diff options
Diffstat (limited to 'modules/processing.py')
| -rw-r--r-- | modules/processing.py | 28 |
1 files changed, 1 insertions, 27 deletions
diff --git a/modules/processing.py b/modules/processing.py index d208a922..411c7c3f 100644 --- a/modules/processing.py +++ b/modules/processing.py @@ -915,33 +915,7 @@ def process_images_inner(p: StableDiffusionProcessing) -> Processed: if p.n_iter > 1:
shared.state.job = f"Batch {n+1} out of {p.n_iter}"
- def rescale_zero_terminal_snr_abar(alphas_cumprod):
- alphas_bar_sqrt = alphas_cumprod.sqrt()
-
- # Store old values.
- alphas_bar_sqrt_0 = alphas_bar_sqrt[0].clone()
- alphas_bar_sqrt_T = alphas_bar_sqrt[-1].clone()
-
- # Shift so the last timestep is zero.
- alphas_bar_sqrt -= (alphas_bar_sqrt_T)
-
- # Scale so the first timestep is back to the old value.
- alphas_bar_sqrt *= alphas_bar_sqrt_0 / (alphas_bar_sqrt_0 - alphas_bar_sqrt_T)
-
- # Convert alphas_bar_sqrt to betas
- alphas_bar = alphas_bar_sqrt**2 # Revert sqrt
- alphas_bar[-1] = 4.8973451890853435e-08
- return alphas_bar
-
- if hasattr(p.sd_model, 'alphas_cumprod') and hasattr(p.sd_model, 'alphas_cumprod_original'):
- p.sd_model.alphas_cumprod = p.sd_model.alphas_cumprod_original.to(shared.device)
-
- if opts.use_downcasted_alpha_bar:
- p.extra_generation_params['Downcast alphas_cumprod'] = opts.use_downcasted_alpha_bar
- p.sd_model.alphas_cumprod = p.sd_model.alphas_cumprod.half().to(shared.device)
- if opts.sd_noise_schedule == "Zero Terminal SNR":
- p.extra_generation_params['Noise Schedule'] = opts.sd_noise_schedule
- p.sd_model.alphas_cumprod = rescale_zero_terminal_snr_abar(p.sd_model.alphas_cumprod).to(shared.device)
+ sd_models.apply_alpha_schedule_override(p.sd_model, p)
with devices.without_autocast() if devices.unet_needs_upcast else devices.autocast():
samples_ddim = p.sample(conditioning=p.c, unconditional_conditioning=p.uc, seeds=p.seeds, subseeds=p.subseeds, subseed_strength=p.subseed_strength, prompts=p.prompts)
|