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) 1999-2007 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
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  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 static void playlist_Destructor( vlc_object_t * p_this );
  43
  44 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
  45                            vlc_value_t oldval, vlc_value_t newval, void *a )
  46 {
  47     (void)psz_cmd; (void)oldval; (void)newval; (void)a;
  48
  49     ((playlist_t*)p_this)->b_reset_currently_playing = true;
  50     playlist_Signal( ((playlist_t*)p_this) );
  51     return VLC_SUCCESS;
  52 }
  53
  54 /**
  55  * Create playlist
  56  *
  57  * Create a playlist structure.
  58  * \param p_parent the vlc object that is to be the parent of this playlist
  59  * \return a pointer to the created playlist, or NULL on error
  60  */
  61 playlist_t * playlist_Create( vlc_object_t *p_parent )
  62 {
  63     static const char playlist_name[] = "playlist";
  64     playlist_t *p_playlist;
  65     bool b_save;
  66
  67     /* Allocate structure */
  68     p_playlist = vlc_custom_create( p_parent, sizeof( *p_playlist ),
  69                                     VLC_OBJECT_GENERIC, playlist_name );
  70     if( !p_playlist )
  71         return NULL;
  72
  73     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
  74
  75     libvlc_priv(p_parent->p_libvlc)->p_playlist = p_playlist;
  76
  77     VariablesInit( p_playlist );
  78
  79     /* Initialise data structures */
  80     vlc_mutex_init( &p_playlist->gc_lock );
  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->current );
  90
  91     p_playlist->i_current_index = 0;
  92     p_playlist->b_reset_currently_playing = true;
  93     p_playlist->last_rebuild_date = 0;
  94
  95     p_playlist->b_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  96
  97     p_playlist->b_doing_ml = false;
  98
  99     p_playlist->b_auto_preparse =
 100                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
 101
 102     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 103                                     0, NULL );
 104     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 105                                     0, p_playlist->p_root_category->p_input );
 106
 107     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 108         return NULL;
 109
 110     /* Create playlist and media library */
 111     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 112                             &p_playlist->p_local_category,
 113                             &p_playlist->p_local_onelevel, false );
 114
 115     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 116     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 117
 118     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 119         !p_playlist->p_local_category->p_input ||
 120         !p_playlist->p_local_onelevel->p_input )
 121         return NULL;
 122
 123     if( config_GetInt( p_playlist, "media-library") )
 124     {
 125         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 126                             &p_playlist->p_ml_category,
 127                             &p_playlist->p_ml_onelevel, false );
 128
 129         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 130             return NULL;
 131
 132         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 133         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 134     }
 135     else
 136     {
 137         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 138     }
 139
 140     /* Initial status */
 141     p_playlist->status.p_item = NULL;
 142     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 143     p_playlist->request.b_request = false;
 144     p_playlist->status.i_status = PLAYLIST_STOPPED;
 145
 146     p_playlist->i_sort = SORT_ID;
 147     p_playlist->i_order = ORDER_NORMAL;
 148
 149
 150     b_save = p_playlist->b_auto_preparse;
 151     p_playlist->b_auto_preparse = false;
 152     playlist_MLLoad( p_playlist );
 153     p_playlist->b_auto_preparse = true;
 154
 155     vlc_object_set_destructor( p_playlist, playlist_Destructor );
 156
 157     return p_playlist;
 158 }
 159
 160 /**
 161  * Destroy playlist
 162  *
 163  * Destroy a playlist structure.
 164  * \param p_playlist the playlist object
 165  * \return nothing
 166  */
 167
 168 static void playlist_Destructor( vlc_object_t * p_this )
 169 {
 170     playlist_t * p_playlist = (playlist_t *)p_this;
 171
 172     if( p_playlist->p_preparse )
 173         vlc_object_release( p_playlist->p_preparse );
 174
 175     if( p_playlist->p_fetcher )
 176         vlc_object_release( p_playlist->p_fetcher );
 177 #ifndef NDEBUG
 178     libvlc_priv (p_this->p_libvlc)->p_playlist = NULL; /* pl_Yield() will fail */
 179 #endif
 180 }
 181
 182 /* Destroy remaining objects */
 183 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
 184 {
 185     vlc_object_t *p_obj;
 186
 187     if( !b_force )
 188     {
 189         if( mdate() - p_playlist->gc_date < 1000000 )
 190         {
 191             p_playlist->b_cant_sleep = true;
 192             return;
 193         }
 194         else if( p_playlist->gc_date == 0 )
 195             return;
 196     }
 197
 198     vlc_mutex_lock( &p_playlist->gc_lock );
 199     p_playlist->b_cant_sleep = false;
 200     vlc_mutex_unlock( &p_playlist->gc_lock );
 201 }
 202
 203 /* Input Callback */
 204 static void input_state_changed( const vlc_event_t * event, void * data )
 205 {
 206     (void)event;
 207     playlist_t * p_playlist = data;
 208     playlist_Signal( p_playlist );
 209 }
 210
 211 /* Input Callback */
 212 static void input_selected_stream_changed( const vlc_event_t * event, void * data )
 213 {
 214     (void)event;
 215     playlist_t * p_playlist = data;
 216     PL_LOCK;
 217     p_playlist->gc_date = mdate();
 218     vlc_object_signal_unlocked( p_playlist );
 219     PL_UNLOCK;
 220 }
 221
 222 /* Internals */
 223 void playlist_release_current_input( playlist_t * p_playlist )
 224 {
 225     vlc_assert_locked( &(vlc_internals(p_playlist)->lock) );
 226
 227     if( !p_playlist->p_input ) return;
 228
 229     input_thread_t * p_input = p_playlist->p_input;
 230     vlc_event_manager_t * p_em = input_get_event_manager( p_input );
 231
 232     vlc_event_detach( p_em, vlc_InputStateChanged,
 233                       input_state_changed, p_playlist );
 234     vlc_event_detach( p_em, vlc_InputSelectedStreamChanged,
 235                       input_selected_stream_changed, p_playlist );
 236     p_playlist->p_input = NULL;
 237
 238     /* Release the playlist lock, because we may get stuck
 239      * in vlc_object_release() for some time. */
 240     PL_UNLOCK;
 241     vlc_object_release( p_input );
 242     PL_LOCK;
 243 }
 244
 245 void playlist_set_current_input(
 246     playlist_t * p_playlist, input_thread_t * p_input )
 247 {
 248     vlc_assert_locked( &(vlc_internals(p_playlist)->lock) );
 249
 250     playlist_release_current_input( p_playlist );
 251
 252     if( p_input )
 253     {
 254         vlc_object_yield( p_input );
 255         p_playlist->p_input = p_input;
 256         vlc_event_manager_t * p_em = input_get_event_manager( p_input );
 257         vlc_event_attach( p_em, vlc_InputStateChanged,
 258                           input_state_changed, p_playlist );
 259         vlc_event_attach( p_em, vlc_InputSelectedStreamChanged,
 260                           input_selected_stream_changed, p_playlist );
 261     }
 262 }
 263
 264
 265 /**
 266  * @}
 267  */
 268
 269 /**
 270  * Main loop
 271  *
 272  * Main loop for the playlist
 273  * \param p_playlist the playlist object
 274  * \return nothing
 275  */
 276 void playlist_MainLoop( playlist_t *p_playlist )
 277 {
 278     playlist_item_t *p_item = NULL;
 279     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 280     PL_LOCK;
 281
 282     if( p_playlist->b_reset_currently_playing &&
 283         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 284     {
 285         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 286                              p_playlist->status.p_item );
 287         p_playlist->last_rebuild_date = mdate();
 288     }
 289
 290 check_input:
 291     /* If there is an input, check that it doesn't need to die. */
 292     if( p_playlist->p_input )
 293     {
 294         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 295         {
 296             PL_DEBUG( "incoming request - stopping current input" );
 297             input_StopThread( p_playlist->p_input );
 298         }
 299
 300         /* This input is dead. Remove it ! */
 301         if( p_playlist->p_input->b_dead )
 302         {
 303             int i_activity;
 304             input_thread_t *p_input;
 305             sout_instance_t **pp_sout =
 306                 &libvlc_priv(p_playlist->p_libvlc)->p_sout;
 307
 308             PL_DEBUG( "dead input" );
 309
 310             p_input = p_playlist->p_input;
 311
 312             assert( *pp_sout == NULL );
 313             if( var_CreateGetBool( p_input, "sout-keep" ) )
 314                 *pp_sout = input_DetachSout( p_input );
 315
 316             /* Destroy input */
 317             playlist_release_current_input( p_playlist );
 318
 319             p_playlist->gc_date = mdate();
 320             p_playlist->b_cant_sleep = true;
 321
 322             if( p_playlist->status.p_item->i_flags
 323                 & PLAYLIST_REMOVE_FLAG )
 324             {
 325                  PL_DEBUG( "%s was marked for deletion, deleting",
 326                                  PLI_NAME( p_playlist->status.p_item  ) );
 327                  playlist_ItemDelete( p_playlist->status.p_item );
 328                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 329                      p_playlist->request.p_item = NULL;
 330                  p_playlist->status.p_item = NULL;
 331             }
 332
 333             i_activity= var_GetInteger( p_playlist, "activity" );
 334             var_SetInteger( p_playlist, "activity", i_activity -
 335                             DEFAULT_INPUT_ACTIVITY );
 336
 337             goto check_input;
 338         }
 339         /* This input is dying, let it do */
 340         else if( p_playlist->p_input->b_die )
 341         {
 342             PL_DEBUG( "dying input" );
 343             PL_UNLOCK;
 344             msleep( INTF_IDLE_SLEEP );
 345             PL_LOCK;
 346             goto check_input;
 347         }
 348         /* This input has finished, ask it to die ! */
 349         else if( p_playlist->p_input->b_error
 350                   || p_playlist->p_input->b_eof )
 351         {
 352             PL_DEBUG( "finished input" );
 353             input_StopThread( p_playlist->p_input );
 354             /* No need to wait here, we'll wait in the p_input->b_die case */
 355             goto check_input;
 356         }
 357         else if( p_playlist->p_input->i_state != INIT_S )
 358         {
 359             PL_UNLOCK;
 360             ObjectGarbageCollector( p_playlist, false );
 361             PL_LOCK;
 362         }
 363     }
 364     else
 365     {
 366         /* No input. Several cases
 367          *  - No request, running status -> start new item
 368          *  - No request, stopped status -> collect garbage
 369          *  - Request, running requested -> start new item
 370          *  - Request, stopped requested -> collect garbage
 371         */
 372         int i_status = p_playlist->request.b_request ?
 373             p_playlist->request.i_status : p_playlist->status.i_status;
 374         if( i_status != PLAYLIST_STOPPED )
 375         {
 376             msg_Dbg( p_playlist, "starting new item" );
 377             p_item = playlist_NextItem( p_playlist );
 378
 379             if( p_item == NULL )
 380             {
 381                 msg_Dbg( p_playlist, "nothing to play" );
 382                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 383                 PL_UNLOCK;
 384
 385                 if( b_playexit == true )
 386                 {
 387                     msg_Info( p_playlist, "end of playlist, exiting" );
 388                     vlc_object_kill( p_playlist->p_libvlc );
 389                 }
 390                 ObjectGarbageCollector( p_playlist, true );
 391                 return;
 392              }
 393              playlist_PlayItem( p_playlist, p_item );
 394          }
 395          else
 396          {
 397             const bool b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 398
 399             p_playlist->status.i_status = PLAYLIST_STOPPED;
 400             if( p_playlist->status.p_item &&
 401                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 402             {
 403                 PL_DEBUG( "deleting item marked for deletion" );
 404                 playlist_ItemDelete( p_playlist->status.p_item );
 405                 p_playlist->status.p_item = NULL;
 406             }
 407
 408             /* Collect garbage */
 409             PL_UNLOCK;
 410             ObjectGarbageCollector( p_playlist, b_gc_forced );
 411             PL_LOCK;
 412         }
 413     }
 414     PL_UNLOCK;
 415 }
 416
 417 /**
 418  * Last loop
 419  *
 420  * The playlist is dying so do the last loop
 421  * \param p_playlist the playlist object
 422  * \return nothing
 423 */
 424 void playlist_LastLoop( playlist_t *p_playlist )
 425 {
 426     vlc_object_t *p_obj;
 427
 428     /* If there is an input, kill it */
 429     while( 1 )
 430     {
 431         PL_LOCK;
 432         if( p_playlist->p_input == NULL )
 433         {
 434             PL_UNLOCK;
 435             break;
 436         }
 437
 438         if( p_playlist->p_input->b_dead )
 439         {
 440             /* remove input */
 441             playlist_release_current_input( p_playlist );
 442
 443             /* sout-keep: no need to anything here.
 444              * The last input will destroy its sout, if any, by itself */
 445
 446             PL_UNLOCK;
 447             continue;
 448         }
 449         else if( p_playlist->p_input->b_die )
 450         {
 451             /* This input is dying, leave it alone */
 452             ;
 453         }
 454         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 455         {
 456             input_StopThread( p_playlist->p_input );
 457             PL_UNLOCK;
 458             continue;
 459         }
 460         else
 461         {
 462             p_playlist->p_input->b_eof = 1;
 463         }
 464         PL_UNLOCK;
 465
 466         msleep( INTF_IDLE_SLEEP );
 467     }
 468
 469 #ifdef ENABLE_SOUT
 470     /* close the remaining sout-keep (if there was no input atm) */
 471     sout_instance_t *p_sout = libvlc_priv (p_playlist->p_libvlc)->p_sout;
 472     if (p_sout)
 473         sout_DeleteInstance( p_sout );
 474 #endif
 475
 476     /* Core should have terminated all SDs before the playlist */
 477     /* TODO: It fails to do so when not playing anything -- Courmisch */
 478     playlist_ServicesDiscoveryKillAll( p_playlist );
 479     playlist_MLDump( p_playlist );
 480
 481     PL_LOCK;
 482     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 483         free( p_del->pp_children );
 484         vlc_gc_decref( p_del->p_input );
 485         free( p_del );
 486     FOREACH_END();
 487     ARRAY_RESET( p_playlist->all_items );
 488
 489     ARRAY_RESET( p_playlist->items );
 490     ARRAY_RESET( p_playlist->current );
 491
 492     PL_UNLOCK;
 493 }
 494
 495 /**
 496  * Preparse loop
 497  *
 498  * Main loop for preparser queue
 499  * \param p_obj items to preparse
 500  * \return nothing
 501  */
 502 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 503 {
 504     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 505     input_item_t *p_current;
 506     int i_activity;
 507
 508     vlc_object_lock( p_obj );
 509
 510     while( vlc_object_alive( p_obj ) )
 511     {
 512         if( p_obj->i_waiting == 0 )
 513         {
 514             vlc_object_wait( p_obj );
 515             continue;
 516         }
 517
 518         p_current = p_obj->pp_waiting[0];
 519         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 520         vlc_object_unlock( p_obj );
 521
 522         PL_LOCK;
 523         if( p_current )
 524         {
 525             if( p_current->i_type == ITEM_TYPE_FILE )
 526             {
 527                 stats_TimerStart( p_playlist, "Preparse run",
 528                                   STATS_TIMER_PREPARSE );
 529                 /* Do not preparse if it is already done (like by playing it) */
 530                 if( !input_item_IsPreparsed( p_current ) )
 531                 {
 532                     PL_UNLOCK;
 533                     input_Preparse( p_playlist, p_current );
 534                     PL_LOCK;
 535                 }
 536                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 537                 PL_UNLOCK;
 538                 input_item_SetPreparsed( p_current, true );
 539                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 540                 PL_LOCK;
 541             }
 542             /* If we haven't retrieved enough meta, add to secondary queue
 543              * which will run the "meta fetchers".
 544              * This only checks for meta, not for art
 545              * \todo don't do this for things we won't get meta for, like vids
 546              */
 547             char *psz_arturl = input_item_GetArtURL( p_current );
 548             char *psz_name = input_item_GetName( p_current );
 549             if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 550                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 551             {
 552                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 553                 vlc_object_lock( p_playlist->p_fetcher );
 554                 INSERT_ELEM( p_playlist->p_fetcher->pp_waiting,
 555                              p_playlist->p_fetcher->i_waiting,
 556                              p_playlist->p_fetcher->i_waiting, p_current);
 557                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 558                 vlc_object_unlock( p_playlist->p_fetcher );
 559             }
 560             else
 561             {
 562                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 563                           psz_name, psz_arturl );
 564                 vlc_gc_decref( p_current );
 565             }
 566             free( psz_name );
 567             free( psz_arturl );
 568             PL_UNLOCK;
 569         }
 570         else
 571             PL_UNLOCK;
 572
 573         vlc_object_lock( p_obj );
 574         i_activity = var_GetInteger( p_playlist, "activity" );
 575         if( i_activity < 0 ) i_activity = 0;
 576         vlc_object_unlock( p_obj );
 577         /* Sleep at least 1ms */
 578         msleep( (i_activity+1) * 1000 );
 579         vlc_object_lock( p_obj );
 580     }
 581     vlc_object_unlock( p_obj );
 582 }
 583
 584 /**
 585  * Fetcher loop
 586  *
 587  * Main loop for secondary preparser queue
 588  * \param p_obj items to preparse
 589  * \return nothing
 590  */
 591 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 592 {
 593     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 594     input_item_t *p_item;
 595     int i_activity;
 596
 597     vlc_object_lock( p_obj );
 598
 599     while( vlc_object_alive( p_obj ) )
 600     {
 601         if( p_obj->i_waiting == 0 )
 602         {
 603             vlc_object_wait( p_obj );
 604             continue;
 605         }
 606
 607         p_item = p_obj->pp_waiting[0];
 608         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 609         vlc_object_unlock( p_obj );
 610         if( p_item )
 611         {
 612             int i_ret;
 613
 614             /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 615              * (This can happen if we fetch art on play)
 616              * FIXME this doesn't work if we need to fetch meta before art ... */
 617             for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 618             {
 619                 bool b_break;
 620                 PL_LOCK;
 621                 b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 622                             p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 623                 PL_UNLOCK;
 624                 if( b_break )
 625                     break;
 626                 msleep( 50000 );
 627             }
 628
 629             i_ret = input_ArtFind( p_playlist, p_item );
 630             if( i_ret == 1 )
 631             {
 632                 PL_DEBUG( "downloading art for %s", p_item->psz_name );
 633                 if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 634                     input_item_SetArtNotFound( p_item, true );
 635                 else {
 636                     input_item_SetArtFetched( p_item, true );
 637                     var_SetInteger( p_playlist, "item-change",
 638                                     p_item->i_id );
 639                 }
 640             }
 641             else if( i_ret == 0 ) /* Was in cache */
 642             {
 643                 PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 644                 input_item_SetArtFetched( p_item, true );
 645                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 646             }
 647             else
 648             {
 649                 PL_DEBUG( "art not found for %s", p_item->psz_name );
 650                 input_item_SetArtNotFound( p_item, true );
 651             }
 652             vlc_gc_decref( p_item );
 653         }
 654         vlc_object_lock( p_obj );
 655         i_activity = var_GetInteger( p_playlist, "activity" );
 656         if( i_activity < 0 ) i_activity = 0;
 657         vlc_object_unlock( p_obj );
 658         /* Sleep at least 1ms */
 659         msleep( (i_activity+1) * 1000 );
 660         vlc_object_lock( p_obj );
 661     }
 662     vlc_object_unlock( p_obj );
 663 }
 664
 665 static void VariablesInit( playlist_t *p_playlist )
 666 {
 667     vlc_value_t val;
 668     /* These variables control updates */
 669     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 670     val.b_bool = true;
 671     var_Set( p_playlist, "intf-change", val );
 672
 673     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 674     val.i_int = -1;
 675     var_Set( p_playlist, "item-change", val );
 676
 677     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 678     val.i_int = -1;
 679     var_Set( p_playlist, "item-deleted", val );
 680
 681     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 682
 683     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 684     val.i_int = -1;
 685     var_Set( p_playlist, "playlist-current", val );
 686
 687     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 688
 689     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 690     var_SetInteger( p_playlist, "activity", 0 );
 691
 692     /* Variables to control playback */
 693     var_CreateGetBool( p_playlist, "play-and-stop" );
 694     var_CreateGetBool( p_playlist, "play-and-exit" );
 695     var_CreateGetBool( p_playlist, "random" );
 696     var_CreateGetBool( p_playlist, "repeat" );
 697     var_CreateGetBool( p_playlist, "loop" );
 698
 699     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 700 }