ID3D11VideoContext::DecryptionBlt

DX11 vtable[56] → void

ID3D11VideoContext::DecryptionBlt is a method of the COM interface ID3D11VideoContext in Direct3D 11. Its function pointer sits at vtable index 56 — the zero-based slot in that interface's virtual method table, counted from QueryInterface and including every entry inherited from a base interface. It takes 8 parameters (session, src_surface, dst_surface, block_info, key_size, key, iv_size, iv) and returns void.

COM methods are reached through that table rather than by an exported name, so the slot index is what a wrapper, an interface hook or a disassembly listing has to resolve against. The parameter order and types below are the ones this interface declares.