audio/jack: simplify the re-init code path

Instead of checking for the audodev state in each code path, centralize
the check into the initialize function itself to make it safe to call it
at any time.

Signed-off-by: Geoffrey McRae <geoff@hostfission.com>
Message-id: 20200613040518.38172-7-geoff@hostfission.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

audio/jackaudio.c

@@ -395,6 +395,10 @@ static int qjack_client_init(QJackClient *c)
     char client_name[jack_client_name_size()];
     jack_options_t options = JackNullOption;
 
+    if (c->state == QJACK_STATE_RUNNING) {
+        return 0;
+    }
+
     c->connect_ports = true;
 
     snprintf(client_name, sizeof(client_name), "%s-%s",
@@ -485,9 +489,7 @@ static int qjack_init_out(HWVoiceOut *hw, struct audsettings *as,
     QJackOut *jo  = (QJackOut *)hw;
     Audiodev *dev = (Audiodev *)drv_opaque;
 
-    if (jo->c.state != QJACK_STATE_DISCONNECTED) {
-        return 0;
-    }
+    qjack_client_fini(&jo->c);
 
     jo->c.out       = true;
     jo->c.enabled   = false;
@@ -523,9 +525,7 @@ static int qjack_init_in(HWVoiceIn *hw, struct audsettings *as,
     QJackIn  *ji  = (QJackIn *)hw;
     Audiodev *dev = (Audiodev *)drv_opaque;
 
-    if (ji->c.state != QJACK_STATE_DISCONNECTED) {
-        return 0;
-    }
+    qjack_client_fini(&ji->c);
 
     ji->c.out       = false;
     ji->c.enabled   = false;