av_int2sf          30 libavutil/softfloat.c     SoftFloat one= av_int2sf(1, 0);
av_int2sf          62 libavutil/softfloat.c         sf1= av_int2sf(i, 0);
av_int2sf          63 libavutil/softfloat.c         sf2= av_div_sf(av_int2sf(i, 2), av_int2sf(200, 3));