IFAST_SCALE_BITS 316 3rdparty/libjpeg/jddctmgr.c CONST_BITS-IFAST_SCALE_BITS); IFAST_SCALE_BITS 132 3rdparty/libjpeg/jidctfst.c DESCALE((coef)*(quantval), IFAST_SCALE_BITS-PASS1_BITS)