espnet2.gan_tts.vits.flow.FlipFlow

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class espnet2.gan_tts.vits.flow.FlipFlow(*args, **kwargs)

Bases: Module

Flip flow module.

Initialize internal Module state, shared by both nn.Module and ScriptModule.

forward(x: Tensor, *args, inverse: bool = False, **kwargs) → Tensor | Tuple[Tensor, Tensor]

Calculate forward propagation.

• Parameters:
  • x (Tensor) – Input tensor (B, channels, T).
  • inverse (bool) – Whether to inverse the flow.
• Returns: Flipped tensor (B, channels, T). Tensor: Log-determinant tensor for NLL (B,) if not inverse.
• Return type: Tensor