Source code for blue_st_sdk.utils.unwrap_timestamp

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"""unwrap_timestamp

The unwrap_timestamp module contains tools to unwrap timestamp values.
"""


# IMPORT

from blue_st_sdk.utils.python_utils import synchronized


# CLASSES

[docs]class UnwrapTimestamp(object): """Class that unwraps a timestamp.""" _NEAR_TO_END_TH = (1 << 16) - 100 """Threshold."""
[docs] def __init__(self): """Constructor.""" # Number of times the timestamp has reset. # The timestamp is reset whenever the received timestamp has a value # greater than "2^16 - 100" and it is followed by a package with a # smaller value. self._reset_times = 0 # Last raw timestamp received. # It is a number between "0" and "2^16-1".
self._last_timestamp = 0
[docs] @synchronized def unwrap(self, timestamp): """Add a multiple of (1 << 16) to the timestamp to reset it, if needed. Args: timestamp (int): Timestamp. Returns: int: The unwrapped timestamp. """ if self._last_timestamp > self._NEAR_TO_END_TH \ and self._last_timestamp > timestamp: self._reset_times += 1 self._last_timestamp = timestamp #return long(self._reset_times) * (1 << 16) + long(timestamp) #Python 2
return int(self._reset_times) * (1 << 16) + int(timestamp) #Python 3