import collections import os.path import sys import gc from collections import namedtuple import torch import re import safetensors.torch from omegaconf import OmegaConf from ldm.util import instantiate_from_config from modules import shared, modelloader, devices, script_callbacks, sd_vae from modules.paths import models_path from modules.sd_hijack_inpainting import do_inpainting_hijack, should_hijack_inpainting model_dir = "Stable-diffusion" model_path = os.path.abspath(os.path.join(models_path, model_dir)) CheckpointInfo = namedtuple("CheckpointInfo", ['filename', 'title', 'hash', 'model_name', 'config']) checkpoints_list = {} checkpoints_loaded = collections.OrderedDict() try: # this silences the annoying "Some weights of the model checkpoint were not used when initializing..." message at start. from transformers import logging, CLIPModel logging.set_verbosity_error() except Exception: pass def setup_model(): if not os.path.exists(model_path): os.makedirs(model_path) list_models() def checkpoint_tiles(): convert = lambda name: int(name) if name.isdigit() else name.lower() alphanumeric_key = lambda key: [convert(c) for c in re.split('([0-9]+)', key)] return sorted([x.title for x in checkpoints_list.values()], key = alphanumeric_key) def list_models(): checkpoints_list.clear() model_list = modelloader.load_models(model_path=model_path, command_path=shared.cmd_opts.ckpt_dir, ext_filter=[".ckpt", ".safetensors"]) def modeltitle(path, shorthash): abspath = os.path.abspath(path) if shared.cmd_opts.ckpt_dir is not None and abspath.startswith(shared.cmd_opts.ckpt_dir): name = abspath.replace(shared.cmd_opts.ckpt_dir, '') elif abspath.startswith(model_path): name = abspath.replace(model_path, '') else: name = os.path.basename(path) if name.startswith("\\") or name.startswith("/"): name = name[1:] shortname = os.path.splitext(name.replace("/", "_").replace("\\", "_"))[0] return f'{name} [{shorthash}]', shortname cmd_ckpt = shared.cmd_opts.ckpt if os.path.exists(cmd_ckpt): h = model_hash(cmd_ckpt) title, short_model_name = modeltitle(cmd_ckpt, h) checkpoints_list[title] = CheckpointInfo(cmd_ckpt, title, h, short_model_name, shared.cmd_opts.config) shared.opts.data['sd_model_checkpoint'] = title elif cmd_ckpt is not None and cmd_ckpt != shared.default_sd_model_file: print(f"Checkpoint in --ckpt argument not found (Possible it was moved to {model_path}: {cmd_ckpt}", file=sys.stderr) for filename in model_list: h = model_hash(filename) title, short_model_name = modeltitle(filename, h) basename, _ = os.path.splitext(filename) config = basename + ".yaml" if not os.path.exists(config): config = shared.cmd_opts.config checkpoints_list[title] = CheckpointInfo(filename, title, h, short_model_name, config) def get_closet_checkpoint_match(searchString): applicable = sorted([info for info in checkpoints_list.values() if searchString in info.title], key = lambda x:len(x.title)) if len(applicable) > 0: return applicable[0] return None def model_hash(filename): try: with open(filename, "rb") as file: import hashlib m = hashlib.sha256() file.seek(0x100000) m.update(file.read(0x10000)) return m.hexdigest()[0:8] except FileNotFoundError: return 'NOFILE' def select_checkpoint(): model_checkpoint = shared.opts.sd_model_checkpoint checkpoint_info = checkpoints_list.get(model_checkpoint, None) if checkpoint_info is not None: return checkpoint_info if len(checkpoints_list) == 0: print(f"No checkpoints found. When searching for checkpoints, looked at:", file=sys.stderr) if shared.cmd_opts.ckpt is not None: print(f" - file {os.path.abspath(shared.cmd_opts.ckpt)}", file=sys.stderr) print(f" - directory {model_path}", file=sys.stderr) if shared.cmd_opts.ckpt_dir is not None: print(f" - directory {os.path.abspath(shared.cmd_opts.ckpt_dir)}", file=sys.stderr) print(f"Can't run without a checkpoint. Find and place a .ckpt file into any of those locations. The program will exit.", file=sys.stderr) exit(1) checkpoint_info = next(iter(checkpoints_list.values())) if model_checkpoint is not None: print(f"Checkpoint {model_checkpoint} not found; loading fallback {checkpoint_info.title}", file=sys.stderr) return checkpoint_info 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 get_state_dict_from_checkpoint(pl_sd): if "state_dict" in pl_sd: pl_sd = pl_sd["state_dict"] sd = {} for k, v in pl_sd.items(): new_key = transform_checkpoint_dict_key(k) if new_key is not None: sd[new_key] = v pl_sd.clear() pl_sd.update(sd) return pl_sd def read_state_dict(checkpoint_file, print_global_state=False, map_location=None): _, extension = os.path.splitext(checkpoint_file) if extension.lower() == ".safetensors": pl_sd = safetensors.torch.load_file(checkpoint_file, device=map_location or shared.weight_load_location) else: pl_sd = torch.load(checkpoint_file, map_location=map_location or shared.weight_load_location) if print_global_state and "global_step" in pl_sd: print(f"Global Step: {pl_sd['global_step']}") sd = get_state_dict_from_checkpoint(pl_sd) return sd def load_model_weights(model, checkpoint_info, vae_file="auto"): checkpoint_file = checkpoint_info.filename sd_model_hash = checkpoint_info.hash cache_enabled = shared.opts.sd_checkpoint_cache > 0 if cache_enabled and checkpoint_info in checkpoints_loaded: # use checkpoint cache print(f"Loading weights [{sd_model_hash}] from cache") model.load_state_dict(checkpoints_loaded[checkpoint_info]) else: # load from file print(f"Loading weights [{sd_model_hash}] from {checkpoint_file}") sd = read_state_dict(checkpoint_file) model.load_state_dict(sd, strict=False) del sd if cache_enabled: # cache newly loaded model checkpoints_loaded[checkpoint_info] = model.state_dict().copy() if shared.cmd_opts.opt_channelslast: model.to(memory_format=torch.channels_last) if not shared.cmd_opts.no_half: vae = model.first_stage_model # with --no-half-vae, remove VAE from model when doing half() to prevent its weights from being converted to float16 if shared.cmd_opts.no_half_vae: model.first_stage_model = None model.half() model.first_stage_model = vae devices.dtype = torch.float32 if shared.cmd_opts.no_half else torch.float16 devices.dtype_vae = torch.float32 if shared.cmd_opts.no_half or shared.cmd_opts.no_half_vae else torch.float16 model.first_stage_model.to(devices.dtype_vae) # clean up cache if limit is reached if cache_enabled: while len(checkpoints_loaded) > shared.opts.sd_checkpoint_cache + 1: # we need to count the current model checkpoints_loaded.popitem(last=False) # LRU model.sd_model_hash = sd_model_hash model.sd_model_checkpoint = checkpoint_file model.sd_checkpoint_info = checkpoint_info vae_file = sd_vae.resolve_vae(checkpoint_file, vae_file=vae_file) sd_vae.load_vae(model, vae_file) def load_model(checkpoint_info=None): from modules import lowvram, sd_hijack checkpoint_info = checkpoint_info or select_checkpoint() if checkpoint_info.config != shared.cmd_opts.config: print(f"Loading config from: {checkpoint_info.config}") if shared.sd_model: sd_hijack.model_hijack.undo_hijack(shared.sd_model) shared.sd_model = None gc.collect() devices.torch_gc() sd_config = OmegaConf.load(checkpoint_info.config) if should_hijack_inpainting(checkpoint_info): # Hardcoded config for now... sd_config.model.target = "ldm.models.diffusion.ddpm.LatentInpaintDiffusion" sd_config.model.params.use_ema = False sd_config.model.params.conditioning_key = "hybrid" sd_config.model.params.unet_config.params.in_channels = 9 # Create a "fake" config with a different name so that we know to unload it when switching models. checkpoint_info = checkpoint_info._replace(config=checkpoint_info.config.replace(".yaml", "-inpainting.yaml")) do_inpainting_hijack() if shared.cmd_opts.no_half: sd_config.model.params.unet_config.params.use_fp16 = False sd_model = instantiate_from_config(sd_config.model) load_model_weights(sd_model, checkpoint_info) if shared.cmd_opts.lowvram or shared.cmd_opts.medvram: lowvram.setup_for_low_vram(sd_model, shared.cmd_opts.medvram) else: sd_model.to(shared.device) sd_hijack.model_hijack.hijack(sd_model) sd_model.eval() shared.sd_model = sd_model script_callbacks.model_loaded_callback(sd_model) print(f"Model loaded.") return sd_model def reload_model_weights(sd_model=None, info=None): from modules import lowvram, devices, sd_hijack checkpoint_info = info or select_checkpoint() if not sd_model: sd_model = shared.sd_model if sd_model.sd_model_checkpoint == checkpoint_info.filename: return if sd_model.sd_checkpoint_info.config != checkpoint_info.config or should_hijack_inpainting(checkpoint_info) != should_hijack_inpainting(sd_model.sd_checkpoint_info): del sd_model checkpoints_loaded.clear() load_model(checkpoint_info) return shared.sd_model if shared.cmd_opts.lowvram or shared.cmd_opts.medvram: lowvram.send_everything_to_cpu() else: sd_model.to(devices.cpu) sd_hijack.model_hijack.undo_hijack(sd_model) load_model_weights(sd_model, checkpoint_info) sd_hijack.model_hijack.hijack(sd_model) script_callbacks.model_loaded_callback(sd_model) if not shared.cmd_opts.lowvram and not shared.cmd_opts.medvram: sd_model.to(devices.device) print(f"Weights loaded.") return sd_model