IOSurfaceRef holds the shared texture. Note that this IOSurface is local to current process (not global).
Structure contains planes of shared texture.
NT HANDLE holds the shared texture. Note that this NT HANDLE is local to current process. Output textures of rgba, bgra, rgbaf16 formats don't have a keyed mutex on the texture handle, but nv12 format texture handles do have a keyed mutex.
rgba
bgra
rgbaf16
nv12