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2023-11-16 4ace5a95b052d338947fc88809a440ccd55cf6b4

 funasr/models/encoder/abs_encoder.py

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from abc import ABC
from abc import abstractmethod
from typing import Optional
from typing import Tuple

import torch


class AbsEncoder(torch.nn.Module, ABC):
    @abstractmethod
    def output_size(self) -> int:
        raise NotImplementedError

    @abstractmethod
    def forward(
        self,
        xs_pad: torch.Tensor,
        ilens: torch.Tensor,
        prev_states: torch.Tensor = None,
    ) -> Tuple[torch.Tensor, torch.Tensor, Optional[torch.Tensor]]:
        raise NotImplementedError