Function encode_prequantized_htj2k_97 

pub fn encode_prequantized_htj2k_97(
    image: &PrequantizedHtj2k97Image,
    options: &EncodeOptions,
) -> Result<Vec<u8>, &'static str>

Encode prequantized irreversible 9/7 code-block coefficients into an HTJ2K codestream.