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import six
import struct
import re
class LabelMap(object):
"""
Contains pointers to metadata. This might only be valid for V3 files.
"""
def __init__(self, raw_binary_data):
self._data = raw_binary_data
self._image_data = {}
def image_attributes(self):
return self._get_location(six.b("ImageAttributesLV!"))
def _get_location(self, label):
try:
label_location = self._data.index(label) + len(label)
return self._parse_data_location(label_location)
except ValueError:
return None
def _parse_data_location(self, label_location):
location, length = struct.unpack("QQ", self._data[label_location: label_location + 16])
return location
@property
def image_text_info(self):
return self._get_location(six.b("ImageTextInfoLV!"))
@property
def image_metadata(self):
return self._get_location(six.b("ImageMetadataLV!"))
@property
def image_metadata_sequence(self):
# there is always only one of these, even though it has a pipe followed by a zero, which is how they do indexes
return self._get_location(six.b("ImageMetadataSeqLV|0!"))
def get_image_data_location(self, index):
if not self._image_data:
regex = re.compile(six.b("""ImageDataSeq\|(\d+)!"""))
for match in regex.finditer(self._data):
if match:
location = self._parse_data_location(match.end())
self._image_data[int(match.group(1))] = location
return self._image_data[index]
@property
def image_calibration(self):
return self._get_location(six.b("ImageCalibrationLV|0!"))
@property
def image_attributes(self):
return self._get_location(six.b("ImageAttributesLV!"))
@property
def x_data(self):
return self._get_location(six.b("CustomData|X!"))
@property
def y_data(self):
return self._get_location(six.b("CustomData|Y!"))
@property
def z_data(self):
return self._get_location(six.b("CustomData|Z!"))
@property
def roi_metadata(self):
return self._get_location(six.b("CustomData|RoiMetadata_v1!"))
@property
def pfs_status(self):
return self._get_location(six.b("CustomData|PFS_STATUS!"))
@property
def pfs_offset(self):
return self._get_location(six.b("CustomData|PFS_OFFSET!"))
@property
def guid(self):
return self._get_location(six.b("CustomData|GUIDStore!"))
@property
def description(self):
return self._get_location(six.b("CustomData|CustomDescriptionV1_0!"))
@property
def camera_exposure_time(self):
return self._get_location(six.b("CustomData|Camera_ExposureTime1!"))
@property
def camera_temp(self):
return self._get_location(six.b("CustomData|CameraTemp1!"))
@property
def acquisition_times(self):
return self._get_location(six.b("CustomData|AcqTimesCache!"))
@property
def acquisition_times_2(self):
return self._get_location(six.b("CustomData|AcqTimes2Cache!"))
@property
def acquisition_frames(self):
return self._get_location(six.b("CustomData|AcqFramesCache!"))
@property
def lut_data(self):
return self._get_location(six.b("CustomDataVar|LUTDataV1_0!"))
@property
def grabber_settings(self):
return self._get_location(six.b("CustomDataVar|GrabberCameraSettingsV1_0!"))
@property
def custom_data(self):
return self._get_location(six.b("CustomDataVar|CustomDataV2_0!"))
@property
def app_info(self):
return self._get_location(six.b("CustomDataVar|AppInfo_V1_0!"))