Add xtouch library for reading X-Touch Extender input events

main.go

@@ -3,35 +3,45 @@ package main
 import (
 	"fmt"
 	"os"
+	"os/signal"
+	"syscall"
 
 	"gitlab.com/gomidi/midi/v2"
 	_ "gitlab.com/gomidi/midi/v2/drivers/rtmididrv"
+
+	"qrun/xtouch"
 )
 
 func main() {
 	defer midi.CloseDriver()
 
-	inPorts := midi.GetInPorts()
-	outPorts := midi.GetOutPorts()
-
-	fmt.Println("MIDI Input Ports:")
-	if len(inPorts) == 0 {
-		fmt.Println("  (none)")
-	}
-	for i, port := range inPorts {
-		fmt.Printf("  [%d] %s\n", i, port)
-	}
-
-	fmt.Println("\nMIDI Output Ports:")
-	if len(outPorts) == 0 {
-		fmt.Println("  (none)")
-	}
-	for i, port := range outPorts {
-		fmt.Printf("  [%d] %s\n", i, port)
-	}
-
-	if len(inPorts) == 0 && len(outPorts) == 0 {
-		fmt.Println("\nNo MIDI devices found.")
+	port, err := xtouch.FindInPort("x-touch")
+	if err != nil {
+		fmt.Println("Available MIDI input ports:")
+		for _, p := range midi.GetInPorts() {
+			fmt.Printf("  %s\n", p)
+		}
+		fmt.Fprintf(os.Stderr, "\nError: %v\n", err)
 		os.Exit(1)
 	}
+
+	dec := &xtouch.Decoder{EncoderMode: xtouch.EncoderRelative}
+
+	fmt.Printf("Listening on: %s\n", port)
+
+	stop, err := midi.ListenTo(port, func(msg midi.Message, timestampms int32) {
+		if event := dec.Decode(msg); event != nil {
+			fmt.Println(event)
+		}
+	})
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error listening: %v\n", err)
+		os.Exit(1)
+	}
+	defer stop()
+
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
+	<-sig
+	fmt.Println()
 }