d3d11convert,d3d11videosink,d3d11compositor: Add gamma-mode and primaries-mode properties
As of the MR !2581 (merged),
GstD3D11Converter
converts transfer functions and/or primaries if needed but it requires additional
processing power.
Adding gamma-mode
and primaries-mode
properties (identical to that of videoconvert
element) to control the conversion behavior.
Edited by Seungha Yang