[DllImport("libgstreamer-0.10.dll") ]
static extern IntPtr gst_pad_template_new (IntPtr name_template, int direction, int presence, IntPtr caps);

[DllImport("libgstreamer-0.10.dll") ]
static extern IntPtr gst_caps_ref (IntPtr handle);

public PadTemplate (string name_template, Gst.PadDirection direction, Gst.PadPresence presence, Gst.Caps caps) : base (IntPtr.Zero) {
  if (GetType () != typeof (PadTemplate)) {
    ArrayList vals = new ArrayList();
    ArrayList names = new ArrayList();
    names.Add ("name_template");
    vals.Add (new GLib.Value (name_template));
    names.Add ("direction");
    vals.Add (new GLib.Value (direction));
    names.Add ("presence");
    vals.Add (new GLib.Value (presence));
    if (caps != null) {
      names.Add ("caps");
      vals.Add (new GLib.Value (caps));
    }
    CreateNativeObject ( (string[]) names.ToArray (typeof (string)), (GLib.Value[]) vals.ToArray (typeof (GLib.Value)));
    return;
  }
  IntPtr native_name_template = GLib.Marshaller.StringToPtrGStrdup (name_template);
  if (caps != null)
    gst_caps_ref (caps.Handle);

  Raw = gst_pad_template_new (native_name_template, (int) direction, (int) presence, caps == null ? IntPtr.Zero : caps.Handle);
  GLib.Marshaller.Free (native_name_template);
}