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Add polyphonism support to bridge.go

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This commit is contained in:
Veikko Sariola 2020-10-26 12:47:22 +02:00
parent 1d07b4f192
commit 7a9ac3489b
1 changed files with 6 additions and 0 deletions
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6
bridge/bridge.go
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@ -108,6 +108,7 @@ func (s *SynthState) SetPatch(patch Patch) error {
totalVoices := 0
commands := make([]Opcode, 0)
values := make([]byte, 0)
polyphonyBitmask := 0
for _, instr := range patch {
if len(instr.Units) > 63 {
return errors.New("An instrument can have a maximum of 63 units")
@ -121,6 +122,10 @@ func (s *SynthState) SetPatch(patch Patch) error {
}
commands = append(commands, Advance)
totalVoices += instr.NumVoices
for k := 0; k < instr.NumVoices-1; k++ {
polyphonyBitmask = (polyphonyBitmask << 1) + 1
}
polyphonyBitmask <<= 1
}
if totalVoices > 32 {
return errors.New("Sointu does not support more than 32 concurrent voices")
@ -139,6 +144,7 @@ func (s *SynthState) SetPatch(patch Patch) error {
cs.Values[i] = (C.uchar)(values[i])
}
cs.NumVoices = C.uint(totalVoices)
cs.Polyphony = C.uint(polyphonyBitmask)
return nil
}