Function CMBlockBufferCreateWithBufferReference 

pub unsafe extern "C" fn CMBlockBufferCreateWithBufferReference(
    structureAllocator: CFAllocatorRef,
    bufferReference: CMBlockBufferRef,
    offsetToData: usize,
    dataLength: usize,
    flags: CMBlockBufferFlags,
    blockBufferOut: *mut CMBlockBufferRef,
) -> OSStatus