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fix sampler device #476

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fix sampler device #476

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d72347e
fix device
continue-revolution Mar 4, 2024
420013e
fix device:
continue-revolution Mar 4, 2024
04c1370
conflict
continue-revolution Mar 4, 2024
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12 changes: 9 additions & 3 deletions ldm_patched/modules/model_sampling.py
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Original file line number Diff line number Diff line change
Expand Up @@ -74,9 +74,15 @@ def sigma_max(self):
return self.sigmas[-1]

def timestep(self, sigma):
log_sigma = sigma.log()
dists = log_sigma.to(self.log_sigmas.device) - self.log_sigmas[:, None]
return dists.abs().argmin(dim=0).view(sigma.shape).to(sigma.device)
log_sigma = sigma.log().to(self.log_sigmas.device)
dists = log_sigma - self.log_sigmas[:, None]
low_idx = dists.ge(0).cumsum(dim=0).argmax(dim=0).clamp(max=self.log_sigmas.shape[0] - 2)
high_idx = low_idx + 1
low, high = self.log_sigmas[low_idx], self.log_sigmas[high_idx]
w = (low - log_sigma) / (low - high)
w = w.clamp(0, 1)
t = (1 - w) * low_idx + w * high_idx
return t.view(sigma.shape).to(sigma.device)

def sigma(self, timestep):
t = torch.clamp(timestep.float().to(self.log_sigmas.device), min=0, max=(len(self.sigmas) - 1))
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