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35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import platform
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import multiprocessing as mp
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def is_pic(img_name):
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valid_suffix = ['JPEG', 'jpeg', 'JPG', 'jpg', 'BMP', 'bmp', 'PNG', 'png']
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suffix = img_name.split('.')[-1]
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if suffix not in valid_suffix:
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return False
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return True
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def get_num_workers(num_workers):
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if not platform.system() == 'Linux':
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# Dataloader with multi-process model is not supported
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# on MacOS and Windows currently.
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return 0
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if num_workers == 'auto':
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num_workers = mp.cpu_count() // 2 if mp.cpu_count() // 2 < 2 else 2
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return num_workers
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