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111 lines
3.1 KiB
111 lines
3.1 KiB
import six
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import warnings
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from nd2reader.common import get_from_dict_if_exists
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def parse_if_not_none(to_check, callback):
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if to_check is not None:
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return callback()
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return None
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def parse_dimension_text_line(line):
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if six.b("Dimensions:") in line:
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entries = line.split(six.b("\r\n"))
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for entry in entries:
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if entry.startswith(six.b("Dimensions:")):
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return entry
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return None
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def parse_roi_shape(shape):
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if shape == 3:
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return 'rectangle'
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elif shape == 9:
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return 'circle'
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return None
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def parse_roi_type(type_no):
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if type_no == 4:
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return 'stimulation'
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elif type_no == 3:
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return 'reference'
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elif type_no == 2:
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return 'background'
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return None
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def get_loops_from_data(loop_data):
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# special ND experiment
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if six.b('pPeriod') not in loop_data:
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return []
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if six.b('uiPeriodCount') in loop_data and loop_data[six.b('uiPeriodCount')] > 0:
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loops = []
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for i, period in enumerate(loop_data[six.b('pPeriod')]):
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# exclude invalid periods
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if six.b('pPeriodValid') in loop_data:
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try:
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if loop_data[six.b('pPeriodValid')][i] == 1:
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loops.append(loop_data[six.b('pPeriod')][period])
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except IndexError:
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continue
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else:
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# we can't be sure, append all
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loops.append(loop_data[six.b('pPeriod')][period])
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return [loop_data]
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def guess_sampling_from_loops(duration, loop):
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""" In some cases, both keys are not saved. Then try to calculate it.
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Args:
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duration: the total duration of the loop
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loop: the raw loop data
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Returns:
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float: the guessed sampling interval in milliseconds
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"""
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number_of_loops = get_from_dict_if_exists('uiCount', loop)
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number_of_loops = number_of_loops if number_of_loops is not None and number_of_loops > 0 else 1
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interval = duration / number_of_loops
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return interval
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def determine_sampling_interval(duration, loop):
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"""Determines the loop sampling interval in milliseconds
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Args:
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duration: loop duration in milliseconds
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loop: loop dictionary
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Returns:
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float: the sampling interval in milliseconds
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"""
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interval = get_from_dict_if_exists('dPeriod', loop)
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avg_interval = get_from_dict_if_exists('dAvgPeriodDiff', loop)
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if interval is None or interval <= 0:
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interval = avg_interval
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else:
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avg_interval_set = avg_interval is not None and avg_interval > 0
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if round(avg_interval) != round(interval) and avg_interval_set:
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message = ("Reported average frame interval (%.1f ms) doesn't"
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" match the set interval (%.1f ms). Using the average"
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" now.")
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warnings.warn(message % (avg_interval, interval), RuntimeWarning)
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interval = avg_interval
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if interval is None or interval <= 0:
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# In some cases, both keys are not saved. Then try to calculate it.
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interval = guess_sampling_from_loops(duration, loop)
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return interval
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