100 lines
3.2 KiB
Python
100 lines
3.2 KiB
Python
import logging
|
|
|
|
import comfy.utils
|
|
import comfy.model_base
|
|
import comfy.model_detection
|
|
|
|
import comfy.supported_models_base
|
|
import comfy.supported_models
|
|
import comfy.latent_formats
|
|
|
|
from .models.sana import Sana
|
|
from .models.sana_multi_scale import SanaMS
|
|
from .diffusers_convert import convert_state_dict
|
|
from ..utils.loader import load_state_dict_from_config
|
|
|
|
class SanaLatent(comfy.latent_formats.LatentFormat):
|
|
scale_factor = 0.41407
|
|
latent_channels = 32
|
|
|
|
class SanaConfig(comfy.supported_models_base.BASE):
|
|
unet_class = SanaMS
|
|
unet_config = {}
|
|
unet_extra_config = {}
|
|
|
|
latent_format = SanaLatent
|
|
sampling_settings = {
|
|
"shift": 3.0,
|
|
}
|
|
|
|
def model_type(self, state_dict, prefix=""):
|
|
return comfy.model_base.ModelType.FLOW
|
|
|
|
def get_model(self, state_dict, prefix="", device=None):
|
|
return SanaModel(model_config=self, unet_model=self.unet_class, device=device)
|
|
|
|
class SanaModel(comfy.model_base.BaseModel):
|
|
def __init__(self, *args, model_type=comfy.model_base.ModelType.FLOW, unet_model=SanaMS, **kwargs):
|
|
super().__init__(*args, model_type=model_type, unet_model=unet_model, **kwargs)
|
|
|
|
def load_sana_state_dict(sd, model_options={}):
|
|
# prefix / format
|
|
sd = sd.get("model", sd) # ref ckpt
|
|
diffusion_model_prefix = comfy.model_detection.unet_prefix_from_state_dict(sd)
|
|
temp_sd = comfy.utils.state_dict_prefix_replace(sd, {diffusion_model_prefix: ""}, filter_keys=True)
|
|
if len(temp_sd) > 0:
|
|
sd = temp_sd
|
|
|
|
# diffusers convert
|
|
if "adaln_single.linear.weight" in sd:
|
|
sd = convert_state_dict(sd)
|
|
|
|
# model config
|
|
model_config = model_config_from_unet(sd)
|
|
return load_state_dict_from_config(model_config, sd, model_options)
|
|
|
|
def model_config_from_unet(sd):
|
|
"""
|
|
Guess config based on (converted) state dict.
|
|
"""
|
|
# shared settings that match between all models
|
|
# TODO: some can (should) be enumerated
|
|
config = {
|
|
"in_channels": 32,
|
|
"linear_head_dim": 32,
|
|
"model_max_length": 300,
|
|
"y_norm": True,
|
|
"attn_type": "linear",
|
|
"ffn_type": "glumbconv",
|
|
"mlp_ratio": 2.5,
|
|
"mlp_acts": ["silu", "silu", None],
|
|
"use_pe": False,
|
|
"pred_sigma": False,
|
|
"learn_sigma": False,
|
|
"fp32_attention": True,
|
|
"patch_size": 1,
|
|
}
|
|
config["depth"] = sum([key.endswith(".point_conv.conv.weight") for key in sd.keys()]) or 28
|
|
|
|
if "x_embedder.proj.bias" in sd:
|
|
config["hidden_size"] = sd["x_embedder.proj.bias"].shape[0]
|
|
|
|
if config["hidden_size"] == 1152:
|
|
config["num_heads"] = 16
|
|
elif config["hidden_size"] == 2240:
|
|
config["num_heads"] = 20
|
|
else:
|
|
raise RuntimeError(f"Unknown model config.")
|
|
|
|
model_config = SanaConfig(config)
|
|
logging.debug(f"Sana config:\n{config}")
|
|
return model_config
|
|
|
|
# 512/1024/2K match, TODO: 4K is new, add on release
|
|
from ..PixArt.loader import resolutions as pixart_res
|
|
resolutions = {
|
|
"Sana 512": pixart_res["PixArt 512"],
|
|
"Sana 1024": pixart_res["PixArt 1024"],
|
|
"Sana 2K": pixart_res["PixArt 2K"],
|
|
}
|