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- # Copyright (c) 2024 PaddlePaddle Authors. All Rights Reserved.
- #
- # Licensed under the Apache License, Version 2.0 (the "License");
- # you may not use this file except in compliance with the License.
- # You may obtain a copy of the License at
- #
- # http://www.apache.org/licenses/LICENSE-2.0
- #
- # Unless required by applicable law or agreed to in writing, software
- # distributed under the License is distributed on an "AS IS" BASIS,
- # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- # See the License for the specific language governing permissions and
- # limitations under the License.
- import platform
- import multiprocessing as mp
- def is_pic(img_name):
- valid_suffix = ["JPEG", "jpeg", "JPG", "jpg", "BMP", "bmp", "PNG", "png"]
- suffix = img_name.split(".")[-1]
- if suffix not in valid_suffix:
- return False
- return True
- def get_num_workers(num_workers):
- if not platform.system() == "Linux":
- # Dataloader with multi-process model is not supported
- # on MacOS and Windows currently.
- return 0
- if num_workers == "auto":
- num_workers = mp.cpu_count() // 2 if mp.cpu_count() // 2 < 2 else 2
- return num_workers
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