feat: add PipeWire muter functionality and service files for Sendspin audio player

internal/pipewire/output.go

@@ -56,7 +56,8 @@ func (o *Output) Open(sampleRate, channels, bitDepth int) error {
 
 func (o *Output) startUnlocked() error {
 	nameJSON, _ := json.Marshal(o.nodeName)
-	props := fmt.Sprintf(`{"node.name":%s}`, nameJSON)
+	latency := fmt.Sprintf("960/%d", o.sampleRate)
+	props := fmt.Sprintf(`{"node.name":%s,"node.latency":"%s"}`, nameJSON, latency)
 
 	args := []string{
 		"--playback",
@@ -64,6 +65,7 @@ func (o *Output) startUnlocked() error {
 		"--format", "s32",
 		"--rate", strconv.Itoa(o.sampleRate),
 		"--channels", strconv.Itoa(o.channels),
+		"--latency", latency,
 		"--properties", props,
 	}
 	if o.target != "" {