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InvokeAI/invokeai/app/invocations/latent.py
psychedelicious c238a7f18b feat(api): chore: pydantic & fastapi upgrade 
Upgrade pydantic and fastapi to latest.

- pydantic~=2.4.2
- fastapi~=103.2
- fastapi-events~=0.9.1

**Big Changes**

There are a number of logic changes needed to support pydantic v2. Most changes are very simple, like using the new methods to serialized and deserialize models, but there are a few more complex changes.

**Invocations**

The biggest change relates to invocation creation, instantiation and validation.

Because pydantic v2 moves all validation logic into the rust pydantic-core, we may no longer directly stick our fingers into the validation pie.

Previously, we (ab)used models and fields to allow invocation fields to be optional at instantiation, but required when `invoke()` is called. We directly manipulated the fields and invocation models when calling `invoke()`.

With pydantic v2, this is much more involved. Changes to the python wrapper do not propagate down to the rust validation logic - you have to rebuild the model. This causes problem with concurrent access to the invocation classes and is not a free operation.

This logic has been totally refactored and we do not need to change the model any more. The details are in `baseinvocation.py`, in the `InputField` function and `BaseInvocation.invoke_internal()` method.

In the end, this implementation is cleaner.

**Invocation Fields**

In pydantic v2, you can no longer directly add or remove fields from a model.

Previously, we did this to add the `type` field to invocations.

**Invocation Decorators**

With pydantic v2, we instead use the imperative `create_model()` API to create a new model with the additional field. This is done in `baseinvocation.py` in the `invocation()` wrapper.

A similar technique is used for `invocation_output()`.

**Minor Changes**

There are a number of minor changes around the pydantic v2 models API.

**Protected `model_` Namespace**

All models' pydantic-provided methods and attributes are prefixed with `model_` and this is considered a protected namespace. This causes some conflict, because "model" means something to us, and we have a ton of pydantic models with attributes starting with "model_".

Forunately, there are no direct conflicts. However, in any pydantic model where we define an attribute or method that starts with "model_", we must tell set the protected namespaces to an empty tuple.

```py
class IPAdapterModelField(BaseModel):
    model_name: str = Field(description="Name of the IP-Adapter model")
    base_model: BaseModelType = Field(description="Base model")

    model_config = ConfigDict(protected_namespaces=())
```

**Model Serialization**

Pydantic models no longer have `Model.dict()` or `Model.json()`.

Instead, we use `Model.model_dump()` or `Model.model_dump_json()`.

**Model Deserialization**

Pydantic models no longer have `Model.parse_obj()` or `Model.parse_raw()`, and there are no `parse_raw_as()` or `parse_obj_as()` functions.

Instead, you need to create a `TypeAdapter` object to parse python objects or JSON into a model.

```py
adapter_graph = TypeAdapter(Graph)
deserialized_graph_from_json = adapter_graph.validate_json(graph_json)
deserialized_graph_from_dict = adapter_graph.validate_python(graph_dict)
```

**Field Customisation**

Pydantic `Field`s no longer accept arbitrary args.

Now, you must put all additional arbitrary args in a `json_schema_extra` arg on the field.

**Schema Customisation**

FastAPI and pydantic schema generation now follows the OpenAPI version 3.1 spec.

This necessitates two changes:
- Our schema customization logic has been revised
- Schema parsing to build node templates has been revised

The specific aren't important, but this does present additional surface area for bugs.

**Performance Improvements**

Pydantic v2 is a full rewrite with a rust backend. This offers a substantial performance improvement (pydantic claims 5x to 50x depending on the task). We'll notice this the most during serialization and deserialization of sessions/graphs, which happens very very often - a couple times per node.

I haven't done any benchmarks, but anecdotally, graph execution is much faster. Also, very larges graphs - like with massive iterators - are much, much faster.
2023-10-17 14:59:25 +11:00

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# Copyright (c) 2023 Kyle Schouviller (https://github.com/kyle0654)
from contextlib import ExitStack
from functools import singledispatchmethod
from typing import List, Literal, Optional, Union
import einops
import numpy as np
import torch
import torchvision.transforms as T
from diffusers import AutoencoderKL, AutoencoderTiny
from diffusers.image_processor import VaeImageProcessor
from diffusers.models.adapter import FullAdapterXL, T2IAdapter
from diffusers.models.attention_processor import (
AttnProcessor2_0,
LoRAAttnProcessor2_0,
LoRAXFormersAttnProcessor,
XFormersAttnProcessor,
)
from diffusers.schedulers import DPMSolverSDEScheduler
from diffusers.schedulers import SchedulerMixin as Scheduler
from pydantic import field_validator
from torchvision.transforms.functional import resize as tv_resize
from invokeai.app.invocations.ip_adapter import IPAdapterField
from invokeai.app.invocations.metadata import CoreMetadata
from invokeai.app.invocations.primitives import (
DenoiseMaskField,
DenoiseMaskOutput,
ImageField,
ImageOutput,
LatentsField,
LatentsOutput,
build_latents_output,
)
from invokeai.app.invocations.t2i_adapter import T2IAdapterField
from invokeai.app.services.image_records.image_records_common import ImageCategory, ResourceOrigin
from invokeai.app.util.controlnet_utils import prepare_control_image
from invokeai.app.util.step_callback import stable_diffusion_step_callback
from invokeai.backend.ip_adapter.ip_adapter import IPAdapter, IPAdapterPlus
from invokeai.backend.model_management.models import ModelType, SilenceWarnings
from invokeai.backend.stable_diffusion.diffusion.conditioning_data import ConditioningData, IPAdapterConditioningInfo
from ...backend.model_management.lora import ModelPatcher
from ...backend.model_management.models import BaseModelType
from ...backend.model_management.seamless import set_seamless
from ...backend.stable_diffusion import PipelineIntermediateState
from ...backend.stable_diffusion.diffusers_pipeline import (
ControlNetData,
IPAdapterData,
StableDiffusionGeneratorPipeline,
T2IAdapterData,
image_resized_to_grid_as_tensor,
)
from ...backend.stable_diffusion.diffusion.shared_invokeai_diffusion import PostprocessingSettings
from ...backend.stable_diffusion.schedulers import SCHEDULER_MAP
from ...backend.util.devices import choose_precision, choose_torch_device
from .baseinvocation import (
BaseInvocation,
BaseInvocationOutput,
FieldDescriptions,
Input,
InputField,
InvocationContext,
OutputField,
UIType,
invocation,
invocation_output,
)
from .compel import ConditioningField
from .controlnet_image_processors import ControlField
from .model import ModelInfo, UNetField, VaeField
if choose_torch_device() == torch.device("mps"):
from torch import mps
DEFAULT_PRECISION = choose_precision(choose_torch_device())
SAMPLER_NAME_VALUES = Literal[tuple(list(SCHEDULER_MAP.keys()))]
@invocation_output("scheduler_output")
class SchedulerOutput(BaseInvocationOutput):
scheduler: SAMPLER_NAME_VALUES = OutputField(description=FieldDescriptions.scheduler, ui_type=UIType.Scheduler)
@invocation(
"scheduler",
title="Scheduler",
tags=["scheduler"],
category="latents",
version="1.0.0",
)
class SchedulerInvocation(BaseInvocation):
"""Selects a scheduler."""
scheduler: SAMPLER_NAME_VALUES = InputField(
default="euler",
description=FieldDescriptions.scheduler,
ui_type=UIType.Scheduler,
)
def invoke(self, context: InvocationContext) -> SchedulerOutput:
return SchedulerOutput(scheduler=self.scheduler)
@invocation(
"create_denoise_mask",
title="Create Denoise Mask",
tags=["mask", "denoise"],
category="latents",
version="1.0.0",
)
class CreateDenoiseMaskInvocation(BaseInvocation):
"""Creates mask for denoising model run."""
vae: VaeField = InputField(description=FieldDescriptions.vae, input=Input.Connection, ui_order=0)
image: Optional[ImageField] = InputField(default=None, description="Image which will be masked", ui_order=1)
mask: ImageField = InputField(description="The mask to use when pasting", ui_order=2)
tiled: bool = InputField(default=False, description=FieldDescriptions.tiled, ui_order=3)
fp32: bool = InputField(
default=DEFAULT_PRECISION == "float32",
description=FieldDescriptions.fp32,
ui_order=4,
)
def prep_mask_tensor(self, mask_image):
if mask_image.mode != "L":
mask_image = mask_image.convert("L")
mask_tensor = image_resized_to_grid_as_tensor(mask_image, normalize=False)
if mask_tensor.dim() == 3:
mask_tensor = mask_tensor.unsqueeze(0)
# if shape is not None:
# mask_tensor = tv_resize(mask_tensor, shape, T.InterpolationMode.BILINEAR)
return mask_tensor
@torch.no_grad()
def invoke(self, context: InvocationContext) -> DenoiseMaskOutput:
if self.image is not None:
image = context.services.images.get_pil_image(self.image.image_name)
image = image_resized_to_grid_as_tensor(image.convert("RGB"))
if image.dim() == 3:
image = image.unsqueeze(0)
else:
image = None
mask = self.prep_mask_tensor(
context.services.images.get_pil_image(self.mask.image_name),
)
if image is not None:
vae_info = context.services.model_manager.get_model(
**self.vae.vae.model_dump(),
context=context,
)
img_mask = tv_resize(mask, image.shape[-2:], T.InterpolationMode.BILINEAR, antialias=False)
masked_image = image * torch.where(img_mask < 0.5, 0.0, 1.0)
# TODO:
masked_latents = ImageToLatentsInvocation.vae_encode(vae_info, self.fp32, self.tiled, masked_image.clone())
masked_latents_name = f"{context.graph_execution_state_id}__{self.id}_masked_latents"
context.services.latents.save(masked_latents_name, masked_latents)
else:
masked_latents_name = None
mask_name = f"{context.graph_execution_state_id}__{self.id}_mask"
context.services.latents.save(mask_name, mask)
return DenoiseMaskOutput(
denoise_mask=DenoiseMaskField(
mask_name=mask_name,
masked_latents_name=masked_latents_name,
),
)
def get_scheduler(
context: InvocationContext,
scheduler_info: ModelInfo,
scheduler_name: str,
seed: int,
) -> Scheduler:
scheduler_class, scheduler_extra_config = SCHEDULER_MAP.get(scheduler_name, SCHEDULER_MAP["ddim"])
orig_scheduler_info = context.services.model_manager.get_model(
**scheduler_info.model_dump(),
context=context,
)
with orig_scheduler_info as orig_scheduler:
scheduler_config = orig_scheduler.config
if "_backup" in scheduler_config:
scheduler_config = scheduler_config["_backup"]
scheduler_config = {
**scheduler_config,
**scheduler_extra_config,
"_backup": scheduler_config,
}
# make dpmpp_sde reproducable(seed can be passed only in initializer)
if scheduler_class is DPMSolverSDEScheduler:
scheduler_config["noise_sampler_seed"] = seed
scheduler = scheduler_class.from_config(scheduler_config)
# hack copied over from generate.py
if not hasattr(scheduler, "uses_inpainting_model"):
scheduler.uses_inpainting_model = lambda: False
return scheduler
@invocation(
"denoise_latents",
title="Denoise Latents",
tags=["latents", "denoise", "txt2img", "t2i", "t2l", "img2img", "i2i", "l2l"],
category="latents",
version="1.3.0",
)
class DenoiseLatentsInvocation(BaseInvocation):
"""Denoises noisy latents to decodable images"""
positive_conditioning: ConditioningField = InputField(
description=FieldDescriptions.positive_cond, input=Input.Connection, ui_order=0
)
negative_conditioning: ConditioningField = InputField(
description=FieldDescriptions.negative_cond, input=Input.Connection, ui_order=1
)
noise: Optional[LatentsField] = InputField(
default=None,
description=FieldDescriptions.noise,
input=Input.Connection,
ui_order=3,
)
steps: int = InputField(default=10, gt=0, description=FieldDescriptions.steps)
cfg_scale: Union[float, List[float]] = InputField(
default=7.5, ge=1, description=FieldDescriptions.cfg_scale, title="CFG Scale"
)
denoising_start: float = InputField(
default=0.0,
ge=0,
le=1,
description=FieldDescriptions.denoising_start,
)
denoising_end: float = InputField(default=1.0, ge=0, le=1, description=FieldDescriptions.denoising_end)
scheduler: SAMPLER_NAME_VALUES = InputField(
default="euler",
description=FieldDescriptions.scheduler,
ui_type=UIType.Scheduler,
)
unet: UNetField = InputField(
description=FieldDescriptions.unet,
input=Input.Connection,
title="UNet",
ui_order=2,
)
control: Optional[Union[ControlField, list[ControlField]]] = InputField(
default=None,
input=Input.Connection,
ui_order=5,
)
ip_adapter: Optional[Union[IPAdapterField, list[IPAdapterField]]] = InputField(
description=FieldDescriptions.ip_adapter,
title="IP-Adapter",
default=None,
input=Input.Connection,
ui_order=6,
)
t2i_adapter: Optional[Union[T2IAdapterField, list[T2IAdapterField]]] = InputField(
description=FieldDescriptions.t2i_adapter,
title="T2I-Adapter",
default=None,
input=Input.Connection,
ui_order=7,
)
latents: Optional[LatentsField] = InputField(
default=None, description=FieldDescriptions.latents, input=Input.Connection
)
denoise_mask: Optional[DenoiseMaskField] = InputField(
default=None,
description=FieldDescriptions.mask,
input=Input.Connection,
ui_order=8,
)
@field_validator("cfg_scale")
def ge_one(cls, v):
"""validate that all cfg_scale values are >= 1"""
if isinstance(v, list):
for i in v:
if i < 1:
raise ValueError("cfg_scale must be greater than 1")
else:
if v < 1:
raise ValueError("cfg_scale must be greater than 1")
return v
# TODO: pass this an emitter method or something? or a session for dispatching?
def dispatch_progress(
self,
context: InvocationContext,
source_node_id: str,
intermediate_state: PipelineIntermediateState,
base_model: BaseModelType,
) -> None:
stable_diffusion_step_callback(
context=context,
intermediate_state=intermediate_state,
node=self.model_dump(),
source_node_id=source_node_id,
base_model=base_model,
)
def get_conditioning_data(
self,
context: InvocationContext,
scheduler,
unet,
seed,
) -> ConditioningData:
positive_cond_data = context.services.latents.get(self.positive_conditioning.conditioning_name)
c = positive_cond_data.conditionings[0].to(device=unet.device, dtype=unet.dtype)
extra_conditioning_info = c.extra_conditioning
negative_cond_data = context.services.latents.get(self.negative_conditioning.conditioning_name)
uc = negative_cond_data.conditionings[0].to(device=unet.device, dtype=unet.dtype)
conditioning_data = ConditioningData(
unconditioned_embeddings=uc,
text_embeddings=c,
guidance_scale=self.cfg_scale,
extra=extra_conditioning_info,
postprocessing_settings=PostprocessingSettings(
threshold=0.0, # threshold,
warmup=0.2, # warmup,
h_symmetry_time_pct=None, # h_symmetry_time_pct,
v_symmetry_time_pct=None, # v_symmetry_time_pct,
),
)
conditioning_data = conditioning_data.add_scheduler_args_if_applicable(
scheduler,
# for ddim scheduler
eta=0.0, # ddim_eta
# for ancestral and sde schedulers
# flip all bits to have noise different from initial
generator=torch.Generator(device=unet.device).manual_seed(seed ^ 0xFFFFFFFF),
)
return conditioning_data
def create_pipeline(
self,
unet,
scheduler,
) -> StableDiffusionGeneratorPipeline:
# TODO:
# configure_model_padding(
# unet,
# self.seamless,
# self.seamless_axes,
# )
class FakeVae:
class FakeVaeConfig:
def __init__(self):
self.block_out_channels = [0]
def __init__(self):
self.config = FakeVae.FakeVaeConfig()
return StableDiffusionGeneratorPipeline(
vae=FakeVae(), # TODO: oh...
text_encoder=None,
tokenizer=None,
unet=unet,
scheduler=scheduler,
safety_checker=None,
feature_extractor=None,
requires_safety_checker=False,
)
def prep_control_data(
self,
context: InvocationContext,
control_input: Union[ControlField, List[ControlField]],
latents_shape: List[int],
exit_stack: ExitStack,
do_classifier_free_guidance: bool = True,
) -> List[ControlNetData]:
# assuming fixed dimensional scaling of 8:1 for image:latents
control_height_resize = latents_shape[2] * 8
control_width_resize = latents_shape[3] * 8
if control_input is None:
control_list = None
elif isinstance(control_input, list) and len(control_input) == 0:
control_list = None
elif isinstance(control_input, ControlField):
control_list = [control_input]
elif isinstance(control_input, list) and len(control_input) > 0 and isinstance(control_input[0], ControlField):
control_list = control_input
else:
control_list = None
if control_list is None:
return None
# After above handling, any control that is not None should now be of type list[ControlField].
# FIXME: add checks to skip entry if model or image is None
# and if weight is None, populate with default 1.0?
controlnet_data = []
for control_info in control_list:
control_model = exit_stack.enter_context(
context.services.model_manager.get_model(
model_name=control_info.control_model.model_name,
model_type=ModelType.ControlNet,
base_model=control_info.control_model.base_model,
context=context,
)
)
# control_models.append(control_model)
control_image_field = control_info.image
input_image = context.services.images.get_pil_image(control_image_field.image_name)
# self.image.image_type, self.image.image_name
# FIXME: still need to test with different widths, heights, devices, dtypes
# and add in batch_size, num_images_per_prompt?
# and do real check for classifier_free_guidance?
# prepare_control_image should return torch.Tensor of shape(batch_size, 3, height, width)
control_image = prepare_control_image(
image=input_image,
do_classifier_free_guidance=do_classifier_free_guidance,
width=control_width_resize,
height=control_height_resize,
# batch_size=batch_size * num_images_per_prompt,
# num_images_per_prompt=num_images_per_prompt,
device=control_model.device,
dtype=control_model.dtype,
control_mode=control_info.control_mode,
resize_mode=control_info.resize_mode,
)
control_item = ControlNetData(
model=control_model, # model object
image_tensor=control_image,
weight=control_info.control_weight,
begin_step_percent=control_info.begin_step_percent,
end_step_percent=control_info.end_step_percent,
control_mode=control_info.control_mode,
# any resizing needed should currently be happening in prepare_control_image(),
# but adding resize_mode to ControlNetData in case needed in the future
resize_mode=control_info.resize_mode,
)
controlnet_data.append(control_item)
# MultiControlNetModel has been refactored out, just need list[ControlNetData]
return controlnet_data
def prep_ip_adapter_data(
self,
context: InvocationContext,
ip_adapter: Optional[Union[IPAdapterField, list[IPAdapterField]]],
conditioning_data: ConditioningData,
exit_stack: ExitStack,
) -> Optional[list[IPAdapterData]]:
"""If IP-Adapter is enabled, then this function loads the requisite models, and adds the image prompt embeddings
to the `conditioning_data` (in-place).
"""
if ip_adapter is None:
return None
# ip_adapter could be a list or a single IPAdapterField. Normalize to a list here.
if not isinstance(ip_adapter, list):
ip_adapter = [ip_adapter]
if len(ip_adapter) == 0:
return None
ip_adapter_data_list = []
conditioning_data.ip_adapter_conditioning = []
for single_ip_adapter in ip_adapter:
ip_adapter_model: Union[IPAdapter, IPAdapterPlus] = exit_stack.enter_context(
context.services.model_manager.get_model(
model_name=single_ip_adapter.ip_adapter_model.model_name,
model_type=ModelType.IPAdapter,
base_model=single_ip_adapter.ip_adapter_model.base_model,
context=context,
)
)
image_encoder_model_info = context.services.model_manager.get_model(
model_name=single_ip_adapter.image_encoder_model.model_name,
model_type=ModelType.CLIPVision,
base_model=single_ip_adapter.image_encoder_model.base_model,
context=context,
)
input_image = context.services.images.get_pil_image(single_ip_adapter.image.image_name)
# TODO(ryand): With some effort, the step of running the CLIP Vision encoder could be done before any other
# models are needed in memory. This would help to reduce peak memory utilization in low-memory environments.
with image_encoder_model_info as image_encoder_model:
# Get image embeddings from CLIP and ImageProjModel.
(
image_prompt_embeds,
uncond_image_prompt_embeds,
) = ip_adapter_model.get_image_embeds(input_image, image_encoder_model)
conditioning_data.ip_adapter_conditioning.append(
IPAdapterConditioningInfo(image_prompt_embeds, uncond_image_prompt_embeds)
)
ip_adapter_data_list.append(
IPAdapterData(
ip_adapter_model=ip_adapter_model,
weight=single_ip_adapter.weight,
begin_step_percent=single_ip_adapter.begin_step_percent,
end_step_percent=single_ip_adapter.end_step_percent,
)
)
return ip_adapter_data_list
def run_t2i_adapters(
self,
context: InvocationContext,
t2i_adapter: Optional[Union[T2IAdapterField, list[T2IAdapterField]]],
latents_shape: list[int],
do_classifier_free_guidance: bool,
) -> Optional[list[T2IAdapterData]]:
if t2i_adapter is None:
return None
# Handle the possibility that t2i_adapter could be a list or a single T2IAdapterField.
if isinstance(t2i_adapter, T2IAdapterField):
t2i_adapter = [t2i_adapter]
if len(t2i_adapter) == 0:
return None
t2i_adapter_data = []
for t2i_adapter_field in t2i_adapter:
t2i_adapter_model_info = context.services.model_manager.get_model(
model_name=t2i_adapter_field.t2i_adapter_model.model_name,
model_type=ModelType.T2IAdapter,
base_model=t2i_adapter_field.t2i_adapter_model.base_model,
context=context,
)
image = context.services.images.get_pil_image(t2i_adapter_field.image.image_name)
# The max_unet_downscale is the maximum amount that the UNet model downscales the latent image internally.
if t2i_adapter_field.t2i_adapter_model.base_model == BaseModelType.StableDiffusion1:
max_unet_downscale = 8
elif t2i_adapter_field.t2i_adapter_model.base_model == BaseModelType.StableDiffusionXL:
max_unet_downscale = 4
else:
raise ValueError(
f"Unexpected T2I-Adapter base model type: '{t2i_adapter_field.t2i_adapter_model.base_model}'."
)
t2i_adapter_model: T2IAdapter
with t2i_adapter_model_info as t2i_adapter_model:
total_downscale_factor = t2i_adapter_model.total_downscale_factor
if isinstance(t2i_adapter_model.adapter, FullAdapterXL):
# HACK(ryand): Work around a bug in FullAdapterXL. This is being addressed upstream in diffusers by
# this PR: https://github.com/huggingface/diffusers/pull/5134.
total_downscale_factor = total_downscale_factor // 2
# Resize the T2I-Adapter input image.
# We select the resize dimensions so that after the T2I-Adapter's total_downscale_factor is applied, the
# result will match the latent image's dimensions after max_unet_downscale is applied.
t2i_input_height = latents_shape[2] // max_unet_downscale * total_downscale_factor
t2i_input_width = latents_shape[3] // max_unet_downscale * total_downscale_factor
# Note: We have hard-coded `do_classifier_free_guidance=False`. This is because we only want to prepare
# a single image. If CFG is enabled, we will duplicate the resultant tensor after applying the
# T2I-Adapter model.
#
# Note: We re-use the `prepare_control_image(...)` from ControlNet for T2I-Adapter, because it has many
# of the same requirements (e.g. preserving binary masks during resize).
t2i_image = prepare_control_image(
image=image,
do_classifier_free_guidance=False,
width=t2i_input_width,
height=t2i_input_height,
num_channels=t2i_adapter_model.config.in_channels,
device=t2i_adapter_model.device,
dtype=t2i_adapter_model.dtype,
resize_mode=t2i_adapter_field.resize_mode,
)
adapter_state = t2i_adapter_model(t2i_image)
if do_classifier_free_guidance:
for idx, value in enumerate(adapter_state):
adapter_state[idx] = torch.cat([value] * 2, dim=0)
t2i_adapter_data.append(
T2IAdapterData(
adapter_state=adapter_state,
weight=t2i_adapter_field.weight,
begin_step_percent=t2i_adapter_field.begin_step_percent,
end_step_percent=t2i_adapter_field.end_step_percent,
)
)
return t2i_adapter_data
# original idea by https://github.com/AmericanPresidentJimmyCarter
# TODO: research more for second order schedulers timesteps
def init_scheduler(self, scheduler, device, steps, denoising_start, denoising_end):
if scheduler.config.get("cpu_only", False):
scheduler.set_timesteps(steps, device="cpu")
timesteps = scheduler.timesteps.to(device=device)
else:
scheduler.set_timesteps(steps, device=device)
timesteps = scheduler.timesteps
# skip greater order timesteps
_timesteps = timesteps[:: scheduler.order]
# get start timestep index
t_start_val = int(round(scheduler.config.num_train_timesteps * (1 - denoising_start)))
t_start_idx = len(list(filter(lambda ts: ts >= t_start_val, _timesteps)))
# get end timestep index
t_end_val = int(round(scheduler.config.num_train_timesteps * (1 - denoising_end)))
t_end_idx = len(list(filter(lambda ts: ts >= t_end_val, _timesteps[t_start_idx:])))
# apply order to indexes
t_start_idx *= scheduler.order
t_end_idx *= scheduler.order
init_timestep = timesteps[t_start_idx : t_start_idx + 1]
timesteps = timesteps[t_start_idx : t_start_idx + t_end_idx]
num_inference_steps = len(timesteps) // scheduler.order
return num_inference_steps, timesteps, init_timestep
def prep_inpaint_mask(self, context, latents):
if self.denoise_mask is None:
return None, None
mask = context.services.latents.get(self.denoise_mask.mask_name)
mask = tv_resize(mask, latents.shape[-2:], T.InterpolationMode.BILINEAR, antialias=False)
if self.denoise_mask.masked_latents_name is not None:
masked_latents = context.services.latents.get(self.denoise_mask.masked_latents_name)
else:
masked_latents = None
return 1 - mask, masked_latents
@torch.no_grad()
def invoke(self, context: InvocationContext) -> LatentsOutput:
with SilenceWarnings(): # this quenches NSFW nag from diffusers
seed = None
noise = None
if self.noise is not None:
noise = context.services.latents.get(self.noise.latents_name)
seed = self.noise.seed
if self.latents is not None:
latents = context.services.latents.get(self.latents.latents_name)
if seed is None:
seed = self.latents.seed
if noise is not None and noise.shape[1:] != latents.shape[1:]:
raise Exception(f"Incompatable 'noise' and 'latents' shapes: {latents.shape=} {noise.shape=}")
elif noise is not None:
latents = torch.zeros_like(noise)
else:
raise Exception("'latents' or 'noise' must be provided!")
if seed is None:
seed = 0
mask, masked_latents = self.prep_inpaint_mask(context, latents)
# TODO(ryand): I have hard-coded `do_classifier_free_guidance=True` to mirror the behaviour of ControlNets,
# below. Investigate whether this is appropriate.
t2i_adapter_data = self.run_t2i_adapters(
context,
self.t2i_adapter,
latents.shape,
do_classifier_free_guidance=True,
)
# Get the source node id (we are invoking the prepared node)
graph_execution_state = context.services.graph_execution_manager.get(context.graph_execution_state_id)
source_node_id = graph_execution_state.prepared_source_mapping[self.id]
def step_callback(state: PipelineIntermediateState):
self.dispatch_progress(context, source_node_id, state, self.unet.unet.base_model)
def _lora_loader():
for lora in self.unet.loras:
lora_info = context.services.model_manager.get_model(
**lora.model_dump(exclude={"weight"}),
context=context,
)
yield (lora_info.context.model, lora.weight)
del lora_info
return
unet_info = context.services.model_manager.get_model(
**self.unet.unet.model_dump(),
context=context,
)
with (
ExitStack() as exit_stack,
ModelPatcher.apply_lora_unet(unet_info.context.model, _lora_loader()),
set_seamless(unet_info.context.model, self.unet.seamless_axes),
unet_info as unet,
):
latents = latents.to(device=unet.device, dtype=unet.dtype)
if noise is not None:
noise = noise.to(device=unet.device, dtype=unet.dtype)
if mask is not None:
mask = mask.to(device=unet.device, dtype=unet.dtype)
if masked_latents is not None:
masked_latents = masked_latents.to(device=unet.device, dtype=unet.dtype)
scheduler = get_scheduler(
context=context,
scheduler_info=self.unet.scheduler,
scheduler_name=self.scheduler,
seed=seed,
)
pipeline = self.create_pipeline(unet, scheduler)
conditioning_data = self.get_conditioning_data(context, scheduler, unet, seed)
controlnet_data = self.prep_control_data(
context=context,
control_input=self.control,
latents_shape=latents.shape,
# do_classifier_free_guidance=(self.cfg_scale >= 1.0))
do_classifier_free_guidance=True,
exit_stack=exit_stack,
)
ip_adapter_data = self.prep_ip_adapter_data(
context=context,
ip_adapter=self.ip_adapter,
conditioning_data=conditioning_data,
exit_stack=exit_stack,
)
num_inference_steps, timesteps, init_timestep = self.init_scheduler(
scheduler,
device=unet.device,
steps=self.steps,
denoising_start=self.denoising_start,
denoising_end=self.denoising_end,
)
(
result_latents,
result_attention_map_saver,
) = pipeline.latents_from_embeddings(
latents=latents,
timesteps=timesteps,
init_timestep=init_timestep,
noise=noise,
seed=seed,
mask=mask,
masked_latents=masked_latents,
num_inference_steps=num_inference_steps,
conditioning_data=conditioning_data,
control_data=controlnet_data,
ip_adapter_data=ip_adapter_data,
t2i_adapter_data=t2i_adapter_data,
callback=step_callback,
)
# https://discuss.huggingface.co/t/memory-usage-by-later-pipeline-stages/23699
result_latents = result_latents.to("cpu")
torch.cuda.empty_cache()
if choose_torch_device() == torch.device("mps"):
mps.empty_cache()
name = f"{context.graph_execution_state_id}__{self.id}"
context.services.latents.save(name, result_latents)
return build_latents_output(latents_name=name, latents=result_latents, seed=seed)
@invocation(
"l2i",
title="Latents to Image",
tags=["latents", "image", "vae", "l2i"],
category="latents",
version="1.0.0",
)
class LatentsToImageInvocation(BaseInvocation):
"""Generates an image from latents."""
latents: LatentsField = InputField(
description=FieldDescriptions.latents,
input=Input.Connection,
)
vae: VaeField = InputField(
description=FieldDescriptions.vae,
input=Input.Connection,
)
tiled: bool = InputField(default=False, description=FieldDescriptions.tiled)
fp32: bool = InputField(default=DEFAULT_PRECISION == "float32", description=FieldDescriptions.fp32)
metadata: Optional[CoreMetadata] = InputField(
default=None,
description=FieldDescriptions.core_metadata,
ui_hidden=True,
)
@torch.no_grad()
def invoke(self, context: InvocationContext) -> ImageOutput:
latents = context.services.latents.get(self.latents.latents_name)
vae_info = context.services.model_manager.get_model(
**self.vae.vae.model_dump(),
context=context,
)
with set_seamless(vae_info.context.model, self.vae.seamless_axes), vae_info as vae:
latents = latents.to(vae.device)
if self.fp32:
vae.to(dtype=torch.float32)
use_torch_2_0_or_xformers = isinstance(
vae.decoder.mid_block.attentions[0].processor,
(
AttnProcessor2_0,
XFormersAttnProcessor,
LoRAXFormersAttnProcessor,
LoRAAttnProcessor2_0,
),
)
# if xformers or torch_2_0 is used attention block does not need
# to be in float32 which can save lots of memory
if use_torch_2_0_or_xformers:
vae.post_quant_conv.to(latents.dtype)
vae.decoder.conv_in.to(latents.dtype)
vae.decoder.mid_block.to(latents.dtype)
else:
latents = latents.float()
else:
vae.to(dtype=torch.float16)
latents = latents.half()
if self.tiled or context.services.configuration.tiled_decode:
vae.enable_tiling()
else:
vae.disable_tiling()
# clear memory as vae decode can request a lot
torch.cuda.empty_cache()
if choose_torch_device() == torch.device("mps"):
mps.empty_cache()
with torch.inference_mode():
# copied from diffusers pipeline
latents = latents / vae.config.scaling_factor
image = vae.decode(latents, return_dict=False)[0]
image = (image / 2 + 0.5).clamp(0, 1) # denormalize
# we always cast to float32 as this does not cause significant overhead and is compatible with bfloat16
np_image = image.cpu().permute(0, 2, 3, 1).float().numpy()
image = VaeImageProcessor.numpy_to_pil(np_image)[0]
torch.cuda.empty_cache()
if choose_torch_device() == torch.device("mps"):
mps.empty_cache()
image_dto = context.services.images.create(
image=image,
image_origin=ResourceOrigin.INTERNAL,
image_category=ImageCategory.GENERAL,
node_id=self.id,
session_id=context.graph_execution_state_id,
is_intermediate=self.is_intermediate,
metadata=self.metadata.model_dump() if self.metadata else None,
workflow=self.workflow,
)
return ImageOutput(
image=ImageField(image_name=image_dto.image_name),
width=image_dto.width,
height=image_dto.height,
)
LATENTS_INTERPOLATION_MODE = Literal["nearest", "linear", "bilinear", "bicubic", "trilinear", "area", "nearest-exact"]
@invocation(
"lresize",
title="Resize Latents",
tags=["latents", "resize"],
category="latents",
version="1.0.0",
)
class ResizeLatentsInvocation(BaseInvocation):
"""Resizes latents to explicit width/height (in pixels). Provided dimensions are floor-divided by 8."""
latents: LatentsField = InputField(
description=FieldDescriptions.latents,
input=Input.Connection,
)
width: int = InputField(
ge=64,
multiple_of=8,
description=FieldDescriptions.width,
)
height: int = InputField(
ge=64,
multiple_of=8,
description=FieldDescriptions.width,
)
mode: LATENTS_INTERPOLATION_MODE = InputField(default="bilinear", description=FieldDescriptions.interp_mode)
antialias: bool = InputField(default=False, description=FieldDescriptions.torch_antialias)
def invoke(self, context: InvocationContext) -> LatentsOutput:
latents = context.services.latents.get(self.latents.latents_name)
# TODO:
device = choose_torch_device()
resized_latents = torch.nn.functional.interpolate(
latents.to(device),
size=(self.height // 8, self.width // 8),
mode=self.mode,
antialias=self.antialias if self.mode in ["bilinear", "bicubic"] else False,
)
# https://discuss.huggingface.co/t/memory-usage-by-later-pipeline-stages/23699
resized_latents = resized_latents.to("cpu")
torch.cuda.empty_cache()
if device == torch.device("mps"):
mps.empty_cache()
name = f"{context.graph_execution_state_id}__{self.id}"
# context.services.latents.set(name, resized_latents)
context.services.latents.save(name, resized_latents)
return build_latents_output(latents_name=name, latents=resized_latents, seed=self.latents.seed)
@invocation(
"lscale",
title="Scale Latents",
tags=["latents", "resize"],
category="latents",
version="1.0.0",
)
class ScaleLatentsInvocation(BaseInvocation):
"""Scales latents by a given factor."""
latents: LatentsField = InputField(
description=FieldDescriptions.latents,
input=Input.Connection,
)
scale_factor: float = InputField(gt=0, description=FieldDescriptions.scale_factor)
mode: LATENTS_INTERPOLATION_MODE = InputField(default="bilinear", description=FieldDescriptions.interp_mode)
antialias: bool = InputField(default=False, description=FieldDescriptions.torch_antialias)
def invoke(self, context: InvocationContext) -> LatentsOutput:
latents = context.services.latents.get(self.latents.latents_name)
# TODO:
device = choose_torch_device()
# resizing
resized_latents = torch.nn.functional.interpolate(
latents.to(device),
scale_factor=self.scale_factor,
mode=self.mode,
antialias=self.antialias if self.mode in ["bilinear", "bicubic"] else False,
)
# https://discuss.huggingface.co/t/memory-usage-by-later-pipeline-stages/23699
resized_latents = resized_latents.to("cpu")
torch.cuda.empty_cache()
if device == torch.device("mps"):
mps.empty_cache()
name = f"{context.graph_execution_state_id}__{self.id}"
# context.services.latents.set(name, resized_latents)
context.services.latents.save(name, resized_latents)
return build_latents_output(latents_name=name, latents=resized_latents, seed=self.latents.seed)
@invocation(
"i2l",
title="Image to Latents",
tags=["latents", "image", "vae", "i2l"],
category="latents",
version="1.0.0",
)
class ImageToLatentsInvocation(BaseInvocation):
"""Encodes an image into latents."""
image: ImageField = InputField(
description="The image to encode",
)
vae: VaeField = InputField(
description=FieldDescriptions.vae,
input=Input.Connection,
)
tiled: bool = InputField(default=False, description=FieldDescriptions.tiled)
fp32: bool = InputField(default=DEFAULT_PRECISION == "float32", description=FieldDescriptions.fp32)
@staticmethod
def vae_encode(vae_info, upcast, tiled, image_tensor):
with vae_info as vae:
orig_dtype = vae.dtype
if upcast:
vae.to(dtype=torch.float32)
use_torch_2_0_or_xformers = isinstance(
vae.decoder.mid_block.attentions[0].processor,
(
AttnProcessor2_0,
XFormersAttnProcessor,
LoRAXFormersAttnProcessor,
LoRAAttnProcessor2_0,
),
)
# if xformers or torch_2_0 is used attention block does not need
# to be in float32 which can save lots of memory
if use_torch_2_0_or_xformers:
vae.post_quant_conv.to(orig_dtype)
vae.decoder.conv_in.to(orig_dtype)
vae.decoder.mid_block.to(orig_dtype)
# else:
# latents = latents.float()
else:
vae.to(dtype=torch.float16)
# latents = latents.half()
if tiled:
vae.enable_tiling()
else:
vae.disable_tiling()
# non_noised_latents_from_image
image_tensor = image_tensor.to(device=vae.device, dtype=vae.dtype)
with torch.inference_mode():
latents = ImageToLatentsInvocation._encode_to_tensor(vae, image_tensor)
latents = vae.config.scaling_factor * latents
latents = latents.to(dtype=orig_dtype)
return latents
@torch.no_grad()
def invoke(self, context: InvocationContext) -> LatentsOutput:
image = context.services.images.get_pil_image(self.image.image_name)
vae_info = context.services.model_manager.get_model(
**self.vae.vae.model_dump(),
context=context,
)
image_tensor = image_resized_to_grid_as_tensor(image.convert("RGB"))
if image_tensor.dim() == 3:
image_tensor = einops.rearrange(image_tensor, "c h w -> 1 c h w")
latents = self.vae_encode(vae_info, self.fp32, self.tiled, image_tensor)
name = f"{context.graph_execution_state_id}__{self.id}"
latents = latents.to("cpu")
context.services.latents.save(name, latents)
return build_latents_output(latents_name=name, latents=latents, seed=None)
@singledispatchmethod
@staticmethod
def _encode_to_tensor(vae: AutoencoderKL, image_tensor: torch.FloatTensor) -> torch.FloatTensor:
image_tensor_dist = vae.encode(image_tensor).latent_dist
latents = image_tensor_dist.sample().to(dtype=vae.dtype) # FIXME: uses torch.randn. make reproducible!
return latents
@_encode_to_tensor.register
@staticmethod
def _(vae: AutoencoderTiny, image_tensor: torch.FloatTensor) -> torch.FloatTensor:
return vae.encode(image_tensor).latents
@invocation(
"lblend",
title="Blend Latents",
tags=["latents", "blend"],
category="latents",
version="1.0.0",
)
class BlendLatentsInvocation(BaseInvocation):
"""Blend two latents using a given alpha. Latents must have same size."""
latents_a: LatentsField = InputField(
description=FieldDescriptions.latents,
input=Input.Connection,
)
latents_b: LatentsField = InputField(
description=FieldDescriptions.latents,
input=Input.Connection,
)
alpha: float = InputField(default=0.5, description=FieldDescriptions.blend_alpha)
def invoke(self, context: InvocationContext) -> LatentsOutput:
latents_a = context.services.latents.get(self.latents_a.latents_name)
latents_b = context.services.latents.get(self.latents_b.latents_name)
if latents_a.shape != latents_b.shape:
raise "Latents to blend must be the same size."
# TODO:
device = choose_torch_device()
def slerp(t, v0, v1, DOT_THRESHOLD=0.9995):
"""
Spherical linear interpolation
Args:
t (float/np.ndarray): Float value between 0.0 and 1.0
v0 (np.ndarray): Starting vector
v1 (np.ndarray): Final vector
DOT_THRESHOLD (float): Threshold for considering the two vectors as
colineal. Not recommended to alter this.
Returns:
v2 (np.ndarray): Interpolation vector between v0 and v1
"""
inputs_are_torch = False
if not isinstance(v0, np.ndarray):
inputs_are_torch = True
v0 = v0.detach().cpu().numpy()
if not isinstance(v1, np.ndarray):
inputs_are_torch = True
v1 = v1.detach().cpu().numpy()
dot = np.sum(v0 * v1 / (np.linalg.norm(v0) * np.linalg.norm(v1)))
if np.abs(dot) > DOT_THRESHOLD:
v2 = (1 - t) * v0 + t * v1
else:
theta_0 = np.arccos(dot)
sin_theta_0 = np.sin(theta_0)
theta_t = theta_0 * t
sin_theta_t = np.sin(theta_t)
s0 = np.sin(theta_0 - theta_t) / sin_theta_0
s1 = sin_theta_t / sin_theta_0
v2 = s0 * v0 + s1 * v1
if inputs_are_torch:
v2 = torch.from_numpy(v2).to(device)
return v2
# blend
blended_latents = slerp(self.alpha, latents_a, latents_b)
# https://discuss.huggingface.co/t/memory-usage-by-later-pipeline-stages/23699
blended_latents = blended_latents.to("cpu")
torch.cuda.empty_cache()
if device == torch.device("mps"):
mps.empty_cache()
name = f"{context.graph_execution_state_id}__{self.id}"
# context.services.latents.set(name, resized_latents)
context.services.latents.save(name, blended_latents)
return build_latents_output(latents_name=name, latents=blended_latents)
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