Message.parseStateChanged

void parseStateChanged(out gst.types.State oldstate, out gst.types.State newstate, out gst.types.State pending)

Extracts the old and new states from the GstMessage.

Typical usage of this function might be:

...
 switch (GST_MESSAGE_TYPE (msg)) {
   case GST_MESSAGE_STATE_CHANGED: {
     GstState old_state, new_state;

     gst_message_parse_state_changed (msg, &old_state, &new_state, NULL);
     g_print ("Element %s changed state from %s to %s.\n",
         GST_OBJECT_NAME (msg->src),
         gst_element_state_get_name (old_state),
         gst_element_state_get_name (new_state));
     break;
   }
   ...
 }
 ...

MT safe.

Parameters

`oldstate`	the previous state, or null
`newstate`	the new (current) state, or null
`pending`	the pending (target) state, or null