[Bug 796499] New: Changing the returned data from the buffer so that it can be modified an read without copying

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796499

            Bug ID: 796499
           Summary: Changing the returned data from the buffer so that it
                    can be modified an read without copying
    Classification: Platform
           Product: GStreamer
           Version: 1.4.1
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-python
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: d.klamt at pengutronix.de
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

The map function of the buffer element has returned a copy of the c buffer as
an bytes object as MapInfo.data. This is bad when you want to edit the video
buffer in an gst-python element because teh bytes element always copies the
Data.

Therefor i changed the Buffer functions map and unmap and the class MapInfo to
return the data as an memory-view on the c buffer
The MapInfo class has the same attributes as before and should be compatible

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