nodes/Extraltodeus-DistanceSampler
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Minor cleanups for ancestral support

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blepping
2025-06-17 00:37:34 -06:00
parent 45a0a0ee40
commit 2ad92d1fa7
1 changed files with 4 additions and 5 deletions
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custom_samplers.py
+4 -5
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@@ -82,7 +82,6 @@ def get_ancestral_step_ext(sigma, sigma_next, eta=1.0, is_rf=False):
sigma_down = sigma_next * downstep_ratio sigma_down = sigma_next * downstep_ratio
alpha_ip1, alpha_down = 1.0 - sigma_next, 1.0 - sigma_down alpha_ip1, alpha_down = 1.0 - sigma_next, 1.0 - sigma_down
sigma_up = (sigma_next**2 - sigma_down**2 * alpha_ip1**2 / alpha_down**2)**0.5 sigma_up = (sigma_next**2 - sigma_down**2 * alpha_ip1**2 / alpha_down**2)**0.5
sigma_down_i_ratio = sigma_down / sigma
x_coeff = alpha_ip1 / alpha_down x_coeff = alpha_ip1 / alpha_down
return sigma_down, sigma_up, x_coeff return sigma_down, sigma_up, x_coeff
@@ -91,10 +90,10 @@ def internal_step(x, d, dt, sigma, sigma_next, sigma_up, x_coeff, noise_sampler)
if sigma_up == 0 or noise_sampler is None: if sigma_up == 0 or noise_sampler is None:
return x return x
noise = noise_sampler(sigma, sigma_next).mul_(sigma_up) noise = noise_sampler(sigma, sigma_next).mul_(sigma_up)
if x_coeff == 1: if x_coeff != 1:
# Non-flow path. # x gets scaled for flow models.
return x.add_(noise) x *= x_coeff
return x.mul_(x_coeff).add_(noise) return x.add_(noise)
def fix_step_range(steps, start, end): def fix_step_range(steps, start, end):
if start < 0: if start < 0: