Function CMTextFormatDescriptionCreateFromBigEndianTextDescriptionBlockBuffer 

pub unsafe extern "C" fn CMTextFormatDescriptionCreateFromBigEndianTextDescriptionBlockBuffer(
    allocator: CFAllocatorRef,
    textDescriptionBlockBuffer: CMBlockBufferRef,
    flavor: CMTextDescriptionFlavor,
    mediaType: CMMediaType,
    formatDescriptionOut: *mut CMTextFormatDescriptionRef,
) -> OSStatus