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 <vlc/vlc.h>
  30 #include <vlc_vout.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
  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_PLAYLIST, playlist_name );
  69     if( !p_playlist )
  70     {
  71         msg_Err( p_parent, "out of memory" );
  72         return NULL;
  73     }
  74
  75     TAB_INIT( p_playlist->i_sds, p_playlist->pp_sds );
  76
  77     libvlc_priv(p_parent->p_libvlc)->p_playlist = p_playlist;
  78
  79     VariablesInit( p_playlist );
  80
  81     /* Initialise data structures */
  82     vlc_mutex_init( &p_playlist->gc_lock );
  83     p_playlist->i_last_playlist_id = 0;
  84     p_playlist->p_input = NULL;
  85
  86     p_playlist->gc_date = 0;
  87     p_playlist->b_cant_sleep = false;
  88
  89     ARRAY_INIT( p_playlist->items );
  90     ARRAY_INIT( p_playlist->all_items );
  91     ARRAY_INIT( p_playlist->current );
  92
  93     p_playlist->i_current_index = 0;
  94     p_playlist->b_reset_currently_playing = true;
  95     p_playlist->last_rebuild_date = 0;
  96
  97     p_playlist->b_tree = var_CreateGetBool( p_playlist, "playlist-tree" );
  98
  99     p_playlist->b_doing_ml = false;
 100
 101     p_playlist->b_auto_preparse =
 102                         var_CreateGetBool( p_playlist, "auto-preparse" ) ;
 103
 104     p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
 105                                     0, NULL );
 106     p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
 107                                     0, p_playlist->p_root_category->p_input );
 108
 109     if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
 110         return NULL;
 111
 112     /* Create playlist and media library */
 113     playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
 114                             &p_playlist->p_local_category,
 115                             &p_playlist->p_local_onelevel, false );
 116
 117     p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
 118     p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 119
 120     if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
 121         !p_playlist->p_local_category->p_input ||
 122         !p_playlist->p_local_onelevel->p_input )
 123         return NULL;
 124
 125     if( config_GetInt( p_playlist, "media-library") )
 126     {
 127         playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
 128                             &p_playlist->p_ml_category,
 129                             &p_playlist->p_ml_onelevel, false );
 130
 131         if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
 132             return NULL;
 133
 134         p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
 135         p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
 136     }
 137     else
 138     {
 139         p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
 140     }
 141
 142     /* Initial status */
 143     p_playlist->status.p_item = NULL;
 144     p_playlist->status.p_node = p_playlist->p_local_onelevel;
 145     p_playlist->request.b_request = false;
 146     p_playlist->status.i_status = PLAYLIST_STOPPED;
 147
 148     p_playlist->i_sort = SORT_ID;
 149     p_playlist->i_order = ORDER_NORMAL;
 150
 151
 152     b_save = p_playlist->b_auto_preparse;
 153     p_playlist->b_auto_preparse = false;
 154     playlist_MLLoad( p_playlist );
 155     p_playlist->b_auto_preparse = true;
 156
 157     vlc_object_set_destructor( p_playlist, playlist_Destructor );
 158
 159     return p_playlist;
 160 }
 161
 162 /**
 163  * Destroy playlist
 164  *
 165  * Destroy a playlist structure.
 166  * \param p_playlist the playlist object
 167  * \return nothing
 168  */
 169
 170 static void playlist_Destructor( vlc_object_t * p_this )
 171 {
 172     playlist_t * p_playlist = (playlist_t *)p_this;
 173
 174     if( p_playlist->p_preparse )
 175         vlc_object_release( p_playlist->p_preparse );
 176
 177     if( p_playlist->p_fetcher )
 178         vlc_object_release( p_playlist->p_fetcher );
 179 }
 180
 181 /* Destroy remaining objects */
 182 static void ObjectGarbageCollector( playlist_t *p_playlist, bool b_force )
 183 {
 184     vlc_object_t *p_obj;
 185
 186     if( !b_force )
 187     {
 188         if( mdate() - p_playlist->gc_date < 1000000 )
 189         {
 190             p_playlist->b_cant_sleep = true;
 191             return;
 192         }
 193         else if( p_playlist->gc_date == 0 )
 194             return;
 195     }
 196
 197     vlc_mutex_lock( &p_playlist->gc_lock );
 198     while( ( p_obj = vlc_object_find( p_playlist->p_libvlc, VLC_OBJECT_VOUT,
 199                                                   FIND_CHILD ) ) )
 200     {
 201         if( p_obj->p_parent != VLC_OBJECT(p_playlist->p_libvlc) )
 202         {
 203             vlc_object_release( p_obj );
 204             break;
 205         }
 206         msg_Dbg( p_playlist, "garbage collector destroying 1 vout" );
 207         vlc_object_detach( p_obj );
 208         vlc_object_release( p_obj );
 209         vout_Destroy( (vout_thread_t *)p_obj );
 210     }
 211 #ifdef ENABLE_SOUT
 212     while( ( p_obj = vlc_object_find( p_playlist, VLC_OBJECT_SOUT,
 213                                                   FIND_CHILD ) ) )
 214     {
 215         if( p_obj->p_parent != VLC_OBJECT(p_playlist) )
 216         {
 217             vlc_object_release( p_obj );
 218             break;
 219         }
 220         msg_Dbg( p_playlist, "garbage collector destroying 1 sout" );
 221         vlc_object_detach( p_obj );
 222         vlc_object_release( p_obj );
 223         sout_DeleteInstance( (sout_instance_t*)p_obj );
 224     }
 225 #endif
 226     p_playlist->b_cant_sleep = false;
 227     vlc_mutex_unlock( &p_playlist->gc_lock );
 228 }
 229
 230 /**
 231  * Main loop
 232  *
 233  * Main loop for the playlist
 234  * \param p_playlist the playlist object
 235  * \return nothing
 236  */
 237 void playlist_MainLoop( playlist_t *p_playlist )
 238 {
 239     playlist_item_t *p_item = NULL;
 240     bool b_playexit = var_GetBool( p_playlist, "play-and-exit" );
 241     PL_LOCK;
 242
 243     if( p_playlist->b_reset_currently_playing &&
 244         mdate() - p_playlist->last_rebuild_date > 30000 ) // 30 ms
 245     {
 246         ResetCurrentlyPlaying( p_playlist, var_GetBool( p_playlist, "random" ),
 247                              p_playlist->status.p_item );
 248         p_playlist->last_rebuild_date = mdate();
 249     }
 250
 251 check_input:
 252     /* If there is an input, check that it doesn't need to die. */
 253     if( p_playlist->p_input )
 254     {
 255         if( p_playlist->request.b_request && !p_playlist->p_input->b_die )
 256         {
 257             PL_DEBUG( "incoming request - stopping current input" );
 258             input_StopThread( p_playlist->p_input );
 259         }
 260
 261         /* This input is dead. Remove it ! */
 262         if( p_playlist->p_input->b_dead )
 263         {
 264             int i_activity;
 265             input_thread_t *p_input;
 266             PL_DEBUG( "dead input" );
 267
 268             p_input = p_playlist->p_input;
 269             p_playlist->p_input = NULL;
 270
 271             /* Release the playlist lock, because we may get stuck
 272              * in vlc_object_release() for some time. */
 273             PL_UNLOCK;
 274
 275             /* Destroy input */
 276             vlc_object_release( p_input );
 277
 278             PL_LOCK;
 279
 280             p_playlist->gc_date = mdate();
 281             p_playlist->b_cant_sleep = true;
 282
 283             if( p_playlist->status.p_item->i_flags
 284                 & PLAYLIST_REMOVE_FLAG )
 285             {
 286                  PL_DEBUG( "%s was marked for deletion, deleting",
 287                                  PLI_NAME( p_playlist->status.p_item  ) );
 288                  playlist_ItemDelete( p_playlist->status.p_item );
 289                  if( p_playlist->request.p_item == p_playlist->status.p_item )
 290                      p_playlist->request.p_item = NULL;
 291                  p_playlist->status.p_item = NULL;
 292             }
 293
 294             i_activity= var_GetInteger( p_playlist, "activity" );
 295             var_SetInteger( p_playlist, "activity", i_activity -
 296                             DEFAULT_INPUT_ACTIVITY );
 297             goto check_input;
 298         }
 299         /* This input is dying, let it do */
 300         else if( p_playlist->p_input->b_die )
 301         {
 302             PL_DEBUG( "dying input" );
 303             PL_UNLOCK;
 304             msleep( INTF_IDLE_SLEEP );
 305             PL_LOCK;
 306             goto check_input;
 307         }
 308         /* This input has finished, ask it to die ! */
 309         else if( p_playlist->p_input->b_error
 310                   || p_playlist->p_input->b_eof )
 311         {
 312             PL_DEBUG( "finished input" );
 313             input_StopThread( p_playlist->p_input );
 314             /* No need to wait here, we'll wait in the p_input->b_die case */
 315             goto check_input;
 316         }
 317         else if( p_playlist->p_input->i_state != INIT_S )
 318         {
 319             PL_UNLOCK;
 320             ObjectGarbageCollector( p_playlist, false );
 321             PL_LOCK;
 322         }
 323     }
 324     else
 325     {
 326         /* No input. Several cases
 327          *  - No request, running status -> start new item
 328          *  - No request, stopped status -> collect garbage
 329          *  - Request, running requested -> start new item
 330          *  - Request, stopped requested -> collect garbage
 331         */
 332         int i_status = p_playlist->request.b_request ?
 333             p_playlist->request.i_status : p_playlist->status.i_status;
 334         if( i_status != PLAYLIST_STOPPED )
 335         {
 336             msg_Dbg( p_playlist, "starting new item" );
 337             p_item = playlist_NextItem( p_playlist );
 338
 339             if( p_item == NULL )
 340             {
 341                 msg_Dbg( p_playlist, "nothing to play" );
 342                 p_playlist->status.i_status = PLAYLIST_STOPPED;
 343                 PL_UNLOCK;
 344
 345                 if( b_playexit == true )
 346                 {
 347                     msg_Info( p_playlist, "end of playlist, exiting" );
 348                     vlc_object_kill( p_playlist->p_libvlc );
 349                 }
 350                 ObjectGarbageCollector( p_playlist, true );
 351                 return;
 352              }
 353              playlist_PlayItem( p_playlist, p_item );
 354          }
 355          else
 356          {
 357             const bool b_gc_forced = p_playlist->status.i_status != PLAYLIST_STOPPED;
 358
 359             p_playlist->status.i_status = PLAYLIST_STOPPED;
 360             if( p_playlist->status.p_item &&
 361                 p_playlist->status.p_item->i_flags & PLAYLIST_REMOVE_FLAG )
 362             {
 363                 PL_DEBUG( "deleting item marked for deletion" );
 364                 playlist_ItemDelete( p_playlist->status.p_item );
 365                 p_playlist->status.p_item = NULL;
 366             }
 367
 368             /* Collect garbage */
 369             PL_UNLOCK;
 370             ObjectGarbageCollector( p_playlist, b_gc_forced );
 371             PL_LOCK;
 372         }
 373     }
 374     PL_UNLOCK;
 375 }
 376
 377 /**
 378  * Last loop
 379  *
 380  * The playlist is dying so do the last loop
 381  * \param p_playlist the playlist object
 382  * \return nothing
 383 */
 384 void playlist_LastLoop( playlist_t *p_playlist )
 385 {
 386     vlc_object_t *p_obj;
 387
 388     /* If there is an input, kill it */
 389     while( 1 )
 390     {
 391         PL_LOCK;
 392         if( p_playlist->p_input == NULL )
 393         {
 394             PL_UNLOCK;
 395             break;
 396         }
 397
 398         if( p_playlist->p_input->b_dead )
 399         {
 400             input_thread_t *p_input;
 401
 402             /* Unlink current input */
 403             p_input = p_playlist->p_input;
 404             p_playlist->p_input = NULL;
 405             PL_UNLOCK;
 406
 407             /* Destroy input */
 408             vlc_object_release( p_input );
 409             continue;
 410         }
 411         else if( p_playlist->p_input->b_die )
 412         {
 413             /* This input is dying, leave it alone */
 414             ;
 415         }
 416         else if( p_playlist->p_input->b_error || p_playlist->p_input->b_eof )
 417         {
 418             input_StopThread( p_playlist->p_input );
 419             PL_UNLOCK;
 420             continue;
 421         }
 422         else
 423         {
 424             p_playlist->p_input->b_eof = 1;
 425         }
 426         PL_UNLOCK;
 427
 428         msleep( INTF_IDLE_SLEEP );
 429     }
 430
 431 #ifdef ENABLE_SOUT
 432     /* close all remaining sout */
 433     while( ( p_obj = vlc_object_find( p_playlist,
 434                                       VLC_OBJECT_SOUT, FIND_CHILD ) ) )
 435     {
 436         vlc_object_detach( p_obj );
 437         vlc_object_release( p_obj );
 438         sout_DeleteInstance( (sout_instance_t*)p_obj );
 439     }
 440 #endif
 441
 442     /* close all remaining vout */
 443     while( ( p_obj = vlc_object_find( p_playlist,
 444                                       VLC_OBJECT_VOUT, FIND_CHILD ) ) )
 445     {
 446         vlc_object_detach( p_obj );
 447         vlc_object_release( p_obj );
 448         vout_Destroy( (vout_thread_t *)p_obj );
 449     }
 450
 451     while( p_playlist->i_sds )
 452     {
 453         playlist_ServicesDiscoveryRemove( p_playlist,
 454                                           p_playlist->pp_sds[0]->p_sd->psz_module );
 455     }
 456
 457     playlist_MLDump( p_playlist );
 458
 459     PL_LOCK;
 460     FOREACH_ARRAY( playlist_item_t *p_del, p_playlist->all_items )
 461         free( p_del->pp_children );
 462         vlc_gc_decref( p_del->p_input );
 463         free( p_del );
 464     FOREACH_END();
 465     ARRAY_RESET( p_playlist->all_items );
 466
 467     ARRAY_RESET( p_playlist->items );
 468     ARRAY_RESET( p_playlist->current );
 469
 470     PL_UNLOCK;
 471 }
 472
 473 /**
 474  * Preparse loop
 475  *
 476  * Main loop for preparser queue
 477  * \param p_obj items to preparse
 478  * \return nothing
 479  */
 480 void playlist_PreparseLoop( playlist_preparse_t *p_obj )
 481 {
 482     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 483     input_item_t *p_current;
 484     int i_activity;
 485
 486     while( !p_playlist->b_die )
 487     {
 488         vlc_object_lock( p_obj );
 489         while( p_obj->i_waiting == 0 )
 490         {
 491             if( vlc_object_wait( p_obj ) || p_playlist->b_die )
 492             {
 493                 vlc_object_unlock( p_obj );
 494                 return;
 495             }
 496         }
 497
 498         p_current = p_obj->pp_waiting[0];
 499         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 500         vlc_object_unlock( p_obj );
 501
 502         PL_LOCK;
 503         if( p_current )
 504         {
 505             if( p_current->i_type == ITEM_TYPE_FILE )
 506             {
 507                 stats_TimerStart( p_playlist, "Preparse run",
 508                                   STATS_TIMER_PREPARSE );
 509                 /* Do not preparse if it is already done (like by playing it) */
 510                 if( !input_item_IsPreparsed( p_current ) )
 511                 {
 512                     PL_UNLOCK;
 513                     input_Preparse( p_playlist, p_current );
 514                     PL_LOCK;
 515                 }
 516                 stats_TimerStop( p_playlist, STATS_TIMER_PREPARSE );
 517                 PL_UNLOCK;
 518                 input_item_SetPreparsed( p_current, true );
 519                 var_SetInteger( p_playlist, "item-change", p_current->i_id );
 520                 PL_LOCK;
 521             }
 522             /* If we haven't retrieved enough meta, add to secondary queue
 523              * which will run the "meta fetchers".
 524              * This only checks for meta, not for art
 525              * \todo don't do this for things we won't get meta for, like vids
 526              */
 527             char *psz_arturl = input_item_GetArtURL( p_current );
 528             char *psz_name = input_item_GetName( p_current );
 529             if( p_playlist->p_fetcher->i_art_policy == ALBUM_ART_ALL &&
 530                         ( !psz_arturl || strncmp( psz_arturl, "file://", 7 ) ) )
 531             {
 532                 PL_DEBUG("meta ok for %s, need to fetch art", psz_name );
 533                 vlc_object_lock( p_playlist->p_fetcher );
 534                 INSERT_ELEM( p_playlist->p_fetcher->pp_waiting,
 535                              p_playlist->p_fetcher->i_waiting,
 536                              p_playlist->p_fetcher->i_waiting, p_current);
 537                 vlc_object_signal_unlocked( p_playlist->p_fetcher );
 538                 vlc_object_unlock( p_playlist->p_fetcher );
 539             }
 540             else
 541             {
 542                 PL_DEBUG( "no fetch required for %s (art currently %s)",
 543                           psz_name, psz_arturl );
 544                 vlc_gc_decref( p_current );
 545             }
 546             free( psz_name );
 547             free( psz_arturl );
 548             PL_UNLOCK;
 549         }
 550         else
 551             PL_UNLOCK;
 552
 553         vlc_object_lock( p_obj );
 554         i_activity = var_GetInteger( p_playlist, "activity" );
 555         if( i_activity < 0 ) i_activity = 0;
 556         vlc_object_unlock( p_obj );
 557         /* Sleep at least 1ms */
 558         msleep( (i_activity+1) * 1000 );
 559     }
 560 }
 561
 562 /**
 563  * Fetcher loop
 564  *
 565  * Main loop for secondary preparser queue
 566  * \param p_obj items to preparse
 567  * \return nothing
 568  */
 569 void playlist_FetcherLoop( playlist_fetcher_t *p_obj )
 570 {
 571     playlist_t *p_playlist = (playlist_t *)p_obj->p_parent;
 572     input_item_t *p_item;
 573     int i_activity;
 574
 575     while( !p_playlist->b_die )
 576     {
 577         vlc_mutex_lock( &p_obj->object_lock );
 578         while( p_obj->i_waiting == 0 )
 579         {
 580             vlc_cond_wait( &p_obj->object_wait, &p_obj->object_lock );
 581             if( p_playlist->b_die )
 582             {
 583                 vlc_mutex_unlock( &p_obj->object_lock );
 584                 return;
 585             }
 586         }
 587
 588         p_item = p_obj->pp_waiting[0];
 589         REMOVE_ELEM( p_obj->pp_waiting, p_obj->i_waiting, 0 );
 590         vlc_mutex_unlock( &p_obj->object_lock );
 591         if( p_item )
 592         {
 593             int i_ret;
 594
 595             /* Check if it is not yet preparsed and if so wait for it (at most 0.5s)
 596              * (This can happen if we fetch art on play)
 597              * FIXME this doesn't work if we need to fetch meta before art ... */
 598             for( i_ret = 0; i_ret < 10 && !input_item_IsPreparsed( p_item ); i_ret++ )
 599             {
 600                 bool b_break;
 601                 PL_LOCK;
 602                 b_break = ( !p_playlist->p_input || input_GetItem(p_playlist->p_input) != p_item  ||
 603                             p_playlist->p_input->b_die || p_playlist->p_input->b_eof || p_playlist->p_input->b_error );
 604                 PL_UNLOCK;
 605                 if( b_break )
 606                     break;
 607                 msleep( 50000 );
 608             }
 609
 610             i_ret = input_ArtFind( p_playlist, p_item );
 611             if( i_ret == 1 )
 612             {
 613                 PL_DEBUG( "downloading art for %s", p_item->psz_name );
 614                 if( input_DownloadAndCacheArt( p_playlist, p_item ) )
 615                     input_item_SetArtNotFound( p_item, true );
 616                 else {
 617                     input_item_SetArtFetched( p_item, true );
 618                     var_SetInteger( p_playlist, "item-change",
 619                                     p_item->i_id );
 620                 }
 621             }
 622             else if( i_ret == 0 ) /* Was in cache */
 623             {
 624                 PL_DEBUG( "found art for %s in cache", p_item->psz_name );
 625                 input_item_SetArtFetched( p_item, true );
 626                 var_SetInteger( p_playlist, "item-change", p_item->i_id );
 627             }
 628             else
 629             {
 630                 PL_DEBUG( "art not found for %s", p_item->psz_name );
 631                 input_item_SetArtNotFound( p_item, true );
 632             }
 633             vlc_gc_decref( p_item );
 634         }
 635         vlc_object_lock( p_obj );
 636         i_activity = var_GetInteger( p_playlist, "activity" );
 637         if( i_activity < 0 ) i_activity = 0;
 638         vlc_object_unlock( p_obj );
 639         /* Sleep at least 1ms */
 640         msleep( (i_activity+1) * 1000 );
 641     }
 642 }
 643
 644 static void VariablesInit( playlist_t *p_playlist )
 645 {
 646     vlc_value_t val;
 647     /* These variables control updates */
 648     var_Create( p_playlist, "intf-change", VLC_VAR_BOOL );
 649     val.b_bool = true;
 650     var_Set( p_playlist, "intf-change", val );
 651
 652     var_Create( p_playlist, "item-change", VLC_VAR_INTEGER );
 653     val.i_int = -1;
 654     var_Set( p_playlist, "item-change", val );
 655
 656     var_Create( p_playlist, "item-deleted", VLC_VAR_INTEGER );
 657     val.i_int = -1;
 658     var_Set( p_playlist, "item-deleted", val );
 659
 660     var_Create( p_playlist, "item-append", VLC_VAR_ADDRESS );
 661
 662     var_Create( p_playlist, "playlist-current", VLC_VAR_INTEGER );
 663     val.i_int = -1;
 664     var_Set( p_playlist, "playlist-current", val );
 665
 666     var_Create( p_playlist, "intf-popupmenu", VLC_VAR_BOOL );
 667
 668     var_Create( p_playlist, "intf-show", VLC_VAR_BOOL );
 669     val.b_bool = true;
 670     var_Set( p_playlist, "intf-show", val );
 671
 672     var_Create( p_playlist, "activity", VLC_VAR_INTEGER );
 673     var_SetInteger( p_playlist, "activity", 0 );
 674
 675     /* Variables to control playback */
 676     var_CreateGetBool( p_playlist, "play-and-stop" );
 677     var_CreateGetBool( p_playlist, "play-and-exit" );
 678     var_CreateGetBool( p_playlist, "random" );
 679     var_CreateGetBool( p_playlist, "repeat" );
 680     var_CreateGetBool( p_playlist, "loop" );
 681
 682     var_AddCallback( p_playlist, "random", RandomCallback, NULL );
 683 }