pub unsafe extern "C" fn CMBlockBufferCreateContiguous(
structureAllocator: CFAllocatorRef,
sourceBuffer: CMBlockBufferRef,
blockAllocator: CFAllocatorRef,
customBlockSource: *const CMBlockBufferCustomBlockSource,
offsetToData: size_t,
dataLength: size_t,
flags: CMBlockBufferFlags,
blockBufferOut: *mut CMBlockBufferRef,
) -> OSStatus