vlc core: single storage playlist

- Playlist items are stored only once. No category / onelevel separation
- Services Discovery nodes always stay a tree
- The playlist and Media Library are tree or flat depending on variable "playlist-tree".
  It means that if the setting variable says flat, the items that come from playlist
  demuxers are flattened into a single level list.
- The design demanded a different playlist demuxing system. Now playlist demuxers should
  construct a tree of items under an input_item_node_t root and send that using
  input_item_AddSubItemTree. Currently, the old scheme will be retained in modules, because
  there is still some listening to the old event in code (the libvlc media system for example)

include/vlc_common.h

@@ -212,6 +212,7 @@ typedef struct config_category_t config_category_t;
 typedef struct input_thread_t input_thread_t;
 typedef struct input_thread_sys_t input_thread_sys_t;
 typedef struct input_item_t input_item_t;
+typedef struct input_item_node_t input_item_node_t;
 typedef struct access_t access_t;
 typedef struct access_sys_t access_sys_t;
 typedef struct stream_t     stream_t;

include/vlc_events.h

@@ -119,6 +119,7 @@ typedef enum vlc_event_type_t {
     /* Input item events */
     vlc_InputItemMetaChanged,
     vlc_InputItemSubItemAdded,
+    vlc_InputItemSubItemTreeAdded,
     vlc_InputItemDurationChanged,
     vlc_InputItemPreparsedChanged,
     vlc_InputItemNameChanged,
@@ -158,6 +159,10 @@ typedef struct vlc_event_t
         {
             input_item_t * p_new_child;
         } input_item_subitem_added;
+        struct vlc_input_item_subitem_tree_added
+        {
+            input_item_node_t * p_root;
+        } input_item_subitem_tree_added;
         struct vlc_input_item_duration_changed
         {
             mtime_t new_duration;

include/vlc_input_item.h

@@ -107,6 +107,14 @@ enum input_item_type_e
     ITEM_TYPE_NUMBER
 };
 
+struct input_item_node_t
+{
+    input_item_t *         p_item;
+    int                    i_children;
+    input_item_node_t      **pp_children;
+    input_item_node_t      *p_parent;
+};
+
 VLC_EXPORT( void, input_item_CopyOptions, ( input_item_t *p_parent, input_item_t *p_child ) );
 VLC_EXPORT( void, input_item_SetName, ( input_item_t *p_item, const char *psz_name ) );
 
@@ -116,6 +124,11 @@ VLC_EXPORT( void, input_item_SetName, ( input_item_t *p_item, const char *psz_na
  * the input item children. */
 VLC_EXPORT( void, input_item_AddSubItem, ( input_item_t *p_parent, input_item_t *p_child ) );
 
+VLC_EXPORT( void, input_item_AddSubItemTree, ( input_item_node_t *p_root ) );
+
+/* Will send vlc_InputItemSubItemTreeAdded event, just as input_item_AddSubItemTree */
+VLC_EXPORT( void, input_item_AddSubItem2, ( input_item_t *p_parent, input_item_t *p_child ) );
+
 
 /**
  * Option flags
@@ -215,6 +228,14 @@ VLC_EXPORT( input_item_t *, __input_item_NewExt, (vlc_object_t *, const char *ps
  */
 #define input_item_New( a,b,c ) input_item_NewExt( a, b, c, 0, NULL, 0, -1 )
 
+VLC_EXPORT( input_item_node_t *, input_item_node_Create, ( input_item_t *p_input ) );
+
+VLC_EXPORT( void, input_item_node_Delete, ( input_item_node_t *p_node ) );
+
+VLC_EXPORT( input_item_node_t *, input_item_node_AppendItem, ( input_item_node_t *p_node, input_item_t *p_item ) );
+
+VLC_EXPORT( void, input_item_node_AppendNode, ( input_item_node_t *p_node, input_item_node_t *p_item ) );
+
 /******************
  * Input stats
  ******************/

include/vlc_playlist.h

@@ -153,7 +153,6 @@ struct playlist_item_t
     int                    i_id;        /**< Playlist item specific id */
     uint8_t                i_flags;     /**< Flags */
     playlist_t            *p_playlist;  /**< Parent playlist */
-    bool                   b_input_item_observer;
 };
 
 #define PLAYLIST_SAVE_FLAG      0x0001    /**< Must it be saved */
@@ -180,6 +179,11 @@ struct playlist_t
     int                   i_current_index; /**< Index in current array */
 
     /* Predefined items */
+    playlist_item_t *     p_root;
+    playlist_item_t *     p_playing;
+    playlist_item_t *     p_media_library;
+
+    //Phony ones, point to those above;
     playlist_item_t *     p_root_category; /**< Root of category tree */
     playlist_item_t *     p_root_onelevel; /**< Root of onelevel tree */
     playlist_item_t *     p_local_category; /** < "Playlist" in CATEGORY view */
@@ -346,7 +350,6 @@ VLC_EXPORT( int,  playlist_DeleteFromInput, ( playlist_t *, input_item_t *, bool
 VLC_EXPORT( int,  playlist_Add,    ( playlist_t *, const char *, const char *, int, int, bool, bool ) );
 VLC_EXPORT( int,  playlist_AddExt, ( playlist_t *, const char *, const char *, int, int, mtime_t, int, const char *const *, unsigned, bool, bool ) );
 VLC_EXPORT( int, playlist_AddInput, ( playlist_t *, input_item_t *, int, int, bool, bool ) );
-VLC_EXPORT( int, playlist_BothAddInput, ( playlist_t *, input_item_t *,playlist_item_t *,int , int, int*, int*, bool ) );
 
 /********************************** Item search *************************/
 VLC_EXPORT( playlist_item_t *, playlist_ItemGetById, (playlist_t *, int ) );

src/input/item.c

@@ -60,6 +60,7 @@ static inline void input_item_Init( vlc_object_t *p_o, input_item_t *p_i )
     vlc_event_manager_init( p_em, p_i, p_o );
     vlc_event_manager_register_event_type( p_em, vlc_InputItemMetaChanged );
     vlc_event_manager_register_event_type( p_em, vlc_InputItemSubItemAdded );
+    vlc_event_manager_register_event_type( p_em, vlc_InputItemSubItemTreeAdded );
     vlc_event_manager_register_event_type( p_em, vlc_InputItemDurationChanged );
     vlc_event_manager_register_event_type( p_em, vlc_InputItemPreparsedChanged );
     vlc_event_manager_register_event_type( p_em, vlc_InputItemNameChanged );
@@ -268,6 +269,22 @@ void input_item_AddSubItem( input_item_t *p_parent, input_item_t *p_child )
     vlc_event_send( &p_parent->event_manager, &event );
 }
 
+void input_item_AddSubItemTree ( input_item_node_t *p_root )
+{
+    vlc_event_t event;
+    event.type = vlc_InputItemSubItemTreeAdded;
+    event.u.input_item_subitem_tree_added.p_root = p_root;
+    vlc_event_send( &p_root->p_item->event_manager, &event );
+}
+
+void input_item_AddSubItem2 ( input_item_t *p_parent, input_item_t *p_child )
+{
+    input_item_node_t *p_node = input_item_node_Create( p_parent );
+    input_item_node_AppendItem( p_node, p_child );
+    input_item_AddSubItemTree( p_node );
+    input_item_node_Delete( p_node );
+}
+
 bool input_item_HasErrorWhenReading( input_item_t *p_item )
 {
     vlc_mutex_lock( &p_item->lock );
@@ -962,3 +979,61 @@ static int GuessType( const input_item_t *p_item )
                  sizeof( tab[0] ), typecmp );
     return e ? e->i_type : ITEM_TYPE_FILE;
 }
+
+input_item_node_t *input_item_node_Create( input_item_t *p_input )
+{
+    input_item_node_t* p_node = malloc( sizeof( input_item_node_t ) );
+    if( !p_node )
+        return NULL;
+
+    assert( p_input );
+
+    p_node->p_item = p_input;
+    vlc_gc_incref( p_input );
+
+    p_node->p_parent = NULL;
+    p_node->i_children = 0;
+    p_node->pp_children = NULL;
+
+    return p_node;
+}
+
+void input_item_node_Delete( input_item_node_t *p_node )
+{
+  int i;
+  for( i = 0; i < p_node->i_children; i++ )
+      input_item_node_Delete( p_node->pp_children[i] );
+
+  if(  p_node->p_parent )
+  {
+      for( i = 0; i < p_node->p_parent->i_children; i++ )
+          if( p_node->p_parent->pp_children[i] == p_node )
+          {
+              REMOVE_ELEM( p_node->p_parent->pp_children,
+                           p_node->p_parent->i_children,
+                           i );
+              break;
+          }
+  }
+
+  vlc_gc_decref( p_node->p_item );
+  free( p_node );
+}
+
+input_item_node_t *input_item_node_AppendItem( input_item_node_t *p_node, input_item_t *p_item )
+{
+    input_item_node_t *p_new_child = input_item_node_Create( p_item );
+    if( !p_new_child ) return NULL;
+    input_item_node_AppendNode( p_node, p_new_child );
+    return p_new_child;
+}
+
+void input_item_node_AppendNode( input_item_node_t *p_parent, input_item_node_t *p_child )
+{
+    assert( p_parent && p_child && p_child->p_parent == NULL );
+    INSERT_ELEM( p_parent->pp_children,
+                 p_parent->i_children,
+                 p_parent->i_children,
+                 p_child );
+    p_child->p_parent = p_parent;
+}

src/libvlccore.sym

@@ -189,6 +189,8 @@ input_GetItem
 input_item_AddInfo
 input_item_AddOption
 input_item_AddSubItem
+input_item_AddSubItem2
+input_item_AddSubItemTree
 input_item_CopyOptions
 input_item_DelInfo
 input_item_GetDuration
@@ -203,6 +205,10 @@ input_item_IsPreparsed
 input_item_MetaMatch
 __input_item_NewExt
 input_item_NewWithType
+input_item_node_AppendItem
+input_item_node_AppendNode
+input_item_node_Create
+input_item_node_Delete
 input_item_SetDuration
 input_item_SetMeta
 input_item_SetName
@@ -313,7 +319,6 @@ playlist_AddExt
 playlist_AddInput
 playlist_AskForArtEnqueue
 playlist_AssertLocked
-playlist_BothAddInput
 playlist_ChildSearchName
 playlist_Clear
 playlist_Control

src/playlist/engine.c

@@ -105,54 +105,50 @@ playlist_t * playlist_Create( vlc_object_t *p_parent )
     pl_priv(p_playlist)->b_auto_preparse =
         var_InheritBool( p_parent, "auto-preparse" );
 
-    PL_LOCK; /* playlist_NodeCreate will check for it */
-    p_playlist->p_root_category = playlist_NodeCreate( p_playlist, NULL, NULL,
+    /* Create the root node */
+    PL_LOCK;
+    p_playlist->p_root = playlist_NodeCreate( p_playlist, NULL, NULL,
                                     0, NULL );
-    p_playlist->p_root_onelevel = playlist_NodeCreate( p_playlist, NULL, NULL,
-                                    0, p_playlist->p_root_category->p_input );
     PL_UNLOCK;
+    if( !p_playlist->p_root ) return NULL;
 
-    if( !p_playlist->p_root_category || !p_playlist->p_root_onelevel )
-        return NULL;
+    /* Create currently playing items node */
+    PL_LOCK;
+    p_playlist->p_playing = playlist_NodeCreate(
+        p_playlist, _( "Playlist" ), p_playlist->p_root,
+        PLAYLIST_RO_FLAG, NULL );
 
-    /* Create playlist and media library */
-    PL_LOCK; /* playlist_NodesPairCreate will check for it */
-    playlist_NodesPairCreate( p_playlist, _( "Playlist" ),
-                            &p_playlist->p_local_category,
-                            &p_playlist->p_local_onelevel, false );
     PL_UNLOCK;
 
-    p_playlist->p_local_category->i_flags |= PLAYLIST_RO_FLAG;
-    p_playlist->p_local_onelevel->i_flags |= PLAYLIST_RO_FLAG;
-
-    if( !p_playlist->p_local_category || !p_playlist->p_local_onelevel ||
-        !p_playlist->p_local_category->p_input ||
-        !p_playlist->p_local_onelevel->p_input )
-        return NULL;
+    if( !p_playlist->p_playing ) return NULL;
 
+    /* Create media library node */
     const bool b_ml = var_InheritBool( p_parent, "media-library");
     if( b_ml )
     {
-        PL_LOCK; /* playlist_NodesPairCreate will check for it */
-        playlist_NodesPairCreate( p_playlist, _( "Media Library" ),
-                            &p_playlist->p_ml_category,
-                            &p_playlist->p_ml_onelevel, false );
+        PL_LOCK;
+        p_playlist->p_media_library = playlist_NodeCreate(
+            p_playlist, _( "Media Library" ), p_playlist->p_root,
+            PLAYLIST_RO_FLAG, NULL );
         PL_UNLOCK;
 
-        if(!p_playlist->p_ml_category || !p_playlist->p_ml_onelevel)
-            return NULL;
-
-        p_playlist->p_ml_category->i_flags |= PLAYLIST_RO_FLAG;
-        p_playlist->p_ml_onelevel->i_flags |= PLAYLIST_RO_FLAG;
+        if(!p_playlist->p_media_library ) return NULL;
     }
     else
     {
-        p_playlist->p_ml_category = p_playlist->p_ml_onelevel = NULL;
+        p_playlist->p_media_library = NULL;
     }
 
+    p_playlist->p_root_category = p_playlist->p_root;
+    p_playlist->p_root_onelevel = p_playlist->p_root;
+    p_playlist->p_local_category = p_playlist->p_playing;
+    p_playlist->p_local_onelevel = p_playlist->p_playing;
+    p_playlist->p_ml_category = p_playlist->p_media_library;
+    p_playlist->p_ml_onelevel = p_playlist->p_media_library;;
+
     /* Initial status */
     pl_priv(p_playlist)->status.p_item = NULL;
-    pl_priv(p_playlist)->status.p_node = p_playlist->p_local_onelevel;
+    pl_priv(p_playlist)->status.p_node = p_playlist->p_playing;
     pl_priv(p_playlist)->request.b_request = false;
     pl_priv(p_playlist)->status.i_status = PLAYLIST_STOPPED;
 

src/playlist/loadsave.c

@@ -103,16 +103,17 @@ int playlist_Import( playlist_t *p_playlist, const char *psz_file )
 /*****************************************************************************
  * A subitem has been added to the Media Library (Event Callback)
  *****************************************************************************/
-static void input_item_subitem_added( const vlc_event_t * p_event,
+static void input_item_subitem_tree_added( const vlc_event_t * p_event,
                                       void * user_data )
 {
     playlist_t *p_playlist = user_data;
-    input_item_t *p_item = p_event->u.input_item_subitem_added.p_new_child;
+    input_item_node_t *p_root =
+        p_event->u.input_item_subitem_tree_added.p_root;
 
-    /* playlist_AddInput() can fail, but we have no way to report that ..
-     * Any way when it has failed, either the playlist is dying, either OOM */
-    playlist_AddInput( p_playlist, p_item, PLAYLIST_APPEND, PLAYLIST_END,
-            false, pl_Unlocked );
+    PL_LOCK;
+    playlist_InsertInputItemTree ( p_playlist, p_playlist->p_media_library,
+                                   p_root, 0, !pl_priv(p_playlist)->b_tree );
+    PL_UNLOCK;
 }
 
 int playlist_MLLoad( playlist_t *p_playlist )
@@ -156,7 +157,7 @@ int playlist_MLLoad( playlist_t *p_playlist )
         return VLC_ENOMEM;
 
     const char *const options[1] = { "meta-file", };
-    /* that option has to be cleaned in input_item_subitem_added() */
+    /* that option has to be cleaned in input_item_subitem_tree_added() */
     /* vlc_gc_decref() in the same function */
     p_input = input_item_NewExt( p_playlist, psz_uri, _("Media Library"),
                                  1, options, VLC_INPUT_OPTION_TRUSTED, -1 );
@@ -165,19 +166,13 @@ int playlist_MLLoad( playlist_t *p_playlist )
         return VLC_EGENERIC;
 
     PL_LOCK;
-    if( p_playlist->p_ml_onelevel->p_input )
-        vlc_gc_decref( p_playlist->p_ml_onelevel->p_input );
-    if( p_playlist->p_ml_category->p_input )
-        vlc_gc_decref( p_playlist->p_ml_category->p_input );
+    if( p_playlist->p_media_library->p_input )
+        vlc_gc_decref( p_playlist->p_media_library->p_input );
 
-    p_playlist->p_ml_onelevel->p_input =
-    p_playlist->p_ml_category->p_input = p_input;
-    /* We save the input at two different place, incref */
-    vlc_gc_incref( p_input );
-    vlc_gc_incref( p_input );
+    p_playlist->p_media_library->p_input = p_input;
 
-    vlc_event_attach( &p_input->event_manager, vlc_InputItemSubItemAdded,
-                        input_item_subitem_added, p_playlist );
+    vlc_event_attach( &p_input->event_manager, vlc_InputItemSubItemTreeAdded,
+                        input_item_subitem_tree_added, p_playlist );
 
     pl_priv(p_playlist)->b_doing_ml = true;
     PL_UNLOCK;
@@ -190,10 +185,9 @@ int playlist_MLLoad( playlist_t *p_playlist )
     pl_priv(p_playlist)->b_doing_ml = false;
     PL_UNLOCK;
 
-    vlc_event_detach( &p_input->event_manager, vlc_InputItemSubItemAdded,
-                        input_item_subitem_added, p_playlist );
+    vlc_event_detach( &p_input->event_manager, vlc_InputItemSubItemTreeAdded,
+                        input_item_subitem_tree_added, p_playlist );
 
-    vlc_gc_decref( p_input );
     return VLC_SUCCESS;
 }
 
@@ -220,7 +214,7 @@ int playlist_MLDump( playlist_t *p_playlist )
     strcat( psz_dirname, DIR_SEP "ml.xspf" );
 
     stats_TimerStart( p_playlist, "ML Dump", STATS_TIMER_ML_DUMP );
-    playlist_Export( p_playlist, psz_dirname, p_playlist->p_ml_category,
+    playlist_Export( p_playlist, psz_dirname, p_playlist->p_media_library,
                      "export-xspf" );
     stats_TimerStop( p_playlist, STATS_TIMER_ML_DUMP );
 

src/playlist/playlist_internal.h

@@ -109,8 +109,7 @@ void pl_Deactivate (libvlc_int_t *);
 
 /* */
 playlist_item_t *playlist_ItemNewFromInput( playlist_t *p_playlist,
-                                            input_item_t *p_input,
-                                            bool install_observer );
+                                            input_item_t *p_input );
 
 /* Engine */
 playlist_item_t * get_current_status_item( playlist_t * p_playlist);
@@ -132,6 +131,9 @@ void playlist_SendAddNotify( playlist_t *p_playlist, int i_item_id,
 playlist_item_t * playlist_NodeAddInput( playlist_t *, input_item_t *,
         playlist_item_t *,int , int, bool );
 
+playlist_item_t *playlist_InsertInputItemTree ( playlist_t *,
+        playlist_item_t *, input_item_node_t *, int, bool );
+
 /* Tree walking */
 playlist_item_t *playlist_ItemFindFromInputAndRoot( playlist_t *p_playlist,
                                 input_item_t *p_input, playlist_item_t *p_root,

src/playlist/services_discovery.c

@@ -90,8 +90,7 @@ char **vlc_sd_GetNames (vlc_object_t *obj, char ***pppsz_longnames)
 struct vlc_sd_internal_t
 {
     /* the playlist items for category and onelevel */
-    playlist_item_t      *p_cat;
-    playlist_item_t      *p_one;
+    playlist_item_t      *p_node;
     services_discovery_t *p_sd; /**< Loaded service discovery modules */
     char                 *psz_name;
 };
@@ -244,8 +243,7 @@ static void playlist_sd_item_added( const vlc_event_t * p_event, void * user_dat
 
     PL_LOCK;
     /* If p_parent is in root category (this is clearly a hack) and we have a cat */
-    if( !EMPTY_STR(psz_cat) &&
-        p_parent->p_parent == p_playlist->p_root_category )
+    if( !EMPTY_STR(psz_cat) )
     {
         /* */
         playlist_item_t * p_cat;
@@ -259,9 +257,9 @@ static void playlist_sd_item_added( const vlc_event_t * p_event, void * user_dat
         p_parent = p_cat;
     }
 
-    playlist_BothAddInput( p_playlist, p_input, p_parent,
+    playlist_NodeAddInput( p_playlist, p_input, p_parent,
                            PLAYLIST_APPEND, PLAYLIST_END,
-                                        NULL, NULL, pl_Locked );
+                           pl_Locked );
     PL_UNLOCK;
 }
 
@@ -299,22 +297,21 @@ int playlist_ServicesDiscoveryAdd( playlist_t *p_playlist, const char *psz_modul
         return VLC_ENOMEM;
     }
 
-    playlist_item_t * p_cat;
-    playlist_item_t * p_one;
+    playlist_item_t *p_node;
 
     PL_LOCK;
-    playlist_NodesPairCreate( p_playlist, module_get_name( m, true ),
-                              &p_cat, &p_one, false );
+    p_node = playlist_NodeCreate( p_playlist, module_get_name( m, true ),
+                                  p_playlist->p_root, 0, NULL );
     PL_UNLOCK;
     module_release( m );
 
     vlc_event_attach( services_discovery_EventManager( p_sd ),
                       vlc_ServicesDiscoveryItemAdded,
-                      playlist_sd_item_added, p_cat );
+                      playlist_sd_item_added, p_node );
 
     vlc_event_attach( services_discovery_EventManager( p_sd ),
                       vlc_ServicesDiscoveryItemRemoved,
-                      playlist_sd_item_removed, p_cat );
+                      playlist_sd_item_removed, p_node );
 
     if( !vlc_sd_Start( p_sd, psz_module ) )
     {
@@ -324,10 +321,9 @@ int playlist_ServicesDiscoveryAdd( playlist_t *p_playlist, const char *psz_modul
     }
 
     /* We want tree-view for service directory */
-    p_one->p_input->b_prefers_tree = true;
+    p_node->p_input->b_prefers_tree = true;
     p_sds->p_sd = p_sd;
-    p_sds->p_one = p_one;
-    p_sds->p_cat = p_cat;
+    p_sds->p_node = p_node;
     p_sds->psz_name = strdup( psz_module );
 
     PL_LOCK;
@@ -369,21 +365,16 @@ int playlist_ServicesDiscoveryRemove( playlist_t * p_playlist,
     vlc_event_detach( services_discovery_EventManager( p_sd ),
                         vlc_ServicesDiscoveryItemAdded,
                         playlist_sd_item_added,
-                        p_sds->p_cat );
+                        p_sds->p_node );
 
     vlc_event_detach( services_discovery_EventManager( p_sd ),
                         vlc_ServicesDiscoveryItemRemoved,
                         playlist_sd_item_removed,
-                        p_sds->p_cat );
+                        p_sds->p_node );
 
     /* Remove the sd playlist node if it exists */
     PL_LOCK;
-    if( p_sds->p_cat != p_playlist->p_root_category &&
-        p_sds->p_one != p_playlist->p_root_onelevel )
-    {
-        playlist_NodeDelete( p_playlist, p_sds->p_cat, true, false );
-        playlist_NodeDelete( p_playlist, p_sds->p_one, true, false );
-    }
+    playlist_NodeDelete( p_playlist, p_sds->p_node, true, false );
     PL_UNLOCK;
 
     vlc_sd_Destroy( p_sd );

src/playlist/tree.c

@@ -69,7 +69,7 @@ playlist_item_t * playlist_NodeCreate( playlist_t *p_playlist,
         p_new_input = input_item_NewWithType( VLC_OBJECT(p_playlist), NULL,
                                         psz_name, 0, NULL, 0, -1, ITEM_TYPE_NODE );
     p_item = playlist_ItemNewFromInput( p_playlist,
-                                        p_input ? p_input : p_new_input, p_input == NULL );
+                                        p_input ? p_input : p_new_input );
     if( p_new_input )
         vlc_gc_decref( p_new_input );
 
@@ -266,69 +266,6 @@ playlist_item_t *playlist_ChildSearchName( playlist_item_t *p_node,
     return NULL;
 }
 
-/**
- * Create a pair of nodes in the category and onelevel trees.
- * They share the same input item.
- * \param p_playlist the playlist
- * \param psz_name the name of the nodes
- * \param pp_node_cat pointer to return the node in category tree
- * \param pp_node_one pointer to return the node in onelevel tree
- * \param b_for_sd For Services Discovery ? (make node read-only and unskipping)
- */
-void playlist_NodesPairCreate( playlist_t *p_playlist, const char *psz_name,
-                               playlist_item_t **pp_node_cat,
-                               playlist_item_t **pp_node_one,
-                               bool b_for_sd )
-{
-    PL_ASSERT_LOCKED;
-    *pp_node_cat = playlist_NodeCreate( p_playlist, psz_name,
-                                        p_playlist->p_root_category, 0, NULL );
-    *pp_node_one = playlist_NodeCreate( p_playlist, psz_name,
-                                        p_playlist->p_root_onelevel, 0,
-                                        (*pp_node_cat)->p_input );
-    if( b_for_sd )
-    {
-        (*pp_node_cat)->i_flags |= PLAYLIST_RO_FLAG;
-        (*pp_node_cat)->i_flags |= PLAYLIST_SKIP_FLAG;
-        (*pp_node_one)->i_flags |= PLAYLIST_RO_FLAG;
-        (*pp_node_one)->i_flags |= PLAYLIST_SKIP_FLAG;
-    }
-}
-
-/**
- * Get the node in the preferred tree from a node in one of category
- * or onelevel tree.
- */
-playlist_item_t * playlist_GetPreferredNode( playlist_t *p_playlist,
-                                             playlist_item_t *p_node )
-{
-    PL_ASSERT_LOCKED;
-    int i;
-    if( p_node->p_parent == p_playlist->p_root_category )
-    {
-        if( pl_priv(p_playlist)->b_tree || p_node->p_input->b_prefers_tree )
-            return p_node;
-        for( i = 0 ; i< p_playlist->p_root_onelevel->i_children; i++ )
-        {
-            if( p_playlist->p_root_onelevel->pp_children[i]->p_input ==
-                    p_node->p_input )
-                return p_playlist->p_root_onelevel->pp_children[i];
-        }
-    }
-    else if( p_node->p_parent == p_playlist->p_root_onelevel )
-    {
-        if( !pl_priv(p_playlist)->b_tree || !p_node->p_input->b_prefers_tree )
-            return p_node;
-        for( i = 0 ; i< p_playlist->p_root_category->i_children; i++ )
-        {
-            if( p_playlist->p_root_category->pp_children[i]->p_input ==
-                    p_node->p_input )
-                return p_playlist->p_root_category->pp_children[i];
-        }
-    }
-    return NULL;
-}
-
 /**********************************************************************
  * Tree walking functions
  **********************************************************************/