






"""simple docstring"""



class  _UpperCAmelCase	:





					class  _UpperCAmelCase	:
										SCREAMING_SNAKE_CASE_		:    List[str]							   =       "_prev", "_data", "_next"




										def __init__(    self					:						Tuple   ,						A					:						Union[str, Any]   ,						A					:						Dict   ,						A					:						int       )  ->  str:
												lowercase_			:			str								=       link_p
												lowercase_			:			Optional[int]								=       element
												lowercase_			:			str								=       link_n






										def   A  (    self					:						List[str]       )  ->  Any:
												return (
												    F''' Prev -> {self._prev is not None}, Next -> {self._next is not None}'''
												)




					def __init__(    self					:						Any       )  ->  List[Any]:
							lowercase_			:			Optional[int]								=       self._Node(A   ,						A   ,						A       )
							lowercase_			:			Dict								=       self._Node(A   ,						A   ,						A       )
							lowercase_			:			Dict								=       self._trailer
							lowercase_			:			Dict								=       self._header
							lowercase_			:			Optional[int]								=       0




					def __len__(    self					:						int       )  ->  Dict:
							return self._size




					def   A  (    self					:						Tuple       )  ->  int:
							return self.__len__() == 0




					def   A  (    self					:						str   ,						A					:						Any   ,						A					:						Any   ,						A					:						str       )  ->  Any:
							# Create new_node by setting it's prev.link -> header
							# setting it's next.link -> trailer
							lowercase_			:			Optional[int]								=       self._Node(A   ,						A   ,						A       )
							lowercase_			:			List[Any]								=       new_node
							lowercase_			:			Optional[int]								=       new_node
							self._size += 1
							return self






					def   A  (    self					:						Optional[int]   ,						A					:						str       )  ->  Optional[int]:
							lowercase_			:			List[Any]								=       node._prev
							lowercase_			:			Any								=       node._next

							lowercase_			:			List[Any]								=       successor
							lowercase_			:			str								=       predecessor
							self._size -= 1
							lowercase_			:			str								=       node._data
							lowercase_			:			Optional[int]								=       None
							del node
							return temp





class  _UpperCAmelCase	(			_DoublyLinkedBase							):




					def   A  (    self					:						List[str]       )  ->  str:
							if self.is_empty():
									raise Exception('''List is empty'''       )
							return self._header._next._data




					def   A  (    self					:						int       )  ->  Any:
							if self.is_empty():
									raise Exception('''List is empty'''       )
							return self._trailer._prev._data




					def   A  (    self					:						Optional[int]   ,						A					:						List[str]       )  ->  Dict:
							return self._insert(self._header   ,						A   ,						self._header._next       )




					def   A  (    self					:						Any   ,						A					:						Optional[int]       )  ->  str:
							return self._insert(self._trailer._prev   ,						A   ,						self._trailer       )




					def   A  (    self					:						Dict       )  ->  int:
							if self.is_empty():
									raise IndexError('''remove_first from empty list'''       )
							return self._delete(self._header._next       )






					def   A  (    self					:						Dict       )  ->  Optional[Any]:
							if self.is_empty():
									raise IndexError('''remove_first from empty list'''       )
							return self._delete(self._trailer._prev       )











"""simple docstring"""



from typing import Callable, List, Optional, Union

import torch

from ...models import UNetaDModel
from ...schedulers import CMStochasticIterativeScheduler
from ...utils import (
    is_accelerate_available,
    is_accelerate_version,
    logging,
    randn_tensor,
    replace_example_docstring,
)
from ..pipeline_utils import DiffusionPipeline, ImagePipelineOutput


__A		:	Union[str, Any]      =		logging.get_logger(__name__)  # pylint: disable=invalid-name


__A		:	str      =		'''
    Examples:
        ```py
        >>> import torch

        >>> from diffusers import ConsistencyModelPipeline

        >>> device = "cuda"
        >>> # Load the cd_imagenet64_l2 checkpoint.
        >>> model_id_or_path = "openai/diffusers-cd_imagenet64_l2"
        >>> pipe = ConsistencyModelPipeline.from_pretrained(model_id_or_path, torch_dtype=torch.float16)
        >>> pipe.to(device)

        >>> # Onestep Sampling
        >>> image = pipe(num_inference_steps=1).images[0]
        >>> image.save("cd_imagenet64_l2_onestep_sample.png")

        >>> # Onestep sampling, class-conditional image generation
        >>> # ImageNet-64 class label 145 corresponds to king penguins
        >>> image = pipe(num_inference_steps=1, class_labels=145).images[0]
        >>> image.save("cd_imagenet64_l2_onestep_sample_penguin.png")

        >>> # Multistep sampling, class-conditional image generation
        >>> # Timesteps can be explicitly specified; the particular timesteps below are from the original Github repo:
        >>> # https://github.com/openai/consistency_models/blob/main/scripts/launch.sh#L77
        >>> image = pipe(num_inference_steps=None, timesteps=[22, 0], class_labels=145).images[0]
        >>> image.save("cd_imagenet64_l2_multistep_sample_penguin.png")
        ```
'''





class  _UpperCAmelCase	(			_A							):




					def __init__(    self					:						Union[str, Any]   ,						A					:						UNetaDModel   ,						A					:						CMStochasticIterativeScheduler       )  ->  None:
							super().__init__()

							self.register_modules(
							    unet=A   ,						scheduler=A   ,						)

							lowercase_			:			Any								=       None




					def   A  (    self					:						Tuple   ,						A					:						Union[str, Any]=0       )  ->  Optional[Any]:
							if is_accelerate_available() and is_accelerate_version('''>='''   ,						'''0.14.0'''       ):
									from accelerate import cpu_offload
							else:
									raise ImportError('''`enable_sequential_cpu_offload` requires `accelerate v0.14.0` or higher'''       )

							lowercase_			:			Any								=       torch.device(F'''cuda:{gpu_id}'''       )

							if self.device.type != "cpu":
									self.to('''cpu'''   ,						silence_dtype_warnings=A       )
									torch.cuda.empty_cache()  # otherwise we don't see the memory savings (but they probably exist)

							for cpu_offloaded_model in [self.unet]:
									cpu_offload(A   ,						A       )

							if self.safety_checker is not None:
									cpu_offload(self.safety_checker   ,						execution_device=A   ,						offload_buffers=A       )




					def   A  (    self					:						List[Any]   ,						A					:						Optional[Any]=0       )  ->  List[Any]:
							if is_accelerate_available() and is_accelerate_version('''>='''   ,						'''0.17.0.dev0'''       ):
									from accelerate import cpu_offload_with_hook
							else:
									raise ImportError('''`enable_model_cpu_offload` requires `accelerate v0.17.0` or higher.'''       )

							lowercase_			:			List[str]								=       torch.device(F'''cuda:{gpu_id}'''       )

							if self.device.type != "cpu":
									self.to('''cpu'''   ,						silence_dtype_warnings=A       )
									torch.cuda.empty_cache()  # otherwise we don't see the memory savings (but they probably exist)

							lowercase_			:			Union[str, Any]								=       None
							for cpu_offloaded_model in [self.unet]:
									lowercase_	, lowercase_			:			Optional[int]								=       cpu_offload_with_hook(A   ,						A   ,						prev_module_hook=A       )

							if self.safety_checker is not None:
									lowercase_	, lowercase_			:			Any								=       cpu_offload_with_hook(self.safety_checker   ,						A   ,						prev_module_hook=A       )

							# We'll offload the last model manually.
							lowercase_			:			str								=       hook




					@property
					# Copied from diffusers.pipelines.stable_diffusion.pipeline_stable_diffusion.StableDiffusionPipeline._execution_device
					def   A  (    self					:						Any       )  ->  List[str]:
							if not hasattr(self.unet   ,						'''_hf_hook'''       ):
									return self.device
							for module in self.unet.modules():
									if (
									    hasattr(A   ,						'''_hf_hook'''       )
									    and hasattr(module._hf_hook   ,						'''execution_device'''       )
									    and module._hf_hook.execution_device is not None
									):
											return torch.device(module._hf_hook.execution_device       )
							return self.device




					def   A  (    self					:						List[str]   ,						A					:						int   ,						A					:						Union[str, Any]   ,						A					:						List[str]   ,						A					:						str   ,						A					:						int   ,						A					:						List[Any]   ,						A					:						Optional[Any]   ,						A					:						Optional[Any]=None       )  ->  Tuple:
							lowercase_			:			List[Any]								=       (batch_size, num_channels, height, width)
							if isinstance(A   ,						A       ) and len(A       ) != batch_size:
									raise ValueError(
									    F'''You have passed a list of generators of length {len(A       )}, but requested an effective batch'''
									    F''' size of {batch_size}. Make sure the batch size matches the length of the generators.'''       )

							if latents is None:
									lowercase_			:			Dict								=       randn_tensor(A   ,						generator=A   ,						device=A   ,						dtype=A       )
							else:
									lowercase_			:			Tuple								=       latents.to(device=A   ,						dtype=A       )

							# scale the initial noise by the standard deviation required by the scheduler
							lowercase_			:			List[str]								=       latents * self.scheduler.init_noise_sigma
							return latents




					def   A  (    self					:						Tuple   ,						A					:						torch.FloatTensor   ,						A					:						str = "pil"       )  ->  Optional[int]:
							if output_type not in ["pt", "np", "pil"]:
									raise ValueError(
									    F'''output_type={output_type} is not supported. Make sure to choose one of [\'pt\', \'np\', or \'pil\']'''       )

							# Equivalent to diffusers.VaeImageProcessor.denormalize
							lowercase_			:			Dict								=       (sample / 2 + 0.5).clamp(0   ,						1       )
							if output_type == "pt":
									return sample

							# Equivalent to diffusers.VaeImageProcessor.pt_to_numpy
							lowercase_			:			List[str]								=       sample.cpu().permute(0   ,						2   ,						3   ,						1       ).numpy()
							if output_type == "np":
									return sample

							# Output_type must be 'pil'
							lowercase_			:			List[Any]								=       self.numpy_to_pil(A       )
							return sample




					def   A  (    self					:						Optional[int]   ,						A					:						Any   ,						A					:						Union[str, Any]   ,						A					:						Optional[int]=None       )  ->  List[Any]:
							if self.unet.config.num_class_embeds is not None:
									if isinstance(A   ,						A       ):
											lowercase_			:			Optional[int]								=       torch.tensor(A   ,						dtype=torch.int       )
									elif isinstance(A   ,						A       ):
											assert batch_size == 1, "Batch size must be 1 if classes is an int"
											lowercase_			:			int								=       torch.tensor([class_labels]   ,						dtype=torch.int       )
									elif class_labels is None:
											# Randomly generate batch_size class labels
											# TODO: should use generator here? int analogue of randn_tensor is not exposed in ...utils
											lowercase_			:			Any								=       torch.randint(0   ,						self.unet.config.num_class_embeds   ,						size=(batch_size,)       )
									lowercase_			:			List[str]								=       class_labels.to(A       )
							else:
									lowercase_			:			Union[str, Any]								=       None
							return class_labels




					def   A  (    self					:						Dict   ,						A					:						Union[str, Any]   ,						A					:						Any   ,						A					:						Optional[int]   ,						A					:						Union[str, Any]   ,						A					:						Any   ,						A					:						int       )  ->  Union[str, Any]:
							if num_inference_steps is None and timesteps is None:
									raise ValueError('''Exactly one of `num_inference_steps` or `timesteps` must be supplied.'''       )

							if num_inference_steps is not None and timesteps is not None:
									logger.warning(
									    F'''Both `num_inference_steps`: {num_inference_steps} and `timesteps`: {timesteps} are supplied;'''
									    ''' `timesteps` will be used over `num_inference_steps`.'''       )

							if latents is not None:
									lowercase_			:			List[Any]								=       (batch_size, 3, img_size, img_size)
									if latents.shape != expected_shape:
											raise ValueError(F'''The shape of latents is {latents.shape} but is expected to be {expected_shape}.'''       )

							if (callback_steps is None) or (
							    callback_steps is not None and (not isinstance(A   ,						A       ) or callback_steps <= 0)
							):
									raise ValueError(
									    F'''`callback_steps` has to be a positive integer but is {callback_steps} of type'''
									    F''' {type(A       )}.'''       )






					@torch.no_grad()
					@replace_example_docstring(A       )
					def __call__(    self					:						Optional[Any]   ,						A					:						int = 1   ,						A					:						Optional[Union[torch.Tensor, List[int], int]] = None   ,						A					:						int = 1   ,						A					:						List[int] = None   ,						A					:						Optional[Union[torch.Generator, List[torch.Generator]]] = None   ,						A					:						Optional[torch.FloatTensor] = None   ,						A					:						Optional[str] = "pil"   ,						A					:						bool = True   ,						A					:						Optional[Callable[[int, int, torch.FloatTensor], None]] = None   ,						A					:						int = 1   ,						)  ->  Tuple:
							lowercase_			:			Dict								=       self.unet.config.sample_size
							lowercase_			:			Union[str, Any]								=       self._execution_device

							# 1. Check inputs
							self.check_inputs(A   ,						A   ,						A   ,						A   ,						A   ,						A       )

							# 2. Prepare image latents
							# Sample image latents x_0 ~ N(0, sigma_0^2 * I)
							lowercase_			:			Optional[int]								=       self.prepare_latents(
							    batch_size=A   ,						num_channels=self.unet.config.in_channels   ,						height=A   ,						width=A   ,						dtype=self.unet.dtype   ,						device=A   ,						generator=A   ,						latents=A   ,						)

							# 3. Handle class_labels for class-conditional models
							lowercase_			:			List[str]								=       self.prepare_class_labels(A   ,						A   ,						class_labels=A       )

							# 4. Prepare timesteps
							if timesteps is not None:
									self.scheduler.set_timesteps(timesteps=A   ,						device=A       )
									lowercase_			:			Optional[int]								=       self.scheduler.timesteps
									lowercase_			:			List[Any]								=       len(A       )
							else:
									self.scheduler.set_timesteps(A       )
									lowercase_			:			Any								=       self.scheduler.timesteps

							# 5. Denoising loop
							# Multistep sampling: implements Algorithm 1 in the paper
							with self.progress_bar(total=A       ) as progress_bar:
									for i, t in enumerate(A       ):
											lowercase_			:			List[str]								=       self.scheduler.scale_model_input(A   ,						A       )
											lowercase_			:			Optional[Any]								=       self.unet(A   ,						A   ,						class_labels=A   ,						return_dict=A       )[0]

											lowercase_			:			Tuple								=       self.scheduler.step(A   ,						A   ,						A   ,						generator=A       )[0]

											# call the callback, if provided
											progress_bar.update()
											if callback is not None and i % callback_steps == 0:
													callback(A   ,						A   ,						A       )

        # 6. Post-process image sample
							lowercase_			:			Union[str, Any]								=       self.postprocess_image(A   ,						output_type=A       )

							# Offload last model to CPU
							if hasattr(self   ,						'''final_offload_hook'''       ) and self.final_offload_hook is not None:
									self.final_offload_hook.offload()

							if not return_dict:
									return (image,)

							return ImagePipelineOutput(images=A       )



