--- /dev/null
+/*****************************************************************************
+ * libvlc_callback.c: New libvlc callback control API
+ *****************************************************************************
+ * Copyright (C) 2007 the VideoLAN team
+ * $Id $
+ *
+ * Authors: Filippo Carone <filippo@carone.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#include "libvlc_internal.h"
+#include <vlc/libvlc.h>
+
+int libvlc_private_handle_callback( vlc_object_t *p_this, char const *psz_cmd,
+ vlc_value_t oldval, vlc_value_t newval,
+ void *p_data );
+
+void libvlc_callback_register_for_event( libvlc_instance_t *p_instance,
+ libvlc_event_type_t i_event_type,
+ libvlc_callback_t f_callback,
+ void *user_data,
+ libvlc_exception_t *p_e )
+{
+
+ if ( ! &f_callback )
+ RAISEVOID (" Callback function is null ");
+
+ struct libvlc_callback_entry_t *entry = malloc( sizeof( struct libvlc_callback_entry_t ) );
+ entry->f_callback = f_callback;
+ entry->i_event_type = i_event_type;
+ entry->p_user_data = user_data;
+
+ const char *callback_name;
+
+ switch ( i_event_type )
+ {
+ case VOLUME_CHANGED:
+ callback_name = "volume-change";
+ break;
+ case INPUT_POSITION_CHANGED:
+ break;
+ default:
+ free( entry );
+ RAISEVOID( "Unsupported event." );
+ }
+
+ int res = var_AddCallback( p_instance->p_libvlc_int,
+ callback_name,
+ libvlc_private_handle_callback,
+ entry );
+
+ if (res != VLC_SUCCESS)
+ {
+ free ( entry );
+ RAISEVOID("Internal callback registration was not successful. Callback not registered.");
+ }
+
+ add_callback_entry( entry, &p_instance->p_callback_list );
+
+ return;
+}
+
+void libvlc_callback_unregister_for_event( libvlc_instance_t *p_instance,
+ libvlc_event_type_t i_event_type,
+ libvlc_callback_t f_callback,
+ void *p_user_data,
+ libvlc_exception_t *p_e )
+{
+ struct libvlc_callback_entry_list_t *p_listitem = p_instance->p_callback_list;
+
+ while( p_listitem )
+ {
+ if( p_listitem->elmt->f_callback == f_callback
+ && ( p_listitem->elmt->i_event_type == i_event_type )
+ && ( p_listitem->elmt->p_user_data == p_user_data )
+
+ )
+ {
+ if( p_listitem->prev )
+ p_listitem->prev->next = p_listitem->next;
+ else
+ p_instance->p_callback_list = p_listitem->next;
+
+ p_listitem->next->prev = p_listitem->prev;
+ free( p_listitem );
+ break;
+ }
+ p_listitem = p_listitem->next;
+ }
+}
+
+
+int libvlc_private_handle_callback( vlc_object_t *p_this, char const *psz_cmd,
+ vlc_value_t oldval, vlc_value_t newval,
+ void *p_data )
+{
+ struct libvlc_callback_entry_t *entry = p_data;
+ libvlc_event_t event;
+ event.type = entry->i_event_type;
+
+ /* Call the client entry */
+ entry->f_callback( entry->p_instance, &event, entry->p_user_data );
+
+ return VLC_SUCCESS;
+}