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