jack: don't override output_ports in connect()

src/output/jack_plugin.c

@@ -213,6 +213,8 @@ mpd_jack_test_default_device(void)
 static bool
 mpd_jack_connect(struct jack_data *jd)
 {
+	const char *output_ports[2], **jports;
+
 	for (unsigned i = 0; i < G_N_ELEMENTS(jd->ringbuffer); ++i)
 		jd->ringbuffer[i] =
 			jack_ringbuffer_create(jd->ringbuffer_size);
@@ -246,8 +248,6 @@ mpd_jack_connect(struct jack_data *jd)
 	if (jd->output_ports[1] == NULL) {
 		/* no output ports were configured - ask libjack for
 		   defaults */
-		const char **jports;
-
 		jports = jack_get_ports(jd->client, NULL, NULL,
 					JackPortIsPhysical | JackPortIsInput);
 		if (jports == NULL) {
@@ -255,26 +255,38 @@ mpd_jack_connect(struct jack_data *jd)
 			return false;
 		}
 
-		jd->output_ports[0] = g_strdup(jports[0]);
-		jd->output_ports[1] = g_strdup(jports[1] != NULL
-					       ? jports[1] : jports[0]);
-		g_debug("output_ports: %s %s",
-		      jd->output_ports[0], jd->output_ports[1]);
-		free(jports);
+		output_ports[0] = jports[0];
+		output_ports[1] = jports[1] != NULL ? jports[1] : jports[0];
+
+		g_debug("output_ports: %s %s", jports[0], jports[1]);
+	} else {
+		/* use the configured output ports */
+
+		output_ports[0] = jd->output_ports[0];
+		output_ports[1] = jd->output_ports[1];
+
+		jports = NULL;
 	}
 
 	for (unsigned i = 0; i < G_N_ELEMENTS(jd->ports); ++i) {
 		int ret;
 
 		ret = jack_connect(jd->client, jack_port_name(jd->ports[i]),
-				   jd->output_ports[i]);
+				   output_ports[i]);
 		if (ret != 0) {
 			g_warning("%s is not a valid Jack Client / Port",
-				  jd->output_ports[i]);
+				  output_ports[i]);
+
+			if (jports != NULL)
+				free(jports);
+
 			return false;
 		}
 	}
 
+	if (jports != NULL)
+		free(jports);
+
 	return true;
 }