func (o *Object) init() {
var p interface{}
switch o.Kind {
case "clip":
p = audio.NewClip()
case "delay":
p = audio.NewDelay()
case "engine":
p = audio.NewEngine()
case "env":
p = audio.NewEnv()
case "mul":
p = audio.NewMul()
case "noise":
p = audio.NewNoise()
case "quant":
p = audio.NewQuant()
case "rand":
p = audio.NewRand()
case "saw":
p = audio.NewBandLimitedSaw()
case "sin":
p = audio.NewSin()
case "skip":
p = audio.NewSkip()
case "sequencer":
p = audio.NewStep()
case "square":
p = audio.NewBandLimitedSquare()
case "sum":
p = audio.NewSum()
case "triangle":
p = audio.NewBandLimitedTriangle()
case "value":
p = audio.Value(o.Value)
case "gate":
p = midi.NewGate()
case "note":
p = midi.NewNote()
default:
panic("bad kind: " + o.Kind)
}
var dup *audio.Dup
if proc, ok := p.(audio.Processor); ok {
dup = audio.NewDup(proc)
}
o.proc = p
o.dup = dup
o.output = make(map[dest]*audio.Output)
}
func NewObject(name, kind string, value float64) *Object {
var p interface{}
switch kind {
case "clip":
p = audio.NewClip()
case "engine":
p = audio.NewEngine()
case "env":
p = audio.NewEnv()
case "mul":
p = audio.NewMul()
case "rand":
p = audio.NewRand()
case "sin":
p = audio.NewSin()
case "square":
p = audio.NewSquare()
case "sum":
p = audio.NewSum()
case "value":
p = audio.Value(value)
case "note":
p = audio.NewMidiNote()
case "gate":
p = audio.NewMidiGate()
default:
panic("bad kind: " + kind)
}
var dup *audio.Dup
if proc, ok := p.(audio.Processor); ok {
dup = audio.NewDup(proc)
}
return &Object{
Name: name,
Kind: kind,
Value: value,
Input: make(map[string]string),
proc: p,
dup: dup,
output: make(map[dest]*audio.Output),
}
}
func main() {
flag.Usage = func() {
fmt.Fprint(os.Stderr, usage)
flag.PrintDefaults()
os.Exit(2)
}
flag.Parse()
if flag.NArg() != 1 {
flag.Usage()
}
p, err := drum.DecodeFile(flag.Arg(0))
if err != nil {
log.Fatalf("cannot decode splice file: %v", err)
}
if *showInfo {
fmt.Print(p)
return
}
patches, err := readPatches(p, *sampleDir)
if err != nil {
log.Fatalf("cannot read sample patches: %v", err)
}
drumMod, err := drummachine.New(p, patches)
if err != nil {
log.Fatalf("cannot make new drum machine: %v", err)
}
portaudio.Initialize()
defer portaudio.Terminate()
portmidi.Initialize()
defer portmidi.Terminate()
e := audio.NewEngine()
e.Input("in", drumMod)
if err := e.Start(); err != nil {
panic(err)
}
select {}
}
func demo() error {
e := audio.NewEngine()
e.Input("in", audio.NewSin())
if err := e.Start(); err != nil {
return err
}
time.Sleep(time.Second)
if err := e.Stop(); err != nil {
return err
}
u, err := ui.New()
if err != nil {
return err
}
for _, m := range []*ui.Message{
{Action: "new", Name: "sin1", Kind: "sin"},
{Action: "new", Name: "sin2", Kind: "sin"},
{Action: "new", Name: "sum1", Kind: "sum"},
{Action: "new", Name: "mul1", Kind: "mul"},
{Action: "new", Name: "mul2", Kind: "mul"},
{Action: "new", Name: "val1", Kind: "value", Value: 0.1},
{Action: "connect", From: "sin1", To: "engine", Input: "in"},
{Action: "connect", From: "mul1", To: "sin1", Input: "pitch"},
{Action: "connect", From: "sin2", To: "mul1", Input: "a"},
{Action: "connect", From: "val1", To: "mul1", Input: "b"},
{Action: "connect", From: "val1", To: "sin2", Input: "pitch"},
} {
if err := u.Handle(m); err != nil {
return err
}
}
time.Sleep(time.Second)
for _, m := range []*ui.Message{
{Action: "set", Name: "val1", Value: 0.15},
} {
if err := u.Handle(m); err != nil {
return err
}
}
time.Sleep(time.Second)
if err := u.Close(); err != nil {
return err
}
e = audio.NewEngine()
sinMod := audio.NewSin()
sinMod.Input("pitch", audio.Value(-0.1))
sinModMul := audio.NewMul()
sinModMul.Input("a", sinMod)
sinModMul.Input("b", audio.Value(0.1))
sin := audio.NewSin()
sin.Input("pitch", sinModMul)
envMod := audio.NewSin()
envMod.Input("pitch", audio.Value(-1))
envModMul := audio.NewMul()
envModMul.Input("a", envMod)
envModMul.Input("b", audio.Value(0.02))
envModSum := audio.NewSum()
envModSum.Input("a", envModMul)
envModSum.Input("b", audio.Value(0.021))
sin2 := audio.NewSin()
sin2.Input("pitch", audio.Value(-0.6))
env := audio.NewEnv()
env.Input("trig", sin2)
env.Input("att", audio.Value(0.0001))
env.Input("dec", envModSum)
mul := audio.NewMul()
mul.Input("a", sin)
mul.Input("b", env)
mulMul := audio.NewMul()
mulMul.Input("a", mul)
mulMul.Input("b", audio.Value(0.5))
e.Input("in", mulMul)
if err := e.Start(); err != nil {
return err
}
os.Stdout.Write([]byte("Press enter to stop...\n"))
os.Stdin.Read([]byte{0})
return e.Stop()
}
func demo() error {
e := audio.NewEngine()
e.Input("in", audio.NewSin())
if err := e.Start(); err != nil {
return err
}
time.Sleep(time.Second)
if err := e.Stop(); err != nil {
return err
}
e = audio.NewEngine()
sinMod := audio.NewSin()
sinMod.Input("pitch", audio.Value(-0.1))
sinModMul := audio.NewMul()
sinModMul.Input("a", sinMod)
sinModMul.Input("b", audio.Value(0.1))
sin := audio.NewSin()
sin.Input("pitch", sinModMul)
envMod := audio.NewSin()
envMod.Input("pitch", audio.Value(-1))
envModMul := audio.NewMul()
envModMul.Input("a", envMod)
envModMul.Input("b", audio.Value(0.02))
envModSum := audio.NewSum()
envModSum.Input("a", envModMul)
envModSum.Input("b", audio.Value(0.021))
sin2 := audio.NewSin()
sin2.Input("pitch", audio.Value(-0.6))
env := audio.NewEnv()
env.Input("trig", sin2)
env.Input("att", audio.Value(0.0001))
env.Input("dec", envModSum)
mul := audio.NewMul()
mul.Input("a", sin)
mul.Input("b", env)
mulMul := audio.NewMul()
mulMul.Input("a", mul)
mulMul.Input("b", audio.Value(0.5))
e.Input("in", mulMul)
if err := e.Start(); err != nil {
return err
}
os.Stdout.Write([]byte("Press enter to stop...\n"))
os.Stdin.Read([]byte{0})
return e.Stop()
}