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common.py
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common.py
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# Copyright (c) Chris Choy (chrischoy@ai.stanford.edu).
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
# of the Software, and to permit persons to whom the Software is furnished to do
# so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
# Please cite "4D Spatio-Temporal ConvNets: Minkowski Convolutional Neural
# Networks", CVPR'19 (https://arxiv.org/abs/1904.08755) if you use any part
# of the code.
import numpy as np
import random
import time
import torch
from torch.utils.data.sampler import Sampler
class Timer(object):
"""A simple timer."""
def __init__(self):
self.reset()
def reset(self):
self.total_time = 0
self.calls = 0
self.start_time = 0
self.diff = 0
self.averate_time = 0
self.min_time = np.Inf
def tic(self):
# using time.time instead of time.clock because time time.clock
# does not normalize for multithreading
self.start_time = time.time()
def toc(self, average=False):
self.diff = time.time() - self.start_time
self.total_time += self.diff
self.calls += 1
self.average_time = self.total_time / self.calls
if self.diff < self.min_time:
self.min_time = self.diff
if average:
return self.average_time
else:
return self.diff
class InfSampler(Sampler):
"""Samples elements randomly, without replacement.
Arguments:
data_source (Dataset): dataset to sample from
"""
def __init__(self, data_source, shuffle=False):
self.data_source = data_source
self.shuffle = shuffle
self.reset_permutation()
def reset_permutation(self):
perm = len(self.data_source)
if self.shuffle:
perm = torch.randperm(perm)
else:
perm = torch.arange(perm)
self._perm = perm.tolist()
def __iter__(self):
return self
def __next__(self):
if len(self._perm) == 0:
self.reset_permutation()
return self._perm.pop()
def __len__(self):
return len(self.data_source)
def seed_all(random_seed):
torch.manual_seed(random_seed)
torch.cuda.manual_seed(random_seed)
torch.cuda.manual_seed_all(random_seed)
# torch.backends.cudnn.deterministic = True
# torch.backends.cudnn.benchmark = False
np.random.seed(random_seed)
random.seed(random_seed)