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import torch

from model.BiSeNet.build_bisenet import BiSeNet
from model.BiSeNetV2.model import BiSeNetV2


# BiSeNet model loading function
def loadBiSeNet(device: str = 'cpu') -> BiSeNet:
    """
    Load the BiSeNet model and move it to the specified device.
    
    Args:
        device (str): Device to load the model onto ('cpu' or 'cuda').
        
    Returns:
        model (BiSeNet): The loaded BiSeNet model.
    """
    model = BiSeNet(num_classes=19, context_path='resnet18').to(device)
    model.load_state_dict(torch.load('./weights/BiSeNet/weightADV.pth', map_location=device)['model_state_dict'])
    model.eval()
    
    return model


def loadBiSeNetV2(device: str = 'cpu') -> BiSeNetV2:
    """
    Load the BiSeNetV2 model and move it to the specified device.
    
    Args:
        device (str): Device to load the model onto ('cpu' or 'cuda').
        
    Returns:
        model (BiSeNetV2): The loaded BiSeNetV2 model.
    """
    model = BiSeNetV2(n_classes=19).to(device)
    model.load_state_dict(torch.load('./weights/BiSeNetV2/weightADV.pth', map_location=device)['model_state_dict'])
    model.eval()
    
    return model