[Bug 734650] New: videoscale: Does not support NV21 format

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=734650
  GStreamer | gst-plugins-base | unspecified

           Summary: videoscale: Does not support NV21 format
    Classification: Platform
           Product: GStreamer
           Version: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: sanjay.nm at samsung.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=283168)
 View: https://bugzilla.gnome.org/attachment.cgi?id=283168
 Review: https://bugzilla.gnome.org/review?bug=734650&attachment=283168

videoscale: Patch to support NV21 format

Videoscale plugin does not support NV21 format. Added support for this by
reusing the code of NV12 as NV21 just u, v are reversed and exactly same logic
could be reused.

Tested it with below pipeline and its working well

gst-launch-1.0 videotestsrc num-buffers=100 ! "video/x-raw, width=780" !
videoscale ! "video/x-raw, format={NV21}, width=1233" ! videoconvert !
autovideosink

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