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va: fix RGB32 LSB formats

Víctor Manuel Jáquez Leal requested to merge vjaquez/gst-plugins-bad:va-rgb32-formats into master 
va: filter: remove unsupported formats because driver's bugs

Add a way to filter out video formats from caps because of unresolved
bugs in drivers. In this case for media-driver (iHD) where some RGB32
formats are not handled correctly.
va: videoformats: Map more color formats.

Added Y212_LE, Y412_LE, P012_LE, Y444, RGB16, RGB and BGR10A2_LE in
the static map betwen VA and GStreamer color formats. This synchronize
the map used in gstremaer-vaapi and this plugin.
va: videoformats: Fix RGB32 mapping between VA and GStreamer.

Different VA drives might have different definitions for RGB32 color
formats because different bit interpretation. Sadly the specification
doesn't clarify these interpretations. So VA users have to figure out
what's the correct mapping with it's rendering color format
definition.

This patch aims to fix the static map structure after the
VAImageFormats are queried. There is another static map with the
different interpretations of the RGB32 formats, and compare them with
the given VAImageFormat, then with the GStreamer color format, update
the mapping table.

Finally, some RGB32 color formats were added.

Cc: @He_Junyan

Edited by Víctor Manuel Jáquez Leal

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