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