playlist: rename ML_decref() to recursively_decref(). Please give useful name to...
[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 static void recursively_decref( playlist_item_t *p_node )
400 {
401     vlc_gc_decref( p_node->p_input );
402
403     int i;
404     if( p_node->i_children > 0 )
405         for( i = 0 ; i < p_node->i_children ; i++ )
406             recursively_decref( p_node->pp_children[i] );
407 }
408
409 /**
410  * Last loop
411  *
412  * The playlist is dying so do the last loop
413  * \param p_playlist the playlist object
414  * \return nothing
415 */
416 void playlist_LastLoop( playlist_t *p_playlist )
417 {
418     vlc_object_t *p_obj;
419
420     /* If there is an input, kill it */
421     while( 1 )
422     {
423         PL_LOCK;
424         if( p_playlist->p_input == NULL )
425         {
426             PL_UNLOCK;
427             break;
428         }
429
430         if( p_playlist->p_input->b_dead )
431         {
432             input_thread_t *p_input;
433
434             /* Unlink current input */
435             p_input = p_playlist->p_input;
436             p_playlist->p_input = NULL;
437             PL_UNLOCK;
438
439             /* Destroy input */
440             vlc_object_release( p_input );
441             continue;
442         }
443         else if( p_playlist->p_input->b_die )
444         {
445             /* This input is dying, leave it alone */
446             ;
447         }
448         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
449         {
450             input_StopThread( p_playlist->p_input );
451             PL_UNLOCK;
452             continue;
453         }
454         else
455         {
456             p_playlist->p_input->b_eof = 1;
457         }
458         PL_UNLOCK;
459
460         msleep( INTF_IDLE_SLEEP );
461     }
462
463     /* close all remaining sout */
464     while( ( p_obj = vlc_object_find( p_playlist,
465                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
466     {
467         vlc_object_detach( p_obj );
468         vlc_object_release( p_obj );
469         sout_DeleteInstance( (sout_instance_t*)p_obj );
470     }
471
472     /* close all remaining vout */
473     while( ( p_obj = vlc_object_find( p_playlist,
474                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
475     {
476         vlc_object_detach( p_obj );
477         vlc_object_release( p_obj );
478         vout_Destroy( (vout_thread_t *)p_obj );
479     }
480
481     while( p_playlist->i_sds )
482     {
483         playlist_ServicesDiscoveryRemove( p_playlist,
484                                           p_playlist->pp_sds[0]->p_sd->psz_module );
485     }
486
487     playlist_MLDump( p_playlist );
488     /* We don't need the media library anymore */
489
490     /* Because this nasty recursive function decreases the
491      * p_playlist->p_ml_category refcount, it may get deleted.
492      * However we will delete the p_playlist->p_ml_category in the
493      * following FOREACH. */
494     vlc_gc_incref( p_playlist->p_ml_category );
495
496     /* Decref all subitems, and the given items */
497     recursively_decref( p_playlist->p_ml_category );
498
499     PL_LOCK;
500     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
501         free( p_del->pp_children );
502         vlc_gc_decref( p_del->p_input );
503         free( p_del );
504     FOREACH_END();
505     ARRAY_RESET( p_playlist->all_items );
506
507     ARRAY_RESET( p_playlist->items );
508     ARRAY_RESET( p_playlist->current );
509
510     PL_UNLOCK;
511 }
512
513 /**
514  * Preparse loop
515  *
516  * Main loop for preparser queue
517  * \param p_obj items to preparse
518  * \return nothing
519  */
520 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
521 {
522     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
523     input_item_t *p_current;
524     int i_activity;
525     uint32_t i_m, i_o;
526
527     while( !p_playlist->b_die )
528     {
529         vlc_object_lock( p_obj );
530         while( p_obj->i_waiting == 0 )
531         {
532             if( vlc_object_wait( p_obj ) || p_playlist->b_die )
533             {
534                 vlc_object_unlock( p_obj );
535                 return;
536             }
537         }
538
539         p_current = p_obj->pp_waiting[0];
540         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
541         vlc_object_unlock( p_obj );
542
543         PL_LOCK;
544         if( p_current )
545         {
546             if( p_current->i_type == ITEM_TYPE_FILE )
547             {
548                 stats_TimerStart( p_playlist, "Preparse run",
549                                   STATS_TIMER_PREPARSE );
550                 /* Do not preparse if it is already done (like by playing it) */
551                 if( !input_item_IsPreparsed( p_current ) )
552                 {
553                     PL_UNLOCK;
554                     input_Preparse( p_playlist, p_current );
555                     PL_LOCK;
556                 }
557                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
558                 PL_UNLOCK;
559                 input_item_SetPreparsed( p_current, VLC_TRUE );
560                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
561                 PL_LOCK;
562             }
563             /* If we haven't retrieved enough meta, add to secondary queue
564              * which will run the "meta fetchers".
565              * This only checks for meta, not for art
566              * \todo don't do this for things we won't get meta for, like vids
567              */
568             char *psz_arturl = input_item_GetArtURL( p_current );
569             char *psz_name = input_item_GetName( p_current );
570             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
571             {
572                 preparse_item_t p;
573                 PL_DEBUG( "need to fetch meta for %s", p_current->psz_name );
574                 p.p_item = p_current;
575                 p.b_fetch_art = VLC_FALSE;
576                 vlc_object_lock( p_playlist->p_fetcher );
577                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
578                              p_playlist->p_fetcher->i_waiting,
579                              p_playlist->p_fetcher->i_waiting, p);
580                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
581                 vlc_object_unlock( p_playlist->p_fetcher );
582             }
583             /* We already have all needed meta, but we need art right now */
584             else if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
585                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
586             {
587                 preparse_item_t p;
588                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
589                 p.p_item = p_current;
590                 p.b_fetch_art = VLC_TRUE;
591                 vlc_object_lock( p_playlist->p_fetcher );
592                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
593                              p_playlist->p_fetcher->i_waiting,
594                              p_playlist->p_fetcher->i_waiting, p);
595                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
596                 vlc_object_unlock( p_playlist->p_fetcher );
597             }
598             else
599             {
600                 PL_DEBUG( "no fetch required for %s (art currently %s)",
601                           psz_name, psz_arturl );
602                 vlc_gc_decref( p_current );
603             }
604             free( psz_name );
605             free( psz_arturl );
606             PL_UNLOCK;
607         }
608         else
609             PL_UNLOCK;
610
611         vlc_object_lock( p_obj );
612         i_activity = var_GetInteger( p_playlist, "activity" );
613         if( i_activity < 0 ) i_activity = 0;
614         vlc_object_unlock( p_obj );
615         /* Sleep at least 1ms */
616         msleep( (i_activity+1) * 1000 );
617     }
618 }
619
620 /**
621  * Fetcher loop
622  *
623  * Main loop for secondary preparser queue
624  * \param p_obj items to preparse
625  * \return nothing
626  */
627 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
628 {
629     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
630     vlc_bool_t b_fetch_art;
631     input_item_t *p_item;
632     int i_activity;
633
634     while( !p_playlist->b_die )
635     {
636         vlc_mutex_lock( &p_obj->object_lock );
637         while( p_obj->i_waiting == 0 )
638         {
639             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
640             if( p_playlist->b_die )
641             {
642                 vlc_mutex_unlock( &p_obj->object_lock );
643                 return;
644             }
645         }
646
647         b_fetch_art = p_obj->p_waiting->b_fetch_art;
648         p_item = p_obj->p_waiting->p_item;
649         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
650         vlc_mutex_unlock( &p_obj->object_lock );
651         if( p_item )
652         {
653             if( !b_fetch_art )
654             {
655                 /* If the user doesn't want us to fetch meta automatically
656                  * abort here. */
657                 if( p_playlist->p_fetcher->b_fetch_meta )
658                 {
659                     input_MetaFetch( p_playlist, p_item );
660                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
661                 }
662
663                 /*  Fetch right now */
664                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
665                 {
666                     vlc_mutex_lock( &p_obj->object_lock );
667                     preparse_item_t p;
668                     p.p_item = p_item;
669                     p.b_fetch_art = VLC_TRUE;
670                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
671                                  p_playlist->p_fetcher->i_waiting,
672                                  0, p );
673                     PL_DEBUG( "meta fetched for %s, get art", p_item->psz_name );
674                     vlc_mutex_unlock( &p_obj->object_lock );
675                     continue;
676                 }
677                 else
678                     vlc_gc_decref( p_item );
679             }
680             else
681             {
682                 int i_ret;
683
684                 /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
685                  * (This can happen if we fetch art on play)
686                  * FIXME this doesn't work if we need to fetch meta before art ... */
687                 for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
688                 {
689                     vlc_bool_t b_break;
690                     PL_LOCK;
691                     b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
692                                 p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
693                     PL_UNLOCK;
694                     if( b_break )
695                         break;
696                     msleep( 50000 );
697                 }
698
699                 i_ret = input_ArtFind( p_playlist, p_item );
700                 if( i_ret == 1 )
701                 {
702                     PL_DEBUG( "downloading art for %s", p_item->psz_name );
703                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
704                         input_item_SetArtNotFound( p_item, VLC_TRUE );
705                     else {
706                         input_item_SetArtFetched( p_item, VLC_TRUE );
707                         var_SetInteger( p_playlist, "item-change",
708                                         p_item->i_id );
709                     }
710                 }
711                 else if( i_ret == 0 ) /* Was in cache */
712                 {
713                     PL_DEBUG( "found art for %s in cache", p_item->psz_name );
714                     input_item_SetArtFetched( p_item, VLC_TRUE );
715                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
716                 }
717                 else
718                 {
719                     PL_DEBUG( "art not found for %s", p_item->psz_name );
720                     input_item_SetArtNotFound( p_item, VLC_TRUE );
721                 }
722                 vlc_gc_decref( p_item );
723            }
724         }
725         vlc_object_lock( p_obj );
726         i_activity = var_GetInteger( p_playlist, "activity" );
727         if( i_activity < 0 ) i_activity = 0;
728         vlc_object_unlock( p_obj );
729         /* Sleep at least 1ms */
730         msleep( (i_activity+1) * 1000 );
731     }
732 }
733
734 static void VariablesInit( playlist_t *p_playlist )
735 {
736     vlc_value_t val;
737     /* These variables control updates */
738     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
739     val.b_bool = VLC_TRUE;
740     var_Set( p_playlist, "intf-change", val );
741
742     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
743     val.i_int = -1;
744     var_Set( p_playlist, "item-change", val );
745
746     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
747     val.i_int = -1;
748     var_Set( p_playlist, "item-deleted", val );
749
750     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
751
752     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
753     val.i_int = -1;
754     var_Set( p_playlist, "playlist-current", val );
755
756     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
757
758     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
759     val.b_bool = VLC_TRUE;
760     var_Set( p_playlist, "intf-show", val );
761
762     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
763     var_SetInteger( p_playlist, "activity", 0 );
764
765     /* Variables to control playback */
766     var_CreateGetBool( p_playlist, "play-and-stop" );
767     var_CreateGetBool( p_playlist, "play-and-exit" );
768     var_CreateGetBool( p_playlist, "random" );
769     var_CreateGetBool( p_playlist, "repeat" );
770     var_CreateGetBool( p_playlist, "loop" );
771
772     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
773 }