| import torch |
| import torch.nn as nn |
| import torch.nn.functional as F |
|
|
| from typing import List, Tuple, Union |
| from dataclasses import dataclass |
| from diffusers.utils.outputs import BaseOutput |
| from diffusers.configuration_utils import ConfigMixin, register_to_config |
| from diffusers.models.modeling_utils import ModelMixin |
| from diffusers.models.unet_2d_blocks import get_down_block as get_down_block_default |
| from diffusers.models.resnet import Mish, Upsample2D, Downsample2D, upsample_2d, downsample_2d, partial |
| from diffusers.models.cross_attention import CrossAttention, LoRALinearLayer |
|
|
|
|
| def get_down_block( |
| down_block_type, |
| num_layers, |
| in_channels, |
| out_channels, |
| temb_channels, |
| add_downsample, |
| resnet_eps, |
| resnet_act_fn, |
| attn_num_head_channels, |
| resnet_groups=None, |
| cross_attention_dim=None, |
| downsample_padding=None, |
| dual_cross_attention=False, |
| use_linear_projection=False, |
| only_cross_attention=False, |
| upcast_attention=False, |
| resnet_time_scale_shift="default", |
| resnet_kernel_size=3, |
| ): |
| down_block_type = down_block_type[7:] if down_block_type.startswith("UNetRes") else down_block_type |
| if down_block_type == "SimpleDownEncoderBlock2D": |
| return SimpleDownEncoderBlock2D( |
| num_layers=num_layers, |
| in_channels=in_channels, |
| out_channels=out_channels, |
| add_downsample=add_downsample, |
| convnet_eps=resnet_eps, |
| convnet_act_fn=resnet_act_fn, |
| convnet_groups=resnet_groups, |
| downsample_padding=downsample_padding, |
| convnet_time_scale_shift=resnet_time_scale_shift, |
| convnet_kernel_size=resnet_kernel_size |
| ) |
| else: |
| return get_down_block_default( |
| down_block_type, |
| num_layers, |
| in_channels, |
| out_channels, |
| temb_channels, |
| add_downsample, |
| resnet_eps, |
| resnet_act_fn, |
| attn_num_head_channels, |
| resnet_groups=resnet_groups, |
| cross_attention_dim=cross_attention_dim, |
| downsample_padding=downsample_padding, |
| dual_cross_attention=dual_cross_attention, |
| use_linear_projection=use_linear_projection, |
| only_cross_attention=only_cross_attention, |
| upcast_attention=upcast_attention, |
| resnet_time_scale_shift=resnet_time_scale_shift, |
| |
| ) |
|
|
|
|
| class LoRACrossAttnProcessor(nn.Module): |
| def __init__( |
| self, |
| hidden_size, |
| cross_attention_dim=None, |
| rank=4, |
| post_add=False, |
| key_states_skipped=False, |
| value_states_skipped=False, |
| output_states_skipped=False): |
| super().__init__() |
|
|
| self.hidden_size = hidden_size |
| self.cross_attention_dim = cross_attention_dim |
| self.rank = rank |
| self.post_add = post_add |
|
|
| self.to_q_lora = LoRALinearLayer(hidden_size, hidden_size, rank) |
| if not key_states_skipped: |
| self.to_k_lora = LoRALinearLayer( |
| hidden_size if post_add else (cross_attention_dim or hidden_size), hidden_size, rank) |
| if not value_states_skipped: |
| self.to_v_lora = LoRALinearLayer( |
| hidden_size if post_add else (cross_attention_dim or hidden_size), hidden_size, rank) |
| if not output_states_skipped: |
| self.to_out_lora = LoRALinearLayer(hidden_size, hidden_size, rank) |
|
|
| self.key_states_skipped: bool = key_states_skipped |
| self.value_states_skipped: bool = value_states_skipped |
| self.output_states_skipped: bool = output_states_skipped |
|
|
| def skip_key_states(self, is_skipped: bool = True): |
| if is_skipped == False: |
| assert hasattr(self, 'to_k_lora') |
| self.key_states_skipped = is_skipped |
|
|
| def skip_value_states(self, is_skipped: bool = True): |
| if is_skipped == False: |
| assert hasattr(self, 'to_q_lora') |
| self.value_states_skipped = is_skipped |
|
|
| def skip_output_states(self, is_skipped: bool = True): |
| if is_skipped == False: |
| assert hasattr(self, 'to_out_lora') |
| self.output_states_skipped = is_skipped |
|
|
| def __call__( |
| self, attn: CrossAttention, hidden_states, encoder_hidden_states=None, attention_mask=None, scale=1.0 |
| ): |
| batch_size, sequence_length, _ = hidden_states.shape |
| attention_mask = attn.prepare_attention_mask(attention_mask, sequence_length, batch_size) |
|
|
| query = attn.to_q(hidden_states) |
| query = query + scale * self.to_q_lora(query if self.post_add else hidden_states) |
| query = attn.head_to_batch_dim(query) |
|
|
| encoder_hidden_states = encoder_hidden_states if encoder_hidden_states is not None else hidden_states |
|
|
| key = attn.to_k(encoder_hidden_states) |
| if not self.key_states_skipped: |
| key = key + scale * self.to_k_lora(key if self.post_add else encoder_hidden_states) |
| value = attn.to_v(encoder_hidden_states) |
| if not self.value_states_skipped: |
| value = value + scale * self.to_v_lora(value if self.post_add else encoder_hidden_states) |
|
|
| key = attn.head_to_batch_dim(key) |
| value = attn.head_to_batch_dim(value) |
|
|
| attention_probs = attn.get_attention_scores(query, key, attention_mask) |
| hidden_states = torch.bmm(attention_probs, value) |
| hidden_states = attn.batch_to_head_dim(hidden_states) |
|
|
| |
| out = attn.to_out[0](hidden_states) |
| if not self.output_states_skipped: |
| out = out + scale * self.to_out_lora(out if self.post_add else hidden_states) |
| hidden_states = out |
| |
| hidden_states = attn.to_out[1](hidden_states) |
|
|
| return hidden_states |
|
|
|
|
| class ControlLoRACrossAttnProcessor(LoRACrossAttnProcessor): |
| def __init__( |
| self, |
| hidden_size, |
| cross_attention_dim=None, |
| rank=4, |
| control_rank=None, |
| post_add=False, |
| concat_hidden=False, |
| control_channels=None, |
| control_self_add=True, |
| key_states_skipped=False, |
| value_states_skipped=False, |
| output_states_skipped=False, |
| **kwargs): |
| super().__init__( |
| hidden_size, |
| cross_attention_dim, |
| rank, |
| post_add=post_add, |
| key_states_skipped=key_states_skipped, |
| value_states_skipped=value_states_skipped, |
| output_states_skipped=output_states_skipped) |
|
|
| control_rank = rank if control_rank is None else control_rank |
| control_channels = hidden_size if control_channels is None else control_channels |
| self.concat_hidden = concat_hidden |
| self.control_self_add = control_self_add if control_channels is None else False |
| self.control_states: torch.Tensor = None |
|
|
| self.to_control = LoRALinearLayer( |
| control_channels + (hidden_size if concat_hidden else 0), |
| hidden_size, |
| control_rank) |
| self.pre_loras: List[LoRACrossAttnProcessor] = [] |
| self.post_loras: List[LoRACrossAttnProcessor] = [] |
|
|
| def inject_pre_lora(self, lora_layer): |
| self.pre_loras.append(lora_layer) |
| |
| def inject_post_lora(self, lora_layer): |
| self.post_loras.append(lora_layer) |
|
|
| def inject_control_states(self, control_states): |
| self.control_states = control_states |
|
|
| def process_control_states(self, hidden_states, scale=1.0): |
| control_states = self.control_states.to(hidden_states.dtype) |
| if hidden_states.ndim == 3 and control_states.ndim == 4: |
| batch, _, height, width = control_states.shape |
| control_states = control_states.permute(0, 2, 3, 1).reshape(batch, height * width, -1) |
| self.control_states = control_states |
| _control_states = control_states |
| if self.concat_hidden: |
| b1, b2 = control_states.shape[0], hidden_states.shape[0] |
| if b1 != b2: |
| control_states = control_states[:,None].repeat(1, b2//b1, *([1]*(len(control_states.shape)-1))) |
| control_states = control_states.view(-1, *control_states.shape[2:]) |
| _control_states = torch.cat([hidden_states, control_states], -1) |
| _control_states = scale * self.to_control(_control_states) |
| if self.control_self_add: |
| control_states = control_states + _control_states |
| else: |
| control_states = _control_states |
|
|
| return control_states |
|
|
| def __call__( |
| self, attn: CrossAttention, hidden_states, encoder_hidden_states=None, attention_mask=None, scale=1.0 |
| ): |
| pre_lora: LoRACrossAttnProcessor |
| post_lora: LoRACrossAttnProcessor |
| assert self.control_states is not None |
|
|
| batch_size, sequence_length, _ = hidden_states.shape |
| attention_mask = attn.prepare_attention_mask(attention_mask, sequence_length) |
| query = attn.to_q(hidden_states) |
| for pre_lora in self.pre_loras: |
| lora_in = query if pre_lora.post_add else hidden_states |
| if isinstance(pre_lora, ControlLoRACrossAttnProcessor): |
| lora_in = lora_in + pre_lora.process_control_states(hidden_states, scale) |
| query = query + scale * pre_lora.to_q_lora(lora_in) |
| query = query + scale * self.to_q_lora(( |
| query if self.post_add else hidden_states) + self.process_control_states(hidden_states, scale)) |
| for post_lora in self.post_loras: |
| lora_in = query if post_lora.post_add else hidden_states |
| if isinstance(post_lora, ControlLoRACrossAttnProcessor): |
| lora_in = lora_in + post_lora.process_control_states(hidden_states, scale) |
| query = query + scale * post_lora.to_q_lora(lora_in) |
| query = attn.head_to_batch_dim(query) |
|
|
| encoder_hidden_states = encoder_hidden_states if encoder_hidden_states is not None else hidden_states |
|
|
| key = attn.to_k(encoder_hidden_states) |
| for pre_lora in self.pre_loras: |
| if not pre_lora.key_states_skipped: |
| key = key + scale * pre_lora.to_k_lora(key if pre_lora.post_add else encoder_hidden_states) |
| if not self.key_states_skipped: |
| key = key + scale * self.to_k_lora(key if self.post_add else encoder_hidden_states) |
| for post_lora in self.post_loras: |
| if not post_lora.key_states_skipped: |
| key = key + scale * post_lora.to_k_lora(key if post_lora.post_add else encoder_hidden_states) |
| value = attn.to_v(encoder_hidden_states) |
| for pre_lora in self.pre_loras: |
| if not pre_lora.value_states_skipped: |
| value = value + pre_lora.to_v_lora(value if pre_lora.post_add else encoder_hidden_states) |
| if not self.value_states_skipped: |
| value = value + scale * self.to_v_lora(value if self.post_add else encoder_hidden_states) |
| for post_lora in self.post_loras: |
| if not post_lora.value_states_skipped: |
| value = value + post_lora.to_v_lora(value if post_lora.post_add else encoder_hidden_states) |
|
|
| key = attn.head_to_batch_dim(key) |
| value = attn.head_to_batch_dim(value) |
|
|
| attention_probs = attn.get_attention_scores(query, key, attention_mask) |
| hidden_states = torch.bmm(attention_probs, value) |
| hidden_states = attn.batch_to_head_dim(hidden_states) |
|
|
| |
| out = attn.to_out[0](hidden_states) |
| for pre_lora in self.pre_loras: |
| if not pre_lora.output_states_skipped: |
| out = out + scale * pre_lora.to_out_lora(out if pre_lora.post_add else hidden_states) |
| out = out + scale * self.to_out_lora(out if self.post_add else hidden_states) |
| for post_lora in self.post_loras: |
| if not post_lora.output_states_skipped: |
| out = out + scale * post_lora.to_out_lora(out if post_lora.post_add else hidden_states) |
| hidden_states = out |
| |
| hidden_states = attn.to_out[1](hidden_states) |
|
|
| return hidden_states |
|
|
|
|
|
|
|
|
| class ControlLoRACrossAttnProcessorV2(LoRACrossAttnProcessor): |
| def __init__( |
| self, |
| hidden_size, |
| cross_attention_dim=None, |
| rank=4, |
| control_rank=None, |
| control_channels=None, |
| **kwargs): |
| super().__init__( |
| hidden_size, |
| cross_attention_dim, |
| rank, |
| post_add=False, |
| key_states_skipped=True, |
| value_states_skipped=True, |
| output_states_skipped=False) |
|
|
| control_rank = rank if control_rank is None else control_rank |
| control_channels = hidden_size if control_channels is None else control_channels |
| self.concat_hidden = True |
| self.control_self_add = False |
| self.control_states: torch.Tensor = None |
|
|
| self.to_control = LoRALinearLayer( |
| hidden_size + control_channels, |
| hidden_size, |
| control_rank) |
| self.to_control_out = LoRALinearLayer( |
| hidden_size + control_channels, |
| hidden_size, |
| control_rank) |
| self.pre_loras: List[LoRACrossAttnProcessor] = [] |
| self.post_loras: List[LoRACrossAttnProcessor] = [] |
|
|
| def inject_pre_lora(self, lora_layer): |
| self.pre_loras.append(lora_layer) |
| |
| def inject_post_lora(self, lora_layer): |
| self.post_loras.append(lora_layer) |
|
|
| def inject_control_states(self, control_states): |
| self.control_states = control_states |
|
|
| def process_control_states(self, hidden_states, scale=1.0, is_out=False): |
| control_states = self.control_states.to(hidden_states.dtype) |
| if hidden_states.ndim == 3 and control_states.ndim == 4: |
| batch, _, height, width = control_states.shape |
| control_states = control_states.permute(0, 2, 3, 1).reshape(batch, height * width, -1) |
| self.control_states = control_states |
| _control_states = control_states |
| if self.concat_hidden: |
| b1, b2 = control_states.shape[0], hidden_states.shape[0] |
| if b1 != b2: |
| control_states = control_states[:,None].repeat(1, b2//b1, *([1]*(len(control_states.shape)-1))) |
| control_states = control_states.view(-1, *control_states.shape[2:]) |
| _control_states = torch.cat([hidden_states, control_states], -1) |
| _control_states = scale * (self.to_control_out if is_out else self.to_control)(_control_states) |
| if self.control_self_add: |
| control_states = control_states + _control_states |
| else: |
| control_states = _control_states |
|
|
| return control_states |
|
|
| def __call__( |
| self, attn: CrossAttention, hidden_states, encoder_hidden_states=None, attention_mask=None, scale=1.0 |
| ): |
| pre_lora: LoRACrossAttnProcessor |
| post_lora: LoRACrossAttnProcessor |
| assert self.control_states is not None |
|
|
| batch_size, sequence_length, _ = hidden_states.shape |
| attention_mask = attn.prepare_attention_mask(attention_mask, sequence_length) |
| for pre_lora in self.pre_loras: |
| if isinstance(pre_lora, ControlLoRACrossAttnProcessorV2): |
| hidden_states = hidden_states + pre_lora.process_control_states(hidden_states, scale) |
| hidden_states = hidden_states + self.process_control_states(hidden_states, scale) |
| for post_lora in self.post_loras: |
| if isinstance(post_lora, ControlLoRACrossAttnProcessorV2): |
| hidden_states = hidden_states + post_lora.process_control_states(hidden_states, scale) |
| query = attn.to_q(hidden_states) |
| for pre_lora in self.pre_loras: |
| lora_in = query if pre_lora.post_add else hidden_states |
| query = query + scale * pre_lora.to_q_lora(lora_in) |
| query = query + scale * self.to_q_lora(query if self.post_add else hidden_states) |
| for post_lora in self.post_loras: |
| lora_in = query if post_lora.post_add else hidden_states |
| query = query + scale * post_lora.to_q_lora(lora_in) |
| query = attn.head_to_batch_dim(query) |
|
|
| encoder_hidden_states = encoder_hidden_states if encoder_hidden_states is not None else hidden_states |
|
|
| key = attn.to_k(encoder_hidden_states) |
| for pre_lora in self.pre_loras: |
| if not pre_lora.key_states_skipped: |
| key = key + scale * pre_lora.to_k_lora(key if pre_lora.post_add else encoder_hidden_states) |
| if not self.key_states_skipped: |
| key = key + scale * self.to_k_lora(key if self.post_add else encoder_hidden_states) |
| for post_lora in self.post_loras: |
| if not post_lora.key_states_skipped: |
| key = key + scale * post_lora.to_k_lora(key if post_lora.post_add else encoder_hidden_states) |
| value = attn.to_v(encoder_hidden_states) |
| for pre_lora in self.pre_loras: |
| if not pre_lora.value_states_skipped: |
| value = value + pre_lora.to_v_lora(value if pre_lora.post_add else encoder_hidden_states) |
| if not self.value_states_skipped: |
| value = value + scale * self.to_v_lora(value if self.post_add else encoder_hidden_states) |
| for post_lora in self.post_loras: |
| if not post_lora.value_states_skipped: |
| value = value + post_lora.to_v_lora(value if post_lora.post_add else encoder_hidden_states) |
|
|
| key = attn.head_to_batch_dim(key) |
| value = attn.head_to_batch_dim(value) |
|
|
| attention_probs = attn.get_attention_scores(query, key, attention_mask) |
| hidden_states = torch.bmm(attention_probs, value) |
| hidden_states = attn.batch_to_head_dim(hidden_states) |
|
|
| |
| for pre_lora in self.pre_loras: |
| if isinstance(pre_lora, ControlLoRACrossAttnProcessorV2): |
| hidden_states = hidden_states + pre_lora.process_control_states(hidden_states, scale, is_out=True) |
| hidden_states = hidden_states + self.process_control_states(hidden_states, scale, is_out=True) |
| for post_lora in self.post_loras: |
| if isinstance(post_lora, ControlLoRACrossAttnProcessorV2): |
| hidden_states = hidden_states + post_lora.process_control_states(hidden_states, scale, is_out=True) |
| out = attn.to_out[0](hidden_states) |
| for pre_lora in self.pre_loras: |
| if not pre_lora.output_states_skipped: |
| out = out + scale * pre_lora.to_out_lora(out if pre_lora.post_add else hidden_states) |
| out = out + scale * self.to_out_lora(out if self.post_add else hidden_states) |
| for post_lora in self.post_loras: |
| if not post_lora.output_states_skipped: |
| out = out + scale * post_lora.to_out_lora(out if post_lora.post_add else hidden_states) |
| hidden_states = out |
| |
| hidden_states = attn.to_out[1](hidden_states) |
|
|
| return hidden_states |
|
|
|
|
| class ConvBlock2D(nn.Module): |
| def __init__( |
| self, |
| *, |
| in_channels, |
| out_channels=None, |
| conv_kernel_size=3, |
| dropout=0.0, |
| temb_channels=512, |
| groups=32, |
| groups_out=None, |
| pre_norm=True, |
| eps=1e-6, |
| non_linearity="swish", |
| time_embedding_norm="default", |
| kernel=None, |
| output_scale_factor=1.0, |
| up=False, |
| down=False, |
| ): |
| super().__init__() |
| self.pre_norm = pre_norm |
| self.pre_norm = True |
| self.in_channels = in_channels |
| out_channels = in_channels if out_channels is None else out_channels |
| self.out_channels = out_channels |
| self.time_embedding_norm = time_embedding_norm |
| self.up = up |
| self.down = down |
| self.output_scale_factor = output_scale_factor |
|
|
| if groups_out is None: |
| groups_out = groups |
|
|
| self.norm1 = torch.nn.GroupNorm(num_groups=groups, num_channels=in_channels, eps=eps, affine=True) |
|
|
| self.conv1 = torch.nn.Conv2d(in_channels, out_channels, kernel_size=conv_kernel_size, stride=1, padding=conv_kernel_size//2) |
|
|
| if temb_channels is not None: |
| if self.time_embedding_norm == "default": |
| time_emb_proj_out_channels = out_channels |
| elif self.time_embedding_norm == "scale_shift": |
| time_emb_proj_out_channels = out_channels * 2 |
| else: |
| raise ValueError(f"unknown time_embedding_norm : {self.time_embedding_norm} ") |
|
|
| self.time_emb_proj = torch.nn.Linear(temb_channels, time_emb_proj_out_channels) |
| else: |
| self.time_emb_proj = None |
|
|
| self.norm2 = torch.nn.GroupNorm(num_groups=groups_out, num_channels=out_channels, eps=eps, affine=True) |
| self.dropout = torch.nn.Dropout(dropout) |
|
|
| if non_linearity == "swish": |
| self.nonlinearity = lambda x: F.silu(x) |
| elif non_linearity == "mish": |
| self.nonlinearity = Mish() |
| elif non_linearity == "silu": |
| self.nonlinearity = nn.SiLU() |
|
|
| self.upsample = self.downsample = None |
| if self.up: |
| if kernel == "fir": |
| fir_kernel = (1, 3, 3, 1) |
| self.upsample = lambda x: upsample_2d(x, kernel=fir_kernel) |
| elif kernel == "sde_vp": |
| self.upsample = partial(F.interpolate, scale_factor=2.0, mode="nearest") |
| else: |
| self.upsample = Upsample2D(in_channels, use_conv=False) |
| elif self.down: |
| if kernel == "fir": |
| fir_kernel = (1, 3, 3, 1) |
| self.downsample = lambda x: downsample_2d(x, kernel=fir_kernel) |
| elif kernel == "sde_vp": |
| self.downsample = partial(F.avg_pool2d, kernel_size=2, stride=2) |
| else: |
| self.downsample = Downsample2D(in_channels, use_conv=False, padding=1, name="op") |
|
|
| def forward(self, input_tensor, temb): |
| hidden_states = input_tensor |
|
|
| hidden_states = self.norm1(hidden_states) |
| hidden_states = self.nonlinearity(hidden_states) |
|
|
| if self.upsample is not None: |
| |
| if hidden_states.shape[0] >= 64: |
| input_tensor = input_tensor.contiguous() |
| hidden_states = hidden_states.contiguous() |
| input_tensor = self.upsample(input_tensor) |
| hidden_states = self.upsample(hidden_states) |
| elif self.downsample is not None: |
| input_tensor = self.downsample(input_tensor) |
| hidden_states = self.downsample(hidden_states) |
|
|
| hidden_states = self.conv1(hidden_states) |
|
|
| if temb is not None: |
| temb = self.time_emb_proj(self.nonlinearity(temb))[:, :, None, None] |
|
|
| if temb is not None and self.time_embedding_norm == "default": |
| hidden_states = hidden_states + temb |
|
|
| hidden_states = self.norm2(hidden_states) |
|
|
| if temb is not None and self.time_embedding_norm == "scale_shift": |
| scale, shift = torch.chunk(temb, 2, dim=1) |
| hidden_states = hidden_states * (1 + scale) + shift |
|
|
| hidden_states = self.nonlinearity(hidden_states) |
|
|
| output_tensor = self.dropout(hidden_states) |
|
|
| return output_tensor |
|
|
|
|
| class SimpleDownEncoderBlock2D(nn.Module): |
| def __init__( |
| self, |
| in_channels: int, |
| out_channels: int, |
| dropout: float = 0.0, |
| num_layers: int = 1, |
| convnet_eps: float = 1e-6, |
| convnet_time_scale_shift: str = "default", |
| convnet_act_fn: str = "swish", |
| convnet_groups: int = 32, |
| convnet_pre_norm: bool = True, |
| convnet_kernel_size: int = 3, |
| output_scale_factor=1.0, |
| add_downsample=True, |
| downsample_padding=1, |
| ): |
| super().__init__() |
| convnets = [] |
|
|
| for i in range(num_layers): |
| in_channels = in_channels if i == 0 else out_channels |
| convnets.append( |
| ConvBlock2D( |
| in_channels=in_channels, |
| out_channels=out_channels, |
| temb_channels=None, |
| eps=convnet_eps, |
| groups=convnet_groups, |
| dropout=dropout, |
| time_embedding_norm=convnet_time_scale_shift, |
| non_linearity=convnet_act_fn, |
| output_scale_factor=output_scale_factor, |
| pre_norm=convnet_pre_norm, |
| conv_kernel_size=convnet_kernel_size, |
| ) |
| ) |
| in_channels = in_channels if num_layers == 0 else out_channels |
|
|
| self.convnets = nn.ModuleList(convnets) |
|
|
| if add_downsample: |
| self.downsamplers = nn.ModuleList( |
| [ |
| Downsample2D( |
| in_channels, use_conv=True, out_channels=out_channels, padding=downsample_padding, name="op" |
| ) |
| ] |
| ) |
| else: |
| self.downsamplers = None |
|
|
| def forward(self, hidden_states): |
| for convnet in self.convnets: |
| hidden_states = convnet(hidden_states, temb=None) |
|
|
| if self.downsamplers is not None: |
| for downsampler in self.downsamplers: |
| hidden_states = downsampler(hidden_states) |
|
|
| return hidden_states |
|
|
|
|
| @dataclass |
| class ControlLoRAOutput(BaseOutput): |
| control_states: Tuple[torch.FloatTensor] |
|
|
|
|
| class ControlLoRA(ModelMixin, ConfigMixin): |
| @register_to_config |
| def __init__( |
| self, |
| in_channels: int = 3, |
| down_block_types: Tuple[str] = ( |
| "SimpleDownEncoderBlock2D", |
| "SimpleDownEncoderBlock2D", |
| "SimpleDownEncoderBlock2D", |
| "SimpleDownEncoderBlock2D", |
| ), |
| block_out_channels: Tuple[int] = (32, 64, 128, 256), |
| layers_per_block: int = 1, |
| act_fn: str = "silu", |
| norm_num_groups: int = 32, |
| lora_pre_down_block_types: Tuple[str] = ( |
| None, |
| "SimpleDownEncoderBlock2D", |
| "SimpleDownEncoderBlock2D", |
| "SimpleDownEncoderBlock2D", |
| ), |
| lora_pre_down_layers_per_block: int = 1, |
| lora_pre_conv_skipped: bool = False, |
| lora_pre_conv_types: Tuple[str] = ( |
| "SimpleDownEncoderBlock2D", |
| "SimpleDownEncoderBlock2D", |
| "SimpleDownEncoderBlock2D", |
| "SimpleDownEncoderBlock2D", |
| ), |
| lora_pre_conv_layers_per_block: int = 1, |
| lora_pre_conv_layers_kernel_size: int = 1, |
| lora_block_in_channels: Tuple[int] = (256, 256, 256, 256), |
| lora_block_out_channels: Tuple[int] = (320, 640, 1280, 1280), |
| lora_cross_attention_dims: Tuple[List[int]] = ( |
| [None, 768, None, 768, None, 768, None, 768, None, 768], |
| [None, 768, None, 768, None, 768, None, 768, None, 768], |
| [None, 768, None, 768, None, 768, None, 768, None, 768], |
| [None, 768] |
| ), |
| lora_rank: int = 4, |
| lora_control_rank: int = None, |
| lora_post_add: bool = False, |
| lora_concat_hidden: bool = False, |
| lora_control_channels: Tuple[int] = (None, None, None, None), |
| lora_control_self_add: bool = True, |
| lora_key_states_skipped: bool = False, |
| lora_value_states_skipped: bool = False, |
| lora_output_states_skipped: bool = False, |
| lora_control_version: int = 1 |
| ): |
| super().__init__() |
|
|
| lora_control_cls = ControlLoRACrossAttnProcessor |
| if lora_control_version == 2: |
| lora_control_cls = ControlLoRACrossAttnProcessorV2 |
|
|
| assert lora_block_in_channels[0] == block_out_channels[-1] |
| |
| if lora_pre_conv_skipped: |
| lora_control_channels = lora_block_in_channels |
| lora_control_self_add = False |
|
|
| self.layers_per_block = layers_per_block |
| self.lora_pre_down_layers_per_block = lora_pre_down_layers_per_block |
| self.lora_pre_conv_layers_per_block = lora_pre_conv_layers_per_block |
|
|
| self.conv_in = torch.nn.Conv2d(in_channels, block_out_channels[0], kernel_size=3, stride=1, padding=1) |
|
|
| self.down_blocks = nn.ModuleList([]) |
| self.pre_lora_layers = nn.ModuleList([]) |
| self.lora_layers = nn.ModuleList([]) |
|
|
| |
| pre_down_blocks = [] |
| output_channel = block_out_channels[0] |
| for i, down_block_type in enumerate(down_block_types): |
| input_channel = output_channel |
| output_channel = block_out_channels[i] |
| is_final_block = i == len(block_out_channels) - 1 |
|
|
| pre_down_block = get_down_block( |
| down_block_type, |
| num_layers=self.layers_per_block, |
| in_channels=input_channel, |
| out_channels=output_channel, |
| add_downsample=not is_final_block, |
| resnet_eps=1e-6, |
| downsample_padding=0, |
| resnet_act_fn=act_fn, |
| resnet_groups=norm_num_groups, |
| attn_num_head_channels=None, |
| temb_channels=None, |
| ) |
| pre_down_blocks.append(pre_down_block) |
| self.down_blocks.append(nn.Sequential(*pre_down_blocks)) |
| self.pre_lora_layers.append( |
| get_down_block( |
| lora_pre_conv_types[0], |
| num_layers=self.lora_pre_conv_layers_per_block, |
| in_channels=lora_block_in_channels[0], |
| out_channels=( |
| lora_block_out_channels[0] |
| if lora_control_channels[0] is None |
| else lora_control_channels[0]), |
| add_downsample=False, |
| resnet_eps=1e-6, |
| downsample_padding=0, |
| resnet_act_fn=act_fn, |
| resnet_groups=norm_num_groups, |
| attn_num_head_channels=None, |
| temb_channels=None, |
| resnet_kernel_size=lora_pre_conv_layers_kernel_size, |
| ) if not lora_pre_conv_skipped else nn.Identity() |
| ) |
| self.lora_layers.append( |
| nn.ModuleList([ |
| lora_control_cls( |
| lora_block_out_channels[0], |
| cross_attention_dim=cross_attention_dim, |
| rank=lora_rank, |
| control_rank=lora_control_rank, |
| post_add=lora_post_add, |
| concat_hidden=lora_concat_hidden, |
| control_channels=lora_control_channels[0], |
| control_self_add=lora_control_self_add, |
| key_states_skipped=lora_key_states_skipped, |
| value_states_skipped=lora_value_states_skipped, |
| output_states_skipped=lora_output_states_skipped) |
| for cross_attention_dim in lora_cross_attention_dims[0] |
| ]) |
| ) |
| |
| |
| output_channel = lora_block_in_channels[0] |
| for i, down_block_type in enumerate(lora_pre_down_block_types): |
| if i == 0: |
| continue |
| input_channel = output_channel |
| output_channel = lora_block_in_channels[i] |
|
|
| down_block = get_down_block( |
| down_block_type, |
| num_layers=self.lora_pre_down_layers_per_block, |
| in_channels=input_channel, |
| out_channels=output_channel, |
| add_downsample=True, |
| resnet_eps=1e-6, |
| downsample_padding=0, |
| resnet_act_fn=act_fn, |
| resnet_groups=norm_num_groups, |
| attn_num_head_channels=None, |
| temb_channels=None, |
| ) |
| self.down_blocks.append(down_block) |
|
|
| self.pre_lora_layers.append( |
| get_down_block( |
| lora_pre_conv_types[i], |
| num_layers=self.lora_pre_conv_layers_per_block, |
| in_channels=output_channel, |
| out_channels=( |
| lora_block_out_channels[i] |
| if lora_control_channels[i] is None |
| else lora_control_channels[i]), |
| add_downsample=False, |
| resnet_eps=1e-6, |
| downsample_padding=0, |
| resnet_act_fn=act_fn, |
| resnet_groups=norm_num_groups, |
| attn_num_head_channels=None, |
| temb_channels=None, |
| resnet_kernel_size=lora_pre_conv_layers_kernel_size, |
| ) if not lora_pre_conv_skipped else nn.Identity() |
| ) |
| self.lora_layers.append( |
| nn.ModuleList([ |
| lora_control_cls( |
| lora_block_out_channels[i], |
| cross_attention_dim=cross_attention_dim, |
| rank=lora_rank, |
| control_rank=lora_control_rank, |
| post_add=lora_post_add, |
| concat_hidden=lora_concat_hidden, |
| control_channels=lora_control_channels[i], |
| control_self_add=lora_control_self_add, |
| key_states_skipped=lora_key_states_skipped, |
| value_states_skipped=lora_value_states_skipped, |
| output_states_skipped=lora_output_states_skipped) |
| for cross_attention_dim in lora_cross_attention_dims[i] |
| ]) |
| ) |
|
|
| def forward(self, x: torch.FloatTensor, return_dict: bool = True) -> Union[ControlLoRAOutput, Tuple]: |
| lora_layer: ControlLoRACrossAttnProcessor |
| |
| orig_dtype = x.dtype |
| dtype = self.conv_in.weight.dtype |
|
|
| h = x.to(dtype) |
| h = self.conv_in(h) |
| control_states_list = [] |
|
|
| |
| for down_block, pre_lora_layer, lora_layer_list in zip( |
| self.down_blocks, self.pre_lora_layers, self.lora_layers): |
| h = down_block(h) |
| control_states = pre_lora_layer(h) |
| if isinstance(control_states, tuple): |
| control_states = control_states[0] |
| control_states = control_states.to(orig_dtype) |
| for lora_layer in lora_layer_list: |
| lora_layer.inject_control_states(control_states) |
| control_states_list.append(control_states) |
|
|
| if not return_dict: |
| return tuple(control_states_list) |
|
|
| return ControlLoRAOutput(control_states=tuple(control_states_list)) |
|
|
