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