# Copyright 2024 The HuggingFace Inc. team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """Conversion script for the Stable Diffusion checkpoints.""" import re from contextlib import nullcontext from io import BytesIO from typing import Dict, Optional, Union import requests import torch import yaml from transformers import ( AutoFeatureExtractor, BertTokenizerFast, CLIPImageProcessor, CLIPTextConfig, CLIPTextModel, CLIPTextModelWithProjection, CLIPTokenizer, CLIPVisionConfig, CLIPVisionModelWithProjection, ) from ...models import ( AutoencoderKL, ControlNetModel, PriorTransformer, UNet2DConditionModel, ) from ...schedulers import ( DDIMScheduler, DDPMScheduler, DPMSolverMultistepScheduler, EulerAncestralDiscreteScheduler, EulerDiscreteScheduler, HeunDiscreteScheduler, LMSDiscreteScheduler, PNDMScheduler, UnCLIPScheduler, ) from ...utils import is_accelerate_available, logging from ..latent_diffusion.pipeline_latent_diffusion import LDMBertConfig, LDMBertModel from ..paint_by_example import PaintByExampleImageEncoder from ..pipeline_utils import DiffusionPipeline from .safety_checker import StableDiffusionSafetyChecker from .stable_unclip_image_normalizer import StableUnCLIPImageNormalizer if is_accelerate_available(): from accelerate import init_empty_weights from accelerate.utils import set_module_tensor_to_device logger = logging.get_logger(__name__) # pylint: disable=invalid-name def shave_segments(path, n_shave_prefix_segments=1): """ Removes segments. Positive values shave the first segments, negative shave the last segments. """ if n_shave_prefix_segments >= 0: return ".".join(path.split(".")[n_shave_prefix_segments:]) else: return ".".join(path.split(".")[:n_shave_prefix_segments]) def renew_resnet_paths(old_list, n_shave_prefix_segments=0): """ Updates paths inside resnets to the new naming scheme (local renaming) """ mapping = [] for old_item in old_list: new_item = old_item.replace("in_layers.0", "norm1") new_item = new_item.replace("in_layers.2", "conv1") new_item = new_item.replace("out_layers.0", "norm2") new_item = new_item.replace("out_layers.3", "conv2") new_item = new_item.replace("emb_layers.1", "time_emb_proj") new_item = new_item.replace("skip_connection", "conv_shortcut") new_item = shave_segments(new_item, n_shave_prefix_segments=n_shave_prefix_segments) mapping.append({"old": old_item, "new": new_item}) return mapping def renew_vae_resnet_paths(old_list, n_shave_prefix_segments=0): """ Updates paths inside resnets to the new naming scheme (local renaming) """ mapping = [] for old_item in old_list: new_item = old_item new_item = new_item.replace("nin_shortcut", "conv_shortcut") new_item = shave_segments(new_item, n_shave_prefix_segments=n_shave_prefix_segments) mapping.append({"old": old_item, "new": new_item}) return mapping def renew_attention_paths(old_list, n_shave_prefix_segments=0): """ Updates paths inside attentions to the new naming scheme (local renaming) """ mapping = [] for old_item in old_list: new_item = old_item # new_item = new_item.replace('norm.weight', 'group_norm.weight') # new_item = new_item.replace('norm.bias', 'group_norm.bias') # new_item = new_item.replace('proj_out.weight', 'proj_attn.weight') # new_item = new_item.replace('proj_out.bias', 'proj_attn.bias') # new_item = shave_segments(new_item, n_shave_prefix_segments=n_shave_prefix_segments) mapping.append({"old": old_item, "new": new_item}) return mapping def renew_vae_attention_paths(old_list, n_shave_prefix_segments=0): """ Updates paths inside attentions to the new naming scheme (local renaming) """ mapping = [] for old_item in old_list: new_item = old_item new_item = new_item.replace("norm.weight", "group_norm.weight") new_item = new_item.replace("norm.bias", "group_norm.bias") new_item = new_item.replace("q.weight", "to_q.weight") new_item = new_item.replace("q.bias", "to_q.bias") new_item = new_item.replace("k.weight", "to_k.weight") new_item = new_item.replace("k.bias", "to_k.bias") new_item = new_item.replace("v.weight", "to_v.weight") new_item = new_item.replace("v.bias", "to_v.bias") new_item = new_item.replace("proj_out.weight", "to_out.0.weight") new_item = new_item.replace("proj_out.bias", "to_out.0.bias") new_item = shave_segments(new_item, n_shave_prefix_segments=n_shave_prefix_segments) mapping.append({"old": old_item, "new": new_item}) return mapping def assign_to_checkpoint( paths, checkpoint, old_checkpoint, attention_paths_to_split=None, additional_replacements=None, config=None ): """ This does the final conversion step: take locally converted weights and apply a global renaming to them. It splits attention layers, and takes into account additional replacements that may arise. Assigns the weights to the new checkpoint. """ assert isinstance(paths, list), "Paths should be a list of dicts containing 'old' and 'new' keys." # Splits the attention layers into three variables. if attention_paths_to_split is not None: for path, path_map in attention_paths_to_split.items(): old_tensor = old_checkpoint[path] channels = old_tensor.shape[0] // 3 target_shape = (-1, channels) if len(old_tensor.shape) == 3 else (-1) num_heads = old_tensor.shape[0] // config["num_head_channels"] // 3 old_tensor = old_tensor.reshape((num_heads, 3 * channels // num_heads) + old_tensor.shape[1:]) query, key, value = old_tensor.split(channels // num_heads, dim=1) checkpoint[path_map["query"]] = query.reshape(target_shape) checkpoint[path_map["key"]] = key.reshape(target_shape) checkpoint[path_map["value"]] = value.reshape(target_shape) for path in paths: new_path = path["new"] # These have already been assigned if attention_paths_to_split is not None and new_path in attention_paths_to_split: continue # Global renaming happens here new_path = new_path.replace("middle_block.0", "mid_block.resnets.0") new_path = new_path.replace("middle_block.1", "mid_block.attentions.0") new_path = new_path.replace("middle_block.2", "mid_block.resnets.1") if additional_replacements is not None: for replacement in additional_replacements: new_path = new_path.replace(replacement["old"], replacement["new"]) # proj_attn.weight has to be converted from conv 1D to linear is_attn_weight = "proj_attn.weight" in new_path or ("attentions" in new_path and "to_" in new_path) shape = old_checkpoint[path["old"]].shape if is_attn_weight and len(shape) == 3: checkpoint[new_path] = old_checkpoint[path["old"]][:, :, 0] elif is_attn_weight and len(shape) == 4: checkpoint[new_path] = old_checkpoint[path["old"]][:, :, 0, 0] else: checkpoint[new_path] = old_checkpoint[path["old"]] def conv_attn_to_linear(checkpoint): keys = list(checkpoint.keys()) attn_keys = ["query.weight", "key.weight", "value.weight"] for key in keys: if ".".join(key.split(".")[-2:]) in attn_keys: if checkpoint[key].ndim > 2: checkpoint[key] = checkpoint[key][:, :, 0, 0] elif "proj_attn.weight" in key: if checkpoint[key].ndim > 2: checkpoint[key] = checkpoint[key][:, :, 0] def create_unet_diffusers_config(original_config, image_size: int, controlnet=False): """ Creates a config for the diffusers based on the config of the LDM model. """ if controlnet: unet_params = original_config["model"]["params"]["control_stage_config"]["params"] else: if ( "unet_config" in original_config["model"]["params"] and original_config["model"]["params"]["unet_config"] is not None ): unet_params = original_config["model"]["params"]["unet_config"]["params"] else: unet_params = original_config["model"]["params"]["network_config"]["params"] vae_params = original_config["model"]["params"]["first_stage_config"]["params"]["ddconfig"] block_out_channels = [unet_params["model_channels"] * mult for mult in unet_params["channel_mult"]] down_block_types = [] resolution = 1 for i in range(len(block_out_channels)): block_type = "CrossAttnDownBlock2D" if resolution in unet_params["attention_resolutions"] else "DownBlock2D" down_block_types.append(block_type) if i != len(block_out_channels) - 1: resolution *= 2 up_block_types = [] for i in range(len(block_out_channels)): block_type = "CrossAttnUpBlock2D" if resolution in unet_params["attention_resolutions"] else "UpBlock2D" up_block_types.append(block_type) resolution //= 2 if unet_params["transformer_depth"] is not None: transformer_layers_per_block = ( unet_params["transformer_depth"] if isinstance(unet_params["transformer_depth"], int) else list(unet_params["transformer_depth"]) ) else: transformer_layers_per_block = 1 vae_scale_factor = 2 ** (len(vae_params["ch_mult"]) - 1) head_dim = unet_params["num_heads"] if "num_heads" in unet_params else None use_linear_projection = ( unet_params["use_linear_in_transformer"] if "use_linear_in_transformer" in unet_params else False ) if use_linear_projection: # stable diffusion 2-base-512 and 2-768 if head_dim is None: head_dim_mult = unet_params["model_channels"] // unet_params["num_head_channels"] head_dim = [head_dim_mult * c for c in list(unet_params["channel_mult"])] class_embed_type = None addition_embed_type = None addition_time_embed_dim = None projection_class_embeddings_input_dim = None context_dim = None if unet_params["context_dim"] is not None: context_dim = ( unet_params["context_dim"] if isinstance(unet_params["context_dim"], int) else unet_params["context_dim"][0] ) if "num_classes" in unet_params: if unet_params["num_classes"] == "sequential": if context_dim in [2048, 1280]: # SDXL addition_embed_type = "text_time" addition_time_embed_dim = 256 else: class_embed_type = "projection" assert "adm_in_channels" in unet_params projection_class_embeddings_input_dim = unet_params["adm_in_channels"] config = { "sample_size": image_size // vae_scale_factor, "in_channels": unet_params["in_channels"], "down_block_types": tuple(down_block_types), "block_out_channels": tuple(block_out_channels), "layers_per_block": unet_params["num_res_blocks"], "cross_attention_dim": context_dim, "attention_head_dim": head_dim, "use_linear_projection": use_linear_projection, "class_embed_type": class_embed_type, "addition_embed_type": addition_embed_type, "addition_time_embed_dim": addition_time_embed_dim, "projection_class_embeddings_input_dim": projection_class_embeddings_input_dim, "transformer_layers_per_block": transformer_layers_per_block, } if "disable_self_attentions" in unet_params: config["only_cross_attention"] = unet_params["disable_self_attentions"] if "num_classes" in unet_params and isinstance(unet_params["num_classes"], int): config["num_class_embeds"] = unet_params["num_classes"] if controlnet: config["conditioning_channels"] = unet_params["hint_channels"] else: config["out_channels"] = unet_params["out_channels"] config["up_block_types"] = tuple(up_block_types) return config def create_vae_diffusers_config(original_config, image_size: int): """ Creates a config for the diffusers based on the config of the LDM model. """ vae_params = original_config["model"]["params"]["first_stage_config"]["params"]["ddconfig"] _ = original_config["model"]["params"]["first_stage_config"]["params"]["embed_dim"] block_out_channels = [vae_params["ch"] * mult for mult in vae_params["ch_mult"]] down_block_types = ["DownEncoderBlock2D"] * len(block_out_channels) up_block_types = ["UpDecoderBlock2D"] * len(block_out_channels) config = { "sample_size": image_size, "in_channels": vae_params["in_channels"], "out_channels": vae_params["out_ch"], "down_block_types": tuple(down_block_types), "up_block_types": tuple(up_block_types), "block_out_channels": tuple(block_out_channels), "latent_channels": vae_params["z_channels"], "layers_per_block": vae_params["num_res_blocks"], } return config def create_diffusers_schedular(original_config): schedular = DDIMScheduler( num_train_timesteps=original_config["model"]["params"]["timesteps"], beta_start=original_config["model"]["params"]["linear_start"], beta_end=original_config["model"]["params"]["linear_end"], beta_schedule="scaled_linear", ) return schedular def create_ldm_bert_config(original_config): bert_params = original_config["model"]["params"]["cond_stage_config"]["params"] config = LDMBertConfig( d_model=bert_params.n_embed, encoder_layers=bert_params.n_layer, encoder_ffn_dim=bert_params.n_embed * 4, ) return config def convert_ldm_unet_checkpoint( checkpoint, config, path=None, extract_ema=False, controlnet=False, skip_extract_state_dict=False ): """ Takes a state dict and a config, and returns a converted checkpoint. """ if skip_extract_state_dict: unet_state_dict = checkpoint else: # extract state_dict for UNet unet_state_dict = {} keys = list(checkpoint.keys()) if controlnet: unet_key = "control_model." else: unet_key = "model.diffusion_model." # at least a 100 parameters have to start with `model_ema` in order for the checkpoint to be EMA if sum(k.startswith("model_ema") for k in keys) > 100 and extract_ema: logger.warning(f"Checkpoint {path} has both EMA and non-EMA weights.") logger.warning( "In this conversion only the EMA weights are extracted. If you want to instead extract the non-EMA" " weights (useful to continue fine-tuning), please make sure to remove the `--extract_ema` flag." ) for key in keys: if key.startswith("model.diffusion_model"): flat_ema_key = "model_ema." + "".join(key.split(".")[1:]) unet_state_dict[key.replace(unet_key, "")] = checkpoint.pop(flat_ema_key) else: if sum(k.startswith("model_ema") for k in keys) > 100: logger.warning( "In this conversion only the non-EMA weights are extracted. If you want to instead extract the EMA" " weights (usually better for inference), please make sure to add the `--extract_ema` flag." ) for key in keys: if key.startswith(unet_key): unet_state_dict[key.replace(unet_key, "")] = checkpoint.pop(key) new_checkpoint = {} new_checkpoint["time_embedding.linear_1.weight"] = unet_state_dict["time_embed.0.weight"] new_checkpoint["time_embedding.linear_1.bias"] = unet_state_dict["time_embed.0.bias"] new_checkpoint["time_embedding.linear_2.weight"] = unet_state_dict["time_embed.2.weight"] new_checkpoint["time_embedding.linear_2.bias"] = unet_state_dict["time_embed.2.bias"] if config["class_embed_type"] is None: # No parameters to port ... elif config["class_embed_type"] == "timestep" or config["class_embed_type"] == "projection": new_checkpoint["class_embedding.linear_1.weight"] = unet_state_dict["label_emb.0.0.weight"] new_checkpoint["class_embedding.linear_1.bias"] = unet_state_dict["label_emb.0.0.bias"] new_checkpoint["class_embedding.linear_2.weight"] = unet_state_dict["label_emb.0.2.weight"] new_checkpoint["class_embedding.linear_2.bias"] = unet_state_dict["label_emb.0.2.bias"] else: raise NotImplementedError(f"Not implemented `class_embed_type`: {config['class_embed_type']}") if config["addition_embed_type"] == "text_time": new_checkpoint["add_embedding.linear_1.weight"] = unet_state_dict["label_emb.0.0.weight"] new_checkpoint["add_embedding.linear_1.bias"] = unet_state_dict["label_emb.0.0.bias"] new_checkpoint["add_embedding.linear_2.weight"] = unet_state_dict["label_emb.0.2.weight"] new_checkpoint["add_embedding.linear_2.bias"] = unet_state_dict["label_emb.0.2.bias"] # Relevant to StableDiffusionUpscalePipeline if "num_class_embeds" in config: if (config["num_class_embeds"] is not None) and ("label_emb.weight" in unet_state_dict): new_checkpoint["class_embedding.weight"] = unet_state_dict["label_emb.weight"] new_checkpoint["conv_in.weight"] = unet_state_dict["input_blocks.0.0.weight"] new_checkpoint["conv_in.bias"] = unet_state_dict["input_blocks.0.0.bias"] if not controlnet: new_checkpoint["conv_norm_out.weight"] = unet_state_dict["out.0.weight"] new_checkpoint["conv_norm_out.bias"] = unet_state_dict["out.0.bias"] new_checkpoint["conv_out.weight"] = unet_state_dict["out.2.weight"] new_checkpoint["conv_out.bias"] = unet_state_dict["out.2.bias"] # Retrieves the keys for the input blocks only num_input_blocks = len({".".join(layer.split(".")[:2]) for layer in unet_state_dict if "input_blocks" in layer}) input_blocks = { layer_id: [key for key in unet_state_dict if f"input_blocks.{layer_id}" in key] for layer_id in range(num_input_blocks) } # Retrieves the keys for the middle blocks only num_middle_blocks = len({".".join(layer.split(".")[:2]) for layer in unet_state_dict if "middle_block" in layer}) middle_blocks = { layer_id: [key for key in unet_state_dict if f"middle_block.{layer_id}" in key] for layer_id in range(num_middle_blocks) } # Retrieves the keys for the output blocks only num_output_blocks = len({".".join(layer.split(".")[:2]) for layer in unet_state_dict if "output_blocks" in layer}) output_blocks = { layer_id: [key for key in unet_state_dict if f"output_blocks.{layer_id}" in key] for layer_id in range(num_output_blocks) } for i in range(1, num_input_blocks): block_id = (i - 1) // (config["layers_per_block"] + 1) layer_in_block_id = (i - 1) % (config["layers_per_block"] + 1) resnets = [ key for key in input_blocks[i] if f"input_blocks.{i}.0" in key and f"input_blocks.{i}.0.op" not in key ] attentions = [key for key in input_blocks[i] if f"input_blocks.{i}.1" in key] if f"input_blocks.{i}.0.op.weight" in unet_state_dict: new_checkpoint[f"down_blocks.{block_id}.downsamplers.0.conv.weight"] = unet_state_dict.pop( f"input_blocks.{i}.0.op.weight" ) new_checkpoint[f"down_blocks.{block_id}.downsamplers.0.conv.bias"] = unet_state_dict.pop( f"input_blocks.{i}.0.op.bias" ) paths = renew_resnet_paths(resnets) meta_path = {"old": f"input_blocks.{i}.0", "new": f"down_blocks.{block_id}.resnets.{layer_in_block_id}"} assign_to_checkpoint( paths, new_checkpoint, unet_state_dict, additional_replacements=[meta_path], config=config ) if len(attentions): paths = renew_attention_paths(attentions) meta_path = {"old": f"input_blocks.{i}.1", "new": f"down_blocks.{block_id}.attentions.{layer_in_block_id}"} assign_to_checkpoint( paths, new_checkpoint, unet_state_dict, additional_replacements=[meta_path], config=config ) resnet_0 = middle_blocks[0] attentions = middle_blocks[1] resnet_1 = middle_blocks[2] resnet_0_paths = renew_resnet_paths(resnet_0) assign_to_checkpoint(resnet_0_paths, new_checkpoint, unet_state_dict, config=config) resnet_1_paths = renew_resnet_paths(resnet_1) assign_to_checkpoint(resnet_1_paths, new_checkpoint, unet_state_dict, config=config) attentions_paths = renew_attention_paths(attentions) meta_path = {"old": "middle_block.1", "new": "mid_block.attentions.0"} assign_to_checkpoint( attentions_paths, new_checkpoint, unet_state_dict, additional_replacements=[meta_path], config=config ) for i in range(num_output_blocks): block_id = i // (config["layers_per_block"] + 1) layer_in_block_id = i % (config["layers_per_block"] + 1) output_block_layers = [shave_segments(name, 2) for name in output_blocks[i]] output_block_list = {} for layer in output_block_layers: layer_id, layer_name = layer.split(".")[0], shave_segments(layer, 1) if layer_id in output_block_list: output_block_list[layer_id].append(layer_name) else: output_block_list[layer_id] = [layer_name] if len(output_block_list) > 1: resnets = [key for key in output_blocks[i] if f"output_blocks.{i}.0" in key] attentions = [key for key in output_blocks[i] if f"output_blocks.{i}.1" in key] resnet_0_paths = renew_resnet_paths(resnets) paths = renew_resnet_paths(resnets) meta_path = {"old": f"output_blocks.{i}.0", "new": f"up_blocks.{block_id}.resnets.{layer_in_block_id}"} assign_to_checkpoint( paths, new_checkpoint, unet_state_dict, additional_replacements=[meta_path], config=config ) output_block_list = {k: sorted(v) for k, v in output_block_list.items()} if ["conv.bias", "conv.weight"] in output_block_list.values(): index = list(output_block_list.values()).index(["conv.bias", "conv.weight"]) new_checkpoint[f"up_blocks.{block_id}.upsamplers.0.conv.weight"] = unet_state_dict[ f"output_blocks.{i}.{index}.conv.weight" ] new_checkpoint[f"up_blocks.{block_id}.upsamplers.0.conv.bias"] = unet_state_dict[ f"output_blocks.{i}.{index}.conv.bias" ] # Clear attentions as they have been attributed above. if len(attentions) == 2: attentions = [] if len(attentions): paths = renew_attention_paths(attentions) meta_path = { "old": f"output_blocks.{i}.1", "new": f"up_blocks.{block_id}.attentions.{layer_in_block_id}", } assign_to_checkpoint( paths, new_checkpoint, unet_state_dict, additional_replacements=[meta_path], config=config ) else: resnet_0_paths = renew_resnet_paths(output_block_layers, n_shave_prefix_segments=1) for path in resnet_0_paths: old_path = ".".join(["output_blocks", str(i), path["old"]]) new_path = ".".join(["up_blocks", str(block_id), "resnets", str(layer_in_block_id), path["new"]]) new_checkpoint[new_path] = unet_state_dict[old_path] if controlnet: # conditioning embedding orig_index = 0 new_checkpoint["controlnet_cond_embedding.conv_in.weight"] = unet_state_dict.pop( f"input_hint_block.{orig_index}.weight" ) new_checkpoint["controlnet_cond_embedding.conv_in.bias"] = unet_state_dict.pop( f"input_hint_block.{orig_index}.bias" ) orig_index += 2 diffusers_index = 0 while diffusers_index < 6: new_checkpoint[f"controlnet_cond_embedding.blocks.{diffusers_index}.weight"] = unet_state_dict.pop( f"input_hint_block.{orig_index}.weight" ) new_checkpoint[f"controlnet_cond_embedding.blocks.{diffusers_index}.bias"] = unet_state_dict.pop( f"input_hint_block.{orig_index}.bias" ) diffusers_index += 1 orig_index += 2 new_checkpoint["controlnet_cond_embedding.conv_out.weight"] = unet_state_dict.pop( f"input_hint_block.{orig_index}.weight" ) new_checkpoint["controlnet_cond_embedding.conv_out.bias"] = unet_state_dict.pop( f"input_hint_block.{orig_index}.bias" ) # down blocks for i in range(num_input_blocks): new_checkpoint[f"controlnet_down_blocks.{i}.weight"] = unet_state_dict.pop(f"zero_convs.{i}.0.weight") new_checkpoint[f"controlnet_down_blocks.{i}.bias"] = unet_state_dict.pop(f"zero_convs.{i}.0.bias") # mid block new_checkpoint["controlnet_mid_block.weight"] = unet_state_dict.pop("middle_block_out.0.weight") new_checkpoint["controlnet_mid_block.bias"] = unet_state_dict.pop("middle_block_out.0.bias") return new_checkpoint def convert_ldm_vae_checkpoint(checkpoint, config): # extract state dict for VAE vae_state_dict = {} keys = list(checkpoint.keys()) vae_key = "first_stage_model." if any(k.startswith("first_stage_model.") for k in keys) else "" for key in keys: if key.startswith(vae_key): vae_state_dict[key.replace(vae_key, "")] = checkpoint.get(key) new_checkpoint = {} new_checkpoint["encoder.conv_in.weight"] = vae_state_dict["encoder.conv_in.weight"] new_checkpoint["encoder.conv_in.bias"] = vae_state_dict["encoder.conv_in.bias"] new_checkpoint["encoder.conv_out.weight"] = vae_state_dict["encoder.conv_out.weight"] new_checkpoint["encoder.conv_out.bias"] = vae_state_dict["encoder.conv_out.bias"] new_checkpoint["encoder.conv_norm_out.weight"] = vae_state_dict["encoder.norm_out.weight"] new_checkpoint["encoder.conv_norm_out.bias"] = vae_state_dict["encoder.norm_out.bias"] new_checkpoint["decoder.conv_in.weight"] = vae_state_dict["decoder.conv_in.weight"] new_checkpoint["decoder.conv_in.bias"] = vae_state_dict["decoder.conv_in.bias"] new_checkpoint["decoder.conv_out.weight"] = vae_state_dict["decoder.conv_out.weight"] new_checkpoint["decoder.conv_out.bias"] = vae_state_dict["decoder.conv_out.bias"] new_checkpoint["decoder.conv_norm_out.weight"] = vae_state_dict["decoder.norm_out.weight"] new_checkpoint["decoder.conv_norm_out.bias"] = vae_state_dict["decoder.norm_out.bias"] new_checkpoint["quant_conv.weight"] = vae_state_dict["quant_conv.weight"] new_checkpoint["quant_conv.bias"] = vae_state_dict["quant_conv.bias"] new_checkpoint["post_quant_conv.weight"] = vae_state_dict["post_quant_conv.weight"] new_checkpoint["post_quant_conv.bias"] = vae_state_dict["post_quant_conv.bias"] # Retrieves the keys for the encoder down blocks only num_down_blocks = len({".".join(layer.split(".")[:3]) for layer in vae_state_dict if "encoder.down" in layer}) down_blocks = { layer_id: [key for key in vae_state_dict if f"down.{layer_id}" in key] for layer_id in range(num_down_blocks) } # Retrieves the keys for the decoder up blocks only num_up_blocks = len({".".join(layer.split(".")[:3]) for layer in vae_state_dict if "decoder.up" in layer}) up_blocks = { layer_id: [key for key in vae_state_dict if f"up.{layer_id}" in key] for layer_id in range(num_up_blocks) } for i in range(num_down_blocks): resnets = [key for key in down_blocks[i] if f"down.{i}" in key and f"down.{i}.downsample" not in key] if f"encoder.down.{i}.downsample.conv.weight" in vae_state_dict: new_checkpoint[f"encoder.down_blocks.{i}.downsamplers.0.conv.weight"] = vae_state_dict.pop( f"encoder.down.{i}.downsample.conv.weight" ) new_checkpoint[f"encoder.down_blocks.{i}.downsamplers.0.conv.bias"] = vae_state_dict.pop( f"encoder.down.{i}.downsample.conv.bias" ) paths = renew_vae_resnet_paths(resnets) meta_path = {"old": f"down.{i}.block", "new": f"down_blocks.{i}.resnets"} assign_to_checkpoint(paths, new_checkpoint, vae_state_dict, additional_replacements=[meta_path], config=config) mid_resnets = [key for key in vae_state_dict if "encoder.mid.block" in key] num_mid_res_blocks = 2 for i in range(1, num_mid_res_blocks + 1): resnets = [key for key in mid_resnets if f"encoder.mid.block_{i}" in key] paths = renew_vae_resnet_paths(resnets) meta_path = {"old": f"mid.block_{i}", "new": f"mid_block.resnets.{i - 1}"} assign_to_checkpoint(paths, new_checkpoint, vae_state_dict, additional_replacements=[meta_path], config=config) mid_attentions = [key for key in vae_state_dict if "encoder.mid.attn" in key] paths = renew_vae_attention_paths(mid_attentions) meta_path = {"old": "mid.attn_1", "new": "mid_block.attentions.0"} assign_to_checkpoint(paths, new_checkpoint, vae_state_dict, additional_replacements=[meta_path], config=config) conv_attn_to_linear(new_checkpoint) for i in range(num_up_blocks): block_id = num_up_blocks - 1 - i resnets = [ key for key in up_blocks[block_id] if f"up.{block_id}" in key and f"up.{block_id}.upsample" not in key ] if f"decoder.up.{block_id}.upsample.conv.weight" in vae_state_dict: new_checkpoint[f"decoder.up_blocks.{i}.upsamplers.0.conv.weight"] = vae_state_dict[ f"decoder.up.{block_id}.upsample.conv.weight" ] new_checkpoint[f"decoder.up_blocks.{i}.upsamplers.0.conv.bias"] = vae_state_dict[ f"decoder.up.{block_id}.upsample.conv.bias" ] paths = renew_vae_resnet_paths(resnets) meta_path = {"old": f"up.{block_id}.block", "new": f"up_blocks.{i}.resnets"} assign_to_checkpoint(paths, new_checkpoint, vae_state_dict, additional_replacements=[meta_path], config=config) mid_resnets = [key for key in vae_state_dict if "decoder.mid.block" in key] num_mid_res_blocks = 2 for i in range(1, num_mid_res_blocks + 1): resnets = [key for key in mid_resnets if f"decoder.mid.block_{i}" in key] paths = renew_vae_resnet_paths(resnets) meta_path = {"old": f"mid.block_{i}", "new": f"mid_block.resnets.{i - 1}"} assign_to_checkpoint(paths, new_checkpoint, vae_state_dict, additional_replacements=[meta_path], config=config) mid_attentions = [key for key in vae_state_dict if "decoder.mid.attn" in key] paths = renew_vae_attention_paths(mid_attentions) meta_path = {"old": "mid.attn_1", "new": "mid_block.attentions.0"} assign_to_checkpoint(paths, new_checkpoint, vae_state_dict, additional_replacements=[meta_path], config=config) conv_attn_to_linear(new_checkpoint) return new_checkpoint def convert_ldm_bert_checkpoint(checkpoint, config): def _copy_attn_layer(hf_attn_layer, pt_attn_layer): hf_attn_layer.q_proj.weight.data = pt_attn_layer.to_q.weight hf_attn_layer.k_proj.weight.data = pt_attn_layer.to_k.weight hf_attn_layer.v_proj.weight.data = pt_attn_layer.to_v.weight hf_attn_layer.out_proj.weight = pt_attn_layer.to_out.weight hf_attn_layer.out_proj.bias = pt_attn_layer.to_out.bias def _copy_linear(hf_linear, pt_linear): hf_linear.weight = pt_linear.weight hf_linear.bias = pt_linear.bias def _copy_layer(hf_layer, pt_layer): # copy layer norms _copy_linear(hf_layer.self_attn_layer_norm, pt_layer[0][0]) _copy_linear(hf_layer.final_layer_norm, pt_layer[1][0]) # copy attn _copy_attn_layer(hf_layer.self_attn, pt_layer[0][1]) # copy MLP pt_mlp = pt_layer[1][1] _copy_linear(hf_layer.fc1, pt_mlp.net[0][0]) _copy_linear(hf_layer.fc2, pt_mlp.net[2]) def _copy_layers(hf_layers, pt_layers): for i, hf_layer in enumerate(hf_layers): if i != 0: i += i pt_layer = pt_layers[i : i + 2] _copy_layer(hf_layer, pt_layer) hf_model = LDMBertModel(config).eval() # copy embeds hf_model.model.embed_tokens.weight = checkpoint.transformer.token_emb.weight hf_model.model.embed_positions.weight.data = checkpoint.transformer.pos_emb.emb.weight # copy layer norm _copy_linear(hf_model.model.layer_norm, checkpoint.transformer.norm) # copy hidden layers _copy_layers(hf_model.model.layers, checkpoint.transformer.attn_layers.layers) _copy_linear(hf_model.to_logits, checkpoint.transformer.to_logits) return hf_model def convert_ldm_clip_checkpoint(checkpoint, local_files_only=False, text_encoder=None): if text_encoder is None: config_name = "openai/clip-vit-large-patch14" try: config = CLIPTextConfig.from_pretrained(config_name, local_files_only=local_files_only) except Exception: raise ValueError( f"With local_files_only set to {local_files_only}, you must first locally save the configuration in the following path: 'openai/clip-vit-large-patch14'." ) ctx = init_empty_weights if is_accelerate_available() else nullcontext with ctx(): text_model = CLIPTextModel(config) else: text_model = text_encoder keys = list(checkpoint.keys()) text_model_dict = {} remove_prefixes = ["cond_stage_model.transformer", "conditioner.embedders.0.transformer"] for key in keys: for prefix in remove_prefixes: if key.startswith(prefix): text_model_dict[key[len(prefix + ".") :]] = checkpoint[key] if is_accelerate_available(): for param_name, param in text_model_dict.items(): set_module_tensor_to_device(text_model, param_name, "cpu", value=param) else: if not (hasattr(text_model, "embeddings") and hasattr(text_model.embeddings.position_ids)): text_model_dict.pop("text_model.embeddings.position_ids", None) text_model.load_state_dict(text_model_dict) return text_model textenc_conversion_lst = [ ("positional_embedding", "text_model.embeddings.position_embedding.weight"), ("token_embedding.weight", "text_model.embeddings.token_embedding.weight"), ("ln_final.weight", "text_model.final_layer_norm.weight"), ("ln_final.bias", "text_model.final_layer_norm.bias"), ("text_projection", "text_projection.weight"), ] textenc_conversion_map = {x[0]: x[1] for x in textenc_conversion_lst} textenc_transformer_conversion_lst = [ # (stable-diffusion, HF Diffusers) ("resblocks.", "text_model.encoder.layers."), ("ln_1", "layer_norm1"), ("ln_2", "layer_norm2"), (".c_fc.", ".fc1."), (".c_proj.", ".fc2."), (".attn", ".self_attn"), ("ln_final.", "transformer.text_model.final_layer_norm."), ("token_embedding.weight", "transformer.text_model.embeddings.token_embedding.weight"), ("positional_embedding", "transformer.text_model.embeddings.position_embedding.weight"), ] protected = {re.escape(x[0]): x[1] for x in textenc_transformer_conversion_lst} textenc_pattern = re.compile("|".join(protected.keys())) def convert_paint_by_example_checkpoint(checkpoint, local_files_only=False): config = CLIPVisionConfig.from_pretrained("openai/clip-vit-large-patch14", local_files_only=local_files_only) model = PaintByExampleImageEncoder(config) keys = list(checkpoint.keys()) text_model_dict = {} for key in keys: if key.startswith("cond_stage_model.transformer"): text_model_dict[key[len("cond_stage_model.transformer.") :]] = checkpoint[key] # load clip vision model.model.load_state_dict(text_model_dict) # load mapper keys_mapper = { k[len("cond_stage_model.mapper.res") :]: v for k, v in checkpoint.items() if k.startswith("cond_stage_model.mapper") } MAPPING = { "attn.c_qkv": ["attn1.to_q", "attn1.to_k", "attn1.to_v"], "attn.c_proj": ["attn1.to_out.0"], "ln_1": ["norm1"], "ln_2": ["norm3"], "mlp.c_fc": ["ff.net.0.proj"], "mlp.c_proj": ["ff.net.2"], } mapped_weights = {} for key, value in keys_mapper.items(): prefix = key[: len("blocks.i")] suffix = key.split(prefix)[-1].split(".")[-1] name = key.split(prefix)[-1].split(suffix)[0][1:-1] mapped_names = MAPPING[name] num_splits = len(mapped_names) for i, mapped_name in enumerate(mapped_names): new_name = ".".join([prefix, mapped_name, suffix]) shape = value.shape[0] // num_splits mapped_weights[new_name] = value[i * shape : (i + 1) * shape] model.mapper.load_state_dict(mapped_weights) # load final layer norm model.final_layer_norm.load_state_dict( { "bias": checkpoint["cond_stage_model.final_ln.bias"], "weight": checkpoint["cond_stage_model.final_ln.weight"], } ) # load final proj model.proj_out.load_state_dict( { "bias": checkpoint["proj_out.bias"], "weight": checkpoint["proj_out.weight"], } ) # load uncond vector model.uncond_vector.data = torch.nn.Parameter(checkpoint["learnable_vector"]) return model def convert_open_clip_checkpoint( checkpoint, config_name, prefix="cond_stage_model.model.", has_projection=False, local_files_only=False, **config_kwargs, ): # text_model = CLIPTextModel.from_pretrained("stabilityai/stable-diffusion-2", subfolder="text_encoder") # text_model = CLIPTextModelWithProjection.from_pretrained( # "laion/CLIP-ViT-bigG-14-laion2B-39B-b160k", projection_dim=1280 # ) try: config = CLIPTextConfig.from_pretrained(config_name, **config_kwargs, local_files_only=local_files_only) except Exception: raise ValueError( f"With local_files_only set to {local_files_only}, you must first locally save the configuration in the following path: '{config_name}'." ) ctx = init_empty_weights if is_accelerate_available() else nullcontext with ctx(): text_model = CLIPTextModelWithProjection(config) if has_projection else CLIPTextModel(config) keys = list(checkpoint.keys()) keys_to_ignore = [] if config_name == "stabilityai/stable-diffusion-2" and config.num_hidden_layers == 23: # make sure to remove all keys > 22 keys_to_ignore += [k for k in keys if k.startswith("cond_stage_model.model.transformer.resblocks.23")] keys_to_ignore += ["cond_stage_model.model.text_projection"] text_model_dict = {} if prefix + "text_projection" in checkpoint: d_model = int(checkpoint[prefix + "text_projection"].shape[0]) else: d_model = 1024 text_model_dict["text_model.embeddings.position_ids"] = text_model.text_model.embeddings.get_buffer("position_ids") for key in keys: if key in keys_to_ignore: continue if key[len(prefix) :] in textenc_conversion_map: if key.endswith("text_projection"): value = checkpoint[key].T.contiguous() else: value = checkpoint[key] text_model_dict[textenc_conversion_map[key[len(prefix) :]]] = value if key.startswith(prefix + "transformer."): new_key = key[len(prefix + "transformer.") :] if new_key.endswith(".in_proj_weight"): new_key = new_key[: -len(".in_proj_weight")] new_key = textenc_pattern.sub(lambda m: protected[re.escape(m.group(0))], new_key) text_model_dict[new_key + ".q_proj.weight"] = checkpoint[key][:d_model, :] text_model_dict[new_key + ".k_proj.weight"] = checkpoint[key][d_model : d_model * 2, :] text_model_dict[new_key + ".v_proj.weight"] = checkpoint[key][d_model * 2 :, :] elif new_key.endswith(".in_proj_bias"): new_key = new_key[: -len(".in_proj_bias")] new_key = textenc_pattern.sub(lambda m: protected[re.escape(m.group(0))], new_key) text_model_dict[new_key + ".q_proj.bias"] = checkpoint[key][:d_model] text_model_dict[new_key + ".k_proj.bias"] = checkpoint[key][d_model : d_model * 2] text_model_dict[new_key + ".v_proj.bias"] = checkpoint[key][d_model * 2 :] else: new_key = textenc_pattern.sub(lambda m: protected[re.escape(m.group(0))], new_key) text_model_dict[new_key] = checkpoint[key] if is_accelerate_available(): for param_name, param in text_model_dict.items(): set_module_tensor_to_device(text_model, param_name, "cpu", value=param) else: if not (hasattr(text_model, "embeddings") and hasattr(text_model.embeddings.position_ids)): text_model_dict.pop("text_model.embeddings.position_ids", None) text_model.load_state_dict(text_model_dict) return text_model def stable_unclip_image_encoder(original_config, local_files_only=False): """ Returns the image processor and clip image encoder for the img2img unclip pipeline. We currently know of two types of stable unclip models which separately use the clip and the openclip image encoders. """ image_embedder_config = original_config["model"]["params"]["embedder_config"] sd_clip_image_embedder_class = image_embedder_config["target"] sd_clip_image_embedder_class = sd_clip_image_embedder_class.split(".")[-1] if sd_clip_image_embedder_class == "ClipImageEmbedder": clip_model_name = image_embedder_config.params.model if clip_model_name == "ViT-L/14": feature_extractor = CLIPImageProcessor() image_encoder = CLIPVisionModelWithProjection.from_pretrained( "openai/clip-vit-large-patch14", local_files_only=local_files_only ) else: raise NotImplementedError(f"Unknown CLIP checkpoint name in stable diffusion checkpoint {clip_model_name}") elif sd_clip_image_embedder_class == "FrozenOpenCLIPImageEmbedder": feature_extractor = CLIPImageProcessor() image_encoder = CLIPVisionModelWithProjection.from_pretrained( "laion/CLIP-ViT-H-14-laion2B-s32B-b79K", local_files_only=local_files_only ) else: raise NotImplementedError( f"Unknown CLIP image embedder class in stable diffusion checkpoint {sd_clip_image_embedder_class}" ) return feature_extractor, image_encoder def stable_unclip_image_noising_components( original_config, clip_stats_path: Optional[str] = None, device: Optional[str] = None ): """ Returns the noising components for the img2img and txt2img unclip pipelines. Converts the stability noise augmentor into 1. a `StableUnCLIPImageNormalizer` for holding the CLIP stats 2. a `DDPMScheduler` for holding the noise schedule If the noise augmentor config specifies a clip stats path, the `clip_stats_path` must be provided. """ noise_aug_config = original_config["model"]["params"]["noise_aug_config"] noise_aug_class = noise_aug_config["target"] noise_aug_class = noise_aug_class.split(".")[-1] if noise_aug_class == "CLIPEmbeddingNoiseAugmentation": noise_aug_config = noise_aug_config.params embedding_dim = noise_aug_config.timestep_dim max_noise_level = noise_aug_config.noise_schedule_config.timesteps beta_schedule = noise_aug_config.noise_schedule_config.beta_schedule image_normalizer = StableUnCLIPImageNormalizer(embedding_dim=embedding_dim) image_noising_scheduler = DDPMScheduler(num_train_timesteps=max_noise_level, beta_schedule=beta_schedule) if "clip_stats_path" in noise_aug_config: if clip_stats_path is None: raise ValueError("This stable unclip config requires a `clip_stats_path`") clip_mean, clip_std = torch.load(clip_stats_path, map_location=device) clip_mean = clip_mean[None, :] clip_std = clip_std[None, :] clip_stats_state_dict = { "mean": clip_mean, "std": clip_std, } image_normalizer.load_state_dict(clip_stats_state_dict) else: raise NotImplementedError(f"Unknown noise augmentor class: {noise_aug_class}") return image_normalizer, image_noising_scheduler def convert_controlnet_checkpoint( checkpoint, original_config, checkpoint_path, image_size, upcast_attention, extract_ema, use_linear_projection=None, cross_attention_dim=None, ): ctrlnet_config = create_unet_diffusers_config(original_config, image_size=image_size, controlnet=True) ctrlnet_config["upcast_attention"] = upcast_attention ctrlnet_config.pop("sample_size") if use_linear_projection is not None: ctrlnet_config["use_linear_projection"] = use_linear_projection if cross_attention_dim is not None: ctrlnet_config["cross_attention_dim"] = cross_attention_dim ctx = init_empty_weights if is_accelerate_available() else nullcontext with ctx(): controlnet = ControlNetModel(**ctrlnet_config) # Some controlnet ckpt files are distributed independently from the rest of the # model components i.e. https://huggingface.co/thibaud/controlnet-sd21/ if "time_embed.0.weight" in checkpoint: skip_extract_state_dict = True else: skip_extract_state_dict = False converted_ctrl_checkpoint = convert_ldm_unet_checkpoint( checkpoint, ctrlnet_config, path=checkpoint_path, extract_ema=extract_ema, controlnet=True, skip_extract_state_dict=skip_extract_state_dict, ) if is_accelerate_available(): for param_name, param in converted_ctrl_checkpoint.items(): set_module_tensor_to_device(controlnet, param_name, "cpu", value=param) else: controlnet.load_state_dict(converted_ctrl_checkpoint) return controlnet def download_from_original_stable_diffusion_ckpt( checkpoint_path_or_dict: Union[str, Dict[str, torch.Tensor]], original_config_file: str = None, image_size: Optional[int] = None, prediction_type: str = None, model_type: str = None, extract_ema: bool = False, scheduler_type: str = "pndm", num_in_channels: Optional[int] = None, upcast_attention: Optional[bool] = None, device: str = None, from_safetensors: bool = False, stable_unclip: Optional[str] = None, stable_unclip_prior: Optional[str] = None, clip_stats_path: Optional[str] = None, controlnet: Optional[bool] = None, adapter: Optional[bool] = None, load_safety_checker: bool = True, pipeline_class: DiffusionPipeline = None, local_files_only=False, vae_path=None, vae=None, text_encoder=None, text_encoder_2=None, tokenizer=None, tokenizer_2=None, config_files=None, ) -> DiffusionPipeline: """ Load a Stable Diffusion pipeline object from a CompVis-style `.ckpt`/`.safetensors` file and (ideally) a `.yaml` config file. Although many of the arguments can be automatically inferred, some of these rely on brittle checks against the global step count, which will likely fail for models that have undergone further fine-tuning. Therefore, it is recommended that you override the default values and/or supply an `original_config_file` wherever possible. Args: checkpoint_path_or_dict (`str` or `dict`): Path to `.ckpt` file, or the state dict. original_config_file (`str`): Path to `.yaml` config file corresponding to the original architecture. If `None`, will be automatically inferred by looking for a key that only exists in SD2.0 models. image_size (`int`, *optional*, defaults to 512): The image size that the model was trained on. Use 512 for Stable Diffusion v1.X and Stable Diffusion v2 Base. Use 768 for Stable Diffusion v2. prediction_type (`str`, *optional*): The prediction type that the model was trained on. Use `'epsilon'` for Stable Diffusion v1.X and Stable Diffusion v2 Base. Use `'v_prediction'` for Stable Diffusion v2. num_in_channels (`int`, *optional*, defaults to None): The number of input channels. If `None`, it will be automatically inferred. scheduler_type (`str`, *optional*, defaults to 'pndm'): Type of scheduler to use. Should be one of `["pndm", "lms", "heun", "euler", "euler-ancestral", "dpm", "ddim"]`. model_type (`str`, *optional*, defaults to `None`): The pipeline type. `None` to automatically infer, or one of `["FrozenOpenCLIPEmbedder", "FrozenCLIPEmbedder", "PaintByExample"]`. is_img2img (`bool`, *optional*, defaults to `False`): Whether the model should be loaded as an img2img pipeline. extract_ema (`bool`, *optional*, defaults to `False`): Only relevant for checkpoints that have both EMA and non-EMA weights. Whether to extract the EMA weights or not. Defaults to `False`. Pass `True` to extract the EMA weights. EMA weights usually yield higher quality images for inference. Non-EMA weights are usually better to continue fine-tuning. upcast_attention (`bool`, *optional*, defaults to `None`): Whether the attention computation should always be upcasted. This is necessary when running stable diffusion 2.1. device (`str`, *optional*, defaults to `None`): The device to use. Pass `None` to determine automatically. from_safetensors (`str`, *optional*, defaults to `False`): If `checkpoint_path` is in `safetensors` format, load checkpoint with safetensors instead of PyTorch. load_safety_checker (`bool`, *optional*, defaults to `True`): Whether to load the safety checker or not. Defaults to `True`. pipeline_class (`str`, *optional*, defaults to `None`): The pipeline class to use. Pass `None` to determine automatically. local_files_only (`bool`, *optional*, defaults to `False`): Whether or not to only look at local files (i.e., do not try to download the model). vae (`AutoencoderKL`, *optional*, defaults to `None`): Variational Auto-Encoder (VAE) Model to encode and decode images to and from latent representations. If this parameter is `None`, the function will load a new instance of [CLIP] by itself, if needed. text_encoder (`CLIPTextModel`, *optional*, defaults to `None`): An instance of [CLIP](https://huggingface.co/docs/transformers/model_doc/clip#transformers.CLIPTextModel) to use, specifically the [clip-vit-large-patch14](https://huggingface.co/openai/clip-vit-large-patch14) variant. If this parameter is `None`, the function will load a new instance of [CLIP] by itself, if needed. tokenizer (`CLIPTokenizer`, *optional*, defaults to `None`): An instance of [CLIPTokenizer](https://huggingface.co/docs/transformers/v4.21.0/en/model_doc/clip#transformers.CLIPTokenizer) to use. If this parameter is `None`, the function will load a new instance of [CLIPTokenizer] by itself, if needed. config_files (`Dict[str, str]`, *optional*, defaults to `None`): A dictionary mapping from config file names to their contents. If this parameter is `None`, the function will load the config files by itself, if needed. Valid keys are: - `v1`: Config file for Stable Diffusion v1 - `v2`: Config file for Stable Diffusion v2 - `xl`: Config file for Stable Diffusion XL - `xl_refiner`: Config file for Stable Diffusion XL Refiner return: A StableDiffusionPipeline object representing the passed-in `.ckpt`/`.safetensors` file. """ # import pipelines here to avoid circular import error when using from_single_file method from diffusers import ( LDMTextToImagePipeline, PaintByExamplePipeline, StableDiffusionControlNetPipeline, StableDiffusionInpaintPipeline, StableDiffusionPipeline, StableDiffusionUpscalePipeline, StableDiffusionXLControlNetInpaintPipeline, StableDiffusionXLImg2ImgPipeline, StableDiffusionXLInpaintPipeline, StableDiffusionXLPipeline, StableUnCLIPImg2ImgPipeline, StableUnCLIPPipeline, ) if prediction_type == "v-prediction": prediction_type = "v_prediction" if isinstance(checkpoint_path_or_dict, str): if from_safetensors: from safetensors.torch import load_file as safe_load checkpoint = safe_load(checkpoint_path_or_dict, device="cpu") else: if device is None: device = "cuda" if torch.cuda.is_available() else "cpu" checkpoint = torch.load(checkpoint_path_or_dict, map_location=device) else: checkpoint = torch.load(checkpoint_path_or_dict, map_location=device) elif isinstance(checkpoint_path_or_dict, dict): checkpoint = checkpoint_path_or_dict # Sometimes models don't have the global_step item if "global_step" in checkpoint: global_step = checkpoint["global_step"] else: logger.debug("global_step key not found in model") global_step = None # NOTE: this while loop isn't great but this controlnet checkpoint has one additional # "state_dict" key https://huggingface.co/thibaud/controlnet-canny-sd21 while "state_dict" in checkpoint: checkpoint = checkpoint["state_dict"] if original_config_file is None: key_name_v2_1 = "model.diffusion_model.input_blocks.2.1.transformer_blocks.0.attn2.to_k.weight" key_name_sd_xl_base = "conditioner.embedders.1.model.transformer.resblocks.9.mlp.c_proj.bias" key_name_sd_xl_refiner = "conditioner.embedders.0.model.transformer.resblocks.9.mlp.c_proj.bias" is_upscale = pipeline_class == StableDiffusionUpscalePipeline config_url = None # model_type = "v1" if config_files is not None and "v1" in config_files: original_config_file = config_files["v1"] else: config_url = "https://raw.githubusercontent.com/CompVis/stable-diffusion/main/configs/stable-diffusion/v1-inference.yaml" if key_name_v2_1 in checkpoint and checkpoint[key_name_v2_1].shape[-1] == 1024: # model_type = "v2" if config_files is not None and "v2" in config_files: original_config_file = config_files["v2"] else: config_url = "https://raw.githubusercontent.com/Stability-AI/stablediffusion/main/configs/stable-diffusion/v2-inference-v.yaml" if global_step == 110000: # v2.1 needs to upcast attention upcast_attention = True elif key_name_sd_xl_base in checkpoint: # only base xl has two text embedders if config_files is not None and "xl" in config_files: original_config_file = config_files["xl"] else: config_url = "https://raw.githubusercontent.com/Stability-AI/generative-models/main/configs/inference/sd_xl_base.yaml" elif key_name_sd_xl_refiner in checkpoint: # only refiner xl has embedder and one text embedders if config_files is not None and "xl_refiner" in config_files: original_config_file = config_files["xl_refiner"] else: config_url = "https://raw.githubusercontent.com/Stability-AI/generative-models/main/configs/inference/sd_xl_refiner.yaml" if is_upscale: config_url = "https://raw.githubusercontent.com/Stability-AI/stablediffusion/main/configs/stable-diffusion/x4-upscaling.yaml" if config_url is not None: original_config_file = BytesIO(requests.get(config_url).content) else: with open(original_config_file, "r") as f: original_config_file = f.read() else: with open(original_config_file, "r") as f: original_config_file = f.read() original_config = yaml.safe_load(original_config_file) # Convert the text model. if ( model_type is None and "cond_stage_config" in original_config["model"]["params"] and original_config["model"]["params"]["cond_stage_config"] is not None ): model_type = original_config["model"]["params"]["cond_stage_config"]["target"].split(".")[-1] logger.debug(f"no `model_type` given, `model_type` inferred as: {model_type}") elif model_type is None and original_config["model"]["params"]["network_config"] is not None: if original_config["model"]["params"]["network_config"]["params"]["context_dim"] == 2048: model_type = "SDXL" else: model_type = "SDXL-Refiner" if image_size is None: image_size = 1024 if pipeline_class is None: # Check if we have a SDXL or SD model and initialize default pipeline if model_type not in ["SDXL", "SDXL-Refiner"]: pipeline_class = StableDiffusionPipeline if not controlnet else StableDiffusionControlNetPipeline else: pipeline_class = StableDiffusionXLPipeline if model_type == "SDXL" else StableDiffusionXLImg2ImgPipeline if num_in_channels is None and pipeline_class in [ StableDiffusionInpaintPipeline, StableDiffusionXLInpaintPipeline, StableDiffusionXLControlNetInpaintPipeline, ]: num_in_channels = 9 if num_in_channels is None and pipeline_class == StableDiffusionUpscalePipeline: num_in_channels = 7 elif num_in_channels is None: num_in_channels = 4 if "unet_config" in original_config["model"]["params"]: original_config["model"]["params"]["unet_config"]["params"]["in_channels"] = num_in_channels if ( "parameterization" in original_config["model"]["params"] and original_config["model"]["params"]["parameterization"] == "v" ): if prediction_type is None: # NOTE: For stable diffusion 2 base it is recommended to pass `prediction_type=="epsilon"` # as it relies on a brittle global step parameter here prediction_type = "epsilon" if global_step == 875000 else "v_prediction" if image_size is None: # NOTE: For stable diffusion 2 base one has to pass `image_size==512` # as it relies on a brittle global step parameter here image_size = 512 if global_step == 875000 else 768 else: if prediction_type is None: prediction_type = "epsilon" if image_size is None: image_size = 512 if controlnet is None and "control_stage_config" in original_config["model"]["params"]: path = checkpoint_path_or_dict if isinstance(checkpoint_path_or_dict, str) else "" controlnet = convert_controlnet_checkpoint( checkpoint, original_config, path, image_size, upcast_attention, extract_ema ) if "timesteps" in original_config["model"]["params"]: num_train_timesteps = original_config["model"]["params"]["timesteps"] else: num_train_timesteps = 1000 if model_type in ["SDXL", "SDXL-Refiner"]: scheduler_dict = { "beta_schedule": "scaled_linear", "beta_start": 0.00085, "beta_end": 0.012, "interpolation_type": "linear", "num_train_timesteps": num_train_timesteps, "prediction_type": "epsilon", "sample_max_value": 1.0, "set_alpha_to_one": False, "skip_prk_steps": True, "steps_offset": 1, "timestep_spacing": "leading", } scheduler = EulerDiscreteScheduler.from_config(scheduler_dict) scheduler_type = "euler" else: if "linear_start" in original_config["model"]["params"]: beta_start = original_config["model"]["params"]["linear_start"] else: beta_start = 0.02 if "linear_end" in original_config["model"]["params"]: beta_end = original_config["model"]["params"]["linear_end"] else: beta_end = 0.085 scheduler = DDIMScheduler( beta_end=beta_end, beta_schedule="scaled_linear", beta_start=beta_start, num_train_timesteps=num_train_timesteps, steps_offset=1, clip_sample=False, set_alpha_to_one=False, prediction_type=prediction_type, ) # make sure scheduler works correctly with DDIM scheduler.register_to_config(clip_sample=False) if scheduler_type == "pndm": config = dict(scheduler.config) config["skip_prk_steps"] = True scheduler = PNDMScheduler.from_config(config) elif scheduler_type == "lms": scheduler = LMSDiscreteScheduler.from_config(scheduler.config) elif scheduler_type == "heun": scheduler = HeunDiscreteScheduler.from_config(scheduler.config) elif scheduler_type == "euler": scheduler = EulerDiscreteScheduler.from_config(scheduler.config) elif scheduler_type == "euler-ancestral": scheduler = EulerAncestralDiscreteScheduler.from_config(scheduler.config) elif scheduler_type == "dpm": scheduler = DPMSolverMultistepScheduler.from_config(scheduler.config) elif scheduler_type == "ddim": scheduler = scheduler else: raise ValueError(f"Scheduler of type {scheduler_type} doesn't exist!") if pipeline_class == StableDiffusionUpscalePipeline: image_size = original_config["model"]["params"]["unet_config"]["params"]["image_size"] # Convert the UNet2DConditionModel model. unet_config = create_unet_diffusers_config(original_config, image_size=image_size) unet_config["upcast_attention"] = upcast_attention path = checkpoint_path_or_dict if isinstance(checkpoint_path_or_dict, str) else "" converted_unet_checkpoint = convert_ldm_unet_checkpoint( checkpoint, unet_config, path=path, extract_ema=extract_ema ) ctx = init_empty_weights if is_accelerate_available() else nullcontext with ctx(): unet = UNet2DConditionModel(**unet_config) if is_accelerate_available(): if model_type not in ["SDXL", "SDXL-Refiner"]: # SBM Delay this. for param_name, param in converted_unet_checkpoint.items(): set_module_tensor_to_device(unet, param_name, "cpu", value=param) else: unet.load_state_dict(converted_unet_checkpoint) # Convert the VAE model. if vae_path is None and vae is None: vae_config = create_vae_diffusers_config(original_config, image_size=image_size) converted_vae_checkpoint = convert_ldm_vae_checkpoint(checkpoint, vae_config) if ( "model" in original_config and "params" in original_config["model"] and "scale_factor" in original_config["model"]["params"] ): vae_scaling_factor = original_config["model"]["params"]["scale_factor"] else: vae_scaling_factor = 0.18215 # default SD scaling factor vae_config["scaling_factor"] = vae_scaling_factor ctx = init_empty_weights if is_accelerate_available() else nullcontext with ctx(): vae = AutoencoderKL(**vae_config) if is_accelerate_available(): for param_name, param in converted_vae_checkpoint.items(): set_module_tensor_to_device(vae, param_name, "cpu", value=param) else: vae.load_state_dict(converted_vae_checkpoint) elif vae is None: vae = AutoencoderKL.from_pretrained(vae_path, local_files_only=local_files_only) if model_type == "FrozenOpenCLIPEmbedder": config_name = "stabilityai/stable-diffusion-2" config_kwargs = {"subfolder": "text_encoder"} if text_encoder is None: text_model = convert_open_clip_checkpoint( checkpoint, config_name, local_files_only=local_files_only, **config_kwargs ) else: text_model = text_encoder try: tokenizer = CLIPTokenizer.from_pretrained( "stabilityai/stable-diffusion-2", subfolder="tokenizer", local_files_only=local_files_only ) except Exception: raise ValueError( f"With local_files_only set to {local_files_only}, you must first locally save the tokenizer in the following path: 'stabilityai/stable-diffusion-2'." ) if stable_unclip is None: if controlnet: pipe = pipeline_class( vae=vae, text_encoder=text_model, tokenizer=tokenizer, unet=unet, scheduler=scheduler, controlnet=controlnet, safety_checker=None, feature_extractor=None, ) if hasattr(pipe, "requires_safety_checker"): pipe.requires_safety_checker = False elif pipeline_class == StableDiffusionUpscalePipeline: scheduler = DDIMScheduler.from_pretrained( "stabilityai/stable-diffusion-x4-upscaler", subfolder="scheduler" ) low_res_scheduler = DDPMScheduler.from_pretrained( "stabilityai/stable-diffusion-x4-upscaler", subfolder="low_res_scheduler" ) pipe = pipeline_class( vae=vae, text_encoder=text_model, tokenizer=tokenizer, unet=unet, scheduler=scheduler, low_res_scheduler=low_res_scheduler, safety_checker=None, feature_extractor=None, ) else: pipe = pipeline_class( vae=vae, text_encoder=text_model, tokenizer=tokenizer, unet=unet, scheduler=scheduler, safety_checker=None, feature_extractor=None, ) if hasattr(pipe, "requires_safety_checker"): pipe.requires_safety_checker = False else: image_normalizer, image_noising_scheduler = stable_unclip_image_noising_components( original_config, clip_stats_path=clip_stats_path, device=device ) if stable_unclip == "img2img": feature_extractor, image_encoder = stable_unclip_image_encoder(original_config) pipe = StableUnCLIPImg2ImgPipeline( # image encoding components feature_extractor=feature_extractor, image_encoder=image_encoder, # image noising components image_normalizer=image_normalizer, image_noising_scheduler=image_noising_scheduler, # regular denoising components tokenizer=tokenizer, text_encoder=text_model, unet=unet, scheduler=scheduler, # vae vae=vae, ) elif stable_unclip == "txt2img": if stable_unclip_prior is None or stable_unclip_prior == "karlo": karlo_model = "kakaobrain/karlo-v1-alpha" prior = PriorTransformer.from_pretrained( karlo_model, subfolder="prior", local_files_only=local_files_only ) try: prior_tokenizer = CLIPTokenizer.from_pretrained( "openai/clip-vit-large-patch14", local_files_only=local_files_only ) except Exception: raise ValueError( f"With local_files_only set to {local_files_only}, you must first locally save the tokenizer in the following path: 'openai/clip-vit-large-patch14'." ) prior_text_model = CLIPTextModelWithProjection.from_pretrained( "openai/clip-vit-large-patch14", local_files_only=local_files_only ) prior_scheduler = UnCLIPScheduler.from_pretrained( karlo_model, subfolder="prior_scheduler", local_files_only=local_files_only ) prior_scheduler = DDPMScheduler.from_config(prior_scheduler.config) else: raise NotImplementedError(f"unknown prior for stable unclip model: {stable_unclip_prior}") pipe = StableUnCLIPPipeline( # prior components prior_tokenizer=prior_tokenizer, prior_text_encoder=prior_text_model, prior=prior, prior_scheduler=prior_scheduler, # image noising components image_normalizer=image_normalizer, image_noising_scheduler=image_noising_scheduler, # regular denoising components tokenizer=tokenizer, text_encoder=text_model, unet=unet, scheduler=scheduler, # vae vae=vae, ) else: raise NotImplementedError(f"unknown `stable_unclip` type: {stable_unclip}") elif model_type == "PaintByExample": vision_model = convert_paint_by_example_checkpoint(checkpoint) try: tokenizer = CLIPTokenizer.from_pretrained( "openai/clip-vit-large-patch14", local_files_only=local_files_only ) except Exception: raise ValueError( f"With local_files_only set to {local_files_only}, you must first locally save the tokenizer in the following path: 'openai/clip-vit-large-patch14'." ) try: feature_extractor = AutoFeatureExtractor.from_pretrained( "CompVis/stable-diffusion-safety-checker", local_files_only=local_files_only ) except Exception: raise ValueError( f"With local_files_only set to {local_files_only}, you must first locally save the feature_extractor in the following path: 'CompVis/stable-diffusion-safety-checker'." ) pipe = PaintByExamplePipeline( vae=vae, image_encoder=vision_model, unet=unet, scheduler=scheduler, safety_checker=None, feature_extractor=feature_extractor, ) elif model_type == "FrozenCLIPEmbedder": text_model = convert_ldm_clip_checkpoint( checkpoint, local_files_only=local_files_only, text_encoder=text_encoder ) try: tokenizer = ( CLIPTokenizer.from_pretrained("openai/clip-vit-large-patch14", local_files_only=local_files_only) if tokenizer is None else tokenizer ) except Exception: raise ValueError( f"With local_files_only set to {local_files_only}, you must first locally save the tokenizer in the following path: 'openai/clip-vit-large-patch14'." ) if load_safety_checker: safety_checker = StableDiffusionSafetyChecker.from_pretrained( "CompVis/stable-diffusion-safety-checker", local_files_only=local_files_only ) feature_extractor = AutoFeatureExtractor.from_pretrained( "CompVis/stable-diffusion-safety-checker", local_files_only=local_files_only ) else: safety_checker = None feature_extractor = None if controlnet: pipe = pipeline_class( vae=vae, text_encoder=text_model, tokenizer=tokenizer, unet=unet, controlnet=controlnet, scheduler=scheduler, safety_checker=safety_checker, feature_extractor=feature_extractor, ) else: pipe = pipeline_class( vae=vae, text_encoder=text_model, tokenizer=tokenizer, unet=unet, scheduler=scheduler, safety_checker=safety_checker, feature_extractor=feature_extractor, ) elif model_type in ["SDXL", "SDXL-Refiner"]: is_refiner = model_type == "SDXL-Refiner" if (is_refiner is False) and (tokenizer is None): try: tokenizer = CLIPTokenizer.from_pretrained( "openai/clip-vit-large-patch14", local_files_only=local_files_only ) except Exception: raise ValueError( f"With local_files_only set to {local_files_only}, you must first locally save the tokenizer in the following path: 'openai/clip-vit-large-patch14'." ) if (is_refiner is False) and (text_encoder is None): text_encoder = convert_ldm_clip_checkpoint(checkpoint, local_files_only=local_files_only) if tokenizer_2 is None: try: tokenizer_2 = CLIPTokenizer.from_pretrained( "laion/CLIP-ViT-bigG-14-laion2B-39B-b160k", pad_token="!", local_files_only=local_files_only ) except Exception: raise ValueError( f"With local_files_only set to {local_files_only}, you must first locally save the tokenizer in the following path: 'laion/CLIP-ViT-bigG-14-laion2B-39B-b160k' with `pad_token` set to '!'." ) if text_encoder_2 is None: config_name = "laion/CLIP-ViT-bigG-14-laion2B-39B-b160k" config_kwargs = {"projection_dim": 1280} prefix = "conditioner.embedders.0.model." if is_refiner else "conditioner.embedders.1.model." text_encoder_2 = convert_open_clip_checkpoint( checkpoint, config_name, prefix=prefix, has_projection=True, local_files_only=local_files_only, **config_kwargs, ) if is_accelerate_available(): # SBM Now move model to cpu. for param_name, param in converted_unet_checkpoint.items(): set_module_tensor_to_device(unet, param_name, "cpu", value=param) if controlnet: pipe = pipeline_class( vae=vae, text_encoder=text_encoder, tokenizer=tokenizer, text_encoder_2=text_encoder_2, tokenizer_2=tokenizer_2, unet=unet, controlnet=controlnet, scheduler=scheduler, force_zeros_for_empty_prompt=True, ) elif adapter: pipe = pipeline_class( vae=vae, text_encoder=text_encoder, tokenizer=tokenizer, text_encoder_2=text_encoder_2, tokenizer_2=tokenizer_2, unet=unet, adapter=adapter, scheduler=scheduler, force_zeros_for_empty_prompt=True, ) else: pipeline_kwargs = { "vae": vae, "text_encoder": text_encoder, "tokenizer": tokenizer, "text_encoder_2": text_encoder_2, "tokenizer_2": tokenizer_2, "unet": unet, "scheduler": scheduler, } if (pipeline_class == StableDiffusionXLImg2ImgPipeline) or ( pipeline_class == StableDiffusionXLInpaintPipeline ): pipeline_kwargs.update({"requires_aesthetics_score": is_refiner}) if is_refiner: pipeline_kwargs.update({"force_zeros_for_empty_prompt": False}) pipe = pipeline_class(**pipeline_kwargs) else: text_config = create_ldm_bert_config(original_config) text_model = convert_ldm_bert_checkpoint(checkpoint, text_config) tokenizer = BertTokenizerFast.from_pretrained("bert-base-uncased", local_files_only=local_files_only) pipe = LDMTextToImagePipeline(vqvae=vae, bert=text_model, tokenizer=tokenizer, unet=unet, scheduler=scheduler) return pipe def download_controlnet_from_original_ckpt( checkpoint_path: str, original_config_file: str, image_size: int = 512, extract_ema: bool = False, num_in_channels: Optional[int] = None, upcast_attention: Optional[bool] = None, device: str = None, from_safetensors: bool = False, use_linear_projection: Optional[bool] = None, cross_attention_dim: Optional[bool] = None, ) -> DiffusionPipeline: if from_safetensors: from safetensors import safe_open checkpoint = {} with safe_open(checkpoint_path, framework="pt", device="cpu") as f: for key in f.keys(): checkpoint[key] = f.get_tensor(key) else: if device is None: device = "cuda" if torch.cuda.is_available() else "cpu" checkpoint = torch.load(checkpoint_path, map_location=device) else: checkpoint = torch.load(checkpoint_path, map_location=device) # NOTE: this while loop isn't great but this controlnet checkpoint has one additional # "state_dict" key https://huggingface.co/thibaud/controlnet-canny-sd21 while "state_dict" in checkpoint: checkpoint = checkpoint["state_dict"] original_config = yaml.safe_load(original_config_file) if num_in_channels is not None: original_config["model"]["params"]["unet_config"]["params"]["in_channels"] = num_in_channels if "control_stage_config" not in original_config["model"]["params"]: raise ValueError("`control_stage_config` not present in original config") controlnet = convert_controlnet_checkpoint( checkpoint, original_config, checkpoint_path, image_size, upcast_attention, extract_ema, use_linear_projection=use_linear_projection, cross_attention_dim=cross_attention_dim, ) return controlnet