def _getFeatureInfos(self):
"""
Gets feature info of all available features. Will
cause error if object/camera is not opened.
:returns: list -- feature info for available features.
"""
# check it's populated as can't populate it in __init__
if self._featureInfos is None:
# args
dummyFeatureInfo = structs.VimbaFeatureInfo()
numFound = c_uint32(-1)
# call once to get number of available features
# Vimba DLL will return an error code
errorCode = VimbaDLL.featuresList(self._handle,
byref(dummyFeatureInfo),
0,
byref(numFound),
sizeof(dummyFeatureInfo))
if errorCode != 0:
raise VimbaException(errorCode)
# number of features specified by Vimba
numFeatures = numFound.value
# args
featureInfoArray = (structs.VimbaFeatureInfo * numFeatures)()
# call again to get the features
# Vimba DLL will return an error code
errorCode = VimbaDLL.featuresList(self._handle,
featureInfoArray,
numFeatures,
byref(numFound),
sizeof(dummyFeatureInfo))
if errorCode != 0:
raise VimbaException(errorCode)
self._featureInfos = list(
featInfo for featInfo in featureInfoArray)
return self._featureInfos
