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gen_img.py
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gen_img.py
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import itertools
import json
from typing import Any, List, NamedTuple, Optional, Tuple, Union, Callable
import glob
import importlib
import importlib.util
import sys
import inspect
import time
import zipfile
from diffusers.utils import deprecate
from diffusers.configuration_utils import FrozenDict
import argparse
import math
import os
import random
import re
import diffusers
import numpy as np
import torch
from library.device_utils import init_ipex, clean_memory, get_preferred_device
init_ipex()
import torchvision
from diffusers import (
AutoencoderKL,
DDPMScheduler,
EulerAncestralDiscreteScheduler,
DPMSolverMultistepScheduler,
DPMSolverSinglestepScheduler,
LMSDiscreteScheduler,
PNDMScheduler,
DDIMScheduler,
EulerDiscreteScheduler,
HeunDiscreteScheduler,
KDPM2DiscreteScheduler,
KDPM2AncestralDiscreteScheduler,
# UNet2DConditionModel,
StableDiffusionPipeline,
)
from einops import rearrange
from tqdm import tqdm
from torchvision import transforms
from transformers import CLIPTextModel, CLIPTokenizer, CLIPVisionModelWithProjection, CLIPImageProcessor
import PIL
from PIL import Image
from PIL.PngImagePlugin import PngInfo
import library.model_util as model_util
import library.train_util as train_util
import library.sdxl_model_util as sdxl_model_util
import library.sdxl_train_util as sdxl_train_util
from networks.lora import LoRANetwork
import tools.original_control_net as original_control_net
from tools.original_control_net import ControlNetInfo
from library.original_unet import UNet2DConditionModel, InferUNet2DConditionModel
from library.sdxl_original_unet import InferSdxlUNet2DConditionModel
from library.original_unet import FlashAttentionFunction
from networks.control_net_lllite import ControlNetLLLite
from library.utils import GradualLatent, EulerAncestralDiscreteSchedulerGL
from library.utils import setup_logging, add_logging_arguments
setup_logging()
import logging
logger = logging.getLogger(__name__)
# scheduler:
SCHEDULER_LINEAR_START = 0.00085
SCHEDULER_LINEAR_END = 0.0120
SCHEDULER_TIMESTEPS = 1000
SCHEDLER_SCHEDULE = "scaled_linear"
# その他の設定
LATENT_CHANNELS = 4
DOWNSAMPLING_FACTOR = 8
CLIP_VISION_MODEL = "laion/CLIP-ViT-bigG-14-laion2B-39B-b160k"
# region モジュール入れ替え部
"""
高速化のためのモジュール入れ替え
"""
def replace_unet_modules(unet: diffusers.models.unet_2d_condition.UNet2DConditionModel, mem_eff_attn, xformers, sdpa):
if mem_eff_attn:
logger.info("Enable memory efficient attention for U-Net")
# これはDiffusersのU-Netではなく自前のU-Netなので置き換えなくても良い
unet.set_use_memory_efficient_attention(False, True)
elif xformers:
logger.info("Enable xformers for U-Net")
try:
import xformers.ops
except ImportError:
raise ImportError("No xformers / xformersがインストールされていないようです")
unet.set_use_memory_efficient_attention(True, False)
elif sdpa:
logger.info("Enable SDPA for U-Net")
unet.set_use_memory_efficient_attention(False, False)
unet.set_use_sdpa(True)
# TODO common train_util.py
def replace_vae_modules(vae: diffusers.models.AutoencoderKL, mem_eff_attn, xformers, sdpa):
if mem_eff_attn:
replace_vae_attn_to_memory_efficient()
elif xformers:
# replace_vae_attn_to_xformers() # 解像度によってxformersがエラーを出す?
vae.set_use_memory_efficient_attention_xformers(True) # とりあえずこっちを使う
elif sdpa:
replace_vae_attn_to_sdpa()
def replace_vae_attn_to_memory_efficient():
logger.info("VAE Attention.forward has been replaced to FlashAttention (not xformers)")
flash_func = FlashAttentionFunction
def forward_flash_attn(self, hidden_states, **kwargs):
q_bucket_size = 512
k_bucket_size = 1024
residual = hidden_states
batch, channel, height, width = hidden_states.shape
# norm
hidden_states = self.group_norm(hidden_states)
hidden_states = hidden_states.view(batch, channel, height * width).transpose(1, 2)
# proj to q, k, v
query_proj = self.to_q(hidden_states)
key_proj = self.to_k(hidden_states)
value_proj = self.to_v(hidden_states)
query_proj, key_proj, value_proj = map(
lambda t: rearrange(t, "b n (h d) -> b h n d", h=self.heads), (query_proj, key_proj, value_proj)
)
out = flash_func.apply(query_proj, key_proj, value_proj, None, False, q_bucket_size, k_bucket_size)
out = rearrange(out, "b h n d -> b n (h d)")
# compute next hidden_states
# linear proj
hidden_states = self.to_out[0](hidden_states)
# dropout
hidden_states = self.to_out[1](hidden_states)
hidden_states = hidden_states.transpose(-1, -2).reshape(batch, channel, height, width)
# res connect and rescale
hidden_states = (hidden_states + residual) / self.rescale_output_factor
return hidden_states
def forward_flash_attn_0_14(self, hidden_states, **kwargs):
if not hasattr(self, "to_q"):
self.to_q = self.query
self.to_k = self.key
self.to_v = self.value
self.to_out = [self.proj_attn, torch.nn.Identity()]
self.heads = self.num_heads
return forward_flash_attn(self, hidden_states, **kwargs)
if diffusers.__version__ < "0.15.0":
diffusers.models.attention.AttentionBlock.forward = forward_flash_attn_0_14
else:
diffusers.models.attention_processor.Attention.forward = forward_flash_attn
def replace_vae_attn_to_xformers():
logger.info("VAE: Attention.forward has been replaced to xformers")
import xformers.ops
def forward_xformers(self, hidden_states, **kwargs):
residual = hidden_states
batch, channel, height, width = hidden_states.shape
# norm
hidden_states = self.group_norm(hidden_states)
hidden_states = hidden_states.view(batch, channel, height * width).transpose(1, 2)
# proj to q, k, v
query_proj = self.to_q(hidden_states)
key_proj = self.to_k(hidden_states)
value_proj = self.to_v(hidden_states)
query_proj, key_proj, value_proj = map(
lambda t: rearrange(t, "b n (h d) -> b h n d", h=self.heads), (query_proj, key_proj, value_proj)
)
query_proj = query_proj.contiguous()
key_proj = key_proj.contiguous()
value_proj = value_proj.contiguous()
out = xformers.ops.memory_efficient_attention(query_proj, key_proj, value_proj, attn_bias=None)
out = rearrange(out, "b h n d -> b n (h d)")
# compute next hidden_states
# linear proj
hidden_states = self.to_out[0](hidden_states)
# dropout
hidden_states = self.to_out[1](hidden_states)
hidden_states = hidden_states.transpose(-1, -2).reshape(batch, channel, height, width)
# res connect and rescale
hidden_states = (hidden_states + residual) / self.rescale_output_factor
return hidden_states
def forward_xformers_0_14(self, hidden_states, **kwargs):
if not hasattr(self, "to_q"):
self.to_q = self.query
self.to_k = self.key
self.to_v = self.value
self.to_out = [self.proj_attn, torch.nn.Identity()]
self.heads = self.num_heads
return forward_xformers(self, hidden_states, **kwargs)
if diffusers.__version__ < "0.15.0":
diffusers.models.attention.AttentionBlock.forward = forward_xformers_0_14
else:
diffusers.models.attention_processor.Attention.forward = forward_xformers
def replace_vae_attn_to_sdpa():
logger.info("VAE: Attention.forward has been replaced to sdpa")
def forward_sdpa(self, hidden_states, **kwargs):
residual = hidden_states
batch, channel, height, width = hidden_states.shape
# norm
hidden_states = self.group_norm(hidden_states)
hidden_states = hidden_states.view(batch, channel, height * width).transpose(1, 2)
# proj to q, k, v
query_proj = self.to_q(hidden_states)
key_proj = self.to_k(hidden_states)
value_proj = self.to_v(hidden_states)
query_proj, key_proj, value_proj = map(
lambda t: rearrange(t, "b n (h d) -> b n h d", h=self.heads), (query_proj, key_proj, value_proj)
)
out = torch.nn.functional.scaled_dot_product_attention(
query_proj, key_proj, value_proj, attn_mask=None, dropout_p=0.0, is_causal=False
)
out = rearrange(out, "b n h d -> b n (h d)")
# compute next hidden_states
# linear proj
hidden_states = self.to_out[0](hidden_states)
# dropout
hidden_states = self.to_out[1](hidden_states)
hidden_states = hidden_states.transpose(-1, -2).reshape(batch, channel, height, width)
# res connect and rescale
hidden_states = (hidden_states + residual) / self.rescale_output_factor
return hidden_states
def forward_sdpa_0_14(self, hidden_states, **kwargs):
if not hasattr(self, "to_q"):
self.to_q = self.query
self.to_k = self.key
self.to_v = self.value
self.to_out = [self.proj_attn, torch.nn.Identity()]
self.heads = self.num_heads
return forward_sdpa(self, hidden_states, **kwargs)
if diffusers.__version__ < "0.15.0":
diffusers.models.attention.AttentionBlock.forward = forward_sdpa_0_14
else:
diffusers.models.attention_processor.Attention.forward = forward_sdpa
# endregion
# region 画像生成の本体:lpw_stable_diffusion.py (ASL)からコピーして修正
# https://github.com/huggingface/diffusers/blob/main/examples/community/lpw_stable_diffusion.py
# Pipelineだけ独立して使えないのと機能追加するのとでコピーして修正
class PipelineLike:
def __init__(
self,
is_sdxl,
device,
vae: AutoencoderKL,
text_encoders: List[CLIPTextModel],
tokenizers: List[CLIPTokenizer],
unet: InferSdxlUNet2DConditionModel,
scheduler: Union[DDIMScheduler, PNDMScheduler, LMSDiscreteScheduler],
clip_skip: int,
):
super().__init__()
self.is_sdxl = is_sdxl
self.device = device
self.clip_skip = clip_skip
if hasattr(scheduler.config, "steps_offset") and scheduler.config.steps_offset != 1:
deprecation_message = (
f"The configuration file of this scheduler: {scheduler} is outdated. `steps_offset`"
f" should be set to 1 instead of {scheduler.config.steps_offset}. Please make sure "
"to update the config accordingly as leaving `steps_offset` might led to incorrect results"
" in future versions. If you have downloaded this checkpoint from the Hugging Face Hub,"
" it would be very nice if you could open a Pull request for the `scheduler/scheduler_config.json`"
" file"
)
deprecate("steps_offset!=1", "1.0.0", deprecation_message, standard_warn=False)
new_config = dict(scheduler.config)
new_config["steps_offset"] = 1
scheduler._internal_dict = FrozenDict(new_config)
if hasattr(scheduler.config, "clip_sample") and scheduler.config.clip_sample is True:
deprecation_message = (
f"The configuration file of this scheduler: {scheduler} has not set the configuration `clip_sample`."
" `clip_sample` should be set to False in the configuration file. Please make sure to update the"
" config accordingly as not setting `clip_sample` in the config might lead to incorrect results in"
" future versions. If you have downloaded this checkpoint from the Hugging Face Hub, it would be very"
" nice if you could open a Pull request for the `scheduler/scheduler_config.json` file"
)
deprecate("clip_sample not set", "1.0.0", deprecation_message, standard_warn=False)
new_config = dict(scheduler.config)
new_config["clip_sample"] = False
scheduler._internal_dict = FrozenDict(new_config)
self.vae = vae
self.text_encoders = text_encoders
self.tokenizers = tokenizers
self.unet: Union[InferUNet2DConditionModel, InferSdxlUNet2DConditionModel] = unet
self.scheduler = scheduler
self.safety_checker = None
self.clip_vision_model: CLIPVisionModelWithProjection = None
self.clip_vision_processor: CLIPImageProcessor = None
self.clip_vision_strength = 0.0
# Textual Inversion
self.token_replacements_list = []
for _ in range(len(self.text_encoders)):
self.token_replacements_list.append({})
# ControlNet
self.control_nets: List[ControlNetInfo] = [] # only for SD 1.5
self.control_net_lllites: List[ControlNetLLLite] = []
self.control_net_enabled = True # control_netsが空ならTrueでもFalseでもControlNetは動作しない
self.gradual_latent: GradualLatent = None
# Textual Inversion
def add_token_replacement(self, text_encoder_index, target_token_id, rep_token_ids):
self.token_replacements_list[text_encoder_index][target_token_id] = rep_token_ids
def set_enable_control_net(self, en: bool):
self.control_net_enabled = en
def get_token_replacer(self, tokenizer):
tokenizer_index = self.tokenizers.index(tokenizer)
token_replacements = self.token_replacements_list[tokenizer_index]
def replace_tokens(tokens):
# print("replace_tokens", tokens, "=>", token_replacements)
if isinstance(tokens, torch.Tensor):
tokens = tokens.tolist()
new_tokens = []
for token in tokens:
if token in token_replacements:
replacement = token_replacements[token]
new_tokens.extend(replacement)
else:
new_tokens.append(token)
return new_tokens
return replace_tokens
def set_control_nets(self, ctrl_nets):
self.control_nets = ctrl_nets
def set_control_net_lllites(self, ctrl_net_lllites):
self.control_net_lllites = ctrl_net_lllites
def set_gradual_latent(self, gradual_latent):
if gradual_latent is None:
logger.info("gradual_latent is disabled")
self.gradual_latent = None
else:
logger.info(f"gradual_latent is enabled: {gradual_latent}")
self.gradual_latent = gradual_latent # (ds_ratio, start_timesteps, every_n_steps, ratio_step)
@torch.no_grad()
def __call__(
self,
prompt: Union[str, List[str]],
negative_prompt: Optional[Union[str, List[str]]] = None,
init_image: Union[torch.FloatTensor, PIL.Image.Image, List[PIL.Image.Image]] = None,
mask_image: Union[torch.FloatTensor, PIL.Image.Image, List[PIL.Image.Image]] = None,
height: int = 1024,
width: int = 1024,
original_height: int = None,
original_width: int = None,
original_height_negative: int = None,
original_width_negative: int = None,
crop_top: int = 0,
crop_left: int = 0,
num_inference_steps: int = 50,
guidance_scale: float = 7.5,
negative_scale: float = None,
strength: float = 0.8,
# num_images_per_prompt: Optional[int] = 1,
eta: float = 0.0,
generator: Optional[torch.Generator] = None,
latents: Optional[torch.FloatTensor] = None,
max_embeddings_multiples: Optional[int] = 3,
output_type: Optional[str] = "pil",
vae_batch_size: float = None,
return_latents: bool = False,
# return_dict: bool = True,
callback: Optional[Callable[[int, int, torch.FloatTensor], None]] = None,
is_cancelled_callback: Optional[Callable[[], bool]] = None,
callback_steps: Optional[int] = 1,
img2img_noise=None,
clip_guide_images=None,
emb_normalize_mode: str = "original",
**kwargs,
):
# TODO support secondary prompt
num_images_per_prompt = 1 # fixed because already prompt is repeated
if isinstance(prompt, str):
batch_size = 1
prompt = [prompt]
elif isinstance(prompt, list):
batch_size = len(prompt)
else:
raise ValueError(f"`prompt` has to be of type `str` or `list` but is {type(prompt)}")
regional_network = " AND " in prompt[0]
vae_batch_size = (
batch_size
if vae_batch_size is None
else (int(vae_batch_size) if vae_batch_size >= 1 else max(1, int(batch_size * vae_batch_size)))
)
if strength < 0 or strength > 1:
raise ValueError(f"The value of strength should in [0.0, 1.0] but is {strength}")
if height % 8 != 0 or width % 8 != 0:
raise ValueError(f"`height` and `width` have to be divisible by 8 but are {height} and {width}.")
if (callback_steps is None) or (
callback_steps is not None and (not isinstance(callback_steps, int) or callback_steps <= 0)
):
raise ValueError(
f"`callback_steps` has to be a positive integer but is {callback_steps} of type" f" {type(callback_steps)}."
)
# get prompt text embeddings
# here `guidance_scale` is defined analog to the guidance weight `w` of equation (2)
# of the Imagen paper: https://arxiv.org/pdf/2205.11487.pdf . `guidance_scale = 1`
# corresponds to doing no classifier free guidance.
do_classifier_free_guidance = guidance_scale > 1.0
if not do_classifier_free_guidance and negative_scale is not None:
logger.warning(f"negative_scale is ignored if guidance scalle <= 1.0")
negative_scale = None
# get unconditional embeddings for classifier free guidance
if negative_prompt is None:
negative_prompt = [""] * batch_size
elif isinstance(negative_prompt, str):
negative_prompt = [negative_prompt] * batch_size
if batch_size != len(negative_prompt):
raise ValueError(
f"`negative_prompt`: {negative_prompt} has batch size {len(negative_prompt)}, but `prompt`:"
f" {prompt} has batch size {batch_size}. Please make sure that passed `negative_prompt` matches"
" the batch size of `prompt`."
)
tes_text_embs = []
tes_uncond_embs = []
tes_real_uncond_embs = []
for tokenizer, text_encoder in zip(self.tokenizers, self.text_encoders):
token_replacer = self.get_token_replacer(tokenizer)
# use last text_pool, because it is from text encoder 2
text_embeddings, text_pool, uncond_embeddings, uncond_pool, _ = get_weighted_text_embeddings(
self.is_sdxl,
tokenizer,
text_encoder,
prompt=prompt,
uncond_prompt=negative_prompt if do_classifier_free_guidance else None,
max_embeddings_multiples=max_embeddings_multiples,
clip_skip=self.clip_skip,
token_replacer=token_replacer,
device=self.device,
emb_normalize_mode=emb_normalize_mode,
**kwargs,
)
tes_text_embs.append(text_embeddings)
tes_uncond_embs.append(uncond_embeddings)
if negative_scale is not None:
_, real_uncond_embeddings, _ = get_weighted_text_embeddings(
self.is_sdxl,
token_replacer,
prompt=prompt, # こちらのトークン長に合わせてuncondを作るので75トークン超で必須
uncond_prompt=[""] * batch_size,
max_embeddings_multiples=max_embeddings_multiples,
clip_skip=self.clip_skip,
token_replacer=token_replacer,
device=self.device,
emb_normalize_mode=emb_normalize_mode,
**kwargs,
)
tes_real_uncond_embs.append(real_uncond_embeddings)
# concat text encoder outputs
text_embeddings = tes_text_embs[0]
uncond_embeddings = tes_uncond_embs[0]
for i in range(1, len(tes_text_embs)):
text_embeddings = torch.cat([text_embeddings, tes_text_embs[i]], dim=2) # n,77,2048
if do_classifier_free_guidance:
uncond_embeddings = torch.cat([uncond_embeddings, tes_uncond_embs[i]], dim=2) # n,77,2048
if do_classifier_free_guidance:
if negative_scale is None:
text_embeddings = torch.cat([uncond_embeddings, text_embeddings])
else:
text_embeddings = torch.cat([uncond_embeddings, text_embeddings, real_uncond_embeddings])
if self.control_net_lllites:
# ControlNetのhintにguide imageを流用する。ControlNetの場合はControlNet側で行う
if isinstance(clip_guide_images, PIL.Image.Image):
clip_guide_images = [clip_guide_images]
if isinstance(clip_guide_images[0], PIL.Image.Image):
clip_guide_images = [preprocess_image(im) for im in clip_guide_images]
clip_guide_images = torch.cat(clip_guide_images)
if isinstance(clip_guide_images, list):
clip_guide_images = torch.stack(clip_guide_images)
clip_guide_images = clip_guide_images.to(self.device, dtype=text_embeddings.dtype)
# create size embs
if original_height is None:
original_height = height
if original_width is None:
original_width = width
if original_height_negative is None:
original_height_negative = original_height
if original_width_negative is None:
original_width_negative = original_width
if crop_top is None:
crop_top = 0
if crop_left is None:
crop_left = 0
if self.is_sdxl:
emb1 = sdxl_train_util.get_timestep_embedding(torch.FloatTensor([original_height, original_width]).unsqueeze(0), 256)
uc_emb1 = sdxl_train_util.get_timestep_embedding(
torch.FloatTensor([original_height_negative, original_width_negative]).unsqueeze(0), 256
)
emb2 = sdxl_train_util.get_timestep_embedding(torch.FloatTensor([crop_top, crop_left]).unsqueeze(0), 256)
emb3 = sdxl_train_util.get_timestep_embedding(torch.FloatTensor([height, width]).unsqueeze(0), 256)
c_vector = torch.cat([emb1, emb2, emb3], dim=1).to(self.device, dtype=text_embeddings.dtype).repeat(batch_size, 1)
uc_vector = torch.cat([uc_emb1, emb2, emb3], dim=1).to(self.device, dtype=text_embeddings.dtype).repeat(batch_size, 1)
if regional_network:
# use last pool for conditioning
num_sub_prompts = len(text_pool) // batch_size
text_pool = text_pool[num_sub_prompts - 1 :: num_sub_prompts] # last subprompt
if init_image is not None and self.clip_vision_model is not None:
logger.info(f"encode by clip_vision_model and apply clip_vision_strength={self.clip_vision_strength}")
vision_input = self.clip_vision_processor(init_image, return_tensors="pt", device=self.device)
pixel_values = vision_input["pixel_values"].to(self.device, dtype=text_embeddings.dtype)
clip_vision_embeddings = self.clip_vision_model(
pixel_values=pixel_values, output_hidden_states=True, return_dict=True
)
clip_vision_embeddings = clip_vision_embeddings.image_embeds
if len(clip_vision_embeddings) == 1 and batch_size > 1:
clip_vision_embeddings = clip_vision_embeddings.repeat((batch_size, 1))
clip_vision_embeddings = clip_vision_embeddings * self.clip_vision_strength
assert clip_vision_embeddings.shape == text_pool.shape, f"{clip_vision_embeddings.shape} != {text_pool.shape}"
text_pool = clip_vision_embeddings # replace: same as ComfyUI (?)
c_vector = torch.cat([text_pool, c_vector], dim=1)
if do_classifier_free_guidance:
uc_vector = torch.cat([uncond_pool, uc_vector], dim=1)
vector_embeddings = torch.cat([uc_vector, c_vector])
else:
vector_embeddings = c_vector
# set timesteps
self.scheduler.set_timesteps(num_inference_steps, self.device)
latents_dtype = text_embeddings.dtype
init_latents_orig = None
mask = None
if init_image is None:
# get the initial random noise unless the user supplied it
# Unlike in other pipelines, latents need to be generated in the target device
# for 1-to-1 results reproducibility with the CompVis implementation.
# However this currently doesn't work in `mps`.
latents_shape = (
batch_size * num_images_per_prompt,
self.unet.in_channels,
height // 8,
width // 8,
)
if latents is None:
if self.device.type == "mps":
# randn does not exist on mps
latents = torch.randn(
latents_shape,
generator=generator,
device="cpu",
dtype=latents_dtype,
).to(self.device)
else:
latents = torch.randn(
latents_shape,
generator=generator,
device=self.device,
dtype=latents_dtype,
)
else:
if latents.shape != latents_shape:
raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {latents_shape}")
latents = latents.to(self.device)
timesteps = self.scheduler.timesteps.to(self.device)
# scale the initial noise by the standard deviation required by the scheduler
latents = latents * self.scheduler.init_noise_sigma
else:
# image to tensor
if isinstance(init_image, PIL.Image.Image):
init_image = [init_image]
if isinstance(init_image[0], PIL.Image.Image):
init_image = [preprocess_image(im) for im in init_image]
init_image = torch.cat(init_image)
if isinstance(init_image, list):
init_image = torch.stack(init_image)
# mask image to tensor
if mask_image is not None:
if isinstance(mask_image, PIL.Image.Image):
mask_image = [mask_image]
if isinstance(mask_image[0], PIL.Image.Image):
mask_image = torch.cat([preprocess_mask(im) for im in mask_image]) # H*W, 0 for repaint
# encode the init image into latents and scale the latents
init_image = init_image.to(device=self.device, dtype=latents_dtype)
if init_image.size()[-2:] == (height // 8, width // 8):
init_latents = init_image
else:
if vae_batch_size >= batch_size:
init_latent_dist = self.vae.encode(init_image.to(self.vae.dtype)).latent_dist
init_latents = init_latent_dist.sample(generator=generator)
else:
if torch.cuda.is_available():
torch.cuda.empty_cache()
init_latents = []
for i in tqdm(range(0, min(batch_size, len(init_image)), vae_batch_size)):
init_latent_dist = self.vae.encode(
(init_image[i : i + vae_batch_size] if vae_batch_size > 1 else init_image[i].unsqueeze(0)).to(
self.vae.dtype
)
).latent_dist
init_latents.append(init_latent_dist.sample(generator=generator))
init_latents = torch.cat(init_latents)
init_latents = (sdxl_model_util.VAE_SCALE_FACTOR if self.is_sdxl else 0.18215) * init_latents
if len(init_latents) == 1:
init_latents = init_latents.repeat((batch_size, 1, 1, 1))
init_latents_orig = init_latents
# preprocess mask
if mask_image is not None:
mask = mask_image.to(device=self.device, dtype=latents_dtype)
if len(mask) == 1:
mask = mask.repeat((batch_size, 1, 1, 1))
# check sizes
if not mask.shape == init_latents.shape:
raise ValueError("The mask and init_image should be the same size!")
# get the original timestep using init_timestep
offset = self.scheduler.config.get("steps_offset", 0)
init_timestep = int(num_inference_steps * strength) + offset
init_timestep = min(init_timestep, num_inference_steps)
timesteps = self.scheduler.timesteps[-init_timestep]
timesteps = torch.tensor([timesteps] * batch_size * num_images_per_prompt, device=self.device)
# add noise to latents using the timesteps
latents = self.scheduler.add_noise(init_latents, img2img_noise, timesteps)
t_start = max(num_inference_steps - init_timestep + offset, 0)
timesteps = self.scheduler.timesteps[t_start:].to(self.device)
# prepare extra kwargs for the scheduler step, since not all schedulers have the same signature
# eta (η) is only used with the DDIMScheduler, it will be ignored for other schedulers.
# eta corresponds to η in DDIM paper: https://arxiv.org/abs/2010.02502
# and should be between [0, 1]
accepts_eta = "eta" in set(inspect.signature(self.scheduler.step).parameters.keys())
extra_step_kwargs = {}
if accepts_eta:
extra_step_kwargs["eta"] = eta
num_latent_input = (3 if negative_scale is not None else 2) if do_classifier_free_guidance else 1
if self.control_nets:
guided_hints = original_control_net.get_guided_hints(self.control_nets, num_latent_input, batch_size, clip_guide_images)
each_control_net_enabled = [self.control_net_enabled] * len(self.control_nets)
if self.control_net_lllites:
# guided_hints = original_control_net.get_guided_hints(self.control_nets, num_latent_input, batch_size, clip_guide_images)
if self.control_net_enabled:
for control_net, _ in self.control_net_lllites:
with torch.no_grad():
control_net.set_cond_image(clip_guide_images)
else:
for control_net, _ in self.control_net_lllites:
control_net.set_cond_image(None)
each_control_net_enabled = [self.control_net_enabled] * len(self.control_net_lllites)
enable_gradual_latent = False
if self.gradual_latent:
if not hasattr(self.scheduler, "set_gradual_latent_params"):
logger.warning("gradual_latent is not supported for this scheduler. Ignoring.")
logger.warning(f"{self.scheduler.__class__.__name__}")
else:
enable_gradual_latent = True
step_elapsed = 1000
current_ratio = self.gradual_latent.ratio
# first, we downscale the latents to the specified ratio / 最初に指定された比率にlatentsをダウンスケールする
height, width = latents.shape[-2:]
org_dtype = latents.dtype
if org_dtype == torch.bfloat16:
latents = latents.float()
latents = torch.nn.functional.interpolate(
latents, scale_factor=current_ratio, mode="bicubic", align_corners=False
).to(org_dtype)
# apply unsharp mask / アンシャープマスクを適用する
if self.gradual_latent.gaussian_blur_ksize:
latents = self.gradual_latent.apply_unshark_mask(latents)
for i, t in enumerate(tqdm(timesteps)):
resized_size = None
if enable_gradual_latent:
# gradually upscale the latents / latentsを徐々にアップスケールする
if (
t < self.gradual_latent.start_timesteps
and current_ratio < 1.0
and step_elapsed >= self.gradual_latent.every_n_steps
):
current_ratio = min(current_ratio + self.gradual_latent.ratio_step, 1.0)
# make divisible by 8 because size of latents must be divisible at bottom of UNet
h = int(height * current_ratio) // 8 * 8
w = int(width * current_ratio) // 8 * 8
resized_size = (h, w)
self.scheduler.set_gradual_latent_params(resized_size, self.gradual_latent)
step_elapsed = 0
else:
self.scheduler.set_gradual_latent_params(None, None)
step_elapsed += 1
# expand the latents if we are doing classifier free guidance
latent_model_input = latents.repeat((num_latent_input, 1, 1, 1))
latent_model_input = self.scheduler.scale_model_input(latent_model_input, t)
# disable ControlNet-LLLite if ratio is set. ControlNet is disabled in ControlNetInfo
if self.control_net_lllites:
for j, ((control_net, ratio), enabled) in enumerate(zip(self.control_net_lllites, each_control_net_enabled)):
if not enabled or ratio >= 1.0:
continue
if ratio < i / len(timesteps):
logger.info(f"ControlNetLLLite {j} is disabled (ratio={ratio} at {i} / {len(timesteps)})")
control_net.set_cond_image(None)
each_control_net_enabled[j] = False
# predict the noise residual
if self.control_nets and self.control_net_enabled:
if regional_network:
num_sub_and_neg_prompts = len(text_embeddings) // batch_size
text_emb_last = text_embeddings[num_sub_and_neg_prompts - 2 :: num_sub_and_neg_prompts] # last subprompt
else:
text_emb_last = text_embeddings
noise_pred = original_control_net.call_unet_and_control_net(
i,
num_latent_input,
self.unet,
self.control_nets,
guided_hints,
i / len(timesteps),
latent_model_input,
t,
text_embeddings,
text_emb_last,
).sample
elif self.is_sdxl:
noise_pred = self.unet(latent_model_input, t, text_embeddings, vector_embeddings)
else:
noise_pred = self.unet(latent_model_input, t, encoder_hidden_states=text_embeddings).sample
# perform guidance
if do_classifier_free_guidance:
if negative_scale is None:
noise_pred_uncond, noise_pred_text = noise_pred.chunk(num_latent_input) # uncond by negative prompt
noise_pred = noise_pred_uncond + guidance_scale * (noise_pred_text - noise_pred_uncond)
else:
noise_pred_negative, noise_pred_text, noise_pred_uncond = noise_pred.chunk(
num_latent_input
) # uncond is real uncond
noise_pred = (
noise_pred_uncond
+ guidance_scale * (noise_pred_text - noise_pred_uncond)
- negative_scale * (noise_pred_negative - noise_pred_uncond)
)
# compute the previous noisy sample x_t -> x_t-1
latents = self.scheduler.step(noise_pred, t, latents, **extra_step_kwargs).prev_sample
if mask is not None:
# masking
init_latents_proper = self.scheduler.add_noise(init_latents_orig, img2img_noise, torch.tensor([t]))
latents = (init_latents_proper * mask) + (latents * (1 - mask))
# call the callback, if provided
if i % callback_steps == 0:
if callback is not None:
callback(i, t, latents)
if is_cancelled_callback is not None and is_cancelled_callback():
return None
if return_latents:
return latents
latents = 1 / (sdxl_model_util.VAE_SCALE_FACTOR if self.is_sdxl else 0.18215) * latents
if vae_batch_size >= batch_size:
image = self.vae.decode(latents.to(self.vae.dtype)).sample
else:
if torch.cuda.is_available():
torch.cuda.empty_cache()
images = []
for i in tqdm(range(0, batch_size, vae_batch_size)):
images.append(
self.vae.decode(
(latents[i : i + vae_batch_size] if vae_batch_size > 1 else latents[i].unsqueeze(0)).to(self.vae.dtype)
).sample
)
image = torch.cat(images)
image = (image / 2 + 0.5).clamp(0, 1)
# we always cast to float32 as this does not cause significant overhead and is compatible with bfloa16
image = image.cpu().permute(0, 2, 3, 1).float().numpy()
if torch.cuda.is_available():
torch.cuda.empty_cache()
if output_type == "pil":
# image = self.numpy_to_pil(image)
image = (image * 255).round().astype("uint8")
image = [Image.fromarray(im) for im in image]
return image
# return StableDiffusionPipelineOutput(images=image, nsfw_content_detected=has_nsfw_concept)
re_attention = re.compile(
r"""
\\\(|
\\\)|
\\\[|
\\]|
\\\\|
\\|
\(|
\[|
:([+-]?[.\d]+)\)|
\)|
]|
[^\\()\[\]:]+|
:
""",
re.X,
)
def parse_prompt_attention(text):
"""
Parses a string with attention tokens and returns a list of pairs: text and its associated weight.
Accepted tokens are:
(abc) - increases attention to abc by a multiplier of 1.1
(abc:3.12) - increases attention to abc by a multiplier of 3.12
[abc] - decreases attention to abc by a multiplier of 1.1
\( - literal character '('
\[ - literal character '['
\) - literal character ')'
\] - literal character ']'
\\ - literal character '\'
anything else - just text
>>> parse_prompt_attention('normal text')
[['normal text', 1.0]]
>>> parse_prompt_attention('an (important) word')
[['an ', 1.0], ['important', 1.1], [' word', 1.0]]
>>> parse_prompt_attention('(unbalanced')
[['unbalanced', 1.1]]
>>> parse_prompt_attention('\(literal\]')
[['(literal]', 1.0]]
>>> parse_prompt_attention('(unnecessary)(parens)')
[['unnecessaryparens', 1.1]]
>>> parse_prompt_attention('a (((house:1.3)) [on] a (hill:0.5), sun, (((sky))).')
[['a ', 1.0],
['house', 1.5730000000000004],
[' ', 1.1],
['on', 1.0],
[' a ', 1.1],
['hill', 0.55],
[', sun, ', 1.1],
['sky', 1.4641000000000006],
['.', 1.1]]
"""
res = []
round_brackets = []
square_brackets = []
round_bracket_multiplier = 1.1
square_bracket_multiplier = 1 / 1.1
def multiply_range(start_position, multiplier):
for p in range(start_position, len(res)):
res[p][1] *= multiplier
# keep break as separate token
text = text.replace("BREAK", "\\BREAK\\")
for m in re_attention.finditer(text):
text = m.group(0)
weight = m.group(1)
if text.startswith("\\"):
res.append([text[1:], 1.0])
elif text == "(":
round_brackets.append(len(res))
elif text == "[":
square_brackets.append(len(res))
elif weight is not None and len(round_brackets) > 0:
multiply_range(round_brackets.pop(), float(weight))
elif text == ")" and len(round_brackets) > 0:
multiply_range(round_brackets.pop(), round_bracket_multiplier)
elif text == "]" and len(square_brackets) > 0:
multiply_range(square_brackets.pop(), square_bracket_multiplier)
else:
res.append([text, 1.0])
for pos in round_brackets:
multiply_range(pos, round_bracket_multiplier)
for pos in square_brackets:
multiply_range(pos, square_bracket_multiplier)
if len(res) == 0:
res = [["", 1.0]]
# merge runs of identical weights
i = 0
while i + 1 < len(res):
if res[i][1] == res[i + 1][1] and res[i][0].strip() != "BREAK" and res[i + 1][0].strip() != "BREAK":
res[i][0] += res[i + 1][0]
res.pop(i + 1)
else:
i += 1