bool MediaNode::disconnectNode(QObject *obj)
{
MediaNode *sink = qobject_cast<MediaNode*>(obj);
if (root()) {
// Disconnecting elements while playing or paused seems to cause
// potential deadlock. Hence we force the pipeline into ready state
// before any nodes are disconnected.
gst_element_set_state(root()->pipeline(), GST_STATE_READY);
Q_ASSERT(sink->root()); //sink has to have a root since it is onnected
if (sink->description() & (AudioSink)) {
GstPad *sinkPad = gst_element_get_pad(sink->audioElement(), "sink");
// Release requested src pad from tee
GstPad *requestedPad = gst_pad_get_peer(sinkPad);
if (requestedPad) {
gst_element_release_request_pad(m_audioTee, requestedPad);
gst_object_unref(requestedPad);
}
if (GST_ELEMENT_PARENT(sink->audioElement()))
gst_bin_remove(GST_BIN(root()->audioGraph()), sink->audioElement());
gst_object_unref(sinkPad);
}
if (sink->description() & (VideoSink)) {
GstPad *sinkPad = gst_element_get_pad(sink->videoElement(), "sink");
// Release requested src pad from tee
GstPad *requestedPad = gst_pad_get_peer(sinkPad);
if (requestedPad) {
gst_element_release_request_pad(m_videoTee, requestedPad);
gst_object_unref(requestedPad);
}
if (GST_ELEMENT_PARENT(sink->videoElement()))
gst_bin_remove(GST_BIN(root()->videoGraph()), sink->videoElement());
gst_object_unref(sinkPad);
}
sink->breakGraph();
sink->setRoot(0);
}
m_videoSinkList.removeAll(obj);
m_audioSinkList.removeAll(obj);
if (sink->m_description & AudioSink) {
// Remove sink from graph
MediaNodeEvent event(MediaNodeEvent::AudioSinkRemoved, sink);
mediaNodeEvent(&event);
return true;
}
if ((m_description & VideoSource) && (sink->m_description & VideoSink)) {
// Remove sink from graph
MediaNodeEvent event(MediaNodeEvent::VideoSinkRemoved, sink);
mediaNodeEvent(&event);
return true;
}
return false;
}
/**
* Disconnects children recursively
*/
bool MediaNode::breakGraph()
{
for (int i=0; i<m_audioSinkList.size(); ++i) {
MediaNode *node = qobject_cast<MediaNode*>(m_audioSinkList[i]);
if (!node || !node->breakGraph())
return false;
node->setRoot(0);
}
for (int i=0; i <m_videoSinkList.size(); ++i) {
MediaNode *node = qobject_cast<MediaNode*>(m_videoSinkList[i]);
if (!node || !node->breakGraph())
return false;
node->setRoot(0);
}
unlink();
return true;
}