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) 1999-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Clément Stenac <zorglub@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24 #include <vlc/vlc.h>
  25 #include <vlc/vout.h>
  26 #include <vlc/sout.h>
  27 #include <vlc/input.h>
  28 #include "vlc_playlist.h"
  29 #include "vlc_interaction.h"
  30 #include "playlist_internal.h"
  31
  32 /*****************************************************************************
  33  * Local prototypes
  34  *****************************************************************************/
  35 static void VariablesInit( playlist_t *p_playlist );
  36
  37 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  38                            vlc_value_t oldval, vlc_value_t newval, void *a )
  39 {
  40     ((playlist_t*)p_this)->b_reset_currently_playing = VLC_TRUE;
  41     return VLC_SUCCESS;
  42 }
  43
  44 /**
  45  * Create playlist
  46  *
  47  * Create a playlist structure.
  48  * \param p_parent the vlc object that is to be the parent of this playlist
  49  * \return a pointer to the created playlist, or NULL on error
  50  */
  51 playlist_t * playlist_Create( vlc_object_t *p_parent )
  52 {
  53     playlist_t *p_playlist;
  54     int i_tree;
  55
  56     /* Allocate structure */
  57     p_playlist = vlc_object_create( p_parent, VLC_OBJECT_PLAYLIST );
  58     if( !p_playlist )
  59     {
  60         msg_Err( p_parent, "out of memory" );
  61         return NULL;
  62     }
  63     p_parent->p_libvlc->p_playlist = p_playlist;
  64
  65     VariablesInit( p_playlist );
  66
  67     /* Initialise data structures */
  68     vlc_mutex_init( p_playlist, &p_playlist->gc_lock );
  69     p_playlist->i_last_playlist_id = 0;
  70     p_playlist->i_last_input_id = 0;
  71     p_playlist->p_input = NULL;
  72
  73     p_playlist->i_vout_destroyed_date = 0;
  74     p_playlist->i_sout_destroyed_date = 0;
  75
  76     ARRAY_INIT( p_playlist->items );
  77     ARRAY_INIT( p_playlist->all_items );
  78     ARRAY_INIT( p_playlist->input_items );
  79     ARRAY_INIT( p_playlist->current );
  80
  81     p_playlist->i_current_index = 0;
  82     p_playlist->b_reset_currently_playing = VLC_TRUE;
  83
  84     i_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  85     p_playlist->b_always_tree = (i_tree == 1);
  86     p_playlist->b_never_tree = (i_tree == 2);
  87
  88     p_playlist->b_doing_ml = VLC_FALSE;
  89
  90     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL);
  91     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL);
  92
  93     /* Create playlist and media library */
  94     p_playlist->p_local_category = playlist_NodeCreate( p_playlist,
  95                                  _( "Playlist" ),p_playlist->p_root_category );
  96     p_playlist->p_local_onelevel =  playlist_NodeCreate( p_playlist,
  97                                 _( "Playlist" ), p_playlist->p_root_onelevel );
  98     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
  99     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 100
 101     /* Link the nodes together. Todo: actually create them from the same input*/
 102     p_playlist->p_local_onelevel->p_input->i_id =
 103         p_playlist->p_local_category->p_input->i_id;
 104
 105     if( config_GetInt( p_playlist, "media-library") )
 106     {
 107         p_playlist->p_ml_category =   playlist_NodeCreate( p_playlist,
 108                            _( "Media Library" ), p_playlist->p_root_category );
 109         p_playlist->p_ml_onelevel =  playlist_NodeCreate( p_playlist,
 110                            _( "Media Library" ), p_playlist->p_root_onelevel );
 111         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 112         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 113         p_playlist->p_ml_onelevel->p_input->i_id =
 114              p_playlist->p_ml_category->p_input->i_id;
 115
 116     }
 117     else
 118     {
 119         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 120     }
 121
 122     /* Initial status */
 123     p_playlist->status.p_item = NULL;
 124     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 125     p_playlist->request.b_request = VLC_FALSE;
 126     p_playlist->status.i_status = PLAYLIST_STOPPED;
 127
 128     p_playlist->i_sort = SORT_ID;
 129     p_playlist->i_order = ORDER_NORMAL;
 130
 131     vlc_object_attach( p_playlist, p_parent );
 132
 133     playlist_MLLoad( p_playlist );
 134     return p_playlist;
 135 }
 136
 137 void playlist_Destroy( playlist_t *p_playlist )
 138 {
 139     while( p_playlist->i_sds )
 140     {
 141         playlist_ServicesDiscoveryRemove( p_playlist,
 142                                           p_playlist->pp_sds[0]->psz_module );
 143     }
 144
 145     playlist_MLDump( p_playlist );
 146
 147     vlc_thread_join( p_playlist->p_preparse );
 148     vlc_thread_join( p_playlist->p_secondary_preparse );
 149     vlc_thread_join( p_playlist );
 150
 151     vlc_object_detach( p_playlist->p_preparse );
 152     vlc_object_detach( p_playlist->p_secondary_preparse );
 153
 154     var_Destroy( p_playlist, "intf-change" );
 155     var_Destroy( p_playlist, "item-change" );
 156     var_Destroy( p_playlist, "playlist-current" );
 157     var_Destroy( p_playlist, "intf-popmenu" );
 158     var_Destroy( p_playlist, "intf-show" );
 159     var_Destroy( p_playlist, "play-and-stop" );
 160     var_Destroy( p_playlist, "play-and-exit" );
 161     var_Destroy( p_playlist, "random" );
 162     var_Destroy( p_playlist, "repeat" );
 163     var_Destroy( p_playlist, "loop" );
 164     var_Destroy( p_playlist, "activity" );
 165
 166     PL_LOCK;
 167     /* Go through all items, and simply free everything without caring
 168      * about the tree structure. Do not decref, it will be done by doing
 169      * the same thing on the input items array */
 170     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 171         free( p_del->pp_children );
 172         free( p_del );
 173     FOREACH_END();
 174     ARRAY_RESET( p_playlist->all_items );
 175
 176     FOREACH_ARRAY( input_item_t *p_del, p_playlist->input_items )
 177         input_ItemClean( p_del );
 178         free( p_del );
 179     FOREACH_END();
 180     ARRAY_RESET( p_playlist->input_items );
 181
 182     ARRAY_RESET( p_playlist->items );
 183     ARRAY_RESET( p_playlist->current );
 184
 185     PL_UNLOCK;
 186
 187     if( p_playlist->p_stats )
 188         free( p_playlist->p_stats );
 189
 190     vlc_mutex_destroy( &p_playlist->gc_lock );
 191     vlc_object_destroy( p_playlist->p_preparse );
 192     vlc_object_destroy( p_playlist->p_secondary_preparse );
 193     vlc_object_detach( p_playlist );
 194     vlc_object_destroy( p_playlist );
 195
 196 }
 197 /* Destroy remaining objects */
 198 static mtime_t ObjectGarbageCollector( playlist_t *p_playlist, int i_type,
 199                                        mtime_t destroy_date )
 200 {
 201     vlc_object_t *p_obj;
 202
 203     if( destroy_date > mdate() ) return destroy_date;
 204
 205     if( destroy_date == 0 )
 206     {
 207         /* give a little time */
 208         return mdate() + I64C(1000000);
 209     }
 210     else
 211     {
 212         vlc_mutex_lock( &p_playlist->gc_lock );
 213         while( ( p_obj = vlc_object_find( p_playlist, i_type, FIND_CHILD ) ) )
 214         {
 215             if( p_obj->p_parent != (vlc_object_t*)p_playlist )
 216             {
 217                 /* only first child (ie unused) */
 218                 vlc_object_release( p_obj );
 219                 break;
 220             }
 221             if( i_type == VLC_OBJECT_VOUT )
 222             {
 223                 msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 224                 vlc_object_detach( p_obj );
 225                 vlc_object_release( p_obj );
 226                 vout_Destroy( (vout_thread_t *)p_obj );
 227             }
 228             else if( i_type == VLC_OBJECT_SOUT )
 229             {
 230                 vlc_object_release( p_obj );
 231                 sout_DeleteInstance( (sout_instance_t*)p_obj );
 232             }
 233         }
 234         vlc_mutex_unlock( &p_playlist->gc_lock );
 235         return 0;
 236     }
 237 }
 238
 239 /** Main loop for the playlist */
 240 void playlist_MainLoop( playlist_t *p_playlist )
 241 {
 242     playlist_item_t *p_item = NULL;
 243     vlc_bool_t b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 244     PL_LOCK;
 245
 246     /* First, check if we have something to do */
 247     /* FIXME : this can be called several times */
 248     if( p_playlist->request.b_request )
 249     {
 250         /* Stop the existing input */
 251         if( p_playlist->p_input && !p_playlist->p_input->b_die )
 252         {
 253             PL_DEBUG( "incoming request - stopping current input" );
 254             input_StopThread( p_playlist->p_input );
 255         }
 256     }
 257
 258     /* If there is an input, check that it doesn't need to die. */
 259     if( p_playlist->p_input )
 260     {
 261         /* This input is dead. Remove it ! */
 262         if( p_playlist->p_input->b_dead )
 263         {
 264             int i_activity;
 265             input_thread_t *p_input;
 266             PL_DEBUG( "dead input" );
 267
 268             p_input = p_playlist->p_input;
 269             p_playlist->p_input = NULL;
 270
 271             /* Release the playlist lock, because we may get stuck
 272              * in input_DestroyThread() for some time. */
 273             PL_UNLOCK
 274
 275             /* Destroy input */
 276             input_DestroyThread( p_input );
 277
 278             /* Unlink current input
 279              * (_after_ input_DestroyThread for vout garbage collector) */
 280             vlc_object_detach( p_input );
 281
 282             /* Destroy object */
 283             vlc_object_destroy( p_input );
 284
 285             p_playlist->i_vout_destroyed_date = 0;
 286             p_playlist->i_sout_destroyed_date = 0;
 287
 288             if( p_playlist->status.p_item->i_flags
 289                 & PLAYLIST_REMOVE_FLAG )
 290             {
 291                  PL_DEBUG( "%s was marked for deletion, deleting",
 292                                  PLI_NAME( p_playlist->status.p_item  ) );
 293                  playlist_ItemDelete( p_playlist->status.p_item );
 294                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 295                      p_playlist->request.p_item = NULL;
 296                  p_playlist->status.p_item = NULL;
 297             }
 298
 299             i_activity= var_GetInteger( p_playlist, "activity") ;
 300             var_SetInteger( p_playlist, "activity", i_activity -
 301                             DEFAULT_INPUT_ACTIVITY );
 302
 303             return;
 304         }
 305         /* This input is dying, let it do */
 306         else if( p_playlist->p_input->b_die )
 307         {
 308             PL_DEBUG( "dying input" );
 309         }
 310         /* This input has finished, ask it to die ! */
 311         else if( p_playlist->p_input->b_error
 312                   || p_playlist->p_input->b_eof )
 313         {
 314             PL_DEBUG( "finished input" );
 315             input_StopThread( p_playlist->p_input );
 316             /* Select the next playlist item */
 317             PL_UNLOCK
 318             return;
 319         }
 320         else if( p_playlist->p_input->i_state != INIT_S )
 321         {
 322             PL_UNLOCK;
 323             p_playlist->i_vout_destroyed_date =
 324                 ObjectGarbageCollector( p_playlist, VLC_OBJECT_VOUT,
 325                                         p_playlist->i_vout_destroyed_date );
 326             p_playlist->i_sout_destroyed_date =
 327                 ObjectGarbageCollector( p_playlist, VLC_OBJECT_SOUT,
 328                                         p_playlist->i_sout_destroyed_date );
 329             PL_LOCK
 330         }
 331     }
 332     else
 333     {
 334         /* No input. Several cases
 335          *  - No request, running status -> start new item
 336          *  - No request, stopped status -> collect garbage
 337          *  - Request, running requested -> start new item
 338          *  - Request, stopped requested -> collect garbage
 339          */
 340          if( (!p_playlist->request.b_request &&
 341               p_playlist->status.i_status != PLAYLIST_STOPPED) ||
 342               ( p_playlist->request.b_request &&
 343                 p_playlist->request.i_status != PLAYLIST_STOPPED ) )
 344          {
 345              msg_Dbg( p_playlist, "starting new item" );
 346              stats_TimerStart( p_playlist, "Playlist walk",
 347                                   STATS_TIMER_PLAYLIST_WALK );
 348              p_item = playlist_NextItem( p_playlist );
 349              stats_TimerStop( p_playlist, STATS_TIMER_PLAYLIST_WALK );
 350
 351              if( p_item == NULL )
 352              {
 353                 msg_Dbg( p_playlist, "nothing to play" );
 354                 if( b_playexit == VLC_TRUE )
 355                 {
 356                     msg_Info( p_playlist, "end of playlist, exiting" );
 357                     p_playlist->p_libvlc->b_die = VLC_TRUE;
 358                 }
 359                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 360                 PL_UNLOCK
 361                 return;
 362              }
 363              playlist_PlayItem( p_playlist, p_item );
 364          }
 365          else
 366          {
 367              p_playlist->status.i_status = PLAYLIST_STOPPED;
 368              if( p_playlist->status.p_item &&
 369                  p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 370              {
 371                  PL_DEBUG( "deleting item marked for deletion" );
 372                  playlist_ItemDelete( p_playlist->status.p_item );
 373                  p_playlist->status.p_item = NULL;
 374              }
 375
 376              /* Collect garbage */
 377              PL_UNLOCK
 378              p_playlist->i_sout_destroyed_date =
 379              ObjectGarbageCollector( p_playlist, VLC_OBJECT_SOUT, mdate() );
 380              p_playlist->i_vout_destroyed_date =
 381              ObjectGarbageCollector( p_playlist, VLC_OBJECT_VOUT, mdate() );
 382              PL_LOCK
 383          }
 384     }
 385     PL_UNLOCK
 386 }
 387
 388 /** Playlist dying last loop */
 389 void playlist_LastLoop( playlist_t *p_playlist )
 390 {
 391     vlc_object_t *p_obj;
 392
 393     /* If there is an input, kill it */
 394     while( 1 )
 395     {
 396         PL_LOCK
 397
 398         if( p_playlist->p_input == NULL )
 399         {
 400             PL_UNLOCK
 401             break;
 402         }
 403
 404         if( p_playlist->p_input->b_dead )
 405         {
 406             input_thread_t *p_input;
 407
 408             /* Unlink current input */
 409             p_input = p_playlist->p_input;
 410             p_playlist->p_input = NULL;
 411             PL_UNLOCK
 412
 413             /* Destroy input */
 414             input_DestroyThread( p_input );
 415             /* Unlink current input (_after_ input_DestroyThread for vout
 416              * garbage collector)*/
 417             vlc_object_detach( p_input );
 418
 419             /* Destroy object */
 420             vlc_object_destroy( p_input );
 421             continue;
 422         }
 423         else if( p_playlist->p_input->b_die )
 424         {
 425             /* This input is dying, leave it alone */
 426             ;
 427         }
 428         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 429         {
 430             input_StopThread( p_playlist->p_input );
 431             PL_UNLOCK
 432             continue;
 433         }
 434         else
 435         {
 436             p_playlist->p_input->b_eof = 1;
 437         }
 438
 439         PL_UNLOCK
 440
 441         msleep( INTF_IDLE_SLEEP );
 442     }
 443
 444     /* close all remaining sout */
 445     while( ( p_obj = vlc_object_find( p_playlist,
 446                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 447     {
 448         vlc_object_release( p_obj );
 449         sout_DeleteInstance( (sout_instance_t*)p_obj );
 450     }
 451
 452     /* close all remaining vout */
 453     while( ( p_obj = vlc_object_find( p_playlist,
 454                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 455     {
 456         vlc_object_detach( p_obj );
 457         vlc_object_release( p_obj );
 458         vout_Destroy( (vout_thread_t *)p_obj );
 459     }
 460 }
 461
 462 /** Main loop for preparser queue */
 463 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 464 {
 465     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 466     input_item_t *p_current;
 467     int i_activity;
 468     uint32_t i_m, i_o;
 469
 470     while( !p_playlist->b_die )
 471     {
 472         vlc_mutex_lock( &p_obj->object_lock );
 473         while( p_obj->i_waiting == 0 )
 474         {
 475             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 476             if( p_playlist->b_die )
 477             {
 478                 vlc_mutex_unlock( &p_obj->object_lock );
 479                 return;
 480             }
 481         }
 482
 483         p_current = p_obj->pp_waiting[0];
 484         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 485         vlc_mutex_unlock( &p_obj->object_lock );
 486
 487         PL_LOCK;
 488         if( p_current )
 489         {
 490             vlc_bool_t b_preparsed = VLC_FALSE;
 491             if( strncmp( p_current->psz_uri, "http:", 5 ) &&
 492                 strncmp( p_current->psz_uri, "rtsp:", 5 ) &&
 493                 strncmp( p_current->psz_uri, "udp:", 4 ) &&
 494                 strncmp( p_current->psz_uri, "mms:", 4 ) &&
 495                 strncmp( p_current->psz_uri, "cdda:", 4 ) &&
 496                 strncmp( p_current->psz_uri, "dvd:", 4 ) &&
 497                 strncmp( p_current->psz_uri, "v4l:", 4 ) &&
 498                 strncmp( p_current->psz_uri, "dshow:", 6 ) )
 499             {
 500                 b_preparsed = VLC_TRUE;
 501                 stats_TimerStart( p_playlist, "Preparse run",
 502                                   STATS_TIMER_PREPARSE );
 503                 PL_UNLOCK;
 504                 input_Preparse( p_playlist, p_current );
 505                 PL_LOCK;
 506                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 507             }
 508             PL_UNLOCK;
 509             if( b_preparsed )
 510             {
 511                 p_current->p_meta->i_status |= ITEM_PREPARSED;
 512                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 513             }
 514             PL_LOCK;
 515
 516             /* If we haven't retrieved enough meta, add to secondary queue
 517              * which will run the "meta fetchers"
 518              * TODO:
 519              *  don't do this for things we won't get meta for, like
 520              *  videos
 521              */
 522             if( !input_MetaSatisfied( p_playlist, p_current, &i_m, &i_o,
 523                                       VLC_TRUE ) )
 524             {
 525                 preparse_item_t p;
 526                 p.p_item = p_current;
 527                 p.b_fetch_art = VLC_FALSE;
 528                 vlc_mutex_lock( &p_playlist->p_secondary_preparse->object_lock);
 529                 INSERT_ELEM( p_playlist->p_secondary_preparse->p_waiting,
 530                              p_playlist->p_secondary_preparse->i_waiting,
 531                              p_playlist->p_secondary_preparse->i_waiting,
 532                              p );
 533                 vlc_mutex_unlock(
 534                             &p_playlist->p_secondary_preparse->object_lock);
 535                 vlc_cond_signal(
 536                             &p_playlist->p_secondary_preparse->object_wait );
 537             }
 538             else
 539                 vlc_gc_decref( p_current );
 540             PL_UNLOCK;
 541         }
 542         else
 543             PL_UNLOCK;
 544
 545         vlc_mutex_lock( &p_obj->object_lock );
 546         i_activity = var_GetInteger( p_playlist, "activity" );
 547         if( i_activity < 0 ) i_activity = 0;
 548         vlc_mutex_unlock( &p_obj->object_lock );
 549         /* Sleep at least 1ms */
 550         msleep( (i_activity+1) * 1000 );
 551     }
 552 }
 553
 554 /** Main loop for secondary preparser queue */
 555 void playlist_SecondaryPreparseLoop( playlist_secondary_preparse_t *p_obj )
 556 {
 557     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 558     vlc_bool_t b_fetch_art;
 559     input_item_t *p_item;
 560     int i_activity;
 561
 562     while( !p_playlist->b_die )
 563     {
 564         vlc_mutex_lock( &p_obj->object_lock );
 565         while( p_obj->i_waiting == 0 )
 566         {
 567             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 568             if( p_playlist->b_die )
 569             {
 570                 vlc_mutex_unlock( &p_obj->object_lock );
 571                 return;
 572             }
 573         }
 574
 575         b_fetch_art = p_obj->p_waiting->b_fetch_art;
 576         p_item = p_obj->p_waiting->p_item;
 577         REMOVE_ELEM( p_obj->p_waiting, p_obj->i_waiting, 0 );
 578         vlc_mutex_unlock( &p_obj->object_lock );
 579         if( p_item )
 580         {
 581             if( !b_fetch_art )
 582             {
 583                 input_MetaFetch( p_playlist, p_item );
 584                 p_item->p_meta->i_status |= ITEM_META_FETCHED;
 585                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 586                 /*  Fetch right now */
 587                 if( var_GetInteger( p_playlist, "album-art" ) == ALBUM_ART_ALL )
 588                 {
 589                     vlc_mutex_lock( &p_obj->object_lock );
 590                     preparse_item_t p;
 591                     p.p_item = p_item;
 592                     p.b_fetch_art = VLC_TRUE;
 593                     INSERT_ELEM( p_playlist->p_secondary_preparse->p_waiting,
 594                                  p_playlist->p_secondary_preparse->i_waiting,
 595                                  0, p );
 596                     vlc_mutex_unlock( &p_obj->object_lock );
 597                 }
 598                 else
 599                     vlc_gc_decref( p_item );
 600             }
 601             else
 602             {
 603                 input_ArtFetch( p_playlist, p_item );
 604                 p_item->p_meta->i_status |= ITEM_ART_FETCHED;
 605                 vlc_gc_decref( p_item );
 606            }
 607         }
 608         vlc_mutex_lock( &p_obj->object_lock );
 609         i_activity = var_GetInteger( p_playlist, "activity" );
 610         if( i_activity < 0 ) i_activity = 0;
 611         vlc_mutex_unlock( &p_obj->object_lock );
 612         /* Sleep at least 1ms */
 613         msleep( (i_activity+1) * 1000 );
 614     }
 615 }
 616
 617 static void VariablesInit( playlist_t *p_playlist )
 618 {
 619     vlc_value_t val;
 620     /* These variables control updates */
 621     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 622     val.b_bool = VLC_TRUE;
 623     var_Set( p_playlist, "intf-change", val );
 624
 625     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 626     val.i_int = -1;
 627     var_Set( p_playlist, "item-change", val );
 628
 629     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 630     val.i_int = -1;
 631     var_Set( p_playlist, "item-deleted", val );
 632
 633     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 634
 635     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 636     val.i_int = -1;
 637     var_Set( p_playlist, "playlist-current", val );
 638
 639     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 640
 641     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 642     val.b_bool = VLC_TRUE;
 643     var_Set( p_playlist, "intf-show", val );
 644
 645     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 646     var_SetInteger( p_playlist, "activity", 0 );
 647
 648     /* Variables to control playback */
 649     var_CreateGetBool( p_playlist, "play-and-stop" );
 650     var_CreateGetBool( p_playlist, "play-and-exit" );
 651     var_CreateGetBool( p_playlist, "random" );
 652     var_CreateGetBool( p_playlist, "repeat" );
 653     var_CreateGetBool( p_playlist, "loop" );
 654
 655     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 656 }