Avoid having our own custom stuff and instead use the modern, standard
types, for familiarity.

Everything in flags is already handled at a higher level.

It seems MFT h264 decoder does not support frame cropping. Which
means that if frame width or height is not multiple of 16 then
decoded output can potentially be used with wrong offset. This
code adds explicit parsing of SPS to extract cropping information
to use, and will apply cropping if reported size differs from
expected.

Linux implementation using ffmpeg