Remove hack : input items are now correctly dereferenced in the xspf demux
[vlc.git] / 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  *          ClĂ©ment 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     static const char playlist_name[] = "playlist";
63     playlist_t *p_playlist;
64     vlc_bool_t b_save;
65     int i_tree;
66
67     /* Allocate structure */
68     p_playlist = vlc_custom_create( p_parent, sizeof( *p_playlist ),
69                                     VLC_OBJECT_PLAYLIST, playlist_name );
70     if( !p_playlist )
71     {
72         msg_Err( p_parent, "out of memory" );
73         return NULL;
74     }
75
76     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
77
78     p_parent->p_libvlc->p_playlist = p_playlist;
79
80     VariablesInit( p_playlist );
81
82     /* Initialise data structures */
83     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
84     p_playlist->i_last_playlist_id = 0;
85     p_playlist->p_input = NULL;
86
87     p_playlist->gc_date = 0;
88     p_playlist->b_cant_sleep = VLC_FALSE;
89
90     ARRAY_INIT( p_playlist->items );
91     ARRAY_INIT( p_playlist->all_items );
92     ARRAY_INIT( p_playlist->current );
93
94     p_playlist->i_current_index = 0;
95     p_playlist->b_reset_currently_playing = VLC_TRUE;
96     p_playlist->last_rebuild_date = 0;
97
98     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
99     p_playlist->b_always_tree = (i_tree == 1);
100     p_playlist->b_never_tree = (i_tree == 2);
101
102     p_playlist->b_doing_ml = VLC_FALSE;
103
104     p_playlist->b_auto_preparse =
105                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
106
107     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
108                                     0, NULL );
109     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
110                                     0, p_playlist->p_root_category->p_input );
111
112     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
113         return NULL;
114
115     /* Create playlist and media library */
116     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
117                             &p_playlist->p_local_category,
118                             &p_playlist->p_local_onelevel, VLC_FALSE );
119
120     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
121     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
122
123     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
124         !p_playlist->p_local_category->p_input ||
125         !p_playlist->p_local_onelevel->p_input )
126         return NULL;
127
128     if( config_GetInt( p_playlist, "media-library") )
129     {
130         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
131                             &p_playlist->p_ml_category,
132                             &p_playlist->p_ml_onelevel, VLC_FALSE );
133
134         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
135             return NULL;
136
137         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
138         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
139     }
140     else
141     {
142         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
143     }
144
145     /* Initial status */
146     p_playlist->status.p_item = NULL;
147     p_playlist->status.p_node = p_playlist->p_local_onelevel;
148     p_playlist->request.b_request = VLC_FALSE;
149     p_playlist->status.i_status = PLAYLIST_STOPPED;
150
151     p_playlist->i_sort = SORT_ID;
152     p_playlist->i_order = ORDER_NORMAL;
153
154
155     b_save = p_playlist->b_auto_preparse;
156     p_playlist->b_auto_preparse = VLC_FALSE;
157     playlist_MLLoad( p_playlist );
158     p_playlist->b_auto_preparse = VLC_TRUE;
159
160     vlc_object_set_destructor( p_playlist, playlist_Destructor );
161
162     return p_playlist;
163 }
164
165 /**
166  * Destroy playlist
167  *
168  * Destroy a playlist structure.
169  * \param p_playlist the playlist object
170  * \return nothing
171  */
172 void playlist_Destroy( playlist_t *p_playlist )
173 {
174     /* XXX: should go in the playlist destructor */
175     var_Destroy( p_playlist, "intf-change" );
176     var_Destroy( p_playlist, "item-change" );
177     var_Destroy( p_playlist, "playlist-current" );
178     var_Destroy( p_playlist, "intf-popupmenu" );
179     var_Destroy( p_playlist, "intf-show" );
180     var_Destroy( p_playlist, "play-and-stop" );
181     var_Destroy( p_playlist, "play-and-exit" );
182     var_Destroy( p_playlist, "random" );
183     var_Destroy( p_playlist, "repeat" );
184     var_Destroy( p_playlist, "loop" );
185     var_Destroy( p_playlist, "activity" );
186
187     vlc_object_release( p_playlist );
188 }
189
190 static void playlist_Destructor( vlc_object_t * p_this )
191 {
192     playlist_t * p_playlist = (playlist_t *)p_this;
193
194     // Kill preparser
195     if( p_playlist->p_preparse )
196     {
197         vlc_object_release( p_playlist->p_preparse );
198     }
199
200     // Kill meta fetcher
201     if( p_playlist->p_fetcher )
202     {
203         vlc_object_release( p_playlist->p_fetcher );
204     }
205 }
206
207 /* Destroy remaining objects */
208 static void ObjectGarbageCollector( playlist_t *p_playlist, vlc_bool_t b_force )
209 {
210     vlc_object_t *p_obj;
211
212     if( !b_force )
213     {
214         if( mdate() - p_playlist->gc_date < 1000000 )
215         {
216             p_playlist->b_cant_sleep = VLC_TRUE;
217             return;
218         }
219         else if( p_playlist->gc_date == 0 )
220             return;
221     }
222
223     vlc_mutex_lock( &p_playlist->gc_lock );
224     while( ( p_obj = vlc_object_find( p_playlist->p_libvlc, VLC_OBJECT_VOUT,
225                                                   FIND_CHILD ) ) )
226     {
227         if( p_obj->p_parent != VLC_OBJECT(p_playlist->p_libvlc) )
228         {
229             vlc_object_release( p_obj );
230             break;
231         }
232         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
233         vlc_object_detach( p_obj );
234         vlc_object_release( p_obj );
235         vout_Destroy( (vout_thread_t *)p_obj );
236     }
237     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
238                                                   FIND_CHILD ) ) )
239     {
240         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
241         {
242             vlc_object_release( p_obj );
243             break;
244         }
245         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
246         vlc_object_detach( p_obj );
247         vlc_object_release( p_obj );
248         sout_DeleteInstance( (sout_instance_t*)p_obj );
249     }
250     p_playlist->b_cant_sleep = VLC_FALSE;
251     vlc_mutex_unlock( &p_playlist->gc_lock );
252 }
253
254 /**
255  * Main loop
256  *
257  * Main loop for the playlist
258  * \param p_playlist the playlist object
259  * \return nothing
260  */
261 void playlist_MainLoop( playlist_t *p_playlist )
262 {
263     playlist_item_t *p_item = NULL;
264     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
265     PL_LOCK;
266
267     if( p_playlist->b_reset_currently_playing &&
268         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
269     {
270         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
271                              p_playlist->status.p_item );
272         p_playlist->last_rebuild_date = mdate();
273     }
274
275 check_input:
276     /* If there is an input, check that it doesn't need to die. */
277     if( p_playlist->p_input )
278     {
279         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
280         {
281             PL_DEBUG( "incoming request - stopping current input" );
282             input_StopThread( p_playlist->p_input );
283         }
284
285         /* This input is dead. Remove it ! */
286         if( p_playlist->p_input->b_dead )
287         {
288             int i_activity;
289             input_thread_t *p_input;
290             PL_DEBUG( "dead input" );
291
292             p_input = p_playlist->p_input;
293             p_playlist->p_input = NULL;
294
295             /* Release the playlist lock, because we may get stuck
296              * in vlc_object_release() for some time. */
297             PL_UNLOCK;
298
299             /* Destroy input */
300             vlc_object_release( p_input );
301
302             PL_LOCK;
303
304             p_playlist->gc_date = mdate();
305             p_playlist->b_cant_sleep = VLC_TRUE;
306
307             if( p_playlist->status.p_item->i_flags
308                 & PLAYLIST_REMOVE_FLAG )
309             {
310                  PL_DEBUG( "%s was marked for deletion, deleting",
311                                  PLI_NAME( p_playlist->status.p_item  ) );
312                  playlist_ItemDelete( p_playlist->status.p_item );
313                  if( p_playlist->request.p_item == p_playlist->status.p_item )
314                      p_playlist->request.p_item = NULL;
315                  p_playlist->status.p_item = NULL;
316             }
317
318             i_activity= var_GetInteger( p_playlist, "activity" );
319             var_SetInteger( p_playlist, "activity", i_activity -
320                             DEFAULT_INPUT_ACTIVITY );
321             goto check_input;
322         }
323         /* This input is dying, let it do */
324         else if( p_playlist->p_input->b_die )
325         {
326             PL_DEBUG( "dying input" );
327             PL_UNLOCK;
328             msleep( INTF_IDLE_SLEEP );
329             PL_LOCK;
330             goto check_input;
331         }
332         /* This input has finished, ask it to die ! */
333         else if( p_playlist->p_input->b_error
334                   || p_playlist->p_input->b_eof )
335         {
336             PL_DEBUG( "finished input" );
337             input_StopThread( p_playlist->p_input );
338             /* No need to wait here, we'll wait in the p_input->b_die case */
339             goto check_input;
340         }
341         else if( p_playlist->p_input->i_state != INIT_S )
342         {
343             PL_UNLOCK;
344             ObjectGarbageCollector( p_playlist, VLC_FALSE );
345             PL_LOCK;
346         }
347     }
348     else
349     {
350         /* No input. Several cases
351          *  - No request, running status -> start new item
352          *  - No request, stopped status -> collect garbage
353          *  - Request, running requested -> start new item
354          *  - Request, stopped requested -> collect garbage
355         */
356         if( p_playlist->request.i_status != PLAYLIST_STOPPED )
357         {
358             msg_Dbg( p_playlist, "starting new item" );
359             p_item = playlist_NextItem( p_playlist );
360
361             if( p_item == NULL )
362             {
363                 msg_Dbg( p_playlist, "nothing to play" );
364                 p_playlist->status.i_status = PLAYLIST_STOPPED;
365                 PL_UNLOCK;
366
367                 if( b_playexit == VLC_TRUE )
368                 {
369                     msg_Info( p_playlist, "end of playlist, exiting" );
370                     vlc_object_kill( p_playlist->p_libvlc );
371                 }
372                 ObjectGarbageCollector( p_playlist, VLC_TRUE );
373                 return;
374              }
375              playlist_PlayItem( p_playlist, p_item );
376          }
377          else
378          {
379             const vlc_bool_t b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
380
381             p_playlist->status.i_status = PLAYLIST_STOPPED;
382             if( p_playlist->status.p_item &&
383                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
384             {
385                 PL_DEBUG( "deleting item marked for deletion" );
386                 playlist_ItemDelete( p_playlist->status.p_item );
387                 p_playlist->status.p_item = NULL;
388             }
389
390             /* Collect garbage */
391             PL_UNLOCK;
392             ObjectGarbageCollector( p_playlist, b_gc_forced );
393             PL_LOCK;
394         }
395     }
396     PL_UNLOCK;
397 }
398
399 /**
400  * Last loop
401  *
402  * The playlist is dying so do the last loop
403  * \param p_playlist the playlist object
404  * \return nothing
405 */
406 void playlist_LastLoop( playlist_t *p_playlist )
407 {
408     vlc_object_t *p_obj;
409
410     /* If there is an input, kill it */
411     while( 1 )
412     {
413         PL_LOCK;
414         if( p_playlist->p_input == NULL )
415         {
416             PL_UNLOCK;
417             break;
418         }
419
420         if( p_playlist->p_input->b_dead )
421         {
422             input_thread_t *p_input;
423
424             /* Unlink current input */
425             p_input = p_playlist->p_input;
426             p_playlist->p_input = NULL;
427             PL_UNLOCK;
428
429             /* Destroy input */
430             vlc_object_release( p_input );
431             continue;
432         }
433         else if( p_playlist->p_input->b_die )
434         {
435             /* This input is dying, leave it alone */
436             ;
437         }
438         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
439         {
440             input_StopThread( p_playlist->p_input );
441             PL_UNLOCK;
442             continue;
443         }
444         else
445         {
446             p_playlist->p_input->b_eof = 1;
447         }
448         PL_UNLOCK;
449
450         msleep( INTF_IDLE_SLEEP );
451     }
452
453     /* close all remaining sout */
454     while( ( p_obj = vlc_object_find( p_playlist,
455                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
456     {
457         vlc_object_detach( p_obj );
458         vlc_object_release( p_obj );
459         sout_DeleteInstance( (sout_instance_t*)p_obj );
460     }
461
462     /* close all remaining vout */
463     while( ( p_obj = vlc_object_find( p_playlist,
464                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
465     {
466         vlc_object_detach( p_obj );
467         vlc_object_release( p_obj );
468         vout_Destroy( (vout_thread_t *)p_obj );
469     }
470
471     while( p_playlist->i_sds )
472     {
473         playlist_ServicesDiscoveryRemove( p_playlist,
474                                           p_playlist->pp_sds[0]->p_sd->psz_module );
475     }
476
477     playlist_MLDump( p_playlist );
478
479     PL_LOCK;
480     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
481         free( p_del->pp_children );
482         vlc_gc_decref( p_del->p_input );
483         free( p_del );
484     FOREACH_END();
485     ARRAY_RESET( p_playlist->all_items );
486
487     ARRAY_RESET( p_playlist->items );
488     ARRAY_RESET( p_playlist->current );
489
490     PL_UNLOCK;
491 }
492
493 /**
494  * Preparse loop
495  *
496  * Main loop for preparser queue
497  * \param p_obj items to preparse
498  * \return nothing
499  */
500 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
501 {
502     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
503     input_item_t *p_current;
504     int i_activity;
505     uint32_t i_m, i_o;
506
507     while( !p_playlist->b_die )
508     {
509         vlc_object_lock( p_obj );
510         while( p_obj->i_waiting == 0 )
511         {
512             if( vlc_object_wait( p_obj ) || p_playlist->b_die )
513             {
514                 vlc_object_unlock( p_obj );
515                 return;
516             }
517         }
518
519         p_current = p_obj->pp_waiting[0];
520         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
521         vlc_object_unlock( p_obj );
522
523         PL_LOCK;
524         if( p_current )
525         {
526             if( p_current->i_type == ITEM_TYPE_FILE )
527             {
528                 stats_TimerStart( p_playlist, "Preparse run",
529                                   STATS_TIMER_PREPARSE );
530                 /* Do not preparse if it is already done (like by playing it) */
531                 if( !input_item_IsPreparsed( p_current ) )
532                 {
533                     PL_UNLOCK;
534                     input_Preparse( p_playlist, p_current );
535                     PL_LOCK;
536                 }
537                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
538                 PL_UNLOCK;
539                 input_item_SetPreparsed( p_current, VLC_TRUE );
540                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
541                 PL_LOCK;
542             }
543             /* If we haven't retrieved enough meta, add to secondary queue
544              * which will run the "meta fetchers".
545              * This only checks for meta, not for art
546              * \todo don't do this for things we won't get meta for, like vids
547              */
548             char *psz_arturl = input_item_GetArtURL( p_current );
549             char *psz_name = input_item_GetName( p_current );
550             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
551             {
552                 preparse_item_t p;
553                 PL_DEBUG( "need to fetch meta for %s", p_current->psz_name );
554                 p.p_item = p_current;
555                 p.b_fetch_art = VLC_FALSE;
556                 vlc_object_lock( p_playlist->p_fetcher );
557                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
558                              p_playlist->p_fetcher->i_waiting,
559                              p_playlist->p_fetcher->i_waiting, p);
560                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
561                 vlc_object_unlock( p_playlist->p_fetcher );
562             }
563             /* We already have all needed meta, but we need art right now */
564             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
565                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
566             {
567                 preparse_item_t p;
568                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
569                 p.p_item = p_current;
570                 p.b_fetch_art = VLC_TRUE;
571                 vlc_object_lock( p_playlist->p_fetcher );
572                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
573                              p_playlist->p_fetcher->i_waiting,
574                              p_playlist->p_fetcher->i_waiting, p);
575                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
576                 vlc_object_unlock( p_playlist->p_fetcher );
577             }
578             else
579             {
580                 PL_DEBUG( "no fetch required for %s (art currently %s)",
581                           psz_name, psz_arturl );
582                 vlc_gc_decref( p_current );
583             }
584             free( psz_name );
585             free( psz_arturl );
586             PL_UNLOCK;
587         }
588         else
589             PL_UNLOCK;
590
591         vlc_object_lock( p_obj );
592         i_activity = var_GetInteger( p_playlist, "activity" );
593         if( i_activity < 0 ) i_activity = 0;
594         vlc_object_unlock( p_obj );
595         /* Sleep at least 1ms */
596         msleep( (i_activity+1) * 1000 );
597     }
598 }
599
600 /**
601  * Fetcher loop
602  *
603  * Main loop for secondary preparser queue
604  * \param p_obj items to preparse
605  * \return nothing
606  */
607 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
608 {
609     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
610     vlc_bool_t b_fetch_art;
611     input_item_t *p_item;
612     int i_activity;
613
614     while( !p_playlist->b_die )
615     {
616         vlc_mutex_lock( &p_obj->object_lock );
617         while( p_obj->i_waiting == 0 )
618         {
619             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
620             if( p_playlist->b_die )
621             {
622                 vlc_mutex_unlock( &p_obj->object_lock );
623                 return;
624             }
625         }
626
627         b_fetch_art = p_obj->p_waiting->b_fetch_art;
628         p_item = p_obj->p_waiting->p_item;
629         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
630         vlc_mutex_unlock( &p_obj->object_lock );
631         if( p_item )
632         {
633             if( !b_fetch_art )
634             {
635                 /* If the user doesn't want us to fetch meta automatically
636                  * abort here. */
637                 if( p_playlist->p_fetcher->b_fetch_meta )
638                 {
639                     input_MetaFetch( p_playlist, p_item );
640                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
641                 }
642
643                 /*  Fetch right now */
644                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
645                 {
646                     vlc_mutex_lock( &p_obj->object_lock );
647                     preparse_item_t p;
648                     p.p_item = p_item;
649                     p.b_fetch_art = VLC_TRUE;
650                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
651                                  p_playlist->p_fetcher->i_waiting,
652                                  0, p );
653                     PL_DEBUG( "meta fetched for %s, get art", p_item->psz_name );
654                     vlc_mutex_unlock( &p_obj->object_lock );
655                     continue;
656                 }
657                 else
658                     vlc_gc_decref( p_item );
659             }
660             else
661             {
662                 int i_ret;
663
664                 /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
665                  * (This can happen if we fetch art on play)
666                  * FIXME this doesn't work if we need to fetch meta before art ... */
667                 for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
668                 {
669                     vlc_bool_t b_break;
670                     PL_LOCK;
671                     b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
672                                 p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
673                     PL_UNLOCK;
674                     if( b_break )
675                         break;
676                     msleep( 50000 );
677                 }
678
679                 i_ret = input_ArtFind( p_playlist, p_item );
680                 if( i_ret == 1 )
681                 {
682                     PL_DEBUG( "downloading art for %s", p_item->psz_name );
683                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
684                         input_item_SetArtNotFound( p_item, VLC_TRUE );
685                     else {
686                         input_item_SetArtFetched( p_item, VLC_TRUE );
687                         var_SetInteger( p_playlist, "item-change",
688                                         p_item->i_id );
689                     }
690                 }
691                 else if( i_ret == 0 ) /* Was in cache */
692                 {
693                     PL_DEBUG( "found art for %s in cache", p_item->psz_name );
694                     input_item_SetArtFetched( p_item, VLC_TRUE );
695                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
696                 }
697                 else
698                 {
699                     PL_DEBUG( "art not found for %s", p_item->psz_name );
700                     input_item_SetArtNotFound( p_item, VLC_TRUE );
701                 }
702                 vlc_gc_decref( p_item );
703            }
704         }
705         vlc_object_lock( p_obj );
706         i_activity = var_GetInteger( p_playlist, "activity" );
707         if( i_activity < 0 ) i_activity = 0;
708         vlc_object_unlock( p_obj );
709         /* Sleep at least 1ms */
710         msleep( (i_activity+1) * 1000 );
711     }
712 }
713
714 static void VariablesInit( playlist_t *p_playlist )
715 {
716     vlc_value_t val;
717     /* These variables control updates */
718     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
719     val.b_bool = VLC_TRUE;
720     var_Set( p_playlist, "intf-change", val );
721
722     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
723     val.i_int = -1;
724     var_Set( p_playlist, "item-change", val );
725
726     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
727     val.i_int = -1;
728     var_Set( p_playlist, "item-deleted", val );
729
730     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
731
732     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
733     val.i_int = -1;
734     var_Set( p_playlist, "playlist-current", val );
735
736     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
737
738     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
739     val.b_bool = VLC_TRUE;
740     var_Set( p_playlist, "intf-show", val );
741
742     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
743     var_SetInteger( p_playlist, "activity", 0 );
744
745     /* Variables to control playback */
746     var_CreateGetBool( p_playlist, "play-and-stop" );
747     var_CreateGetBool( p_playlist, "play-and-exit" );
748     var_CreateGetBool( p_playlist, "random" );
749     var_CreateGetBool( p_playlist, "repeat" );
750     var_CreateGetBool( p_playlist, "loop" );
751
752     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
753 }