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