import torch
import torch.nn as nn
import torch.nn.functional as F

class FeedForward(nn.Module):
    def __init__(self, d_model, ff_dim=2048):
        super(FeedForward, self).__init__()
        self.linear1 = nn.Linear(d_model, ff_dim)
        self.linear2 = nn.Linear(ff_dim, d_model)

    def forward(self, x):
        x = F.relu(self.linear1(x))
        x = self.linear2(x)
        return x