ComfyUI/comfy/sd.py

489 lines
21 KiB
Python

import torch
import contextlib
import math
from comfy import model_management
from .ldm.util import instantiate_from_config
from .ldm.models.autoencoder import AutoencoderKL
import yaml
import comfy.utils
from . import clip_vision
from . import gligen
from . import diffusers_convert
from . import model_base
from . import model_detection
from . import sd1_clip
from . import sd2_clip
from . import sdxl_clip
import comfy.model_patcher
import comfy.lora
import comfy.t2i_adapter.adapter
import comfy.supported_models_base
def load_model_weights(model, sd):
m, u = model.load_state_dict(sd, strict=False)
m = set(m)
unexpected_keys = set(u)
k = list(sd.keys())
for x in k:
if x not in unexpected_keys:
w = sd.pop(x)
del w
if len(m) > 0:
print("missing", m)
return model
def load_clip_weights(model, sd):
k = list(sd.keys())
for x in k:
if x.startswith("cond_stage_model.transformer.") and not x.startswith("cond_stage_model.transformer.text_model."):
y = x.replace("cond_stage_model.transformer.", "cond_stage_model.transformer.text_model.")
sd[y] = sd.pop(x)
if 'cond_stage_model.transformer.text_model.embeddings.position_ids' in sd:
ids = sd['cond_stage_model.transformer.text_model.embeddings.position_ids']
if ids.dtype == torch.float32:
sd['cond_stage_model.transformer.text_model.embeddings.position_ids'] = ids.round()
sd = comfy.utils.transformers_convert(sd, "cond_stage_model.model.", "cond_stage_model.transformer.text_model.", 24)
return load_model_weights(model, sd)
def load_lora_for_models(model, clip, lora, strength_model, strength_clip):
key_map = comfy.lora.model_lora_keys_unet(model.model)
key_map = comfy.lora.model_lora_keys_clip(clip.cond_stage_model, key_map)
loaded = comfy.lora.load_lora(lora, key_map)
new_modelpatcher = model.clone()
k = new_modelpatcher.add_patches(loaded, strength_model)
new_clip = clip.clone()
k1 = new_clip.add_patches(loaded, strength_clip)
k = set(k)
k1 = set(k1)
for x in loaded:
if (x not in k) and (x not in k1):
print("NOT LOADED", x)
return (new_modelpatcher, new_clip)
class CLIP:
def __init__(self, target=None, embedding_directory=None, no_init=False):
if no_init:
return
params = target.params.copy()
clip = target.clip
tokenizer = target.tokenizer
load_device = model_management.text_encoder_device()
offload_device = model_management.text_encoder_offload_device()
params['device'] = offload_device
if model_management.should_use_fp16(load_device, prioritize_performance=False):
params['dtype'] = torch.float16
else:
params['dtype'] = torch.float32
self.cond_stage_model = clip(**(params))
self.tokenizer = tokenizer(embedding_directory=embedding_directory)
self.patcher = comfy.model_patcher.ModelPatcher(self.cond_stage_model, load_device=load_device, offload_device=offload_device)
self.layer_idx = None
def clone(self):
n = CLIP(no_init=True)
n.patcher = self.patcher.clone()
n.cond_stage_model = self.cond_stage_model
n.tokenizer = self.tokenizer
n.layer_idx = self.layer_idx
return n
def add_patches(self, patches, strength_patch=1.0, strength_model=1.0):
return self.patcher.add_patches(patches, strength_patch, strength_model)
def clip_layer(self, layer_idx):
self.layer_idx = layer_idx
def tokenize(self, text, return_word_ids=False):
return self.tokenizer.tokenize_with_weights(text, return_word_ids)
def encode_from_tokens(self, tokens, return_pooled=False):
if self.layer_idx is not None:
self.cond_stage_model.clip_layer(self.layer_idx)
else:
self.cond_stage_model.reset_clip_layer()
self.load_model()
cond, pooled = self.cond_stage_model.encode_token_weights(tokens)
if return_pooled:
return cond, pooled
return cond
def encode(self, text):
tokens = self.tokenize(text)
return self.encode_from_tokens(tokens)
def load_sd(self, sd):
return self.cond_stage_model.load_sd(sd)
def get_sd(self):
return self.cond_stage_model.state_dict()
def load_model(self):
model_management.load_model_gpu(self.patcher)
return self.patcher
def get_key_patches(self):
return self.patcher.get_key_patches()
class VAE:
def __init__(self, ckpt_path=None, device=None, config=None):
if config is None:
#default SD1.x/SD2.x VAE parameters
ddconfig = {'double_z': True, 'z_channels': 4, 'resolution': 256, 'in_channels': 3, 'out_ch': 3, 'ch': 128, 'ch_mult': [1, 2, 4, 4], 'num_res_blocks': 2, 'attn_resolutions': [], 'dropout': 0.0}
self.first_stage_model = AutoencoderKL(ddconfig, {'target': 'torch.nn.Identity'}, 4, monitor="val/rec_loss")
else:
self.first_stage_model = AutoencoderKL(**(config['params']))
self.first_stage_model = self.first_stage_model.eval()
if ckpt_path is not None:
sd = comfy.utils.load_torch_file(ckpt_path)
if 'decoder.up_blocks.0.resnets.0.norm1.weight' in sd.keys(): #diffusers format
sd = diffusers_convert.convert_vae_state_dict(sd)
m, u = self.first_stage_model.load_state_dict(sd, strict=False)
if len(m) > 0:
print("Missing VAE keys", m)
if device is None:
device = model_management.vae_device()
self.device = device
self.offload_device = model_management.vae_offload_device()
self.vae_dtype = model_management.vae_dtype()
self.first_stage_model.to(self.vae_dtype)
def decode_tiled_(self, samples, tile_x=64, tile_y=64, overlap = 16):
steps = samples.shape[0] * comfy.utils.get_tiled_scale_steps(samples.shape[3], samples.shape[2], tile_x, tile_y, overlap)
steps += samples.shape[0] * comfy.utils.get_tiled_scale_steps(samples.shape[3], samples.shape[2], tile_x // 2, tile_y * 2, overlap)
steps += samples.shape[0] * comfy.utils.get_tiled_scale_steps(samples.shape[3], samples.shape[2], tile_x * 2, tile_y // 2, overlap)
pbar = comfy.utils.ProgressBar(steps)
decode_fn = lambda a: (self.first_stage_model.decode(a.to(self.vae_dtype).to(self.device)) + 1.0).float()
output = torch.clamp((
(comfy.utils.tiled_scale(samples, decode_fn, tile_x // 2, tile_y * 2, overlap, upscale_amount = 8, pbar = pbar) +
comfy.utils.tiled_scale(samples, decode_fn, tile_x * 2, tile_y // 2, overlap, upscale_amount = 8, pbar = pbar) +
comfy.utils.tiled_scale(samples, decode_fn, tile_x, tile_y, overlap, upscale_amount = 8, pbar = pbar))
/ 3.0) / 2.0, min=0.0, max=1.0)
return output
def encode_tiled_(self, pixel_samples, tile_x=512, tile_y=512, overlap = 64):
steps = pixel_samples.shape[0] * comfy.utils.get_tiled_scale_steps(pixel_samples.shape[3], pixel_samples.shape[2], tile_x, tile_y, overlap)
steps += pixel_samples.shape[0] * comfy.utils.get_tiled_scale_steps(pixel_samples.shape[3], pixel_samples.shape[2], tile_x // 2, tile_y * 2, overlap)
steps += pixel_samples.shape[0] * comfy.utils.get_tiled_scale_steps(pixel_samples.shape[3], pixel_samples.shape[2], tile_x * 2, tile_y // 2, overlap)
pbar = comfy.utils.ProgressBar(steps)
encode_fn = lambda a: self.first_stage_model.encode(2. * a.to(self.vae_dtype).to(self.device) - 1.).sample().float()
samples = comfy.utils.tiled_scale(pixel_samples, encode_fn, tile_x, tile_y, overlap, upscale_amount = (1/8), out_channels=4, pbar=pbar)
samples += comfy.utils.tiled_scale(pixel_samples, encode_fn, tile_x * 2, tile_y // 2, overlap, upscale_amount = (1/8), out_channels=4, pbar=pbar)
samples += comfy.utils.tiled_scale(pixel_samples, encode_fn, tile_x // 2, tile_y * 2, overlap, upscale_amount = (1/8), out_channels=4, pbar=pbar)
samples /= 3.0
return samples
def decode(self, samples_in):
self.first_stage_model = self.first_stage_model.to(self.device)
try:
memory_used = (2562 * samples_in.shape[2] * samples_in.shape[3] * 64) * 1.7
model_management.free_memory(memory_used, self.device)
free_memory = model_management.get_free_memory(self.device)
batch_number = int(free_memory / memory_used)
batch_number = max(1, batch_number)
pixel_samples = torch.empty((samples_in.shape[0], 3, round(samples_in.shape[2] * 8), round(samples_in.shape[3] * 8)), device="cpu")
for x in range(0, samples_in.shape[0], batch_number):
samples = samples_in[x:x+batch_number].to(self.vae_dtype).to(self.device)
pixel_samples[x:x+batch_number] = torch.clamp((self.first_stage_model.decode(samples) + 1.0) / 2.0, min=0.0, max=1.0).cpu().float()
except model_management.OOM_EXCEPTION as e:
print("Warning: Ran out of memory when regular VAE decoding, retrying with tiled VAE decoding.")
pixel_samples = self.decode_tiled_(samples_in)
self.first_stage_model = self.first_stage_model.to(self.offload_device)
pixel_samples = pixel_samples.cpu().movedim(1,-1)
return pixel_samples
def decode_tiled(self, samples, tile_x=64, tile_y=64, overlap = 16):
self.first_stage_model = self.first_stage_model.to(self.device)
output = self.decode_tiled_(samples, tile_x, tile_y, overlap)
self.first_stage_model = self.first_stage_model.to(self.offload_device)
return output.movedim(1,-1)
def encode(self, pixel_samples):
self.first_stage_model = self.first_stage_model.to(self.device)
pixel_samples = pixel_samples.movedim(-1,1)
try:
memory_used = (2078 * pixel_samples.shape[2] * pixel_samples.shape[3]) * 1.7 #NOTE: this constant along with the one in the decode above are estimated from the mem usage for the VAE and could change.
model_management.free_memory(memory_used, self.device)
free_memory = model_management.get_free_memory(self.device)
batch_number = int(free_memory / memory_used)
batch_number = max(1, batch_number)
samples = torch.empty((pixel_samples.shape[0], 4, round(pixel_samples.shape[2] // 8), round(pixel_samples.shape[3] // 8)), device="cpu")
for x in range(0, pixel_samples.shape[0], batch_number):
pixels_in = (2. * pixel_samples[x:x+batch_number] - 1.).to(self.vae_dtype).to(self.device)
samples[x:x+batch_number] = self.first_stage_model.encode(pixels_in).sample().cpu().float()
except model_management.OOM_EXCEPTION as e:
print("Warning: Ran out of memory when regular VAE encoding, retrying with tiled VAE encoding.")
samples = self.encode_tiled_(pixel_samples)
self.first_stage_model = self.first_stage_model.to(self.offload_device)
return samples
def encode_tiled(self, pixel_samples, tile_x=512, tile_y=512, overlap = 64):
self.first_stage_model = self.first_stage_model.to(self.device)
pixel_samples = pixel_samples.movedim(-1,1)
samples = self.encode_tiled_(pixel_samples, tile_x=tile_x, tile_y=tile_y, overlap=overlap)
self.first_stage_model = self.first_stage_model.to(self.offload_device)
return samples
def get_sd(self):
return self.first_stage_model.state_dict()
class StyleModel:
def __init__(self, model, device="cpu"):
self.model = model
def get_cond(self, input):
return self.model(input.last_hidden_state)
def load_style_model(ckpt_path):
model_data = comfy.utils.load_torch_file(ckpt_path, safe_load=True)
keys = model_data.keys()
if "style_embedding" in keys:
model = comfy.t2i_adapter.adapter.StyleAdapter(width=1024, context_dim=768, num_head=8, n_layes=3, num_token=8)
else:
raise Exception("invalid style model {}".format(ckpt_path))
model.load_state_dict(model_data)
return StyleModel(model)
def load_clip(ckpt_paths, embedding_directory=None):
clip_data = []
for p in ckpt_paths:
clip_data.append(comfy.utils.load_torch_file(p, safe_load=True))
class EmptyClass:
pass
for i in range(len(clip_data)):
if "transformer.resblocks.0.ln_1.weight" in clip_data[i]:
clip_data[i] = comfy.utils.transformers_convert(clip_data[i], "", "text_model.", 32)
clip_target = EmptyClass()
clip_target.params = {}
if len(clip_data) == 1:
if "text_model.encoder.layers.30.mlp.fc1.weight" in clip_data[0]:
clip_target.clip = sdxl_clip.SDXLRefinerClipModel
clip_target.tokenizer = sdxl_clip.SDXLTokenizer
elif "text_model.encoder.layers.22.mlp.fc1.weight" in clip_data[0]:
clip_target.clip = sd2_clip.SD2ClipModel
clip_target.tokenizer = sd2_clip.SD2Tokenizer
else:
clip_target.clip = sd1_clip.SD1ClipModel
clip_target.tokenizer = sd1_clip.SD1Tokenizer
else:
clip_target.clip = sdxl_clip.SDXLClipModel
clip_target.tokenizer = sdxl_clip.SDXLTokenizer
clip = CLIP(clip_target, embedding_directory=embedding_directory)
for c in clip_data:
m, u = clip.load_sd(c)
if len(m) > 0:
print("clip missing:", m)
if len(u) > 0:
print("clip unexpected:", u)
return clip
def load_gligen(ckpt_path):
data = comfy.utils.load_torch_file(ckpt_path, safe_load=True)
model = gligen.load_gligen(data)
if model_management.should_use_fp16():
model = model.half()
return comfy.model_patcher.ModelPatcher(model, load_device=model_management.get_torch_device(), offload_device=model_management.unet_offload_device())
def load_checkpoint(config_path=None, ckpt_path=None, output_vae=True, output_clip=True, embedding_directory=None, state_dict=None, config=None):
#TODO: this function is a mess and should be removed eventually
if config is None:
with open(config_path, 'r') as stream:
config = yaml.safe_load(stream)
model_config_params = config['model']['params']
clip_config = model_config_params['cond_stage_config']
scale_factor = model_config_params['scale_factor']
vae_config = model_config_params['first_stage_config']
fp16 = False
if "unet_config" in model_config_params:
if "params" in model_config_params["unet_config"]:
unet_config = model_config_params["unet_config"]["params"]
if "use_fp16" in unet_config:
fp16 = unet_config["use_fp16"]
noise_aug_config = None
if "noise_aug_config" in model_config_params:
noise_aug_config = model_config_params["noise_aug_config"]
model_type = model_base.ModelType.EPS
if "parameterization" in model_config_params:
if model_config_params["parameterization"] == "v":
model_type = model_base.ModelType.V_PREDICTION
clip = None
vae = None
class WeightsLoader(torch.nn.Module):
pass
if state_dict is None:
state_dict = comfy.utils.load_torch_file(ckpt_path)
class EmptyClass:
pass
model_config = comfy.supported_models_base.BASE({})
from . import latent_formats
model_config.latent_format = latent_formats.SD15(scale_factor=scale_factor)
model_config.unet_config = unet_config
if config['model']["target"].endswith("ImageEmbeddingConditionedLatentDiffusion"):
model = model_base.SD21UNCLIP(model_config, noise_aug_config["params"], model_type=model_type)
else:
model = model_base.BaseModel(model_config, model_type=model_type)
if config['model']["target"].endswith("LatentInpaintDiffusion"):
model.set_inpaint()
if fp16:
model = model.half()
offload_device = model_management.unet_offload_device()
model = model.to(offload_device)
model.load_model_weights(state_dict, "model.diffusion_model.")
if output_vae:
w = WeightsLoader()
vae = VAE(config=vae_config)
w.first_stage_model = vae.first_stage_model
load_model_weights(w, state_dict)
if output_clip:
w = WeightsLoader()
clip_target = EmptyClass()
clip_target.params = clip_config.get("params", {})
if clip_config["target"].endswith("FrozenOpenCLIPEmbedder"):
clip_target.clip = sd2_clip.SD2ClipModel
clip_target.tokenizer = sd2_clip.SD2Tokenizer
elif clip_config["target"].endswith("FrozenCLIPEmbedder"):
clip_target.clip = sd1_clip.SD1ClipModel
clip_target.tokenizer = sd1_clip.SD1Tokenizer
clip = CLIP(clip_target, embedding_directory=embedding_directory)
w.cond_stage_model = clip.cond_stage_model
load_clip_weights(w, state_dict)
return (comfy.model_patcher.ModelPatcher(model, load_device=model_management.get_torch_device(), offload_device=offload_device), clip, vae)
def load_checkpoint_guess_config(ckpt_path, output_vae=True, output_clip=True, output_clipvision=False, embedding_directory=None):
sd = comfy.utils.load_torch_file(ckpt_path)
sd_keys = sd.keys()
clip = None
clipvision = None
vae = None
model = None
clip_target = None
parameters = comfy.utils.calculate_parameters(sd, "model.diffusion_model.")
fp16 = model_management.should_use_fp16(model_params=parameters)
class WeightsLoader(torch.nn.Module):
pass
model_config = model_detection.model_config_from_unet(sd, "model.diffusion_model.", fp16)
if model_config is None:
raise RuntimeError("ERROR: Could not detect model type of: {}".format(ckpt_path))
if model_config.clip_vision_prefix is not None:
if output_clipvision:
clipvision = clip_vision.load_clipvision_from_sd(sd, model_config.clip_vision_prefix, True)
dtype = torch.float32
if fp16:
dtype = torch.float16
inital_load_device = model_management.unet_inital_load_device(parameters, dtype)
offload_device = model_management.unet_offload_device()
model = model_config.get_model(sd, "model.diffusion_model.", device=inital_load_device)
model.load_model_weights(sd, "model.diffusion_model.")
if output_vae:
vae = VAE()
w = WeightsLoader()
w.first_stage_model = vae.first_stage_model
load_model_weights(w, sd)
if output_clip:
w = WeightsLoader()
clip_target = model_config.clip_target()
clip = CLIP(clip_target, embedding_directory=embedding_directory)
w.cond_stage_model = clip.cond_stage_model
sd = model_config.process_clip_state_dict(sd)
load_model_weights(w, sd)
left_over = sd.keys()
if len(left_over) > 0:
print("left over keys:", left_over)
model_patcher = comfy.model_patcher.ModelPatcher(model, load_device=model_management.get_torch_device(), offload_device=model_management.unet_offload_device(), current_device=inital_load_device)
if inital_load_device != torch.device("cpu"):
print("loaded straight to GPU")
model_management.load_model_gpu(model_patcher)
return (model_patcher, clip, vae, clipvision)
def load_unet(unet_path): #load unet in diffusers format
sd = comfy.utils.load_torch_file(unet_path)
parameters = comfy.utils.calculate_parameters(sd)
fp16 = model_management.should_use_fp16(model_params=parameters)
if "input_blocks.0.0.weight" in sd: #ldm
model_config = model_detection.model_config_from_unet(sd, "", fp16)
if model_config is None:
raise RuntimeError("ERROR: Could not detect model type of: {}".format(unet_path))
new_sd = sd
else: #diffusers
model_config = model_detection.model_config_from_diffusers_unet(sd, fp16)
if model_config is None:
print("ERROR UNSUPPORTED UNET", unet_path)
return None
diffusers_keys = comfy.utils.unet_to_diffusers(model_config.unet_config)
new_sd = {}
for k in diffusers_keys:
if k in sd:
new_sd[diffusers_keys[k]] = sd.pop(k)
else:
print(diffusers_keys[k], k)
offload_device = model_management.unet_offload_device()
model = model_config.get_model(new_sd, "")
model = model.to(offload_device)
model.load_model_weights(new_sd, "")
return comfy.model_patcher.ModelPatcher(model, load_device=model_management.get_torch_device(), offload_device=offload_device)
def save_checkpoint(output_path, model, clip, vae, metadata=None):
model_management.load_models_gpu([model, clip.load_model()])
sd = model.model.state_dict_for_saving(clip.get_sd(), vae.get_sd())
comfy.utils.save_torch_file(sd, output_path, metadata=metadata)