IFAST_SCALE_BITS   68 3rdparty/libjpeg/jdct.h #define IFAST_SCALE_BITS  2	/* fractional bits in scale factors */
IFAST_SCALE_BITS   71 3rdparty/libjpeg/jdct.h #define IFAST_SCALE_BITS  13	/* fractional bits in scale factors */