Reworked/improved the way sout-keep works. (VLM sout-keep does not
[vlc.git] / src / playlist / engine.c
1 /*****************************************************************************
2  * engine.c : Run the playlist and handle its control
3  *****************************************************************************
4  * Copyright (C) 1999-2004 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 #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     ((playlist_t*)p_this)->b_reset_currently_playing = VLC_TRUE;
42     playlist_Signal( ((playlist_t*)p_this) );
43     return VLC_SUCCESS;
44 }
45
46 /**
47  * Create playlist
48  *
49  * Create a playlist structure.
50  * \param p_parent the vlc object that is to be the parent of this playlist
51  * \return a pointer to the created playlist, or NULL on error
52  */
53 playlist_t * playlist_Create( vlc_object_t *p_parent )
54 {
55     playlist_t *p_playlist;
56     vlc_bool_t b_save;
57     int i_tree;
58
59     /* Allocate structure */
60     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
61     if( !p_playlist )
62     {
63         msg_Err( p_parent, "out of memory" );
64         return NULL;
65     }
66     p_parent->p_libvlc->p_playlist = p_playlist;
67
68     VariablesInit( p_playlist );
69
70     /* Initialise data structures */
71     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
72     p_playlist->i_last_playlist_id = 0;
73     p_playlist->i_last_input_id = 0;
74     p_playlist->p_input = NULL;
75
76     p_playlist->gc_date = 0;
77     p_playlist->b_cant_sleep = VLC_FALSE;
78
79     ARRAY_INIT( p_playlist->items );
80     ARRAY_INIT( p_playlist->all_items );
81     ARRAY_INIT( p_playlist->input_items );
82     ARRAY_INIT( p_playlist->current );
83
84     p_playlist->i_current_index = 0;
85     p_playlist->b_reset_currently_playing = VLC_TRUE;
86     p_playlist->last_rebuild_date = 0;
87
88     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
89     p_playlist->b_always_tree = (i_tree == 1);
90     p_playlist->b_never_tree = (i_tree == 2);
91
92     p_playlist->b_doing_ml = VLC_FALSE;
93
94     p_playlist->b_auto_preparse =
95                         var_CreateGetBool( p_playlist, "auto-preparse") ;
96
97     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
98                                                        0 );
99     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
100                                                        0 );
101
102     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
103         return NULL;
104
105     /* Create playlist and media library */
106     p_playlist->p_local_category = playlist_NodeCreate( p_playlist,
107                               _( "Playlist" ),p_playlist->p_root_category, 0 );
108     p_playlist->p_local_onelevel =  playlist_NodeCreate( p_playlist,
109                               _( "Playlist" ), p_playlist->p_root_onelevel, 0 );
110     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
111     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
112
113     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
114         !p_playlist->p_local_category->p_input ||
115         !p_playlist->p_local_onelevel->p_input )
116         return NULL;
117
118     /* Link the nodes together. Todo: actually create them from the same input*/
119     p_playlist->p_local_onelevel->p_input->i_id =
120         p_playlist->p_local_category->p_input->i_id;
121
122     if( config_GetInt( p_playlist, "media-library") )
123     {
124         p_playlist->p_ml_category =   playlist_NodeCreate( p_playlist,
125                          _( "Media Library" ), p_playlist->p_root_category, 0 );
126         p_playlist->p_ml_onelevel =  playlist_NodeCreate( p_playlist,
127                          _( "Media Library" ), p_playlist->p_root_onelevel, 0 );
128
129         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
130             return NULL;
131
132         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
133         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
134         p_playlist->p_ml_onelevel->p_input->i_id =
135              p_playlist->p_ml_category->p_input->i_id;
136
137     }
138     else
139     {
140         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
141     }
142
143     /* Initial status */
144     p_playlist->status.p_item = NULL;
145     p_playlist->status.p_node = p_playlist->p_local_onelevel;
146     p_playlist->request.b_request = VLC_FALSE;
147     p_playlist->status.i_status = PLAYLIST_STOPPED;
148
149     p_playlist->i_sort = SORT_ID;
150     p_playlist->i_order = ORDER_NORMAL;
151
152     b_save = p_playlist->b_auto_preparse;
153     p_playlist->b_auto_preparse = VLC_FALSE;
154     playlist_MLLoad( p_playlist );
155     p_playlist->b_auto_preparse = VLC_TRUE;
156     return p_playlist;
157 }
158
159 void playlist_Destroy( playlist_t *p_playlist )
160 {
161     var_Destroy( p_playlist, "intf-change" );
162     var_Destroy( p_playlist, "item-change" );
163     var_Destroy( p_playlist, "playlist-current" );
164     var_Destroy( p_playlist, "intf-popmenu" );
165     var_Destroy( p_playlist, "intf-show" );
166     var_Destroy( p_playlist, "play-and-stop" );
167     var_Destroy( p_playlist, "play-and-exit" );
168     var_Destroy( p_playlist, "random" );
169     var_Destroy( p_playlist, "repeat" );
170     var_Destroy( p_playlist, "loop" );
171     var_Destroy( p_playlist, "activity" );
172
173     vlc_mutex_destroy( &p_playlist->gc_lock );
174     vlc_object_detach( p_playlist );
175     vlc_object_destroy( p_playlist );
176 }
177
178 /* Destroy remaining objects */
179 static void ObjectGarbageCollector( playlist_t *p_playlist )
180 {
181     vlc_object_t *p_obj;
182
183     if( mdate() - p_playlist->gc_date < 1000000 )
184     {
185         p_playlist->b_cant_sleep = VLC_TRUE;
186         return;
187     }
188     else if( p_playlist->gc_date == 0 )
189         return;
190
191     vlc_mutex_lock( &p_playlist->gc_lock );
192     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_VOUT,
193                                                   FIND_CHILD ) ) )
194     {
195         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
196         {
197             vlc_object_release( p_obj );
198             break;
199         }
200         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
201         vlc_object_detach( p_obj );
202         vlc_object_release( p_obj );
203         vout_Destroy( (vout_thread_t *)p_obj );
204     }
205     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
206                                                   FIND_CHILD ) ) )
207     {
208         if( p_obj->p_parent != (vlc_object_t*)p_playlist )
209         {
210             vlc_object_release( p_obj );
211             break;
212         }
213         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
214         vlc_object_detach( p_obj );
215         vlc_object_release( p_obj );
216         sout_DeleteInstance( (sout_instance_t*)p_obj );
217     }
218     p_playlist->b_cant_sleep = VLC_FALSE;
219     vlc_mutex_unlock( &p_playlist->gc_lock );
220 }
221
222 /** Main loop for the playlist */
223 void playlist_MainLoop( playlist_t *p_playlist )
224 {
225     playlist_item_t *p_item = NULL;
226     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
227     PL_LOCK;
228
229     if( p_playlist->b_reset_currently_playing &&
230         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
231     {
232         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
233                              p_playlist->status.p_item );
234         p_playlist->last_rebuild_date = mdate();
235     }
236
237 check_input:
238     /* If there is an input, check that it doesn't need to die. */
239     if( p_playlist->p_input )
240     {
241         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
242         {
243             PL_DEBUG( "incoming request - stopping current input" );
244             input_StopThread( p_playlist->p_input );
245         }
246
247         /* This input is dead. Remove it ! */
248         if( p_playlist->p_input->b_dead )
249         {
250             int i_activity;
251             input_thread_t *p_input;
252             PL_DEBUG( "dead input" );
253
254             p_input = p_playlist->p_input;
255             p_playlist->p_input = NULL;
256
257             /* Release the playlist lock, because we may get stuck
258              * in input_DestroyThread() for some time. */
259             PL_UNLOCK
260
261             /* Destroy input */
262             input_DestroyThread( p_input );
263
264             PL_LOCK;
265
266             p_playlist->gc_date = mdate();
267             p_playlist->b_cant_sleep = VLC_TRUE;
268
269             if( p_playlist->status.p_item->i_flags
270                 & PLAYLIST_REMOVE_FLAG )
271             {
272                  PL_DEBUG( "%s was marked for deletion, deleting",
273                                  PLI_NAME( p_playlist->status.p_item  ) );
274                  playlist_ItemDelete( p_playlist->status.p_item );
275                  if( p_playlist->request.p_item == p_playlist->status.p_item )
276                      p_playlist->request.p_item = NULL;
277                  p_playlist->status.p_item = NULL;
278             }
279
280             i_activity= var_GetInteger( p_playlist, "activity") ;
281             var_SetInteger( p_playlist, "activity", i_activity -
282                             DEFAULT_INPUT_ACTIVITY );
283             goto check_input;
284         }
285         /* This input is dying, let it do */
286         else if( p_playlist->p_input->b_die )
287         {
288             PL_DEBUG( "dying input" );
289             PL_UNLOCK;
290             msleep( 25000 ); // 25 ms
291             PL_LOCK;
292             goto check_input;
293         }
294         /* This input has finished, ask it to die ! */
295         else if( p_playlist->p_input->b_error
296                   || p_playlist->p_input->b_eof )
297         {
298             PL_DEBUG( "finished input" );
299             input_StopThread( p_playlist->p_input );
300             /* No need to wait here, we'll wait in the p_input->b_die case */
301             goto check_input;
302         }
303         else if( p_playlist->p_input->i_state != INIT_S )
304         {
305             PL_UNLOCK;
306             ObjectGarbageCollector( p_playlist );
307             PL_LOCK;
308         }
309     }
310     else
311     {
312         /* No input. Several cases
313          *  - No request, running status -> start new item
314          *  - No request, stopped status -> collect garbage
315          *  - Request, running requested -> start new item
316          *  - Request, stopped requested -> collect garbage
317          */
318          if( (!p_playlist->request.b_request &&
319               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
320               ( p_playlist->request.b_request &&
321                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
322          {
323              msg_Dbg( p_playlist, "starting new item" );
324              p_item = playlist_NextItem( p_playlist );
325
326              if( p_item == NULL )
327              {
328                 msg_Dbg( p_playlist, "nothing to play" );
329                 if( b_playexit == VLC_TRUE )
330                 {
331                     msg_Info( p_playlist, "end of playlist, exiting" );
332                     p_playlist->p_libvlc->b_die = VLC_TRUE;
333                 }
334                 p_playlist->status.i_status = PLAYLIST_STOPPED;
335                 PL_UNLOCK
336                 return;
337              }
338              playlist_PlayItem( p_playlist, p_item );
339          }
340          else
341          {
342             p_playlist->status.i_status = PLAYLIST_STOPPED;
343             if( p_playlist->status.p_item &&
344                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
345             {
346                 PL_DEBUG( "deleting item marked for deletion" );
347                 playlist_ItemDelete( p_playlist->status.p_item );
348                 p_playlist->status.p_item = NULL;
349             }
350
351             /* Collect garbage */
352             PL_UNLOCK;
353             ObjectGarbageCollector( p_playlist );
354             PL_LOCK;
355         }
356     }
357     PL_UNLOCK
358 }
359
360 /** Playlist dying last loop */
361 void playlist_LastLoop( playlist_t *p_playlist )
362 {
363     vlc_object_t *p_obj;
364
365     /* If there is an input, kill it */
366     while( 1 )
367     {
368         PL_LOCK
369
370         if( p_playlist->p_input == NULL )
371         {
372             PL_UNLOCK
373             break;
374         }
375
376         if( p_playlist->p_input->b_dead )
377         {
378             input_thread_t *p_input;
379
380             /* Unlink current input */
381             p_input = p_playlist->p_input;
382             p_playlist->p_input = NULL;
383             PL_UNLOCK
384
385             /* Destroy input */
386             input_DestroyThread( p_input );
387             continue;
388         }
389         else if( p_playlist->p_input->b_die )
390         {
391             /* This input is dying, leave it alone */
392             ;
393         }
394         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
395         {
396             input_StopThread( p_playlist->p_input );
397             PL_UNLOCK
398             continue;
399         }
400         else
401         {
402             p_playlist->p_input->b_eof = 1;
403         }
404
405         PL_UNLOCK
406
407         msleep( INTF_IDLE_SLEEP );
408     }
409
410     /* close all remaining sout */
411     while( ( p_obj = vlc_object_find( p_playlist,
412                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
413     {
414         vlc_object_detach( p_obj );
415         vlc_object_release( p_obj );
416         sout_DeleteInstance( (sout_instance_t*)p_obj );
417     }
418
419     /* close all remaining vout */
420     while( ( p_obj = vlc_object_find( p_playlist,
421                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
422     {
423         vlc_object_detach( p_obj );
424         vlc_object_release( p_obj );
425         vout_Destroy( (vout_thread_t *)p_obj );
426     }
427
428     while( p_playlist->i_sds )
429     {
430         playlist_ServicesDiscoveryRemove( p_playlist,
431                                           p_playlist->pp_sds[0]->psz_module );
432     }
433
434     playlist_MLDump( p_playlist );
435
436     PL_LOCK;
437     /* Go through all items, and simply free everything without caring
438      * about the tree structure. Do not decref, it will be done by doing
439      * the same thing on the input items array */
440     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
441         free( p_del->pp_children );
442         free( p_del );
443     FOREACH_END();
444     ARRAY_RESET( p_playlist->all_items );
445
446     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
447         input_ItemClean( p_del );
448         free( p_del );
449     FOREACH_END();
450     ARRAY_RESET( p_playlist->input_items );
451
452     ARRAY_RESET( p_playlist->items );
453     ARRAY_RESET( p_playlist->current );
454
455     PL_UNLOCK;
456 }
457
458 /** Main loop for preparser queue */
459 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
460 {
461     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
462     input_item_t *p_current;
463     int i_activity;
464     uint32_t i_m, i_o;
465
466     while( !p_playlist->b_die )
467     {
468         vlc_mutex_lock( &p_obj->object_lock );
469         while( p_obj->i_waiting == 0 )
470         {
471             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
472             if( p_playlist->b_die )
473             {
474                 vlc_mutex_unlock( &p_obj->object_lock );
475                 return;
476             }
477         }
478
479         p_current = p_obj->pp_waiting[0];
480         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
481         vlc_mutex_unlock( &p_obj->object_lock );
482
483         PL_LOCK;
484         if( p_current )
485         {
486             vlc_bool_t b_preparsed = VLC_FALSE;
487             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
488                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
489                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
490                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
491                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
492                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
493                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
494                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
495             {
496                 b_preparsed = VLC_TRUE;
497                 stats_TimerStart( p_playlist, "Preparse run",
498                                   STATS_TIMER_PREPARSE );
499                 PL_UNLOCK;
500                 input_Preparse( p_playlist, p_current );
501                 PL_LOCK;
502                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
503             }
504             PL_UNLOCK;
505             if( b_preparsed )
506             {
507                 p_current->p_meta->i_status |= ITEM_PREPARSED;
508                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
509             }
510             PL_LOCK;
511
512             /* If we haven't retrieved enough meta, add to secondary queue
513              * which will run the "meta fetchers".
514              * This only checks for meta, not for art
515              * \todo don't do this for things we won't get meta for, like vids
516              */
517             if( p_current->p_meta &&
518                 !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
519             {
520                 preparse_item_t p;
521                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
522                 p.p_item = p_current;
523                 p.b_fetch_art = VLC_FALSE;
524                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
525                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
526                              p_playlist->p_fetcher->i_waiting,
527                              p_playlist->p_fetcher->i_waiting, p);
528                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
529                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
530             }
531             /* We already have all needed meta, but we need art right now */
532             else if( p_current->p_meta &&
533                      p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
534                      EMPTY_STR( p_current->p_meta->psz_arturl ) )
535             {
536                 preparse_item_t p;
537                 PL_DEBUG("meta ok for %s, need to fetch art",
538                                                          p_current->psz_name );
539                 p.p_item = p_current;
540                 p.b_fetch_art = VLC_TRUE;
541                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
542                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
543                              p_playlist->p_fetcher->i_waiting,
544                              p_playlist->p_fetcher->i_waiting, p);
545                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
546                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
547             }
548             else
549             {
550                 PL_DEBUG( "no fetch required for %s (art currently %s)",
551                           p_current->psz_name,
552                           p_current->p_meta ? p_current->p_meta->psz_arturl:
553                                               "null" );
554                 vlc_gc_decref( p_current );
555             }
556             PL_UNLOCK;
557         }
558         else
559             PL_UNLOCK;
560
561         vlc_mutex_lock( &p_obj->object_lock );
562         i_activity = var_GetInteger( p_playlist, "activity" );
563         if( i_activity < 0 ) i_activity = 0;
564         vlc_mutex_unlock( &p_obj->object_lock );
565         /* Sleep at least 1ms */
566         msleep( (i_activity+1) * 1000 );
567     }
568 }
569
570 /** Main loop for secondary preparser queue */
571 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
572 {
573     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
574     vlc_bool_t b_fetch_art;
575     input_item_t *p_item;
576     int i_activity;
577
578     while( !p_playlist->b_die )
579     {
580         vlc_mutex_lock( &p_obj->object_lock );
581         while( p_obj->i_waiting == 0 )
582         {
583             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
584             if( p_playlist->b_die )
585             {
586                 vlc_mutex_unlock( &p_obj->object_lock );
587                 return;
588             }
589         }
590
591         b_fetch_art = p_obj->p_waiting->b_fetch_art;
592         p_item = p_obj->p_waiting->p_item;
593         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
594         vlc_mutex_unlock( &p_obj->object_lock );
595         if( p_item )
596         {
597             assert( p_item->p_meta );
598             if( !b_fetch_art )
599             {
600                 input_MetaFetch( p_playlist, p_item );
601                 p_item->p_meta->i_status |= ITEM_META_FETCHED;
602                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
603                 /*  Fetch right now */
604                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
605                 {
606                     vlc_mutex_lock( &p_obj->object_lock );
607                     preparse_item_t p;
608                     p.p_item = p_item;
609                     p.b_fetch_art = VLC_TRUE;
610                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
611                                  p_playlist->p_fetcher->i_waiting,
612                                  0, p );
613                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
614                     vlc_mutex_unlock( &p_obj->object_lock );
615                     continue;
616                 }
617                 else
618                     vlc_gc_decref( p_item );
619             }
620             else
621             {
622                 int i_ret = input_ArtFind( p_playlist, p_item );
623                 if( i_ret == 1 )
624                 {
625                     PL_DEBUG("downloading art for %s", p_item->psz_name );
626                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
627                         p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
628                     else {
629                         p_item->p_meta->i_status |= ITEM_ART_FETCHED;
630                         var_SetInteger( p_playlist, "item-change",
631                                         p_item->i_id );
632                     }
633                 }
634                 else if( i_ret == 0 ) /* Was in cache */
635                 {
636                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
637                     p_item->p_meta->i_status |= ITEM_ART_FETCHED;
638                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
639                 }
640                 else
641                 {
642                     PL_DEBUG("art not found for %s", p_item->psz_name );
643                     p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
644                 }
645                 vlc_gc_decref( p_item );
646            }
647         }
648         vlc_mutex_lock( &p_obj->object_lock );
649         i_activity = var_GetInteger( p_playlist, "activity" );
650         if( i_activity < 0 ) i_activity = 0;
651         vlc_mutex_unlock( &p_obj->object_lock );
652         /* Sleep at least 1ms */
653         msleep( (i_activity+1) * 1000 );
654     }
655 }
656
657 static void VariablesInit( playlist_t *p_playlist )
658 {
659     vlc_value_t val;
660     /* These variables control updates */
661     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
662     val.b_bool = VLC_TRUE;
663     var_Set( p_playlist, "intf-change", val );
664
665     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
666     val.i_int = -1;
667     var_Set( p_playlist, "item-change", val );
668
669     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
670     val.i_int = -1;
671     var_Set( p_playlist, "item-deleted", val );
672
673     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
674
675     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
676     val.i_int = -1;
677     var_Set( p_playlist, "playlist-current", val );
678
679     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
680
681     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
682     val.b_bool = VLC_TRUE;
683     var_Set( p_playlist, "intf-show", val );
684
685     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
686     var_SetInteger( p_playlist, "activity", 0 );
687
688     /* Variables to control playback */
689     var_CreateGetBool( p_playlist, "play-and-stop" );
690     var_CreateGetBool( p_playlist, "play-and-exit" );
691     var_CreateGetBool( p_playlist, "random" );
692     var_CreateGetBool( p_playlist, "repeat" );
693     var_CreateGetBool( p_playlist, "loop" );
694
695     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
696 }