Function vaCreateImage 

pub unsafe extern "C" fn vaCreateImage(
    dpy: VADisplay,
    format: *mut VAImageFormat,
    width: c_int,
    height: c_int,
    image: *mut VAImage,
) -> VAStatus

Create a VAImage structure The width and height fields returned in the VAImage structure may get enlarged for some YUV formats. Upon return from this function, image->buf has been created and proper storage allocated by the library. The client can access the image through the Map/Unmap calls.