atan2f            162 libavcodec/aacps_tablegen.h                 alpha = 0.5f * atan2f(2.0f * c * rho, c*c - 1.0f);
atan2f            345 libavfilter/vf_signalstats.c             ((int16_t*)p_hue)[i] = floor((180 / M_PI) * atan2f(yuvu-128, yuvv-128) + 180);