343 lines
12 KiB
Python
343 lines
12 KiB
Python
# Copyright 2024 The HuggingFace Team. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from typing import Any, Dict, Optional, Tuple
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import torch
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from diffusers.utils import is_torch_version, logging
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from diffusers.utils.torch_utils import apply_freeu
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logger = logging.get_logger(__name__) # pylint: disable=invalid-name
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def CrossAttnDownBlock2D_forward(
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self,
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hidden_states: torch.FloatTensor,
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temb: Optional[torch.FloatTensor] = None,
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encoder_hidden_states: Optional[torch.FloatTensor] = None,
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attention_mask: Optional[torch.FloatTensor] = None,
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cross_attention_kwargs: Optional[Dict[str, Any]] = None,
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encoder_attention_mask: Optional[torch.FloatTensor] = None,
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additional_residuals: Optional[torch.FloatTensor] = None,
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down_block_add_samples: Optional[torch.FloatTensor] = None,
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) -> Tuple[torch.FloatTensor, Tuple[torch.FloatTensor, ...]]:
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output_states = ()
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lora_scale = (
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cross_attention_kwargs.get("scale", 1.0)
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if cross_attention_kwargs is not None
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else 1.0
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)
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blocks = list(zip(self.resnets, self.attentions))
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for i, (resnet, attn) in enumerate(blocks):
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if self.training and self.gradient_checkpointing:
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def create_custom_forward(module, return_dict=None):
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def custom_forward(*inputs):
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if return_dict is not None:
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return module(*inputs, return_dict=return_dict)
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else:
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return module(*inputs)
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return custom_forward
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ckpt_kwargs: Dict[str, Any] = (
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{"use_reentrant": False} if is_torch_version(">=", "1.11.0") else {}
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)
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hidden_states = torch.utils.checkpoint.checkpoint(
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create_custom_forward(resnet),
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hidden_states,
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temb,
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**ckpt_kwargs,
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)
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hidden_states = attn(
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hidden_states,
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encoder_hidden_states=encoder_hidden_states,
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cross_attention_kwargs=cross_attention_kwargs,
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attention_mask=attention_mask,
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encoder_attention_mask=encoder_attention_mask,
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return_dict=False,
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)[0]
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else:
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hidden_states = resnet(hidden_states, temb, scale=lora_scale)
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hidden_states = attn(
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hidden_states,
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encoder_hidden_states=encoder_hidden_states,
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cross_attention_kwargs=cross_attention_kwargs,
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attention_mask=attention_mask,
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encoder_attention_mask=encoder_attention_mask,
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return_dict=False,
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)[0]
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# apply additional residuals to the output of the last pair of resnet and attention blocks
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if i == len(blocks) - 1 and additional_residuals is not None:
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hidden_states = hidden_states + additional_residuals
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if down_block_add_samples is not None:
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hidden_states = hidden_states + down_block_add_samples.pop(0)
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output_states = output_states + (hidden_states,)
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if self.downsamplers is not None:
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for downsampler in self.downsamplers:
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hidden_states = downsampler(hidden_states, scale=lora_scale)
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if down_block_add_samples is not None:
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hidden_states = hidden_states + down_block_add_samples.pop(
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0
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) # todo: add before or after
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output_states = output_states + (hidden_states,)
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return hidden_states, output_states
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def DownBlock2D_forward(
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self,
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hidden_states: torch.FloatTensor,
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temb: Optional[torch.FloatTensor] = None,
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scale: float = 1.0,
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down_block_add_samples: Optional[torch.FloatTensor] = None,
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) -> Tuple[torch.FloatTensor, Tuple[torch.FloatTensor, ...]]:
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output_states = ()
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for resnet in self.resnets:
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if self.training and self.gradient_checkpointing:
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def create_custom_forward(module):
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def custom_forward(*inputs):
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return module(*inputs)
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return custom_forward
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if is_torch_version(">=", "1.11.0"):
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hidden_states = torch.utils.checkpoint.checkpoint(
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create_custom_forward(resnet),
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hidden_states,
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temb,
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use_reentrant=False,
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)
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else:
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hidden_states = torch.utils.checkpoint.checkpoint(
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create_custom_forward(resnet), hidden_states, temb
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)
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else:
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hidden_states = resnet(hidden_states, temb, scale=scale)
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if down_block_add_samples is not None:
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hidden_states = hidden_states + down_block_add_samples.pop(0)
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output_states = output_states + (hidden_states,)
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if self.downsamplers is not None:
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for downsampler in self.downsamplers:
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hidden_states = downsampler(hidden_states, scale=scale)
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if down_block_add_samples is not None:
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hidden_states = hidden_states + down_block_add_samples.pop(
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0
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) # todo: add before or after
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output_states = output_states + (hidden_states,)
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return hidden_states, output_states
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def CrossAttnUpBlock2D_forward(
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self,
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hidden_states: torch.FloatTensor,
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res_hidden_states_tuple: Tuple[torch.FloatTensor, ...],
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temb: Optional[torch.FloatTensor] = None,
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encoder_hidden_states: Optional[torch.FloatTensor] = None,
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cross_attention_kwargs: Optional[Dict[str, Any]] = None,
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upsample_size: Optional[int] = None,
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attention_mask: Optional[torch.FloatTensor] = None,
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encoder_attention_mask: Optional[torch.FloatTensor] = None,
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return_res_samples: Optional[bool] = False,
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up_block_add_samples: Optional[torch.FloatTensor] = None,
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) -> torch.FloatTensor:
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lora_scale = (
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cross_attention_kwargs.get("scale", 1.0)
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if cross_attention_kwargs is not None
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else 1.0
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)
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is_freeu_enabled = (
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getattr(self, "s1", None)
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and getattr(self, "s2", None)
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and getattr(self, "b1", None)
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and getattr(self, "b2", None)
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)
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if return_res_samples:
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output_states = ()
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for resnet, attn in zip(self.resnets, self.attentions):
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# pop res hidden states
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res_hidden_states = res_hidden_states_tuple[-1]
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res_hidden_states_tuple = res_hidden_states_tuple[:-1]
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# FreeU: Only operate on the first two stages
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if is_freeu_enabled:
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hidden_states, res_hidden_states = apply_freeu(
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self.resolution_idx,
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hidden_states,
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res_hidden_states,
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s1=self.s1,
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s2=self.s2,
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b1=self.b1,
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b2=self.b2,
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)
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hidden_states = torch.cat([hidden_states, res_hidden_states], dim=1)
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if self.training and self.gradient_checkpointing:
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def create_custom_forward(module, return_dict=None):
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def custom_forward(*inputs):
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if return_dict is not None:
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return module(*inputs, return_dict=return_dict)
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else:
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return module(*inputs)
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return custom_forward
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ckpt_kwargs: Dict[str, Any] = (
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{"use_reentrant": False} if is_torch_version(">=", "1.11.0") else {}
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)
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hidden_states = torch.utils.checkpoint.checkpoint(
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create_custom_forward(resnet),
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hidden_states,
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temb,
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**ckpt_kwargs,
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)
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hidden_states = attn(
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hidden_states,
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encoder_hidden_states=encoder_hidden_states,
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cross_attention_kwargs=cross_attention_kwargs,
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attention_mask=attention_mask,
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encoder_attention_mask=encoder_attention_mask,
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return_dict=False,
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)[0]
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else:
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hidden_states = resnet(hidden_states, temb, scale=lora_scale)
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hidden_states = attn(
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hidden_states,
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encoder_hidden_states=encoder_hidden_states,
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cross_attention_kwargs=cross_attention_kwargs,
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attention_mask=attention_mask,
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encoder_attention_mask=encoder_attention_mask,
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return_dict=False,
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)[0]
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if return_res_samples:
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output_states = output_states + (hidden_states,)
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if up_block_add_samples is not None:
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hidden_states = hidden_states + up_block_add_samples.pop(0)
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if self.upsamplers is not None:
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for upsampler in self.upsamplers:
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hidden_states = upsampler(hidden_states, upsample_size, scale=lora_scale)
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if return_res_samples:
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output_states = output_states + (hidden_states,)
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if up_block_add_samples is not None:
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hidden_states = hidden_states + up_block_add_samples.pop(0)
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if return_res_samples:
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return hidden_states, output_states
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else:
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return hidden_states
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def UpBlock2D_forward(
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self,
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hidden_states: torch.FloatTensor,
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res_hidden_states_tuple: Tuple[torch.FloatTensor, ...],
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temb: Optional[torch.FloatTensor] = None,
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upsample_size: Optional[int] = None,
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scale: float = 1.0,
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return_res_samples: Optional[bool] = False,
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up_block_add_samples: Optional[torch.FloatTensor] = None,
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) -> torch.FloatTensor:
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is_freeu_enabled = (
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getattr(self, "s1", None)
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and getattr(self, "s2", None)
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and getattr(self, "b1", None)
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and getattr(self, "b2", None)
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)
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if return_res_samples:
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output_states = ()
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for resnet in self.resnets:
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# pop res hidden states
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res_hidden_states = res_hidden_states_tuple[-1]
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res_hidden_states_tuple = res_hidden_states_tuple[:-1]
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# FreeU: Only operate on the first two stages
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if is_freeu_enabled:
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hidden_states, res_hidden_states = apply_freeu(
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self.resolution_idx,
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hidden_states,
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res_hidden_states,
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s1=self.s1,
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s2=self.s2,
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b1=self.b1,
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b2=self.b2,
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)
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hidden_states = torch.cat([hidden_states, res_hidden_states], dim=1)
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if self.training and self.gradient_checkpointing:
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def create_custom_forward(module):
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def custom_forward(*inputs):
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return module(*inputs)
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return custom_forward
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if is_torch_version(">=", "1.11.0"):
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hidden_states = torch.utils.checkpoint.checkpoint(
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create_custom_forward(resnet),
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hidden_states,
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temb,
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use_reentrant=False,
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)
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else:
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hidden_states = torch.utils.checkpoint.checkpoint(
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create_custom_forward(resnet), hidden_states, temb
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)
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else:
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hidden_states = resnet(hidden_states, temb, scale=scale)
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if return_res_samples:
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output_states = output_states + (hidden_states,)
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if up_block_add_samples is not None:
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hidden_states = hidden_states + up_block_add_samples.pop(
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0
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) # todo: add before or after
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if self.upsamplers is not None:
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for upsampler in self.upsamplers:
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hidden_states = upsampler(hidden_states, upsample_size, scale=scale)
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if return_res_samples:
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output_states = output_states + (hidden_states,)
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if up_block_add_samples is not None:
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hidden_states = hidden_states + up_block_add_samples.pop(
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0
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) # todo: add before or after
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if return_res_samples:
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return hidden_states, output_states
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else:
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return hidden_states
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