Draft: d3d11h265dec: Add support RExt profiles for Intel devices
DXVA2 spec doesn't define HEVC Range Extenstions profiles, but Intel has its own implementation for the RExt profiles. Specifically, Intel seems to be using libva's VAPictureParameterBufferHEVCRext struct for signalling RExt profile data also in case of DXVA2. Although it's completely undocumented/undefined spec by Microsoft and Intel, it seems to be working.
Edited by Seungha Yang