add files

funasr_local/datasets/large_datasets/datapipes/map.py

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+from torch.utils.data import IterableDataset
+
+
+def default_fn(data):
+    return data
+
+
+class MapperIterDataPipe(IterableDataset):
+
+    def __init__(self,
+                 datapipe,
+                 fn=default_fn):
+        self.datapipe = datapipe
+        self.fn = fn
+
+    def set_epoch(self, epoch):
+        self.epoch = epoch
+
+    def __iter__(self):
+        assert callable(self.fn)
+        for data in self.datapipe:
+            yield self.fn(data)