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import torch
from fcbh.ldm.modules.diffusionmodules.openaimodel import UNetModel
from fcbh.ldm.modules.encoders.noise_aug_modules import CLIPEmbeddingNoiseAugmentation
from fcbh.ldm.modules.diffusionmodules.openaimodel import Timestep
import fcbh.model_management
import fcbh.conds
from enum import Enum
from . import utils
class ModelType(Enum):
EPS = 1
V_PREDICTION = 2
from fcbh.model_sampling import EPS, V_PREDICTION, ModelSamplingDiscrete
def model_sampling(model_config, model_type):
if model_type == ModelType.EPS:
c = EPS
elif model_type == ModelType.V_PREDICTION:
c = V_PREDICTION
s = ModelSamplingDiscrete
class ModelSampling(s, c):
pass
return ModelSampling(model_config)
class BaseModel(torch.nn.Module):
def __init__(self, model_config, model_type=ModelType.EPS, device=None):
super().__init__()
unet_config = model_config.unet_config
self.latent_format = model_config.latent_format
self.model_config = model_config
if not unet_config.get("disable_unet_model_creation", False):
self.diffusion_model = UNetModel(**unet_config, device=device)
self.model_type = model_type
self.model_sampling = model_sampling(model_config, model_type)
self.adm_channels = unet_config.get("adm_in_channels", None)
if self.adm_channels is None:
self.adm_channels = 0
self.inpaint_model = False
print("model_type", model_type.name)
print("adm", self.adm_channels)
def apply_model(self, x, t, c_concat=None, c_crossattn=None, control=None, transformer_options={}, **kwargs):
sigma = t
xc = self.model_sampling.calculate_input(sigma, x)
if c_concat is not None:
xc = torch.cat([xc] + [c_concat], dim=1)
context = c_crossattn
dtype = self.get_dtype()
xc = xc.to(dtype)
t = self.model_sampling.timestep(t).float()
context = context.to(dtype)
extra_conds = {}
for o in kwargs:
extra = kwargs[o]
if hasattr(extra, "to"):
extra = extra.to(dtype)
extra_conds[o] = extra
model_output = self.diffusion_model(xc, t, context=context, control=control, transformer_options=transformer_options, **extra_conds).float()
return self.model_sampling.calculate_denoised(sigma, model_output, x)
def get_dtype(self):
return self.diffusion_model.dtype
def is_adm(self):
return self.adm_channels > 0
def encode_adm(self, **kwargs):
return None
def extra_conds(self, **kwargs):
out = {}
if self.inpaint_model:
concat_keys = ("mask", "masked_image")
cond_concat = []
denoise_mask = kwargs.get("denoise_mask", None)
latent_image = kwargs.get("latent_image", None)
noise = kwargs.get("noise", None)
device = kwargs["device"]
def blank_inpaint_image_like(latent_image):
blank_image = torch.ones_like(latent_image)
# these are the values for "zero" in pixel space translated to latent space
blank_image[:,0] *= 0.8223
blank_image[:,1] *= -0.6876
blank_image[:,2] *= 0.6364
blank_image[:,3] *= 0.1380
return blank_image
for ck in concat_keys:
if denoise_mask is not None:
if ck == "mask":
cond_concat.append(denoise_mask[:,:1].to(device))
elif ck == "masked_image":
cond_concat.append(latent_image.to(device)) #NOTE: the latent_image should be masked by the mask in pixel space
else:
if ck == "mask":
cond_concat.append(torch.ones_like(noise)[:,:1])
elif ck == "masked_image":
cond_concat.append(blank_inpaint_image_like(noise))
data = torch.cat(cond_concat, dim=1)
out['c_concat'] = fcbh.conds.CONDNoiseShape(data)
adm = self.encode_adm(**kwargs)
if adm is not None:
out['y'] = fcbh.conds.CONDRegular(adm)
return out
def load_model_weights(self, sd, unet_prefix=""):
to_load = {}
keys = list(sd.keys())
for k in keys:
if k.startswith(unet_prefix):
to_load[k[len(unet_prefix):]] = sd.pop(k)
to_load = self.model_config.process_unet_state_dict(to_load)
m, u = self.diffusion_model.load_state_dict(to_load, strict=False)
if len(m) > 0:
print("unet missing:", m)
if len(u) > 0:
print("unet unexpected:", u)
del to_load
return self
def process_latent_in(self, latent):
return self.latent_format.process_in(latent)
def process_latent_out(self, latent):
return self.latent_format.process_out(latent)
def state_dict_for_saving(self, clip_state_dict, vae_state_dict):
clip_state_dict = self.model_config.process_clip_state_dict_for_saving(clip_state_dict)
unet_sd = self.diffusion_model.state_dict()
unet_state_dict = {}
for k in unet_sd:
unet_state_dict[k] = fcbh.model_management.resolve_lowvram_weight(unet_sd[k], self.diffusion_model, k)
unet_state_dict = self.model_config.process_unet_state_dict_for_saving(unet_state_dict)
vae_state_dict = self.model_config.process_vae_state_dict_for_saving(vae_state_dict)
if self.get_dtype() == torch.float16:
clip_state_dict = utils.convert_sd_to(clip_state_dict, torch.float16)
vae_state_dict = utils.convert_sd_to(vae_state_dict, torch.float16)
if self.model_type == ModelType.V_PREDICTION:
unet_state_dict["v_pred"] = torch.tensor([])
return {**unet_state_dict, **vae_state_dict, **clip_state_dict}
def set_inpaint(self):
self.inpaint_model = True
def memory_required(self, input_shape):
area = input_shape[0] * input_shape[2] * input_shape[3]
if fcbh.model_management.xformers_enabled() or fcbh.model_management.pytorch_attention_flash_attention():
#TODO: this needs to be tweaked
return (area / (fcbh.model_management.dtype_size(self.get_dtype()) * 10)) * (1024 * 1024)
else:
#TODO: this formula might be too aggressive since I tweaked the sub-quad and split algorithms to use less memory.
return (((area * 0.6) / 0.9) + 1024) * (1024 * 1024)
def unclip_adm(unclip_conditioning, device, noise_augmentor, noise_augment_merge=0.0):
adm_inputs = []
weights = []
noise_aug = []
for unclip_cond in unclip_conditioning:
for adm_cond in unclip_cond["clip_vision_output"].image_embeds:
weight = unclip_cond["strength"]
noise_augment = unclip_cond["noise_augmentation"]
noise_level = round((noise_augmentor.max_noise_level - 1) * noise_augment)
c_adm, noise_level_emb = noise_augmentor(adm_cond.to(device), noise_level=torch.tensor([noise_level], device=device))
adm_out = torch.cat((c_adm, noise_level_emb), 1) * weight
weights.append(weight)
noise_aug.append(noise_augment)
adm_inputs.append(adm_out)
if len(noise_aug) > 1:
adm_out = torch.stack(adm_inputs).sum(0)
noise_augment = noise_augment_merge
noise_level = round((noise_augmentor.max_noise_level - 1) * noise_augment)
c_adm, noise_level_emb = noise_augmentor(adm_out[:, :noise_augmentor.time_embed.dim], noise_level=torch.tensor([noise_level], device=device))
adm_out = torch.cat((c_adm, noise_level_emb), 1)
return adm_out
class SD21UNCLIP(BaseModel):
def __init__(self, model_config, noise_aug_config, model_type=ModelType.V_PREDICTION, device=None):
super().__init__(model_config, model_type, device=device)
self.noise_augmentor = CLIPEmbeddingNoiseAugmentation(**noise_aug_config)
def encode_adm(self, **kwargs):
unclip_conditioning = kwargs.get("unclip_conditioning", None)
device = kwargs["device"]
if unclip_conditioning is None:
return torch.zeros((1, self.adm_channels))
else:
return unclip_adm(unclip_conditioning, device, self.noise_augmentor, kwargs.get("unclip_noise_augment_merge", 0.05))
def sdxl_pooled(args, noise_augmentor):
if "unclip_conditioning" in args:
return unclip_adm(args.get("unclip_conditioning", None), args["device"], noise_augmentor)[:,:1280]
else:
return args["pooled_output"]
class SDXLRefiner(BaseModel):
def __init__(self, model_config, model_type=ModelType.EPS, device=None):
super().__init__(model_config, model_type, device=device)
self.embedder = Timestep(256)
self.noise_augmentor = CLIPEmbeddingNoiseAugmentation(**{"noise_schedule_config": {"timesteps": 1000, "beta_schedule": "squaredcos_cap_v2"}, "timestep_dim": 1280})
def encode_adm(self, **kwargs):
clip_pooled = sdxl_pooled(kwargs, self.noise_augmentor)
width = kwargs.get("width", 768)
height = kwargs.get("height", 768)
crop_w = kwargs.get("crop_w", 0)
crop_h = kwargs.get("crop_h", 0)
if kwargs.get("prompt_type", "") == "negative":
aesthetic_score = kwargs.get("aesthetic_score", 2.5)
else:
aesthetic_score = kwargs.get("aesthetic_score", 6)
out = []
out.append(self.embedder(torch.Tensor([height])))
out.append(self.embedder(torch.Tensor([width])))
out.append(self.embedder(torch.Tensor([crop_h])))
out.append(self.embedder(torch.Tensor([crop_w])))
out.append(self.embedder(torch.Tensor([aesthetic_score])))
flat = torch.flatten(torch.cat(out)).unsqueeze(dim=0).repeat(clip_pooled.shape[0], 1)
return torch.cat((clip_pooled.to(flat.device), flat), dim=1)
class SDXL(BaseModel):
def __init__(self, model_config, model_type=ModelType.EPS, device=None):
super().__init__(model_config, model_type, device=device)
self.embedder = Timestep(256)
self.noise_augmentor = CLIPEmbeddingNoiseAugmentation(**{"noise_schedule_config": {"timesteps": 1000, "beta_schedule": "squaredcos_cap_v2"}, "timestep_dim": 1280})
def encode_adm(self, **kwargs):
clip_pooled = sdxl_pooled(kwargs, self.noise_augmentor)
width = kwargs.get("width", 768)
height = kwargs.get("height", 768)
crop_w = kwargs.get("crop_w", 0)
crop_h = kwargs.get("crop_h", 0)
target_width = kwargs.get("target_width", width)
target_height = kwargs.get("target_height", height)
out = []
out.append(self.embedder(torch.Tensor([height])))
out.append(self.embedder(torch.Tensor([width])))
out.append(self.embedder(torch.Tensor([crop_h])))
out.append(self.embedder(torch.Tensor([crop_w])))
out.append(self.embedder(torch.Tensor([target_height])))
out.append(self.embedder(torch.Tensor([target_width])))
flat = torch.flatten(torch.cat(out)).unsqueeze(dim=0).repeat(clip_pooled.shape[0], 1)
return torch.cat((clip_pooled.to(flat.device), flat), dim=1)
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