INTERPOLATE_1D_SPLINE 1690 libavfilter/vf_lut3d.c         { "spline",  "use values from the spline interpolation",   0, AV_OPT_TYPE_CONST, {.i64=INTERPOLATE_1D_SPLINE},    INT_MIN, INT_MAX, FLAGS, "interp_mode" },
INTERPOLATE_1D_SPLINE 2026 libavfilter/vf_lut3d.c     case INTERPOLATE_1D_SPLINE:      SET_FUNC_1D(spline);   break;