stereo_position  1122 libavfilter/af_surround.c         stereo_position(mag_dif, phase_dif, &x, &y);
stereo_position  1158 libavfilter/af_surround.c         stereo_position(mag_dif, phase_dif, &x, &y);
stereo_position  1193 libavfilter/af_surround.c         stereo_position(mag_dif, phase_dif, &x, &y);
stereo_position  1245 libavfilter/af_surround.c         stereo_position(mag_difl, phase_difl, &xl, &yl);
stereo_position  1246 libavfilter/af_surround.c         stereo_position(mag_difr, phase_difr, &xr, &yr);
stereo_position  1304 libavfilter/af_surround.c         stereo_position(mag_difl, phase_difl, &xl, &yl);
stereo_position  1305 libavfilter/af_surround.c         stereo_position(mag_difr, phase_difr, &xr, &yr);
stereo_position  1363 libavfilter/af_surround.c         stereo_position(mag_difl, phase_difl, &xl, &yl);
stereo_position  1364 libavfilter/af_surround.c         stereo_position(mag_difr, phase_difr, &xr, &yr);