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| import torch | |
| import torch.multiprocessing | |
| from torch.nn.utils.rnn import pack_padded_sequence | |
| from torch.nn.utils.rnn import pad_packed_sequence | |
| from Utility.utils import make_non_pad_mask | |
| class TinyTTS(torch.nn.Module): | |
| def __init__(self, | |
| n_mels=80, | |
| num_symbols=145, | |
| speaker_embedding_dim=192, | |
| lstm_dim=512): | |
| super().__init__() | |
| self.in_proj = torch.nn.Linear(num_symbols + speaker_embedding_dim, lstm_dim) | |
| self.rnn1 = torch.nn.LSTM(lstm_dim, lstm_dim, batch_first=True, bidirectional=True) | |
| self.rnn2 = torch.nn.LSTM(2 * lstm_dim, lstm_dim, batch_first=True, bidirectional=True) | |
| self.out_proj = torch.nn.Linear(2 * lstm_dim, n_mels) | |
| self.l1_criterion = torch.nn.L1Loss(reduction="none") | |
| self.l2_criterion = torch.nn.MSELoss(reduction="none") | |
| def forward(self, x, lens, ys): | |
| x = self.in_proj(x) | |
| x = pack_padded_sequence(x, lens.cpu(), batch_first=True, enforce_sorted=False) | |
| x, _ = self.rnn1(x) | |
| x, _ = self.rnn2(x) | |
| x, _ = pad_packed_sequence(x, batch_first=True) | |
| x = self.out_proj(x) | |
| out_masks = make_non_pad_mask(lens).unsqueeze(-1).to(ys.device) | |
| out_weights = out_masks.float() / out_masks.sum(dim=1, keepdim=True).float() | |
| out_weights /= ys.size(0) * ys.size(2) | |
| l1_loss = self.l1_criterion(x, ys).mul(out_weights).masked_select(out_masks).sum() | |
| l2_loss = self.l2_criterion(x, ys).mul(out_weights).masked_select(out_masks).sum() | |
| return l1_loss + l2_loss | |