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Bug fix: use the correct registered buffer #744

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Bug fix: use the correct registered buffer #744

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4 changes: 2 additions & 2 deletions ldm/models/diffusion/ddim.py
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Original file line number Diff line number Diff line change
Expand Up @@ -184,7 +184,7 @@ def p_sample_ddim(self, x, c, t, index, repeat_noise=False, use_original_steps=F
alphas = self.model.alphas_cumprod if use_original_steps else self.ddim_alphas
alphas_prev = self.model.alphas_cumprod_prev if use_original_steps else self.ddim_alphas_prev
sqrt_one_minus_alphas = self.model.sqrt_one_minus_alphas_cumprod if use_original_steps else self.ddim_sqrt_one_minus_alphas
sigmas = self.model.ddim_sigmas_for_original_num_steps if use_original_steps else self.ddim_sigmas
sigmas = self.ddim_sigmas_for_original_num_steps if use_original_steps else self.ddim_sigmas
# select parameters corresponding to the currently considered timestep
a_t = torch.full((b, 1, 1, 1), alphas[index], device=device)
a_prev = torch.full((b, 1, 1, 1), alphas_prev[index], device=device)
Expand Down Expand Up @@ -238,4 +238,4 @@ def decode(self, x_latent, cond, t_start, unconditional_guidance_scale=1.0, unco
x_dec, _ = self.p_sample_ddim(x_dec, cond, ts, index=index, use_original_steps=use_original_steps,
unconditional_guidance_scale=unconditional_guidance_scale,
unconditional_conditioning=unconditional_conditioning)
return x_dec
return x_dec
2 changes: 1 addition & 1 deletion ldm/models/diffusion/plms.py
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Expand Up @@ -194,7 +194,7 @@ def get_model_output(x, t):
alphas = self.model.alphas_cumprod if use_original_steps else self.ddim_alphas
alphas_prev = self.model.alphas_cumprod_prev if use_original_steps else self.ddim_alphas_prev
sqrt_one_minus_alphas = self.model.sqrt_one_minus_alphas_cumprod if use_original_steps else self.ddim_sqrt_one_minus_alphas
sigmas = self.model.ddim_sigmas_for_original_num_steps if use_original_steps else self.ddim_sigmas
sigmas = self.ddim_sigmas_for_original_num_steps if use_original_steps else self.ddim_sigmas

def get_x_prev_and_pred_x0(e_t, index):
# select parameters corresponding to the currently considered timestep
Expand Down