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# -*- coding: utf-8 -*-
import vimbastructure as structs
from vimbaexception import VimbaException
from vimbadll import VimbaDLL
from ctypes import *
# class may extend a generic Vimba entity class one day...
class VimbaFeature(object):
"""
A feature of a Vimba object.
"""
@property
def name(self):
return self._name
@property
def handle(self):
return self._handle
# lookup relevant function for feature type and pass to that function
@property
def value(self):
return self._getSetTypeFuncs[self._info.featureDataType][0]()
@value.setter
def value(self, val):
self._getSetTypeFuncs[self._info.featureDataType][1](val)
@property
def range(self):
return self._rangeQueryTypeFuncs[self._info.featureDataType]()
def __init__(self, name, handle):
# set name and handle
self._name = name
self._handle = handle
# set own info
self._info = self._getInfo()
# type functions dict for looking up correct get/set function to use
self._getSetTypeFuncs = {0 : (self._notYetImplemented, self._notYetImplemented), # todo
1 : (self._getIntFeature, self._setIntFeature),
2 : (self._getFloatFeature, self._setFloatFeature),
3 : (self._getEnumFeature, self._setEnumFeature),
4 : (self._getStringFeature, self._setStringFeature),
5 : (self._getBoolFeature, self._setBoolFeature),
6 : (self._notYetImplemented, self._notYetImplemented), # todo
7 : (self._notYetImplemented, self._notYetImplemented), # todo
8 : (self._notYetImplemented, self._notYetImplemented)} # todo
# type functions dict for looking up correct range function to use
self._rangeQueryTypeFuncs = {0 : self._unknownRange,
1 : self._rangeQueryIntFeature,
2 : self._rangeQueryFloatFeature,
3 : self._unknownRange,
4 : self._unknownRange,
5 : self._unknownRange,
6 : self._unknownRange,
7 : self._unknownRange,
8 : self._unknownRange}
def getInfo(self):
"""
Get info of the feature.
:returns: VimbaFeatureInfo object -- feature information..
"""
return self._info
def _getInfo(self):
"""
Get info of the feature.
:returns: VimbaFeatureInfo object -- feature information..
"""
# args for Vimba call
featureInfo = structs.VimbaFeatureInfo()
# Vimba DLL will return an error code
errorCode = VimbaDLL.featureInfoQuery(self._handle,
self._name,
byref(featureInfo),
sizeof(featureInfo))
if errorCode != 0:
raise VimbaException(errorCode)
return featureInfo
def _notYetImplemented(self, val = None):
"""
Raises exception if feature value type is not yet defined.
"""
raise VimbaException(-1001)
def _getIntFeature(self):
"""
Get the value of an integer feature.
:returns: int -- value of the specified feature.
"""
# create args
valueToGet = c_int64()
errorCode = VimbaDLL.featureIntGet(self._handle,
self._name,
byref(valueToGet))
if errorCode != 0:
raise VimbaException(errorCode)
return valueToGet.value
def _setIntFeature(self, valueToSet):
"""
Set the value of an integer feature.
:param valueToSet: the int value to set for the feature.
"""
errorCode = VimbaDLL.featureIntSet(self._handle,
self._name,
valueToSet)
if errorCode != 0:
raise VimbaException(errorCode)
def _getFloatFeature(self):
"""
Get the value of a float feature.
:returns: float -- value of the specified feature.
"""
# create args
valueToGet = c_double()
errorCode = VimbaDLL.featureFloatGet(self._handle,
self._name,
byref(valueToGet))
if errorCode != 0:
raise VimbaException(errorCode)
return valueToGet.value
def _setFloatFeature(self, valueToSet):
"""
Set the value of a float feature.
:param valueToSet: the float value to set for the feature.
"""
errorCode = VimbaDLL.featureFloatSet(self._handle,
self._name,
valueToSet)
if errorCode != 0:
raise VimbaException(errorCode)
def _getEnumFeature(self):
"""
Get the value of an enum feature.
:returns: enum -- value of the specified feature.
"""
# create args
valueToGet = c_char_p()
errorCode = VimbaDLL.featureEnumGet(self._handle,
self._name,
byref(valueToGet))
if errorCode != 0:
raise VimbaException(errorCode)
return valueToGet.value
def _setEnumFeature(self, valueToSet):
"""
Set the value of an enum feature.
:param valueToSet: the enum value to set for the feature.
"""
errorCode = VimbaDLL.featureEnumSet(self._handle,
self._name,
valueToSet)
if errorCode != 0:
raise VimbaException(errorCode)
def _getStringFeature(self):
"""
Get the value of a string feature.
:returns: string -- value of the specified feature.
"""
# create args
bufferSize = 256
valueToGet = create_string_buffer('\000' * bufferSize)
sizeFilled = c_uint32()
errorCode = VimbaDLL.featureStringGet(self._handle,
self._name,
valueToGet,
bufferSize,
byref(sizeFilled))
if errorCode != 0:
raise VimbaException(errorCode)
return valueToGet.value
def _setStringFeature(self, valueToSet):
"""
Set the value of a string feature.
:param valueToSet: the string value to set for the feature.
"""
errorCode = VimbaDLL.featureStringSet(self._handle,
self._name,
valueToSet)
if errorCode != 0:
raise VimbaException(errorCode)
def _getBoolFeature(self):
"""
Get the value of a bool feature.
:returns: bool -- value of the specified feature.
"""
# create args
valueToGet = c_bool()
errorCode = VimbaDLL.featureBoolGet(self._handle,
self._name,
byref(valueToGet))
if errorCode != 0:
raise VimbaException(errorCode)
return valueToGet.value
def _setBoolFeature(self, valueToSet):
"""
Set the value of a bool feature.
:param valueToSet: the bool value to set for the feature.
"""
errorCode = VimbaDLL.featureBoolSet(self._handle,
self._name,
valueToSet)
if errorCode != 0:
raise VimbaException(errorCode)
def _unknownRange(self):
"""
Returns empty for ranges that have not been implemented.
"""
return ''
def _rangeQueryIntFeature(self):
"""
Get the range of an int feature.
:returns: tuple -- min and max range.
"""
# create args
minToGet = c_int64()
maxToGet = c_int64()
errorCode = VimbaDLL.featureIntRangeQuery(self._handle,
self._name,
byref(minToGet),
byref(maxToGet))
if errorCode != 0:
raise VimbaException(errorCode)
return (int(str(minToGet.value)), int(str(maxToGet.value)))
def _rangeQueryFloatFeature(self):
"""
Get the range of a float feature.
:returns: tuple -- min and max range.
"""
# create args
minToGet = c_double()
maxToGet = c_double()
errorCode = VimbaDLL.featureFloatRangeQuery(self._handle,
self._name,
byref(minToGet),
byref(maxToGet))
if errorCode != 0:
raise VimbaException(errorCode)
return (minToGet.value, maxToGet.value)
#def _rangeQueryEnumFeature(self):
# """
# Get the range of an enum feature.
#
# :returns: tuple -- min and max range.
# """
#
# # create args
# minToGet = c_uint32()
# maxToGet = c_uint32()
#
# errorCode = VimbaDLL.featureEnumRangeQuery(self._handle,
# self._name,
# byref(minToGet),
# byref(maxToGet))
# if errorCode != 0:
# raise VimbaException(errorCode)
#
# return (minToGet.value, maxToGet.value)
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