allow passing port, latency via cmdline

main.go

@@ -1,29 +1,34 @@
 package main
 
 import (
+	"flag"
 	"log"
+	"strconv"
 
 	"github.com/haivision/srtgo"
 	"github.com/voc/srtrelay/server"
 )
 
 func main() {
+	var port = flag.Int("port", 1337, "relay port (default 1337)")
+	var latency = flag.Int("latency", 300, "srt latency in ms (default 300)")
+	flag.Parse()
+
 	options := make(map[string]string)
 	options["blocking"] = "0"
 	options["transtype"] = "live"
-	options["latency"] = "300"
+	options["latency"] = strconv.Itoa(*latency)
 
 	address := "0.0.0.0"
-	port := uint16(8090)
 	buffersize := uint(384000) // 1s @ 3Mbits/
 
-	sck := srtgo.NewSrtSocket(address, port, options)
+	sck := srtgo.NewSrtSocket(address, uint16(*port), options)
 	err := sck.Listen(1)
 	defer sck.Close()
 	if err != nil {
 		log.Fatalln("listen failed", err)
 	}
-	log.Printf("Listening on %s:%d\n", address, port)
+	log.Printf("Listening on %s:%d\n", address, *port)
 
 	server := server.NewServer(buffersize)
 	for {