ref: f46505e1adb56bcac9bbf00ec8b264dc50963764 dir: /jbig2_mmr.h/
int jbig2_decode_generic_mmr(Jbig2Ctx *ctx, int32_t seg_number, const Jbig2GenericRegionParams *params, const byte *data, size_t size, byte *gbreg);