mirror of
https://github.com/invoke-ai/InvokeAI.git
synced 2026-01-23 13:28:00 -05:00
570 lines
25 KiB
Python
570 lines
25 KiB
Python
from __future__ import annotations
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import math
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from contextlib import contextmanager
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from typing import Any, Callable, Optional, Union
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import torch
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from diffusers import UNet2DConditionModel
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from typing_extensions import TypeAlias
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from invokeai.app.services.config import InvokeAIAppConfig
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from invokeai.backend.stable_diffusion.diffusion.conditioning_data import (
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ConditioningData,
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ExtraConditioningInfo,
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PostprocessingSettings,
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SDXLConditioningInfo,
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)
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from .cross_attention_control import (
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CrossAttentionType,
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CrossAttnControlContext,
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SwapCrossAttnContext,
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setup_cross_attention_control_attention_processors,
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)
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ModelForwardCallback: TypeAlias = Union[
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# x, t, conditioning, Optional[cross-attention kwargs]
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Callable[
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[torch.Tensor, torch.Tensor, torch.Tensor, Optional[dict[str, Any]]],
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torch.Tensor,
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],
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Callable[[torch.Tensor, torch.Tensor, torch.Tensor], torch.Tensor],
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]
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class InvokeAIDiffuserComponent:
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"""
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The aim of this component is to provide a single place for code that can be applied identically to
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all InvokeAI diffusion procedures.
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At the moment it includes the following features:
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* Cross attention control ("prompt2prompt")
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* Hybrid conditioning (used for inpainting)
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"""
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debug_thresholding = False
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sequential_guidance = False
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def __init__(
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self,
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model,
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model_forward_callback: ModelForwardCallback,
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):
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"""
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:param model: the unet model to pass through to cross attention control
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:param model_forward_callback: a lambda with arguments (x, sigma, conditioning_to_apply). will be called repeatedly. most likely, this should simply call model.forward(x, sigma, conditioning)
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"""
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config = InvokeAIAppConfig.get_config()
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self.conditioning = None
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self.model = model
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self.model_forward_callback = model_forward_callback
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self.cross_attention_control_context = None
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self.sequential_guidance = config.sequential_guidance
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@contextmanager
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def custom_attention_context(
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self,
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unet: UNet2DConditionModel,
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extra_conditioning_info: Optional[ExtraConditioningInfo],
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):
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old_attn_processors = unet.attn_processors
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try:
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self.cross_attention_control_context = CrossAttnControlContext(
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arguments=extra_conditioning_info.cross_attention_control_args,
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)
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setup_cross_attention_control_attention_processors(
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unet,
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self.cross_attention_control_context,
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)
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yield None
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finally:
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self.cross_attention_control_context = None
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unet.set_attn_processor(old_attn_processors)
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def do_controlnet_step(
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self,
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control_data,
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sample: torch.Tensor,
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timestep: torch.Tensor,
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step_index: int,
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total_step_count: int,
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conditioning_data,
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):
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down_block_res_samples, mid_block_res_sample = None, None
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# control_data should be type List[ControlNetData]
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# this loop covers both ControlNet (one ControlNetData in list)
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# and MultiControlNet (multiple ControlNetData in list)
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for _i, control_datum in enumerate(control_data):
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control_mode = control_datum.control_mode
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# soft_injection and cfg_injection are the two ControlNet control_mode booleans
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# that are combined at higher level to make control_mode enum
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# soft_injection determines whether to do per-layer re-weighting adjustment (if True)
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# or default weighting (if False)
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soft_injection = control_mode == "more_prompt" or control_mode == "more_control"
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# cfg_injection = determines whether to apply ControlNet to only the conditional (if True)
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# or the default both conditional and unconditional (if False)
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cfg_injection = control_mode == "more_control" or control_mode == "unbalanced"
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first_control_step = math.floor(control_datum.begin_step_percent * total_step_count)
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last_control_step = math.ceil(control_datum.end_step_percent * total_step_count)
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# only apply controlnet if current step is within the controlnet's begin/end step range
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if step_index >= first_control_step and step_index <= last_control_step:
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if cfg_injection:
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sample_model_input = sample
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else:
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# expand the latents input to control model if doing classifier free guidance
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# (which I think for now is always true, there is conditional elsewhere that stops execution if
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# classifier_free_guidance is <= 1.0 ?)
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sample_model_input = torch.cat([sample] * 2)
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added_cond_kwargs = None
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if cfg_injection: # only applying ControlNet to conditional instead of in unconditioned
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if type(conditioning_data.text_embeddings) is SDXLConditioningInfo:
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added_cond_kwargs = {
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"text_embeds": conditioning_data.text_embeddings.pooled_embeds,
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"time_ids": conditioning_data.text_embeddings.add_time_ids,
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}
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encoder_hidden_states = conditioning_data.text_embeddings.embeds
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encoder_attention_mask = None
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else:
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if type(conditioning_data.text_embeddings) is SDXLConditioningInfo:
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added_cond_kwargs = {
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"text_embeds": torch.cat(
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[
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# TODO: how to pad? just by zeros? or even truncate?
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conditioning_data.unconditioned_embeddings.pooled_embeds,
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conditioning_data.text_embeddings.pooled_embeds,
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],
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dim=0,
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),
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"time_ids": torch.cat(
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[
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conditioning_data.unconditioned_embeddings.add_time_ids,
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conditioning_data.text_embeddings.add_time_ids,
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],
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dim=0,
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),
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}
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(
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encoder_hidden_states,
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encoder_attention_mask,
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) = self._concat_conditionings_for_batch(
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conditioning_data.unconditioned_embeddings.embeds,
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conditioning_data.text_embeddings.embeds,
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)
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if isinstance(control_datum.weight, list):
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# if controlnet has multiple weights, use the weight for the current step
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controlnet_weight = control_datum.weight[step_index]
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else:
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# if controlnet has a single weight, use it for all steps
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controlnet_weight = control_datum.weight
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# controlnet(s) inference
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down_samples, mid_sample = control_datum.model(
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sample=sample_model_input,
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timestep=timestep,
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encoder_hidden_states=encoder_hidden_states,
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controlnet_cond=control_datum.image_tensor,
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conditioning_scale=controlnet_weight, # controlnet specific, NOT the guidance scale
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encoder_attention_mask=encoder_attention_mask,
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added_cond_kwargs=added_cond_kwargs,
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guess_mode=soft_injection, # this is still called guess_mode in diffusers ControlNetModel
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return_dict=False,
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)
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if cfg_injection:
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# Inferred ControlNet only for the conditional batch.
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# To apply the output of ControlNet to both the unconditional and conditional batches,
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# prepend zeros for unconditional batch
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down_samples = [torch.cat([torch.zeros_like(d), d]) for d in down_samples]
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mid_sample = torch.cat([torch.zeros_like(mid_sample), mid_sample])
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if down_block_res_samples is None and mid_block_res_sample is None:
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down_block_res_samples, mid_block_res_sample = down_samples, mid_sample
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else:
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# add controlnet outputs together if have multiple controlnets
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down_block_res_samples = [
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samples_prev + samples_curr
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for samples_prev, samples_curr in zip(down_block_res_samples, down_samples, strict=True)
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]
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mid_block_res_sample += mid_sample
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return down_block_res_samples, mid_block_res_sample
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def do_unet_step(
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self,
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sample: torch.Tensor,
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timestep: torch.Tensor,
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conditioning_data: ConditioningData,
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step_index: int,
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total_step_count: int,
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down_block_additional_residuals: Optional[torch.Tensor] = None, # for ControlNet
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mid_block_additional_residual: Optional[torch.Tensor] = None, # for ControlNet
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down_intrablock_additional_residuals: Optional[torch.Tensor] = None, # for T2I-Adapter
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):
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cross_attention_control_types_to_do = []
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if self.cross_attention_control_context is not None:
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percent_through = step_index / total_step_count
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cross_attention_control_types_to_do = (
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self.cross_attention_control_context.get_active_cross_attention_control_types_for_step(percent_through)
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)
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wants_cross_attention_control = len(cross_attention_control_types_to_do) > 0
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if wants_cross_attention_control or self.sequential_guidance:
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# If wants_cross_attention_control is True, we force the sequential mode to be used, because cross-attention
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# control is currently only supported in sequential mode.
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(
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unconditioned_next_x,
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conditioned_next_x,
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) = self._apply_standard_conditioning_sequentially(
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x=sample,
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sigma=timestep,
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conditioning_data=conditioning_data,
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cross_attention_control_types_to_do=cross_attention_control_types_to_do,
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down_block_additional_residuals=down_block_additional_residuals,
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mid_block_additional_residual=mid_block_additional_residual,
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down_intrablock_additional_residuals=down_intrablock_additional_residuals,
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)
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else:
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(
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unconditioned_next_x,
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conditioned_next_x,
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) = self._apply_standard_conditioning(
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x=sample,
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sigma=timestep,
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conditioning_data=conditioning_data,
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down_block_additional_residuals=down_block_additional_residuals,
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mid_block_additional_residual=mid_block_additional_residual,
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down_intrablock_additional_residuals=down_intrablock_additional_residuals,
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)
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return unconditioned_next_x, conditioned_next_x
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def do_latent_postprocessing(
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self,
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postprocessing_settings: PostprocessingSettings,
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latents: torch.Tensor,
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sigma,
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step_index,
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total_step_count,
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) -> torch.Tensor:
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if postprocessing_settings is not None:
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percent_through = step_index / total_step_count
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latents = self.apply_symmetry(postprocessing_settings, latents, percent_through)
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return latents
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def _concat_conditionings_for_batch(self, unconditioning, conditioning):
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def _pad_conditioning(cond, target_len, encoder_attention_mask):
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conditioning_attention_mask = torch.ones(
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(cond.shape[0], cond.shape[1]), device=cond.device, dtype=cond.dtype
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)
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if cond.shape[1] < max_len:
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conditioning_attention_mask = torch.cat(
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[
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conditioning_attention_mask,
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torch.zeros((cond.shape[0], max_len - cond.shape[1]), device=cond.device, dtype=cond.dtype),
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],
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dim=1,
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)
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cond = torch.cat(
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[
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cond,
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torch.zeros(
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(cond.shape[0], max_len - cond.shape[1], cond.shape[2]),
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device=cond.device,
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dtype=cond.dtype,
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),
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],
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dim=1,
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)
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if encoder_attention_mask is None:
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encoder_attention_mask = conditioning_attention_mask
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else:
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encoder_attention_mask = torch.cat(
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[
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encoder_attention_mask,
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conditioning_attention_mask,
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]
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)
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return cond, encoder_attention_mask
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encoder_attention_mask = None
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if unconditioning.shape[1] != conditioning.shape[1]:
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max_len = max(unconditioning.shape[1], conditioning.shape[1])
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unconditioning, encoder_attention_mask = _pad_conditioning(unconditioning, max_len, encoder_attention_mask)
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conditioning, encoder_attention_mask = _pad_conditioning(conditioning, max_len, encoder_attention_mask)
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return torch.cat([unconditioning, conditioning]), encoder_attention_mask
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# methods below are called from do_diffusion_step and should be considered private to this class.
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def _apply_standard_conditioning(
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self,
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x,
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sigma,
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conditioning_data: ConditioningData,
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down_block_additional_residuals: Optional[torch.Tensor] = None, # for ControlNet
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mid_block_additional_residual: Optional[torch.Tensor] = None, # for ControlNet
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down_intrablock_additional_residuals: Optional[torch.Tensor] = None, # for T2I-Adapter
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):
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"""Runs the conditioned and unconditioned UNet forward passes in a single batch for faster inference speed at
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the cost of higher memory usage.
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"""
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x_twice = torch.cat([x] * 2)
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sigma_twice = torch.cat([sigma] * 2)
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cross_attention_kwargs = None
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if conditioning_data.ip_adapter_conditioning is not None:
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# Note that we 'stack' to produce tensors of shape (batch_size, num_ip_images, seq_len, token_len).
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cross_attention_kwargs = {
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"ip_adapter_image_prompt_embeds": [
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torch.stack(
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[ipa_conditioning.uncond_image_prompt_embeds, ipa_conditioning.cond_image_prompt_embeds]
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)
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for ipa_conditioning in conditioning_data.ip_adapter_conditioning
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]
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}
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added_cond_kwargs = None
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if type(conditioning_data.text_embeddings) is SDXLConditioningInfo:
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added_cond_kwargs = {
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"text_embeds": torch.cat(
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[
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# TODO: how to pad? just by zeros? or even truncate?
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conditioning_data.unconditioned_embeddings.pooled_embeds,
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conditioning_data.text_embeddings.pooled_embeds,
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],
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dim=0,
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),
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"time_ids": torch.cat(
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[
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conditioning_data.unconditioned_embeddings.add_time_ids,
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conditioning_data.text_embeddings.add_time_ids,
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],
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dim=0,
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),
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}
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both_conditionings, encoder_attention_mask = self._concat_conditionings_for_batch(
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conditioning_data.unconditioned_embeddings.embeds, conditioning_data.text_embeddings.embeds
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)
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both_results = self.model_forward_callback(
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x_twice,
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sigma_twice,
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both_conditionings,
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cross_attention_kwargs=cross_attention_kwargs,
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encoder_attention_mask=encoder_attention_mask,
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down_block_additional_residuals=down_block_additional_residuals,
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mid_block_additional_residual=mid_block_additional_residual,
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down_intrablock_additional_residuals=down_intrablock_additional_residuals,
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added_cond_kwargs=added_cond_kwargs,
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)
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unconditioned_next_x, conditioned_next_x = both_results.chunk(2)
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return unconditioned_next_x, conditioned_next_x
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def _apply_standard_conditioning_sequentially(
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self,
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x: torch.Tensor,
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sigma,
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conditioning_data: ConditioningData,
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cross_attention_control_types_to_do: list[CrossAttentionType],
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down_block_additional_residuals: Optional[torch.Tensor] = None, # for ControlNet
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mid_block_additional_residual: Optional[torch.Tensor] = None, # for ControlNet
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down_intrablock_additional_residuals: Optional[torch.Tensor] = None, # for T2I-Adapter
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):
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"""Runs the conditioned and unconditioned UNet forward passes sequentially for lower memory usage at the cost of
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slower execution speed.
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"""
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# Since we are running the conditioned and unconditioned passes sequentially, we need to split the ControlNet
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# and T2I-Adapter residuals into two chunks.
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uncond_down_block, cond_down_block = None, None
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if down_block_additional_residuals is not None:
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uncond_down_block, cond_down_block = [], []
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for down_block in down_block_additional_residuals:
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_uncond_down, _cond_down = down_block.chunk(2)
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uncond_down_block.append(_uncond_down)
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cond_down_block.append(_cond_down)
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uncond_down_intrablock, cond_down_intrablock = None, None
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if down_intrablock_additional_residuals is not None:
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uncond_down_intrablock, cond_down_intrablock = [], []
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for down_intrablock in down_intrablock_additional_residuals:
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_uncond_down, _cond_down = down_intrablock.chunk(2)
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uncond_down_intrablock.append(_uncond_down)
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cond_down_intrablock.append(_cond_down)
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uncond_mid_block, cond_mid_block = None, None
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if mid_block_additional_residual is not None:
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uncond_mid_block, cond_mid_block = mid_block_additional_residual.chunk(2)
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# If cross-attention control is enabled, prepare the SwapCrossAttnContext.
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cross_attn_processor_context = None
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if self.cross_attention_control_context is not None:
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# Note that the SwapCrossAttnContext is initialized with an empty list of cross_attention_types_to_do.
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# This list is empty because cross-attention control is not applied in the unconditioned pass. This field
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# will be populated before the conditioned pass.
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cross_attn_processor_context = SwapCrossAttnContext(
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modified_text_embeddings=self.cross_attention_control_context.arguments.edited_conditioning,
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index_map=self.cross_attention_control_context.cross_attention_index_map,
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mask=self.cross_attention_control_context.cross_attention_mask,
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cross_attention_types_to_do=[],
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)
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#####################
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# Unconditioned pass
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#####################
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cross_attention_kwargs = None
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# Prepare IP-Adapter cross-attention kwargs for the unconditioned pass.
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if conditioning_data.ip_adapter_conditioning is not None:
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# Note that we 'unsqueeze' to produce tensors of shape (batch_size=1, num_ip_images, seq_len, token_len).
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cross_attention_kwargs = {
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"ip_adapter_image_prompt_embeds": [
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torch.unsqueeze(ipa_conditioning.uncond_image_prompt_embeds, dim=0)
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for ipa_conditioning in conditioning_data.ip_adapter_conditioning
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]
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}
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# Prepare cross-attention control kwargs for the unconditioned pass.
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if cross_attn_processor_context is not None:
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cross_attention_kwargs = {"swap_cross_attn_context": cross_attn_processor_context}
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# Prepare SDXL conditioning kwargs for the unconditioned pass.
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added_cond_kwargs = None
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is_sdxl = type(conditioning_data.text_embeddings) is SDXLConditioningInfo
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if is_sdxl:
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added_cond_kwargs = {
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"text_embeds": conditioning_data.unconditioned_embeddings.pooled_embeds,
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"time_ids": conditioning_data.unconditioned_embeddings.add_time_ids,
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}
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# Run unconditioned UNet denoising (i.e. negative prompt).
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unconditioned_next_x = self.model_forward_callback(
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x,
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sigma,
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conditioning_data.unconditioned_embeddings.embeds,
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cross_attention_kwargs=cross_attention_kwargs,
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down_block_additional_residuals=uncond_down_block,
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mid_block_additional_residual=uncond_mid_block,
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down_intrablock_additional_residuals=uncond_down_intrablock,
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added_cond_kwargs=added_cond_kwargs,
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)
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###################
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# Conditioned pass
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###################
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|
|
cross_attention_kwargs = None
|
|
|
|
# Prepare IP-Adapter cross-attention kwargs for the conditioned pass.
|
|
if conditioning_data.ip_adapter_conditioning is not None:
|
|
# Note that we 'unsqueeze' to produce tensors of shape (batch_size=1, num_ip_images, seq_len, token_len).
|
|
cross_attention_kwargs = {
|
|
"ip_adapter_image_prompt_embeds": [
|
|
torch.unsqueeze(ipa_conditioning.cond_image_prompt_embeds, dim=0)
|
|
for ipa_conditioning in conditioning_data.ip_adapter_conditioning
|
|
]
|
|
}
|
|
|
|
# Prepare cross-attention control kwargs for the conditioned pass.
|
|
if cross_attn_processor_context is not None:
|
|
cross_attn_processor_context.cross_attention_types_to_do = cross_attention_control_types_to_do
|
|
cross_attention_kwargs = {"swap_cross_attn_context": cross_attn_processor_context}
|
|
|
|
# Prepare SDXL conditioning kwargs for the conditioned pass.
|
|
added_cond_kwargs = None
|
|
if is_sdxl:
|
|
added_cond_kwargs = {
|
|
"text_embeds": conditioning_data.text_embeddings.pooled_embeds,
|
|
"time_ids": conditioning_data.text_embeddings.add_time_ids,
|
|
}
|
|
|
|
# Run conditioned UNet denoising (i.e. positive prompt).
|
|
conditioned_next_x = self.model_forward_callback(
|
|
x,
|
|
sigma,
|
|
conditioning_data.text_embeddings.embeds,
|
|
cross_attention_kwargs=cross_attention_kwargs,
|
|
down_block_additional_residuals=cond_down_block,
|
|
mid_block_additional_residual=cond_mid_block,
|
|
down_intrablock_additional_residuals=cond_down_intrablock,
|
|
added_cond_kwargs=added_cond_kwargs,
|
|
)
|
|
return unconditioned_next_x, conditioned_next_x
|
|
|
|
def _combine(self, unconditioned_next_x, conditioned_next_x, guidance_scale):
|
|
# to scale how much effect conditioning has, calculate the changes it does and then scale that
|
|
scaled_delta = (conditioned_next_x - unconditioned_next_x) * guidance_scale
|
|
combined_next_x = unconditioned_next_x + scaled_delta
|
|
return combined_next_x
|
|
|
|
def apply_symmetry(
|
|
self,
|
|
postprocessing_settings: PostprocessingSettings,
|
|
latents: torch.Tensor,
|
|
percent_through: float,
|
|
) -> torch.Tensor:
|
|
# Reset our last percent through if this is our first step.
|
|
if percent_through == 0.0:
|
|
self.last_percent_through = 0.0
|
|
|
|
if postprocessing_settings is None:
|
|
return latents
|
|
|
|
# Check for out of bounds
|
|
h_symmetry_time_pct = postprocessing_settings.h_symmetry_time_pct
|
|
if h_symmetry_time_pct is not None and (h_symmetry_time_pct <= 0.0 or h_symmetry_time_pct > 1.0):
|
|
h_symmetry_time_pct = None
|
|
|
|
v_symmetry_time_pct = postprocessing_settings.v_symmetry_time_pct
|
|
if v_symmetry_time_pct is not None and (v_symmetry_time_pct <= 0.0 or v_symmetry_time_pct > 1.0):
|
|
v_symmetry_time_pct = None
|
|
|
|
dev = latents.device.type
|
|
|
|
latents.to(device="cpu")
|
|
|
|
if (
|
|
h_symmetry_time_pct is not None
|
|
and self.last_percent_through < h_symmetry_time_pct
|
|
and percent_through >= h_symmetry_time_pct
|
|
):
|
|
# Horizontal symmetry occurs on the 3rd dimension of the latent
|
|
width = latents.shape[3]
|
|
x_flipped = torch.flip(latents, dims=[3])
|
|
latents = torch.cat(
|
|
[
|
|
latents[:, :, :, 0 : int(width / 2)],
|
|
x_flipped[:, :, :, int(width / 2) : int(width)],
|
|
],
|
|
dim=3,
|
|
)
|
|
|
|
if (
|
|
v_symmetry_time_pct is not None
|
|
and self.last_percent_through < v_symmetry_time_pct
|
|
and percent_through >= v_symmetry_time_pct
|
|
):
|
|
# Vertical symmetry occurs on the 2nd dimension of the latent
|
|
height = latents.shape[2]
|
|
y_flipped = torch.flip(latents, dims=[2])
|
|
latents = torch.cat(
|
|
[
|
|
latents[:, :, 0 : int(height / 2)],
|
|
y_flipped[:, :, int(height / 2) : int(height)],
|
|
],
|
|
dim=2,
|
|
)
|
|
|
|
self.last_percent_through = percent_through
|
|
return latents.to(device=dev)
|