import torch
import torch.nn as nn

class PadCrop(nn.Module):
    def __init__(self, crop_size=None, pad_mode='constant', pad_value=0):
        super().__init__()
        self.crop_size = crop_size
        self.pad_mode = pad_mode
        self.pad_value = pad_value
    
    def forward(self, x):
        # Simple implementation - you can customize this
        if self.crop_size:
            return x[:, :, :self.crop_size]
        return x

# Export PadCrop
__all__ = ['PadCrop']