130 lines
2.6 KiB
Go
130 lines
2.6 KiB
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
|
|
"github.com/charmbracelet/log"
|
|
"gitlab.com/gomidi/midi/v2"
|
|
"github.com/bendahl/uinput"
|
|
)
|
|
|
|
type Mapping interface {
|
|
Is(midi.Message) bool
|
|
TriggerIfMatch(midi.Message, uinput.Gamepad) error
|
|
Comment() string
|
|
}
|
|
|
|
type ButtonMapping struct {
|
|
comment string
|
|
midiChannel uint8
|
|
midiKey uint8
|
|
gamepadKey int
|
|
}
|
|
|
|
func (m ButtonMapping) Is(msg midi.Message) bool {
|
|
var channel, key uint8
|
|
|
|
switch {
|
|
case msg.GetNoteOn(&channel, &key, nil), msg.GetNoteOff(&channel, &key, nil):
|
|
return (m.midiChannel == channel && m.midiKey == key)
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
func (m ButtonMapping) TriggerIfMatch(msg midi.Message, virtGamepad uinput.Gamepad) error {
|
|
if m.Is(msg) {
|
|
var velocity uint8
|
|
msg.GetNoteOn(nil, nil, &velocity)
|
|
switch msg.Type() {
|
|
case midi.NoteOnMsg:
|
|
if velocity != 0 {
|
|
log.Debug(m.comment, "status", "down")
|
|
return virtGamepad.ButtonDown(m.gamepadKey)
|
|
}
|
|
fallthrough // if reached here, velocity is 0 -> NoteOff
|
|
case midi.NoteOffMsg:
|
|
log.Debug(m.comment, "status", "up")
|
|
return virtGamepad.ButtonUp(m.gamepadKey)
|
|
default:
|
|
return fmt.Errorf("Invalid message type triggered ButtonMapping")
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (m ButtonMapping) Comment() string {
|
|
return m.comment
|
|
}
|
|
|
|
type ControllerAxis int
|
|
|
|
const (
|
|
LeftX ControllerAxis = iota
|
|
LeftY
|
|
RightX
|
|
RightY
|
|
)
|
|
|
|
type ControlMapping struct {
|
|
comment string
|
|
midiChannel uint8
|
|
midiController uint8
|
|
axis ControllerAxis
|
|
isSigned bool
|
|
deadzone float64
|
|
}
|
|
|
|
func (m ControlMapping) Is(msg midi.Message) bool {
|
|
var channel, controller uint8
|
|
|
|
if msg.GetControlChange(&channel, &controller, nil) {
|
|
return (m.midiChannel == channel && m.midiController == controller)
|
|
} else {
|
|
return false
|
|
}
|
|
}
|
|
|
|
func (m ControlMapping) TriggerIfMatch(msg midi.Message, virtGamepad uinput.Gamepad) error {
|
|
if m.Is(msg) {
|
|
var (
|
|
valueAbsolute uint8
|
|
valueNormalised float64
|
|
)
|
|
|
|
msg.GetControlChange(nil, nil, &valueAbsolute)
|
|
|
|
// value is 0-127, normalise
|
|
valueNormalised = float64(valueAbsolute) / 127
|
|
if m.isSigned {
|
|
valueNormalised *= 2
|
|
valueNormalised -= 1
|
|
}
|
|
|
|
if math.Abs(valueNormalised) < m.deadzone {
|
|
valueNormalised = 0
|
|
}
|
|
|
|
log.Debug(m.comment, "value", valueNormalised, "deadzone", m.deadzone)
|
|
|
|
switch m.axis {
|
|
case LeftX:
|
|
return virtGamepad.LeftStickMoveX(float32(valueNormalised))
|
|
case LeftY:
|
|
return virtGamepad.LeftStickMoveY(float32(valueNormalised))
|
|
case RightX:
|
|
return virtGamepad.RightStickMoveX(float32(valueNormalised))
|
|
case RightY:
|
|
return virtGamepad.RightStickMoveY(float32(valueNormalised))
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (m ControlMapping) Comment() string {
|
|
return m.comment
|
|
}
|