import sys import torch import torch.nn as nn import torch.nn.functional as F import weakref from typing import Union, TYPE_CHECKING, Optional from collections import OrderedDict from diffusers import Transformer2DModel, FluxTransformer2DModel from transformers import T5EncoderModel, CLIPTextModel, CLIPTokenizer, T5Tokenizer, CLIPVisionModelWithProjection from toolkit.config_modules import AdapterConfig from toolkit.paths import REPOS_ROOT sys.path.append(REPOS_ROOT) if TYPE_CHECKING: from toolkit.stable_diffusion_model import StableDiffusion from toolkit.custom_adapter import CustomAdapter class MLPR(nn.Module): # MLP with reshaping def __init__( self, in_dim, in_channels, out_dim, out_channels, hidden_dim, hidden_channels, use_residual=True ): super().__init__() if use_residual: assert in_dim == out_dim # dont normalize if using conv self.layer_norm = nn.LayerNorm(in_dim) self.fc1 = nn.Linear(in_dim, hidden_dim) self.conv1 = nn.Conv1d(in_channels, hidden_channels, 1) self.fc2 = nn.Linear(hidden_dim, out_dim) self.conv2 = nn.Conv1d(hidden_channels, out_channels, 1) self.use_residual = use_residual self.act_fn = nn.GELU() def forward(self, x): residual = x x = self.layer_norm(x) x = self.fc1(x) x = self.conv1(x) x = self.act_fn(x) x = self.fc2(x) x = self.conv2(x) if self.use_residual: x = x + residual return x class AttnProcessor2_0(torch.nn.Module): r""" Processor for implementing scaled dot-product attention (enabled by default if you're using PyTorch 2.0). """ def __init__( self, hidden_size=None, cross_attention_dim=None, ): super().__init__() if not hasattr(F, "scaled_dot_product_attention"): raise ImportError("AttnProcessor2_0 requires PyTorch 2.0, to use it, please upgrade PyTorch to 2.0.") def __call__( self, attn, hidden_states, encoder_hidden_states=None, attention_mask=None, temb=None, ): residual = hidden_states if attn.spatial_norm is not None: hidden_states = attn.spatial_norm(hidden_states, temb) input_ndim = hidden_states.ndim if input_ndim == 4: batch_size, channel, height, width = hidden_states.shape hidden_states = hidden_states.view(batch_size, channel, height * width).transpose(1, 2) batch_size, sequence_length, _ = ( hidden_states.shape if encoder_hidden_states is None else encoder_hidden_states.shape ) if attention_mask is not None: attention_mask = attn.prepare_attention_mask(attention_mask, sequence_length, batch_size) # scaled_dot_product_attention expects attention_mask shape to be # (batch, heads, source_length, target_length) attention_mask = attention_mask.view(batch_size, attn.heads, -1, attention_mask.shape[-1]) if attn.group_norm is not None: hidden_states = attn.group_norm(hidden_states.transpose(1, 2)).transpose(1, 2) query = attn.to_q(hidden_states) if encoder_hidden_states is None: encoder_hidden_states = hidden_states elif attn.norm_cross: encoder_hidden_states = attn.norm_encoder_hidden_states(encoder_hidden_states) key = attn.to_k(encoder_hidden_states) value = attn.to_v(encoder_hidden_states) inner_dim = key.shape[-1] head_dim = inner_dim // attn.heads query = query.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) key = key.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) value = value.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) # the output of sdp = (batch, num_heads, seq_len, head_dim) # TODO: add support for attn.scale when we move to Torch 2.1 hidden_states = F.scaled_dot_product_attention( query, key, value, attn_mask=attention_mask, dropout_p=0.0, is_causal=False ) hidden_states = hidden_states.transpose(1, 2).reshape(batch_size, -1, attn.heads * head_dim) hidden_states = hidden_states.to(query.dtype) # linear proj hidden_states = attn.to_out[0](hidden_states) # dropout hidden_states = attn.to_out[1](hidden_states) if input_ndim == 4: hidden_states = hidden_states.transpose(-1, -2).reshape(batch_size, channel, height, width) if attn.residual_connection: hidden_states = hidden_states + residual hidden_states = hidden_states / attn.rescale_output_factor return hidden_states class VisionDirectAdapterAttnProcessor(nn.Module): r""" Attention processor for Custom TE for PyTorch 2.0. Args: hidden_size (`int`): The hidden size of the attention layer. cross_attention_dim (`int`): The number of channels in the `encoder_hidden_states`. scale (`float`, defaults to 1.0): the weight scale of image prompt. adapter """ def __init__(self, hidden_size, cross_attention_dim=None, scale=1.0, adapter=None, adapter_hidden_size=None, has_bias=False, **kwargs): super().__init__() if not hasattr(F, "scaled_dot_product_attention"): raise ImportError("AttnProcessor2_0 requires PyTorch 2.0, to use it, please upgrade PyTorch to 2.0.") self.adapter_ref: weakref.ref = weakref.ref(adapter) self.hidden_size = hidden_size self.adapter_hidden_size = adapter_hidden_size self.cross_attention_dim = cross_attention_dim self.scale = scale self.to_k_adapter = nn.Linear(adapter_hidden_size, hidden_size, bias=has_bias) self.to_v_adapter = nn.Linear(adapter_hidden_size, hidden_size, bias=has_bias) @property def is_active(self): return self.adapter_ref().is_active # return False @property def unconditional_embeds(self): return self.adapter_ref().adapter_ref().unconditional_embeds @property def conditional_embeds(self): return self.adapter_ref().adapter_ref().conditional_embeds def __call__( self, attn, hidden_states, encoder_hidden_states=None, attention_mask=None, temb=None, ): is_active = self.adapter_ref().is_active residual = hidden_states if attn.spatial_norm is not None: hidden_states = attn.spatial_norm(hidden_states, temb) input_ndim = hidden_states.ndim if input_ndim == 4: batch_size, channel, height, width = hidden_states.shape hidden_states = hidden_states.view(batch_size, channel, height * width).transpose(1, 2) batch_size, sequence_length, _ = ( hidden_states.shape if encoder_hidden_states is None else encoder_hidden_states.shape ) if attention_mask is not None: attention_mask = attn.prepare_attention_mask(attention_mask, sequence_length, batch_size) # scaled_dot_product_attention expects attention_mask shape to be # (batch, heads, source_length, target_length) attention_mask = attention_mask.view(batch_size, attn.heads, -1, attention_mask.shape[-1]) if attn.group_norm is not None: hidden_states = attn.group_norm(hidden_states.transpose(1, 2)).transpose(1, 2) query = attn.to_q(hidden_states) # will be none if disabled if encoder_hidden_states is None: encoder_hidden_states = hidden_states elif attn.norm_cross: encoder_hidden_states = attn.norm_encoder_hidden_states(encoder_hidden_states) key = attn.to_k(encoder_hidden_states) value = attn.to_v(encoder_hidden_states) inner_dim = key.shape[-1] head_dim = inner_dim // attn.heads query = query.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) key = key.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) value = value.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) # the output of sdp = (batch, num_heads, seq_len, head_dim) # TODO: add support for attn.scale when we move to Torch 2.1 hidden_states = F.scaled_dot_product_attention( query, key, value, attn_mask=attention_mask, dropout_p=0.0, is_causal=False ) hidden_states = hidden_states.transpose(1, 2).reshape(batch_size, -1, attn.heads * head_dim) hidden_states = hidden_states.to(query.dtype) # only use one TE or the other. If our adapter is active only use ours if self.is_active and self.conditional_embeds is not None: adapter_hidden_states = self.conditional_embeds if adapter_hidden_states.shape[0] < batch_size: adapter_hidden_states = torch.cat([ self.unconditional_embeds, adapter_hidden_states ], dim=0) # if it is image embeds, we need to add a 1 dim at inx 1 if len(adapter_hidden_states.shape) == 2: adapter_hidden_states = adapter_hidden_states.unsqueeze(1) # conditional_batch_size = adapter_hidden_states.shape[0] # conditional_query = query # for ip-adapter vd_key = self.to_k_adapter(adapter_hidden_states) vd_value = self.to_v_adapter(adapter_hidden_states) vd_key = vd_key.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) vd_value = vd_value.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) # the output of sdp = (batch, num_heads, seq_len, head_dim) # TODO: add support for attn.scale when we move to Torch 2.1 vd_hidden_states = F.scaled_dot_product_attention( query, vd_key, vd_value, attn_mask=None, dropout_p=0.0, is_causal=False ) vd_hidden_states = vd_hidden_states.transpose(1, 2).reshape(batch_size, -1, attn.heads * head_dim) vd_hidden_states = vd_hidden_states.to(query.dtype) hidden_states = hidden_states + self.scale * vd_hidden_states # linear proj hidden_states = attn.to_out[0](hidden_states) # dropout hidden_states = attn.to_out[1](hidden_states) if input_ndim == 4: hidden_states = hidden_states.transpose(-1, -2).reshape(batch_size, channel, height, width) if attn.residual_connection: hidden_states = hidden_states + residual hidden_states = hidden_states / attn.rescale_output_factor return hidden_states class CustomFluxVDAttnProcessor2_0(torch.nn.Module): """Attention processor used typically in processing the SD3-like self-attention projections.""" def __init__(self, hidden_size, cross_attention_dim=None, scale=1.0, adapter=None, adapter_hidden_size=None, has_bias=False, block_idx=0, **kwargs): super().__init__() if not hasattr(F, "scaled_dot_product_attention"): raise ImportError("AttnProcessor2_0 requires PyTorch 2.0, to use it, please upgrade PyTorch to 2.0.") self.adapter_ref: weakref.ref = weakref.ref(adapter) self.hidden_size = hidden_size self.adapter_hidden_size = adapter_hidden_size self.cross_attention_dim = cross_attention_dim self.scale = scale self.block_idx = block_idx self.to_k_adapter = nn.Linear(adapter_hidden_size, hidden_size, bias=has_bias) self.to_v_adapter = nn.Linear(adapter_hidden_size, hidden_size, bias=has_bias) @property def is_active(self): return self.adapter_ref().is_active # return False @property def unconditional_embeds(self): return self.adapter_ref().adapter_ref().unconditional_embeds @property def conditional_embeds(self): return self.adapter_ref().adapter_ref().conditional_embeds def __call__( self, attn, hidden_states: torch.FloatTensor, encoder_hidden_states: torch.FloatTensor = None, attention_mask: Optional[torch.FloatTensor] = None, image_rotary_emb: Optional[torch.Tensor] = None, ) -> torch.FloatTensor: batch_size, _, _ = hidden_states.shape if encoder_hidden_states is None else encoder_hidden_states.shape # `sample` projections. query = attn.to_q(hidden_states) key = attn.to_k(hidden_states) value = attn.to_v(hidden_states) inner_dim = key.shape[-1] head_dim = inner_dim // attn.heads query = query.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) key = key.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) value = value.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) if attn.norm_q is not None: query = attn.norm_q(query) if attn.norm_k is not None: key = attn.norm_k(key) # the attention in FluxSingleTransformerBlock does not use `encoder_hidden_states` if encoder_hidden_states is not None: # `context` projections. encoder_hidden_states_query_proj = attn.add_q_proj(encoder_hidden_states) encoder_hidden_states_key_proj = attn.add_k_proj(encoder_hidden_states) encoder_hidden_states_value_proj = attn.add_v_proj(encoder_hidden_states) encoder_hidden_states_query_proj = encoder_hidden_states_query_proj.view( batch_size, -1, attn.heads, head_dim ).transpose(1, 2) encoder_hidden_states_key_proj = encoder_hidden_states_key_proj.view( batch_size, -1, attn.heads, head_dim ).transpose(1, 2) encoder_hidden_states_value_proj = encoder_hidden_states_value_proj.view( batch_size, -1, attn.heads, head_dim ).transpose(1, 2) if attn.norm_added_q is not None: encoder_hidden_states_query_proj = attn.norm_added_q(encoder_hidden_states_query_proj) if attn.norm_added_k is not None: encoder_hidden_states_key_proj = attn.norm_added_k(encoder_hidden_states_key_proj) # attention query = torch.cat([encoder_hidden_states_query_proj, query], dim=2) key = torch.cat([encoder_hidden_states_key_proj, key], dim=2) value = torch.cat([encoder_hidden_states_value_proj, value], dim=2) if image_rotary_emb is not None: from diffusers.models.embeddings import apply_rotary_emb query = apply_rotary_emb(query, image_rotary_emb) key = apply_rotary_emb(key, image_rotary_emb) hidden_states = F.scaled_dot_product_attention(query, key, value, dropout_p=0.0, is_causal=False) hidden_states = hidden_states.transpose(1, 2).reshape(batch_size, -1, attn.heads * head_dim) hidden_states = hidden_states.to(query.dtype) # begin ip adapter if self.is_active and self.conditional_embeds is not None: adapter_hidden_states = self.conditional_embeds block_scaler = self.adapter_ref().block_scaler if block_scaler is not None: # add 1 to block scaler so we can decay its weight to 1.0 block_scaler = block_scaler[self.block_idx] + 1.0 if adapter_hidden_states.shape[0] < batch_size: adapter_hidden_states = torch.cat([ self.unconditional_embeds, adapter_hidden_states ], dim=0) # if it is image embeds, we need to add a 1 dim at inx 1 if len(adapter_hidden_states.shape) == 2: adapter_hidden_states = adapter_hidden_states.unsqueeze(1) # conditional_batch_size = adapter_hidden_states.shape[0] # conditional_query = query # for ip-adapter vd_key = self.to_k_adapter(adapter_hidden_states) vd_value = self.to_v_adapter(adapter_hidden_states) vd_key = vd_key.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) vd_value = vd_value.view(batch_size, -1, attn.heads, head_dim).transpose(1, 2) vd_hidden_states = F.scaled_dot_product_attention( query, vd_key, vd_value, attn_mask=None, dropout_p=0.0, is_causal=False ) vd_hidden_states = vd_hidden_states.transpose(1, 2).reshape(batch_size, -1, attn.heads * head_dim) vd_hidden_states = vd_hidden_states.to(query.dtype) # scale to block scaler if block_scaler is not None: orig_dtype = vd_hidden_states.dtype if block_scaler.dtype != vd_hidden_states.dtype: vd_hidden_states = vd_hidden_states.to(block_scaler.dtype) vd_hidden_states = vd_hidden_states * block_scaler if block_scaler.dtype != orig_dtype: vd_hidden_states = vd_hidden_states.to(orig_dtype) hidden_states = hidden_states + self.scale * vd_hidden_states if encoder_hidden_states is not None: encoder_hidden_states, hidden_states = ( hidden_states[:, : encoder_hidden_states.shape[1]], hidden_states[:, encoder_hidden_states.shape[1] :], ) # linear proj hidden_states = attn.to_out[0](hidden_states) # dropout hidden_states = attn.to_out[1](hidden_states) encoder_hidden_states = attn.to_add_out(encoder_hidden_states) return hidden_states, encoder_hidden_states else: return hidden_states class VisionDirectAdapter(torch.nn.Module): def __init__( self, adapter: 'CustomAdapter', sd: 'StableDiffusion', vision_model: Union[CLIPVisionModelWithProjection], ): super(VisionDirectAdapter, self).__init__() is_pixart = sd.is_pixart is_flux = sd.is_flux self.adapter_ref: weakref.ref = weakref.ref(adapter) self.sd_ref: weakref.ref = weakref.ref(sd) self.config: AdapterConfig = adapter.config self.vision_model_ref: weakref.ref = weakref.ref(vision_model) if adapter.config.clip_layer == "image_embeds": self.token_size = vision_model.config.projection_dim else: self.token_size = vision_model.config.hidden_size # init adapter modules attn_procs = {} unet_sd = sd.unet.state_dict() attn_processor_keys = [] if is_pixart: transformer: Transformer2DModel = sd.unet for i, module in transformer.transformer_blocks.named_children(): attn_processor_keys.append(f"transformer_blocks.{i}.attn1") # cross attention attn_processor_keys.append(f"transformer_blocks.{i}.attn2") elif is_flux: transformer: FluxTransformer2DModel = sd.unet for i, module in transformer.transformer_blocks.named_children(): attn_processor_keys.append(f"transformer_blocks.{i}.attn") # single transformer blocks do not have cross attn, but we will do them anyway for i, module in transformer.single_transformer_blocks.named_children(): attn_processor_keys.append(f"single_transformer_blocks.{i}.attn") else: attn_processor_keys = list(sd.unet.attn_processors.keys()) current_idx = 0 for name in attn_processor_keys: if is_flux: cross_attention_dim = None else: cross_attention_dim = None if name.endswith("attn1.processor") or name.endswith("attn.1") else sd.unet.config['cross_attention_dim'] if name.startswith("mid_block"): hidden_size = sd.unet.config['block_out_channels'][-1] elif name.startswith("up_blocks"): block_id = int(name[len("up_blocks.")]) hidden_size = list(reversed(sd.unet.config['block_out_channels']))[block_id] elif name.startswith("down_blocks"): block_id = int(name[len("down_blocks.")]) hidden_size = sd.unet.config['block_out_channels'][block_id] elif name.startswith("transformer") or name.startswith("single_transformer"): if is_flux: hidden_size = 3072 else: hidden_size = sd.unet.config['cross_attention_dim'] else: # they didnt have this, but would lead to undefined below raise ValueError(f"unknown attn processor name: {name}") if cross_attention_dim is None and not is_flux: attn_procs[name] = AttnProcessor2_0() else: layer_name = name.split(".processor")[0] if f"{layer_name}.to_k.weight._data" in unet_sd and is_flux: # is quantized to_k_adapter = torch.randn(hidden_size, hidden_size) * 0.01 to_v_adapter = torch.randn(hidden_size, hidden_size) * 0.01 to_k_adapter = to_k_adapter.to(self.sd_ref().torch_dtype) to_v_adapter = to_v_adapter.to(self.sd_ref().torch_dtype) else: to_k_adapter = unet_sd[layer_name + ".to_k.weight"] to_v_adapter = unet_sd[layer_name + ".to_v.weight"] # add zero padding to the adapter if to_k_adapter.shape[1] < self.token_size: to_k_adapter = torch.cat([ to_k_adapter, torch.randn(to_k_adapter.shape[0], self.token_size - to_k_adapter.shape[1]).to( to_k_adapter.device, dtype=to_k_adapter.dtype) * 0.01 ], dim=1 ) to_v_adapter = torch.cat([ to_v_adapter, torch.randn(to_v_adapter.shape[0], self.token_size - to_v_adapter.shape[1]).to( to_k_adapter.device, dtype=to_k_adapter.dtype) * 0.01 ], dim=1 ) elif to_k_adapter.shape[1] > self.token_size: to_k_adapter = to_k_adapter[:, :self.token_size] to_v_adapter = to_v_adapter[:, :self.token_size] # if is_pixart: # to_k_bias = to_k_bias[:self.token_size] # to_v_bias = to_v_bias[:self.token_size] else: to_k_adapter = to_k_adapter to_v_adapter = to_v_adapter # if is_pixart: # to_k_bias = to_k_bias # to_v_bias = to_v_bias weights = { "to_k_adapter.weight": to_k_adapter * 0.01, "to_v_adapter.weight": to_v_adapter * 0.01, } # if is_pixart: # weights["to_k_adapter.bias"] = to_k_bias # weights["to_v_adapter.bias"] = to_v_bias\ if is_flux: attn_procs[name] = CustomFluxVDAttnProcessor2_0( hidden_size=hidden_size, cross_attention_dim=cross_attention_dim, scale=1.0, adapter=self, adapter_hidden_size=self.token_size, has_bias=False, block_idx=current_idx ) else: attn_procs[name] = VisionDirectAdapterAttnProcessor( hidden_size=hidden_size, cross_attention_dim=cross_attention_dim, scale=1.0, adapter=self, adapter_hidden_size=self.token_size, has_bias=False, ) current_idx += 1 attn_procs[name].load_state_dict(weights) if self.sd_ref().is_pixart: # we have to set them ourselves transformer: Transformer2DModel = sd.unet for i, module in transformer.transformer_blocks.named_children(): module.attn1.processor = attn_procs[f"transformer_blocks.{i}.attn1"] module.attn2.processor = attn_procs[f"transformer_blocks.{i}.attn2"] self.adapter_modules = torch.nn.ModuleList([ transformer.transformer_blocks[i].attn1.processor for i in range(len(transformer.transformer_blocks)) ] + [ transformer.transformer_blocks[i].attn2.processor for i in range(len(transformer.transformer_blocks)) ]) elif self.sd_ref().is_flux: # we have to set them ourselves transformer: FluxTransformer2DModel = sd.unet for i, module in transformer.transformer_blocks.named_children(): module.attn.processor = attn_procs[f"transformer_blocks.{i}.attn"] if not self.config.flux_only_double: # do single blocks too even though they dont have cross attn for i, module in transformer.single_transformer_blocks.named_children(): module.attn.processor = attn_procs[f"single_transformer_blocks.{i}.attn"] if not self.config.flux_only_double: self.adapter_modules = torch.nn.ModuleList( [ transformer.transformer_blocks[i].attn.processor for i in range(len(transformer.transformer_blocks)) ] + [ transformer.single_transformer_blocks[i].attn.processor for i in range(len(transformer.single_transformer_blocks)) ] ) else: self.adapter_modules = torch.nn.ModuleList( [ transformer.transformer_blocks[i].attn.processor for i in range(len(transformer.transformer_blocks)) ] ) else: sd.unet.set_attn_processor(attn_procs) self.adapter_modules = torch.nn.ModuleList(sd.unet.attn_processors.values()) num_modules = len(self.adapter_modules) if self.config.train_scaler: self.block_scaler = torch.nn.Parameter(torch.tensor([0.0] * num_modules).to( dtype=torch.float32, device=self.sd_ref().device_torch )) self.block_scaler.data = self.block_scaler.data.to(torch.float32) self.block_scaler.requires_grad = True else: self.block_scaler = None if self.config.num_tokens is not None: image_encoder_state_dict = self.adapter_ref().vision_encoder.state_dict() # max_seq_len = CLIP tokens + CLS token max_seq_len = 257 if "vision_model.embeddings.position_embedding.weight" in image_encoder_state_dict: # clip max_seq_len = int( image_encoder_state_dict["vision_model.embeddings.position_embedding.weight"].shape[0]) self.resampler = MLPR( in_dim=self.token_size, in_channels=max_seq_len, out_dim=self.token_size, out_channels=self.config.num_tokens, hidden_dim=self.token_size, hidden_channels=max_seq_len, use_residual=False ) def state_dict(self, destination=None, prefix='', keep_vars=False): if self.config.train_scaler: # only return the block scaler if destination is None: destination = OrderedDict() destination[prefix + 'block_scaler'] = self.block_scaler return destination return super().state_dict(destination, prefix, keep_vars) # make a getter to see if is active @property def is_active(self): return self.adapter_ref().is_active def forward(self, input): # block scaler keeps moving dtypes. make sure it is float32 here # todo remove this when we have a real solution if self.block_scaler is not None and self.block_scaler.dtype != torch.float32: self.block_scaler.data = self.block_scaler.data.to(torch.float32) if self.config.num_tokens is not None: input = self.resampler(input) return input def to(self, *args, **kwargs): super().to(*args, **kwargs) if self.block_scaler is not None: if self.block_scaler.dtype != torch.float32: self.block_scaler.data = self.block_scaler.data.to(torch.float32) return self def post_weight_update(self): # force block scaler to be mean of 1 pass