Preparser: use normal thread API
[vlc.git] / src / playlist / engine.c
1 /*****************************************************************************
2  * engine.c : Run the playlist and handle its control
3  *****************************************************************************
4  * Copyright (C) 1999-2008 the VideoLAN team
5  *
6  * Authors: Samuel Hocevar <sam@zoy.org>
7  *          ClĂ©ment Stenac <zorglub@videolan.org>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22  *****************************************************************************/
23
24 #ifdef HAVE_CONFIG_H
25 # include "config.h"
26 #endif
27
28 #include <stddef.h>
29 #include <assert.h>
30 #include <vlc_common.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 = 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     bool b_save;
65
66     /* Allocate structure */
67     p_playlist = vlc_custom_create( p_parent, sizeof( *p_playlist ),
68                                     VLC_OBJECT_GENERIC, playlist_name );
69     if( !p_playlist )
70         return NULL;
71
72     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
73     MALLOC_NULL( p_playlist->p, playlist_private_t );
74     memset( p_playlist->p, 0, sizeof( playlist_private_t ) );
75
76     libvlc_priv(p_parent->p_libvlc)->p_playlist = p_playlist;
77
78     VariablesInit( p_playlist );
79
80     /* Initialise data structures */
81     p_playlist->p->p_playlist = p_playlist;
82     p_playlist->i_last_playlist_id = 0;
83     p_playlist->p_input = NULL;
84
85     p_playlist->gc_date = 0;
86     p_playlist->b_cant_sleep = false;
87
88     ARRAY_INIT( p_playlist->items );
89     ARRAY_INIT( p_playlist->all_items );
90     ARRAY_INIT( p_playlist->items_to_delete );
91     ARRAY_INIT( p_playlist->current );
92
93     p_playlist->i_current_index = 0;
94     p_playlist->b_reset_currently_playing = true;
95     p_playlist->last_rebuild_date = 0;
96
97     p_playlist->b_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
98
99     p_playlist->b_doing_ml = false;
100
101     p_playlist->b_auto_preparse =
102                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
103
104     PL_LOCK; /* playlist_NodeCreate will check for it */
105     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
106                                     0, NULL );
107     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
108                                     0, p_playlist->p_root_category->p_input );
109     PL_UNLOCK;
110
111     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
112         return NULL;
113
114     /* Create playlist and media library */
115     PL_LOCK; /* playlist_NodesPairCreate will check for it */
116     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
117                             &p_playlist->p_local_category,
118                             &p_playlist->p_local_onelevel, false );
119     PL_UNLOCK;
120
121     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
122     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
123
124     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
125         !p_playlist->p_local_category->p_input ||
126         !p_playlist->p_local_onelevel->p_input )
127         return NULL;
128
129     if( config_GetInt( p_playlist, "media-library") )
130     {
131         PL_LOCK; /* playlist_NodesPairCreate will check for it */
132         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
133                             &p_playlist->p_ml_category,
134                             &p_playlist->p_ml_onelevel, false );
135         PL_UNLOCK;
136
137         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
138             return NULL;
139
140         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
141         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
142     }
143     else
144     {
145         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
146     }
147
148     /* Initial status */
149     p_playlist->status.p_item = NULL;
150     p_playlist->status.p_node = p_playlist->p_local_onelevel;
151     p_playlist->request.b_request = false;
152     p_playlist->status.i_status = PLAYLIST_STOPPED;
153
154     p_playlist->i_sort = SORT_ID;
155     p_playlist->i_order = ORDER_NORMAL;
156
157
158     b_save = p_playlist->b_auto_preparse;
159     p_playlist->b_auto_preparse = false;
160     playlist_MLLoad( p_playlist );
161     p_playlist->b_auto_preparse = true;
162
163     vlc_object_set_destructor( p_playlist, playlist_Destructor );
164
165     return p_playlist;
166 }
167
168 /**
169  * Destroy playlist
170  *
171  * Destroy a playlist structure.
172  * \param p_playlist the playlist object
173  * \return nothing
174  */
175
176 static void playlist_Destructor( vlc_object_t * p_this )
177 {
178     playlist_t * p_playlist = (playlist_t *)p_this;
179     playlist_preparse_t *p_preparse = &p_playlist->p->preparse;
180
181     /* Destroy the item preparser */
182     if (p_preparse->up)
183     {
184         vlc_cancel (p_preparse->thread);
185         vlc_join (p_preparse->thread, NULL);
186     }
187     while (p_preparse->i_waiting > 0)
188     {   /* Any left-over unparsed item? */
189         vlc_gc_decref (p_preparse->pp_waiting[0]);
190         REMOVE_ELEM (p_preparse->pp_waiting, p_preparse->i_waiting, 0);
191     }
192     vlc_cond_destroy (&p_preparse->wait);
193     vlc_mutex_destroy (&p_preparse->lock);
194
195     /* Destroy the item meta-infos fetcher */
196     if( p_playlist->p->p_fetcher )
197     {
198         vlc_object_release( p_playlist->p->p_fetcher );
199     }
200     msg_Dbg( p_this, "Destroyed" );
201 }
202
203 /* Destroy remaining objects */
204 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
205 {
206     if( !b_force )
207     {
208         if( mdate() - p_playlist->gc_date < 1000000 )
209         {
210             p_playlist->b_cant_sleep = true;
211             return;
212         }
213         else if( p_playlist->gc_date == 0 )
214             return;
215     }
216
217     p_playlist->b_cant_sleep = false;
218 }
219
220 /* Input Callback */
221 static void input_state_changed( const vlc_event_t * event, void * data )
222 {
223     (void)event;
224     playlist_t * p_playlist = data;
225     playlist_Signal( p_playlist );
226 }
227
228 /* Input Callback */
229 static void input_selected_stream_changed( const vlc_event_t * event, void * data )
230 {
231     (void)event;
232     playlist_t * p_playlist = data;
233     PL_LOCK;
234     p_playlist->gc_date = mdate();
235     vlc_object_signal_unlocked( p_playlist );
236     PL_UNLOCK;
237 }
238
239 /* Internals */
240 void playlist_release_current_input( playlist_t * p_playlist )
241 {
242     PL_ASSERT_LOCKED;
243
244     if( !p_playlist->p_input ) return;
245
246     input_thread_t * p_input = p_playlist->p_input;
247     vlc_event_manager_t * p_em = input_get_event_manager( p_input );
248
249     vlc_event_detach( p_em, vlc_InputStateChanged,
250                       input_state_changed, p_playlist );
251     vlc_event_detach( p_em, vlc_InputSelectedStreamChanged,
252                       input_selected_stream_changed, p_playlist );
253     p_playlist->p_input = NULL;
254
255     /* Release the playlist lock, because we may get stuck
256      * in vlc_object_release() for some time. */
257     PL_UNLOCK;
258     vlc_thread_join( p_input );
259     vlc_object_release( p_input );
260     PL_LOCK;
261 }
262
263 void playlist_set_current_input(
264     playlist_t * p_playlist, input_thread_t * p_input )
265 {
266     PL_ASSERT_LOCKED;
267
268     playlist_release_current_input( p_playlist );
269
270     if( p_input )
271     {
272         vlc_object_yield( p_input );
273         p_playlist->p_input = p_input;
274         vlc_event_manager_t * p_em = input_get_event_manager( p_input );
275         vlc_event_attach( p_em, vlc_InputStateChanged,
276                           input_state_changed, p_playlist );
277         vlc_event_attach( p_em, vlc_InputSelectedStreamChanged,
278                           input_selected_stream_changed, p_playlist );
279     }
280 }
281
282 /** Get current playing input.
283  */
284 input_thread_t * playlist_CurrentInput( playlist_t * p_playlist )
285 {
286     input_thread_t * p_input;
287     PL_LOCK;
288     p_input = p_playlist->p_input;
289     if( p_input ) vlc_object_yield( p_input );
290     PL_UNLOCK;
291     return p_input;
292 }
293
294 /**
295  * @}
296  */
297
298 /** Accessor for status item and status nodes.
299  */
300 playlist_item_t * get_current_status_item( playlist_t * p_playlist )
301 {
302     PL_ASSERT_LOCKED;
303
304     return p_playlist->status.p_item;
305 }
306
307 playlist_item_t * get_current_status_node( playlist_t * p_playlist )
308 {
309     PL_ASSERT_LOCKED;
310
311     return p_playlist->status.p_node;
312 }
313
314 void set_current_status_item( playlist_t * p_playlist,
315     playlist_item_t * p_item )
316 {
317     PL_ASSERT_LOCKED;
318
319     if( p_playlist->status.p_item &&
320         p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG &&
321         p_playlist->status.p_item != p_item )
322     {
323         /* It's unsafe given current design to delete a playlist item :(
324         playlist_ItemDelete( p_playlist->status.p_item ); */
325     }
326     p_playlist->status.p_item = p_item;
327 }
328
329 void set_current_status_node( playlist_t * p_playlist,
330     playlist_item_t * p_node )
331 {
332     PL_ASSERT_LOCKED;
333
334     if( p_playlist->status.p_node &&
335         p_playlist->status.p_node->i_flags & PLAYLIST_REMOVE_FLAG &&
336         p_playlist->status.p_node != p_node )
337     {
338         /* It's unsafe given current design to delete a playlist item :(
339         playlist_ItemDelete( p_playlist->status.p_node ); */
340     }
341     p_playlist->status.p_node = p_node;
342 }
343
344 /**
345  * Main loop
346  *
347  * Main loop for the playlist. It should be entered with the
348  * playlist lock (otherwise input event may be lost)
349  * \param p_playlist the playlist object
350  * \return nothing
351  */
352 void playlist_MainLoop( playlist_t *p_playlist )
353 {
354     playlist_item_t *p_item = NULL;
355     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
356
357     PL_ASSERT_LOCKED;
358
359     if( p_playlist->b_reset_currently_playing &&
360         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
361     {
362         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
363                                get_current_status_item( p_playlist ) );
364         p_playlist->last_rebuild_date = mdate();
365     }
366
367 check_input:
368     /* If there is an input, check that it doesn't need to die. */
369     if( p_playlist->p_input )
370     {
371         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
372         {
373             PL_DEBUG( "incoming request - stopping current input" );
374             input_StopThread( p_playlist->p_input );
375         }
376
377         /* This input is dead. Remove it ! */
378         if( p_playlist->p_input->b_dead )
379         {
380             int i_activity;
381             input_thread_t *p_input;
382             sout_instance_t **pp_sout = &p_playlist->p->p_sout;
383
384             PL_DEBUG( "dead input" );
385
386             p_input = p_playlist->p_input;
387
388             assert( *pp_sout == NULL );
389             if( var_CreateGetBool( p_input, "sout-keep" ) )
390                 *pp_sout = input_DetachSout( p_input );
391
392             /* Destroy input */
393             playlist_release_current_input( p_playlist );
394
395             p_playlist->gc_date = mdate();
396             p_playlist->b_cant_sleep = true;
397
398             i_activity= var_GetInteger( p_playlist, "activity" );
399             var_SetInteger( p_playlist, "activity", i_activity -
400                             DEFAULT_INPUT_ACTIVITY );
401
402             goto check_input;
403         }
404         /* This input is dying, let it do */
405         else if( p_playlist->p_input->b_die )
406         {
407             PL_DEBUG( "dying input" );
408             PL_UNLOCK;
409             msleep( INTF_IDLE_SLEEP );
410             PL_LOCK;
411             goto check_input;
412         }
413         /* This input has finished, ask it to die ! */
414         else if( p_playlist->p_input->b_error
415                   || p_playlist->p_input->b_eof )
416         {
417             PL_DEBUG( "finished input" );
418             input_StopThread( p_playlist->p_input );
419             /* No need to wait here, we'll wait in the p_input->b_die case */
420             goto check_input;
421         }
422         else if( p_playlist->p_input->i_state != INIT_S )
423         {
424             ObjectGarbageCollector( p_playlist, false );
425         }
426     }
427     else
428     {
429         /* No input. Several cases
430          *  - No request, running status -> start new item
431          *  - No request, stopped status -> collect garbage
432          *  - Request, running requested -> start new item
433          *  - Request, stopped requested -> collect garbage
434         */
435         int i_status = p_playlist->request.b_request ?
436             p_playlist->request.i_status : p_playlist->status.i_status;
437         if( i_status != PLAYLIST_STOPPED )
438         {
439             msg_Dbg( p_playlist, "starting new item" );
440             p_item = playlist_NextItem( p_playlist );
441
442             if( p_item == NULL )
443             {
444                 msg_Dbg( p_playlist, "nothing to play" );
445                 p_playlist->status.i_status = PLAYLIST_STOPPED;
446
447                 if( b_playexit == true )
448                 {
449                     msg_Info( p_playlist, "end of playlist, exiting" );
450                     vlc_object_kill( p_playlist->p_libvlc );
451                 }
452                 ObjectGarbageCollector( p_playlist, true );
453                 return;
454             }
455             playlist_PlayItem( p_playlist, p_item );
456             /* playlist_PlayItem loose input event, we need to recheck */
457             goto check_input;
458         }
459         else
460         {
461             const bool b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
462
463             p_playlist->status.i_status = PLAYLIST_STOPPED;
464
465             /* Collect garbage */
466             ObjectGarbageCollector( p_playlist, b_gc_forced );
467         }
468     }
469 }
470
471 /**
472  * Last loop
473  *
474  * The playlist is dying so do the last loop
475  * \param p_playlist the playlist object
476  * \return nothing
477 */
478 void playlist_LastLoop( playlist_t *p_playlist )
479 {
480     /* If there is an input, kill it */
481     while( 1 )
482     {
483         PL_LOCK;
484         if( p_playlist->p_input == NULL )
485         {
486             PL_UNLOCK;
487             break;
488         }
489
490         if( p_playlist->p_input->b_dead )
491         {
492             /* remove input */
493             playlist_release_current_input( p_playlist );
494
495             /* sout-keep: no need to anything here.
496              * The last input will destroy its sout, if any, by itself */
497
498             PL_UNLOCK;
499             continue;
500         }
501         else if( p_playlist->p_input->b_die )
502         {
503             /* This input is dying, leave it alone */
504             ;
505         }
506         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
507         {
508             input_StopThread( p_playlist->p_input );
509             PL_UNLOCK;
510             continue;
511         }
512         else
513         {
514             p_playlist->p_input->b_eof = 1;
515         }
516         PL_UNLOCK;
517
518         msleep( INTF_IDLE_SLEEP );
519     }
520
521 #ifdef ENABLE_SOUT
522     /* close the remaining sout-keep (if there was no input atm) */
523     sout_instance_t *p_sout = p_playlist->p->p_sout;
524     if (p_sout)
525         sout_DeleteInstance( p_sout );
526 #endif
527
528     /* Core should have terminated all SDs before the playlist */
529     /* TODO: It fails to do so when not playing anything -- Courmisch */
530     playlist_ServicesDiscoveryKillAll( p_playlist );
531     playlist_MLDump( p_playlist );
532
533     vlc_object_kill( p_playlist->p->p_fetcher );
534     vlc_thread_join( p_playlist->p->p_fetcher );
535
536     PL_LOCK;
537
538     /* Release the current node */
539     set_current_status_node( p_playlist, NULL );
540
541     /* Release the current item */
542     set_current_status_item( p_playlist, NULL );
543
544     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
545         free( p_del->pp_children );
546         vlc_gc_decref( p_del->p_input );
547         free( p_del );
548     FOREACH_END();
549     ARRAY_RESET( p_playlist->all_items );
550     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->items_to_delete )
551         free( p_del->pp_children );
552         vlc_gc_decref( p_del->p_input );
553         free( p_del );
554     FOREACH_END();
555     ARRAY_RESET( p_playlist->items_to_delete );
556
557     ARRAY_RESET( p_playlist->items );
558     ARRAY_RESET( p_playlist->current );
559
560     PL_UNLOCK;
561 }
562
563 /**
564  * Preparse queue loop
565  *
566  * @param p_obj preparse structure
567  * @return never
568  */
569 void *playlist_PreparseLoop( void *data )
570 {
571     playlist_preparse_t *p_preparse = data;
572     playlist_t *p_playlist =  ((playlist_private_t *)(((char *)p_preparse)
573              - offsetof(playlist_private_t, preparse)))->p_playlist;
574     int i_activity;
575
576     for( ;; )
577     {
578         input_item_t *p_current;
579
580         vlc_mutex_lock( &p_preparse->lock );
581         mutex_cleanup_push( &p_preparse->lock );
582
583         while( p_preparse->i_waiting == 0 )
584             vlc_cond_wait( &p_preparse->wait, &p_preparse->lock );
585
586         p_current = p_preparse->pp_waiting[0];
587         REMOVE_ELEM( p_preparse->pp_waiting, p_preparse->i_waiting, 0 );
588         vlc_cleanup_run( );
589
590         if( p_current )
591         {
592             int canc = vlc_savecancel ();
593             PL_LOCK;
594             if( p_current->i_type == ITEM_TYPE_FILE )
595             {
596                 stats_TimerStart( p_playlist, "Preparse run",
597                                   STATS_TIMER_PREPARSE );
598                 /* Do not preparse if it is already done (like by playing it) */
599                 if( !input_item_IsPreparsed( p_current ) )
600                 {
601                     PL_UNLOCK;
602                     input_Preparse( p_playlist, p_current );
603                     PL_LOCK;
604                 }
605                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
606                 PL_UNLOCK;
607                 input_item_SetPreparsed( p_current, true );
608                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
609                 PL_LOCK;
610             }
611             /* If we haven't retrieved enough meta, add to secondary queue
612              * which will run the "meta fetchers".
613              * This only checks for meta, not for art
614              * \todo don't do this for things we won't get meta for, like vids
615              */
616             char *psz_arturl = input_item_GetArtURL( p_current );
617             char *psz_name = input_item_GetName( p_current );
618             if( p_playlist->p->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
619                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
620             {
621                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
622                 vlc_object_lock( p_playlist->p->p_fetcher );
623                 if( vlc_object_alive( p_playlist->p->p_fetcher ) )
624                 {
625                     INSERT_ELEM( p_playlist->p->p_fetcher->pp_waiting,
626                         p_playlist->p->p_fetcher->i_waiting,
627                         p_playlist->p->p_fetcher->i_waiting, p_current);
628                     vlc_object_signal_unlocked( p_playlist->p->p_fetcher );
629                 }
630                 else
631                     vlc_gc_decref( p_current );
632                 vlc_object_unlock( p_playlist->p->p_fetcher );
633             }
634             else
635             {
636                 PL_DEBUG( "no fetch required for %s (art currently %s)",
637                           psz_name, psz_arturl );
638                 vlc_gc_decref( p_current );
639             }
640             free( psz_name );
641             free( psz_arturl );
642             PL_UNLOCK;
643             vlc_restorecancel( canc );
644         }
645
646         i_activity = var_GetInteger( p_playlist, "activity" );
647         if( i_activity < 0 ) i_activity = 0;
648         /* Sleep at least 1ms */
649         msleep( (i_activity+1) * 1000 );
650     }
651
652     assert( 0 );
653     return NULL;
654 }
655
656 /**
657  * Fetcher loop
658  *
659  * Main loop for secondary preparser queue
660  * \param p_obj items to preparse
661  * \return nothing
662  */
663 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
664 {
665     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
666     input_item_t *p_item;
667     int i_activity;
668
669     vlc_object_lock( p_obj );
670
671     while( vlc_object_alive( p_obj ) )
672     {
673         if( p_obj->i_waiting == 0 )
674         {
675             vlc_object_wait( p_obj );
676             continue;
677         }
678
679         p_item = p_obj->pp_waiting[0];
680         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
681         vlc_object_unlock( p_obj );
682         if( p_item )
683         {
684             int i_ret;
685
686             /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
687              * (This can happen if we fetch art on play)
688              * FIXME this doesn't work if we need to fetch meta before art ... */
689             for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
690             {
691                 bool b_break;
692                 PL_LOCK;
693                 b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
694                             p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
695                 PL_UNLOCK;
696                 if( b_break )
697                     break;
698                 msleep( 50000 );
699             }
700
701             i_ret = input_ArtFind( p_playlist, p_item );
702             if( i_ret == 1 )
703             {
704                 PL_DEBUG( "downloading art for %s", p_item->psz_name );
705                 if( input_DownloadAndCacheArt( p_playlist, p_item ) )
706                     input_item_SetArtNotFound( p_item, true );
707                 else {
708                     input_item_SetArtFetched( p_item, true );
709                     var_SetInteger( p_playlist, "item-change",
710                                     p_item->i_id );
711                 }
712             }
713             else if( i_ret == 0 ) /* Was in cache */
714             {
715                 PL_DEBUG( "found art for %s in cache", p_item->psz_name );
716                 input_item_SetArtFetched( p_item, true );
717                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
718             }
719             else
720             {
721                 PL_DEBUG( "art not found for %s", p_item->psz_name );
722                 input_item_SetArtNotFound( p_item, true );
723             }
724             vlc_gc_decref( p_item );
725         }
726         vlc_object_lock( p_obj );
727         i_activity = var_GetInteger( p_playlist, "activity" );
728         if( i_activity < 0 ) i_activity = 0;
729         vlc_object_unlock( p_obj );
730         /* Sleep at least 1ms */
731         msleep( (i_activity+1) * 1000 );
732         vlc_object_lock( p_obj );
733     }
734
735     while( p_obj->i_waiting > 0 )
736     {
737         vlc_gc_decref( p_obj->pp_waiting[0] );
738         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
739     }
740
741     vlc_object_unlock( p_obj );
742 }
743
744 static void VariablesInit( playlist_t *p_playlist )
745 {
746     vlc_value_t val;
747     /* These variables control updates */
748     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
749     val.b_bool = true;
750     var_Set( p_playlist, "intf-change", val );
751
752     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
753     val.i_int = -1;
754     var_Set( p_playlist, "item-change", val );
755
756     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
757     val.i_int = -1;
758     var_Set( p_playlist, "item-deleted", val );
759
760     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
761
762     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
763     val.i_int = -1;
764     var_Set( p_playlist, "playlist-current", val );
765
766     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
767     var_SetInteger( p_playlist, "activity", 0 );
768
769     /* Variables to control playback */
770     var_CreateGetBool( p_playlist, "play-and-stop" );
771     var_CreateGetBool( p_playlist, "play-and-exit" );
772     var_CreateGetBool( p_playlist, "random" );
773     var_CreateGetBool( p_playlist, "repeat" );
774     var_CreateGetBool( p_playlist, "loop" );
775
776     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
777 }