mirror of
https://github.com/kohya-ss/sd-scripts.git
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733 lines
29 KiB
Python
733 lines
29 KiB
Python
# base class for platform strategies. this file defines the interface for strategies
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import os
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import re
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from typing import Any, Dict, List, Optional, Tuple, Union
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import numpy as np
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from safetensors.torch import safe_open, save_file
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import torch
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from transformers import CLIPTokenizer, CLIPTextModel, CLIPTextModelWithProjection
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# TODO remove circular import by moving ImageInfo to a separate file
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# from library.train_util import ImageInfo
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from library import utils
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from library.utils import setup_logging
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setup_logging()
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import logging
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logger = logging.getLogger(__name__)
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def get_compatible_dtypes(dtype: Optional[Union[str, torch.dtype]]) -> List[torch.dtype]:
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if dtype is None:
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# all dtypes are acceptable
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return get_available_dtypes()
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dtype = utils.str_to_dtype(dtype) if isinstance(dtype, str) else dtype
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compatible_dtypes = [torch.float32]
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if dtype.itemsize == 1: # fp8
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compatible_dtypes.append(torch.bfloat16)
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compatible_dtypes.append(torch.float16)
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compatible_dtypes.append(dtype) # add the specified: bf16, fp16, one of fp8
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return compatible_dtypes
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def get_available_dtypes() -> List[torch.dtype]:
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"""
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Returns the list of available dtypes for latents caching. Higher precision is preferred.
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"""
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return [torch.float32, torch.bfloat16, torch.float16, torch.float8_e4m3fn, torch.float8_e5m2]
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class TokenizeStrategy:
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_strategy = None # strategy instance: actual strategy class
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_re_attention = re.compile(
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r"""\\\(|
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\\\)|
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\\\[|
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\\]|
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\\\\|
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\\|
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\(|
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\[|
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:([+-]?[.\d]+)\)|
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\)|
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]|
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[^\\()\[\]:]+|
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:
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""",
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re.X,
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)
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@classmethod
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def set_strategy(cls, strategy):
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if cls._strategy is not None:
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raise RuntimeError(f"Internal error. {cls.__name__} strategy is already set")
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cls._strategy = strategy
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@classmethod
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def get_strategy(cls) -> Optional["TokenizeStrategy"]:
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return cls._strategy
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def _load_tokenizer(
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self, model_class: Any, model_id: str, subfolder: Optional[str] = None, tokenizer_cache_dir: Optional[str] = None
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) -> Any:
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tokenizer = None
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if tokenizer_cache_dir:
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local_tokenizer_path = os.path.join(tokenizer_cache_dir, model_id.replace("/", "_"))
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if os.path.exists(local_tokenizer_path):
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logger.info(f"load tokenizer from cache: {local_tokenizer_path}")
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tokenizer = model_class.from_pretrained(local_tokenizer_path) # same for v1 and v2
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if tokenizer is None:
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tokenizer = model_class.from_pretrained(model_id, subfolder=subfolder)
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if tokenizer_cache_dir and not os.path.exists(local_tokenizer_path):
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logger.info(f"save Tokenizer to cache: {local_tokenizer_path}")
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tokenizer.save_pretrained(local_tokenizer_path)
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return tokenizer
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def tokenize(self, text: Union[str, List[str]]) -> List[torch.Tensor]:
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raise NotImplementedError
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def tokenize_with_weights(self, text: Union[str, List[str]]) -> Tuple[List[torch.Tensor], List[torch.Tensor]]:
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"""
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returns: [tokens1, tokens2, ...], [weights1, weights2, ...]
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"""
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raise NotImplementedError
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def _get_weighted_input_ids(
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self, tokenizer: CLIPTokenizer, text: str, max_length: Optional[int] = None
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) -> Tuple[torch.Tensor, torch.Tensor]:
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"""
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max_length includes starting and ending tokens.
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"""
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def parse_prompt_attention(text):
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"""
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Parses a string with attention tokens and returns a list of pairs: text and its associated weight.
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Accepted tokens are:
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(abc) - increases attention to abc by a multiplier of 1.1
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(abc:3.12) - increases attention to abc by a multiplier of 3.12
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[abc] - decreases attention to abc by a multiplier of 1.1
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\( - literal character '('
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\[ - literal character '['
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\) - literal character ')'
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\] - literal character ']'
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\\ - literal character '\'
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anything else - just text
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>>> parse_prompt_attention('normal text')
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[['normal text', 1.0]]
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>>> parse_prompt_attention('an (important) word')
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[['an ', 1.0], ['important', 1.1], [' word', 1.0]]
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>>> parse_prompt_attention('(unbalanced')
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[['unbalanced', 1.1]]
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>>> parse_prompt_attention('\(literal\]')
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[['(literal]', 1.0]]
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>>> parse_prompt_attention('(unnecessary)(parens)')
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[['unnecessaryparens', 1.1]]
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>>> parse_prompt_attention('a (((house:1.3)) [on] a (hill:0.5), sun, (((sky))).')
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[['a ', 1.0],
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['house', 1.5730000000000004],
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[' ', 1.1],
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['on', 1.0],
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[' a ', 1.1],
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['hill', 0.55],
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[', sun, ', 1.1],
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['sky', 1.4641000000000006],
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['.', 1.1]]
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"""
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res = []
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round_brackets = []
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square_brackets = []
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round_bracket_multiplier = 1.1
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square_bracket_multiplier = 1 / 1.1
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def multiply_range(start_position, multiplier):
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for p in range(start_position, len(res)):
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res[p][1] *= multiplier
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for m in TokenizeStrategy._re_attention.finditer(text):
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text = m.group(0)
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weight = m.group(1)
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if text.startswith("\\"):
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res.append([text[1:], 1.0])
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elif text == "(":
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round_brackets.append(len(res))
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elif text == "[":
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square_brackets.append(len(res))
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elif weight is not None and len(round_brackets) > 0:
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multiply_range(round_brackets.pop(), float(weight))
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elif text == ")" and len(round_brackets) > 0:
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multiply_range(round_brackets.pop(), round_bracket_multiplier)
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elif text == "]" and len(square_brackets) > 0:
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multiply_range(square_brackets.pop(), square_bracket_multiplier)
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else:
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res.append([text, 1.0])
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for pos in round_brackets:
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multiply_range(pos, round_bracket_multiplier)
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for pos in square_brackets:
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multiply_range(pos, square_bracket_multiplier)
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if len(res) == 0:
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res = [["", 1.0]]
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# merge runs of identical weights
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i = 0
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while i + 1 < len(res):
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if res[i][1] == res[i + 1][1]:
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res[i][0] += res[i + 1][0]
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res.pop(i + 1)
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else:
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i += 1
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return res
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def get_prompts_with_weights(text: str, max_length: int):
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r"""
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Tokenize a list of prompts and return its tokens with weights of each token. max_length does not include starting and ending token.
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No padding, starting or ending token is included.
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"""
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truncated = False
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texts_and_weights = parse_prompt_attention(text)
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tokens = []
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weights = []
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for word, weight in texts_and_weights:
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# tokenize and discard the starting and the ending token
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token = tokenizer(word).input_ids[1:-1]
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tokens += token
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# copy the weight by length of token
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weights += [weight] * len(token)
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# stop if the text is too long (longer than truncation limit)
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if len(tokens) > max_length:
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truncated = True
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break
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# truncate
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if len(tokens) > max_length:
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truncated = True
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tokens = tokens[:max_length]
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weights = weights[:max_length]
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if truncated:
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logger.warning("Prompt was truncated. Try to shorten the prompt or increase max_embeddings_multiples")
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return tokens, weights
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def pad_tokens_and_weights(tokens, weights, max_length, bos, eos, pad):
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r"""
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Pad the tokens (with starting and ending tokens) and weights (with 1.0) to max_length.
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"""
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tokens = [bos] + tokens + [eos] + [pad] * (max_length - 2 - len(tokens))
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weights = [1.0] + weights + [1.0] * (max_length - 1 - len(weights))
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return tokens, weights
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if max_length is None:
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max_length = tokenizer.model_max_length
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tokens, weights = get_prompts_with_weights(text, max_length - 2)
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tokens, weights = pad_tokens_and_weights(
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tokens, weights, max_length, tokenizer.bos_token_id, tokenizer.eos_token_id, tokenizer.pad_token_id
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)
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return torch.tensor(tokens).unsqueeze(0), torch.tensor(weights).unsqueeze(0)
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def _get_input_ids(
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self, tokenizer: CLIPTokenizer, text: str, max_length: Optional[int] = None, weighted: bool = False
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) -> torch.Tensor:
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"""
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for SD1.5/2.0/SDXL
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TODO support batch input
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"""
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if max_length is None:
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max_length = tokenizer.model_max_length - 2
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if weighted:
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input_ids, weights = self._get_weighted_input_ids(tokenizer, text, max_length)
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else:
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input_ids = tokenizer(text, padding="max_length", truncation=True, max_length=max_length, return_tensors="pt").input_ids
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if max_length > tokenizer.model_max_length:
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input_ids = input_ids.squeeze(0)
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iids_list = []
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if tokenizer.pad_token_id == tokenizer.eos_token_id:
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# v1
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# 77以上の時は "<BOS> .... <EOS> <EOS> <EOS>" でトータル227とかになっているので、"<BOS>...<EOS>"の三連に変換する
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# 1111氏のやつは , で区切る、とかしているようだが とりあえず単純に
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for i in range(1, max_length - tokenizer.model_max_length + 2, tokenizer.model_max_length - 2): # (1, 152, 75)
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ids_chunk = (
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input_ids[0].unsqueeze(0),
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input_ids[i : i + tokenizer.model_max_length - 2],
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input_ids[-1].unsqueeze(0),
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)
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ids_chunk = torch.cat(ids_chunk)
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iids_list.append(ids_chunk)
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else:
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# v2 or SDXL
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# 77以上の時は "<BOS> .... <EOS> <PAD> <PAD>..." でトータル227とかになっているので、"<BOS>...<EOS> <PAD> <PAD> ..."の三連に変換する
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for i in range(1, max_length - tokenizer.model_max_length + 2, tokenizer.model_max_length - 2):
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ids_chunk = (
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input_ids[0].unsqueeze(0), # BOS
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input_ids[i : i + tokenizer.model_max_length - 2],
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input_ids[-1].unsqueeze(0),
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) # PAD or EOS
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ids_chunk = torch.cat(ids_chunk)
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# 末尾が <EOS> <PAD> または <PAD> <PAD> の場合は、何もしなくてよい
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# 末尾が x <PAD/EOS> の場合は末尾を <EOS> に変える（x <EOS> なら結果的に変化なし）
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if ids_chunk[-2] != tokenizer.eos_token_id and ids_chunk[-2] != tokenizer.pad_token_id:
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ids_chunk[-1] = tokenizer.eos_token_id
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# 先頭が <BOS> <PAD> ... の場合は <BOS> <EOS> <PAD> ... に変える
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if ids_chunk[1] == tokenizer.pad_token_id:
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ids_chunk[1] = tokenizer.eos_token_id
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iids_list.append(ids_chunk)
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input_ids = torch.stack(iids_list) # 3,77
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if weighted:
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weights = weights.squeeze(0)
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new_weights = torch.ones(input_ids.shape)
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for i in range(1, max_length - tokenizer.model_max_length + 2, tokenizer.model_max_length - 2):
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b = i // (tokenizer.model_max_length - 2)
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new_weights[b, 1 : 1 + tokenizer.model_max_length - 2] = weights[i : i + tokenizer.model_max_length - 2]
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weights = new_weights
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if weighted:
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return input_ids, weights
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return input_ids
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class TextEncodingStrategy:
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_strategy = None # strategy instance: actual strategy class
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@classmethod
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def set_strategy(cls, strategy):
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if cls._strategy is not None:
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raise RuntimeError(f"Internal error. {cls.__name__} strategy is already set")
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cls._strategy = strategy
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@classmethod
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def get_strategy(cls) -> Optional["TextEncodingStrategy"]:
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return cls._strategy
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def encode_tokens(
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self, tokenize_strategy: TokenizeStrategy, models: List[Any], tokens: List[torch.Tensor]
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) -> List[torch.Tensor]:
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"""
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Encode tokens into embeddings and outputs.
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:param tokens: list of token tensors for each TextModel
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:return: list of output embeddings for each architecture
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"""
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raise NotImplementedError
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def encode_tokens_with_weights(
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self, tokenize_strategy: TokenizeStrategy, models: List[Any], tokens: List[torch.Tensor], weights: List[torch.Tensor]
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) -> List[torch.Tensor]:
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"""
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Encode tokens into embeddings and outputs.
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:param tokens: list of token tensors for each TextModel
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:param weights: list of weight tensors for each TextModel
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:return: list of output embeddings for each architecture
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"""
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raise NotImplementedError
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class TextEncoderOutputsCachingStrategy:
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_strategy = None # strategy instance: actual strategy class
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def __init__(
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self,
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cache_to_disk: bool,
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batch_size: Optional[int],
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skip_disk_cache_validity_check: bool,
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is_partial: bool = False,
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is_weighted: bool = False,
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) -> None:
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self._cache_to_disk = cache_to_disk
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self._batch_size = batch_size
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self.skip_disk_cache_validity_check = skip_disk_cache_validity_check
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self._is_partial = is_partial
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self._is_weighted = is_weighted
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@classmethod
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def set_strategy(cls, strategy):
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if cls._strategy is not None:
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raise RuntimeError(f"Internal error. {cls.__name__} strategy is already set")
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cls._strategy = strategy
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@classmethod
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def get_strategy(cls) -> Optional["TextEncoderOutputsCachingStrategy"]:
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return cls._strategy
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@property
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def cache_to_disk(self):
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return self._cache_to_disk
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@property
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def batch_size(self):
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return self._batch_size
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@property
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def is_partial(self):
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return self._is_partial
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@property
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def is_weighted(self):
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return self._is_weighted
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def get_outputs_npz_path(self, image_abs_path: str) -> str:
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raise NotImplementedError
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def load_outputs_npz(self, npz_path: str) -> List[np.ndarray]:
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raise NotImplementedError
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def is_disk_cached_outputs_expected(self, npz_path: str) -> bool:
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raise NotImplementedError
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def cache_batch_outputs(
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self, tokenize_strategy: TokenizeStrategy, models: List[Any], text_encoding_strategy: TextEncodingStrategy, batch: List
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):
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raise NotImplementedError
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class LatentsCachingStrategy:
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# TODO commonize utillity functions to this class, such as npz handling etc.
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_strategy = None # strategy instance: actual strategy class
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def __init__(
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self, architecture: str, latents_stride: int, cache_to_disk: bool, batch_size: int, skip_disk_cache_validity_check: bool
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) -> None:
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self._architecture = architecture
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self._latents_stride = latents_stride
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self._cache_to_disk = cache_to_disk
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self._batch_size = batch_size
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self.skip_disk_cache_validity_check = skip_disk_cache_validity_check
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self.load_version_warning_printed = False
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self.save_version_warning_printed = False
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@classmethod
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def set_strategy(cls, strategy):
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if cls._strategy is not None:
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raise RuntimeError(f"Internal error. {cls.__name__} strategy is already set")
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cls._strategy = strategy
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@classmethod
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def get_strategy(cls) -> Optional["LatentsCachingStrategy"]:
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return cls._strategy
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@property
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def architecture(self):
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return self._architecture
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@property
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def latents_stride(self):
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return self._latents_stride
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@property
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def cache_to_disk(self):
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return self._cache_to_disk
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@property
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def batch_size(self):
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return self._batch_size
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@property
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def cache_suffix(self):
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return f"_{self.architecture.lower()}.safetensors"
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def get_image_size_from_disk_cache_path(self, absolute_path: str, cache_path: str) -> Tuple[Optional[int], Optional[int]]:
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w, h = os.path.splitext(cache_path)[0].rsplit("_", 2)[-2].split("x")
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return int(w), int(h)
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def get_latents_cache_path(self, absolute_path: str, image_size: Tuple[int, int]) -> str:
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return os.path.splitext(absolute_path)[0] + f"_{image_size[0]:04d}x{image_size[1]:04d}" + self.cache_suffix
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def is_disk_cached_latents_expected(
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self,
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bucket_reso: Tuple[int, int],
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cache_path: str,
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flip_aug: bool,
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alpha_mask: bool,
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preferred_dtype: Optional[Union[str, torch.dtype]],
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) -> bool:
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raise NotImplementedError
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def cache_batch_latents(self, model: Any, batch: List, flip_aug: bool, alpha_mask: bool, random_crop: bool):
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raise NotImplementedError
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def get_key_suffix(
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self,
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bucket_reso: Optional[Tuple[int, int]] = None,
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latents_size: Optional[Tuple[int, int]] = None,
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dtype: Optional[Union[str, torch.dtype]] = None,
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) -> str:
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"""
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if dtype is None, it returns "_32x64" for example.
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"""
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if latents_size is not None:
|
||
expected_latents_size = latents_size # H, W
|
||
else:
|
||
# bucket_reso is (W, H)
|
||
expected_latents_size = (bucket_reso[1] // self.latents_stride, bucket_reso[0] // self.latents_stride) # H, W
|
||
|
||
if dtype is None:
|
||
dtype_suffix = ""
|
||
else:
|
||
dtype_suffix = "_" + utils.dtype_to_normalized_str(dtype)
|
||
|
||
# e.g. "_32x64_float16", HxW, dtype
|
||
key_suffix = f"_{expected_latents_size[0]}x{expected_latents_size[1]}{dtype_suffix}"
|
||
|
||
return key_suffix
|
||
|
||
def get_compatible_latents_keys(
|
||
self,
|
||
keys: set[str],
|
||
dtype: Union[str, torch.dtype],
|
||
flip_aug: bool,
|
||
bucket_reso: Optional[Tuple[int, int]] = None,
|
||
latents_size: Optional[Tuple[int, int]] = None,
|
||
) -> Tuple[Optional[str], Optional[str]]:
|
||
"""
|
||
bucket_reso is (W, H), latents_size is (H, W)
|
||
"""
|
||
|
||
latents_key = None
|
||
flipped_latents_key = None
|
||
|
||
compatible_dtypes = get_compatible_dtypes(dtype)
|
||
|
||
for compat_dtype in compatible_dtypes:
|
||
key_suffix = self.get_key_suffix(bucket_reso, latents_size, compat_dtype)
|
||
|
||
if latents_key is None:
|
||
latents_key = "latents" + key_suffix
|
||
if latents_key not in keys:
|
||
latents_key = None
|
||
if flip_aug and flipped_latents_key is None:
|
||
flipped_latents_key = "latents_flipped" + key_suffix
|
||
if flipped_latents_key not in keys:
|
||
flipped_latents_key = None
|
||
|
||
if latents_key is not None and (flipped_latents_key is not None or not flip_aug):
|
||
break
|
||
|
||
return latents_key, flipped_latents_key
|
||
|
||
def _default_is_disk_cached_latents_expected(
|
||
self,
|
||
bucket_reso: Tuple[int, int],
|
||
latents_cache_path: str,
|
||
flip_aug: bool,
|
||
alpha_mask: bool,
|
||
preferred_dtype: Optional[Union[str, torch.dtype]],
|
||
):
|
||
# multi_resolution is always enabled for any strategy
|
||
if not self.cache_to_disk:
|
||
return False
|
||
if not os.path.exists(latents_cache_path):
|
||
return False
|
||
if self.skip_disk_cache_validity_check:
|
||
return True
|
||
|
||
key_suffix_without_dtype = self.get_key_suffix(bucket_reso=bucket_reso, dtype=None)
|
||
|
||
try:
|
||
# safe_open locks the file, so we cannot use it for checking keys
|
||
# with safe_open(latents_cache_path, framework="pt") as f:
|
||
# keys = f.keys()
|
||
with utils.MemoryEfficientSafeOpen(latents_cache_path) as f:
|
||
keys = f.keys()
|
||
|
||
if alpha_mask and "alpha_mask" + key_suffix_without_dtype not in keys:
|
||
# print(f"alpha_mask not found: {latents_cache_path}")
|
||
return False
|
||
|
||
if preferred_dtype is None:
|
||
# remove dtype suffix from keys, because any dtype is acceptable
|
||
keys = [key.rsplit("_", 1)[0] for key in keys if not key.endswith(key_suffix_without_dtype)]
|
||
keys = set(keys)
|
||
if "latents" + key_suffix_without_dtype not in keys:
|
||
# print(f"No preferred: latents {key_suffix_without_dtype} not found: {latents_cache_path}")
|
||
return False
|
||
if flip_aug and "latents_flipped" + key_suffix_without_dtype not in keys:
|
||
# print(f"No preferred: latents_flipped {key_suffix_without_dtype} not found: {latents_cache_path}")
|
||
return False
|
||
else:
|
||
# specific dtype or compatible dtype is required
|
||
latents_key, flipped_latents_key = self.get_compatible_latents_keys(
|
||
keys, preferred_dtype, flip_aug, bucket_reso=bucket_reso
|
||
)
|
||
if latents_key is None or (flip_aug and flipped_latents_key is None):
|
||
# print(f"Precise dtype not found: {latents_cache_path}")
|
||
return False
|
||
except Exception as e:
|
||
logger.error(f"Error loading file: {latents_cache_path}")
|
||
raise e
|
||
|
||
return True
|
||
|
||
# TODO remove circular dependency for ImageInfo
|
||
def _default_cache_batch_latents(
|
||
self, encode_by_vae, vae_device, vae_dtype, image_infos: List, flip_aug: bool, alpha_mask: bool, random_crop: bool
|
||
):
|
||
"""
|
||
Default implementation for cache_batch_latents. Image loading, VAE, flipping, alpha mask handling are common.
|
||
"""
|
||
from library import train_util # import here to avoid circular import
|
||
|
||
img_tensor, alpha_masks, original_sizes, crop_ltrbs = train_util.load_images_and_masks_for_caching(
|
||
image_infos, alpha_mask, random_crop
|
||
)
|
||
img_tensor = img_tensor.to(device=vae_device, dtype=vae_dtype)
|
||
|
||
with torch.no_grad():
|
||
latents_tensors = encode_by_vae(img_tensor).to("cpu")
|
||
if flip_aug:
|
||
img_tensor = torch.flip(img_tensor, dims=[3])
|
||
with torch.no_grad():
|
||
flipped_latents = encode_by_vae(img_tensor).to("cpu")
|
||
else:
|
||
flipped_latents = [None] * len(latents_tensors)
|
||
|
||
# for info, latents, flipped_latent, alpha_mask in zip(image_infos, latents_tensors, flipped_latents, alpha_masks):
|
||
for i in range(len(image_infos)):
|
||
info = image_infos[i]
|
||
latents = latents_tensors[i]
|
||
flipped_latent = flipped_latents[i]
|
||
alpha_mask = alpha_masks[i]
|
||
original_size = original_sizes[i]
|
||
crop_ltrb = crop_ltrbs[i]
|
||
|
||
if self.cache_to_disk:
|
||
self.save_latents_to_disk(info.latents_cache_path, latents, original_size, crop_ltrb, flipped_latent, alpha_mask)
|
||
else:
|
||
info.latents_original_size = original_size
|
||
info.latents_crop_ltrb = crop_ltrb
|
||
info.latents = latents
|
||
if flip_aug:
|
||
info.latents_flipped = flipped_latent
|
||
info.alpha_mask = alpha_mask
|
||
|
||
def load_latents_from_disk(
|
||
self, cache_path: str, bucket_reso: Tuple[int, int]
|
||
) -> Tuple[torch.Tensor, List[int], List[int], Optional[torch.Tensor], Optional[torch.Tensor]]:
|
||
raise NotImplementedError
|
||
|
||
def _default_load_latents_from_disk(
|
||
self, cache_path: str, bucket_reso: Tuple[int, int]
|
||
) -> Tuple[torch.Tensor, List[int], List[int], Optional[torch.Tensor], Optional[torch.Tensor]]:
|
||
with safe_open(cache_path, framework="pt") as f:
|
||
metadata = f.metadata()
|
||
version = metadata.get("format_version", "0.0.0")
|
||
major, minor, patch = map(int, version.split("."))
|
||
if major > 1: # or (major == 1 and minor > 0):
|
||
if not self.load_version_warning_printed:
|
||
self.load_version_warning_printed = True
|
||
logger.warning(
|
||
f"Existing latents cache file has a higher version {version} for {cache_path}. This may cause issues."
|
||
)
|
||
|
||
keys = f.keys()
|
||
|
||
latents_key, flipped_latents_key = self.get_compatible_latents_keys(keys, None, flip_aug=True, bucket_reso=bucket_reso)
|
||
|
||
key_suffix_without_dtype = self.get_key_suffix(bucket_reso=bucket_reso, dtype=None)
|
||
alpha_mask_key = "alpha_mask" + key_suffix_without_dtype
|
||
|
||
latents = f.get_tensor(latents_key)
|
||
flipped_latents = f.get_tensor(flipped_latents_key) if flipped_latents_key is not None else None
|
||
alpha_mask = f.get_tensor(alpha_mask_key) if alpha_mask_key in keys else None
|
||
|
||
original_size = [int(metadata["width"]), int(metadata["height"])]
|
||
crop_ltrb = metadata[f"crop_ltrb" + key_suffix_without_dtype]
|
||
crop_ltrb = list(map(int, crop_ltrb.split(",")))
|
||
|
||
return latents, original_size, crop_ltrb, flipped_latents, alpha_mask
|
||
|
||
def save_latents_to_disk(
|
||
self,
|
||
cache_path: str,
|
||
latents_tensor: torch.Tensor,
|
||
original_size: Tuple[int, int],
|
||
crop_ltrb: List[int],
|
||
flipped_latents_tensor: Optional[torch.Tensor] = None,
|
||
alpha_mask: Optional[torch.Tensor] = None,
|
||
):
|
||
dtype = latents_tensor.dtype
|
||
latents_size = latents_tensor.shape[1:3] # H, W
|
||
tensor_dict = {}
|
||
|
||
overwrite = False
|
||
if os.path.exists(cache_path):
|
||
# load existing safetensors and update it
|
||
overwrite = True
|
||
|
||
# we cannot use safe_open here because it locks the file
|
||
# with safe_open(cache_path, framework="pt") as f:
|
||
with utils.MemoryEfficientSafeOpen(cache_path) as f:
|
||
metadata = f.metadata()
|
||
keys = f.keys()
|
||
for key in keys:
|
||
tensor_dict[key] = f.get_tensor(key)
|
||
assert metadata["architecture"] == self.architecture
|
||
|
||
file_version = metadata.get("format_version", "0.0.0")
|
||
major, minor, patch = map(int, file_version.split("."))
|
||
if major > 1 or (major == 1 and minor > 0):
|
||
self.save_version_warning_printed = True
|
||
logger.warning(
|
||
f"Existing latents cache file has a higher version {file_version} for {cache_path}. This may cause issues."
|
||
)
|
||
else:
|
||
metadata = {}
|
||
metadata["architecture"] = self.architecture
|
||
metadata["width"] = f"{original_size[0]}"
|
||
metadata["height"] = f"{original_size[1]}"
|
||
metadata["format_version"] = "1.0.0"
|
||
|
||
metadata[f"crop_ltrb_{latents_size[0]}x{latents_size[1]}"] = ",".join(map(str, crop_ltrb))
|
||
|
||
key_suffix = self.get_key_suffix(latents_size=latents_size, dtype=dtype)
|
||
if latents_tensor is not None:
|
||
tensor_dict["latents" + key_suffix] = latents_tensor
|
||
if flipped_latents_tensor is not None:
|
||
tensor_dict["latents_flipped" + key_suffix] = flipped_latents_tensor
|
||
if alpha_mask is not None:
|
||
key_suffix_without_dtype = self.get_key_suffix(latents_size=latents_size, dtype=None)
|
||
tensor_dict["alpha_mask" + key_suffix_without_dtype] = alpha_mask
|
||
|
||
# remove lower precision latents if higher precision latents are already cached
|
||
if overwrite:
|
||
available_dtypes = get_available_dtypes()
|
||
available_itemsize = None
|
||
available_itemsize_flipped = None
|
||
for dtype in available_dtypes:
|
||
key_suffix = self.get_key_suffix(latents_size=latents_size, dtype=dtype)
|
||
if "latents" + key_suffix in tensor_dict:
|
||
if available_itemsize is None:
|
||
available_itemsize = dtype.itemsize
|
||
elif available_itemsize > dtype.itemsize:
|
||
# if higher precision latents are already cached, remove lower precision latents
|
||
del tensor_dict["latents" + key_suffix]
|
||
|
||
if "latents_flipped" + key_suffix in tensor_dict:
|
||
if available_itemsize_flipped is None:
|
||
available_itemsize_flipped = dtype.itemsize
|
||
elif available_itemsize_flipped > dtype.itemsize:
|
||
del tensor_dict["latents_flipped" + key_suffix]
|
||
|
||
save_file(tensor_dict, cache_path, metadata=metadata)
|