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