preparser: start and wait for input thread explicitly

src/input/var.c

@@ -212,11 +212,8 @@ void input_ControlVarInit ( input_thread_t *p_input )
     var_Create( p_input, "bit-rate", VLC_VAR_INTEGER );
     var_Create( p_input, "sample-rate", VLC_VAR_INTEGER );
 
-    if( !p_input->b_preparsing )
-    {
-        /* Special "intf-event" variable. */
-        var_Create( p_input, "intf-event", VLC_VAR_INTEGER );
-    }
+    /* Special "intf-event" variable. */
+    var_Create( p_input, "intf-event", VLC_VAR_INTEGER );
 
     /* Add all callbacks
      * XXX we put callback only in non preparsing mode. We need to create the variable

src/playlist/preparser.c

@@ -139,10 +139,24 @@ void playlist_preparser_Delete( playlist_preparser_t *p_preparser )
 /*****************************************************************************
  * Privates functions
  *****************************************************************************/
+
+static int InputEvent( vlc_object_t *obj, const char *varname,
+                       vlc_value_t old, vlc_value_t cur, void *data )
+{
+    vlc_sem_t *done = data;
+    int event = cur.i_int;
+
+    if( event == INPUT_EVENT_DEAD )
+        vlc_sem_post( done );
+
+    (void) obj; (void) varname; (void) old;
+    return VLC_SUCCESS;
+}
+
 /**
  * This function preparses an item when needed.
  */
-static void Preparse( vlc_object_t *obj, input_item_t *p_item,
+static void Preparse( playlist_preparser_t *preparser, input_item_t *p_item,
                       input_item_meta_request_option_t i_options )
 {
     vlc_mutex_lock( &p_item->lock );
@@ -160,21 +174,31 @@ static void Preparse( vlc_object_t *obj, input_item_t *p_item,
             b_preparse = true;
         break;
     }
-    if( !b_preparse )
-    {
-        input_item_SetPreparsed( p_item, true );
-        input_item_SignalPreparseEnded( p_item );
-        return;
-    }
 
     /* Do not preparse if it is already done (like by playing it) */
-    if( !input_item_IsPreparsed( p_item ) )
+    if( b_preparse && !input_item_IsPreparsed( p_item ) )
     {
-        input_Preparse( obj, p_item );
-        input_item_SetPreparsed( p_item, true );
+        input_thread_t *input = input_CreatePreparser( preparser->object,
+                                                       p_item );
+        if( input == NULL )
+            return;
+
+        vlc_sem_t done;
+
+        vlc_sem_init( &done, 0 );
+        var_AddCallback( input, "intf-event", InputEvent, &done );
+
+        if( input_Start( input ) == VLC_SUCCESS )
+            vlc_sem_wait( &done );
 
-        var_SetAddress( obj, "item-change", p_item );
+        var_DelCallback( input, "intf-event", InputEvent, &done );
+        vlc_sem_destroy( &done );
+        input_Close( input );
+
+        var_SetAddress( preparser->object, "item-change", p_item );
     }
+
+    input_item_SetPreparsed( p_item, true );
     input_item_SignalPreparseEnded( p_item );
 }
 
@@ -225,7 +249,6 @@ static void Art( playlist_preparser_t *p_preparser, input_item_t *p_item )
 static void *Thread( void *data )
 {
     playlist_preparser_t *p_preparser = data;
-    vlc_object_t *obj = p_preparser->object;
 
     for( ;; )
     {
@@ -253,7 +276,7 @@ static void *Thread( void *data )
         if( !p_current )
             break;
 
-        Preparse( obj, p_current, i_options );
+        Preparse( p_preparser, p_current, i_options );
 
         Art( p_preparser, p_current );
         vlc_gc_decref(p_current);