add script to send osc bytes to stdout

cmd/makeosc/makeosc.go

@@ -0,0 +1,127 @@
+package main
+
+import (
+	"encoding/hex"
+	"fmt"
+	"os"
+	"strconv"
+
+	"github.com/jwetzell/osc-go/pkg/osc"
+
+	"github.com/spf13/cobra"
+)
+
+func main() {
+	var Address string
+	var Args []string
+	var Types []string
+	var Slip bool
+
+	var rootCmd = &cobra.Command{
+		Use: "sendosc",
+		Run: func(cmd *cobra.Command, args []string) {
+			make(Address, Args, Types, Slip)
+		},
+	}
+	rootCmd.Flags().StringVar(&Address, "address", "", "OSC address")
+	rootCmd.Flags().StringArrayVar(&Args, "arg", []string{}, "OSC args")
+	rootCmd.Flags().StringArrayVar(&Types, "type", []string{}, "OSC types")
+	rootCmd.Flags().BoolVar(&Slip, "slip", false, "whether to slip encode the OSC Message bytes")
+	rootCmd.MarkFlagRequired("address")
+	rootCmd.Execute()
+}
+
+func argToTypedArg(rawArg string, oscType string) osc.OSCArg {
+	switch oscType {
+	case "s":
+		return osc.OSCArg{
+			Type:  "s",
+			Value: rawArg,
+		}
+	case "i":
+		number, err := strconv.ParseInt(rawArg, 10, 32)
+		if err != nil {
+			// ... handle error
+			panic(err)
+		}
+		return osc.OSCArg{
+			Type:  "i",
+			Value: int32(number),
+		}
+	case "f":
+		number, err := strconv.ParseFloat(rawArg, 32)
+		if err != nil {
+			// ... handle error
+			panic(err)
+		}
+		return osc.OSCArg{
+			Type:  "f",
+			Value: float32(number),
+		}
+	case "b":
+		data, err := hex.DecodeString(rawArg)
+		if err != nil {
+			// ... handle error
+			panic(err)
+		}
+		return osc.OSCArg{
+			Type:  "b",
+			Value: data,
+		}
+	default:
+		fmt.Print("unhandled osc type: ")
+		fmt.Printf("%s.\n", oscType)
+		return osc.OSCArg{}
+	}
+}
+
+func slipEncode(bytes []byte) []byte {
+	END := byte(0xc0)
+	ESC := byte(0xdb)
+	ESC_END := byte(0xdc)
+	ESC_ESC := byte(0xdd)
+
+	var encodedBytes = []byte{}
+
+	for _, byteToEncode := range bytes {
+		if byteToEncode == END {
+			encodedBytes = append(encodedBytes, ESC_END)
+		} else if byteToEncode == ESC {
+			encodedBytes = append(encodedBytes, ESC_ESC)
+		} else {
+			encodedBytes = append(encodedBytes, byteToEncode)
+		}
+	}
+
+	encodedBytes = append(encodedBytes, END)
+	return encodedBytes
+}
+
+func make(address string, args []string, types []string, slip bool) {
+
+	oscArgs := []osc.OSCArg{}
+
+	for index, arg := range args {
+		oscType := "s"
+		if len(types) > index {
+			oscType = types[index]
+		}
+
+		oscArgs = append(oscArgs, argToTypedArg(arg, oscType))
+	}
+
+	oscMessage := osc.OSCMessage{
+		Address: address,
+		Args:    oscArgs,
+	}
+
+	oscMessageBuffer := osc.ToBytes(oscMessage)
+
+	if slip {
+		oscMessageBuffer = slipEncode(oscMessageBuffer)
+	}
+
+	//TODO write buffer to stdout
+	os.Stdout.Write(oscMessageBuffer[:])
+
+}