M_SOF1 2115 ext/exif/exif.c #define M_SOF1 0xC1 /* N indicates which compression process */ M_SOF1 327 ext/standard/image.c #define M_SOF1 0xC1 /* N indicates which compression process */ M_SOF1 44 ext/standard/iptc.c #define M_SOF1 0xC1 /* N indicates which compression process */