101 lines
3.1 KiB
Python
101 lines
3.1 KiB
Python
import comfy.supported_models_base
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import comfy.latent_formats
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import comfy.model_patcher
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import comfy.model_base
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import comfy.utils
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import comfy.conds
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import torch
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import math
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from comfy import model_management
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from comfy.latent_formats import LatentFormat
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from .diffusers_convert import convert_state_dict
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class SanaLatent(LatentFormat):
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latent_channels = 32
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def __init__(self):
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self.scale_factor = 0.41407
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class EXM_Sana(comfy.supported_models_base.BASE):
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unet_config = {}
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unet_extra_config = {}
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latent_format = SanaLatent
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def __init__(self, model_conf):
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self.model_target = model_conf.get("target")
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self.unet_config = model_conf.get("unet_config", {})
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self.sampling_settings = model_conf.get("sampling_settings", {})
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self.latent_format = self.latent_format()
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# UNET is handled by extension
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self.unet_config["disable_unet_model_creation"] = True
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def model_type(self, state_dict, prefix=""):
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return comfy.model_base.ModelType.FLOW
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class EXM_Sana_Model(comfy.model_base.BaseModel):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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def extra_conds(self, **kwargs):
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out = super().extra_conds(**kwargs)
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cn_hint = kwargs.get("cn_hint", None)
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if cn_hint is not None:
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out["cn_hint"] = comfy.conds.CONDRegular(cn_hint)
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return out
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def load_sana(model_path, model_conf):
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state_dict = comfy.utils.load_torch_file(model_path)
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state_dict = state_dict.get("model", state_dict)
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# prefix
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for prefix in ["model.diffusion_model.",]:
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if any(True for x in state_dict if x.startswith(prefix)):
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state_dict = {k[len(prefix):]:v for k,v in state_dict.items()}
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# diffusers
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if "adaln_single.linear.weight" in state_dict:
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state_dict = convert_state_dict(state_dict) # Diffusers
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parameters = comfy.utils.calculate_parameters(state_dict)
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unet_dtype = comfy.model_management.unet_dtype()
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load_device = comfy.model_management.get_torch_device()
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offload_device = comfy.model_management.unet_offload_device()
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# ignore fp8/etc and use directly for now
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manual_cast_dtype = model_management.unet_manual_cast(unet_dtype, load_device)
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if manual_cast_dtype:
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print(f"Sana: falling back to {manual_cast_dtype}")
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unet_dtype = manual_cast_dtype
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model_conf = EXM_Sana(model_conf) # convert to object
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model = EXM_Sana_Model( # same as comfy.model_base.BaseModel
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model_conf,
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model_type=comfy.model_base.ModelType.FLOW,
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device=model_management.get_torch_device()
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)
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if model_conf.model_target == "SanaMS":
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from .models.sana_multi_scale import SanaMS
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model.diffusion_model = SanaMS(**model_conf.unet_config)
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else:
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raise NotImplementedError(f"Unknown model target '{model_conf.model_target}'")
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m, u = model.diffusion_model.load_state_dict(state_dict, strict=False)
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if len(m) > 0: print("Missing UNET keys", m)
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if len(u) > 0: print("Leftover UNET keys", u)
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model.diffusion_model.dtype = unet_dtype
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model.diffusion_model.eval()
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model.diffusion_model.to(unet_dtype)
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model_patcher = comfy.model_patcher.ModelPatcher(
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model,
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load_device = load_device,
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offload_device = offload_device,
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)
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return model_patcher
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