Source code for obspy.realtime.rtmemory

# -*- coding: utf-8 -*-
"""
Module for handling ObsPy RtMemory objects.

:copyright:
    The ObsPy Development Team (devs@obspy.org) & Anthony Lomax
:license:
    GNU Lesser General Public License, Version 3
    (https://www.gnu.org/copyleft/lesser.html)
"""
import numpy as np


[docs] class RtMemory: """ Real time memory class. """
[docs] def __init__(self): self.initialized = False
[docs] def initialize(self, data_type, length_input, length_output, input_initial_value=0, output_initial_value=0): """ Create and initialize input and output arrays for this RtMemory object. :type data_type: numpy.dtype :param data_type: Desired array data-type. :type length_input: int :param length_input: length of the input memory array. :type length_output: int :param length_output: length of the output memory array. :type input_initial_value: float, optional :param input_initial_value: Initialization value for the input memory array (default is 1.0). :type output_initial_value: float, optional :param output_initial_value: Initialization value for the output memory array (default is 1.0). """ self.input = np.empty(length_input, data_type) self.input.fill(input_initial_value) self.output = np.empty(length_output, data_type) self.output.fill(output_initial_value) self.initialized = True
[docs] def _update(self, memory_array, data): """ Update specified memory array using specified number of points from end of specified data array. :type memory_array: numpy.ndarray :param memory_array: Memory array (input or output) in this RtMemory object to update. :type data: numpy.ndarray :param data: Data array to use for update. :return: NumPy :class:`~numpy.ndarray` object containing updated memory array (input or output). """ if data.size >= np.size(memory_array): # data length greater than or equal to memory length memory_array = data[np.size(data) - np.size(memory_array):] else: # data length less than memory length # shift memory memory_array = memory_array[data.size:] # append data memory_array = np.concatenate((memory_array, data)) return memory_array
[docs] def update_output(self, data): """ Update output memory using specified number of points from end of specified array. :type data: numpy.ndarray :param data: Data array to use for update. """ self.output = self._update(self.output, data)
[docs] def update_input(self, data): """ Update input memory using specified number of points from end of specified array. :type data: numpy.ndarray :param data: Data array to use for update. """ self.input = self._update(self.input, data)