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