u4u
A unipolar k rate function defined by 4 segments. It can be used to shape saw LFOs, enveloppes and many other control signals such as pitch (if you need to control a parameter depending on pitch)...
Inlets
frac32 in
Outlets
frac32 out
Parameters
frac32.u.mapvsl p0
frac32.u.mapvsl p1
frac32.u.mapvsl p2
frac32.u.mapvsl p3
frac32.u.mapvsl p4
Control Rate
if (inlet_in >= (1 << 27))
outlet_out = param_p4;
else if (inlet_in <= 0)
outlet_out = param_p0;
else {
int32_t i = inlet_in >> (27 - 2); // i [0 4[
int32_t a = (inlet_in & ((1 << (27 - 2)) - 1)); // a q25
if (i < 2) { // [0 2[
if (i < 1) { // [0 1[ q27 q25 q20 q27
outlet_out = ___SMMLA(param_p1 - param_p0, a, param_p0 >> 7) << 7;
} else { // [1 2[
outlet_out = ___SMMLA(param_p2 - param_p1, a, param_p1 >> 7) << 7;
}
} else { // [2 4[
if (i < 3) { // [2 3[
outlet_out = ___SMMLA(param_p3 - param_p2, a, param_p2 >> 7) << 7;
} else { // [3 4[
outlet_out = ___SMMLA(param_p4 - param_p3, a, param_p3 >> 7) << 7;
}
}
}