[Bug 738914] video: Add a linear/affine transformation matrix meta

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=738914

Olivier Crête <olivier.crete at ocrete.ca> changed:

           What    |Removed                     |Added
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                 CC|                            |olivier.crete at ocrete.ca

--- Comment #7 from Olivier Crête <olivier.crete at ocrete.ca> ---
Would it make sense for qtdemux to first  try to decompose the matrix into
common simple elementary operations (scale & 90°/180°/270° rotations & flip),
and if it fails, then use the whole matrix meta? Then use simple operation meta
if possible and full matrix meta as a last resort.

If you have GL, then you get full functionality, if you don't then you get a
negotiation failure as the software elements (or non-GL hardware) will support
the simple operations. I'm going to assume that 99.99% of all files only do
simple operations (mostly 90° rotations).

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