

import tempfile
import unittest

from diffusers import (
    DDIMScheduler,
    DDPMScheduler,
    DPMSolverMultistepScheduler,
    EulerAncestralDiscreteScheduler,
    EulerDiscreteScheduler,
    PNDMScheduler,
    logging,
)
from diffusers.configuration_utils import ConfigMixin, register_to_config
from diffusers.utils.testing_utils import CaptureLogger





class 			snake_case_     (	__A      ):







			'''simple docstring'''

			SCREAMING_SNAKE_CASE  :     Tuple		    =       "config.json"







			@register_to_config
			def __init__(  self				:       Optional[int]							,     _UpperCamelCase				:       Any=2							,     _UpperCamelCase				:       List[str]=5							,     _UpperCamelCase				:       Optional[Any]=(2, 5)							,     _UpperCamelCase				:       Dict="for diffusion"							,     _UpperCamelCase				:       Optional[int]=[1, 3]							,     )   ->List[str]:
									pass






class 			snake_case_     (	__A      ):







			'''simple docstring'''

			SCREAMING_SNAKE_CASE  :     Optional[Any]		    =       "config.json"







			@register_to_config
			def __init__(  self				:       Optional[Any]							,     _UpperCamelCase				:       List[str]=2							,     _UpperCamelCase				:       Union[str, Any]=5							,     _UpperCamelCase				:       Optional[Any]=(2, 5)							,     _UpperCamelCase				:       Tuple="for diffusion"							,     _UpperCamelCase				:       List[str]=[1, 3]							,     )   ->Union[str, Any]:
									pass






class 			snake_case_     (	__A      ):







			'''simple docstring'''

			SCREAMING_SNAKE_CASE  :     int		    =       "config.json"







			@register_to_config
			def __init__(  self				:       List[Any]							,     _UpperCamelCase				:       Optional[int]=2							,     _UpperCamelCase				:       Optional[int]=5							,     _UpperCamelCase				:       List[str]=(2, 5)							,     _UpperCamelCase				:       Union[str, Any]="for diffusion"							,     _UpperCamelCase				:       Union[str, Any]=[1, 3]							,     _UpperCamelCase				:       List[str]=[1, 3]							,     )   ->Union[str, Any]:
									pass






class 			snake_case_     (	__A      ):







			'''simple docstring'''

			SCREAMING_SNAKE_CASE  :     List[str]		    =       "config.json"







			@register_to_config
			def __init__(  self				:       List[Any]							,     _UpperCamelCase				:       Optional[Any]=2							,     _UpperCamelCase				:       Any=5							,     _UpperCamelCase				:       List[Any]=(2, 5)							,     _UpperCamelCase				:       Union[str, Any]="for diffusion"							,     _UpperCamelCase				:       Dict=[1, 5]							,     _UpperCamelCase				:       Tuple=[5, 4]							,     )   ->Dict:
									pass






class 			snake_case_     (	unittest.TestCase      ):







			'''simple docstring'''

			def        snake_case__(  self				:       List[Any]							)   ->Tuple:
									with self.assertRaises(_UpperCamelCase							):
															ConfigMixin.load_config('''dummy_path'''							)







			def        snake_case__(  self				:       str							)   ->Union[str, Any]:
									snake_case_     =			SampleObject()
									snake_case_     =			obj.config
									assert config["a"] == 2
									assert config["b"] == 5
									assert config["c"] == (2, 5)
									assert config["d"] == "for diffusion"
									assert config["e"] == [1, 3]

									# init ignore private arguments
									snake_case_     =			SampleObject(_name_or_path='''lalala'''							)
									snake_case_     =			obj.config
									assert config["a"] == 2
									assert config["b"] == 5
									assert config["c"] == (2, 5)
									assert config["d"] == "for diffusion"
									assert config["e"] == [1, 3]

									# can override default
									snake_case_     =			SampleObject(c=6							)
									snake_case_     =			obj.config
									assert config["a"] == 2
									assert config["b"] == 5
									assert config["c"] == 6
									assert config["d"] == "for diffusion"
									assert config["e"] == [1, 3]

									# can use positional arguments.
									snake_case_     =			SampleObject(1							,     c=6							)
									snake_case_     =			obj.config
									assert config["a"] == 1
									assert config["b"] == 5
									assert config["c"] == 6
									assert config["d"] == "for diffusion"
									assert config["e"] == [1, 3]







			def        snake_case__(  self				:       Any							)   ->List[Any]:
									snake_case_     =			SampleObject()
									snake_case_     =			obj.config

									assert config["a"] == 2
									assert config["b"] == 5
									assert config["c"] == (2, 5)
									assert config["d"] == "for diffusion"
									assert config["e"] == [1, 3]

									with tempfile.TemporaryDirectory() as tmpdirname:
															obj.save_config(_UpperCamelCase							)
															snake_case_     =			SampleObject.from_config(SampleObject.load_config(_UpperCamelCase							)							)
															snake_case_     =			new_obj.config

									# unfreeze configs
									snake_case_     =			dict(_UpperCamelCase							)
									snake_case_     =			dict(_UpperCamelCase							)

									assert config.pop('''c'''							) == (2, 5)  # instantiated as tuple
									assert new_config.pop('''c'''							) == [2, 5]  # saved & loaded as list because of json
									config.pop('''_use_default_values'''							)
									assert config == new_config







			def        snake_case__(  self				:       List[str]							)   ->Optional[int]:
									snake_case_     =			logging.get_logger('''diffusers.configuration_utils'''							)
									# 30 for warning
									logger.setLevel(3_0							)

									with CaptureLogger(_UpperCamelCase							) as cap_logger:
															snake_case_     =			DDIMScheduler.from_pretrained(
															    '''hf-internal-testing/tiny-stable-diffusion-torch'''							,     subfolder='''scheduler'''							)

									assert ddim.__class__ == DDIMScheduler
									# no warning should be thrown
									assert cap_logger.out == ""







			def        snake_case__(  self				:       Tuple							)   ->str:
									snake_case_     =			logging.get_logger('''diffusers.configuration_utils'''							)
									# 30 for warning
									logger.setLevel(3_0							)

									with CaptureLogger(_UpperCamelCase							) as cap_logger:
															snake_case_     =			EulerDiscreteScheduler.from_pretrained(
															    '''hf-internal-testing/tiny-stable-diffusion-torch'''							,     subfolder='''scheduler'''							)

									assert euler.__class__ == EulerDiscreteScheduler
									# no warning should be thrown
									assert cap_logger.out == ""







			def        snake_case__(  self				:       Any							)   ->Optional[Any]:
									snake_case_     =			logging.get_logger('''diffusers.configuration_utils'''							)
									# 30 for warning
									logger.setLevel(3_0							)

									with CaptureLogger(_UpperCamelCase							) as cap_logger:
															snake_case_     =			EulerAncestralDiscreteScheduler.from_pretrained(
															    '''hf-internal-testing/tiny-stable-diffusion-torch'''							,     subfolder='''scheduler'''							)

									assert euler.__class__ == EulerAncestralDiscreteScheduler
									# no warning should be thrown
									assert cap_logger.out == ""







			def        snake_case__(  self				:       Optional[int]							)   ->Any:
									snake_case_     =			logging.get_logger('''diffusers.configuration_utils'''							)
									# 30 for warning
									logger.setLevel(3_0							)

									with CaptureLogger(_UpperCamelCase							) as cap_logger:
															snake_case_     =			PNDMScheduler.from_pretrained(
															    '''hf-internal-testing/tiny-stable-diffusion-torch'''							,     subfolder='''scheduler'''							)

									assert pndm.__class__ == PNDMScheduler
									# no warning should be thrown
									assert cap_logger.out == ""







			def        snake_case__(  self				:       List[str]							)   ->List[Any]:
									snake_case_     =			logging.get_logger('''diffusers.configuration_utils'''							)
									# 30 for warning
									logger.setLevel(3_0							)

									with CaptureLogger(_UpperCamelCase							) as cap_logger:
															snake_case_     =			DDPMScheduler.from_pretrained(
															    '''hf-internal-testing/tiny-stable-diffusion-torch'''							,     subfolder='''scheduler'''							,     prediction_type='''sample'''							,     beta_end=8							,     )

									with CaptureLogger(_UpperCamelCase							) as cap_logger_a:
															snake_case_     =			DDPMScheduler.from_pretrained('''google/ddpm-celebahq-256'''							,     beta_start=8_8							)

									assert ddpm.__class__ == DDPMScheduler
									assert ddpm.config.prediction_type == "sample"
									assert ddpm.config.beta_end == 8
									assert ddpm_a.config.beta_start == 8_8

									# no warning should be thrown
									assert cap_logger.out == ""
									assert cap_logger_a.out == ""







			def        snake_case__(  self				:       List[Any]							)   ->Optional[Any]:
									snake_case_     =			logging.get_logger('''diffusers.configuration_utils'''							)
									# 30 for warning
									logger.setLevel(3_0							)

									with CaptureLogger(_UpperCamelCase							) as cap_logger:
															snake_case_     =			DPMSolverMultistepScheduler.from_pretrained(
															    '''hf-internal-testing/tiny-stable-diffusion-torch'''							,     subfolder='''scheduler'''							)

									assert dpm.__class__ == DPMSolverMultistepScheduler
									# no warning should be thrown
									assert cap_logger.out == ""







			def        snake_case__(  self				:       Dict							)   ->Dict:
									# let's first save a config that should be in the form
									#    a=2,
									#    b=5,
									#    c=(2, 5),
									#    d="for diffusion",
									#    e=[1, 3],

									snake_case_     =			SampleObject()

									snake_case_     =			{k: v for k, v in config.config.items() if not k.startswith('''_'''							)}

									# make sure that default config has all keys in `_use_default_values`
									assert set(config_dict.keys()							) == set(config.config._use_default_values							)

									with tempfile.TemporaryDirectory() as tmpdirname:
															config.save_config(_UpperCamelCase							)

															# now loading it with SampleObject2 should put f into `_use_default_values`
															snake_case_     =			SampleObjecta.from_config(_UpperCamelCase							)

															assert "f" in config._use_default_values
															assert config.f == [1, 3]

									# now loading the config, should **NOT** use [1, 3] for `f`, but the default [1, 4] value
									# **BECAUSE** it is part of `config._use_default_values`
									snake_case_     =			SampleObjecta.from_config(config.config							)
									assert new_config.f == [5, 4]

									config.config._use_default_values.pop()
									snake_case_     =			SampleObjecta.from_config(config.config							)
									assert new_config_a.f == [1, 3]

									# Nevertheless "e" should still be correctly loaded to [1, 3] from SampleObject2 instead of defaulting to [1, 5]
									assert new_config_a.e == [1, 3]


import inspect
from typing import List, Optional, Union

import torch
from torch import nn
from torch.nn import functional as F
from torchvision import transforms
from transformers import CLIPImageProcessor, CLIPModel, CLIPTextModel, CLIPTokenizer

from diffusers import (
    AutoencoderKL,
    DDIMScheduler,
    DiffusionPipeline,
    DPMSolverMultistepScheduler,
    LMSDiscreteScheduler,
    PNDMScheduler,
    UNetaDConditionModel,
)
from diffusers.pipelines.stable_diffusion.pipeline_stable_diffusion import StableDiffusionPipelineOutput





class 			snake_case_     (	nn.Module      ):







			'''simple docstring'''

			def __init__(  self				:       Optional[Any]							,     _UpperCamelCase				:       Dict							,     _UpperCamelCase				:       List[str]=1.0							)   ->Tuple:
									super().__init__()

									snake_case_     =			cut_size
									snake_case_     =			cut_power







			def        snake_case__(  self				:       str							,     _UpperCamelCase				:       List[str]							,     _UpperCamelCase				:       Dict							)   ->Union[str, Any]:
									snake_case_,					snake_case_     =			pixel_values.shape[2:4]
									snake_case_     =			min(_UpperCamelCase							,     _UpperCamelCase							)
									snake_case_     =			min(_UpperCamelCase							,     _UpperCamelCase							,     self.cut_size							)
									snake_case_     =			[]
									for _ in range(_UpperCamelCase							):
															snake_case_     =			int(torch.rand([]							) ** self.cut_power * (max_size - min_size) + min_size							)
															snake_case_     =			torch.randint(0							,     sideX - size + 1							,     ()							)
															snake_case_     =			torch.randint(0							,     sideY - size + 1							,     ()							)
															snake_case_     =			pixel_values[:, :, offsety : offsety + size, offsetx : offsetx + size]
															cutouts.append(F.adaptive_avg_poolad(_UpperCamelCase							,     self.cut_size							)							)
									return torch.cat(_UpperCamelCase							)






def 						__SCREAMING_SNAKE_CASE      (SCREAMING_SNAKE_CASE__						,	SCREAMING_SNAKE_CASE__ ):
						snake_case_     =			F.normalize(SCREAMING_SNAKE_CASE__						,	dim=-1 )
						snake_case_     =			F.normalize(SCREAMING_SNAKE_CASE__						,	dim=-1 )
						return (x - y).norm(dim=-1 ).div(2 ).arcsin().pow(2 ).mul(2 )


def 						__SCREAMING_SNAKE_CASE      (SCREAMING_SNAKE_CASE__						,	SCREAMING_SNAKE_CASE__ ):
						for param in model.parameters():
												snake_case_     =			value





class 			snake_case_     (	__A      ):







			'''simple docstring'''

			def __init__(  self				:       List[Any]							,     _UpperCamelCase				:       AutoencoderKL							,     _UpperCamelCase				:       CLIPTextModel							,     _UpperCamelCase				:       CLIPModel							,     _UpperCamelCase				:       CLIPTokenizer							,     _UpperCamelCase				:       UNetaDConditionModel							,     _UpperCamelCase				:       Union[PNDMScheduler, LMSDiscreteScheduler, DDIMScheduler, DPMSolverMultistepScheduler]							,     _UpperCamelCase				:       CLIPImageProcessor							,     )   ->Union[str, Any]:
									super().__init__()
									self.register_modules(
									    vae=_UpperCamelCase							,     text_encoder=_UpperCamelCase							,     clip_model=_UpperCamelCase							,     tokenizer=_UpperCamelCase							,     unet=_UpperCamelCase							,     scheduler=_UpperCamelCase							,     feature_extractor=_UpperCamelCase							,     )

									snake_case_     =			transforms.Normalize(mean=feature_extractor.image_mean							,     std=feature_extractor.image_std							)
									snake_case_     =			(
									    feature_extractor.size
									    if isinstance(feature_extractor.size							,     _UpperCamelCase							)
									    else feature_extractor.size['''shortest_edge''']
									)
									snake_case_     =			MakeCutouts(self.cut_out_size							)

									set_requires_grad(self.text_encoder							,     _UpperCamelCase							)
									set_requires_grad(self.clip_model							,     _UpperCamelCase							)







			def        snake_case__(  self				:       List[Any]							,     _UpperCamelCase				:       Optional[Union[str, int]] = "auto"							)   ->int:
									if slice_size == "auto":
															# half the attention head size is usually a good trade-off between
															# speed and memory
															snake_case_     =			self.unet.config.attention_head_dim // 2
									self.unet.set_attention_slice(_UpperCamelCase							)







			def        snake_case__(  self				:       str							)   ->Optional[Any]:
									self.enable_attention_slicing(_UpperCamelCase							)







			def        snake_case__(  self				:       Any							)   ->Union[str, Any]:
									set_requires_grad(self.vae							,     _UpperCamelCase							)







			def        snake_case__(  self				:       Any							)   ->Dict:
									set_requires_grad(self.vae							,     _UpperCamelCase							)







			def        snake_case__(  self				:       Dict							)   ->Optional[int]:
									set_requires_grad(self.unet							,     _UpperCamelCase							)







			def        snake_case__(  self				:       Optional[int]							)   ->List[Any]:
									set_requires_grad(self.unet							,     _UpperCamelCase							)







			@torch.enable_grad()
			def        snake_case__(  self				:       Optional[Any]							,     _UpperCamelCase				:       Tuple							,     _UpperCamelCase				:       str							,     _UpperCamelCase				:       Any							,     _UpperCamelCase				:       Union[str, Any]							,     _UpperCamelCase				:       Union[str, Any]							,     _UpperCamelCase				:       Union[str, Any]							,     _UpperCamelCase				:       Optional[Any]							,     _UpperCamelCase				:       Optional[int]							,     _UpperCamelCase				:       Tuple=True							,     )   ->Union[str, Any]:
									snake_case_     =			latents.detach().requires_grad_()

									snake_case_     =			self.scheduler.scale_model_input(_UpperCamelCase							,     _UpperCamelCase							)

									# predict the noise residual
									snake_case_     =			self.unet(_UpperCamelCase							,     _UpperCamelCase							,     encoder_hidden_states=_UpperCamelCase							).sample

									if isinstance(self.scheduler							,     (PNDMScheduler, DDIMScheduler, DPMSolverMultistepScheduler)							):
															snake_case_     =			self.scheduler.alphas_cumprod[timestep]
															snake_case_     =			1 - alpha_prod_t
															# compute predicted original sample from predicted noise also called
															# "predicted x_0" of formula (12) from https://arxiv.org/pdf/2010.02502.pdf
															snake_case_     =			(latents - beta_prod_t ** 0.5 * noise_pred) / alpha_prod_t ** 0.5

															snake_case_     =			torch.sqrt(_UpperCamelCase							)
															snake_case_     =			pred_original_sample * (fac) + latents * (1 - fac)
									elif isinstance(self.scheduler							,     _UpperCamelCase							):
															snake_case_     =			self.scheduler.sigmas[index]
															snake_case_     =			latents - sigma * noise_pred
									else:
															raise ValueError(f'''scheduler type {type(self.scheduler							)} not supported'''							)

									snake_case_     =			1 / self.vae.config.scaling_factor * sample
									snake_case_     =			self.vae.decode(_UpperCamelCase							).sample
									snake_case_     =			(image / 2 + 0.5).clamp(0							,     1							)

									if use_cutouts:
															snake_case_     =			self.make_cutouts(_UpperCamelCase							,     _UpperCamelCase							)
									else:
															snake_case_     =			transforms.Resize(self.cut_out_size							)(_UpperCamelCase							)
									snake_case_     =			self.normalize(_UpperCamelCase							).to(latents.dtype							)

									snake_case_     =			self.clip_model.get_image_features(_UpperCamelCase							)
									snake_case_     =			image_embeddings_clip / image_embeddings_clip.norm(p=2							,     dim=-1							,     keepdim=_UpperCamelCase							)

									if use_cutouts:
															snake_case_     =			spherical_dist_loss(_UpperCamelCase							,     _UpperCamelCase							)
															snake_case_     =			dists.view([num_cutouts, sample.shape[0], -1]							)
															snake_case_     =			dists.sum(2							).mean(0							).sum() * clip_guidance_scale
									else:
															snake_case_     =			spherical_dist_loss(_UpperCamelCase							,     _UpperCamelCase							).mean() * clip_guidance_scale

									snake_case_     =			-torch.autograd.grad(_UpperCamelCase							,     _UpperCamelCase							)[0]

									if isinstance(self.scheduler							,     _UpperCamelCase							):
															snake_case_     =			latents.detach() + grads * (sigma**2)
															snake_case_     =			noise_pred_original
									else:
															snake_case_     =			noise_pred_original - torch.sqrt(_UpperCamelCase							) * grads
									return noise_pred, latents







			@torch.no_grad()
			def __call__(  self				:       Optional[int]							,     _UpperCamelCase				:       Union[str, List[str]]							,     _UpperCamelCase				:       Optional[int] = 5_1_2							,     _UpperCamelCase				:       Optional[int] = 5_1_2							,     _UpperCamelCase				:       Optional[int] = 5_0							,     _UpperCamelCase				:       Optional[float] = 7.5							,     _UpperCamelCase				:       Optional[int] = 1							,     _UpperCamelCase				:       float = 0.0							,     _UpperCamelCase				:       Optional[float] = 1_0_0							,     _UpperCamelCase				:       Optional[Union[str, List[str]]] = None							,     _UpperCamelCase				:       Optional[int] = 4							,     _UpperCamelCase				:       Optional[bool] = True							,     _UpperCamelCase				:       Optional[torch.Generator] = None							,     _UpperCamelCase				:       Optional[torch.FloatTensor] = None							,     _UpperCamelCase				:       Optional[str] = "pil"							,     _UpperCamelCase				:       bool = True							,     )   ->str:
									if isinstance(_UpperCamelCase							,     _UpperCamelCase							):
															snake_case_     =			1
									elif isinstance(_UpperCamelCase							,     _UpperCamelCase							):
															snake_case_     =			len(_UpperCamelCase							)
									else:
															raise ValueError(f'''`prompt` has to be of type `str` or `list` but is {type(_UpperCamelCase							)}'''							)

									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}.'''							)

									# get prompt text embeddings
									snake_case_     =			self.tokenizer(
									    _UpperCamelCase							,     padding='''max_length'''							,     max_length=self.tokenizer.model_max_length							,     truncation=_UpperCamelCase							,     return_tensors='''pt'''							,     )
									snake_case_     =			self.text_encoder(text_input.input_ids.to(self.device							)							)[0]
									# duplicate text embeddings for each generation per prompt
									snake_case_     =			text_embeddings.repeat_interleave(_UpperCamelCase							,     dim=0							)

									if clip_guidance_scale > 0:
															if clip_prompt is not None:
																					snake_case_     =			self.tokenizer(
																					    _UpperCamelCase							,     padding='''max_length'''							,     max_length=self.tokenizer.model_max_length							,     truncation=_UpperCamelCase							,     return_tensors='''pt'''							,     ).input_ids.to(self.device							)
															else:
																					snake_case_     =			text_input.input_ids.to(self.device							)
															snake_case_     =			self.clip_model.get_text_features(_UpperCamelCase							)
															snake_case_     =			text_embeddings_clip / text_embeddings_clip.norm(p=2							,     dim=-1							,     keepdim=_UpperCamelCase							)
															# duplicate text embeddings clip for each generation per prompt
															snake_case_     =			text_embeddings_clip.repeat_interleave(_UpperCamelCase							,     dim=0							)

									# 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.
									snake_case_     =			guidance_scale > 1.0
									# get unconditional embeddings for classifier free guidance
									if do_classifier_free_guidance:
															snake_case_     =			text_input.input_ids.shape[-1]
															snake_case_     =			self.tokenizer(['''''']							,     padding='''max_length'''							,     max_length=_UpperCamelCase							,     return_tensors='''pt'''							)
															snake_case_     =			self.text_encoder(uncond_input.input_ids.to(self.device							)							)[0]
															# duplicate unconditional embeddings for each generation per prompt
															snake_case_     =			uncond_embeddings.repeat_interleave(_UpperCamelCase							,     dim=0							)

															# For classifier free guidance, we need to do two forward passes.
															# Here we concatenate the unconditional and text embeddings into a single batch
															# to avoid doing two forward passes
															snake_case_     =			torch.cat([uncond_embeddings, text_embeddings]							)

									# 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`.
									snake_case_     =			(batch_size * num_images_per_prompt, self.unet.config.in_channels, height // 8, width // 8)
									snake_case_     =			text_embeddings.dtype
									if latents is None:
															if self.device.type == "mps":
																					# randn does not work reproducibly on mps
																					snake_case_     =			torch.randn(_UpperCamelCase							,     generator=_UpperCamelCase							,     device='''cpu'''							,     dtype=_UpperCamelCase							).to(
																					    self.device							)
															else:
																					snake_case_     =			torch.randn(_UpperCamelCase							,     generator=_UpperCamelCase							,     device=self.device							,     dtype=_UpperCamelCase							)
									else:
															if latents.shape != latents_shape:
																					raise ValueError(f'''Unexpected latents shape, got {latents.shape}, expected {latents_shape}'''							)
															snake_case_     =			latents.to(self.device							)

									# set timesteps
									snake_case_     =			'''offset''' in set(inspect.signature(self.scheduler.set_timesteps							).parameters.keys()							)
									snake_case_     =			{}
									if accepts_offset:
															snake_case_     =			1

									self.scheduler.set_timesteps(_UpperCamelCase							,     **_UpperCamelCase							)

									# Some schedulers like PNDM have timesteps as arrays
									# It's more optimized to move all timesteps to correct device beforehand
									snake_case_     =			self.scheduler.timesteps.to(self.device							)

									# scale the initial noise by the standard deviation required by the scheduler
									snake_case_     =			latents * self.scheduler.init_noise_sigma

									# 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]
									snake_case_     =			'''eta''' in set(inspect.signature(self.scheduler.step							).parameters.keys()							)
									snake_case_     =			{}
									if accepts_eta:
															snake_case_     =			eta

									# check if the scheduler accepts generator
									snake_case_     =			'''generator''' in set(inspect.signature(self.scheduler.step							).parameters.keys()							)
									if accepts_generator:
															snake_case_     =			generator

									for i, t in enumerate(self.progress_bar(_UpperCamelCase							)							):
															# expand the latents if we are doing classifier free guidance
															snake_case_     =			torch.cat([latents] * 2							) if do_classifier_free_guidance else latents
															snake_case_     =			self.scheduler.scale_model_input(_UpperCamelCase							,     _UpperCamelCase							)

															# predict the noise residual
															snake_case_     =			self.unet(_UpperCamelCase							,     _UpperCamelCase							,     encoder_hidden_states=_UpperCamelCase							).sample

															# perform classifier free guidance
															if do_classifier_free_guidance:
																					snake_case_,					snake_case_     =			noise_pred.chunk(2							)
																					snake_case_     =			noise_pred_uncond + guidance_scale * (noise_pred_text - noise_pred_uncond)

															# perform clip guidance
															if clip_guidance_scale > 0:
																					snake_case_     =			(
																					    text_embeddings.chunk(2							)[1] if do_classifier_free_guidance else text_embeddings
																					)
																					snake_case_,					snake_case_     =			self.cond_fn(
																					    _UpperCamelCase							,     _UpperCamelCase							,     _UpperCamelCase							,     _UpperCamelCase							,     _UpperCamelCase							,     _UpperCamelCase							,     _UpperCamelCase							,     _UpperCamelCase							,     _UpperCamelCase							,     )

															# compute the previous noisy sample x_t -> x_t-1
															snake_case_     =			self.scheduler.step(_UpperCamelCase							,     _UpperCamelCase							,     _UpperCamelCase							,     **_UpperCamelCase							).prev_sample

									# scale and decode the image latents with vae
									snake_case_     =			1 / self.vae.config.scaling_factor * latents
									snake_case_     =			self.vae.decode(_UpperCamelCase							).sample

									snake_case_     =			(image / 2 + 0.5).clamp(0							,     1							)
									snake_case_     =			image.cpu().permute(0							,     2							,     3							,     1							).numpy()

									if output_type == "pil":
															snake_case_     =			self.numpy_to_pil(_UpperCamelCase							)

									if not return_dict:
															return (image, None)

									return StableDiffusionPipelineOutput(images=_UpperCamelCase							,     nsfw_content_detected=_UpperCamelCase							)