def getNodeList(cls):
'''
Get available node list.
'''
maxCnt = 16
nodeList = fg.new_FGNodeInfoArray(maxCnt)
ret, cnt = fg.FGGetNodeList(nodeList, maxCnt)
if ret != fg.FCE_NOERROR:
raise AVTCameraError(ret)
return tuple(
fg.FGNodeInfoArray_getitem(nodeList, i) for i in xrange(cnt))
