jcm/sampling.py [306:326]:
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    def __init__(self, sde, score_fn, snr, n_steps):
        super().__init__(sde, score_fn, snr, n_steps)
        if (
            not isinstance(sde, sde_lib.VPSDE)
            and not isinstance(sde, sde_lib.VESDE)
            and not isinstance(sde, sde_lib.subVPSDE)
        ):
            raise NotImplementedError(
                f"SDE class {sde.__class__.__name__} not yet supported."
            )

    def update_fn(self, rng, x, t):
        sde = self.sde
        score_fn = self.score_fn
        n_steps = self.n_steps
        target_snr = self.snr
        if isinstance(sde, sde_lib.VPSDE) or isinstance(sde, sde_lib.subVPSDE):
            timestep = (t * (sde.N - 1) / sde.T).astype(jnp.int32)
            alpha = sde.alphas[timestep]
        else:
            alpha = jnp.ones_like(t)
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jcm/sampling.py [357:377]:
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    def __init__(self, sde, score_fn, snr, n_steps):
        super().__init__(sde, score_fn, snr, n_steps)
        if (
            not isinstance(sde, sde_lib.VPSDE)
            and not isinstance(sde, sde_lib.VESDE)
            and not isinstance(sde, sde_lib.subVPSDE)
        ):
            raise NotImplementedError(
                f"SDE class {sde.__class__.__name__} not yet supported."
            )

    def update_fn(self, rng, x, t):
        sde = self.sde
        score_fn = self.score_fn
        n_steps = self.n_steps
        target_snr = self.snr
        if isinstance(sde, sde_lib.VPSDE) or isinstance(sde, sde_lib.subVPSDE):
            timestep = (t * (sde.N - 1) / sde.T).astype(jnp.int32)
            alpha = sde.alphas[timestep]
        else:
            alpha = jnp.ones_like(t)
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