+2008-02-29 Tim-Philipp Müller <tim at centricular dot net>
+
+ * gst/gstinterface.c: (gst_element_implements_interface):
+ Don't crash if the element supports the interface queried, but does
+ not implement GstImplementsInterface. Fixes #519584.
+
+ * tests/check/Makefile.am:
+ * tests/check/gst/.cvsignore:
+ * tests/check/gst/gstinterface.c:
+ Add unit test for the above.
+
2008-02-29 Wim Taymans <wim.taymans@collabora.co.uk>
* libs/gst/base/gstbasesink.c: (gst_base_sink_class_init):
gboolean
gst_element_implements_interface (GstElement * element, GType iface_type)
{
+ g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
+
if (G_TYPE_CHECK_INSTANCE_TYPE (G_OBJECT (element), iface_type)) {
GstImplementsInterface *iface;
GstImplementsInterfaceClass *ifclass;
iface_type, GstImplementsInterface);
ifclass = GST_IMPLEMENTS_INTERFACE_GET_CLASS (iface);
+ /* element implements iface_type but not GstImplementsInterface, so
+ * just assume the other interface is implemented unconditionally */
+ if (ifclass == NULL)
+ return TRUE;
+
if (ifclass->supported != NULL &&
ifclass->supported (iface, iface_type) == TRUE) {
return TRUE;
--- /dev/null
+/* GStreamer GstImplementsInterface check
+ * Copyright (C) 2008 Tim-Philipp Müller <tim centricular net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+
+#include <gst/check/gstcheck.h>
+
+GST_START_TEST (test_without_implements_interface)
+{
+ GstElement *element;
+
+ /* we shouldn't crash if someone tries to use
+ * gst_element_implements_interface() on an element which doesn't implement
+ * the GstImplementsInterface (neither if the element does implement the
+ * requested interface, nor if it doesn't) */
+ element = gst_element_factory_make ("filesrc", "filesrc");
+ fail_unless (element != NULL, "Could not create filesrc element");
+
+ /* does not implement GstImplementsInterface, but does implement the
+ * GstUriHandler interface, so should just return TRUE */
+ fail_if (!gst_element_implements_interface (element, GST_TYPE_URI_HANDLER));
+ fail_if (gst_element_implements_interface (element,
+ GST_TYPE_IMPLEMENTS_INTERFACE));
+ gst_object_unref (element);
+
+ element = gst_element_factory_make ("identity", "identity");
+ fail_unless (element != NULL, "Could not create identity element");
+ fail_if (gst_element_implements_interface (element, GST_TYPE_URI_HANDLER));
+ fail_if (gst_element_implements_interface (element,
+ GST_TYPE_IMPLEMENTS_INTERFACE));
+ gst_object_unref (element);
+}
+
+GST_END_TEST;
+
+static Suite *
+gst_interface_suite (void)
+{
+ Suite *s = suite_create ("GstImplementsInterface");
+ TCase *tc_chain = tcase_create ("correctness");
+
+ suite_add_tcase (s, tc_chain);
+ tcase_add_test (tc_chain, test_without_implements_interface);
+ return s;
+}
+
+GST_CHECK_MAIN (gst_interface);