wehub-resource-sync
20 lines
596 B
Python
20 lines
596 B
Python
# Copyright (c) Facebook, Inc. and its affiliates.
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#
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# This source code is licensed under the MIT license found in the
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# LICENSE file in the root directory of this source tree.
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import torch.nn.functional as F
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def unfold1d(x, kernel_size, padding_l, pad_value=0):
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"""unfold T x B x C to T x B x C x K"""
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if kernel_size > 1:
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T, B, C = x.size()
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x = F.pad(
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x, (0, 0, 0, 0, padding_l, kernel_size - 1 - padding_l), value=pad_value
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)
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x = x.as_strided((T, B, C, kernel_size), (B * C, C, 1, B * C))
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else:
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x = x.unsqueeze(3)
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return x
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