20 lines
752 B
Python
20 lines
752 B
Python
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# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
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"""Learned position embeddings for IndexTTS2 GPT model."""
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import torch
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import torch.nn as nn
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class LearnedPositionEmbeddings(nn.Module):
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def __init__(self, seq_len: int, model_dim: int, init: float = 0.02):
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super().__init__()
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self.emb = nn.Embedding(seq_len, model_dim)
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self.emb.weight.data.normal_(mean=0.0, std=init)
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def forward(self, x: torch.Tensor) -> torch.Tensor:
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sl = x.shape[1]
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return self.emb(torch.arange(0, sl, device=x.device))
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def get_fixed_embedding(self, ind: int, dev: torch.device) -> torch.Tensor:
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return self.emb(torch.tensor([ind], device=dev)).unsqueeze(0)
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