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Convert original Stable Diffusion checkpoints and safetensors to diffusers

Stable Diffusion model conversion script

Convert from the 'original implementation' to Huggingface diffusers. Both .safetensors and .ckpt checkpoints are supported.

The script is adapted from the diffusers conversion script: https://github.com/huggingface/diffusers/blob/main/scripts/convert_original_stable_diffusion_to_diffusers.py

Usage:

python enhanced_convert_original_stable_diffusion_to_diffusers.py --checkpoint_path "<input_model_filepath>" --dump_path "<output_directory_path>" --extract_ema

For inference use, extracting with --extract_ema is usually recommended. This will be ignored if the source model does not contain both EMA and non-EMA weights.

A workaround for the following error is implemented:

RuntimeError: Error(s) in loading state_dict for UNet2DConditionModel:
        Missing key(s) in state_dict: "up_blocks.0.upsamplers.0.conv.weight", "up_blocks.0.upsamplers.0.conv.bias", "up_blocks.1.upsamplers.0.conv.weight", "up_blocks.1.upsamplers.0.conv.bias", "up_blocks.2.upsamplers.0.conv.weight", "up_blocks.2.upsamplers.0.conv.bias".
        Unexpected key(s) in state_dict: "up_blocks.0.attentions.2.conv.bias", "up_blocks.0.attentions.2.conv.weight".

This has been found to occur when converting some models, especially models that were distributed in a safetensors format.

To extract and re-add missing keys of the state dictionary from the original model, the key map from https://github.com/ratwithacompiler/diffusers_stablediff_conversion/blob/main/convert_diffusers_to_sd.py was used.

In case of problems with other UNET keys, lines 911 and 913 of the script can be extended:

  • missing_diffusers_keys_unet will retrieve and amend any diffusers UNET keys (for keys reported as Missing key(s) in state_dict).
  • unwanted_diffusers_keys_unet will remove any unwanted keys (for keys reported as Unexpected key(s) in state_dict).
# coding=utf-8
# Copyright 2022 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 LDM checkpoints. """
# Modified with a workaround for safetensors support and UNET state_dict problems.
import argparse
import os
import re
import torch
try:
from omegaconf import OmegaConf
except ImportError:
raise ImportError(
"OmegaConf is required to convert the LDM checkpoints. Please install it with `pip install OmegaConf`."
)
from diffusers import (
AutoencoderKL,
DDIMScheduler,
#DPMSolverMultistepScheduler,
#EulerAncestralDiscreteScheduler,
EulerDiscreteScheduler,
#HeunDiscreteScheduler,
LDMTextToImagePipeline,
LMSDiscreteScheduler,
PNDMScheduler,
StableDiffusionPipeline,
UNet2DConditionModel,
)
from diffusers.pipelines.latent_diffusion.pipeline_latent_diffusion import LDMBertConfig, LDMBertModel
#from diffusers.pipelines.paint_by_example import PaintByExampleImageEncoder, PaintByExamplePipeline
from diffusers.pipelines.stable_diffusion import StableDiffusionSafetyChecker
from transformers import AutoFeatureExtractor, BertTokenizerFast, CLIPTextModel, CLIPTokenizer, CLIPVisionConfig
from safetensors.torch import load_file
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", "query.weight")
new_item = new_item.replace("q.bias", "query.bias")
new_item = new_item.replace("k.weight", "key.weight")
new_item = new_item.replace("k.bias", "key.bias")
new_item = new_item.replace("v.weight", "value.weight")
new_item = new_item.replace("v.bias", "value.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 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
if "proj_attn.weight" in new_path:
checkpoint[new_path] = old_checkpoint[path["old"]][:, :, 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):
"""
Creates a config for the diffusers based on the config of the LDM model.
"""
unet_params = original_config.model.params.unet_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
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 = [5, 10, 20, 20]
config = dict(
sample_size=image_size // vae_scale_factor,
in_channels=unet_params.in_channels,
out_channels=unet_params.out_channels,
down_block_types=tuple(down_block_types),
up_block_types=tuple(up_block_types),
block_out_channels=tuple(block_out_channels),
layers_per_block=unet_params.num_res_blocks,
cross_attention_dim=unet_params.context_dim,
attention_head_dim=head_dim,
use_linear_projection=use_linear_projection,
)
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 = dict(
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.parms.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):
"""
Takes a state dict and a config, and returns a converted checkpoint.
"""
# extract state_dict for UNet
unet_state_dict = {}
keys = list(checkpoint.keys())
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:
print(f"Checkpoint {path} has both EMA and non-EMA weights.")
if extract_ema:
print(
"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:
print(
"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"]
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"]
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
)
if ["conv.weight", "conv.bias"] in output_block_list.values():
index = list(output_block_list.values()).index(["conv.weight", "conv.bias"])
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]
return new_checkpoint
def convert_ldm_vae_checkpoint(checkpoint, config):
# extract state dict for VAE
vae_state_dict = {}
vae_key = "first_stage_model."
keys = list(checkpoint.keys())
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):
text_model = CLIPTextModel.from_pretrained("openai/clip-vit-large-patch14")
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]
text_model.load_state_dict(text_model_dict)
return text_model
textenc_conversion_lst = [
("cond_stage_model.model.positional_embedding", "text_model.embeddings.position_embedding.weight"),
("cond_stage_model.model.token_embedding.weight", "text_model.embeddings.token_embedding.weight"),
("cond_stage_model.model.ln_final.weight", "text_model.final_layer_norm.weight"),
("cond_stage_model.model.ln_final.bias", "text_model.final_layer_norm.bias"),
]
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):
config = CLIPVisionConfig.from_pretrained("openai/clip-vit-large-patch14")
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):
text_model = CLIPTextModel.from_pretrained("stabilityai/stable-diffusion-2", subfolder="text_encoder")
keys = list(checkpoint.keys())
text_model_dict = {}
d_model = int(checkpoint["cond_stage_model.model.text_projection"].shape[0])
text_model_dict["text_model.embeddings.position_ids"] = text_model.text_model.embeddings.get_buffer("position_ids")
for key in keys:
if "resblocks.23" in key: # Diffusers drops the final layer and only uses the penultimate layer
continue
if key in textenc_conversion_map:
text_model_dict[textenc_conversion_map[key]] = checkpoint[key]
if key.startswith("cond_stage_model.model.transformer."):
new_key = key[len("cond_stage_model.model.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]
text_model.load_state_dict(text_model_dict)
return text_model
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument(
"--checkpoint_path", default=None, type=str, required=True, help="Path to the checkpoint to convert."
)
# !wget https://raw.githubusercontent.com/CompVis/stable-diffusion/main/configs/stable-diffusion/v1-inference.yaml
parser.add_argument(
"--original_config_file",
default=None,
type=str,
help="The YAML config file corresponding to the original architecture.",
)
parser.add_argument(
"--num_in_channels",
default=None,
type=int,
help="The number of input channels. If `None` number of input channels will be automatically inferred.",
)
parser.add_argument(
"--scheduler_type",
default="pndm",
type=str,
help="Type of scheduler to use. Should be one of ['pndm', 'lms', 'ddim', 'euler', 'euler-ancestral', 'dpm']",
)
parser.add_argument(
"--pipeline_type",
default=None,
type=str,
help="The pipeline type. If `None` pipeline will be automatically inferred.",
)
parser.add_argument(
"--image_size",
default=None,
type=int,
help=(
"The image size that the model was trained on. Use 512 for Stable Diffusion v1.X and Stable Siffusion v2"
" Base. Use 768 for Stable Diffusion v2."
),
)
parser.add_argument(
"--prediction_type",
default=None,
type=str,
help=(
"The prediction type that the model was trained on. Use 'epsilon' for Stable Diffusion v1.X and Stable"
" Siffusion v2 Base. Use 'v-prediction' for Stable Diffusion v2."
),
)
parser.add_argument(
"--extract_ema",
action="store_true",
help=(
"Only relevant for checkpoints that have both EMA and non-EMA weights. Whether to extract the EMA weights"
" or not. Defaults to `False`. Add `--extract_ema` to extract the EMA weights. EMA weights usually yield"
" higher quality images for inference. Non-EMA weights are usually better to continue fine-tuning."
),
)
parser.add_argument(
"--upcast_attn",
default=False,
type=bool,
help=(
"Whether the attention computation should always be upcasted. This is necessary when running stable"
" diffusion 2.1."
),
)
parser.add_argument("--dump_path", default=None, type=str, required=True, help="Path to the output model.")
args = parser.parse_args()
image_size = args.image_size
prediction_type = args.prediction_type
if not os.path.isfile(args.checkpoint_path):
print(f"Could not find a file at {args.checkpoint_path}")
exit(-1)
try:
checkpoint = load_file(args.checkpoint_path)
except Exception as e:
print(e)
while True:
print("""
######## WARNING: ########
Model did not load as a safetensor. Loading directly via torch.load() may be possible (and required for .ckpts), but carries a security risk!
Unless you are certain that you can trust the source, or have taken necessary precautions and are converting this in an isolated, unprivileged and disposable environment, proceeding is not recommended.
You may want to safely inspect and sanitize the contents of the file first.
"""
)
user_in = input("Are you sure? Type 'y' or 'yes' to proceed, or type 'n' or 'no' (or exit the script) to abort conversion. >>> ").lower().strip()
if user_in in ["n","no"]:
exit(-1)
if user_in in ["y","yes"]:
print("Proceeding.")
break
checkpoint = torch.load(args.checkpoint_path)
# Sometimes models don't have the global_step item
if "global_step" in checkpoint:
global_step = checkpoint["global_step"]
else:
print("global_step key not found in model")
global_step = None
chckpoint_dict_replacements = {
'cond_stage_model.transformer.embeddings.': 'cond_stage_model.transformer.text_model.embeddings.',
'cond_stage_model.transformer.encoder.': 'cond_stage_model.transformer.text_model.encoder.',
'cond_stage_model.transformer.final_layer_norm.': 'cond_stage_model.transformer.text_model.final_layer_norm.',
}
def transform_checkpoint_dict_key(k):
for text, replacement in chckpoint_dict_replacements.items():
if k.startswith(text):
k = replacement + k[len(text):]
return k
def shared_pointers(tensors):
from collections import defaultdict
ptrs = defaultdict(list)
for k, v in tensors.items():
ptrs[v.data_ptr()].append(k)
failing = []
for ptr, names in ptrs.items():
if len(names) > 1:
failing.append(names)
return failing
# https://github.com/ratwithacompiler/diffusers_stablediff_conversion/blob/main/convert_diffusers_to_sd.py "original SD key" -> "Diffusers key" Keymap for repairs. "yes this is horrid".
KeyMap = { "model.diffusion_model.time_embed.0.weight": "time_embedding.linear_1.weight", "model.diffusion_model.time_embed.0.bias": "time_embedding.linear_1.bias", "model.diffusion_model.time_embed.2.weight": "time_embedding.linear_2.weight", "model.diffusion_model.time_embed.2.bias": "time_embedding.linear_2.bias", "model.diffusion_model.input_blocks.0.0.weight": "conv_in.weight", "model.diffusion_model.input_blocks.0.0.bias": "conv_in.bias", "model.diffusion_model.out.0.weight": "conv_norm_out.weight", "model.diffusion_model.out.0.bias": "conv_norm_out.bias", "model.diffusion_model.out.2.weight": "conv_out.weight", "model.diffusion_model.out.2.bias": "conv_out.bias", "model.diffusion_model.input_blocks.1.0.in_layers.0.weight": "down_blocks.0.resnets.0.norm1.weight", "model.diffusion_model.input_blocks.1.0.in_layers.0.bias": "down_blocks.0.resnets.0.norm1.bias", "model.diffusion_model.input_blocks.1.0.in_layers.2.weight": "down_blocks.0.resnets.0.conv1.weight", "model.diffusion_model.input_blocks.1.0.in_layers.2.bias": "down_blocks.0.resnets.0.conv1.bias", "model.diffusion_model.input_blocks.1.0.emb_layers.1.weight": "down_blocks.0.resnets.0.time_emb_proj.weight", "model.diffusion_model.input_blocks.1.0.emb_layers.1.bias": "down_blocks.0.resnets.0.time_emb_proj.bias", "model.diffusion_model.input_blocks.1.0.out_layers.0.weight": "down_blocks.0.resnets.0.norm2.weight", "model.diffusion_model.input_blocks.1.0.out_layers.0.bias": "down_blocks.0.resnets.0.norm2.bias", "model.diffusion_model.input_blocks.1.0.out_layers.3.weight": "down_blocks.0.resnets.0.conv2.weight", "model.diffusion_model.input_blocks.1.0.out_layers.3.bias": "down_blocks.0.resnets.0.conv2.bias", "model.diffusion_model.input_blocks.1.1.norm.weight": "down_blocks.0.attentions.0.norm.weight", "model.diffusion_model.input_blocks.1.1.norm.bias": "down_blocks.0.attentions.0.norm.bias", "model.diffusion_model.input_blocks.1.1.proj_in.weight": "down_blocks.0.attentions.0.proj_in.weight", "model.diffusion_model.input_blocks.1.1.proj_in.bias": "down_blocks.0.attentions.0.proj_in.bias", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.attn1.to_q.weight": "down_blocks.0.attentions.0.transformer_blocks.0.attn1.to_q.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.attn1.to_k.weight": "down_blocks.0.attentions.0.transformer_blocks.0.attn1.to_k.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.attn1.to_v.weight": "down_blocks.0.attentions.0.transformer_blocks.0.attn1.to_v.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.attn1.to_out.0.weight": "down_blocks.0.attentions.0.transformer_blocks.0.attn1.to_out.0.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.attn1.to_out.0.bias": "down_blocks.0.attentions.0.transformer_blocks.0.attn1.to_out.0.bias", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.ff.net.0.proj.weight": "down_blocks.0.attentions.0.transformer_blocks.0.ff.net.0.proj.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.ff.net.0.proj.bias": "down_blocks.0.attentions.0.transformer_blocks.0.ff.net.0.proj.bias", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.ff.net.2.weight": "down_blocks.0.attentions.0.transformer_blocks.0.ff.net.2.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.ff.net.2.bias": "down_blocks.0.attentions.0.transformer_blocks.0.ff.net.2.bias", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.attn2.to_q.weight": "down_blocks.0.attentions.0.transformer_blocks.0.attn2.to_q.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.attn2.to_k.weight": "down_blocks.0.attentions.0.transformer_blocks.0.attn2.to_k.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.attn2.to_v.weight": "down_blocks.0.attentions.0.transformer_blocks.0.attn2.to_v.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.attn2.to_out.0.weight": "down_blocks.0.attentions.0.transformer_blocks.0.attn2.to_out.0.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.attn2.to_out.0.bias": "down_blocks.0.attentions.0.transformer_blocks.0.attn2.to_out.0.bias", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.norm1.weight": "down_blocks.0.attentions.0.transformer_blocks.0.norm1.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.norm1.bias": "down_blocks.0.attentions.0.transformer_blocks.0.norm1.bias", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.norm2.weight": "down_blocks.0.attentions.0.transformer_blocks.0.norm2.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.norm2.bias": "down_blocks.0.attentions.0.transformer_blocks.0.norm2.bias", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.norm3.weight": "down_blocks.0.attentions.0.transformer_blocks.0.norm3.weight", "model.diffusion_model.input_blocks.1.1.transformer_blocks.0.norm3.bias": "down_blocks.0.attentions.0.transformer_blocks.0.norm3.bias", "model.diffusion_model.input_blocks.1.1.proj_out.weight": "down_blocks.0.attentions.0.proj_out.weight", "model.diffusion_model.input_blocks.1.1.proj_out.bias": "down_blocks.0.attentions.0.proj_out.bias", "model.diffusion_model.input_blocks.2.0.in_layers.0.weight": "down_blocks.0.resnets.1.norm1.weight", "model.diffusion_model.input_blocks.2.0.in_layers.0.bias": "down_blocks.0.resnets.1.norm1.bias", "model.diffusion_model.input_blocks.2.0.in_layers.2.weight": "down_blocks.0.resnets.1.conv1.weight", "model.diffusion_model.input_blocks.2.0.in_layers.2.bias": "down_blocks.0.resnets.1.conv1.bias", "model.diffusion_model.input_blocks.2.0.emb_layers.1.weight": "down_blocks.0.resnets.1.time_emb_proj.weight", "model.diffusion_model.input_blocks.2.0.emb_layers.1.bias": 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"model.diffusion_model.output_blocks.11.0.in_layers.0.weight": "up_blocks.3.resnets.2.norm1.weight", "model.diffusion_model.output_blocks.11.0.in_layers.0.bias": "up_blocks.3.resnets.2.norm1.bias", "model.diffusion_model.output_blocks.11.0.in_layers.2.weight": "up_blocks.3.resnets.2.conv1.weight", "model.diffusion_model.output_blocks.11.0.in_layers.2.bias": "up_blocks.3.resnets.2.conv1.bias", "model.diffusion_model.output_blocks.11.0.emb_layers.1.weight": "up_blocks.3.resnets.2.time_emb_proj.weight", "model.diffusion_model.output_blocks.11.0.emb_layers.1.bias": "up_blocks.3.resnets.2.time_emb_proj.bias", "model.diffusion_model.output_blocks.11.0.out_layers.0.weight": "up_blocks.3.resnets.2.norm2.weight", "model.diffusion_model.output_blocks.11.0.out_layers.0.bias": "up_blocks.3.resnets.2.norm2.bias", "model.diffusion_model.output_blocks.11.0.out_layers.3.weight": "up_blocks.3.resnets.2.conv2.weight", "model.diffusion_model.output_blocks.11.0.out_layers.3.bias": "up_blocks.3.resnets.2.conv2.bias", "model.diffusion_model.output_blocks.11.0.skip_connection.weight": "up_blocks.3.resnets.2.conv_shortcut.weight", "model.diffusion_model.output_blocks.11.0.skip_connection.bias": "up_blocks.3.resnets.2.conv_shortcut.bias", "model.diffusion_model.output_blocks.11.1.norm.weight": "up_blocks.3.attentions.2.norm.weight", "model.diffusion_model.output_blocks.11.1.norm.bias": "up_blocks.3.attentions.2.norm.bias", "model.diffusion_model.output_blocks.11.1.proj_in.weight": "up_blocks.3.attentions.2.proj_in.weight", "model.diffusion_model.output_blocks.11.1.proj_in.bias": "up_blocks.3.attentions.2.proj_in.bias", "model.diffusion_model.output_blocks.11.1.transformer_blocks.0.attn1.to_q.weight": "up_blocks.3.attentions.2.transformer_blocks.0.attn1.to_q.weight", "model.diffusion_model.output_blocks.11.1.transformer_blocks.0.attn1.to_k.weight": "up_blocks.3.attentions.2.transformer_blocks.0.attn1.to_k.weight", 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"model.diffusion_model.output_blocks.11.1.transformer_blocks.0.norm1.bias": "up_blocks.3.attentions.2.transformer_blocks.0.norm1.bias", "model.diffusion_model.output_blocks.11.1.transformer_blocks.0.norm2.weight": "up_blocks.3.attentions.2.transformer_blocks.0.norm2.weight", "model.diffusion_model.output_blocks.11.1.transformer_blocks.0.norm2.bias": "up_blocks.3.attentions.2.transformer_blocks.0.norm2.bias", "model.diffusion_model.output_blocks.11.1.transformer_blocks.0.norm3.weight": "up_blocks.3.attentions.2.transformer_blocks.0.norm3.weight", "model.diffusion_model.output_blocks.11.1.transformer_blocks.0.norm3.bias": "up_blocks.3.attentions.2.transformer_blocks.0.norm3.bias", "model.diffusion_model.output_blocks.11.1.proj_out.weight": "up_blocks.3.attentions.2.proj_out.weight", "model.diffusion_model.output_blocks.11.1.proj_out.bias": "up_blocks.3.attentions.2.proj_out.bias"}
# unpack state_dict if encapsulated.
checkpoint = checkpoint.pop("state_dict", checkpoint)
# keys known to be missing in some cases
missing_diffusers_keys_unet = ['up_blocks.0.upsamplers.0.conv.weight', 'up_blocks.0.upsamplers.0.conv.bias', 'up_blocks.1.upsamplers.0.conv.weight', 'up_blocks.1.upsamplers.0.conv.bias', 'up_blocks.2.upsamplers.0.conv.weight', 'up_blocks.2.upsamplers.0.conv.bias']
# keys known to be incorrectly loaded in some cases
unwanted_diffusers_keys_unet = ["up_blocks.0.attentions.2.conv.bias", "up_blocks.0.attentions.2.conv.weight"]
# resolve keys from KeyMap
missing_keypairs = [([oldkey for oldkey,newkey in KeyMap.items() if newkey==missing_key][0], missing_key) for missing_key in missing_diffusers_keys_unet]
# store missing keys!
missing_keys_store = {pair[1]:checkpoint[pair[0]].clone() for pair in missing_keypairs}
sd = {}
for k, v in checkpoint.items():
new_key = transform_checkpoint_dict_key(k)
if new_key is not None:
sd[new_key] = v
checkpoint.clear()
checkpoint.update(sd)
print(f"Shared pointers in checkpoint: {shared_pointers(checkpoint)}")
upcast_attention = False
if args.original_config_file is None:
key_name = "model.diffusion_model.input_blocks.2.1.transformer_blocks.0.attn2.to_k.weight"
if key_name in checkpoint and checkpoint[key_name].shape[-1] == 1024:
if not os.path.isfile("v2-inference-v.yaml"):
# model_type = "v2"
try:
import urllib.request
urllib.request.urlretrieve("https://raw.githubusercontent.com/Stability-AI/stablediffusion/main/configs/stable-diffusion/v2-inference-v.yaml", "v2-inference-v.yaml")
except ImportError:
print("could not import urllib. attempting wget.")
os.system(
"wget https://raw.githubusercontent.com/Stability-AI/stablediffusion/main/configs/stable-diffusion/v2-inference-v.yaml"
" -O v2-inference-v.yaml"
)
args.original_config_file = "./v2-inference-v.yaml"
if global_step == 110000:
# v2.1 needs to upcast attention
upcast_attention = True
else:
if not os.path.isfile("v1-inference.yaml"):
# model_type = "v1"
try:
import urllib.request
urllib.request.urlretrieve("https://raw.githubusercontent.com/CompVis/stable-diffusion/main/configs/stable-diffusion/v1-inference.yaml", "v1-inference.yaml")
except ImportError:
print("could not import urllib. attempting wget.")
os.system(
"wget https://raw.githubusercontent.com/CompVis/stable-diffusion/main/configs/stable-diffusion/v1-inference.yaml"
" -O v1-inference.yaml"
)
args.original_config_file = "./v1-inference.yaml"
original_config = OmegaConf.load(args.original_config_file)
if args.num_in_channels is not None:
original_config["model"]["params"]["unet_config"]["params"]["in_channels"] = args.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
num_train_timesteps = original_config.model.params.timesteps
beta_start = original_config.model.params.linear_start
beta_end = original_config.model.params.linear_end
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 args.scheduler_type == "pndm":
config = dict(scheduler.config)
config["skip_prk_steps"] = True
scheduler = PNDMScheduler.from_config(config)
elif args.scheduler_type == "lms":
scheduler = LMSDiscreteScheduler.from_config(scheduler.config)
#elif args.scheduler_type == "heun":
# scheduler = HeunDiscreteScheduler.from_config(scheduler.config)
elif args.scheduler_type == "euler":
scheduler = EulerDiscreteScheduler.from_config(scheduler.config)
#elif args.scheduler_type == "euler-ancestral":
# scheduler = EulerAncestralDiscreteScheduler.from_config(scheduler.config)
#elif args.scheduler_type == "dpm":
# scheduler = DPMSolverMultistepScheduler.from_config(scheduler.config)
elif args.scheduler_type == "ddim":
scheduler = scheduler
else:
raise ValueError(f"Scheduler of type {args.scheduler_type} doesn't exist!")
# Convert the UNet2DConditionModel model.
unet_config = create_unet_diffusers_config(original_config, image_size=image_size)
"""unet_config = { # diffusers SD1.4 UNET OVERRIDE
"_class_name": "UNet2DConditionModel", "_diffusers_version": "0.6.0", "act_fn": "silu", "attention_head_dim": 8, "block_out_channels": [ 320, 640, 1280, 1280 ],
"center_input_sample": False, "cross_attention_dim": 768, "down_block_types": [ "CrossAttnDownBlock2D", "CrossAttnDownBlock2D", "CrossAttnDownBlock2D", "DownBlock2D" ],
"downsample_padding": 1, "flip_sin_to_cos": True, "freq_shift": 0, "in_channels": 4, "layers_per_block": 2, "mid_block_scale_factor": 1, "norm_eps": 1e-05, "norm_num_groups": 32, "out_channels": 4, "sample_size": 64,
"up_block_types": [ "UpBlock2D", "CrossAttnUpBlock2D", "CrossAttnUpBlock2D", "CrossAttnUpBlock2D" ]
}"""
unet_config["upcast_attention"] = upcast_attention
unet = UNet2DConditionModel(**unet_config)
converted_unet_checkpoint = convert_ldm_unet_checkpoint(
checkpoint, unet_config, path=args.checkpoint_path, extract_ema=args.extract_ema
)
amended = 0
for k in missing_keys_store:
if not k in converted_unet_checkpoint:
converted_unet_checkpoint[k] = missing_keys_store[k]
amended += 1
removed = 0
for k in unwanted_diffusers_keys_unet:
if k in converted_unet_checkpoint:
converted_unet_checkpoint.pop(k)
removed += 1
print(f"Of {len(missing_keys_store)} keys known to sometimes be missing for (thus far) unknown reasons, {amended} were missing and amended.")
print(f"Of {len(unwanted_diffusers_keys_unet)} unsuitable keys known to sometimes be present for (thus far) unknown reasons, {removed} were found and purged.")
unet.load_state_dict(converted_unet_checkpoint)
# Convert the VAE model.
vae_config = create_vae_diffusers_config(original_config, image_size=image_size)
converted_vae_checkpoint = convert_ldm_vae_checkpoint(checkpoint, vae_config)
vae = AutoencoderKL(**vae_config)
vae.load_state_dict(converted_vae_checkpoint)
# Convert the text model.
model_type = args.pipeline_type
if model_type is None:
model_type = original_config.model.params.cond_stage_config.target.split(".")[-1]
if model_type == "FrozenOpenCLIPEmbedder":
text_model = convert_open_clip_checkpoint(checkpoint)
tokenizer = CLIPTokenizer.from_pretrained("stabilityai/stable-diffusion-2", subfolder="tokenizer")
pipe = StableDiffusionPipeline(
vae=vae,
text_encoder=text_model,
tokenizer=tokenizer,
unet=unet,
scheduler=scheduler,
safety_checker=None,
feature_extractor=None,
requires_safety_checker=False,
)
elif model_type == "PaintByExample":
vision_model = convert_paint_by_example_checkpoint(checkpoint)
tokenizer = CLIPTokenizer.from_pretrained("openai/clip-vit-large-patch14")
feature_extractor = AutoFeatureExtractor.from_pretrained("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)
tokenizer = CLIPTokenizer.from_pretrained("openai/clip-vit-large-patch14")
safety_checker = StableDiffusionSafetyChecker.from_pretrained("CompVis/stable-diffusion-safety-checker")
feature_extractor = AutoFeatureExtractor.from_pretrained("CompVis/stable-diffusion-safety-checker")
pipe = StableDiffusionPipeline(
vae=vae,
text_encoder=text_model,
tokenizer=tokenizer,
unet=unet,
scheduler=scheduler,
safety_checker=safety_checker,
feature_extractor=feature_extractor,
)
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")
pipe = LDMTextToImagePipeline(vqvae=vae, bert=text_model, tokenizer=tokenizer, unet=unet, scheduler=scheduler)
pipe.save_pretrained(args.dump_path)
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