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buffer.py
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buffer.py
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# -*- coding: utf-8 -*-
"""
Created on Sun Oct 14 12:28:51 2018
@author: ajdin
"""
from collections import deque
class Buffer:
"""
Creates a dynamic buffer, that contains a variable amount of samples.
"""
MIN_SIZE = 1
def __init__(self, initlen, maxlen=None, growth_fact=1.0):
self.samples = deque(maxlen=maxlen)
self.isfull = False
self.growth = growth_fact
if initlen >= 1:
self.currentlen = initlen
else:
self.currentlen = Buffer.MIN_SIZE
def __len__(self):
return len(self.samples)
def __iter__(self):
return iter(self.samples)
def append(self, value):
self.samples.append(value)
self.isfull = False
if len(self) >= self.currentlen or len(self) >= self.samples.maxlen:
self.isfull = True
def clear(self):
self.samples.clear()
if (1.0 <= self.growth <= 2.0) and not (self.currentlen >= self.samples.maxlen):
self.currentlen *= self.growth
def add_sample(self, sample):
self.handle_full_capacity()
self.append(sample)
def handle_full_capacity(self):
if self.isfull:
self.clear()