mirror of
https://github.com/invoke-ai/InvokeAI
synced 2024-08-30 20:32:17 +00:00
239 lines
8.3 KiB
Python
239 lines
8.3 KiB
Python
from typing import Literal, Optional, Union
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from pydantic import BaseModel, Field
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from contextlib import ExitStack
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from .baseinvocation import BaseInvocation, BaseInvocationOutput, InvocationContext, InvocationConfig
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from .model import ClipField
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from ...backend.util.devices import choose_torch_device, torch_dtype
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from ...backend.stable_diffusion.diffusion import InvokeAIDiffuserComponent
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from ...backend.stable_diffusion.textual_inversion_manager import TextualInversionManager
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from ...backend.model_management.lora import LoRAHelper
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from compel import Compel
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from compel.prompt_parser import (
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Blend,
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CrossAttentionControlSubstitute,
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FlattenedPrompt,
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Fragment,
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)
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class ConditioningField(BaseModel):
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conditioning_name: Optional[str] = Field(default=None, description="The name of conditioning data")
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class Config:
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schema_extra = {"required": ["conditioning_name"]}
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class CompelOutput(BaseInvocationOutput):
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"""Compel parser output"""
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#fmt: off
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type: Literal["compel_output"] = "compel_output"
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conditioning: ConditioningField = Field(default=None, description="Conditioning")
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#fmt: on
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class CompelInvocation(BaseInvocation):
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"""Parse prompt using compel package to conditioning."""
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type: Literal["compel"] = "compel"
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prompt: str = Field(default="", description="Prompt")
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clip: ClipField = Field(None, description="Clip to use")
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# Schema customisation
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class Config(InvocationConfig):
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schema_extra = {
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"ui": {
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"title": "Prompt (Compel)",
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"tags": ["prompt", "compel"],
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"type_hints": {
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"model": "model"
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}
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},
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}
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def invoke(self, context: InvocationContext) -> CompelOutput:
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text_encoder_info = context.services.model_manager.get_model(
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**self.clip.text_encoder.dict(),
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)
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tokenizer_info = context.services.model_manager.get_model(
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**self.clip.tokenizer.dict(),
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)
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with text_encoder_info as text_encoder,\
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tokenizer_info as tokenizer,\
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ExitStack() as stack:
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loras = [(stack.enter_context(context.services.model_manager.get_model(**lora.dict(exclude={"weight"}))), lora.weight) for lora in self.clip.loras]
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# TODO: global? input?
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#use_full_precision = precision == "float32" or precision == "autocast"
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#use_full_precision = False
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# TODO: redo TI when separate model loding implemented
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#textual_inversion_manager = TextualInversionManager(
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# tokenizer=tokenizer,
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# text_encoder=text_encoder,
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# full_precision=use_full_precision,
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#)
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compel = Compel(
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tokenizer=tokenizer,
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text_encoder=text_encoder,
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textual_inversion_manager=None,
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dtype_for_device_getter=torch_dtype,
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truncate_long_prompts=True, # TODO:
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)
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# TODO: support legacy blend?
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conjunction = Compel.parse_prompt_string(self.prompt)
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prompt: Union[FlattenedPrompt, Blend] = conjunction.prompts[0]
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if context.services.configuration.log_tokenization:
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log_tokenization_for_prompt_object(prompt, tokenizer)
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with LoRAHelper.apply_lora_text_encoder(text_encoder, loras):
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c, options = compel.build_conditioning_tensor_for_prompt_object(prompt)
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# TODO: long prompt support
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#if not self.truncate_long_prompts:
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# [c, uc] = compel.pad_conditioning_tensors_to_same_length([c, uc])
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ec = InvokeAIDiffuserComponent.ExtraConditioningInfo(
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tokens_count_including_eos_bos=get_max_token_count(tokenizer, prompt),
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cross_attention_control_args=options.get("cross_attention_control", None),
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)
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conditioning_name = f"{context.graph_execution_state_id}_{self.id}_conditioning"
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# TODO: hacky but works ;D maybe rename latents somehow?
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context.services.latents.save(conditioning_name, (c, ec))
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return CompelOutput(
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conditioning=ConditioningField(
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conditioning_name=conditioning_name,
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),
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)
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def get_max_token_count(
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tokenizer, prompt: Union[FlattenedPrompt, Blend], truncate_if_too_long=False
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) -> int:
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if type(prompt) is Blend:
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blend: Blend = prompt
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return max(
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[
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get_max_token_count(tokenizer, c, truncate_if_too_long)
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for c in blend.prompts
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]
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)
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else:
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return len(
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get_tokens_for_prompt_object(tokenizer, prompt, truncate_if_too_long)
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)
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def get_tokens_for_prompt_object(
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tokenizer, parsed_prompt: FlattenedPrompt, truncate_if_too_long=True
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) -> [str]:
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if type(parsed_prompt) is Blend:
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raise ValueError(
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"Blend is not supported here - you need to get tokens for each of its .children"
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)
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text_fragments = [
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x.text
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if type(x) is Fragment
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else (
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" ".join([f.text for f in x.original])
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if type(x) is CrossAttentionControlSubstitute
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else str(x)
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)
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for x in parsed_prompt.children
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]
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text = " ".join(text_fragments)
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tokens = tokenizer.tokenize(text)
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if truncate_if_too_long:
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max_tokens_length = tokenizer.model_max_length - 2 # typically 75
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tokens = tokens[0:max_tokens_length]
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return tokens
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def log_tokenization_for_prompt_object(
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p: Union[Blend, FlattenedPrompt], tokenizer, display_label_prefix=None
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):
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display_label_prefix = display_label_prefix or ""
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if type(p) is Blend:
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blend: Blend = p
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for i, c in enumerate(blend.prompts):
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log_tokenization_for_prompt_object(
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c,
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tokenizer,
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display_label_prefix=f"{display_label_prefix}(blend part {i + 1}, weight={blend.weights[i]})",
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)
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elif type(p) is FlattenedPrompt:
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flattened_prompt: FlattenedPrompt = p
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if flattened_prompt.wants_cross_attention_control:
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original_fragments = []
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edited_fragments = []
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for f in flattened_prompt.children:
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if type(f) is CrossAttentionControlSubstitute:
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original_fragments += f.original
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edited_fragments += f.edited
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else:
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original_fragments.append(f)
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edited_fragments.append(f)
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original_text = " ".join([x.text for x in original_fragments])
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log_tokenization_for_text(
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original_text,
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tokenizer,
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display_label=f"{display_label_prefix}(.swap originals)",
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)
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edited_text = " ".join([x.text for x in edited_fragments])
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log_tokenization_for_text(
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edited_text,
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tokenizer,
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display_label=f"{display_label_prefix}(.swap replacements)",
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)
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else:
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text = " ".join([x.text for x in flattened_prompt.children])
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log_tokenization_for_text(
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text, tokenizer, display_label=display_label_prefix
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)
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def log_tokenization_for_text(text, tokenizer, display_label=None, truncate_if_too_long=False):
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"""shows how the prompt is tokenized
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# usually tokens have '</w>' to indicate end-of-word,
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# but for readability it has been replaced with ' '
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"""
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tokens = tokenizer.tokenize(text)
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tokenized = ""
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discarded = ""
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usedTokens = 0
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totalTokens = len(tokens)
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for i in range(0, totalTokens):
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token = tokens[i].replace("</w>", " ")
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# alternate color
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s = (usedTokens % 6) + 1
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if truncate_if_too_long and i >= tokenizer.model_max_length:
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discarded = discarded + f"\x1b[0;3{s};40m{token}"
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else:
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tokenized = tokenized + f"\x1b[0;3{s};40m{token}"
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usedTokens += 1
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if usedTokens > 0:
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print(f'\n>> [TOKENLOG] Tokens {display_label or ""} ({usedTokens}):')
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print(f"{tokenized}\x1b[0m")
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if discarded != "":
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print(f"\n>> [TOKENLOG] Tokens Discarded ({totalTokens - usedTokens}):")
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print(f"{discarded}\x1b[0m")
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