[Bug 739281] video-blend: correct improper logic calculations

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=739281
  GStreamer | gst-plugins-base | unspecified

Tim-Philipp Müller <t.i.m> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #289889|none                        |rejected
             status|                            |

--- Comment #39 from Tim-Philipp Müller <t.i.m at zen.co.uk> 2014-11-05 21:06:39 UTC ---
(From update of attachment 289889)
Thanks for the patch, but I'm going to reject this for now, in the context of
this bug. I think we can easily correct for this problem in the unpack function
inside our blend function, since the source format is always ARGB of some sort.

Please file a separate bug for this issue. When we fix it, it should be fixed
for all formats, and we want a unit test that makes sure it actually works
properly for all formats :)

I don't want to block this bug on this being implemented. If it happens, that's
great of course, but if not we can work around it, so do that for starters.

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