From 55b45487c75e683cafe63dba29e32be8243b6cc7 Mon Sep 17 00:00:00 2001
From: jmwang66 <wangjiaming.wjm@alibaba-inc.com>
Date: 星期一, 06 二月 2023 16:59:00 +0800
Subject: [PATCH] update data2vec pretrain: dataset
---
funasr/datasets/collate_fn.py | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 52 insertions(+), 0 deletions(-)
diff --git a/funasr/datasets/collate_fn.py b/funasr/datasets/collate_fn.py
index d52032f..d34d610 100644
--- a/funasr/datasets/collate_fn.py
+++ b/funasr/datasets/collate_fn.py
@@ -80,4 +80,56 @@
output = (uttids, output)
assert check_return_type(output)
+ return output
+
+def crop_to_max_size(feature, target_size):
+ size = len(feature)
+ diff = size - target_size
+ if diff <= 0:
+ return feature
+
+ start = np.random.randint(0, diff + 1)
+ end = size - diff + start
+ return feature[start:end]
+
+
+def clipping_collate_fn(
+ data: Collection[Tuple[str, Dict[str, np.ndarray]]],
+ max_sample_size=None,
+ not_sequence: Collection[str] = (),
+) -> Tuple[List[str], Dict[str, torch.Tensor]]:
+ # mainly for pre-training
+ assert check_argument_types()
+ uttids = [u for u, _ in data]
+ data = [d for _, d in data]
+
+ assert all(set(data[0]) == set(d) for d in data), "dict-keys mismatching"
+ assert all(
+ not k.endswith("_lengths") for k in data[0]
+ ), f"*_lengths is reserved: {list(data[0])}"
+
+ output = {}
+ for key in data[0]:
+ array_list = [d[key] for d in data]
+ tensor_list = [torch.from_numpy(a) for a in array_list]
+ sizes = [len(s) for s in tensor_list]
+ if max_sample_size is None:
+ target_size = min(sizes)
+ else:
+ target_size = min(min(sizes), max_sample_size)
+ tensor = tensor_list[0].new_zeros(len(tensor_list), target_size, tensor_list[0].shape[1])
+ for i, (source, size) in enumerate(zip(tensor_list, sizes)):
+ diff = size - target_size
+ if diff == 0:
+ tensor[i] = source
+ else:
+ tensor[i] = crop_to_max_size(source, target_size)
+ output[key] = tensor
+
+ if key not in not_sequence:
+ lens = torch.tensor([source.shape[0] for source in tensor], dtype=torch.long)
+ output[key + "_lengths"] = lens
+
+ output = (uttids, output)
+ assert check_return_type(output)
return output
\ No newline at end of file
--
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