[Bug 796730] New: A bug in DynamicSignal.Emit for webrtcbin

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796730

            Bug ID: 796730
           Summary: A bug in DynamicSignal.Emit for webrtcbin
    Classification: Platform
           Product: GStreamer
           Version: 1.14.1
                OS: Windows
            Status: NEW
          Severity: major
          Priority: Normal
         Component: gst-sharp
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: tomislavtustonic at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 372906
  --> https://bugzilla.gnome.org/attachment.cgi?id=372906&action=edit
A bug repro.

Hello

I'm trying to implement the WebRtc demo
(https://github.com/centricular/gstwebrtc-demos/blob/master/sendrecv/gst/webrtc-sendrecv.py)
in C#, and I have encountered the AccessViolationException when trying to emit
a signal from the webrtcbin.

Unhandled Exception: System.AccessViolationException: Attempted to read or
write protected memory. This is often an indication that other memory is
corrupt.
   at GLib.GType.g_type_name(IntPtr raw)
   at GLib.GType.LookupType(IntPtr typeid)
   at Gst.DynamicSignal.Emit(Object o, String name, Object[] parameters)
   at Gst.Object.Emit(String signal, Object[] parameters)
   at ConsoleApp1.Program.Main(String[] args) in \Program.cs:line 16

It seems that the type ID obtained in the call (DynamicSignal.cs, line 383)

IntPtr t = Marshal.ReadIntPtr (q.param_types, i);

is invalid and it throws in the line 389 (casting to Type, which calls
LookupType in GLib).

I tried with the glib-sharp which is a part of gstreamer-sharp Nuget package,
and the GLibSharp from the Nuget package
https://www.nuget.org/packages/GLibSharp/3.22.24.36/

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