Initial snapshot: hand motion pipeline (Dyn-HaMR + dex-retargeting + SPIDER)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

third_party/hamer/third-party/ViTPose/mmpose/datasets/dataset_wrappers.py

@@ -0,0 +1,31 @@
+# Copyright (c) OpenMMLab. All rights reserved.
+from .builder import DATASETS
+
+
+@DATASETS.register_module()
+class RepeatDataset:
+    """A wrapper of repeated dataset.
+
+    The length of repeated dataset will be `times` larger than the original
+    dataset. This is useful when the data loading time is long but the dataset
+    is small. Using RepeatDataset can reduce the data loading time between
+    epochs.
+
+    Args:
+        dataset (:obj:`Dataset`): The dataset to be repeated.
+        times (int): Repeat times.
+    """
+
+    def __init__(self, dataset, times):
+        self.dataset = dataset
+        self.times = times
+
+        self._ori_len = len(self.dataset)
+
+    def __getitem__(self, idx):
+        """Get data."""
+        return self.dataset[idx % self._ori_len]
+
+    def __len__(self):
+        """Length after repetition."""
+        return self.times * self._ori_len