func main() {
dev := flag.String("d", "/dev/input/by-id/usb-0810_Twin_USB_Joystick-event-joystick", "The GH controller event device")
flag.Int64Var(&baseNote, "b", 48, "The base midi note with no button pressed")
flag.Int64Var(&vel, "v", 100, "Midi note velocity")
flag.Int64Var(&midiChan, "c", 1, "Midi channel")
flag.Parse()
portmidi.Initialize()
out, err := portmidi.NewOutputStream(portmidi.GetDefaultOutputDeviceId(), 32, 0)
if err != nil {
fmt.Println(err)
return
}
c := make(chan *evdev.InputEvent)
e := make(chan error)
go ReadGuitar(c, e, *dev)
for {
select {
case but := <-c:
switch but.Code {
case butGreen, butRed, butYellow, butBlue, butOrange:
SetNote(butMap[but.Code], but.Value)
if playing != -1 {
SwapNote(out, baseNote+butState+octave, vel)
}
case butStrumbar:
if but.Value == 255 || but.Value == 0 {
NoteOn(out, baseNote+butState+octave, vel)
} else if !hold {
NoteOff(out, playing, vel)
}
case butSelect:
if but.Value != 0 {
hold = !hold
if !hold {
NoteOff(out, playing, vel)
}
}
case butTilt:
if but.Value == 1 {
octave += 12
} else {
octave -= 12
}
if playing != -1 {
SwapNote(out, baseNote+butState+octave, vel)
}
case butStart:
AllNotesOff(out)
}
case err := <-e:
fmt.Println(err)
close(c)
close(e)
return
default:
}
}
}
func ExampleWriteSysExBytes() {
out, err := portmidi.NewOutputStream(portmidi.GetDefaultOutputDeviceId(), 1024, 0)
if err != nil {
log.Fatal(err)
}
if err = out.WriteSysExBytes(portmidi.Time(), []byte{0xF0, 0x0A, 0x0A, 0x1B, 0x00, 0x7F, 0x30, 0xF7}); err != nil {
log.Fatal(err)
}
}
func ExampleWriteSysEx() {
out, err := portmidi.NewOutputStream(portmidi.GetDefaultOutputDeviceId(), 1024, 0)
if err != nil {
log.Fatal(err)
}
if err = out.WriteSysEx(portmidi.Time(), "F0 0A 0A 1B 00 7F 30 F7"); err != nil {
log.Fatal(err)
}
}
func findMidiOutputDevice(name string) (portmidi.DeviceId, string) {
devcount := portmidi.CountDevices()
for i := 0; i < devcount; i++ {
id := portmidi.DeviceId(i)
info := portmidi.GetDeviceInfo(id)
if info.IsOutputAvailable {
if info.Name == name {
return id, info.Name
}
}
}
id := portmidi.GetDefaultOutputDeviceId()
info := portmidi.GetDeviceInfo(id)
return id, info.Name
}