1 /*****************************************************************************
2 * engine.c : Run the playlist and handle its control
3 *****************************************************************************
4 * Copyright (C) 1999-2007 the VideoLAN team
7 * Authors: Samuel Hocevar <sam@zoy.org>
8 * Clément Stenac <zorglub@videolan.org>
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.
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.
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 *****************************************************************************/
32 #include <vlc_playlist.h>
33 #include <vlc_interface.h>
34 #include "playlist_internal.h"
35 #include "stream_output/stream_output.h" /* sout_DeleteInstance */
37 /*****************************************************************************
39 *****************************************************************************/
40 static void VariablesInit( playlist_t *p_playlist );
41 static void playlist_Destructor( vlc_object_t * p_this );
43 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
44 vlc_value_t oldval, vlc_value_t newval, void *a )
46 (void)psz_cmd; (void)oldval; (void)newval; (void)a;
48 ((playlist_t*)p_this)->b_reset_currently_playing = true;
49 playlist_Signal( ((playlist_t*)p_this) );
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
60 playlist_t * playlist_Create( vlc_object_t *p_parent )
62 static const char playlist_name[] = "playlist";
63 playlist_t *p_playlist;
66 /* Allocate structure */
67 p_playlist = vlc_custom_create( p_parent, sizeof( *p_playlist ),
68 VLC_OBJECT_PLAYLIST, playlist_name );
71 msg_Err( p_parent, "out of memory" );
75 TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
77 libvlc_priv(p_parent->p_libvlc)->p_playlist = p_playlist;
79 VariablesInit( p_playlist );
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;
86 p_playlist->gc_date = 0;
87 p_playlist->b_cant_sleep = false;
89 ARRAY_INIT( p_playlist->items );
90 ARRAY_INIT( p_playlist->all_items );
91 ARRAY_INIT( p_playlist->current );
93 p_playlist->i_current_index = 0;
94 p_playlist->b_reset_currently_playing = true;
95 p_playlist->last_rebuild_date = 0;
97 p_playlist->b_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
99 p_playlist->b_doing_ml = false;
101 p_playlist->b_auto_preparse =
102 var_CreateGetBool( p_playlist, "auto-preparse" ) ;
104 p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
106 p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
107 0, p_playlist->p_root_category->p_input );
109 if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
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 );
117 p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
118 p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
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 )
125 if( config_GetInt( p_playlist, "media-library") )
127 playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
128 &p_playlist->p_ml_category,
129 &p_playlist->p_ml_onelevel, false );
131 if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
134 p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
135 p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
139 p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
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;
148 p_playlist->i_sort = SORT_ID;
149 p_playlist->i_order = ORDER_NORMAL;
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;
157 vlc_object_set_destructor( p_playlist, playlist_Destructor );
165 * Destroy a playlist structure.
166 * \param p_playlist the playlist object
170 static void playlist_Destructor( vlc_object_t * p_this )
172 playlist_t * p_playlist = (playlist_t *)p_this;
174 if( p_playlist->p_preparse )
175 vlc_object_release( p_playlist->p_preparse );
177 if( p_playlist->p_fetcher )
178 vlc_object_release( p_playlist->p_fetcher );
181 /* Destroy remaining objects */
182 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
188 if( mdate() - p_playlist->gc_date < 1000000 )
190 p_playlist->b_cant_sleep = true;
193 else if( p_playlist->gc_date == 0 )
197 vlc_mutex_lock( &p_playlist->gc_lock );
198 while( ( p_obj = vlc_object_find( p_playlist->p_libvlc, VLC_OBJECT_VOUT,
201 if( p_obj->p_parent != VLC_OBJECT(p_playlist->p_libvlc) )
203 vlc_object_release( p_obj );
206 msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
207 vlc_object_detach( p_obj );
208 vlc_object_release( p_obj );
209 vout_Destroy( (vout_thread_t *)p_obj );
212 while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
215 if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
217 vlc_object_release( p_obj );
220 msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
221 vlc_object_detach( p_obj );
222 vlc_object_release( p_obj );
223 sout_DeleteInstance( (sout_instance_t*)p_obj );
226 p_playlist->b_cant_sleep = false;
227 vlc_mutex_unlock( &p_playlist->gc_lock );
233 * Main loop for the playlist
234 * \param p_playlist the playlist object
237 void playlist_MainLoop( playlist_t *p_playlist )
239 playlist_item_t *p_item = NULL;
240 bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
243 if( p_playlist->b_reset_currently_playing &&
244 mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
246 ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
247 p_playlist->status.p_item );
248 p_playlist->last_rebuild_date = mdate();
252 /* If there is an input, check that it doesn't need to die. */
253 if( p_playlist->p_input )
255 if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
257 PL_DEBUG( "incoming request - stopping current input" );
258 input_StopThread( p_playlist->p_input );
261 /* This input is dead. Remove it ! */
262 if( p_playlist->p_input->b_dead )
265 input_thread_t *p_input;
266 PL_DEBUG( "dead input" );
268 p_input = p_playlist->p_input;
269 p_playlist->p_input = NULL;
271 /* Release the playlist lock, because we may get stuck
272 * in vlc_object_release() for some time. */
276 vlc_object_release( p_input );
280 p_playlist->gc_date = mdate();
281 p_playlist->b_cant_sleep = true;
283 if( p_playlist->status.p_item->i_flags
284 & PLAYLIST_REMOVE_FLAG )
286 PL_DEBUG( "%s was marked for deletion, deleting",
287 PLI_NAME( p_playlist->status.p_item ) );
288 playlist_ItemDelete( p_playlist->status.p_item );
289 if( p_playlist->request.p_item == p_playlist->status.p_item )
290 p_playlist->request.p_item = NULL;
291 p_playlist->status.p_item = NULL;
294 i_activity= var_GetInteger( p_playlist, "activity" );
295 var_SetInteger( p_playlist, "activity", i_activity -
296 DEFAULT_INPUT_ACTIVITY );
299 /* This input is dying, let it do */
300 else if( p_playlist->p_input->b_die )
302 PL_DEBUG( "dying input" );
304 msleep( INTF_IDLE_SLEEP );
308 /* This input has finished, ask it to die ! */
309 else if( p_playlist->p_input->b_error
310 || p_playlist->p_input->b_eof )
312 PL_DEBUG( "finished input" );
313 input_StopThread( p_playlist->p_input );
314 /* No need to wait here, we'll wait in the p_input->b_die case */
317 else if( p_playlist->p_input->i_state != INIT_S )
320 ObjectGarbageCollector( p_playlist, false );
326 /* No input. Several cases
327 * - No request, running status -> start new item
328 * - No request, stopped status -> collect garbage
329 * - Request, running requested -> start new item
330 * - Request, stopped requested -> collect garbage
332 int i_status = p_playlist->request.b_request ?
333 p_playlist->request.i_status : p_playlist->status.i_status;
334 if( i_status != PLAYLIST_STOPPED )
336 msg_Dbg( p_playlist, "starting new item" );
337 p_item = playlist_NextItem( p_playlist );
341 msg_Dbg( p_playlist, "nothing to play" );
342 p_playlist->status.i_status = PLAYLIST_STOPPED;
345 if( b_playexit == true )
347 msg_Info( p_playlist, "end of playlist, exiting" );
348 vlc_object_kill( p_playlist->p_libvlc );
350 ObjectGarbageCollector( p_playlist, true );
353 playlist_PlayItem( p_playlist, p_item );
357 const bool b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
359 p_playlist->status.i_status = PLAYLIST_STOPPED;
360 if( p_playlist->status.p_item &&
361 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
363 PL_DEBUG( "deleting item marked for deletion" );
364 playlist_ItemDelete( p_playlist->status.p_item );
365 p_playlist->status.p_item = NULL;
368 /* Collect garbage */
370 ObjectGarbageCollector( p_playlist, b_gc_forced );
380 * The playlist is dying so do the last loop
381 * \param p_playlist the playlist object
384 void playlist_LastLoop( playlist_t *p_playlist )
388 /* If there is an input, kill it */
392 if( p_playlist->p_input == NULL )
398 if( p_playlist->p_input->b_dead )
400 input_thread_t *p_input;
402 /* Unlink current input */
403 p_input = p_playlist->p_input;
404 p_playlist->p_input = NULL;
408 vlc_object_release( p_input );
411 else if( p_playlist->p_input->b_die )
413 /* This input is dying, leave it alone */
416 else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
418 input_StopThread( p_playlist->p_input );
424 p_playlist->p_input->b_eof = 1;
428 msleep( INTF_IDLE_SLEEP );
432 /* close all remaining sout */
433 while( ( p_obj = vlc_object_find( p_playlist,
434 VLC_OBJECT_SOUT, FIND_CHILD ) ) )
436 vlc_object_detach( p_obj );
437 vlc_object_release( p_obj );
438 sout_DeleteInstance( (sout_instance_t*)p_obj );
442 /* close all remaining vout */
443 while( ( p_obj = vlc_object_find( p_playlist,
444 VLC_OBJECT_VOUT, FIND_CHILD ) ) )
446 vlc_object_detach( p_obj );
447 vlc_object_release( p_obj );
448 vout_Destroy( (vout_thread_t *)p_obj );
451 while( p_playlist->i_sds )
453 playlist_ServicesDiscoveryRemove( p_playlist,
454 p_playlist->pp_sds[0]->p_sd->psz_module );
457 playlist_MLDump( p_playlist );
460 FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
461 free( p_del->pp_children );
462 vlc_gc_decref( p_del->p_input );
465 ARRAY_RESET( p_playlist->all_items );
467 ARRAY_RESET( p_playlist->items );
468 ARRAY_RESET( p_playlist->current );
476 * Main loop for preparser queue
477 * \param p_obj items to preparse
480 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
482 playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
483 input_item_t *p_current;
486 vlc_object_lock( p_obj );
488 while( vlc_object_alive( p_obj ) )
490 while( p_obj->i_waiting == 0 )
492 if( vlc_object_wait( p_obj ) || p_playlist->b_die )
494 vlc_object_unlock( p_obj );
499 p_current = p_obj->pp_waiting[0];
500 REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
501 vlc_object_unlock( p_obj );
506 if( p_current->i_type == ITEM_TYPE_FILE )
508 stats_TimerStart( p_playlist, "Preparse run",
509 STATS_TIMER_PREPARSE );
510 /* Do not preparse if it is already done (like by playing it) */
511 if( !input_item_IsPreparsed( p_current ) )
514 input_Preparse( p_playlist, p_current );
517 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
519 input_item_SetPreparsed( p_current, true );
520 var_SetInteger( p_playlist, "item-change", p_current->i_id );
523 /* If we haven't retrieved enough meta, add to secondary queue
524 * which will run the "meta fetchers".
525 * This only checks for meta, not for art
526 * \todo don't do this for things we won't get meta for, like vids
528 char *psz_arturl = input_item_GetArtURL( p_current );
529 char *psz_name = input_item_GetName( p_current );
530 if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
531 ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
533 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
534 vlc_object_lock( p_playlist->p_fetcher );
535 INSERT_ELEM( p_playlist->p_fetcher->pp_waiting,
536 p_playlist->p_fetcher->i_waiting,
537 p_playlist->p_fetcher->i_waiting, p_current);
538 vlc_object_signal_unlocked( p_playlist->p_fetcher );
539 vlc_object_unlock( p_playlist->p_fetcher );
543 PL_DEBUG( "no fetch required for %s (art currently %s)",
544 psz_name, psz_arturl );
545 vlc_gc_decref( p_current );
554 vlc_object_lock( p_obj );
555 i_activity = var_GetInteger( p_playlist, "activity" );
556 if( i_activity < 0 ) i_activity = 0;
557 vlc_object_unlock( p_obj );
558 /* Sleep at least 1ms */
559 msleep( (i_activity+1) * 1000 );
560 vlc_object_lock( p_obj );
562 vlc_object_unlock( p_obj );
568 * Main loop for secondary preparser queue
569 * \param p_obj items to preparse
572 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
574 playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
575 input_item_t *p_item;
578 vlc_mutex_lock( &p_obj->object_lock );
580 while( vlc_object_alive( p_obj ) )
582 while( p_obj->i_waiting == 0 )
584 if( vlc_object_wait( p_obj ) || p_playlist->b_die )
586 vlc_mutex_unlock( &p_obj->object_lock );
591 p_item = p_obj->pp_waiting[0];
592 REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
593 vlc_mutex_unlock( &p_obj->object_lock );
598 /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
599 * (This can happen if we fetch art on play)
600 * FIXME this doesn't work if we need to fetch meta before art ... */
601 for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
605 b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item ||
606 p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
613 i_ret = input_ArtFind( p_playlist, p_item );
616 PL_DEBUG( "downloading art for %s", p_item->psz_name );
617 if( input_DownloadAndCacheArt( p_playlist, p_item ) )
618 input_item_SetArtNotFound( p_item, true );
620 input_item_SetArtFetched( p_item, true );
621 var_SetInteger( p_playlist, "item-change",
625 else if( i_ret == 0 ) /* Was in cache */
627 PL_DEBUG( "found art for %s in cache", p_item->psz_name );
628 input_item_SetArtFetched( p_item, true );
629 var_SetInteger( p_playlist, "item-change", p_item->i_id );
633 PL_DEBUG( "art not found for %s", p_item->psz_name );
634 input_item_SetArtNotFound( p_item, true );
636 vlc_gc_decref( p_item );
638 vlc_object_lock( p_obj );
639 i_activity = var_GetInteger( p_playlist, "activity" );
640 if( i_activity < 0 ) i_activity = 0;
641 vlc_object_unlock( p_obj );
642 /* Sleep at least 1ms */
643 msleep( (i_activity+1) * 1000 );
644 vlc_mutex_lock( &p_obj->object_lock );
646 vlc_mutex_unlock( &p_obj->object_lock );
649 static void VariablesInit( playlist_t *p_playlist )
652 /* These variables control updates */
653 var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
655 var_Set( p_playlist, "intf-change", val );
657 var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
659 var_Set( p_playlist, "item-change", val );
661 var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
663 var_Set( p_playlist, "item-deleted", val );
665 var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
667 var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
669 var_Set( p_playlist, "playlist-current", val );
671 var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
673 var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
675 var_Set( p_playlist, "intf-show", val );
677 var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
678 var_SetInteger( p_playlist, "activity", 0 );
680 /* Variables to control playback */
681 var_CreateGetBool( p_playlist, "play-and-stop" );
682 var_CreateGetBool( p_playlist, "play-and-exit" );
683 var_CreateGetBool( p_playlist, "random" );
684 var_CreateGetBool( p_playlist, "repeat" );
685 var_CreateGetBool( p_playlist, "loop" );
687 var_AddCallback( p_playlist, "random", RandomCallback, NULL );