pub(crate) fn color_convert(
unprocessed: &[&[i16]; 4],
color_convert_16: fn(&[i16; 16], &[i16; 16], &[i16; 16], &mut [u8], &mut usize),
input_colorspace: ColorSpace,
output_colorspace: ColorSpace,
output: &mut [u8],
width: usize,
padded_width: usize,
) -> Result<(), DecodeErrors>