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     playlist_t *p_playlist = (playlist_t*)p_this;
  48
  49     PL_LOCK;
  50
  51     pl_priv(p_playlist)->b_reset_currently_playing = true;
  52     vlc_object_signal_unlocked( p_playlist );
  53
  54     PL_UNLOCK;
  55     return VLC_SUCCESS;
  56 }
  57
  58 /**
  59  * Create playlist
  60  *
  61  * Create a playlist structure.
  62  * \param p_parent the vlc object that is to be the parent of this playlist
  63  * \return a pointer to the created playlist, or NULL on error
  64  */
  65 playlist_t * playlist_Create( vlc_object_t *p_parent )
  66 {
  67     static const char playlist_name[] = "playlist";
  68     playlist_t *p_playlist;
  69     playlist_private_t *p;
  70
  71     /* Allocate structure */
  72     p = vlc_custom_create( p_parent, sizeof( *p ),
  73                            VLC_OBJECT_GENERIC, playlist_name );
  74     if( !p )
  75         return NULL;
  76
  77     assert( offsetof( playlist_private_t, public_data ) == 0 );
  78     p_playlist = &p->public_data;
  79     TAB_INIT( pl_priv(p_playlist)->i_sds, pl_priv(p_playlist)->pp_sds );
  80
  81     libvlc_priv(p_parent->p_libvlc)->p_playlist = p_playlist;
  82
  83     VariablesInit( p_playlist );
  84
  85     /* Initialise data structures */
  86     pl_priv(p_playlist)->i_last_playlist_id = 0;
  87     pl_priv(p_playlist)->p_input = NULL;
  88
  89     pl_priv(p_playlist)->gc_date = 0;
  90     pl_priv(p_playlist)->b_cant_sleep = false;
  91
  92     ARRAY_INIT( p_playlist->items );
  93     ARRAY_INIT( p_playlist->all_items );
  94     ARRAY_INIT( pl_priv(p_playlist)->items_to_delete );
  95     ARRAY_INIT( p_playlist->current );
  96
  97     p_playlist->i_current_index = 0;
  98     pl_priv(p_playlist)->b_reset_currently_playing = true;
  99     pl_priv(p_playlist)->last_rebuild_date = 0;
 100
 101     pl_priv(p_playlist)->b_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
 102
 103     pl_priv(p_playlist)->b_doing_ml = false;
 104
 105     pl_priv(p_playlist)->b_auto_preparse =
 106                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
 107
 108     PL_LOCK; /* playlist_NodeCreate will check for it */
 109     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 110                                     0, NULL );
 111     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 112                                     0, p_playlist->p_root_category->p_input );
 113     PL_UNLOCK;
 114
 115     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 116         return NULL;
 117
 118     /* Create playlist and media library */
 119     PL_LOCK; /* playlist_NodesPairCreate will check for it */
 120     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 121                             &p_playlist->p_local_category,
 122                             &p_playlist->p_local_onelevel, false );
 123     PL_UNLOCK;
 124
 125     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 126     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 127
 128     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 129         !p_playlist->p_local_category->p_input ||
 130         !p_playlist->p_local_onelevel->p_input )
 131         return NULL;
 132
 133     if( config_GetInt( p_playlist, "media-library") )
 134     {
 135         PL_LOCK; /* playlist_NodesPairCreate will check for it */
 136         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 137                             &p_playlist->p_ml_category,
 138                             &p_playlist->p_ml_onelevel, false );
 139         PL_UNLOCK;
 140
 141         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 142             return NULL;
 143
 144         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 145         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 146     }
 147     else
 148     {
 149         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 150     }
 151
 152     /* Initial status */
 153     pl_priv(p_playlist)->status.p_item = NULL;
 154     pl_priv(p_playlist)->status.p_node = p_playlist->p_local_onelevel;
 155     pl_priv(p_playlist)->request.b_request = false;
 156     pl_priv(p_playlist)->status.i_status = PLAYLIST_STOPPED;
 157
 158     pl_priv(p_playlist)->b_auto_preparse = false;
 159     playlist_MLLoad( p_playlist );
 160     pl_priv(p_playlist)->b_auto_preparse = true;
 161
 162     vlc_object_set_destructor( p_playlist, playlist_Destructor );
 163
 164     return p_playlist;
 165 }
 166
 167 /**
 168  * Destroy playlist
 169  *
 170  * Destroy a playlist structure.
 171  * \param p_playlist the playlist object
 172  * \return nothing
 173  */
 174
 175 static void playlist_Destructor( vlc_object_t * p_this )
 176 {
 177     playlist_t * p_playlist = (playlist_t *)p_this;
 178
 179     /* Destroy the item preparser */
 180     playlist_preparse_t *p_preparse = &pl_priv(p_playlist)->preparse;
 181     if (p_preparse->up)
 182     {
 183         vlc_cancel (p_preparse->thread);
 184         vlc_join (p_preparse->thread, NULL);
 185     }
 186     while (p_preparse->i_waiting > 0)
 187     {   /* Any left-over unparsed item? */
 188         vlc_gc_decref (p_preparse->pp_waiting[0]);
 189         REMOVE_ELEM (p_preparse->pp_waiting, p_preparse->i_waiting, 0);
 190     }
 191     vlc_cond_destroy (&p_preparse->wait);
 192     vlc_mutex_destroy (&p_preparse->lock);
 193
 194     /* Destroy the item meta-infos fetcher */
 195     playlist_fetcher_t *p_fetcher = &pl_priv(p_playlist)->fetcher;
 196     if (p_fetcher->up)
 197     {
 198         vlc_cancel (p_fetcher->thread);
 199         vlc_join (p_fetcher->thread, NULL);
 200     }
 201     while (p_fetcher->i_waiting > 0)
 202     {   /* Any left-over unparsed item? */
 203         vlc_gc_decref (p_fetcher->pp_waiting[0]);
 204         REMOVE_ELEM (p_fetcher->pp_waiting, p_fetcher->i_waiting, 0);
 205     }
 206     vlc_cond_destroy (&p_fetcher->wait);
 207     vlc_mutex_destroy (&p_fetcher->lock);
 208
 209     msg_Dbg( p_this, "Destroyed" );
 210 }
 211
 212 /* Destroy remaining objects */
 213 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
 214 {
 215     if( !b_force )
 216     {
 217         if( mdate() - pl_priv(p_playlist)->gc_date < 1000000 )
 218         {
 219            pl_priv(p_playlist)->b_cant_sleep = true;
 220             return;
 221         }
 222         else if( pl_priv(p_playlist)->gc_date == 0 )
 223             return;
 224     }
 225
 226     pl_priv(p_playlist)->b_cant_sleep = false;
 227 }
 228
 229 /* Input Callback */
 230 static int InputEvent( vlc_object_t *p_this, char const *psz_cmd,
 231                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 232 {
 233     VLC_UNUSED(p_this); VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
 234     playlist_t *p_playlist = p_data;
 235
 236     if( newval.i_int != INPUT_EVENT_STATE &&
 237         newval.i_int != INPUT_EVENT_ES )
 238         return VLC_SUCCESS;
 239
 240     PL_LOCK;
 241
 242     if( newval.i_int == INPUT_EVENT_ES )
 243         pl_priv(p_playlist)->gc_date = mdate();
 244
 245     vlc_object_signal_unlocked( p_playlist );
 246
 247     PL_UNLOCK;
 248     return VLC_SUCCESS;
 249 }
 250
 251 /* Internals */
 252 void playlist_release_current_input( playlist_t * p_playlist )
 253 {
 254     PL_ASSERT_LOCKED;
 255
 256     if( !pl_priv(p_playlist)->p_input ) return;
 257
 258     input_thread_t * p_input = pl_priv(p_playlist)->p_input;
 259
 260     var_DelCallback( p_input, "intf-event", InputEvent, p_playlist );
 261     pl_priv(p_playlist)->p_input = NULL;
 262
 263     /* Release the playlist lock, because we may get stuck
 264      * in vlc_object_release() for some time. */
 265     PL_UNLOCK;
 266     vlc_thread_join( p_input );
 267     vlc_object_release( p_input );
 268     PL_LOCK;
 269 }
 270
 271 void playlist_set_current_input(
 272     playlist_t * p_playlist, input_thread_t * p_input )
 273 {
 274     PL_ASSERT_LOCKED;
 275
 276     playlist_release_current_input( p_playlist );
 277
 278     if( p_input )
 279     {
 280         vlc_object_hold( p_input );
 281         pl_priv(p_playlist)->p_input = p_input;
 282
 283         var_AddCallback( p_input, "intf-event", InputEvent, p_playlist );
 284     }
 285 }
 286
 287 /** Get current playing input.
 288  */
 289 input_thread_t * playlist_CurrentInput( playlist_t * p_playlist )
 290 {
 291     input_thread_t * p_input;
 292     PL_LOCK;
 293     p_input = pl_priv(p_playlist)->p_input;
 294     if( p_input ) vlc_object_hold( p_input );
 295     PL_UNLOCK;
 296     return p_input;
 297 }
 298
 299 /**
 300  * @}
 301  */
 302
 303 /** Accessor for status item and status nodes.
 304  */
 305 playlist_item_t * get_current_status_item( playlist_t * p_playlist )
 306 {
 307     PL_ASSERT_LOCKED;
 308
 309     return pl_priv(p_playlist)->status.p_item;
 310 }
 311
 312 playlist_item_t * get_current_status_node( playlist_t * p_playlist )
 313 {
 314     PL_ASSERT_LOCKED;
 315
 316     return pl_priv(p_playlist)->status.p_node;
 317 }
 318
 319 void set_current_status_item( playlist_t * p_playlist,
 320     playlist_item_t * p_item )
 321 {
 322     PL_ASSERT_LOCKED;
 323
 324     if( pl_priv(p_playlist)->status.p_item &&
 325         pl_priv(p_playlist)->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG &&
 326         pl_priv(p_playlist)->status.p_item != p_item )
 327     {
 328         /* It's unsafe given current design to delete a playlist item :(
 329         playlist_ItemDelete( pl_priv(p_playlist)->status.p_item ); */
 330     }
 331     pl_priv(p_playlist)->status.p_item = p_item;
 332 }
 333
 334 void set_current_status_node( playlist_t * p_playlist,
 335     playlist_item_t * p_node )
 336 {
 337     PL_ASSERT_LOCKED;
 338
 339     if( pl_priv(p_playlist)->status.p_node &&
 340         pl_priv(p_playlist)->status.p_node->i_flags & PLAYLIST_REMOVE_FLAG &&
 341         pl_priv(p_playlist)->status.p_node != p_node )
 342     {
 343         /* It's unsafe given current design to delete a playlist item :(
 344         playlist_ItemDelete( pl_priv(p_playlist)->status.p_node ); */
 345     }
 346     pl_priv(p_playlist)->status.p_node = p_node;
 347 }
 348
 349 /**
 350  * Main loop
 351  *
 352  * Main loop for the playlist. It should be entered with the
 353  * playlist lock (otherwise input event may be lost)
 354  * \param p_playlist the playlist object
 355  * \return nothing
 356  */
 357 void playlist_MainLoop( playlist_t *p_playlist )
 358 {
 359     playlist_item_t *p_item = NULL;
 360     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 361
 362     PL_ASSERT_LOCKED;
 363
 364     if( pl_priv(p_playlist)->b_reset_currently_playing &&
 365         mdate() - pl_priv(p_playlist)->last_rebuild_date > 30000 ) // 30 ms
 366     {
 367         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 368                                get_current_status_item( p_playlist ) );
 369         pl_priv(p_playlist)->last_rebuild_date = mdate();
 370     }
 371
 372 check_input:
 373     /* If there is an input, check that it doesn't need to die. */
 374     if( pl_priv(p_playlist)->p_input )
 375     {
 376         if( pl_priv(p_playlist)->request.b_request && !pl_priv(p_playlist)->p_input->b_die )
 377         {
 378             PL_DEBUG( "incoming request - stopping current input" );
 379             input_StopThread( pl_priv(p_playlist)->p_input );
 380         }
 381
 382         /* This input is dead. Remove it ! */
 383         if( pl_priv(p_playlist)->p_input->b_dead )
 384         {
 385             int i_activity;
 386             input_thread_t *p_input;
 387             sout_instance_t **pp_sout = &pl_priv(p_playlist)->p_sout;
 388
 389             PL_DEBUG( "dead input" );
 390
 391             p_input = pl_priv(p_playlist)->p_input;
 392
 393             assert( *pp_sout == NULL );
 394             if( var_CreateGetBool( p_input, "sout-keep" ) )
 395                 *pp_sout = input_DetachSout( p_input );
 396
 397             /* Destroy input */
 398             playlist_release_current_input( p_playlist );
 399
 400             pl_priv(p_playlist)->gc_date = mdate();
 401             pl_priv(p_playlist)->b_cant_sleep = true;
 402
 403             i_activity= var_GetInteger( p_playlist, "activity" );
 404             var_SetInteger( p_playlist, "activity", i_activity -
 405                             DEFAULT_INPUT_ACTIVITY );
 406
 407             goto check_input;
 408         }
 409         /* This input is dying, let it do */
 410         else if( pl_priv(p_playlist)->p_input->b_die )
 411         {
 412             PL_DEBUG( "dying input" );
 413             PL_UNLOCK;
 414             msleep( INTF_IDLE_SLEEP );
 415             PL_LOCK;
 416             goto check_input;
 417         }
 418         /* This input has finished, ask it to die ! */
 419         else if( pl_priv(p_playlist)->p_input->b_error
 420                   || pl_priv(p_playlist)->p_input->b_eof )
 421         {
 422             PL_DEBUG( "finished input" );
 423             input_StopThread( pl_priv(p_playlist)->p_input );
 424             /* No need to wait here, we'll wait in the p_input->b_die case */
 425             goto check_input;
 426         }
 427         else if( pl_priv(p_playlist)->p_input->i_state != INIT_S )
 428         {
 429             ObjectGarbageCollector( p_playlist, false );
 430         }
 431     }
 432     else
 433     {
 434         /* No input. Several cases
 435          *  - No request, running status -> start new item
 436          *  - No request, stopped status -> collect garbage
 437          *  - Request, running requested -> start new item
 438          *  - Request, stopped requested -> collect garbage
 439         */
 440         int i_status = pl_priv(p_playlist)->request.b_request ?
 441             pl_priv(p_playlist)->request.i_status : pl_priv(p_playlist)->status.i_status;
 442         if( i_status != PLAYLIST_STOPPED )
 443         {
 444             msg_Dbg( p_playlist, "starting new item" );
 445             p_item = playlist_NextItem( p_playlist );
 446
 447             if( p_item == NULL )
 448             {
 449                 msg_Dbg( p_playlist, "nothing to play" );
 450                 pl_priv(p_playlist)->status.i_status = PLAYLIST_STOPPED;
 451
 452                 if( b_playexit == true )
 453                 {
 454                     msg_Info( p_playlist, "end of playlist, exiting" );
 455                     vlc_object_kill( p_playlist->p_libvlc );
 456                 }
 457                 ObjectGarbageCollector( p_playlist, true );
 458                 return;
 459             }
 460             playlist_PlayItem( p_playlist, p_item );
 461             /* playlist_PlayItem loose input event, we need to recheck */
 462             goto check_input;
 463         }
 464         else
 465         {
 466             const bool b_gc_forced = pl_priv(p_playlist)->status.i_status != PLAYLIST_STOPPED;
 467
 468             pl_priv(p_playlist)->status.i_status = PLAYLIST_STOPPED;
 469
 470             /* Collect garbage */
 471             ObjectGarbageCollector( p_playlist, b_gc_forced );
 472         }
 473     }
 474 }
 475
 476 /**
 477  * Last loop
 478  *
 479  * The playlist is dying so do the last loop
 480  * \param p_playlist the playlist object
 481  * \return nothing
 482 */
 483 void playlist_LastLoop( playlist_t *p_playlist )
 484 {
 485     /* If there is an input, kill it */
 486     while( 1 )
 487     {
 488         PL_LOCK;
 489         if( pl_priv(p_playlist)->p_input == NULL )
 490         {
 491             PL_UNLOCK;
 492             break;
 493         }
 494
 495         if( pl_priv(p_playlist)->p_input->b_dead )
 496         {
 497             /* remove input */
 498             playlist_release_current_input( p_playlist );
 499
 500             /* sout-keep: no need to anything here.
 501              * The last input will destroy its sout, if any, by itself */
 502
 503             PL_UNLOCK;
 504             continue;
 505         }
 506         else if( pl_priv(p_playlist)->p_input->b_die )
 507         {
 508             /* This input is dying, leave it alone */
 509             ;
 510         }
 511         else if( pl_priv(p_playlist)->p_input->b_error || pl_priv(p_playlist)->p_input->b_eof )
 512         {
 513             input_StopThread( pl_priv(p_playlist)->p_input );
 514             PL_UNLOCK;
 515             continue;
 516         }
 517         else
 518         {
 519             pl_priv(p_playlist)->p_input->b_eof = 1;
 520         }
 521         PL_UNLOCK;
 522
 523         msleep( INTF_IDLE_SLEEP );
 524     }
 525
 526 #ifdef ENABLE_SOUT
 527     /* close the remaining sout-keep (if there was no input atm) */
 528     sout_instance_t *p_sout = pl_priv(p_playlist)->p_sout;
 529     if (p_sout)
 530         sout_DeleteInstance( p_sout );
 531 #endif
 532
 533     /* Core should have terminated all SDs before the playlist */
 534     /* TODO: It fails to do so when not playing anything -- Courmisch */
 535     playlist_ServicesDiscoveryKillAll( p_playlist );
 536     playlist_MLDump( p_playlist );
 537
 538     PL_LOCK;
 539
 540     /* Release the current node */
 541     set_current_status_node( p_playlist, NULL );
 542
 543     /* Release the current item */
 544     set_current_status_item( p_playlist, NULL );
 545
 546     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 547         free( p_del->pp_children );
 548         vlc_gc_decref( p_del->p_input );
 549         free( p_del );
 550     FOREACH_END();
 551     ARRAY_RESET( p_playlist->all_items );
 552     FOREACH_ARRAY( playlist_item_t *p_del, pl_priv(p_playlist)->items_to_delete )
 553         free( p_del->pp_children );
 554         vlc_gc_decref( p_del->p_input );
 555         free( p_del );
 556     FOREACH_END();
 557     ARRAY_RESET( pl_priv(p_playlist)->items_to_delete );
 558
 559     ARRAY_RESET( p_playlist->items );
 560     ARRAY_RESET( p_playlist->current );
 561
 562     PL_UNLOCK;
 563 }
 564
 565 /**
 566  * Preparse queue loop
 567  *
 568  * @param p_obj preparse structure
 569  * @return never
 570  */
 571 void *playlist_PreparseLoop( void *data )
 572 {
 573     playlist_preparse_t *p_preparse = data;
 574     playlist_t *p_playlist = &((playlist_private_t *)(((char *)p_preparse)
 575              - offsetof(playlist_private_t, preparse)))->public_data;
 576
 577     for( ;; )
 578     {
 579         input_item_t *p_current;
 580
 581         vlc_mutex_lock( &p_preparse->lock );
 582         mutex_cleanup_push( &p_preparse->lock );
 583
 584         while( p_preparse->i_waiting == 0 )
 585             vlc_cond_wait( &p_preparse->wait, &p_preparse->lock );
 586
 587         p_current = p_preparse->pp_waiting[0];
 588         REMOVE_ELEM( p_preparse->pp_waiting, p_preparse->i_waiting, 0 );
 589         vlc_cleanup_run( );
 590
 591         if( p_current )
 592         {
 593             int canc = vlc_savecancel ();
 594             PL_LOCK;
 595             if( p_current->i_type == ITEM_TYPE_FILE )
 596             {
 597                 stats_TimerStart( p_playlist, "Preparse run",
 598                                   STATS_TIMER_PREPARSE );
 599                 /* Do not preparse if it is already done (like by playing it) */
 600                 if( !input_item_IsPreparsed( p_current ) )
 601                 {
 602                     PL_UNLOCK;
 603                     input_Preparse( p_playlist, p_current );
 604                     PL_LOCK;
 605                 }
 606                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 607                 PL_UNLOCK;
 608                 input_item_SetPreparsed( p_current, true );
 609                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 610                 PL_LOCK;
 611             }
 612             /* If we haven't retrieved enough meta, add to secondary queue
 613              * which will run the "meta fetchers".
 614              * This only checks for meta, not for art
 615              * \todo don't do this for things we won't get meta for, like vids
 616              */
 617             char *psz_arturl = input_item_GetArtURL( p_current );
 618             char *psz_name = input_item_GetName( p_current );
 619             playlist_fetcher_t *p_fetcher = &pl_priv(p_playlist)->fetcher;
 620             if( p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 621                 ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 622             {
 623                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 624                 vlc_mutex_lock( &p_fetcher->lock );
 625                 INSERT_ELEM( p_fetcher->pp_waiting, p_fetcher->i_waiting,
 626                              p_fetcher->i_waiting, p_current);
 627                 vlc_cond_signal( &p_fetcher->wait );
 628                 vlc_mutex_unlock( &p_fetcher->lock );
 629             }
 630             else
 631             {
 632                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 633                           psz_name, psz_arturl );
 634                 vlc_gc_decref( p_current );
 635             }
 636             free( psz_name );
 637             free( psz_arturl );
 638             PL_UNLOCK;
 639             vlc_restorecancel( canc );
 640         }
 641
 642         int i_activity = var_GetInteger( p_playlist, "activity" );
 643         if( i_activity < 0 ) i_activity = 0;
 644         /* Sleep at least 1ms */
 645         msleep( (i_activity+1) * 1000 );
 646     }
 647
 648     assert( 0 );
 649     return NULL;
 650 }
 651
 652 /**
 653  * Fetcher loop
 654  *
 655  * \return never
 656  */
 657 void *playlist_FetcherLoop( void *data )
 658 {
 659     playlist_fetcher_t *p_fetcher = data;
 660     playlist_t *p_playlist = &((playlist_private_t *)(((char *)p_fetcher)
 661              - offsetof(playlist_private_t, fetcher)))->public_data;
 662
 663     for( ;; )
 664     {
 665         input_item_t *p_item;
 666
 667         vlc_mutex_lock( &p_fetcher->lock );
 668         mutex_cleanup_push( &p_fetcher->lock );
 669
 670         while( p_fetcher->i_waiting == 0 )
 671             vlc_cond_wait( &p_fetcher->wait, &p_fetcher->lock );
 672
 673         p_item = p_fetcher->pp_waiting[0];
 674         REMOVE_ELEM( p_fetcher->pp_waiting, p_fetcher->i_waiting, 0 );
 675         vlc_cleanup_run( );
 676
 677         int canc = vlc_savecancel();
 678         if( p_item )
 679         {
 680             int i_ret;
 681
 682             /* Check if it is not yet preparsed and if so wait for it
 683              * (at most 0.5s)
 684              * (This can happen if we fetch art on play)
 685              * FIXME this doesn't work if we need to fetch meta before art...
 686              */
 687             for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 688             {
 689                 bool b_break;
 690                 PL_LOCK;
 691                 b_break = ( !pl_priv(p_playlist)->p_input || input_GetItem(pl_priv(p_playlist)->p_input) != p_item  ||
 692                             pl_priv(p_playlist)->p_input->b_die || pl_priv(p_playlist)->p_input->b_eof || pl_priv(p_playlist)->p_input->b_error );
 693                 PL_UNLOCK;
 694                 if( b_break )
 695                     break;
 696                 msleep( 50000 );
 697             }
 698
 699             i_ret = input_ArtFind( p_playlist, p_item );
 700             if( i_ret == 1 )
 701             {
 702                 PL_DEBUG( "downloading art for %s", p_item->psz_name );
 703                 if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 704                     input_item_SetArtNotFound( p_item, true );
 705                 else {
 706                     input_item_SetArtFetched( p_item, true );
 707                     var_SetInteger( p_playlist, "item-change",
 708                                     p_item->i_id );
 709                 }
 710             }
 711             else if( i_ret == 0 ) /* Was in cache */
 712             {
 713                 PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 714                 input_item_SetArtFetched( p_item, true );
 715                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 716             }
 717             else
 718             {
 719                 PL_DEBUG( "art not found for %s", p_item->psz_name );
 720                 input_item_SetArtNotFound( p_item, true );
 721             }
 722             vlc_gc_decref( p_item );
 723         }
 724         vlc_restorecancel( canc );
 725
 726         int i_activity = var_GetInteger( p_playlist, "activity" );
 727         if( i_activity < 0 ) i_activity = 0;
 728         /* Sleep at least 1ms */
 729         msleep( (i_activity+1) * 1000 );
 730     }
 731
 732     assert( 0 );
 733     return NULL;
 734 }
 735
 736 static void VariablesInit( playlist_t *p_playlist )
 737 {
 738     vlc_value_t val;
 739     /* These variables control updates */
 740     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 741     val.b_bool = true;
 742     var_Set( p_playlist, "intf-change", val );
 743
 744     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 745     val.i_int = -1;
 746     var_Set( p_playlist, "item-change", val );
 747
 748     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 749     val.i_int = -1;
 750     var_Set( p_playlist, "item-deleted", val );
 751
 752     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 753
 754     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 755     val.i_int = -1;
 756     var_Set( p_playlist, "playlist-current", val );
 757
 758     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 759     var_SetInteger( p_playlist, "activity", 0 );
 760
 761     /* Variables to control playback */
 762     var_Create( p_playlist, "play-and-stop", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 763     var_Create( p_playlist, "play-and-exit", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 764     var_Create( p_playlist, "random", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 765     var_Create( p_playlist, "repeat", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 766     var_Create( p_playlist, "loop", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 767
 768     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 769 }
 770
 771 int playlist_CurrentId( playlist_t * p_playlist )
 772 {
 773     return pl_priv(p_playlist)->status.p_item->i_id;
 774 }
 775
 776 bool playlist_IsPlaying( playlist_t * p_playlist )
 777 {
 778     return ( pl_priv(p_playlist)->status.i_status == PLAYLIST_RUNNING &&
 779             !(pl_priv(p_playlist)->request.b_request && pl_priv(p_playlist)->request.i_status == PLAYLIST_STOPPED) );
 780 }
 781
 782 playlist_item_t * playlist_CurrentPlayingItem( playlist_t * p_playlist )
 783 {
 784     return pl_priv(p_playlist)->status.p_item;
 785 }
 786
 787 int playlist_Status( playlist_t * p_playlist )
 788 {
 789     return pl_priv(p_playlist)->status.i_status;
 790 }