GStreamer: added convenience function in QGstUtils.

-> qt_gst_element_get_factory_name(GstElement *elem)

Change-Id: Icf806488b49fbcdecdd605b6316bd1ef8796a883
Reviewed-by: Christian Stromme <christian.stromme@theqtcompany.com>

src/plugins/gstreamer/camerabin/camerabinaudioencoder.cpp

@@ -34,6 +34,7 @@
 #include "camerabinaudioencoder.h"
 #include "camerabincontainer.h"
 #include <private/qgstcodecsinfo_p.h>
+#include <private/qgstutils_p.h>
 
 #include <QtCore/qdebug.h>
 
@@ -120,8 +121,7 @@ GstEncodingProfile *CameraBinAudioEncoder::createProfile()
 void CameraBinAudioEncoder::applySettings(GstElement *encoder)
 {
     GObjectClass * const objectClass = G_OBJECT_GET_CLASS(encoder);
-    const char * const name = gst_plugin_feature_get_name(
-                GST_PLUGIN_FEATURE(gst_element_get_factory(encoder)));
+    const char * const name = qt_gst_element_get_factory_name(encoder);
 
     const bool isVorbis = qstrcmp(name, "vorbisenc") == 0;