r computing the prompt embeddings.    Encodes the prompt into text encoder hidden states.  forward_loop  < source > ( x_t0 t0 t1 generator  ) → x_t1  Parameters   generator (torch.Generator or List[torch.Generator], optional) —
A torch.Generator to make
generation deterministic.   Returns 
x_t1
  
Forward process applied to x_t0 from time t0 to t1.
  Perform DDPM forward process from time t0 to t1. This is the same as adding noise with correspo