git.sesse.net Git - vlc/blob - 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  *          Clément 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     pl_priv((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     playlist_private_t *p;
  65
  66     /* Allocate structure */
  67     p = vlc_custom_create( p_parent, sizeof( *p ),
  68                            VLC_OBJECT_GENERIC, playlist_name );
  69     if( !p )
  70         return NULL;
  71
  72     assert( offsetof( playlist_private_t, public_data ) == 0 );
  73     p_playlist = &p->public_data;
  74     TAB_INIT( pl_priv(p_playlist)->i_sds, pl_priv(p_playlist)->pp_sds );
  75
  76     libvlc_priv(p_parent->p_libvlc)->p_playlist = p_playlist;
  77
  78     VariablesInit( p_playlist );
  79
  80     /* Initialise data structures */
  81     pl_priv(p_playlist)->i_last_playlist_id = 0;
  82     pl_priv(p_playlist)->p_input = NULL;
  83
  84     pl_priv(p_playlist)->gc_date = 0;
  85     pl_priv(p_playlist)->b_cant_sleep = false;
  86
  87     ARRAY_INIT( p_playlist->items );
  88     ARRAY_INIT( p_playlist->all_items );
  89     ARRAY_INIT( pl_priv(p_playlist)->items_to_delete );
  90     ARRAY_INIT( p_playlist->current );
  91
  92     p_playlist->i_current_index = 0;
  93     pl_priv(p_playlist)->b_reset_currently_playing = true;
  94     pl_priv(p_playlist)->last_rebuild_date = 0;
  95
  96     pl_priv(p_playlist)->b_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  97
  98     pl_priv(p_playlist)->b_doing_ml = false;
  99
 100     pl_priv(p_playlist)->b_auto_preparse =
 101                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
 102
 103     PL_LOCK; /* playlist_NodeCreate will check for it */
 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     PL_UNLOCK;
 109
 110     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 111         return NULL;
 112
 113     /* Create playlist and media library */
 114     PL_LOCK; /* playlist_NodesPairCreate will check for it */
 115     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 116                             &p_playlist->p_local_category,
 117                             &p_playlist->p_local_onelevel, false );
 118     PL_UNLOCK;
 119
 120     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 121     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 122
 123     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 124         !p_playlist->p_local_category->p_input ||
 125         !p_playlist->p_local_onelevel->p_input )
 126         return NULL;
 127
 128     if( config_GetInt( p_playlist, "media-library") )
 129     {
 130         PL_LOCK; /* playlist_NodesPairCreate will check for it */
 131         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 132                             &p_playlist->p_ml_category,
 133                             &p_playlist->p_ml_onelevel, false );
 134         PL_UNLOCK;
 135
 136         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 137             return NULL;
 138
 139         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 140         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 141     }
 142     else
 143     {
 144         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 145     }
 146
 147     /* Initial status */
 148     pl_priv(p_playlist)->status.p_item = NULL;
 149     pl_priv(p_playlist)->status.p_node = p_playlist->p_local_onelevel;
 150     pl_priv(p_playlist)->request.b_request = false;
 151     pl_priv(p_playlist)->status.i_status = PLAYLIST_STOPPED;
 152
 153     pl_priv(p_playlist)->b_auto_preparse = false;
 154     playlist_MLLoad( p_playlist );
 155     pl_priv(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
 170 static void playlist_Destructor( vlc_object_t * p_this )
 171 {
 172     playlist_t * p_playlist = (playlist_t *)p_this;
 173
 174     /* Destroy the item preparser */
 175     playlist_preparse_t *p_preparse = &pl_priv(p_playlist)->preparse;
 176     if (p_preparse->up)
 177     {
 178         vlc_cancel (p_preparse->thread);
 179         vlc_join (p_preparse->thread, NULL);
 180     }
 181     while (p_preparse->i_waiting > 0)
 182     {   /* Any left-over unparsed item? */
 183         vlc_gc_decref (p_preparse->pp_waiting[0]);
 184         REMOVE_ELEM (p_preparse->pp_waiting, p_preparse->i_waiting, 0);
 185     }
 186     vlc_cond_destroy (&p_preparse->wait);
 187     vlc_mutex_destroy (&p_preparse->lock);
 188
 189     /* Destroy the item meta-infos fetcher */
 190     playlist_fetcher_t *p_fetcher = &pl_priv(p_playlist)->fetcher;
 191     if (p_fetcher->up)
 192     {
 193         vlc_cancel (p_fetcher->thread);
 194         vlc_join (p_fetcher->thread, NULL);
 195     }
 196     while (p_fetcher->i_waiting > 0)
 197     {   /* Any left-over unparsed item? */
 198         vlc_gc_decref (p_fetcher->pp_waiting[0]);
 199         REMOVE_ELEM (p_fetcher->pp_waiting, p_fetcher->i_waiting, 0);
 200     }
 201     vlc_cond_destroy (&p_fetcher->wait);
 202     vlc_mutex_destroy (&p_fetcher->lock);
 203
 204     msg_Dbg( p_this, "Destroyed" );
 205 }
 206
 207 /* Destroy remaining objects */
 208 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
 209 {
 210     if( !b_force )
 211     {
 212         if( mdate() - pl_priv(p_playlist)->gc_date < 1000000 )
 213         {
 214            pl_priv(p_playlist)->b_cant_sleep = true;
 215             return;
 216         }
 217         else if( pl_priv(p_playlist)->gc_date == 0 )
 218             return;
 219     }
 220
 221     pl_priv(p_playlist)->b_cant_sleep = false;
 222 }
 223
 224 /* Input Callback */
 225 static int InputEvent( vlc_object_t *p_this, char const *psz_cmd,
 226                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 227 {
 228     VLC_UNUSED(p_this); VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
 229     playlist_t *p_playlist = p_data;
 230
 231     if( newval.i_int == INPUT_EVENT_STATE )
 232     {
 233         playlist_Signal( p_playlist );
 234     }
 235     else if( newval.i_int == INPUT_EVENT_ES )
 236     {
 237         PL_LOCK;
 238         pl_priv(p_playlist)->gc_date = mdate();
 239         vlc_object_signal_unlocked( p_playlist );
 240         PL_UNLOCK;
 241     }
 242     return VLC_SUCCESS;
 243 }
 244
 245 /* Internals */
 246 void playlist_release_current_input( playlist_t * p_playlist )
 247 {
 248     PL_ASSERT_LOCKED;
 249
 250     if( !pl_priv(p_playlist)->p_input ) return;
 251
 252     input_thread_t * p_input = pl_priv(p_playlist)->p_input;
 253
 254     var_DelCallback( p_input, "intf-event", InputEvent, p_playlist );
 255     pl_priv(p_playlist)->p_input = NULL;
 256
 257     /* Release the playlist lock, because we may get stuck
 258      * in vlc_object_release() for some time. */
 259     PL_UNLOCK;
 260     vlc_thread_join( p_input );
 261     vlc_object_release( p_input );
 262     PL_LOCK;
 263 }
 264
 265 void playlist_set_current_input(
 266     playlist_t * p_playlist, input_thread_t * p_input )
 267 {
 268     PL_ASSERT_LOCKED;
 269
 270     playlist_release_current_input( p_playlist );
 271
 272     if( p_input )
 273     {
 274         vlc_object_hold( p_input );
 275         pl_priv(p_playlist)->p_input = p_input;
 276
 277         var_AddCallback( p_input, "intf-event", InputEvent, p_playlist );
 278     }
 279 }
 280
 281 /** Get current playing input.
 282  */
 283 input_thread_t * playlist_CurrentInput( playlist_t * p_playlist )
 284 {
 285     input_thread_t * p_input;
 286     PL_LOCK;
 287     p_input = pl_priv(p_playlist)->p_input;
 288     if( p_input ) vlc_object_hold( p_input );
 289     PL_UNLOCK;
 290     return p_input;
 291 }
 292
 293 /**
 294  * @}
 295  */
 296
 297 /** Accessor for status item and status nodes.
 298  */
 299 playlist_item_t * get_current_status_item( playlist_t * p_playlist )
 300 {
 301     PL_ASSERT_LOCKED;
 302
 303     return pl_priv(p_playlist)->status.p_item;
 304 }
 305
 306 playlist_item_t * get_current_status_node( playlist_t * p_playlist )
 307 {
 308     PL_ASSERT_LOCKED;
 309
 310     return pl_priv(p_playlist)->status.p_node;
 311 }
 312
 313 void set_current_status_item( playlist_t * p_playlist,
 314     playlist_item_t * p_item )
 315 {
 316     PL_ASSERT_LOCKED;
 317
 318     if( pl_priv(p_playlist)->status.p_item &&
 319         pl_priv(p_playlist)->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG &&
 320         pl_priv(p_playlist)->status.p_item != p_item )
 321     {
 322         /* It's unsafe given current design to delete a playlist item :(
 323         playlist_ItemDelete( pl_priv(p_playlist)->status.p_item ); */
 324     }
 325     pl_priv(p_playlist)->status.p_item = p_item;
 326 }
 327
 328 void set_current_status_node( playlist_t * p_playlist,
 329     playlist_item_t * p_node )
 330 {
 331     PL_ASSERT_LOCKED;
 332
 333     if( pl_priv(p_playlist)->status.p_node &&
 334         pl_priv(p_playlist)->status.p_node->i_flags & PLAYLIST_REMOVE_FLAG &&
 335         pl_priv(p_playlist)->status.p_node != p_node )
 336     {
 337         /* It's unsafe given current design to delete a playlist item :(
 338         playlist_ItemDelete( pl_priv(p_playlist)->status.p_node ); */
 339     }
 340     pl_priv(p_playlist)->status.p_node = p_node;
 341 }
 342
 343 /**
 344  * Main loop
 345  *
 346  * Main loop for the playlist. It should be entered with the
 347  * playlist lock (otherwise input event may be lost)
 348  * \param p_playlist the playlist object
 349  * \return nothing
 350  */
 351 void playlist_MainLoop( playlist_t *p_playlist )
 352 {
 353     playlist_item_t *p_item = NULL;
 354     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 355
 356     PL_ASSERT_LOCKED;
 357
 358     if( pl_priv(p_playlist)->b_reset_currently_playing &&
 359         mdate() - pl_priv(p_playlist)->last_rebuild_date > 30000 ) // 30 ms
 360     {
 361         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 362                                get_current_status_item( p_playlist ) );
 363         pl_priv(p_playlist)->last_rebuild_date = mdate();
 364     }
 365
 366 check_input:
 367     /* If there is an input, check that it doesn't need to die. */
 368     if( pl_priv(p_playlist)->p_input )
 369     {
 370         if( pl_priv(p_playlist)->request.b_request && !pl_priv(p_playlist)->p_input->b_die )
 371         {
 372             PL_DEBUG( "incoming request - stopping current input" );
 373             input_StopThread( pl_priv(p_playlist)->p_input );
 374         }
 375
 376         /* This input is dead. Remove it ! */
 377         if( pl_priv(p_playlist)->p_input->b_dead )
 378         {
 379             int i_activity;
 380             input_thread_t *p_input;
 381             sout_instance_t **pp_sout = &pl_priv(p_playlist)->p_sout;
 382
 383             PL_DEBUG( "dead input" );
 384
 385             p_input = pl_priv(p_playlist)->p_input;
 386
 387             assert( *pp_sout == NULL );
 388             if( var_CreateGetBool( p_input, "sout-keep" ) )
 389                 *pp_sout = input_DetachSout( p_input );
 390
 391             /* Destroy input */
 392             playlist_release_current_input( p_playlist );
 393
 394             pl_priv(p_playlist)->gc_date = mdate();
 395             pl_priv(p_playlist)->b_cant_sleep = true;
 396
 397             i_activity= var_GetInteger( p_playlist, "activity" );
 398             var_SetInteger( p_playlist, "activity", i_activity -
 399                             DEFAULT_INPUT_ACTIVITY );
 400
 401             goto check_input;
 402         }
 403         /* This input is dying, let it do */
 404         else if( pl_priv(p_playlist)->p_input->b_die )
 405         {
 406             PL_DEBUG( "dying input" );
 407             PL_UNLOCK;
 408             msleep( INTF_IDLE_SLEEP );
 409             PL_LOCK;
 410             goto check_input;
 411         }
 412         /* This input has finished, ask it to die ! */
 413         else if( pl_priv(p_playlist)->p_input->b_error
 414                   || pl_priv(p_playlist)->p_input->b_eof )
 415         {
 416             PL_DEBUG( "finished input" );
 417             input_StopThread( pl_priv(p_playlist)->p_input );
 418             /* No need to wait here, we'll wait in the p_input->b_die case */
 419             goto check_input;
 420         }
 421         else if( pl_priv(p_playlist)->p_input->i_state != INIT_S )
 422         {
 423             ObjectGarbageCollector( p_playlist, false );
 424         }
 425     }
 426     else
 427     {
 428         /* No input. Several cases
 429          *  - No request, running status -> start new item
 430          *  - No request, stopped status -> collect garbage
 431          *  - Request, running requested -> start new item
 432          *  - Request, stopped requested -> collect garbage
 433         */
 434         int i_status = pl_priv(p_playlist)->request.b_request ?
 435             pl_priv(p_playlist)->request.i_status : pl_priv(p_playlist)->status.i_status;
 436         if( i_status != PLAYLIST_STOPPED )
 437         {
 438             msg_Dbg( p_playlist, "starting new item" );
 439             p_item = playlist_NextItem( p_playlist );
 440
 441             if( p_item == NULL )
 442             {
 443                 msg_Dbg( p_playlist, "nothing to play" );
 444                 pl_priv(p_playlist)->status.i_status = PLAYLIST_STOPPED;
 445
 446                 if( b_playexit == true )
 447                 {
 448                     msg_Info( p_playlist, "end of playlist, exiting" );
 449                     vlc_object_kill( p_playlist->p_libvlc );
 450                 }
 451                 ObjectGarbageCollector( p_playlist, true );
 452                 return;
 453             }
 454             playlist_PlayItem( p_playlist, p_item );
 455             /* playlist_PlayItem loose input event, we need to recheck */
 456             goto check_input;
 457         }
 458         else
 459         {
 460             const bool b_gc_forced = pl_priv(p_playlist)->status.i_status != PLAYLIST_STOPPED;
 461
 462             pl_priv(p_playlist)->status.i_status = PLAYLIST_STOPPED;
 463
 464             /* Collect garbage */
 465             ObjectGarbageCollector( p_playlist, b_gc_forced );
 466         }
 467     }
 468 }
 469
 470 /**
 471  * Last loop
 472  *
 473  * The playlist is dying so do the last loop
 474  * \param p_playlist the playlist object
 475  * \return nothing
 476 */
 477 void playlist_LastLoop( playlist_t *p_playlist )
 478 {
 479     /* If there is an input, kill it */
 480     while( 1 )
 481     {
 482         PL_LOCK;
 483         if( pl_priv(p_playlist)->p_input == NULL )
 484         {
 485             PL_UNLOCK;
 486             break;
 487         }
 488
 489         if( pl_priv(p_playlist)->p_input->b_dead )
 490         {
 491             /* remove input */
 492             playlist_release_current_input( p_playlist );
 493
 494             /* sout-keep: no need to anything here.
 495              * The last input will destroy its sout, if any, by itself */
 496
 497             PL_UNLOCK;
 498             continue;
 499         }
 500         else if( pl_priv(p_playlist)->p_input->b_die )
 501         {
 502             /* This input is dying, leave it alone */
 503             ;
 504         }
 505         else if( pl_priv(p_playlist)->p_input->b_error || pl_priv(p_playlist)->p_input->b_eof )
 506         {
 507             input_StopThread( pl_priv(p_playlist)->p_input );
 508             PL_UNLOCK;
 509             continue;
 510         }
 511         else
 512         {
 513             pl_priv(p_playlist)->p_input->b_eof = 1;
 514         }
 515         PL_UNLOCK;
 516
 517         msleep( INTF_IDLE_SLEEP );
 518     }
 519
 520 #ifdef ENABLE_SOUT
 521     /* close the remaining sout-keep (if there was no input atm) */
 522     sout_instance_t *p_sout = pl_priv(p_playlist)->p_sout;
 523     if (p_sout)
 524         sout_DeleteInstance( p_sout );
 525 #endif
 526
 527     /* Core should have terminated all SDs before the playlist */
 528     /* TODO: It fails to do so when not playing anything -- Courmisch */
 529     playlist_ServicesDiscoveryKillAll( p_playlist );
 530     playlist_MLDump( p_playlist );
 531
 532     PL_LOCK;
 533
 534     /* Release the current node */
 535     set_current_status_node( p_playlist, NULL );
 536
 537     /* Release the current item */
 538     set_current_status_item( p_playlist, NULL );
 539
 540     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 541         free( p_del->pp_children );
 542         vlc_gc_decref( p_del->p_input );
 543         free( p_del );
 544     FOREACH_END();
 545     ARRAY_RESET( p_playlist->all_items );
 546     FOREACH_ARRAY( playlist_item_t *p_del, pl_priv(p_playlist)->items_to_delete )
 547         free( p_del->pp_children );
 548         vlc_gc_decref( p_del->p_input );
 549         free( p_del );
 550     FOREACH_END();
 551     ARRAY_RESET( pl_priv(p_playlist)->items_to_delete );
 552
 553     ARRAY_RESET( p_playlist->items );
 554     ARRAY_RESET( p_playlist->current );
 555
 556     PL_UNLOCK;
 557 }
 558
 559 /**
 560  * Preparse queue loop
 561  *
 562  * @param p_obj preparse structure
 563  * @return never
 564  */
 565 void *playlist_PreparseLoop( void *data )
 566 {
 567     playlist_preparse_t *p_preparse = data;
 568     playlist_t *p_playlist = &((playlist_private_t *)(((char *)p_preparse)
 569              - offsetof(playlist_private_t, preparse)))->public_data;
 570
 571     for( ;; )
 572     {
 573         input_item_t *p_current;
 574
 575         vlc_mutex_lock( &p_preparse->lock );
 576         mutex_cleanup_push( &p_preparse->lock );
 577
 578         while( p_preparse->i_waiting == 0 )
 579             vlc_cond_wait( &p_preparse->wait, &p_preparse->lock );
 580
 581         p_current = p_preparse->pp_waiting[0];
 582         REMOVE_ELEM( p_preparse->pp_waiting, p_preparse->i_waiting, 0 );
 583         vlc_cleanup_run( );
 584
 585         if( p_current )
 586         {
 587             int canc = vlc_savecancel ();
 588             PL_LOCK;
 589             if( p_current->i_type == ITEM_TYPE_FILE )
 590             {
 591                 stats_TimerStart( p_playlist, "Preparse run",
 592                                   STATS_TIMER_PREPARSE );
 593                 /* Do not preparse if it is already done (like by playing it) */
 594                 if( !input_item_IsPreparsed( p_current ) )
 595                 {
 596                     PL_UNLOCK;
 597                     input_Preparse( p_playlist, p_current );
 598                     PL_LOCK;
 599                 }
 600                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 601                 PL_UNLOCK;
 602                 input_item_SetPreparsed( p_current, true );
 603                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 604                 PL_LOCK;
 605             }
 606             /* If we haven't retrieved enough meta, add to secondary queue
 607              * which will run the "meta fetchers".
 608              * This only checks for meta, not for art
 609              * \todo don't do this for things we won't get meta for, like vids
 610              */
 611             char *psz_arturl = input_item_GetArtURL( p_current );
 612             char *psz_name = input_item_GetName( p_current );
 613             playlist_fetcher_t *p_fetcher = &pl_priv(p_playlist)->fetcher;
 614             if( p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 615                 ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 616             {
 617                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 618                 vlc_mutex_lock( &p_fetcher->lock );
 619                 INSERT_ELEM( p_fetcher->pp_waiting, p_fetcher->i_waiting,
 620                              p_fetcher->i_waiting, p_current);
 621                 vlc_cond_signal( &p_fetcher->wait );
 622                 vlc_mutex_unlock( &p_fetcher->lock );
 623             }
 624             else
 625             {
 626                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 627                           psz_name, psz_arturl );
 628                 vlc_gc_decref( p_current );
 629             }
 630             free( psz_name );
 631             free( psz_arturl );
 632             PL_UNLOCK;
 633             vlc_restorecancel( canc );
 634         }
 635
 636         int i_activity = var_GetInteger( p_playlist, "activity" );
 637         if( i_activity < 0 ) i_activity = 0;
 638         /* Sleep at least 1ms */
 639         msleep( (i_activity+1) * 1000 );
 640     }
 641
 642     assert( 0 );
 643     return NULL;
 644 }
 645
 646 /**
 647  * Fetcher loop
 648  *
 649  * \return never
 650  */
 651 void *playlist_FetcherLoop( void *data )
 652 {
 653     playlist_fetcher_t *p_fetcher = data;
 654     playlist_t *p_playlist = &((playlist_private_t *)(((char *)p_fetcher)
 655              - offsetof(playlist_private_t, fetcher)))->public_data;
 656
 657     for( ;; )
 658     {
 659         input_item_t *p_item;
 660
 661         vlc_mutex_lock( &p_fetcher->lock );
 662         mutex_cleanup_push( &p_fetcher->lock );
 663
 664         while( p_fetcher->i_waiting == 0 )
 665             vlc_cond_wait( &p_fetcher->wait, &p_fetcher->lock );
 666
 667         p_item = p_fetcher->pp_waiting[0];
 668         REMOVE_ELEM( p_fetcher->pp_waiting, p_fetcher->i_waiting, 0 );
 669         vlc_cleanup_run( );
 670
 671         int canc = vlc_savecancel();
 672         if( p_item )
 673         {
 674             int i_ret;
 675
 676             /* Check if it is not yet preparsed and if so wait for it
 677              * (at most 0.5s)
 678              * (This can happen if we fetch art on play)
 679              * FIXME this doesn't work if we need to fetch meta before art...
 680              */
 681             for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 682             {
 683                 bool b_break;
 684                 PL_LOCK;
 685                 b_break = ( !pl_priv(p_playlist)->p_input || input_GetItem(pl_priv(p_playlist)->p_input) != p_item  ||
 686                             pl_priv(p_playlist)->p_input->b_die || pl_priv(p_playlist)->p_input->b_eof || pl_priv(p_playlist)->p_input->b_error );
 687                 PL_UNLOCK;
 688                 if( b_break )
 689                     break;
 690                 msleep( 50000 );
 691             }
 692
 693             i_ret = input_ArtFind( p_playlist, p_item );
 694             if( i_ret == 1 )
 695             {
 696                 PL_DEBUG( "downloading art for %s", p_item->psz_name );
 697                 if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 698                     input_item_SetArtNotFound( p_item, true );
 699                 else {
 700                     input_item_SetArtFetched( p_item, true );
 701                     var_SetInteger( p_playlist, "item-change",
 702                                     p_item->i_id );
 703                 }
 704             }
 705             else if( i_ret == 0 ) /* Was in cache */
 706             {
 707                 PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 708                 input_item_SetArtFetched( p_item, true );
 709                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 710             }
 711             else
 712             {
 713                 PL_DEBUG( "art not found for %s", p_item->psz_name );
 714                 input_item_SetArtNotFound( p_item, true );
 715             }
 716             vlc_gc_decref( p_item );
 717         }
 718         vlc_restorecancel( canc );
 719
 720         int i_activity = var_GetInteger( p_playlist, "activity" );
 721         if( i_activity < 0 ) i_activity = 0;
 722         /* Sleep at least 1ms */
 723         msleep( (i_activity+1) * 1000 );
 724     }
 725
 726     assert( 0 );
 727     return NULL;
 728 }
 729
 730 static void VariablesInit( playlist_t *p_playlist )
 731 {
 732     vlc_value_t val;
 733     /* These variables control updates */
 734     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 735     val.b_bool = true;
 736     var_Set( p_playlist, "intf-change", val );
 737
 738     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 739     val.i_int = -1;
 740     var_Set( p_playlist, "item-change", val );
 741
 742     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 743     val.i_int = -1;
 744     var_Set( p_playlist, "item-deleted", val );
 745
 746     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 747
 748     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 749     val.i_int = -1;
 750     var_Set( p_playlist, "playlist-current", val );
 751
 752     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 753     var_SetInteger( p_playlist, "activity", 0 );
 754
 755     /* Variables to control playback */
 756     var_Create( p_playlist, "play-and-stop", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 757     var_Create( p_playlist, "play-and-exit", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 758     var_Create( p_playlist, "random", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 759     var_Create( p_playlist, "repeat", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 760     var_Create( p_playlist, "loop", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 761
 762     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 763 }
 764
 765 int playlist_CurrentId( playlist_t * p_playlist )
 766 {
 767     return pl_priv(p_playlist)->status.p_item->i_id;
 768 }
 769
 770 bool playlist_IsPlaying( playlist_t * p_playlist )
 771 {
 772     return ( pl_priv(p_playlist)->status.i_status == PLAYLIST_RUNNING &&
 773             !(pl_priv(p_playlist)->request.b_request && pl_priv(p_playlist)->request.i_status == PLAYLIST_STOPPED) );
 774 }
 775
 776 playlist_item_t * playlist_CurrentPlayingItem( playlist_t * p_playlist )
 777 {
 778     return pl_priv(p_playlist)->status.p_item;
 779 }
 780
 781 int playlist_Status( playlist_t * p_playlist )
 782 {
 783     return pl_priv(p_playlist)->status.i_status;
 784 }