Duplicate from diffusers/convert-sd-ckpt

Co-authored-by: Anton Lozhkov <anton-l@users.noreply.huggingface.co>

.gitattributes

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+*.7z filter=lfs diff=lfs merge=lfs -text
+*.arrow filter=lfs diff=lfs merge=lfs -text
+*.bin filter=lfs diff=lfs merge=lfs -text
+*.bz2 filter=lfs diff=lfs merge=lfs -text
+*.ckpt filter=lfs diff=lfs merge=lfs -text
+*.ftz filter=lfs diff=lfs merge=lfs -text
+*.gz filter=lfs diff=lfs merge=lfs -text
+*.h5 filter=lfs diff=lfs merge=lfs -text
+*.joblib filter=lfs diff=lfs merge=lfs -text
+*.lfs.* filter=lfs diff=lfs merge=lfs -text
+*.mlmodel filter=lfs diff=lfs merge=lfs -text
+*.model filter=lfs diff=lfs merge=lfs -text
+*.msgpack filter=lfs diff=lfs merge=lfs -text
+*.npy filter=lfs diff=lfs merge=lfs -text
+*.npz filter=lfs diff=lfs merge=lfs -text
+*.onnx filter=lfs diff=lfs merge=lfs -text
+*.ot filter=lfs diff=lfs merge=lfs -text
+*.parquet filter=lfs diff=lfs merge=lfs -text
+*.pb filter=lfs diff=lfs merge=lfs -text
+*.pickle filter=lfs diff=lfs merge=lfs -text
+*.pkl filter=lfs diff=lfs merge=lfs -text
+*.pt filter=lfs diff=lfs merge=lfs -text
+*.pth filter=lfs diff=lfs merge=lfs -text
+*.rar filter=lfs diff=lfs merge=lfs -text
+*.safetensors filter=lfs diff=lfs merge=lfs -text
+saved_model/**/* filter=lfs diff=lfs merge=lfs -text
+*.tar.* filter=lfs diff=lfs merge=lfs -text
+*.tflite filter=lfs diff=lfs merge=lfs -text
+*.tgz filter=lfs diff=lfs merge=lfs -text
+*.wasm filter=lfs diff=lfs merge=lfs -text
+*.xz filter=lfs diff=lfs merge=lfs -text
+*.zip filter=lfs diff=lfs merge=lfs -text
+*.zst filter=lfs diff=lfs merge=lfs -text
+*tfevents* filter=lfs diff=lfs merge=lfs -text

README.md

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+---
+title: Convert to Diffusers
+emoji: 🤖
+colorFrom: indigo
+colorTo: pink
+sdk: gradio
+sdk_version: 3.9.1
+app_file: app.py
+pinned: false
+license: apache-2.0
+duplicated_from: diffusers/convert-sd-ckpt
+---
+
+Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference

app.py

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+import io
+import os
+import shutil
+import zipfile
+
+import gradio as gr
+import requests
+from huggingface_hub import create_repo, upload_folder, whoami
+
+from convert import convert_full_checkpoint
+
+MODELS_DIR = "models/"
+CKPT_FILE = MODELS_DIR + "model.ckpt"
+HF_MODEL_DIR = MODELS_DIR + "diffusers_model"
+ZIP_FILE = MODELS_DIR + "model.zip"
+
+
+def download_ckpt(url, out_path):
+    with open(out_path, "wb") as out_file:
+        with requests.get(url, stream=True) as r:
+            r.raise_for_status()
+            for chunk in r.iter_content(chunk_size=8192):
+                out_file.write(chunk)
+
+
+def zip_model(model_path, zip_path):
+    with zipfile.ZipFile(zip_path, "w", zipfile.ZIP_STORED) as zip_file:
+        for root, dirs, files in os.walk(model_path):
+            for file in files:
+                zip_file.write(
+                    os.path.join(root, file),
+                    os.path.relpath(
+                        os.path.join(root, file), os.path.join(model_path, "..")
+                    ),
+                )
+
+
+def download_checkpoint_and_config(ckpt_url, config_url):
+    ckpt_url = ckpt_url.strip()
+    config_url = config_url.strip()
+
+    if not ckpt_url.startswith("http://") and not ckpt_url.startswith("https://"):
+        raise ValueError("Invalid checkpoint URL")
+
+    if config_url.startswith("http://") or config_url.startswith("https://"):
+        response = requests.get(config_url)
+        response.raise_for_status()
+        config_file = io.BytesIO(response.content)
+    elif config_url != "":
+        raise ValueError("Invalid config URL")
+    else:
+        config_file = open("original_config.yaml", "r")
+
+    download_ckpt(ckpt_url, CKPT_FILE)
+
+    return CKPT_FILE, config_file
+
+
+def convert_and_download(ckpt_url, config_url, scheduler_type, extract_ema):
+    shutil.rmtree(MODELS_DIR, ignore_errors=True)
+    os.makedirs(HF_MODEL_DIR)
+
+    ckpt_path, config_file = download_checkpoint_and_config(ckpt_url, config_url)
+
+    convert_full_checkpoint(
+        ckpt_path,
+        config_file,
+        scheduler_type=scheduler_type,
+        extract_ema=(extract_ema == "EMA"),
+        output_path=HF_MODEL_DIR,
+    )
+    zip_model(HF_MODEL_DIR, ZIP_FILE)
+
+    return ZIP_FILE
+
+
+def convert_and_upload(
+    ckpt_url, config_url, scheduler_type, extract_ema, token, model_name
+):
+    shutil.rmtree(MODELS_DIR, ignore_errors=True)
+    os.makedirs(HF_MODEL_DIR)
+
+    try:
+        ckpt_path, config_file = download_checkpoint_and_config(ckpt_url, config_url)
+
+        username = whoami(token)["name"]
+        repo_name = f"{username}/{model_name}"
+        repo_url = create_repo(repo_name, token=token, exist_ok=True)
+        convert_full_checkpoint(
+            ckpt_path,
+            config_file,
+            scheduler_type=scheduler_type,
+            extract_ema=(extract_ema == "EMA"),
+            output_path=HF_MODEL_DIR,
+        )
+        upload_folder(repo_id=repo_name, folder_path=HF_MODEL_DIR, token=token, commit_message=f"Upload diffusers weights")
+    except Exception as e:
+        return f"#### Error: {e}"
+    return f"#### Success! Model uploaded to [{repo_url}]({repo_url})"
+
+
+TTILE_IMAGE = """
+<div
+    style="
+        display: block;
+        margin-left: auto;
+        margin-right: auto;
+        width: 50%;
+    "
+>
+<img src="https://github.com/huggingface/diffusers/raw/main/docs/source/imgs/diffusers_library.jpg"/>
+</div>
+"""
+
+TITLE = """
+<div
+    style="
+        display: inline-flex;
+        align-items: center;
+        text-align: center;
+        max-width: 1400px;
+        gap: 0.8rem;
+        font-size: 2.2rem;
+    "
+>
+<h1 style="font-weight: 900; margin-bottom: 10px; margin-top: 10px;">
+    Convert Stable Diffusion `.ckpt` files to Hugging Face Diffusers 🔥
+</h1>
+</div>
+"""
+
+with gr.Blocks() as interface:
+    gr.HTML(TTILE_IMAGE)
+    gr.HTML(TITLE)
+    gr.Markdown("We will perform all of the checkpoint surgery for you, and create a clean diffusers model!")
+    gr.Markdown("This converter will also remove any pickled code from third-party checkpoints.")
+
+    with gr.Row():
+        with gr.Column(scale=50):
+            gr.Markdown("### 1. Paste a URL to your <model>.ckpt file")
+            ckpt_url = gr.Textbox(
+                max_lines=1,
+                label="URL to <model>.ckpt",
+                placeholder="https://huggingface.co/runwayml/stable-diffusion-v1-5/resolve/main/v1-5-pruned.ckpt",
+            )
+
+        with gr.Column(scale=50):
+            gr.Markdown("### (Optional) paste a URL to your <config>.yaml file")
+            config_url = gr.Textbox(
+                max_lines=1,
+                label="URL to <config>.yaml",
+                placeholder="https://huggingface.co/runwayml/stable-diffusion-v1-5/resolve/main/v1-inference.yaml",
+            )
+            gr.Markdown(
+                "**If you don't provide a config file, we'll try to use"
+                " [v1-inference.yaml](https://huggingface.co/runwayml/stable-diffusion-v1-5/blob/main/v1-inference.yaml).*"
+            )
+    with gr.Accordion("Advanced Settings"):
+            scheduler_type = gr.Dropdown(
+                label="Choose a scheduler type (if not sure, keep the PNDM default)",
+                choices=["PNDM", "K-LMS", "Euler", "EulerAncestral", "DDIM"],
+                value="PNDM",
+            )
+            extract_ema = gr.Radio(
+                label=(
+                    "EMA weights usually yield higher quality images for inference."
+                    " Non-EMA weights are usually better to continue fine-tuning."
+                ),
+                choices=["EMA", "Non-EMA"],
+                value="EMA",
+                interactive=True,
+            )
+
+    gr.Markdown("### 2. Choose what to do with the converted model")
+    model_choice = gr.Radio(
+        show_label=False,
+        choices=[
+            "Download the model as an archive",
+            "Host the model on the Hugging Face Hub",
+            # "Submit a PR with the model for an existing Hub repository",
+        ],
+        type="index",
+        value="Download the model as an archive",
+        interactive=True,
+    )
+
+    download_panel = gr.Column(visible=True)
+    upload_panel = gr.Column(visible=False)
+    # pr_panel = gr.Column(visible=False)
+
+    model_choice.change(
+        fn=lambda i: gr.update(visible=(i == 0)),
+        inputs=model_choice,
+        outputs=download_panel,
+    )
+    model_choice.change(
+        fn=lambda i: gr.update(visible=(i == 1)),
+        inputs=model_choice,
+        outputs=upload_panel,
+    )
+    # model_choice.change(
+    #     fn=lambda i: gr.update(visible=(i == 2)),
+    #     inputs=model_choice,
+    #     outputs=pr_panel,
+    # )
+
+    with download_panel:
+        gr.Markdown("### 3. Convert and download")
+
+        down_btn = gr.Button("Convert")
+        output_file = gr.File(
+            label="Download the converted model",
+            type="binary",
+            interactive=False,
+            visible=True,
+        )
+
+        down_btn.click(
+            fn=convert_and_download,
+            inputs=[ckpt_url, config_url, scheduler_type, extract_ema],
+            outputs=output_file,
+        )
+
+    with upload_panel:
+        gr.Markdown("### 3. Convert and host on the Hub")
+        gr.Markdown(
+            "This will create a new repository if it doesn't exist yet, and upload the model to the Hugging Face Hub.\n\n"
+            "Paste a WRITE token from [https://huggingface.co/settings/tokens](https://huggingface.co/settings/tokens)"
+            " and make up a model name."
+        )
+        up_token = gr.Textbox(
+            max_lines=1,
+            label="Hugging Face token",
+        )
+        up_model_name = gr.Textbox(
+            max_lines=1,
+            label="Hub model name (e.g. `artistic-diffusion-v1`)",
+            placeholder="my-awesome-model",
+        )
+
+        upload_btn = gr.Button("Convert and upload")
+        with gr.Box():
+            output_text = gr.Markdown()
+        upload_btn.click(
+            fn=convert_and_upload,
+            inputs=[
+                ckpt_url,
+                config_url,
+                scheduler_type,
+                extract_ema,
+                up_token,
+                up_model_name,
+            ],
+            outputs=output_text,
+        )
+
+    # with pr_panel:
+    #     gr.Markdown("### 3. Convert and submit as a PR")
+    #     gr.Markdown(
+    #         "This will open a Pull Request on the original model repository, if it already exists on the Hub.\n\n"
+    #         "Paste a write-access token from [https://huggingface.co/settings/tokens](https://huggingface.co/settings/tokens)"
+    #         " and paste an existing model id from the Hub in the `username/model-name` form."
+    #     )
+    #     pr_token = gr.Textbox(
+    #         max_lines=1,
+    #         label="Hugging Face token",
+    #     )
+    #     pr_model_name = gr.Textbox(
+    #         max_lines=1,
+    #         label="Hub model name (e.g. `diffuser/artistic-diffusion-v1`)",
+    #         placeholder="diffuser/my-awesome-model",
+    #     )
+    #
+    #     btn = gr.Button("Convert and open a PR")
+    #     output = gr.Markdown(label="Output")
+
+
+interface.queue(concurrency_count=1)
+interface.launch()

convert.py

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+# 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 Stable Diffusion checkpoints. """
+
+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,
+                       EulerAncestralDiscreteScheduler, EulerDiscreteScheduler,
+                       LMSDiscreteScheduler, PNDMScheduler,
+                       StableDiffusionPipeline, UNet2DConditionModel)
+from diffusers.pipelines.latent_diffusion.pipeline_latent_diffusion import (
+    LDMBertConfig, LDMBertModel)
+from diffusers.pipelines.stable_diffusion import StableDiffusionSafetyChecker
+from transformers import AutoFeatureExtractor, CLIPTextModel, CLIPTokenizer
+
+
+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):
+    """
+    Creates a config for the diffusers based on the config of the LDM model.
+    """
+    unet_params = original_config.model.params.unet_config.params
+
+    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
+
+    config = dict(
+        sample_size=unet_params.image_size,
+        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=unet_params.num_heads,
+    )
+
+    return config
+
+
+def create_vae_diffusers_config(original_config):
+    """
+    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=vae_params.resolution,
+        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, 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 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
+
+
+def convert_full_checkpoint(
+    checkpoint_path: str, config_file, scheduler_type, extract_ema, output_path=None
+):
+    original_config = OmegaConf.load(config_file)
+    checkpoint = torch.load(checkpoint_path, weights_only=False)
+    checkpoint = checkpoint["state_dict"]
+
+    num_train_timesteps = original_config.model.params.timesteps
+    beta_start = original_config.model.params.linear_start
+    beta_end = original_config.model.params.linear_end
+    if scheduler_type == "PNDM":
+        scheduler = PNDMScheduler(
+            beta_end=beta_end,
+            beta_schedule="scaled_linear",
+            beta_start=beta_start,
+            num_train_timesteps=num_train_timesteps,
+            skip_prk_steps=True,
+        )
+    elif scheduler_type == "K-LMS":
+        scheduler = LMSDiscreteScheduler(
+            beta_start=beta_start, beta_end=beta_end, beta_schedule="scaled_linear"
+        )
+    elif scheduler_type == "Euler":
+        scheduler = EulerDiscreteScheduler(
+            beta_start=beta_start, beta_end=beta_end, beta_schedule="scaled_linear"
+        )
+    elif scheduler_type == "EulerAncestral":
+        scheduler = EulerAncestralDiscreteScheduler(
+            beta_start=beta_start, beta_end=beta_end, beta_schedule="scaled_linear"
+        )
+    elif scheduler_type == "DDIM":
+        scheduler = DDIMScheduler(
+            beta_start=beta_start,
+            beta_end=beta_end,
+            beta_schedule="scaled_linear",
+            clip_sample=False,
+            set_alpha_to_one=False,
+        )
+    else:
+        raise ValueError(f"Scheduler of type {scheduler_type} doesn't exist!")
+
+    # Convert the UNet2DConditionModel model.
+    unet_config = create_unet_diffusers_config(original_config)
+    converted_unet_checkpoint = convert_ldm_unet_checkpoint(
+        checkpoint, unet_config, extract_ema=extract_ema
+    )
+
+    # Convert the VAE model.
+    vae_config = create_vae_diffusers_config(original_config)
+    converted_vae_checkpoint = convert_ldm_vae_checkpoint(checkpoint, vae_config)
+
+    # Convert the text model.
+    text_model = convert_ldm_clip_checkpoint(checkpoint)
+
+    del checkpoint
+
+    unet = UNet2DConditionModel(**unet_config)
+    unet.load_state_dict(converted_unet_checkpoint)
+    del converted_unet_checkpoint
+
+    vae = AutoencoderKL(**vae_config)
+    vae.load_state_dict(converted_vae_checkpoint)
+    del converted_vae_checkpoint
+
+    tokenizer = CLIPTokenizer.from_pretrained("openai/clip-vit-large-patch14")
+    safety_checker = StableDiffusionSafetyChecker.from_pretrained(
+        "CompVis/stable-diffusion-safety-checker", device_map="auto"
+    )
+    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,
+    )
+
+    pipe.save_pretrained(output_path)

original_config.yaml

@@ -0,0 +1,70 @@
+model:
+  base_learning_rate: 1.0e-04
+  target: ldm.models.diffusion.ddpm.LatentDiffusion
+  params:
+    linear_start: 0.00085
+    linear_end: 0.0120
+    num_timesteps_cond: 1
+    log_every_t: 200
+    timesteps: 1000
+    first_stage_key: "jpg"
+    cond_stage_key: "txt"
+    image_size: 64
+    channels: 4
+    cond_stage_trainable: false   # Note: different from the one we trained before
+    conditioning_key: crossattn
+    monitor: val/loss_simple_ema
+    scale_factor: 0.18215
+    use_ema: False
+
+    scheduler_config: # 10000 warmup steps
+      target: ldm.lr_scheduler.LambdaLinearScheduler
+      params:
+        warm_up_steps: [ 10000 ]
+        cycle_lengths: [ 10000000000000 ] # incredibly large number to prevent corner cases
+        f_start: [ 1.e-6 ]
+        f_max: [ 1. ]
+        f_min: [ 1. ]
+
+    unet_config:
+      target: ldm.modules.diffusionmodules.openaimodel.UNetModel
+      params:
+        image_size: 32 # unused
+        in_channels: 4
+        out_channels: 4
+        model_channels: 320
+        attention_resolutions: [ 4, 2, 1 ]
+        num_res_blocks: 2
+        channel_mult: [ 1, 2, 4, 4 ]
+        num_heads: 8
+        use_spatial_transformer: True
+        transformer_depth: 1
+        context_dim: 768
+        use_checkpoint: True
+        legacy: False
+
+    first_stage_config:
+      target: ldm.models.autoencoder.AutoencoderKL
+      params:
+        embed_dim: 4
+        monitor: val/rec_loss
+        ddconfig:
+          double_z: true
+          z_channels: 4
+          resolution: 256
+          in_channels: 3
+          out_ch: 3
+          ch: 128
+          ch_mult:
+          - 1
+          - 2
+          - 4
+          - 4
+          num_res_blocks: 2
+          attn_resolutions: []
+          dropout: 0.0
+        lossconfig:
+          target: torch.nn.Identity
+
+    cond_stage_config:
+      target: ldm.modules.encoders.modules.FrozenCLIPEmbedder

requirements.txt

@@ -0,0 +1,6 @@
+OmegaConf
+pytorch_lightning
+accelerate
+diffusers[torch]
+transformers
+scipy