

"""simple docstring"""






from dataclasses import dataclass
from typing import List, Optional, Tuple, Union

import numpy as np
import torch

from ..configuration_utils import ConfigMixin, register_to_config
from ..utils import BaseOutput, logging, randn_tensor
from .scheduling_utils import SchedulerMixin


__lowerCAmelCase				      =   logging.get_logger(__name__)  # pylint: disable=invalid-name
@dataclass
class 	_lowerCAmelCase    (      __snake_case       ):
							__lowerCAmelCase					:    torch.FloatTensor




class 	_lowerCAmelCase    (      __snake_case       ,       __snake_case       ):
							__lowerCAmelCase					:    int     =  1

							@register_to_config
							def __init__( self       :    Union[str, Any] ,		a       :    int = 40 ,		a       :    float = 0.002 ,		a       :    float = 80.0 ,		a       :    float = 0.5 ,		a       :    float = 1.0 ,		a       :    float = 7.0 ,		a       :    bool = True ,		)   ->    List[Any]:

									"""simple docstring"""
									# standard deviation of the initial noise distribution
									lowercase										=							sigma_max

									lowercase										=							np.linspace(0 ,		1 ,		a    )
									lowercase										=							self._convert_to_karras(a    )
									lowercase										=							self.sigma_to_t(a    )

									# setable values
									lowercase										=							None
									lowercase										=							torch.from_numpy(a    )
									lowercase										=							torch.from_numpy(a    )
									lowercase										=							False
									lowercase										=							False

							def 					_lowerCAmelCase  ( self       :    Tuple ,		a       :    Optional[int] ,		a       :    str=None    )   ->    Any:

									"""simple docstring"""
									if schedule_timesteps is None:
											lowercase										=							self.timesteps

									lowercase										=							(schedule_timesteps == timestep).nonzero()
									return indices.item()

							def 					_lowerCAmelCase  ( self       :    Tuple ,		a       :    torch.FloatTensor ,		a       :    Union[float, torch.FloatTensor]    )   ->    torch.FloatTensor:

									"""simple docstring"""
									# Get sigma corresponding to timestep
									if isinstance(a ,		torch.Tensor    ):
											lowercase										=							timestep.to(self.timesteps.device    )
									lowercase										=							self.index_for_timestep(a    )
									lowercase										=							self.sigmas[step_idx]

									lowercase										=							sample / ((sigma**2 + self.config.sigma_data**2) ** 0.5)

									lowercase										=							True
									return sample

							def 					_lowerCAmelCase  ( self       :    Optional[Any] ,		a       :    Union[float, np.ndarray]    )   ->    str:

									"""simple docstring"""
									if not isinstance(a ,		np.ndarray    ):
											lowercase										=							np.array(a ,		dtype=np.floataa    )

									lowercase										=							1000 * 0.25 * np.log(sigmas + 1E-44    )

									return timesteps

							def 					_lowerCAmelCase  ( self       :    Optional[Any] ,		a       :    Optional[int] = None ,		a       :    Union[str, torch.device] = None ,		a       :    Optional[List[int]] = None ,		)   ->    Dict:

									"""simple docstring"""
									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:
											raise ValueError('''Can only pass one of `num_inference_steps` or `timesteps`.'''    )

									# Follow DDPMScheduler custom timesteps logic
									if timesteps is not None:
											for i in range(1 ,		len(a    )    ):
													if timesteps[i] >= timesteps[i - 1]:
															raise ValueError('''`timesteps` must be in descending order.'''    )

											if timesteps[0] >= self.config.num_train_timesteps:
													raise ValueError(
													    f"""`timesteps` must start before `self.config.train_timesteps`:"""
													    f""" {self.config.num_train_timesteps}."""    )

											lowercase										=							np.array(a ,		dtype=np.intaa    )
											lowercase										=							True
									else:
											if num_inference_steps > self.config.num_train_timesteps:
													raise ValueError(
													    f"""`num_inference_steps`: {num_inference_steps} cannot be larger than `self.config.train_timesteps`:"""
													    f""" {self.config.num_train_timesteps} as the unet model trained with this scheduler can only handle"""
													    f""" maximal {self.config.num_train_timesteps} timesteps."""    )

											lowercase										=							num_inference_steps

											lowercase										=							self.config.num_train_timesteps // self.num_inference_steps
											lowercase										=							(np.arange(0 ,		a    ) * step_ratio).round()[::-1].copy().astype(np.intaa    )
											lowercase										=							False

									# Map timesteps to Karras sigmas directly for multistep sampling
									# See https://github.com/openai/consistency_models/blob/main/cm/karras_diffusion.py#L675
									lowercase										=							self.config.num_train_timesteps
									lowercase										=							timesteps[::-1].copy()
									lowercase										=							ramp / (num_train_timesteps - 1)
									lowercase										=							self._convert_to_karras(a    )
									lowercase										=							self.sigma_to_t(a    )

									lowercase										=							np.concatenate([sigmas, [self.sigma_min]]    ).astype(np.floataa    )
									lowercase										=							torch.from_numpy(a    ).to(device=a    )

									if str(a    ).startswith('''mps'''    ):
											# mps does not support float64
											lowercase										=							torch.from_numpy(a    ).to(a ,		dtype=torch.floataa    )
									else:
											lowercase										=							torch.from_numpy(a    ).to(device=a    )

							def 					_lowerCAmelCase  ( self       :    Tuple ,		a       :    int    )   ->    List[Any]:

									"""simple docstring"""
									lowercase										=							self.config.sigma_min
									lowercase										=							self.config.sigma_max

									lowercase										=							self.config.rho
									lowercase										=							sigma_min ** (1 / rho)
									lowercase										=							sigma_max ** (1 / rho)
									lowercase										=							(max_inv_rho + ramp * (min_inv_rho - max_inv_rho)) ** rho
									return sigmas

							def 					_lowerCAmelCase  ( self       :    Any ,		a       :    str    )   ->    int:

									"""simple docstring"""
									lowercase										=							self.config.sigma_data

									lowercase										=							sigma_data**2 / (sigma**2 + sigma_data**2)
									lowercase										=							sigma * sigma_data / (sigma**2 + sigma_data**2) ** 0.5
									return c_skip, c_out

							def 					_lowerCAmelCase  ( self       :    Optional[Any] ,		a       :    Any    )   ->    Optional[int]:

									"""simple docstring"""
									lowercase										=							self.config.sigma_min
									lowercase										=							self.config.sigma_data

									lowercase										=							sigma_data**2 / ((sigma - sigma_min) ** 2 + sigma_data**2)
									lowercase										=							(sigma - sigma_min) * sigma_data / (sigma**2 + sigma_data**2) ** 0.5
									return c_skip, c_out

							def 					_lowerCAmelCase  ( self       :    Dict ,		a       :    torch.FloatTensor ,		a       :    Union[float, torch.FloatTensor] ,		a       :    torch.FloatTensor ,		a       :    Optional[torch.Generator] = None ,		a       :    bool = True ,		)   ->    Union[CMStochasticIterativeSchedulerOutput, Tuple]:

									"""simple docstring"""

									if (
									    isinstance(a ,		a    )
									    or isinstance(a ,		torch.IntTensor    )
									    or isinstance(a ,		torch.LongTensor    )
									):
											raise ValueError(
											    (
											        '''Passing integer indices (e.g. from `enumerate(timesteps)`) as timesteps to'''
											        f""" `{self.__class__}.step()` is not supported. Make sure to pass"""
											        ''' one of the `scheduler.timesteps` as a timestep.'''
											    ) ,		)

									if not self.is_scale_input_called:
											logger.warning(
											    '''The `scale_model_input` function should be called before `step` to ensure correct denoising. '''
											    '''See `StableDiffusionPipeline` for a usage example.'''    )

									if isinstance(a ,		torch.Tensor    ):
											lowercase										=							timestep.to(self.timesteps.device    )

									lowercase										=							self.config.sigma_min
									lowercase										=							self.config.sigma_max

									lowercase										=							self.index_for_timestep(a    )

									# sigma_next corresponds to next_t in original implementation
									lowercase										=							self.sigmas[step_index]
									if step_index + 1 < self.config.num_train_timesteps:
											lowercase										=							self.sigmas[step_index + 1]
									else:
											# Set sigma_next to sigma_min
											lowercase										=							self.sigmas[-1]

									# Get scalings for boundary conditions
									lowercase					,  lowercase										=							self.get_scalings_for_boundary_condition(a    )

									# 1. Denoise model output using boundary conditions
									lowercase										=							c_out * model_output + c_skip * sample
									if self.config.clip_denoised:
											lowercase										=							denoised.clamp(-1 ,		1    )

									# 2. Sample z ~ N(0, s_noise^2 * I)
									# Noise is not used for onestep sampling.
									if len(self.timesteps    ) > 1:
											lowercase										=							randn_tensor(
											    model_output.shape ,		dtype=model_output.dtype ,		device=model_output.device ,		generator=a    )
									else:
											lowercase										=							torch.zeros_like(a    )
									lowercase										=							noise * self.config.s_noise

									lowercase										=							sigma_next.clamp(min=a ,		max=a    )

									# 3. Return noisy sample
									# tau = sigma_hat, eps = sigma_min
									lowercase										=							denoised + z * (sigma_hat**2 - sigma_min**2) ** 0.5

									if not return_dict:
											return (prev_sample,)

									return CMStochasticIterativeSchedulerOutput(prev_sample=a    )

							def 					_lowerCAmelCase  ( self       :    Any ,		a       :    torch.FloatTensor ,		a       :    torch.FloatTensor ,		a       :    torch.FloatTensor ,		)   ->    torch.FloatTensor:

									"""simple docstring"""
									# Make sure sigmas and timesteps have the same device and dtype as original_samples
									lowercase										=							self.sigmas.to(device=original_samples.device ,		dtype=original_samples.dtype    )
									if original_samples.device.type == "mps" and torch.is_floating_point(a    ):
											# mps does not support float64
											lowercase										=							self.timesteps.to(original_samples.device ,		dtype=torch.floataa    )
											lowercase										=							timesteps.to(original_samples.device ,		dtype=torch.floataa    )
									else:
											lowercase										=							self.timesteps.to(original_samples.device    )
											lowercase										=							timesteps.to(original_samples.device    )

									lowercase										=							[(schedule_timesteps == t).nonzero().item() for t in timesteps]

									lowercase										=							sigmas[step_indices].flatten()
									while len(sigma.shape    ) < len(original_samples.shape    ):
											lowercase										=							sigma.unsqueeze(-1    )

									lowercase										=							original_samples + noise * sigma
									return noisy_samples

							def __len__( self       :    Union[str, Any]    )   ->    Any:

									"""simple docstring"""
									return self.config.num_train_timesteps


"""simple docstring"""






from typing import TYPE_CHECKING

from ...utils import _LazyModule


__lowerCAmelCase				      =   {'''tokenization_phobert''': ['''PhobertTokenizer''']}


if TYPE_CHECKING:
							from .tokenization_phobert import PhobertTokenizer

else:
							import sys

							__lowerCAmelCase				      =   _LazyModule(__name__, globals()['''__file__'''], _import_structure, module_spec=__spec__)