send dbus signal with interface name

1 files changed, 33 insertions, 0 deletions

diff --git a/module-volume-change-notify.c b/module-volume-change-notify.c
index 6032d17..b45e27e 100644
--- a/module-volume-change-notify.c
+++ b/module-volume-change-notify.c
@@ -41,6 +41,35 @@ struct userdata {
     DBusConnection *dbus_connection;
 };
 
+void send_dbus_signal(const char *name, const pa_cvolume *vol,
+                      const struct userdata *u)
+{
+    DBusMessage* msg;
+    DBusMessageIter args;
+
+    /* create a signal and check for errors */
+    msg = dbus_message_new_signal("/org/PulseAudio/VolumeNotification",
+                                  "org.PulseAudio.VolumeNotification",
+                                  "VolumeChange");
+    if (!msg)
+        return;
+
+    /* append arguments onto signal */
+    dbus_message_iter_init_append(msg, &args);
+    if (!dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING, &name))
+        goto fail;
+
+    /* send the message and flush the connection */
+    if (!dbus_connection_send(u->dbus_connection, msg, NULL))
+        goto fail;
+
+    dbus_connection_flush(u->dbus_connection);
+
+fail:
+    /* free the message */
+    dbus_message_unref(msg);
+}
+
 void sink_change_event_cb(pa_core *c, pa_subscription_event_type_t t,
                           uint32_t idx, void *userdata)
 {
@@ -49,10 +78,14 @@ void sink_change_event_cb(pa_core *c, pa_subscription_event_type_t t,
     if (PA_SUBSCRIPTION_EVENT_CHANGE & t == 0)
         return;
 
+    if (!userdata)
+        return;
+
     s = pa_idxset_get_by_index(c->sinks, idx);
     if (!s)
         return;
 
+    send_dbus_signal(s->name, &s->reference_volume, userdata);
 }
 
 void pa__done(pa_module *m)