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import numpy as np |
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import torch |
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from typing_extensions import override |
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from comfy_api.latest import ComfyExtension, io |
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def loglinear_interp(t_steps, num_steps): |
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""" |
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Performs log-linear interpolation of a given array of decreasing numbers. |
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""" |
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xs = np.linspace(0, 1, len(t_steps)) |
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ys = np.log(t_steps[::-1]) |
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new_xs = np.linspace(0, 1, num_steps) |
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new_ys = np.interp(new_xs, xs, ys) |
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interped_ys = np.exp(new_ys)[::-1].copy() |
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return interped_ys |
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NOISE_LEVELS = {"SD1": [14.6146412293, 6.4745760956, 3.8636745985, 2.6946151520, 1.8841921177, 1.3943805092, 0.9642583904, 0.6523686016, 0.3977456272, 0.1515232662, 0.0291671582], |
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"SDXL":[14.6146412293, 6.3184485287, 3.7681790315, 2.1811480769, 1.3405244945, 0.8620721141, 0.5550693289, 0.3798540708, 0.2332364134, 0.1114188177, 0.0291671582], |
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"SVD": [700.00, 54.5, 15.886, 7.977, 4.248, 1.789, 0.981, 0.403, 0.173, 0.034, 0.002]} |
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class AlignYourStepsScheduler(io.ComfyNode): |
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@classmethod |
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def define_schema(cls) -> io.Schema: |
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return io.Schema( |
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node_id="AlignYourStepsScheduler", |
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category="sampling/custom_sampling/schedulers", |
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inputs=[ |
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io.Combo.Input("model_type", options=["SD1", "SDXL", "SVD"]), |
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io.Int.Input("steps", default=10, min=1, max=10000), |
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io.Float.Input("denoise", default=1.0, min=0.0, max=1.0, step=0.01), |
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], |
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outputs=[io.Sigmas.Output()], |
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) |
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def get_sigmas(self, model_type, steps, denoise): |
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return AlignYourStepsScheduler().execute(model_type, steps, denoise).result |
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@classmethod |
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def execute(cls, model_type, steps, denoise) -> io.NodeOutput: |
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total_steps = steps |
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if denoise < 1.0: |
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if denoise <= 0.0: |
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return io.NodeOutput(torch.FloatTensor([])) |
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total_steps = round(steps * denoise) |
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sigmas = NOISE_LEVELS[model_type][:] |
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if (steps + 1) != len(sigmas): |
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sigmas = loglinear_interp(sigmas, steps + 1) |
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sigmas = sigmas[-(total_steps + 1):] |
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sigmas[-1] = 0 |
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return io.NodeOutput(torch.FloatTensor(sigmas)) |
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class AlignYourStepsExtension(ComfyExtension): |
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@override |
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async def get_node_list(self) -> list[type[io.ComfyNode]]: |
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return [ |
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AlignYourStepsScheduler, |
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] |
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async def comfy_entrypoint() -> AlignYourStepsExtension: |
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return AlignYourStepsExtension() |
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