f39f60355ac6582e58dd205ffeb665b23dda1315
[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 = 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_PLAYLIST, playlist_name );
69     if( !p_playlist )
70     {
71         msg_Err( p_parent, "out of memory" );
72         return NULL;
73     }
74
75     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
76
77     p_parent->p_libvlc->p_playlist = p_playlist;
78
79     VariablesInit( p_playlist );
80
81     /* Initialise data structures */
82     vlc_mutex_init( &p_playlist->gc_lock );
83     p_playlist->i_last_playlist_id = 0;
84     p_playlist->p_input = NULL;
85
86     p_playlist->gc_date = 0;
87     p_playlist->b_cant_sleep = false;
88
89     ARRAY_INIT( p_playlist->items );
90     ARRAY_INIT( p_playlist->all_items );
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     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
105                                     0, NULL );
106     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
107                                     0, p_playlist->p_root_category->p_input );
108
109     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
110         return NULL;
111
112     /* Create playlist and media library */
113     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
114                             &p_playlist->p_local_category,
115                             &p_playlist->p_local_onelevel, false );
116
117     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
118     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
119
120     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
121         !p_playlist->p_local_category->p_input ||
122         !p_playlist->p_local_onelevel->p_input )
123         return NULL;
124
125     if( config_GetInt( p_playlist, "media-library") )
126     {
127         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
128                             &p_playlist->p_ml_category,
129                             &p_playlist->p_ml_onelevel, false );
130
131         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
132             return NULL;
133
134         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
135         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
136     }
137     else
138     {
139         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
140     }
141
142     /* Initial status */
143     p_playlist->status.p_item = NULL;
144     p_playlist->status.p_node = p_playlist->p_local_onelevel;
145     p_playlist->request.b_request = false;
146     p_playlist->status.i_status = PLAYLIST_STOPPED;
147
148     p_playlist->i_sort = SORT_ID;
149     p_playlist->i_order = ORDER_NORMAL;
150
151
152     b_save = p_playlist->b_auto_preparse;
153     p_playlist->b_auto_preparse = false;
154     playlist_MLLoad( p_playlist );
155     p_playlist->b_auto_preparse = true;
156
157     vlc_object_set_destructor( p_playlist, playlist_Destructor );
158
159     return p_playlist;
160 }
161
162 /**
163  * Destroy playlist
164  *
165  * Destroy a playlist structure.
166  * \param p_playlist the playlist object
167  * \return nothing
168  */
169 void playlist_Destroy( playlist_t *p_playlist )
170 {
171     /* XXX: should go in the playlist destructor */
172     var_Destroy( p_playlist, "intf-change" );
173     var_Destroy( p_playlist, "item-change" );
174     var_Destroy( p_playlist, "playlist-current" );
175     var_Destroy( p_playlist, "intf-popupmenu" );
176     var_Destroy( p_playlist, "intf-show" );
177     var_Destroy( p_playlist, "play-and-stop" );
178     var_Destroy( p_playlist, "play-and-exit" );
179     var_Destroy( p_playlist, "random" );
180     var_Destroy( p_playlist, "repeat" );
181     var_Destroy( p_playlist, "loop" );
182     var_Destroy( p_playlist, "activity" );
183
184     vlc_object_release( p_playlist );
185 }
186
187 static void playlist_Destructor( vlc_object_t * p_this )
188 {
189     playlist_t * p_playlist = (playlist_t *)p_this;
190
191     // Kill preparser
192     if( p_playlist->p_preparse )
193     {
194         vlc_object_release( p_playlist->p_preparse );
195     }
196
197     // Kill meta fetcher
198     if( p_playlist->p_fetcher )
199     {
200         vlc_object_release( p_playlist->p_fetcher );
201     }
202 }
203
204 /* Destroy remaining objects */
205 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
206 {
207     vlc_object_t *p_obj;
208
209     if( !b_force )
210     {
211         if( mdate() - p_playlist->gc_date < 1000000 )
212         {
213             p_playlist->b_cant_sleep = true;
214             return;
215         }
216         else if( p_playlist->gc_date == 0 )
217             return;
218     }
219
220     vlc_mutex_lock( &p_playlist->gc_lock );
221     while( ( p_obj = vlc_object_find( p_playlist->p_libvlc, VLC_OBJECT_VOUT,
222                                                   FIND_CHILD ) ) )
223     {
224         if( p_obj->p_parent != VLC_OBJECT(p_playlist->p_libvlc) )
225         {
226             vlc_object_release( p_obj );
227             break;
228         }
229         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
230         vlc_object_detach( p_obj );
231         vlc_object_release( p_obj );
232         vout_Destroy( (vout_thread_t *)p_obj );
233     }
234 #ifdef ENABLE_SOUT
235     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
236                                                   FIND_CHILD ) ) )
237     {
238         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
239         {
240             vlc_object_release( p_obj );
241             break;
242         }
243         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
244         vlc_object_detach( p_obj );
245         vlc_object_release( p_obj );
246         sout_DeleteInstance( (sout_instance_t*)p_obj );
247     }
248 #endif
249     p_playlist->b_cant_sleep = false;
250     vlc_mutex_unlock( &p_playlist->gc_lock );
251 }
252
253 /**
254  * Main loop
255  *
256  * Main loop for the playlist
257  * \param p_playlist the playlist object
258  * \return nothing
259  */
260 void playlist_MainLoop( playlist_t *p_playlist )
261 {
262     playlist_item_t *p_item = NULL;
263     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
264     PL_LOCK;
265
266     if( p_playlist->b_reset_currently_playing &&
267         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
268     {
269         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
270                              p_playlist->status.p_item );
271         p_playlist->last_rebuild_date = mdate();
272     }
273
274 check_input:
275     /* If there is an input, check that it doesn't need to die. */
276     if( p_playlist->p_input )
277     {
278         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
279         {
280             PL_DEBUG( "incoming request - stopping current input" );
281             input_StopThread( p_playlist->p_input );
282         }
283
284         /* This input is dead. Remove it ! */
285         if( p_playlist->p_input->b_dead )
286         {
287             int i_activity;
288             input_thread_t *p_input;
289             PL_DEBUG( "dead input" );
290
291             p_input = p_playlist->p_input;
292             p_playlist->p_input = NULL;
293
294             /* Release the playlist lock, because we may get stuck
295              * in vlc_object_release() for some time. */
296             PL_UNLOCK;
297
298             /* Destroy input */
299             vlc_object_release( p_input );
300
301             PL_LOCK;
302
303             p_playlist->gc_date = mdate();
304             p_playlist->b_cant_sleep = true;
305
306             if( p_playlist->status.p_item->i_flags
307                 & PLAYLIST_REMOVE_FLAG )
308             {
309                  PL_DEBUG( "%s was marked for deletion, deleting",
310                                  PLI_NAME( p_playlist->status.p_item  ) );
311                  playlist_ItemDelete( p_playlist->status.p_item );
312                  if( p_playlist->request.p_item == p_playlist->status.p_item )
313                      p_playlist->request.p_item = NULL;
314                  p_playlist->status.p_item = NULL;
315             }
316
317             i_activity= var_GetInteger( p_playlist, "activity" );
318             var_SetInteger( p_playlist, "activity", i_activity -
319                             DEFAULT_INPUT_ACTIVITY );
320             goto check_input;
321         }
322         /* This input is dying, let it do */
323         else if( p_playlist->p_input->b_die )
324         {
325             PL_DEBUG( "dying input" );
326             PL_UNLOCK;
327             msleep( INTF_IDLE_SLEEP );
328             PL_LOCK;
329             goto check_input;
330         }
331         /* This input has finished, ask it to die ! */
332         else if( p_playlist->p_input->b_error
333                   || p_playlist->p_input->b_eof )
334         {
335             PL_DEBUG( "finished input" );
336             input_StopThread( p_playlist->p_input );
337             /* No need to wait here, we'll wait in the p_input->b_die case */
338             goto check_input;
339         }
340         else if( p_playlist->p_input->i_state != INIT_S )
341         {
342             PL_UNLOCK;
343             ObjectGarbageCollector( p_playlist, false );
344             PL_LOCK;
345         }
346     }
347     else
348     {
349         /* No input. Several cases
350          *  - No request, running status -> start new item
351          *  - No request, stopped status -> collect garbage
352          *  - Request, running requested -> start new item
353          *  - Request, stopped requested -> collect garbage
354         */
355         if( p_playlist->request.i_status != PLAYLIST_STOPPED )
356         {
357             msg_Dbg( p_playlist, "starting new item" );
358             p_item = playlist_NextItem( p_playlist );
359
360             if( p_item == NULL )
361             {
362                 msg_Dbg( p_playlist, "nothing to play" );
363                 p_playlist->status.i_status = PLAYLIST_STOPPED;
364                 PL_UNLOCK;
365
366                 if( b_playexit == true )
367                 {
368                     msg_Info( p_playlist, "end of playlist, exiting" );
369                     vlc_object_kill( p_playlist->p_libvlc );
370                 }
371                 ObjectGarbageCollector( p_playlist, true );
372                 return;
373              }
374              playlist_PlayItem( p_playlist, p_item );
375          }
376          else
377          {
378             const bool b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
379
380             p_playlist->status.i_status = PLAYLIST_STOPPED;
381             if( p_playlist->status.p_item &&
382                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
383             {
384                 PL_DEBUG( "deleting item marked for deletion" );
385                 playlist_ItemDelete( p_playlist->status.p_item );
386                 p_playlist->status.p_item = NULL;
387             }
388
389             /* Collect garbage */
390             PL_UNLOCK;
391             ObjectGarbageCollector( p_playlist, b_gc_forced );
392             PL_LOCK;
393         }
394     }
395     PL_UNLOCK;
396 }
397
398 /**
399  * Last loop
400  *
401  * The playlist is dying so do the last loop
402  * \param p_playlist the playlist object
403  * \return nothing
404 */
405 void playlist_LastLoop( playlist_t *p_playlist )
406 {
407     vlc_object_t *p_obj;
408
409     /* If there is an input, kill it */
410     while( 1 )
411     {
412         PL_LOCK;
413         if( p_playlist->p_input == NULL )
414         {
415             PL_UNLOCK;
416             break;
417         }
418
419         if( p_playlist->p_input->b_dead )
420         {
421             input_thread_t *p_input;
422
423             /* Unlink current input */
424             p_input = p_playlist->p_input;
425             p_playlist->p_input = NULL;
426             PL_UNLOCK;
427
428             /* Destroy input */
429             vlc_object_release( p_input );
430             continue;
431         }
432         else if( p_playlist->p_input->b_die )
433         {
434             /* This input is dying, leave it alone */
435             ;
436         }
437         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
438         {
439             input_StopThread( p_playlist->p_input );
440             PL_UNLOCK;
441             continue;
442         }
443         else
444         {
445             p_playlist->p_input->b_eof = 1;
446         }
447         PL_UNLOCK;
448
449         msleep( INTF_IDLE_SLEEP );
450     }
451
452 #ifdef ENABLE_SOUT
453     /* close all remaining sout */
454     while( ( p_obj = vlc_object_find( p_playlist,
455                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
456     {
457         vlc_object_detach( p_obj );
458         vlc_object_release( p_obj );
459         sout_DeleteInstance( (sout_instance_t*)p_obj );
460     }
461 #endif
462
463     /* close all remaining vout */
464     while( ( p_obj = vlc_object_find( p_playlist,
465                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
466     {
467         vlc_object_detach( p_obj );
468         vlc_object_release( p_obj );
469         vout_Destroy( (vout_thread_t *)p_obj );
470     }
471
472     while( p_playlist->i_sds )
473     {
474         playlist_ServicesDiscoveryRemove( p_playlist,
475                                           p_playlist->pp_sds[0]->p_sd->psz_module );
476     }
477
478     playlist_MLDump( p_playlist );
479
480     PL_LOCK;
481     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
482         free( p_del->pp_children );
483         vlc_gc_decref( p_del->p_input );
484         free( p_del );
485     FOREACH_END();
486     ARRAY_RESET( p_playlist->all_items );
487
488     ARRAY_RESET( p_playlist->items );
489     ARRAY_RESET( p_playlist->current );
490
491     PL_UNLOCK;
492 }
493
494 /**
495  * Preparse loop
496  *
497  * Main loop for preparser queue
498  * \param p_obj items to preparse
499  * \return nothing
500  */
501 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
502 {
503     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
504     input_item_t *p_current;
505     int i_activity;
506
507     while( !p_playlist->b_die )
508     {
509         vlc_object_lock( p_obj );
510         while( p_obj->i_waiting == 0 )
511         {
512             if( vlc_object_wait( p_obj ) || p_playlist->b_die )
513             {
514                 vlc_object_unlock( p_obj );
515                 return;
516             }
517         }
518
519         p_current = p_obj->pp_waiting[0];
520         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
521         vlc_object_unlock( p_obj );
522
523         PL_LOCK;
524         if( p_current )
525         {
526             if( p_current->i_type == ITEM_TYPE_FILE )
527             {
528                 stats_TimerStart( p_playlist, "Preparse run",
529                                   STATS_TIMER_PREPARSE );
530                 /* Do not preparse if it is already done (like by playing it) */
531                 if( !input_item_IsPreparsed( p_current ) )
532                 {
533                     PL_UNLOCK;
534                     input_Preparse( p_playlist, p_current );
535                     PL_LOCK;
536                 }
537                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
538                 PL_UNLOCK;
539                 input_item_SetPreparsed( p_current, true );
540                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
541                 PL_LOCK;
542             }
543             /* If we haven't retrieved enough meta, add to secondary queue
544              * which will run the "meta fetchers".
545              * This only checks for meta, not for art
546              * \todo don't do this for things we won't get meta for, like vids
547              */
548             char *psz_arturl = input_item_GetArtURL( p_current );
549             char *psz_name = input_item_GetName( p_current );
550             if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
551                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
552             {
553                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
554                 vlc_object_lock( p_playlist->p_fetcher );
555                 INSERT_ELEM( p_playlist->p_fetcher->pp_waiting,
556                              p_playlist->p_fetcher->i_waiting,
557                              p_playlist->p_fetcher->i_waiting, p_current);
558                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
559                 vlc_object_unlock( p_playlist->p_fetcher );
560             }
561             else
562             {
563                 PL_DEBUG( "no fetch required for %s (art currently %s)",
564                           psz_name, psz_arturl );
565                 vlc_gc_decref( p_current );
566             }
567             free( psz_name );
568             free( psz_arturl );
569             PL_UNLOCK;
570         }
571         else
572             PL_UNLOCK;
573
574         vlc_object_lock( p_obj );
575         i_activity = var_GetInteger( p_playlist, "activity" );
576         if( i_activity < 0 ) i_activity = 0;
577         vlc_object_unlock( p_obj );
578         /* Sleep at least 1ms */
579         msleep( (i_activity+1) * 1000 );
580     }
581 }
582
583 /**
584  * Fetcher loop
585  *
586  * Main loop for secondary preparser queue
587  * \param p_obj items to preparse
588  * \return nothing
589  */
590 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
591 {
592     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
593     input_item_t *p_item;
594     int i_activity;
595
596     while( !p_playlist->b_die )
597     {
598         vlc_mutex_lock( &p_obj->object_lock );
599         while( p_obj->i_waiting == 0 )
600         {
601             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
602             if( p_playlist->b_die )
603             {
604                 vlc_mutex_unlock( &p_obj->object_lock );
605                 return;
606             }
607         }
608
609         p_item = p_obj->pp_waiting[0];
610         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
611         vlc_mutex_unlock( &p_obj->object_lock );
612         if( p_item )
613         {
614             int i_ret;
615
616             /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
617              * (This can happen if we fetch art on play)
618              * FIXME this doesn't work if we need to fetch meta before art ... */
619             for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
620             {
621                 bool b_break;
622                 PL_LOCK;
623                 b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
624                             p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
625                 PL_UNLOCK;
626                 if( b_break )
627                     break;
628                 msleep( 50000 );
629             }
630
631             i_ret = input_ArtFind( p_playlist, p_item );
632             if( i_ret == 1 )
633             {
634                 PL_DEBUG( "downloading art for %s", p_item->psz_name );
635                 if( input_DownloadAndCacheArt( p_playlist, p_item ) )
636                     input_item_SetArtNotFound( p_item, true );
637                 else {
638                     input_item_SetArtFetched( p_item, true );
639                     var_SetInteger( p_playlist, "item-change",
640                                     p_item->i_id );
641                 }
642             }
643             else if( i_ret == 0 ) /* Was in cache */
644             {
645                 PL_DEBUG( "found art for %s in cache", p_item->psz_name );
646                 input_item_SetArtFetched( p_item, true );
647                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
648             }
649             else
650             {
651                 PL_DEBUG( "art not found for %s", p_item->psz_name );
652                 input_item_SetArtNotFound( p_item, true );
653             }
654             vlc_gc_decref( p_item );
655         }
656         vlc_object_lock( p_obj );
657         i_activity = var_GetInteger( p_playlist, "activity" );
658         if( i_activity < 0 ) i_activity = 0;
659         vlc_object_unlock( p_obj );
660         /* Sleep at least 1ms */
661         msleep( (i_activity+1) * 1000 );
662     }
663 }
664
665 static void VariablesInit( playlist_t *p_playlist )
666 {
667     vlc_value_t val;
668     /* These variables control updates */
669     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
670     val.b_bool = true;
671     var_Set( p_playlist, "intf-change", val );
672
673     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
674     val.i_int = -1;
675     var_Set( p_playlist, "item-change", val );
676
677     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
678     val.i_int = -1;
679     var_Set( p_playlist, "item-deleted", val );
680
681     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
682
683     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
684     val.i_int = -1;
685     var_Set( p_playlist, "playlist-current", val );
686
687     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
688
689     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
690     val.b_bool = true;
691     var_Set( p_playlist, "intf-show", val );
692
693     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
694     var_SetInteger( p_playlist, "activity", 0 );
695
696     /* Variables to control playback */
697     var_CreateGetBool( p_playlist, "play-and-stop" );
698     var_CreateGetBool( p_playlist, "play-and-exit" );
699     var_CreateGetBool( p_playlist, "random" );
700     var_CreateGetBool( p_playlist, "repeat" );
701     var_CreateGetBool( p_playlist, "loop" );
702
703     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
704 }