Function encode_preencoded_htj2k_97 

pub fn encode_preencoded_htj2k_97(
    image: &PreencodedHtj2k97Image,
    options: &EncodeOptions,
) -> Result<Vec<u8>, &'static str>

Encode preencoded irreversible 9/7 HTJ2K code-block payloads into a codestream.