84 lines
3.0 KiB
Python
84 lines
3.0 KiB
Python
#Taken from: https://github.com/tfernd/HyperTile/
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import math
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from einops import rearrange
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# Use torch rng for consistency across generations
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from torch import randint
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def random_divisor(value: int, min_value: int, /, max_options: int = 1) -> int:
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min_value = min(min_value, value)
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# All big divisors of value (inclusive)
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divisors = [i for i in range(min_value, value + 1) if value % i == 0]
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ns = [value // i for i in divisors[:max_options]] # has at least 1 element
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if len(ns) - 1 > 0:
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idx = randint(low=0, high=len(ns) - 1, size=(1,)).item()
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else:
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idx = 0
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return ns[idx]
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class HyperTile:
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@classmethod
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def INPUT_TYPES(s):
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return {"required": { "model": ("MODEL",),
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"tile_size": ("INT", {"default": 256, "min": 1, "max": 2048}),
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"swap_size": ("INT", {"default": 2, "min": 1, "max": 128}),
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"max_depth": ("INT", {"default": 0, "min": 0, "max": 10}),
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"scale_depth": ("BOOLEAN", {"default": False}),
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}}
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RETURN_TYPES = ("MODEL",)
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FUNCTION = "patch"
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CATEGORY = "model_patches/unet"
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def patch(self, model, tile_size, swap_size, max_depth, scale_depth):
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model_channels = model.model.model_config.unet_config["model_channels"]
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latent_tile_size = max(32, tile_size) // 8
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self.temp = None
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def hypertile_in(q, k, v, extra_options):
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model_chans = q.shape[-2]
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orig_shape = extra_options['original_shape']
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apply_to = []
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for i in range(max_depth + 1):
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apply_to.append((orig_shape[-2] / (2 ** i)) * (orig_shape[-1] / (2 ** i)))
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if model_chans in apply_to:
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shape = extra_options["original_shape"]
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aspect_ratio = shape[-1] / shape[-2]
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hw = q.size(1)
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h, w = round(math.sqrt(hw * aspect_ratio)), round(math.sqrt(hw / aspect_ratio))
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factor = (2 ** apply_to.index(model_chans)) if scale_depth else 1
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nh = random_divisor(h, latent_tile_size * factor, swap_size)
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nw = random_divisor(w, latent_tile_size * factor, swap_size)
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if nh * nw > 1:
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q = rearrange(q, "b (nh h nw w) c -> (b nh nw) (h w) c", h=h // nh, w=w // nw, nh=nh, nw=nw)
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self.temp = (nh, nw, h, w)
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return q, k, v
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return q, k, v
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def hypertile_out(out, extra_options):
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if self.temp is not None:
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nh, nw, h, w = self.temp
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self.temp = None
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out = rearrange(out, "(b nh nw) hw c -> b nh nw hw c", nh=nh, nw=nw)
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out = rearrange(out, "b nh nw (h w) c -> b (nh h nw w) c", h=h // nh, w=w // nw)
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return out
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m = model.clone()
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m.set_model_attn1_patch(hypertile_in)
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m.set_model_attn1_output_patch(hypertile_out)
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return (m, )
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NODE_CLASS_MAPPINGS = {
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"HyperTile": HyperTile,
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}
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