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 #include <vlc/vlc.h>
  26 #include <vlc_vout.h>
  27 #include <vlc_sout.h>
  28 #include <vlc_playlist.h>
  29 #include <vlc_interface.h>
  30 #include "playlist_internal.h"
  31 #include "stream_output/stream_output.h" /* sout_DeleteInstance */
  32
  33 /*****************************************************************************
  34  * Local prototypes
  35  *****************************************************************************/
  36 static void VariablesInit( playlist_t *p_playlist );
  37
  38 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  39                            vlc_value_t oldval, vlc_value_t newval, void *a )
  40 {
  41     (void)psz_cmd; (void)oldval; (void)newval; (void)a;
  42
  43     ((playlist_t*)p_this)->b_reset_currently_playing = VLC_TRUE;
  44     playlist_Signal( ((playlist_t*)p_this) );
  45     return VLC_SUCCESS;
  46 }
  47
  48 /**
  49  * Create playlist
  50  *
  51  * Create a playlist structure.
  52  * \param p_parent the vlc object that is to be the parent of this playlist
  53  * \return a pointer to the created playlist, or NULL on error
  54  */
  55 playlist_t * playlist_Create( vlc_object_t *p_parent )
  56 {
  57     playlist_t *p_playlist;
  58     vlc_bool_t b_save;
  59     int i_tree;
  60
  61     /* Allocate structure */
  62     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  63     if( !p_playlist )
  64     {
  65         msg_Err( p_parent, "out of memory" );
  66         return NULL;
  67     }
  68
  69     p_playlist->p_internal = malloc(sizeof(struct playlist_internal_t));
  70     memset( p_playlist->p_internal, 0, sizeof(struct playlist_internal_t) );
  71
  72     p_parent->p_libvlc->p_playlist = p_playlist;
  73
  74     VariablesInit( p_playlist );
  75
  76     /* Initialise data structures */
  77     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  78     p_playlist->i_last_playlist_id = 0;
  79     p_playlist->i_last_input_id = 0;
  80     p_playlist->p_input = NULL;
  81
  82     p_playlist->gc_date = 0;
  83     p_playlist->b_cant_sleep = VLC_FALSE;
  84
  85     ARRAY_INIT( p_playlist->items );
  86     ARRAY_INIT( p_playlist->all_items );
  87     ARRAY_INIT( p_playlist->input_items );
  88     ARRAY_INIT( p_playlist->current );
  89
  90     p_playlist->i_current_index = 0;
  91     p_playlist->b_reset_currently_playing = VLC_TRUE;
  92     p_playlist->last_rebuild_date = 0;
  93
  94     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  95     p_playlist->b_always_tree = (i_tree == 1);
  96     p_playlist->b_never_tree = (i_tree == 2);
  97
  98     p_playlist->b_doing_ml = VLC_FALSE;
  99
 100     p_playlist->b_auto_preparse =
 101                         var_CreateGetBool( p_playlist, "auto-preparse") ;
 102
 103     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 104                                                        0 );
 105     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 106                                                        0 );
 107
 108     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 109         return NULL;
 110
 111     /* Create playlist and media library */
 112     p_playlist->p_local_category = playlist_NodeCreate( p_playlist,
 113                               _( "Playlist" ),p_playlist->p_root_category, 0 );
 114     p_playlist->p_local_onelevel =  playlist_NodeCreate( p_playlist,
 115                               _( "Playlist" ), p_playlist->p_root_onelevel, 0 );
 116     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 117     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 118
 119     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 120         !p_playlist->p_local_category->p_input ||
 121         !p_playlist->p_local_onelevel->p_input )
 122         return NULL;
 123
 124     /* Link the nodes together. Todo: actually create them from the same input*/
 125     p_playlist->p_local_onelevel->p_input->i_id =
 126         p_playlist->p_local_category->p_input->i_id;
 127
 128     if( config_GetInt( p_playlist, "media-library") )
 129     {
 130         p_playlist->p_ml_category =   playlist_NodeCreate( p_playlist,
 131                          _( "Media Library" ), p_playlist->p_root_category, 0 );
 132         p_playlist->p_ml_onelevel =  playlist_NodeCreate( p_playlist,
 133                          _( "Media Library" ), p_playlist->p_root_onelevel, 0 );
 134
 135         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 136             return NULL;
 137
 138         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 139         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 140         p_playlist->p_ml_onelevel->p_input->i_id =
 141              p_playlist->p_ml_category->p_input->i_id;
 142
 143     }
 144     else
 145     {
 146         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 147     }
 148
 149     /* Initial status */
 150     p_playlist->status.p_item = NULL;
 151     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 152     p_playlist->request.b_request = VLC_FALSE;
 153     p_playlist->status.i_status = PLAYLIST_STOPPED;
 154
 155     p_playlist->i_sort = SORT_ID;
 156     p_playlist->i_order = ORDER_NORMAL;
 157
 158     b_save = p_playlist->b_auto_preparse;
 159     p_playlist->b_auto_preparse = VLC_FALSE;
 160     playlist_MLLoad( p_playlist );
 161     p_playlist->b_auto_preparse = VLC_TRUE;
 162     return p_playlist;
 163 }
 164
 165 void playlist_Destroy( playlist_t *p_playlist )
 166 {
 167     var_Destroy( p_playlist, "intf-change" );
 168     var_Destroy( p_playlist, "item-change" );
 169     var_Destroy( p_playlist, "playlist-current" );
 170     var_Destroy( p_playlist, "intf-popmenu" );
 171     var_Destroy( p_playlist, "intf-show" );
 172     var_Destroy( p_playlist, "play-and-stop" );
 173     var_Destroy( p_playlist, "play-and-exit" );
 174     var_Destroy( p_playlist, "random" );
 175     var_Destroy( p_playlist, "repeat" );
 176     var_Destroy( p_playlist, "loop" );
 177     var_Destroy( p_playlist, "activity" );
 178
 179     vlc_mutex_destroy( &p_playlist->gc_lock );
 180     vlc_object_detach( p_playlist );
 181     free( p_playlist->p_internal );
 182     vlc_object_destroy( p_playlist );
 183 }
 184
 185 /* Destroy remaining objects */
 186 static void ObjectGarbageCollector( playlist_t *p_playlist, vlc_bool_t b_force )
 187 {
 188     vlc_object_t *p_obj;
 189
 190     if( !b_force )
 191     {
 192         if( mdate() - p_playlist->gc_date < 1000000 )
 193         {
 194             p_playlist->b_cant_sleep = VLC_TRUE;
 195             return;
 196         }
 197         else if( p_playlist->gc_date == 0 )
 198             return;
 199     }
 200
 201     vlc_mutex_lock( &p_playlist->gc_lock );
 202     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
 203                                                   FIND_CHILD ) ) )
 204     {
 205         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 206         {
 207             vlc_object_release( p_obj );
 208             break;
 209         }
 210         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 211         vlc_object_detach( p_obj );
 212         vlc_object_release( p_obj );
 213         vout_Destroy( (vout_thread_t *)p_obj );
 214     }
 215     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 216                                                   FIND_CHILD ) ) )
 217     {
 218         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 219         {
 220             vlc_object_release( p_obj );
 221             break;
 222         }
 223         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 224         vlc_object_detach( p_obj );
 225         vlc_object_release( p_obj );
 226         sout_DeleteInstance( (sout_instance_t*)p_obj );
 227     }
 228     p_playlist->b_cant_sleep = VLC_FALSE;
 229     vlc_mutex_unlock( &p_playlist->gc_lock );
 230 }
 231
 232 /** Main loop for the playlist */
 233 void playlist_MainLoop( playlist_t *p_playlist )
 234 {
 235     playlist_item_t *p_item = NULL;
 236     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 237     PL_LOCK;
 238
 239     if( p_playlist->b_reset_currently_playing &&
 240         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 241     {
 242         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
 243                              p_playlist->status.p_item );
 244         p_playlist->last_rebuild_date = mdate();
 245     }
 246
 247 check_input:
 248     /* If there is an input, check that it doesn't need to die. */
 249     if( p_playlist->p_input )
 250     {
 251         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 252         {
 253             PL_DEBUG( "incoming request - stopping current input" );
 254             input_StopThread( p_playlist->p_input );
 255         }
 256
 257         /* This input is dead. Remove it ! */
 258         if( p_playlist->p_input->b_dead )
 259         {
 260             int i_activity;
 261             input_thread_t *p_input;
 262             PL_DEBUG( "dead input" );
 263
 264             p_input = p_playlist->p_input;
 265             p_playlist->p_input = NULL;
 266
 267             /* Release the playlist lock, because we may get stuck
 268              * in input_DestroyThread() for some time. */
 269             PL_UNLOCK
 270
 271             /* Destroy input */
 272             input_DestroyThread( p_input );
 273
 274             PL_LOCK;
 275
 276             p_playlist->gc_date = mdate();
 277             p_playlist->b_cant_sleep = VLC_TRUE;
 278
 279             if( p_playlist->status.p_item->i_flags
 280                 & PLAYLIST_REMOVE_FLAG )
 281             {
 282                  PL_DEBUG( "%s was marked for deletion, deleting",
 283                                  PLI_NAME( p_playlist->status.p_item  ) );
 284                  playlist_ItemDelete( p_playlist->status.p_item );
 285                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 286                      p_playlist->request.p_item = NULL;
 287                  p_playlist->status.p_item = NULL;
 288             }
 289
 290             i_activity= var_GetInteger( p_playlist, "activity") ;
 291             var_SetInteger( p_playlist, "activity", i_activity -
 292                             DEFAULT_INPUT_ACTIVITY );
 293             goto check_input;
 294         }
 295         /* This input is dying, let it do */
 296         else if( p_playlist->p_input->b_die )
 297         {
 298             PL_DEBUG( "dying input" );
 299             PL_UNLOCK;
 300             msleep( 25000 ); // 25 ms
 301             PL_LOCK;
 302             goto check_input;
 303         }
 304         /* This input has finished, ask it to die ! */
 305         else if( p_playlist->p_input->b_error
 306                   || p_playlist->p_input->b_eof )
 307         {
 308             PL_DEBUG( "finished input" );
 309             input_StopThread( p_playlist->p_input );
 310             /* No need to wait here, we'll wait in the p_input->b_die case */
 311             goto check_input;
 312         }
 313         else if( p_playlist->p_input->i_state != INIT_S )
 314         {
 315             PL_UNLOCK;
 316             ObjectGarbageCollector( p_playlist, VLC_FALSE );
 317             PL_LOCK;
 318         }
 319     }
 320     else
 321     {
 322         /* No input. Several cases
 323          *  - No request, running status -> start new item
 324          *  - No request, stopped status -> collect garbage
 325          *  - Request, running requested -> start new item
 326          *  - Request, stopped requested -> collect garbage
 327          */
 328          if( (!p_playlist->request.b_request &&
 329               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 330               ( p_playlist->request.b_request &&
 331                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 332          {
 333              msg_Dbg( p_playlist, "starting new item" );
 334              p_item = playlist_NextItem( p_playlist );
 335
 336              if( p_item == NULL )
 337              {
 338                 msg_Dbg( p_playlist, "nothing to play" );
 339                 if( b_playexit == VLC_TRUE )
 340                 {
 341                     msg_Info( p_playlist, "end of playlist, exiting" );
 342                     vlc_object_kill( p_playlist->p_libvlc );
 343                 }
 344                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 345                 PL_UNLOCK
 346
 347                 ObjectGarbageCollector( p_playlist, VLC_TRUE );
 348                 return;
 349              }
 350              playlist_PlayItem( p_playlist, p_item );
 351          }
 352          else
 353          {
 354             const vlc_bool_t b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 355
 356             p_playlist->status.i_status = PLAYLIST_STOPPED;
 357             if( p_playlist->status.p_item &&
 358                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 359             {
 360                 PL_DEBUG( "deleting item marked for deletion" );
 361                 playlist_ItemDelete( p_playlist->status.p_item );
 362                 p_playlist->status.p_item = NULL;
 363             }
 364
 365             /* Collect garbage */
 366             PL_UNLOCK;
 367             ObjectGarbageCollector( p_playlist, b_gc_forced );
 368             PL_LOCK;
 369         }
 370     }
 371     PL_UNLOCK
 372 }
 373
 374 /** Playlist dying last loop */
 375 void playlist_LastLoop( playlist_t *p_playlist )
 376 {
 377     vlc_object_t *p_obj;
 378
 379     /* If there is an input, kill it */
 380     while( 1 )
 381     {
 382         PL_LOCK
 383
 384         if( p_playlist->p_input == NULL )
 385         {
 386             PL_UNLOCK
 387             break;
 388         }
 389
 390         if( p_playlist->p_input->b_dead )
 391         {
 392             input_thread_t *p_input;
 393
 394             /* Unlink current input */
 395             p_input = p_playlist->p_input;
 396             p_playlist->p_input = NULL;
 397             PL_UNLOCK
 398
 399             /* Destroy input */
 400             input_DestroyThread( p_input );
 401             continue;
 402         }
 403         else if( p_playlist->p_input->b_die )
 404         {
 405             /* This input is dying, leave it alone */
 406             ;
 407         }
 408         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 409         {
 410             input_StopThread( p_playlist->p_input );
 411             PL_UNLOCK
 412             continue;
 413         }
 414         else
 415         {
 416             p_playlist->p_input->b_eof = 1;
 417         }
 418
 419         PL_UNLOCK
 420
 421         msleep( INTF_IDLE_SLEEP );
 422     }
 423
 424     /* close all remaining sout */
 425     while( ( p_obj = vlc_object_find( p_playlist,
 426                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 427     {
 428         vlc_object_detach( p_obj );
 429         vlc_object_release( p_obj );
 430         sout_DeleteInstance( (sout_instance_t*)p_obj );
 431     }
 432
 433     /* close all remaining vout */
 434     while( ( p_obj = vlc_object_find( p_playlist,
 435                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 436     {
 437         vlc_object_detach( p_obj );
 438         vlc_object_release( p_obj );
 439         vout_Destroy( (vout_thread_t *)p_obj );
 440     }
 441
 442     while( p_playlist->p_internal->i_asds )
 443     {
 444         playlist_ServicesDiscoveryRemove( p_playlist,
 445                                           p_playlist->p_internal->pp_asds[0]->p_sd->psz_module );
 446     }
 447
 448     playlist_MLDump( p_playlist );
 449
 450     PL_LOCK;
 451     /* Go through all items, and simply free everything without caring
 452      * about the tree structure. Do not decref, it will be done by doing
 453      * the same thing on the input items array */
 454     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 455         free( p_del->pp_children );
 456         free( p_del );
 457     FOREACH_END();
 458     ARRAY_RESET( p_playlist->all_items );
 459
 460     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 461         input_ItemClean( p_del );
 462         free( p_del );
 463     FOREACH_END();
 464     ARRAY_RESET( p_playlist->input_items );
 465
 466     ARRAY_RESET( p_playlist->items );
 467     ARRAY_RESET( p_playlist->current );
 468
 469     PL_UNLOCK;
 470 }
 471
 472 /** Main loop for preparser queue */
 473 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 474 {
 475     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 476     input_item_t *p_current;
 477     int i_activity;
 478     uint32_t i_m, i_o;
 479
 480     while( !p_playlist->b_die )
 481     {
 482         vlc_mutex_lock( &p_obj->object_lock );
 483         while( p_obj->i_waiting == 0 )
 484         {
 485             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 486             if( p_playlist->b_die )
 487             {
 488                 vlc_mutex_unlock( &p_obj->object_lock );
 489                 return;
 490             }
 491         }
 492
 493         p_current = p_obj->pp_waiting[0];
 494         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 495         vlc_mutex_unlock( &p_obj->object_lock );
 496
 497         PL_LOCK;
 498         if( p_current )
 499         {
 500             vlc_bool_t b_preparsed = VLC_FALSE;
 501             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
 502                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
 503                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
 504                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
 505                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
 506                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
 507                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
 508                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
 509             {
 510                 b_preparsed = VLC_TRUE;
 511                 stats_TimerStart( p_playlist, "Preparse run",
 512                                   STATS_TIMER_PREPARSE );
 513                 /* Do not preparse if it is already done (like by playing it) */
 514                 if( !input_item_IsPreparsed( p_current ) )
 515                 {
 516                     PL_UNLOCK;
 517                     input_Preparse( p_playlist, p_current );
 518                     PL_LOCK;
 519                 }
 520                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 521             }
 522             PL_UNLOCK;
 523             if( b_preparsed )
 524             {
 525                 input_item_SetPreparsed( p_current, VLC_TRUE );
 526                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 527             }
 528             PL_LOCK;
 529
 530             /* If we haven't retrieved enough meta, add to secondary queue
 531              * which will run the "meta fetchers".
 532              * This only checks for meta, not for art
 533              * \todo don't do this for things we won't get meta for, like vids
 534              */
 535             char *psz_arturl = input_item_GetArtURL( p_current );
 536             char *psz_name = input_item_GetName( p_current );
 537             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
 538             {
 539                 preparse_item_t p;
 540                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
 541                 p.p_item = p_current;
 542                 p.b_fetch_art = VLC_FALSE;
 543                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 544                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 545                              p_playlist->p_fetcher->i_waiting,
 546                              p_playlist->p_fetcher->i_waiting, p);
 547                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 548                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 549             }
 550             /* We already have all needed meta, but we need art right now */
 551             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 552                      EMPTY_STR( psz_arturl ) )
 553             {
 554                 preparse_item_t p;
 555                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 556                 p.p_item = p_current;
 557                 p.b_fetch_art = VLC_TRUE;
 558                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
 559                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 560                              p_playlist->p_fetcher->i_waiting,
 561                              p_playlist->p_fetcher->i_waiting, p);
 562                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
 563                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
 564             }
 565             else
 566             {
 567                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 568                           psz_name, psz_arturl );
 569                 vlc_gc_decref( p_current );
 570             }
 571             free( psz_name );
 572             free( psz_arturl );
 573             PL_UNLOCK;
 574         }
 575         else
 576             PL_UNLOCK;
 577
 578         vlc_mutex_lock( &p_obj->object_lock );
 579         i_activity = var_GetInteger( p_playlist, "activity" );
 580         if( i_activity < 0 ) i_activity = 0;
 581         vlc_mutex_unlock( &p_obj->object_lock );
 582         /* Sleep at least 1ms */
 583         msleep( (i_activity+1) * 1000 );
 584     }
 585 }
 586
 587 /** Main loop for secondary preparser queue */
 588 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 589 {
 590     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 591     vlc_bool_t b_fetch_art;
 592     input_item_t *p_item;
 593     int i_activity;
 594
 595     while( !p_playlist->b_die )
 596     {
 597         vlc_mutex_lock( &p_obj->object_lock );
 598         while( p_obj->i_waiting == 0 )
 599         {
 600             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 601             if( p_playlist->b_die )
 602             {
 603                 vlc_mutex_unlock( &p_obj->object_lock );
 604                 return;
 605             }
 606         }
 607
 608         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 609         p_item = p_obj->p_waiting->p_item;
 610         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 611         vlc_mutex_unlock( &p_obj->object_lock );
 612         if( p_item )
 613         {
 614             if( !b_fetch_art )
 615             {
 616                 input_MetaFetch( p_playlist, p_item );
 617                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 618                 /*  Fetch right now */
 619                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
 620                 {
 621                     vlc_mutex_lock( &p_obj->object_lock );
 622                     preparse_item_t p;
 623                     p.p_item = p_item;
 624                     p.b_fetch_art = VLC_TRUE;
 625                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
 626                                  p_playlist->p_fetcher->i_waiting,
 627                                  0, p );
 628                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
 629                     vlc_mutex_unlock( &p_obj->object_lock );
 630                     continue;
 631                 }
 632                 else
 633                     vlc_gc_decref( p_item );
 634             }
 635             else
 636             {
 637                 int i_ret;
 638
 639                 /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 640                  * (This can happen if we fetch art on play)
 641                  * FIXME this doesn't work if we need to fetch meta before art ... */
 642                 for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 643                 {
 644                     vlc_bool_t b_break;
 645                     PL_LOCK;
 646                     b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 647                                 p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 648                     PL_UNLOCK;
 649                     if( b_break )
 650                         break;
 651                     msleep( 50000 );
 652                 }
 653
 654                 i_ret = input_ArtFind( p_playlist, p_item );
 655                 if( i_ret == 1 )
 656                 {
 657                     PL_DEBUG("downloading art for %s", p_item->psz_name );
 658                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 659                         input_item_SetArtNotFound( p_item, VLC_TRUE );
 660                     else {
 661                         input_item_SetArtFetched( p_item, VLC_TRUE );
 662                         var_SetInteger( p_playlist, "item-change",
 663                                         p_item->i_id );
 664                     }
 665                 }
 666                 else if( i_ret == 0 ) /* Was in cache */
 667                 {
 668                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
 669                     input_item_SetArtFetched( p_item, VLC_TRUE );
 670                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
 671                 }
 672                 else
 673                 {
 674                     PL_DEBUG("art not found for %s", p_item->psz_name );
 675                     input_item_SetArtNotFound( p_item, VLC_TRUE );
 676                 }
 677                 vlc_gc_decref( p_item );
 678            }
 679         }
 680         vlc_mutex_lock( &p_obj->object_lock );
 681         i_activity = var_GetInteger( p_playlist, "activity" );
 682         if( i_activity < 0 ) i_activity = 0;
 683         vlc_mutex_unlock( &p_obj->object_lock );
 684         /* Sleep at least 1ms */
 685         msleep( (i_activity+1) * 1000 );
 686     }
 687 }
 688
 689 static void VariablesInit( playlist_t *p_playlist )
 690 {
 691     vlc_value_t val;
 692     /* These variables control updates */
 693     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 694     val.b_bool = VLC_TRUE;
 695     var_Set( p_playlist, "intf-change", val );
 696
 697     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 698     val.i_int = -1;
 699     var_Set( p_playlist, "item-change", val );
 700
 701     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 702     val.i_int = -1;
 703     var_Set( p_playlist, "item-deleted", val );
 704
 705     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 706
 707     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 708     val.i_int = -1;
 709     var_Set( p_playlist, "playlist-current", val );
 710
 711     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 712
 713     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 714     val.b_bool = VLC_TRUE;
 715     var_Set( p_playlist, "intf-show", val );
 716
 717     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 718     var_SetInteger( p_playlist, "activity", 0 );
 719
 720     /* Variables to control playback */
 721     var_CreateGetBool( p_playlist, "play-and-stop" );
 722     var_CreateGetBool( p_playlist, "play-and-exit" );
 723     var_CreateGetBool( p_playlist, "random" );
 724     var_CreateGetBool( p_playlist, "repeat" );
 725     var_CreateGetBool( p_playlist, "loop" );
 726
 727     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 728 }