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 <assert.h>
  29 #include <vlc_common.h>
  30 #include <vlc_sout.h>
  31 #include <vlc_playlist.h>
  32 #include <vlc_interface.h>
  33 #include "playlist_internal.h"
  34 #include "stream_output/stream_output.h" /* sout_DeleteInstance */
  35
  36 /*****************************************************************************
  37  * Local prototypes
  38  *****************************************************************************/
  39 static void VariablesInit( playlist_t *p_playlist );
  40 static void playlist_Destructor( vlc_object_t * p_this );
  41 static void playlist_Destructor( vlc_object_t * p_this );
  42
  43 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  44                            vlc_value_t oldval, vlc_value_t newval, void *a )
  45 {
  46     (void)psz_cmd; (void)oldval; (void)newval; (void)a;
  47
  48     ((playlist_t*)p_this)->b_reset_currently_playing = true;
  49     playlist_Signal( ((playlist_t*)p_this) );
  50     return VLC_SUCCESS;
  51 }
  52
  53 /**
  54  * Create playlist
  55  *
  56  * Create a playlist structure.
  57  * \param p_parent the vlc object that is to be the parent of this playlist
  58  * \return a pointer to the created playlist, or NULL on error
  59  */
  60 playlist_t * playlist_Create( vlc_object_t *p_parent )
  61 {
  62     static const char playlist_name[] = "playlist";
  63     playlist_t *p_playlist;
  64     bool b_save;
  65
  66     /* Allocate structure */
  67     p_playlist = vlc_custom_create( p_parent, sizeof( *p_playlist ),
  68                                     VLC_OBJECT_GENERIC, playlist_name );
  69     if( !p_playlist )
  70         return NULL;
  71
  72     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
  73     MALLOC_NULL( p_playlist->p, playlist_private_t );
  74     memset( p_playlist->p, 0, sizeof( playlist_private_t ) );
  75
  76     libvlc_priv(p_parent->p_libvlc)->p_playlist = p_playlist;
  77
  78     VariablesInit( p_playlist );
  79
  80     /* Initialise data structures */
  81     p_playlist->i_last_playlist_id = 0;
  82     p_playlist->p_input = NULL;
  83
  84     p_playlist->gc_date = 0;
  85     p_playlist->b_cant_sleep = false;
  86
  87     ARRAY_INIT( p_playlist->items );
  88     ARRAY_INIT( p_playlist->all_items );
  89     ARRAY_INIT( p_playlist->items_to_delete );
  90     ARRAY_INIT( p_playlist->current );
  91
  92     p_playlist->i_current_index = 0;
  93     p_playlist->b_reset_currently_playing = true;
  94     p_playlist->last_rebuild_date = 0;
  95
  96     p_playlist->b_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  97
  98     p_playlist->b_doing_ml = false;
  99
 100     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     p_playlist->status.p_item = NULL;
 149     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 150     p_playlist->request.b_request = false;
 151     p_playlist->status.i_status = PLAYLIST_STOPPED;
 152
 153     p_playlist->i_sort = SORT_ID;
 154     p_playlist->i_order = ORDER_NORMAL;
 155
 156
 157     b_save = p_playlist->b_auto_preparse;
 158     p_playlist->b_auto_preparse = false;
 159     playlist_MLLoad( p_playlist );
 160     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     if( p_playlist->p->p_preparse )
 180     {
 181         vlc_object_release( p_playlist->p->p_preparse );
 182     }
 183
 184     if( p_playlist->p->p_fetcher )
 185     {
 186         vlc_object_release( p_playlist->p->p_fetcher );
 187     }
 188     msg_Dbg( p_this, "Destroyed" );
 189 }
 190
 191 /* Destroy remaining objects */
 192 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
 193 {
 194     if( !b_force )
 195     {
 196         if( mdate() - p_playlist->gc_date < 1000000 )
 197         {
 198             p_playlist->b_cant_sleep = true;
 199             return;
 200         }
 201         else if( p_playlist->gc_date == 0 )
 202             return;
 203     }
 204
 205     p_playlist->b_cant_sleep = false;
 206 }
 207
 208 /* Input Callback */
 209 static void input_state_changed( const vlc_event_t * event, void * data )
 210 {
 211     (void)event;
 212     playlist_t * p_playlist = data;
 213     playlist_Signal( p_playlist );
 214 }
 215
 216 /* Input Callback */
 217 static void input_selected_stream_changed( const vlc_event_t * event, void * data )
 218 {
 219     (void)event;
 220     playlist_t * p_playlist = data;
 221     PL_LOCK;
 222     p_playlist->gc_date = mdate();
 223     vlc_object_signal_unlocked( p_playlist );
 224     PL_UNLOCK;
 225 }
 226
 227 /* Internals */
 228 void playlist_release_current_input( playlist_t * p_playlist )
 229 {
 230     PL_ASSERT_LOCKED;
 231
 232     if( !p_playlist->p_input ) return;
 233
 234     input_thread_t * p_input = p_playlist->p_input;
 235     vlc_event_manager_t * p_em = input_get_event_manager( p_input );
 236
 237     vlc_event_detach( p_em, vlc_InputStateChanged,
 238                       input_state_changed, p_playlist );
 239     vlc_event_detach( p_em, vlc_InputSelectedStreamChanged,
 240                       input_selected_stream_changed, p_playlist );
 241     p_playlist->p_input = NULL;
 242
 243     /* Release the playlist lock, because we may get stuck
 244      * in vlc_object_release() for some time. */
 245     PL_UNLOCK;
 246     vlc_thread_join( p_input );
 247     vlc_object_release( p_input );
 248     PL_LOCK;
 249 }
 250
 251 void playlist_set_current_input(
 252     playlist_t * p_playlist, input_thread_t * p_input )
 253 {
 254     PL_ASSERT_LOCKED;
 255
 256     playlist_release_current_input( p_playlist );
 257
 258     if( p_input )
 259     {
 260         vlc_object_yield( p_input );
 261         p_playlist->p_input = p_input;
 262         vlc_event_manager_t * p_em = input_get_event_manager( p_input );
 263         vlc_event_attach( p_em, vlc_InputStateChanged,
 264                           input_state_changed, p_playlist );
 265         vlc_event_attach( p_em, vlc_InputSelectedStreamChanged,
 266                           input_selected_stream_changed, p_playlist );
 267     }
 268 }
 269
 270 /** Get current playing input.
 271  */
 272 input_thread_t * playlist_CurrentInput( playlist_t * p_playlist )
 273 {
 274     input_thread_t * p_input;
 275     PL_LOCK;
 276     p_input = p_playlist->p_input;
 277     if( p_input ) vlc_object_yield( p_input );
 278     PL_UNLOCK;
 279     return p_input;
 280 }
 281
 282 /**
 283  * @}
 284  */
 285
 286 /** Accessor for status item and status nodes.
 287  */
 288 playlist_item_t * get_current_status_item( playlist_t * p_playlist )
 289 {
 290     PL_ASSERT_LOCKED;
 291
 292     return p_playlist->status.p_item;
 293 }
 294
 295 playlist_item_t * get_current_status_node( playlist_t * p_playlist )
 296 {
 297     PL_ASSERT_LOCKED;
 298
 299     return p_playlist->status.p_node;
 300 }
 301
 302 void set_current_status_item( playlist_t * p_playlist,
 303     playlist_item_t * p_item )
 304 {
 305     PL_ASSERT_LOCKED;
 306
 307     if( p_playlist->status.p_item &&
 308         p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG &&
 309         p_playlist->status.p_item != p_item )
 310     {
 311         /* It's unsafe given current design to delete a playlist item :(
 312         playlist_ItemDelete( p_playlist->status.p_item ); */
 313     }
 314     p_playlist->status.p_item = p_item;
 315 }
 316
 317 void set_current_status_node( playlist_t * p_playlist,
 318     playlist_item_t * p_node )
 319 {
 320     PL_ASSERT_LOCKED;
 321
 322     if( p_playlist->status.p_node &&
 323         p_playlist->status.p_node->i_flags & PLAYLIST_REMOVE_FLAG &&
 324         p_playlist->status.p_node != p_node )
 325     {
 326         /* It's unsafe given current design to delete a playlist item :(
 327         playlist_ItemDelete( p_playlist->status.p_node ); */
 328     }
 329     p_playlist->status.p_node = p_node;
 330 }
 331
 332 /**
 333  * Main loop
 334  *
 335  * Main loop for the playlist. It should be entered with the
 336  * playlist lock (otherwise input event may be lost)
 337  * \param p_playlist the playlist object
 338  * \return nothing
 339  */
 340 void playlist_MainLoop( playlist_t *p_playlist )
 341 {
 342     playlist_item_t *p_item = NULL;
 343     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 344
 345     PL_ASSERT_LOCKED;
 346
 347     if( p_playlist->b_reset_currently_playing &&
 348         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 349     {
 350         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 351                                get_current_status_item( p_playlist ) );
 352         p_playlist->last_rebuild_date = mdate();
 353     }
 354
 355 check_input:
 356     /* If there is an input, check that it doesn't need to die. */
 357     if( p_playlist->p_input )
 358     {
 359         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 360         {
 361             PL_DEBUG( "incoming request - stopping current input" );
 362             input_StopThread( p_playlist->p_input );
 363         }
 364
 365         /* This input is dead. Remove it ! */
 366         if( p_playlist->p_input->b_dead )
 367         {
 368             int i_activity;
 369             input_thread_t *p_input;
 370             sout_instance_t **pp_sout = &p_playlist->p->p_sout;
 371
 372             PL_DEBUG( "dead input" );
 373
 374             p_input = p_playlist->p_input;
 375
 376             assert( *pp_sout == NULL );
 377             if( var_CreateGetBool( p_input, "sout-keep" ) )
 378                 *pp_sout = input_DetachSout( p_input );
 379
 380             /* Destroy input */
 381             playlist_release_current_input( p_playlist );
 382
 383             p_playlist->gc_date = mdate();
 384             p_playlist->b_cant_sleep = true;
 385
 386             i_activity= var_GetInteger( p_playlist, "activity" );
 387             var_SetInteger( p_playlist, "activity", i_activity -
 388                             DEFAULT_INPUT_ACTIVITY );
 389
 390             goto check_input;
 391         }
 392         /* This input is dying, let it do */
 393         else if( p_playlist->p_input->b_die )
 394         {
 395             PL_DEBUG( "dying input" );
 396             PL_UNLOCK;
 397             msleep( INTF_IDLE_SLEEP );
 398             PL_LOCK;
 399             goto check_input;
 400         }
 401         /* This input has finished, ask it to die ! */
 402         else if( p_playlist->p_input->b_error
 403                   || p_playlist->p_input->b_eof )
 404         {
 405             PL_DEBUG( "finished input" );
 406             input_StopThread( p_playlist->p_input );
 407             /* No need to wait here, we'll wait in the p_input->b_die case */
 408             goto check_input;
 409         }
 410         else if( p_playlist->p_input->i_state != INIT_S )
 411         {
 412             ObjectGarbageCollector( p_playlist, false );
 413         }
 414     }
 415     else
 416     {
 417         /* No input. Several cases
 418          *  - No request, running status -> start new item
 419          *  - No request, stopped status -> collect garbage
 420          *  - Request, running requested -> start new item
 421          *  - Request, stopped requested -> collect garbage
 422         */
 423         int i_status = p_playlist->request.b_request ?
 424             p_playlist->request.i_status : p_playlist->status.i_status;
 425         if( i_status != PLAYLIST_STOPPED )
 426         {
 427             msg_Dbg( p_playlist, "starting new item" );
 428             p_item = playlist_NextItem( p_playlist );
 429
 430             if( p_item == NULL )
 431             {
 432                 msg_Dbg( p_playlist, "nothing to play" );
 433                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 434
 435                 if( b_playexit == true )
 436                 {
 437                     msg_Info( p_playlist, "end of playlist, exiting" );
 438                     vlc_object_kill( p_playlist->p_libvlc );
 439                 }
 440                 ObjectGarbageCollector( p_playlist, true );
 441                 return;
 442             }
 443             playlist_PlayItem( p_playlist, p_item );
 444             /* playlist_PlayItem loose input event, we need to recheck */
 445             goto check_input;
 446         }
 447         else
 448         {
 449             const bool b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 450
 451             p_playlist->status.i_status = PLAYLIST_STOPPED;
 452
 453             /* Collect garbage */
 454             ObjectGarbageCollector( p_playlist, b_gc_forced );
 455         }
 456     }
 457 }
 458
 459 /**
 460  * Last loop
 461  *
 462  * The playlist is dying so do the last loop
 463  * \param p_playlist the playlist object
 464  * \return nothing
 465 */
 466 void playlist_LastLoop( playlist_t *p_playlist )
 467 {
 468     /* If there is an input, kill it */
 469     while( 1 )
 470     {
 471         PL_LOCK;
 472         if( p_playlist->p_input == NULL )
 473         {
 474             PL_UNLOCK;
 475             break;
 476         }
 477
 478         if( p_playlist->p_input->b_dead )
 479         {
 480             /* remove input */
 481             playlist_release_current_input( p_playlist );
 482
 483             /* sout-keep: no need to anything here.
 484              * The last input will destroy its sout, if any, by itself */
 485
 486             PL_UNLOCK;
 487             continue;
 488         }
 489         else if( p_playlist->p_input->b_die )
 490         {
 491             /* This input is dying, leave it alone */
 492             ;
 493         }
 494         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 495         {
 496             input_StopThread( p_playlist->p_input );
 497             PL_UNLOCK;
 498             continue;
 499         }
 500         else
 501         {
 502             p_playlist->p_input->b_eof = 1;
 503         }
 504         PL_UNLOCK;
 505
 506         msleep( INTF_IDLE_SLEEP );
 507     }
 508
 509 #ifdef ENABLE_SOUT
 510     /* close the remaining sout-keep (if there was no input atm) */
 511     sout_instance_t *p_sout = p_playlist->p->p_sout;
 512     if (p_sout)
 513         sout_DeleteInstance( p_sout );
 514 #endif
 515
 516     /* Core should have terminated all SDs before the playlist */
 517     /* TODO: It fails to do so when not playing anything -- Courmisch */
 518     playlist_ServicesDiscoveryKillAll( p_playlist );
 519     playlist_MLDump( p_playlist );
 520
 521     vlc_object_kill( p_playlist->p->p_preparse );
 522     vlc_thread_join( p_playlist->p->p_preparse );
 523     vlc_object_kill( p_playlist->p->p_fetcher );
 524     vlc_thread_join( p_playlist->p->p_fetcher );
 525
 526     PL_LOCK;
 527
 528     /* Release the current node */
 529     set_current_status_node( p_playlist, NULL );
 530
 531     /* Release the current item */
 532     set_current_status_item( p_playlist, NULL );
 533
 534     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 535         free( p_del->pp_children );
 536         vlc_gc_decref( p_del->p_input );
 537         free( p_del );
 538     FOREACH_END();
 539     ARRAY_RESET( p_playlist->all_items );
 540     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->items_to_delete )
 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->items_to_delete );
 546
 547     ARRAY_RESET( p_playlist->items );
 548     ARRAY_RESET( p_playlist->current );
 549
 550     PL_UNLOCK;
 551 }
 552
 553 /**
 554  * Preparse loop
 555  *
 556  * Main loop for preparser queue
 557  * \param p_obj items to preparse
 558  * \return nothing
 559  */
 560 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 561 {
 562     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 563     input_item_t *p_current;
 564     int i_activity;
 565
 566     vlc_object_lock( p_obj );
 567
 568     while( vlc_object_alive( p_obj ) )
 569     {
 570         if( p_obj->i_waiting == 0 )
 571         {
 572             vlc_object_wait( p_obj );
 573             continue;
 574         }
 575
 576         p_current = p_obj->pp_waiting[0];
 577         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 578         vlc_object_unlock( p_obj );
 579
 580         PL_LOCK;
 581         if( p_current )
 582         {
 583             if( p_current->i_type == ITEM_TYPE_FILE )
 584             {
 585                 stats_TimerStart( p_playlist, "Preparse run",
 586                                   STATS_TIMER_PREPARSE );
 587                 /* Do not preparse if it is already done (like by playing it) */
 588                 if( !input_item_IsPreparsed( p_current ) )
 589                 {
 590                     PL_UNLOCK;
 591                     input_Preparse( p_playlist, p_current );
 592                     PL_LOCK;
 593                 }
 594                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 595                 PL_UNLOCK;
 596                 input_item_SetPreparsed( p_current, true );
 597                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 598                 PL_LOCK;
 599             }
 600             /* If we haven't retrieved enough meta, add to secondary queue
 601              * which will run the "meta fetchers".
 602              * This only checks for meta, not for art
 603              * \todo don't do this for things we won't get meta for, like vids
 604              */
 605             char *psz_arturl = input_item_GetArtURL( p_current );
 606             char *psz_name = input_item_GetName( p_current );
 607             if( p_playlist->p->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 608                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 609             {
 610                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 611                 vlc_object_lock( p_playlist->p->p_fetcher );
 612                 if( vlc_object_alive( p_playlist->p->p_fetcher ) )
 613                 {
 614                     INSERT_ELEM( p_playlist->p->p_fetcher->pp_waiting,
 615                         p_playlist->p->p_fetcher->i_waiting,
 616                         p_playlist->p->p_fetcher->i_waiting, p_current);
 617                     vlc_object_signal_unlocked( p_playlist->p->p_fetcher );
 618                 }
 619                 else
 620                     vlc_gc_decref( p_current );
 621                 vlc_object_unlock( p_playlist->p->p_fetcher );
 622             }
 623             else
 624             {
 625                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 626                           psz_name, psz_arturl );
 627                 vlc_gc_decref( p_current );
 628             }
 629             free( psz_name );
 630             free( psz_arturl );
 631             PL_UNLOCK;
 632         }
 633         else
 634             PL_UNLOCK;
 635
 636         vlc_object_lock( p_obj );
 637         i_activity = var_GetInteger( p_playlist, "activity" );
 638         if( i_activity < 0 ) i_activity = 0;
 639         vlc_object_unlock( p_obj );
 640         /* Sleep at least 1ms */
 641         msleep( (i_activity+1) * 1000 );
 642         vlc_object_lock( p_obj );
 643     }
 644
 645     while( p_obj->i_waiting > 0 )
 646     {
 647         vlc_gc_decref( p_obj->pp_waiting[0] );
 648         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 649     }
 650
 651     vlc_object_unlock( p_obj );
 652 }
 653
 654 /**
 655  * Fetcher loop
 656  *
 657  * Main loop for secondary preparser queue
 658  * \param p_obj items to preparse
 659  * \return nothing
 660  */
 661 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 662 {
 663     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 664     input_item_t *p_item;
 665     int i_activity;
 666
 667     vlc_object_lock( p_obj );
 668
 669     while( vlc_object_alive( p_obj ) )
 670     {
 671         if( p_obj->i_waiting == 0 )
 672         {
 673             vlc_object_wait( p_obj );
 674             continue;
 675         }
 676
 677         p_item = p_obj->pp_waiting[0];
 678         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 679         vlc_object_unlock( p_obj );
 680         if( p_item )
 681         {
 682             int i_ret;
 683
 684             /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 685              * (This can happen if we fetch art on play)
 686              * FIXME this doesn't work if we need to fetch meta before art ... */
 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 = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 692                             p_playlist->p_input->b_die || p_playlist->p_input->b_eof || 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_object_lock( p_obj );
 725         i_activity = var_GetInteger( p_playlist, "activity" );
 726         if( i_activity < 0 ) i_activity = 0;
 727         vlc_object_unlock( p_obj );
 728         /* Sleep at least 1ms */
 729         msleep( (i_activity+1) * 1000 );
 730         vlc_object_lock( p_obj );
 731     }
 732
 733     while( p_obj->i_waiting > 0 )
 734     {
 735         vlc_gc_decref( p_obj->pp_waiting[0] );
 736         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 737     }
 738
 739     vlc_object_unlock( p_obj );
 740 }
 741
 742 static void VariablesInit( playlist_t *p_playlist )
 743 {
 744     vlc_value_t val;
 745     /* These variables control updates */
 746     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 747     val.b_bool = true;
 748     var_Set( p_playlist, "intf-change", val );
 749
 750     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 751     val.i_int = -1;
 752     var_Set( p_playlist, "item-change", val );
 753
 754     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 755     val.i_int = -1;
 756     var_Set( p_playlist, "item-deleted", val );
 757
 758     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 759
 760     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 761     val.i_int = -1;
 762     var_Set( p_playlist, "playlist-current", val );
 763
 764     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 765     var_SetInteger( p_playlist, "activity", 0 );
 766
 767     /* Variables to control playback */
 768     var_CreateGetBool( p_playlist, "play-and-stop" );
 769     var_CreateGetBool( p_playlist, "play-and-exit" );
 770     var_CreateGetBool( p_playlist, "random" );
 771     var_CreateGetBool( p_playlist, "repeat" );
 772     var_CreateGetBool( p_playlist, "loop" );
 773
 774     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 775 }