[Bug 740228] New: video-blend: fix blending of rectangles partially or fully outside of the video

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=740228
  GStreamer | gst-plugins-base | git

           Summary: video-blend: fix blending of rectangles partially or
                    fully outside of the video
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: t.i.m at zen.co.uk
         QAContact: gstreamer-bugs at lists.freedesktop.org
                CC: t.i.m at zen.co.uk, slomo at coaxion.net,
                    luis.bg at samsung.com, lazar.claudiu.florin at gmail.com,
                    vineeth.tm at samsung.com
     GNOME version: ---


+++ This bug was initially created as a clone of Bug #739281 +++

Two issues:

a) our GstVideoFormatUnpack functions for the various video formats seem to
completely ignore the x parameter.

b) GstVideoFormatPack does not seem to have an x parameter; this is
unfortunate, since it means we need to unpack/pack a lot of pixels we don't
actually need at all (e.g. when blending pixels of a logo somewhere we'd need
to unpack/pack from x=0 to x=logo_xpos+logo_width instead of from x=logo_xpos
to x=logo_xpos+logo_width (unless we manually adjust row pointers we pass I
guess, which won't work well for complex formats)

-- 
Configure bugmail: https://bugzilla.gnome.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug.
You are the assignee for the bug.