* Adds a listener for the <code>need-data</code> signal
*
* @param listener Listener to be called when appsrc needs data.
*/
public void connect(final NEED_DATA listener) {
connect(NEED_DATA.class, listener, new GstCallback() {
@SuppressWarnings("unused")
public void callback(AppSrc elem, int size) {
listener.needData(elem, size);
}
});