         free( p_del );
 473     FOREACH_END();
 474     ARRAY_RESET( p_playlist->input_items );
 475
 476     ARRAY_RESET( p_playlist->items );
 477     ARRAY_RESET( p_playlist->current );
 478
 479     PL_UNLOCK;
 480 }
 481
 482 /**
 483  * Preparse loop
 484  *
 485  * Main loop for preparser queue
 486  * \param p_obj items to preparse
 487  * \return nothing
 488  */
 489 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 490 {
 491     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 492     input_item_t *p_current;
 493     int i_activity;
 494     uint32_t i_m, i_o;
 495
 496     while( !p_playlist->b_die )
 497     {
 498         vlc_object_lock( p_obj );
 499         while( p_obj->i_waiting == 0 )
 500         {
 501             if( vlc_object_wait( p_obj ) || p_playlist->b_die )
 502             {
 503                 vlc_object_unlock( p_obj );
 504                 return;
 505             }
 506         }
 507
 508         p_current = p_obj->pp_waiting[0];
 509         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 510         vlc_object_unlock( p_obj );
 511
 512         PL_LOCK;
 513         if( p_current )
 514         {
 515             if( p_current->i_type == ITEM_TYPE_FILE )
 516             {
 517                 stats_TimerStart( p_playlist, "Preparse run",
 518                                   STATS_TIMER_PREPARSE );
 519                 /* Do not preparse if it is already done (like by playing it) */
 520                 if( !input_item_IsPreparsed( p_current ) )
 521                 {
 522                     PL_UNLOCK;
 523                     input_Preparse( p_playlist, p_current );
 524                     PL_LOCK;
 525                 }
 526                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 527                 PL_UNLOCK;
 528                 input_item_SetPreparsed( p_current, VLC_TRUE );
 529                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 530                 PL_LOCK;
 531             }
 532             /* If we haven't retrieved enough meta, add to secondary queue
 533              * which will run the "meta fetchers".
 534              * This only checks for meta, not for art
 535              * \todo don't do this for things we won't get meta for, like vids
 536              */
 537             char *psz_arturl = input_item_GetArtURL( p_current );
 538             char *psz_name = input_item_GetName( p_current );
 539             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 540             {
 541                 preparse_item_t p;
 542                 PL_DEBUG( "need to fetch meta for %s", p_current->psz_name );
 543                 p.p_item = p_current;
 544                 p.b_fetch_art = VLC_FALSE;
 545                 vlc_object_lock( p_playlist->p_fetcher );
 546                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 547                              p_playlist->p_fetcher->i_waiting,
 548                              p_playlist->p_fetcher->i_waiting, p);
 549                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 550                 vlc_object_unlock( p_playlist->p_fetcher );
 551             }
 552             /* We already have all needed meta, but we need art right now */
 553             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 554                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 555             {
 556                 preparse_item_t p;
 557                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 558                 p.p_item = p_current;
 559                 p.b_fetch_art = VLC_TRUE;
 560                 vlc_object_lock( p_playlist->p_fetcher );
 561                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 562                              p_playlist->p_fetcher->i_waiting,
 563                              p_playlist->p_fetcher->i_waiting, p);
 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     }
 587 }
 588
 589 /**
 590  * Fetcher loop
 591  *
 592  * Main loop for secondary preparser queue
 593  * \param p_obj items to preparse
 594  * \return nothing
 595  */
 596 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 597 {
 598     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 599     vlc_bool_t b_fetch_art;
 600     input_item_t *p_item;
 601     int i_activity;
 602
 603     while( !p_playlist->b_die )
 604     {
 605         vlc_mutex_lock( &p_obj->object_lock );
 606         while( p_obj->i_waiting == 0 )
 607         {
 608             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 609             if( p_playlist->b_die )
 610             {
 611                 vlc_mutex_unlock( &p_obj->object_lock );
 612                 return;
 613             }
 614         }
 615
 616         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 617         p_item = p_obj->p_waiting->p_item;
 618         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 619         vlc_mutex_unlock( &p_obj->object_lock );
 620         if( p_item )
 621         {
 622             if( !b_fetch_art )
 623             {
 624                 /* If the user doesn't want us to fetch meta automatically
 625                  * abort here. */
 626                 if( p_playlist->p_fetcher->b_fetch_meta )
 627                 {
 628                     input_MetaFetch( p_playlist, p_item );
 629                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 630                 }
 631
 632                 /*  Fetch right now */
 633                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 634                 {
 635                     vlc_mutex_lock( &p_obj->object_lock );
 636                     preparse_item_t p;
 637                     p.p_item = p_item;
 638                     p.b_fetch_art = VLC_TRUE;
 639                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 640                                  p_playlist->p_fetcher->i_waiting,
 641                                  0, p );
 642                     PL_DEBUG( "meta fetched for %s, get art", p_item->psz_name );
 643                     vlc_mutex_unlock( &p_obj->object_lock );
 644                     continue;
 645                 }
 646                 else
 647                     vlc_gc_decref( p_item );
 648             }
 649             else
 650             {
 651                 int i_ret;
 652
 653                 /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 654                  * (This can happen if we fetch art on play)
 655                  * FIXME this doesn't work if we need to fetch meta before art ... */
 656                 for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 657                 {
 658                     vlc_bool_t b_break;
 659                     PL_LOCK;
 660                     b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 661                                 p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 662                     PL_UNLOCK;
 663                     if( b_break )
 664                         break;
 665                     msleep( 50000 );
 666                 }
 667
 668                 i_ret = input_ArtFind( p_playlist, p_item );
 669                 if( i_ret == 1 )
 670                 {
 671                     PL_DEBUG( "downloading art for %s", p_item->psz_name );
 672                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 673                         input_item_SetArtNotFound( p_item, VLC_TRUE );
 674                     else {
 675                         input_item_SetArtFetched( p_item, VLC_TRUE );
 676                         var_SetInteger( p_playlist, "item-change",
 677                                         p_item->i_id );
 678                     }
 679                 }
 680                 else if( i_ret == 0 ) /* Was in cache */
 681                 {
 682                     PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 683                     input_item_SetArtFetched( p_item, VLC_TRUE );
 684                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 685                 }
 686                 else
 687                 {
 688                     PL_DEBUG( "art not found for %s", p_item->psz_name );
 689                     input_item_SetArtNotFound( p_item, VLC_TRUE );
 690                 }
 691                 vlc_gc_decref( p_item );
 692            }
 693         }
 694         vlc_object_lock( p_obj );
 695         i_activity = var_GetInteger( p_playlist, "activity" );
 696         if( i_activity < 0 ) i_activity = 0;
 697         vlc_object_unlock( p_obj );
 698         /* Sleep at least 1ms */
 699         msleep( (i_activity+1) * 1000 );
 700     }
 701 }
 702
 703 static void VariablesInit( playlist_t *p_playlist )
 704 {
 705     vlc_value_t val;
 706     /* These variables control updates */
 707     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 708     val.b_bool = VLC_TRUE;
 709     var_Set( p_playlist, "intf-change", val );
 710
 711     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 712     val.i_int = -1;
 713     var_Set( p_playlist, "item-change", val );
 714
 715     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 716     val.i_int = -1;
 717     var_Set( p_playlist, "item-deleted", val );
 718
 719     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 720
 721     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 722     val.i_int = -1;
 723     var_Set( p_playlist, "playlist-current", val );
 724
 725     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 726
 727     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 728     val.b_bool = VLC_TRUE;
 729     var_Set( p_playlist, "intf-show", val );
 730
 731     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 732     var_SetInteger( p_playlist, "activity", 0 );
 733
 734     /* Variables to control playback */
 735     var_CreateGetBool( p_playlist, "play-and-stop" );
 736     var_CreateGetBool( p_playlist, "play-and-exit" );
 737     var_CreateGetBool( p_playlist, "random" );
 738     var_CreateGetBool( p_playlist, "repeat" );
 739     var_CreateGetBool( p_playlist, "loop" );
 740
 741     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 742 }