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 ExampleStream_WriteSysEx() {
out, err := portmidi.NewOutputStream(portmidi.DefaultOutputDeviceID(), 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 ExampleStream_WriteSysExBytes() {
out, err := portmidi.NewOutputStream(portmidi.DefaultOutputDeviceID(), 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 run() error {
s, err := portmidi.NewOutputStream(portmidi.DeviceId(*deviceN), 1024, 0)
if err != nil {
return err
}
defer s.Close()
ls := &lockedStream{s: s}
quit := make(chan bool)
spd := 1000 * time.Millisecond
n1 := make(chan Note)
g1 := generator{
minN: 48, maxN: 72,
minD: spd,
maxD: 4 * spd,
stepD: spd / 8,
scale: dorian,
ringLen: 16,
noteP: 4,
timeP: 2,
switchP: 16,
}
go g1.run(n1, quit)
go play(ls, 2, n1, quit)
n2 := make(chan Note)
g2 := generator{
minN: 36, maxN: 60,
minD: 4 * spd,
maxD: 16 * spd,
stepD: spd,
scale: dorian,
ringLen: 4,
noteP: 2,
timeP: 2,
switchP: 4,
}
go g2.run(n2, quit)
go play(ls, 3, n2, quit)
b := make([]byte, 1)
os.Stdin.Read(b)
close(quit)
time.Sleep(time.Second)
return nil
}
// Open opens a connection Launchpad and initializes an input and output
// stream to the currently connected device. If there are no
// devices are connected, it returns an error.
func Open() (*Launchpad, error) {
input, output, err := discover()
if err != nil {
return nil, err
}
var inStream, outStream *portmidi.Stream
if inStream, err = portmidi.NewInputStream(input, 1024); err != nil {
return nil, err
}
if outStream, err = portmidi.NewOutputStream(output, 1024, 0); err != nil {
return nil, err
}
return &Launchpad{inputStream: inStream, outputStream: outStream}, nil
}
func midiOpen(argv []*ell.Object) (*ell.Object, error) {
// defaultInput := "USB Oxygen 8 v2"
// defaultOutput := "IAC Driver Bus 1"
latency := int64(10)
if !midiOpened {
err := portmidi.Initialize()
if err != nil {
return nil, err
}
midiOpened = true
midiInDevice = ell.StringValue(argv[0])
midiOutDevice = ell.StringValue(argv[1])
midiBufsize = ell.Int64Value(argv[2])
outdev, outname := findMidiOutputDevice(midiOutDevice)
out, err := portmidi.NewOutputStream(outdev, midiBufsize, latency)
if err != nil {
return nil, err
}
midiOut = out
midiOutDevice = outname
if midiInDevice != "" {
indev := findMidiInputDevice(midiInDevice)
if indev >= 0 {
in, err := portmidi.NewInputStream(indev, midiBufsize)
if err != nil {
return nil, err
}
midiIn = in
}
}
midiBaseTime = ell.Now()
}
result := ell.MakeStruct(4)
if midiInDevice != "" {
ell.Put(result, inputKey, ell.String(midiInDevice))
}
if midiOutDevice != "" {
ell.Put(result, outputKey, ell.String(midiOutDevice))
}
ell.Put(result, bufsizeKey, ell.Number(float64(midiBufsize)))
return result, nil
}
func initPortMidi() *portmidi.Stream {
portmidi.Initialize()
deviceCount := portmidi.CountDevices()
fmt.Println("Number of MIDI devices: ", deviceCount)
dev := portmidi.DeviceId(3 - 1)
for i := 0; i < deviceCount; i++ {
id := portmidi.DeviceId(i)
fmt.Println("Index ", i, "Id", id, " Device ", *portmidi.GetDeviceInfo(id))
}
out, err := portmidi.NewOutputStream(dev, 0, 0)
if err == nil {
fmt.Println("used device info: ", *portmidi.GetDeviceInfo(dev))
} else {
fmt.Println("Error: ", err)
os.Exit(2)
}
return out
}
func main() {
var (
ccValue int64
ccNumber int64
deviceId portmidi.DeviceId
err error
)
ccNumber, ccValue, err = parseArgs(os.Args)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
portmidi.Initialize()
defer portmidi.Terminate()
deviceId, err = getDeviceId()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
out, err := portmidi.NewOutputStream(deviceId, 1024, 0)
if err != nil {
fmt.Println("Error opening MicroBrute output port:", err)
os.Exit(1)
}
err = out.WriteShort(ccMessage, ccNumber, ccValue)
if err != nil {
fmt.Println("Error sending message to MicroBrute:", err)
os.Exit(1)
}
}
func main() {
flag.Parse()
var err error
if err = portmidi.Initialize(); err != nil {
log.Fatal("error while initializing portmidi", err)
}
if out, err = portmidi.NewOutputStream(portmidi.DeviceID(*flagOutput), 1024, 0); err != nil {
log.Fatal("error while initializing connection to midi out stream")
}
if pad, err = launchpad.Open(); err != nil {
log.Fatal("error while initializing connection to launchpad", err)
}
grid = newGrid()
instruments = []int{
70, // maracas
38, // snare 1
40, // snare 2
51, // ride cymbal
42, // closed hi-hat
58, // vibra slap
46, // open hi-hat
81} // open triangle
// load an initial drum pattern
// hi-hats
grid[0][4] = true
grid[2][4] = true
grid[4][4] = true
grid[6][4] = true
// snares
grid[5][3] = true
grid[5][2] = true
grid[5][1] = true
// bells
grid[6][7] = true
grid[7][7] = true
grid[5][6] = true
// clear
pad.Reset()
// listen button toggles
ch := pad.Listen()
go func() {
for {
hit := <-ch
log.Println("drum toggled at", hit)
if hit.Y == -1 || hit.X > 7 {
// a controller button is hit
continue
}
grid[hit.X][hit.Y] = !grid[hit.X][hit.Y]
if !grid[hit.X][hit.Y] {
// turn off immediately
pad.Light(hit.X, hit.Y, 0, 0)
}
}
}()
for {
for x := 0; x < NumberofHGrids; x++ {
tick(x)
}
}
}