mirror/sointu
1
0
Fork 0
mirror of https://github.com/vsariola/sointu.git synced 2026-04-12 17:14:43 -04:00
Code Issues Packages Projects Releases Wiki Activity

drafting increasing maximum voice numbers to 256

Browse Source
This commit is contained in:
5684185+vsariola@users.noreply.github.com
2026-04-04 02:41:34 +03:00
parent ac218e7e54
commit 44ee37882b
18 changed files with 821 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
vm/bytecode.go
View File

@ -42,7 +42,7 @@ type (
// example, if first instrument has 3 voices, second instrument has 2
// voices, and third instrument four voices, the PolyphonyBitmask is: (MSB)
// 110101110 (LSB)
PolyphonyBitmask uint32
PolyphonyBitmask []byte
// NumVoices is the total number of voices in the patch
NumVoices uint32
@ -69,8 +69,8 @@ type bytecodeBuilder struct {
}
func NewBytecode(patch sointu.Patch, featureSet FeatureSet, bpm int) (*Bytecode, error) {
if patch.NumVoices() > 32 {
return nil, fmt.Errorf("Sointu does not support more than 32 concurrent voices; patch uses %v", patch.NumVoices())
if patch.NumVoices() > MAX_VOICES {
return nil, fmt.Errorf("Sointu does not support more than %d concurrent voices; patch uses %v", MAX_VOICES, patch.NumVoices())
}
b := newBytecodeBuilder(patch, bpm)
for instrIndex, instr := range patch {
@ -213,12 +213,13 @@ func NewBytecode(patch sointu.Patch, featureSet FeatureSet, bpm int) (*Bytecode,
}
func newBytecodeBuilder(patch sointu.Patch, bpm int) *bytecodeBuilder {
var polyphonyBitmask uint32 = 0
var polyphonyBitmask []byte = make([]byte, (patch.NumVoices()+7)/8) // 1 bit per voice, rounded up to full bytes
for _, instr := range patch {
for j := 0; j < instr.NumVoices-1; j++ {
polyphonyBitmask = (polyphonyBitmask << 1) + 1 // for each instrument, NumVoices - 1 bits are ones
shiftLeftMask(polyphonyBitmask)
polyphonyBitmask[0] += 1 // for each instrument, NumVoices - 1 bits are ones
}
polyphonyBitmask <<= 1 // ...and the last bit is zero, to denote "change instrument"
shiftLeftMask(polyphonyBitmask) // ...and the last bit is zero, to denote "change instrument"
}
delayTimesInt, delayIndices := constructDelayTimeTable(patch, bpm)
delayTimesU16 := make([]uint16, len(delayTimesInt))
@ -236,6 +237,13 @@ func newBytecodeBuilder(patch sointu.Patch, bpm int) *bytecodeBuilder {
return &c
}
func shiftLeftMask(b []byte) {
var carry byte = 0
for i := range b {
carry, b[i] = b[i]&128, (b[i]<<1)+(carry>>7)
}
}
// op adds a command to the bytecode, and increments the unit number
func (b *bytecodeBuilder) op(opcode int) {
b.Opcodes = append(b.Opcodes, byte(opcode))