85bd955a7d71bc094c1431a9c6217677ee9bbd81
[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         vlc_object_release( p_obj );
214         sout_DeleteInstance( (sout_instance_t*)p_obj );
215     }
216     p_playlist->b_cant_sleep = VLC_FALSE;
217     vlc_mutex_unlock( &p_playlist->gc_lock );
218 }
219
220 /** Main loop for the playlist */
221 void playlist_MainLoop( playlist_t *p_playlist )
222 {
223     playlist_item_t *p_item = NULL;
224     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
225     PL_LOCK;
226
227     if( p_playlist->b_reset_currently_playing &&
228         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
229     {
230         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random"),
231                              p_playlist->status.p_item );
232         p_playlist->last_rebuild_date = mdate();
233     }
234
235 check_input:
236     /* If there is an input, check that it doesn't need to die. */
237     if( p_playlist->p_input )
238     {
239         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
240         {
241             PL_DEBUG( "incoming request - stopping current input" );
242             input_StopThread( p_playlist->p_input );
243         }
244
245         /* This input is dead. Remove it ! */
246         if( p_playlist->p_input->b_dead )
247         {
248             int i_activity;
249             input_thread_t *p_input;
250             PL_DEBUG( "dead input" );
251
252             p_input = p_playlist->p_input;
253             p_playlist->p_input = NULL;
254
255             /* Release the playlist lock, because we may get stuck
256              * in input_DestroyThread() for some time. */
257             PL_UNLOCK
258
259             /* Destroy input */
260             input_DestroyThread( p_input );
261
262             PL_LOCK;
263
264             p_playlist->gc_date = mdate();
265             p_playlist->b_cant_sleep = VLC_TRUE;
266
267             if( p_playlist->status.p_item->i_flags
268                 & PLAYLIST_REMOVE_FLAG )
269             {
270                  PL_DEBUG( "%s was marked for deletion, deleting",
271                                  PLI_NAME( p_playlist->status.p_item  ) );
272                  playlist_ItemDelete( p_playlist->status.p_item );
273                  if( p_playlist->request.p_item == p_playlist->status.p_item )
274                      p_playlist->request.p_item = NULL;
275                  p_playlist->status.p_item = NULL;
276             }
277
278             i_activity= var_GetInteger( p_playlist, "activity") ;
279             var_SetInteger( p_playlist, "activity", i_activity -
280                             DEFAULT_INPUT_ACTIVITY );
281             goto check_input;
282         }
283         /* This input is dying, let it do */
284         else if( p_playlist->p_input->b_die )
285         {
286             PL_DEBUG( "dying input" );
287             PL_UNLOCK;
288             msleep( 25000 ); // 25 ms
289             PL_LOCK;
290             goto check_input;
291         }
292         /* This input has finished, ask it to die ! */
293         else if( p_playlist->p_input->b_error
294                   || p_playlist->p_input->b_eof )
295         {
296             PL_DEBUG( "finished input" );
297             input_StopThread( p_playlist->p_input );
298             /* No need to wait here, we'll wait in the p_input->b_die case */
299             goto check_input;
300         }
301         else if( p_playlist->p_input->i_state != INIT_S )
302         {
303             PL_UNLOCK;
304             ObjectGarbageCollector( p_playlist );
305             PL_LOCK;
306         }
307     }
308     else
309     {
310         /* No input. Several cases
311          *  - No request, running status -> start new item
312          *  - No request, stopped status -> collect garbage
313          *  - Request, running requested -> start new item
314          *  - Request, stopped requested -> collect garbage
315          */
316          if( (!p_playlist->request.b_request &&
317               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
318               ( p_playlist->request.b_request &&
319                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
320          {
321              msg_Dbg( p_playlist, "starting new item" );
322              p_item = playlist_NextItem( p_playlist );
323
324              if( p_item == NULL )
325              {
326                 msg_Dbg( p_playlist, "nothing to play" );
327                 if( b_playexit == VLC_TRUE )
328                 {
329                     msg_Info( p_playlist, "end of playlist, exiting" );
330                     p_playlist->p_libvlc->b_die = VLC_TRUE;
331                 }
332                 p_playlist->status.i_status = PLAYLIST_STOPPED;
333                 PL_UNLOCK
334                 return;
335              }
336              playlist_PlayItem( p_playlist, p_item );
337          }
338          else
339          {
340             p_playlist->status.i_status = PLAYLIST_STOPPED;
341             if( p_playlist->status.p_item &&
342                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
343             {
344                 PL_DEBUG( "deleting item marked for deletion" );
345                 playlist_ItemDelete( p_playlist->status.p_item );
346                 p_playlist->status.p_item = NULL;
347             }
348
349             /* Collect garbage */
350             PL_UNLOCK;
351             ObjectGarbageCollector( p_playlist );
352             PL_LOCK;
353         }
354     }
355     PL_UNLOCK
356 }
357
358 /** Playlist dying last loop */
359 void playlist_LastLoop( playlist_t *p_playlist )
360 {
361     vlc_object_t *p_obj;
362
363     /* If there is an input, kill it */
364     while( 1 )
365     {
366         PL_LOCK
367
368         if( p_playlist->p_input == NULL )
369         {
370             PL_UNLOCK
371             break;
372         }
373
374         if( p_playlist->p_input->b_dead )
375         {
376             input_thread_t *p_input;
377
378             /* Unlink current input */
379             p_input = p_playlist->p_input;
380             p_playlist->p_input = NULL;
381             PL_UNLOCK
382
383             /* Destroy input */
384             input_DestroyThread( p_input );
385             continue;
386         }
387         else if( p_playlist->p_input->b_die )
388         {
389             /* This input is dying, leave it alone */
390             ;
391         }
392         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
393         {
394             input_StopThread( p_playlist->p_input );
395             PL_UNLOCK
396             continue;
397         }
398         else
399         {
400             p_playlist->p_input->b_eof = 1;
401         }
402
403         PL_UNLOCK
404
405         msleep( INTF_IDLE_SLEEP );
406     }
407
408     /* close all remaining sout */
409     while( ( p_obj = vlc_object_find( p_playlist,
410                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
411     {
412         vlc_object_release( p_obj );
413         sout_DeleteInstance( (sout_instance_t*)p_obj );
414     }
415
416     /* close all remaining vout */
417     while( ( p_obj = vlc_object_find( p_playlist,
418                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
419     {
420         vlc_object_detach( p_obj );
421         vlc_object_release( p_obj );
422         vout_Destroy( (vout_thread_t *)p_obj );
423     }
424
425     while( p_playlist->i_sds )
426     {
427         playlist_ServicesDiscoveryRemove( p_playlist,
428                                           p_playlist->pp_sds[0]->psz_module );
429     }
430
431     playlist_MLDump( p_playlist );
432
433     PL_LOCK;
434     /* Go through all items, and simply free everything without caring
435      * about the tree structure. Do not decref, it will be done by doing
436      * the same thing on the input items array */
437     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
438         free( p_del->pp_children );
439         free( p_del );
440     FOREACH_END();
441     ARRAY_RESET( p_playlist->all_items );
442
443     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
444         input_ItemClean( p_del );
445         free( p_del );
446     FOREACH_END();
447     ARRAY_RESET( p_playlist->input_items );
448
449     ARRAY_RESET( p_playlist->items );
450     ARRAY_RESET( p_playlist->current );
451
452     PL_UNLOCK;
453 }
454
455 /** Main loop for preparser queue */
456 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
457 {
458     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
459     input_item_t *p_current;
460     int i_activity;
461     uint32_t i_m, i_o;
462
463     while( !p_playlist->b_die )
464     {
465         vlc_mutex_lock( &p_obj->object_lock );
466         while( p_obj->i_waiting == 0 )
467         {
468             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
469             if( p_playlist->b_die )
470             {
471                 vlc_mutex_unlock( &p_obj->object_lock );
472                 return;
473             }
474         }
475
476         p_current = p_obj->pp_waiting[0];
477         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
478         vlc_mutex_unlock( &p_obj->object_lock );
479
480         PL_LOCK;
481         if( p_current )
482         {
483             vlc_bool_t b_preparsed = VLC_FALSE;
484             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
485                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
486                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
487                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
488                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
489                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
490                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
491                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
492             {
493                 b_preparsed = VLC_TRUE;
494                 stats_TimerStart( p_playlist, "Preparse run",
495                                   STATS_TIMER_PREPARSE );
496                 PL_UNLOCK;
497                 input_Preparse( p_playlist, p_current );
498                 PL_LOCK;
499                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
500             }
501             PL_UNLOCK;
502             if( b_preparsed )
503             {
504                 p_current->p_meta->i_status |= ITEM_PREPARSED;
505                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
506             }
507             PL_LOCK;
508
509             /* If we haven't retrieved enough meta, add to secondary queue
510              * which will run the "meta fetchers".
511              * This only checks for meta, not for art
512              * \todo don't do this for things we won't get meta for, like vids
513              */
514             if( p_current->p_meta &&
515                 !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o ) )
516             {
517                 preparse_item_t p;
518                 PL_DEBUG("need to fetch meta for %s", p_current->psz_name );
519                 p.p_item = p_current;
520                 p.b_fetch_art = VLC_FALSE;
521                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
522                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
523                              p_playlist->p_fetcher->i_waiting,
524                              p_playlist->p_fetcher->i_waiting, p);
525                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
526                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
527             }
528             /* We already have all needed meta, but we need art right now */
529             else if( p_current->p_meta &&
530                      p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
531                      EMPTY_STR( p_current->p_meta->psz_arturl ) )
532             {
533                 preparse_item_t p;
534                 PL_DEBUG("meta ok for %s, need to fetch art",
535                                                          p_current->psz_name );
536                 p.p_item = p_current;
537                 p.b_fetch_art = VLC_TRUE;
538                 vlc_mutex_lock( &p_playlist->p_fetcher->object_lock );
539                 INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
540                              p_playlist->p_fetcher->i_waiting,
541                              p_playlist->p_fetcher->i_waiting, p);
542                 vlc_mutex_unlock( &p_playlist->p_fetcher->object_lock );
543                 vlc_cond_signal( &p_playlist->p_fetcher->object_wait );
544             }
545             else
546             {
547                 PL_DEBUG( "no fetch required for %s (art currently %s)",
548                           p_current->psz_name,
549                           p_current->p_meta ? p_current->p_meta->psz_arturl:
550                                               "null" );
551                 vlc_gc_decref( p_current );
552             }
553             PL_UNLOCK;
554         }
555         else
556             PL_UNLOCK;
557
558         vlc_mutex_lock( &p_obj->object_lock );
559         i_activity = var_GetInteger( p_playlist, "activity" );
560         if( i_activity < 0 ) i_activity = 0;
561         vlc_mutex_unlock( &p_obj->object_lock );
562         /* Sleep at least 1ms */
563         msleep( (i_activity+1) * 1000 );
564     }
565 }
566
567 /** Main loop for secondary preparser queue */
568 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
569 {
570     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
571     vlc_bool_t b_fetch_art;
572     input_item_t *p_item;
573     int i_activity;
574
575     while( !p_playlist->b_die )
576     {
577         vlc_mutex_lock( &p_obj->object_lock );
578         while( p_obj->i_waiting == 0 )
579         {
580             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
581             if( p_playlist->b_die )
582             {
583                 vlc_mutex_unlock( &p_obj->object_lock );
584                 return;
585             }
586         }
587
588         b_fetch_art = p_obj->p_waiting->b_fetch_art;
589         p_item = p_obj->p_waiting->p_item;
590         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
591         vlc_mutex_unlock( &p_obj->object_lock );
592         if( p_item )
593         {
594             assert( p_item->p_meta );
595             if( !b_fetch_art )
596             {
597                 input_MetaFetch( p_playlist, p_item );
598                 p_item->p_meta->i_status |= ITEM_META_FETCHED;
599                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
600                 /*  Fetch right now */
601                 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL )
602                 {
603                     vlc_mutex_lock( &p_obj->object_lock );
604                     preparse_item_t p;
605                     p.p_item = p_item;
606                     p.b_fetch_art = VLC_TRUE;
607                     INSERT_ELEM( p_playlist->p_fetcher->p_waiting,
608                                  p_playlist->p_fetcher->i_waiting,
609                                  0, p );
610                     PL_DEBUG("meta fetched for %s, get art", p_item->psz_name);
611                     vlc_mutex_unlock( &p_obj->object_lock );
612                     continue;
613                 }
614                 else
615                     vlc_gc_decref( p_item );
616             }
617             else
618             {
619                 int i_ret = input_ArtFind( p_playlist, p_item );
620                 if( i_ret == 1 )
621                 {
622                     PL_DEBUG("downloading art for %s", p_item->psz_name );
623                     if( input_DownloadAndCacheArt( p_playlist, p_item ) )
624                         p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
625                     else {
626                         p_item->p_meta->i_status |= ITEM_ART_FETCHED;
627                         var_SetInteger( p_playlist, "item-change",
628                                         p_item->i_id );
629                     }
630                 }
631                 else if( i_ret == 0 ) /* Was in cache */
632                 {
633                     PL_DEBUG("found art for %s in cache", p_item->psz_name );
634                     p_item->p_meta->i_status |= ITEM_ART_FETCHED;
635                     var_SetInteger( p_playlist, "item-change", p_item->i_id );
636                 }
637                 else
638                 {
639                     PL_DEBUG("art not found for %s", p_item->psz_name );
640                     p_item->p_meta->i_status |= ITEM_ART_NOTFOUND;
641                 }
642                 vlc_gc_decref( p_item );
643            }
644         }
645         vlc_mutex_lock( &p_obj->object_lock );
646         i_activity = var_GetInteger( p_playlist, "activity" );
647         if( i_activity < 0 ) i_activity = 0;
648         vlc_mutex_unlock( &p_obj->object_lock );
649         /* Sleep at least 1ms */
650         msleep( (i_activity+1) * 1000 );
651     }
652 }
653
654 static void VariablesInit( playlist_t *p_playlist )
655 {
656     vlc_value_t val;
657     /* These variables control updates */
658     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
659     val.b_bool = VLC_TRUE;
660     var_Set( p_playlist, "intf-change", val );
661
662     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
663     val.i_int = -1;
664     var_Set( p_playlist, "item-change", val );
665
666     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
667     val.i_int = -1;
668     var_Set( p_playlist, "item-deleted", val );
669
670     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
671
672     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
673     val.i_int = -1;
674     var_Set( p_playlist, "playlist-current", val );
675
676     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
677
678     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
679     val.b_bool = VLC_TRUE;
680     var_Set( p_playlist, "intf-show", val );
681
682     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
683     var_SetInteger( p_playlist, "activity", 0 );
684
685     /* Variables to control playback */
686     var_CreateGetBool( p_playlist, "play-and-stop" );
687     var_CreateGetBool( p_playlist, "play-and-exit" );
688     var_CreateGetBool( p_playlist, "random" );
689     var_CreateGetBool( p_playlist, "repeat" );
690     var_CreateGetBool( p_playlist, "loop" );
691
692     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
693 }