465 lines
17 KiB
Python
465 lines
17 KiB
Python
import torch
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import contextlib
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import sd1_clip
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import sd2_clip
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import model_management
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from ldm.util import instantiate_from_config
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from ldm.models.autoencoder import AutoencoderKL
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from omegaconf import OmegaConf
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from .cldm import cldm
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from . import utils
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def load_torch_file(ckpt):
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if ckpt.lower().endswith(".safetensors"):
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import safetensors.torch
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sd = safetensors.torch.load_file(ckpt, device="cpu")
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else:
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pl_sd = torch.load(ckpt, map_location="cpu")
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if "global_step" in pl_sd:
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print(f"Global Step: {pl_sd['global_step']}")
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if "state_dict" in pl_sd:
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sd = pl_sd["state_dict"]
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else:
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sd = pl_sd
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return sd
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def load_model_from_config(config, ckpt, verbose=False, load_state_dict_to=[]):
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print(f"Loading model from {ckpt}")
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sd = load_torch_file(ckpt)
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model = instantiate_from_config(config.model)
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m, u = model.load_state_dict(sd, strict=False)
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k = list(sd.keys())
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for x in k:
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# print(x)
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if x.startswith("cond_stage_model.transformer.") and not x.startswith("cond_stage_model.transformer.text_model."):
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y = x.replace("cond_stage_model.transformer.", "cond_stage_model.transformer.text_model.")
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sd[y] = sd.pop(x)
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if 'cond_stage_model.transformer.text_model.embeddings.position_ids' in sd:
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ids = sd['cond_stage_model.transformer.text_model.embeddings.position_ids']
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if ids.dtype == torch.float32:
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sd['cond_stage_model.transformer.text_model.embeddings.position_ids'] = ids.round()
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keys_to_replace = {
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"cond_stage_model.model.positional_embedding": "cond_stage_model.transformer.text_model.embeddings.position_embedding.weight",
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"cond_stage_model.model.token_embedding.weight": "cond_stage_model.transformer.text_model.embeddings.token_embedding.weight",
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"cond_stage_model.model.ln_final.weight": "cond_stage_model.transformer.text_model.final_layer_norm.weight",
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"cond_stage_model.model.ln_final.bias": "cond_stage_model.transformer.text_model.final_layer_norm.bias",
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}
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for x in keys_to_replace:
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if x in sd:
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sd[keys_to_replace[x]] = sd.pop(x)
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resblock_to_replace = {
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"ln_1": "layer_norm1",
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"ln_2": "layer_norm2",
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"mlp.c_fc": "mlp.fc1",
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"mlp.c_proj": "mlp.fc2",
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"attn.out_proj": "self_attn.out_proj",
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}
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for resblock in range(24):
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for x in resblock_to_replace:
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for y in ["weight", "bias"]:
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k = "cond_stage_model.model.transformer.resblocks.{}.{}.{}".format(resblock, x, y)
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k_to = "cond_stage_model.transformer.text_model.encoder.layers.{}.{}.{}".format(resblock, resblock_to_replace[x], y)
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if k in sd:
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sd[k_to] = sd.pop(k)
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for y in ["weight", "bias"]:
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k_from = "cond_stage_model.model.transformer.resblocks.{}.attn.in_proj_{}".format(resblock, y)
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if k_from in sd:
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weights = sd.pop(k_from)
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for x in range(3):
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p = ["self_attn.q_proj", "self_attn.k_proj", "self_attn.v_proj"]
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k_to = "cond_stage_model.transformer.text_model.encoder.layers.{}.{}.{}".format(resblock, p[x], y)
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sd[k_to] = weights[1024*x:1024*(x + 1)]
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for x in load_state_dict_to:
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x.load_state_dict(sd, strict=False)
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if len(m) > 0 and verbose:
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print("missing keys:")
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print(m)
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if len(u) > 0 and verbose:
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print("unexpected keys:")
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print(u)
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model.eval()
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return model
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LORA_CLIP_MAP = {
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"mlp.fc1": "mlp_fc1",
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"mlp.fc2": "mlp_fc2",
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"self_attn.k_proj": "self_attn_k_proj",
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"self_attn.q_proj": "self_attn_q_proj",
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"self_attn.v_proj": "self_attn_v_proj",
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"self_attn.out_proj": "self_attn_out_proj",
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}
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LORA_UNET_MAP = {
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"proj_in": "proj_in",
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"proj_out": "proj_out",
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"transformer_blocks.0.attn1.to_q": "transformer_blocks_0_attn1_to_q",
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"transformer_blocks.0.attn1.to_k": "transformer_blocks_0_attn1_to_k",
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"transformer_blocks.0.attn1.to_v": "transformer_blocks_0_attn1_to_v",
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"transformer_blocks.0.attn1.to_out.0": "transformer_blocks_0_attn1_to_out_0",
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"transformer_blocks.0.attn2.to_q": "transformer_blocks_0_attn2_to_q",
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"transformer_blocks.0.attn2.to_k": "transformer_blocks_0_attn2_to_k",
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"transformer_blocks.0.attn2.to_v": "transformer_blocks_0_attn2_to_v",
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"transformer_blocks.0.attn2.to_out.0": "transformer_blocks_0_attn2_to_out_0",
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"transformer_blocks.0.ff.net.0.proj": "transformer_blocks_0_ff_net_0_proj",
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"transformer_blocks.0.ff.net.2": "transformer_blocks_0_ff_net_2",
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}
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def load_lora(path, to_load):
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lora = load_torch_file(path)
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patch_dict = {}
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loaded_keys = set()
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for x in to_load:
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A_name = "{}.lora_up.weight".format(x)
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B_name = "{}.lora_down.weight".format(x)
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alpha_name = "{}.alpha".format(x)
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if A_name in lora.keys():
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alpha = None
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if alpha_name in lora.keys():
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alpha = lora[alpha_name].item()
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loaded_keys.add(alpha_name)
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patch_dict[to_load[x]] = (lora[A_name], lora[B_name], alpha)
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loaded_keys.add(A_name)
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loaded_keys.add(B_name)
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for x in lora.keys():
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if x not in loaded_keys:
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print("lora key not loaded", x)
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return patch_dict
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def model_lora_keys(model, key_map={}):
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sdk = model.state_dict().keys()
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counter = 0
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for b in range(12):
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tk = "model.diffusion_model.input_blocks.{}.1".format(b)
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up_counter = 0
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for c in LORA_UNET_MAP:
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k = "{}.{}.weight".format(tk, c)
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if k in sdk:
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lora_key = "lora_unet_down_blocks_{}_attentions_{}_{}".format(counter // 2, counter % 2, LORA_UNET_MAP[c])
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key_map[lora_key] = k
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up_counter += 1
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if up_counter >= 4:
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counter += 1
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for c in LORA_UNET_MAP:
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k = "model.diffusion_model.middle_block.1.{}.weight".format(c)
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if k in sdk:
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lora_key = "lora_unet_mid_block_attentions_0_{}".format(LORA_UNET_MAP[c])
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key_map[lora_key] = k
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counter = 3
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for b in range(12):
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tk = "model.diffusion_model.output_blocks.{}.1".format(b)
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up_counter = 0
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for c in LORA_UNET_MAP:
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k = "{}.{}.weight".format(tk, c)
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if k in sdk:
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lora_key = "lora_unet_up_blocks_{}_attentions_{}_{}".format(counter // 3, counter % 3, LORA_UNET_MAP[c])
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key_map[lora_key] = k
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up_counter += 1
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if up_counter >= 4:
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counter += 1
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counter = 0
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text_model_lora_key = "lora_te_text_model_encoder_layers_{}_{}"
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for b in range(24):
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for c in LORA_CLIP_MAP:
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k = "transformer.text_model.encoder.layers.{}.{}.weight".format(b, c)
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if k in sdk:
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lora_key = text_model_lora_key.format(b, LORA_CLIP_MAP[c])
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key_map[lora_key] = k
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return key_map
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class ModelPatcher:
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def __init__(self, model):
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self.model = model
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self.patches = []
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self.backup = {}
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def clone(self):
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n = ModelPatcher(self.model)
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n.patches = self.patches[:]
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return n
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def add_patches(self, patches, strength=1.0):
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p = {}
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model_sd = self.model.state_dict()
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for k in patches:
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if k in model_sd:
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p[k] = patches[k]
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self.patches += [(strength, p)]
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return p.keys()
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def patch_model(self):
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model_sd = self.model.state_dict()
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for p in self.patches:
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for k in p[1]:
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v = p[1][k]
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key = k
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if key not in model_sd:
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print("could not patch. key doesn't exist in model:", k)
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continue
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weight = model_sd[key]
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if key not in self.backup:
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self.backup[key] = weight.clone()
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alpha = p[0]
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mat1 = v[0]
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mat2 = v[1]
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if v[2] is not None:
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alpha *= v[2] / mat2.shape[0]
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weight += (alpha * torch.mm(mat1.flatten(start_dim=1).float(), mat2.flatten(start_dim=1).float())).reshape(weight.shape).type(weight.dtype).to(weight.device)
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return self.model
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def unpatch_model(self):
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model_sd = self.model.state_dict()
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for k in self.backup:
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model_sd[k][:] = self.backup[k]
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self.backup = {}
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def load_lora_for_models(model, clip, lora_path, strength_model, strength_clip):
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key_map = model_lora_keys(model.model)
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key_map = model_lora_keys(clip.cond_stage_model, key_map)
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loaded = load_lora(lora_path, key_map)
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new_modelpatcher = model.clone()
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k = new_modelpatcher.add_patches(loaded, strength_model)
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new_clip = clip.clone()
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k1 = new_clip.add_patches(loaded, strength_clip)
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k = set(k)
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k1 = set(k1)
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for x in loaded:
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if (x not in k) and (x not in k1):
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print("NOT LOADED", x)
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return (new_modelpatcher, new_clip)
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class CLIP:
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def __init__(self, config={}, embedding_directory=None, no_init=False):
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if no_init:
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return
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self.target_clip = config["target"]
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if "params" in config:
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params = config["params"]
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else:
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params = {}
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if self.target_clip == "ldm.modules.encoders.modules.FrozenOpenCLIPEmbedder":
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clip = sd2_clip.SD2ClipModel
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tokenizer = sd2_clip.SD2Tokenizer
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elif self.target_clip == "ldm.modules.encoders.modules.FrozenCLIPEmbedder":
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clip = sd1_clip.SD1ClipModel
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tokenizer = sd1_clip.SD1Tokenizer
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self.cond_stage_model = clip(**(params))
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self.tokenizer = tokenizer(embedding_directory=embedding_directory)
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self.patcher = ModelPatcher(self.cond_stage_model)
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def clone(self):
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n = CLIP(no_init=True)
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n.target_clip = self.target_clip
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n.patcher = self.patcher.clone()
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n.cond_stage_model = self.cond_stage_model
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n.tokenizer = self.tokenizer
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return n
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def load_from_state_dict(self, sd):
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self.cond_stage_model.transformer.load_state_dict(sd, strict=False)
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def add_patches(self, patches, strength=1.0):
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return self.patcher.add_patches(patches, strength)
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def clip_layer(self, layer_idx):
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return self.cond_stage_model.clip_layer(layer_idx)
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def encode(self, text):
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tokens = self.tokenizer.tokenize_with_weights(text)
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try:
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self.patcher.patch_model()
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cond = self.cond_stage_model.encode_token_weights(tokens)
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self.patcher.unpatch_model()
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except Exception as e:
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self.patcher.unpatch_model()
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raise e
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return cond
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class VAE:
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def __init__(self, ckpt_path=None, scale_factor=0.18215, device="cuda", config=None):
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if config is None:
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#default SD1.x/SD2.x VAE parameters
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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}
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self.first_stage_model = AutoencoderKL(ddconfig, {'target': 'torch.nn.Identity'}, 4, monitor="val/rec_loss", ckpt_path=ckpt_path)
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else:
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self.first_stage_model = AutoencoderKL(**(config['params']), ckpt_path=ckpt_path)
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self.first_stage_model = self.first_stage_model.eval()
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self.scale_factor = scale_factor
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self.device = device
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def decode(self, samples):
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model_management.unload_model()
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self.first_stage_model = self.first_stage_model.to(self.device)
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samples = samples.to(self.device)
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pixel_samples = self.first_stage_model.decode(1. / self.scale_factor * samples)
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pixel_samples = torch.clamp((pixel_samples + 1.0) / 2.0, min=0.0, max=1.0)
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self.first_stage_model = self.first_stage_model.cpu()
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pixel_samples = pixel_samples.cpu().movedim(1,-1)
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return pixel_samples
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def encode(self, pixel_samples):
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model_management.unload_model()
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self.first_stage_model = self.first_stage_model.to(self.device)
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pixel_samples = pixel_samples.movedim(-1,1).to(self.device)
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samples = self.first_stage_model.encode(2. * pixel_samples - 1.).sample() * self.scale_factor
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self.first_stage_model = self.first_stage_model.cpu()
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samples = samples.cpu()
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return samples
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class ControlNet:
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def __init__(self, control_model, device="cuda"):
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self.control_model = control_model
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self.cond_hint_original = None
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self.cond_hint = None
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self.strength = 1.0
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self.device = device
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def get_control(self, x_noisy, t, cond_txt):
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output_dtype = x_noisy.dtype
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if self.cond_hint is None or x_noisy.shape[2] * 8 != self.cond_hint.shape[2] or x_noisy.shape[3] * 8 != self.cond_hint.shape[3]:
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if self.cond_hint is not None:
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del self.cond_hint
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self.cond_hint = None
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self.cond_hint = utils.common_upscale(self.cond_hint_original, x_noisy.shape[3] * 8, x_noisy.shape[2] * 8, 'nearest-exact', "center").to(self.control_model.dtype).to(self.device)
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if self.control_model.dtype == torch.float16:
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precision_scope = torch.autocast
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else:
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precision_scope = contextlib.nullcontext
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with precision_scope(self.device):
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control = self.control_model(x=x_noisy, hint=self.cond_hint, timesteps=t, context=cond_txt)
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out = []
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autocast_enabled = torch.is_autocast_enabled()
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for x in control:
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x *= self.strength
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if x.dtype != output_dtype and not autocast_enabled:
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x = x.to(output_dtype)
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out.append(x)
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return out
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def set_cond_hint(self, cond_hint, strength=1.0):
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self.cond_hint_original = cond_hint
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self.strength = strength
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return self
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def cleanup(self):
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if self.cond_hint is not None:
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del self.cond_hint
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self.cond_hint = None
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def copy(self):
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c = ControlNet(self.control_model)
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c.cond_hint_original = self.cond_hint_original
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c.strength = self.strength
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return c
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def load_controlnet(ckpt_path):
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controlnet_data = load_torch_file(ckpt_path)
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pth_key = 'control_model.input_blocks.1.1.transformer_blocks.0.attn2.to_k.weight'
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pth = False
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sd2 = False
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key = 'input_blocks.1.1.transformer_blocks.0.attn2.to_k.weight'
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if pth_key in controlnet_data:
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pth = True
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key = pth_key
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elif key in controlnet_data:
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pass
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else:
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print("error checkpoint does not contain controlnet data", ckpt_path)
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return None
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context_dim = controlnet_data[key].shape[1]
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use_fp16 = False
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if controlnet_data[key].dtype == torch.float16:
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use_fp16 = True
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control_model = cldm.ControlNet(image_size=32,
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in_channels=4,
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hint_channels=3,
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model_channels=320,
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attention_resolutions=[ 4, 2, 1 ],
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num_res_blocks=2,
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channel_mult=[ 1, 2, 4, 4 ],
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num_heads=8,
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use_spatial_transformer=True,
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transformer_depth=1,
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context_dim=context_dim,
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use_checkpoint=True,
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legacy=False,
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use_fp16=use_fp16)
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if pth:
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class WeightsLoader(torch.nn.Module):
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pass
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w = WeightsLoader()
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w.control_model = control_model
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w.load_state_dict(controlnet_data, strict=False)
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else:
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control_model.load_state_dict(controlnet_data, strict=False)
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control = ControlNet(control_model)
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return control
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def load_clip(ckpt_path, embedding_directory=None):
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clip_data = load_torch_file(ckpt_path)
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config = {}
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if "text_model.encoder.layers.22.mlp.fc1.weight" in clip_data:
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config['target'] = 'ldm.modules.encoders.modules.FrozenOpenCLIPEmbedder'
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else:
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config['target'] = 'ldm.modules.encoders.modules.FrozenCLIPEmbedder'
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clip = CLIP(config=config, embedding_directory=embedding_directory)
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clip.load_from_state_dict(clip_data)
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return clip
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def load_checkpoint(config_path, ckpt_path, output_vae=True, output_clip=True, embedding_directory=None):
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config = OmegaConf.load(config_path)
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model_config_params = config['model']['params']
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clip_config = model_config_params['cond_stage_config']
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scale_factor = model_config_params['scale_factor']
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vae_config = model_config_params['first_stage_config']
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|
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clip = None
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vae = None
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|
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class WeightsLoader(torch.nn.Module):
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pass
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|
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w = WeightsLoader()
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load_state_dict_to = []
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if output_vae:
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vae = VAE(scale_factor=scale_factor, config=vae_config)
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w.first_stage_model = vae.first_stage_model
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|
load_state_dict_to = [w]
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|
|
|
if output_clip:
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|
clip = CLIP(config=clip_config, embedding_directory=embedding_directory)
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|
w.cond_stage_model = clip.cond_stage_model
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|
load_state_dict_to = [w]
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|
|
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model = load_model_from_config(config, ckpt_path, verbose=False, load_state_dict_to=load_state_dict_to)
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|
return (ModelPatcher(model), clip, vae)
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