Add outgoing audio packet interval option

main.go

@@ -11,6 +11,7 @@ import (
 	"net/http"
 	"os"
 	"strings"
+	"time"
 
 	barnlog "git.stormux.org/storm/barnard/log"
 
@@ -84,6 +85,7 @@ func main() {
 	configSet := false
 	certificateSet := false
 	buffers := flag.Int("buffers", 16, "number of audio buffers to use")
+	audioInterval := flag.Int("audio-interval", 10, "outgoing audio packet duration in ms (10, 20, 40, or 60)")
 	profile := flag.Bool("profile", false, "add http server to serve profiles")
 	noiseSuppressionEnabled := flag.Bool("noise-suppression", false, "enable noise suppression for microphone input")
 	autoTransmit := flag.Bool("auto-transmit", false, "start transmitting immediately on connect")
@@ -94,6 +96,10 @@ func main() {
 	logFile := flag.String("logfile", "", "write logs to this file (logging is disabled when omitted)")
 
 	flag.Parse()
+	selectedAudioInterval, err := audioIntervalDuration(*audioInterval)
+	if err != nil {
+		handle_raw_error(err)
+	}
 
 	// Set up logging
 	var level barnlog.Level
@@ -192,6 +198,7 @@ func main() {
 		NoiseSuppressor: noise.NewSuppressor(),
 	}
 	b.Config.Buffers = *buffers
+	b.Config.AudioInterval = selectedAudioInterval
 	b.Config.DisableUDP = *tcpOnly
 
 	b.Hotkeys = b.UserConfig.GetHotkeys()
@@ -238,6 +245,18 @@ func main() {
 	handle_error(&b)
 }
 
+// audioIntervalDuration converts the packet duration requested at startup to
+// one of the Opus durations supported by Mumble.
+func audioIntervalDuration(milliseconds int) (time.Duration, error) {
+	interval := time.Duration(milliseconds) * time.Millisecond
+	switch interval {
+	case 10 * time.Millisecond, 20 * time.Millisecond, 40 * time.Millisecond, 60 * time.Millisecond:
+		return interval, nil
+	default:
+		return 0, fmt.Errorf("audio interval must be 10, 20, 40, or 60 ms, got %d", milliseconds)
+	}
+}
+
 // serverAddress adds Mumble's default port without corrupting an IPv6 literal.
 func serverAddress(address string) string {
 	if _, port, err := net.SplitHostPort(address); err == nil && port != "" {