[FernetMenta]

Software rendering actually means not making use of shaders but having yuv-rgb conversion done by the CPU. This code path must be a remnant from the really old days. It can't be taken for most hw decoders because they don't allow getting data back from GPU to system memory. Consider this path as dead and deleted.
If I am not mistaken only Windows has more options: DXVA and Shaders. But I doubt there is much need for DXVA decoding in combination with shaders. Maybe move this to as.xml.