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feat: Delays and samples are now working through the bridge.

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One should call bridge.Init() once during the initialization of the program to load the static sample table. On linux, bridge.Init() does nothing.
This commit is contained in:
Veikko Sariola
2020-11-08 16:03:10 +02:00
parent e65b08d2b3
commit bcbb5aaf19
12 changed files with 155 additions and 50 deletions
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36
go4k/bridge/bridge.go
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@ -34,7 +34,7 @@ var opcodeTable = map[string]opTableEntry{
"filter": opTableEntry{C.su_filter_id, []string{"frequency", "resonance"}},
"clip": opTableEntry{C.su_clip_id, []string{}},
"pan": opTableEntry{C.su_pan_id, []string{"panning"}},
"delay": opTableEntry{C.su_delay_id, []string{"pregain", "dry", "feedback", "damp", "damp", "delay", "count"}},
"delay": opTableEntry{C.su_delay_id, []string{"pregain", "dry", "feedback", "damp", "delaycount"}},
"compressor": opTableEntry{C.su_compres_id, []string{"attack", "release", "invgain", "threshold", "ratio"}},
"speed": opTableEntry{C.su_speed_id, []string{}},
"out": opTableEntry{C.su_out_id, []string{"gain"}},
@ -80,6 +80,9 @@ func (synth *C.Synth) Render(buffer []float32, maxtime int) (int, int, error) {
}
func Synth(patch go4k.Patch) (*C.Synth, error) {
s := new(C.Synth)
sampleno := 0
delaytimeno := 0
totalVoices := 0
commands := make([]byte, 0)
values := make([]byte, 0)
@ -99,13 +102,31 @@ func Synth(patch go4k.Patch) (*C.Synth, error) {
}
commands = append(commands, byte(opCode))
for _, paramname := range val.parameterList {
if pval, ok := unit.Parameters[paramname]; ok {
if unit.Type == "delay" && paramname == "count" {
pval = pval*2 - 1
if val, ok := unit.Parameters["notetracking"]; ok && val == 1 {
pval++
}
if unit.Type == "delay" && paramname == "delaycount" {
if unit.Stereo && len(unit.DelayTimes)%2 != 0 {
return nil, errors.New("Stereo delays should have even number of delaytimes")
}
values = append(values, byte(delaytimeno))
for _, v := range unit.DelayTimes {
s.DelayTimes[delaytimeno] = C.ushort(v)
delaytimeno++
}
count := len(unit.DelayTimes)
if unit.Stereo {
count /= 2
}
count = count*2 - 1
if unit.Parameters["notetracking"] == 1 {
count++
}
values = append(values, byte(count))
} else if unit.Type == "oscillator" && unit.Parameters["type"] == go4k.Sample && paramname == "color" {
values = append(values, byte(sampleno))
s.SampleOffsets[sampleno].Start = (C.uint)(unit.Parameters["start"])
s.SampleOffsets[sampleno].LoopStart = (C.ushort)(unit.Parameters["loopstart"])
s.SampleOffsets[sampleno].LoopLength = (C.ushort)(unit.Parameters["looplength"])
sampleno++
} else if pval, ok := unit.Parameters[paramname]; ok {
values = append(values, byte(pval))
} else {
return nil, fmt.Errorf("Unit parameter undefined: %v (at instrument %v, unit %v)", paramname, insid, unitid)
@ -178,7 +199,6 @@ func Synth(patch go4k.Patch) (*C.Synth, error) {
if len(values) > 16384 { // TODO: 16384 could probably be pulled automatically from cgo
return nil, errors.New("The patch would result in more than 16384 values")
}
s := new(C.Synth)
for i := range commands {
s.Commands[i] = (C.uchar)(commands[i])
}