[Bug 796690] New: A bug in PlaybackTutorial7.cs

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796690

            Bug ID: 796690
           Summary: A bug in PlaybackTutorial7.cs
    Classification: Platform
           Product: GStreamer
           Version: 1.14.1
                OS: Windows
            Status: NEW
          Severity: normal
          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 372841
  --> https://bugzilla.gnome.org/attachment.cgi?id=372841&action=edit
a patch for PlaybackTutorial7

Hello

There is a bug in PlaybackTutorial7.cs
(https://github.com/GStreamer/gstreamer-sharp/blob/master/samples/PlaybackTutorial7.cs)

In the original tutorial the pipelines custom audio-sink is set before starting
playing, while in C# the custom sink is set after. The result is that equalizer
has no effect. 

When I set the audio-sink before playing (see a patch), the equalizer works
fine, but when setting pipeline state to State.Null I get the following
exception:

Unhandled Exception: System.AccessViolationException: Attempted to read or
write protected memory. This is often an indication that other memory is
corrupt.
   at Gst.Element.gst_element_set_state(IntPtr raw, Int32 state)
   at Gst.Element.SetState(State state)
   at GstreamerSharp.Playback.Main(String[] args) in
...\PlaybackTutorial7.cs:line 61

Should I open the new bug for this AccessViolationException ?

Cheers, Tom

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