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from .attention import Attention
from einops import rearrange
def low_version_attention(query, key, value, attn_bias=None):
scale = 1 / query.shape[-1] ** 0.5
query = query * scale
attn = torch.matmul(query, key.transpose(-2, -1))
if attn_bias is not None:
attn = attn + attn_bias
attn = attn.softmax(-1)
return attn @ value
class Attention(torch.nn.Module):
def __init__(self, q_dim, num_heads, head_dim, kv_dim=None, bias_q=False, bias_kv=False, bias_out=False):
super().__init__()
dim_inner = head_dim * num_heads
kv_dim = kv_dim if kv_dim is not None else q_dim
self.num_heads = num_heads
self.head_dim = head_dim
self.to_q = torch.nn.Linear(q_dim, dim_inner, bias=bias_q)
self.to_k = torch.nn.Linear(kv_dim, dim_inner, bias=bias_kv)
self.to_v = torch.nn.Linear(kv_dim, dim_inner, bias=bias_kv)
self.to_out = torch.nn.Linear(dim_inner, q_dim, bias=bias_out)
def interact_with_ipadapter(self, hidden_states, q, ip_k, ip_v, scale=1.0):
batch_size = q.shape[0]
ip_k = ip_k.view(batch_size, -1, self.num_heads, self.head_dim).transpose(1, 2)
ip_v = ip_v.view(batch_size, -1, self.num_heads, self.head_dim).transpose(1, 2)
ip_hidden_states = torch.nn.functional.scaled_dot_product_attention(q, ip_k, ip_v)
hidden_states = hidden_states + scale * ip_hidden_states
return hidden_states
def torch_forward(self, hidden_states, encoder_hidden_states=None, attn_mask=None, ipadapter_kwargs=None, qkv_preprocessor=None):
if encoder_hidden_states is None:
encoder_hidden_states = hidden_states
batch_size = encoder_hidden_states.shape[0]
q = self.to_q(hidden_states)
k = self.to_k(encoder_hidden_states)
v = self.to_v(encoder_hidden_states)
q = q.view(batch_size, -1, self.num_heads, self.head_dim).transpose(1, 2)
k = k.view(batch_size, -1, self.num_heads, self.head_dim).transpose(1, 2)
v = v.view(batch_size, -1, self.num_heads, self.head_dim).transpose(1, 2)
if qkv_preprocessor is not None:
q, k, v = qkv_preprocessor(q, k, v)
hidden_states = torch.nn.functional.scaled_dot_product_attention(q, k, v, attn_mask=attn_mask)
if ipadapter_kwargs is not None:
hidden_states = self.interact_with_ipadapter(hidden_states, q, **ipadapter_kwargs)
hidden_states = hidden_states.transpose(1, 2).reshape(batch_size, -1, self.num_heads * self.head_dim)
hidden_states = hidden_states.to(q.dtype)
hidden_states = self.to_out(hidden_states)
return hidden_states
def xformers_forward(self, hidden_states, encoder_hidden_states=None, attn_mask=None):
if encoder_hidden_states is None:
encoder_hidden_states = hidden_states
q = self.to_q(hidden_states)
k = self.to_k(encoder_hidden_states)
v = self.to_v(encoder_hidden_states)
q = rearrange(q, "b f (n d) -> (b n) f d", n=self.num_heads)
k = rearrange(k, "b f (n d) -> (b n) f d", n=self.num_heads)
v = rearrange(v, "b f (n d) -> (b n) f d", n=self.num_heads)
if attn_mask is not None:
hidden_states = low_version_attention(q, k, v, attn_bias=attn_mask)
else:
import xformers.ops as xops
hidden_states = xops.memory_efficient_attention(q, k, v)
hidden_states = rearrange(hidden_states, "(b n) f d -> b f (n d)", n=self.num_heads)
hidden_states = hidden_states.to(q.dtype)
hidden_states = self.to_out(hidden_states)
return hidden_states
def forward(self, hidden_states, encoder_hidden_states=None, attn_mask=None, ipadapter_kwargs=None, qkv_preprocessor=None):
return self.torch_forward(hidden_states, encoder_hidden_states=encoder_hidden_states, attn_mask=attn_mask, ipadapter_kwargs=ipadapter_kwargs, qkv_preprocessor=qkv_preprocessor)
class CLIPEncoderLayer(torch.nn.Module):
def __init__(self, embed_dim, intermediate_size, num_heads=12, head_dim=64, use_quick_gelu=True):
super().__init__()
self.attn = Attention(q_dim=embed_dim, num_heads=num_heads, head_dim=head_dim, bias_q=True, bias_kv=True, bias_out=True)
self.layer_norm1 = torch.nn.LayerNorm(embed_dim)
self.layer_norm2 = torch.nn.LayerNorm(embed_dim)
self.fc1 = torch.nn.Linear(embed_dim, intermediate_size)
self.fc2 = torch.nn.Linear(intermediate_size, embed_dim)
self.use_quick_gelu = use_quick_gelu
def quickGELU(self, x):
return x * torch.sigmoid(1.702 * x)
def forward(self, hidden_states, attn_mask=None):
residual = hidden_states
hidden_states = self.layer_norm1(hidden_states)
hidden_states = self.attn(hidden_states, attn_mask=attn_mask)
hidden_states = residual + hidden_states
residual = hidden_states
hidden_states = self.layer_norm2(hidden_states)
hidden_states = self.fc1(hidden_states)
if self.use_quick_gelu:
hidden_states = self.quickGELU(hidden_states)
else:
hidden_states = torch.nn.functional.gelu(hidden_states)
hidden_states = self.fc2(hidden_states)
hidden_states = residual + hidden_states
return hidden_states
class SDTextEncoder(torch.nn.Module):
def __init__(self, embed_dim=768, vocab_size=49408, max_position_embeddings=77, num_encoder_layers=12, encoder_intermediate_size=3072):
super().__init__()
# token_embedding
self.token_embedding = torch.nn.Embedding(vocab_size, embed_dim)
# position_embeds (This is a fixed tensor)
self.position_embeds = torch.nn.Parameter(torch.zeros(1, max_position_embeddings, embed_dim))
# encoders
self.encoders = torch.nn.ModuleList([CLIPEncoderLayer(embed_dim, encoder_intermediate_size) for _ in range(num_encoder_layers)])
# attn_mask
self.attn_mask = self.attention_mask(max_position_embeddings)
# final_layer_norm
self.final_layer_norm = torch.nn.LayerNorm(embed_dim)
def attention_mask(self, length):
mask = torch.empty(length, length)
mask.fill_(float("-inf"))
mask.triu_(1)
return mask
def forward(self, input_ids, clip_skip=1):
embeds = self.token_embedding(input_ids) + self.position_embeds
attn_mask = self.attn_mask.to(device=embeds.device, dtype=embeds.dtype)
for encoder_id, encoder in enumerate(self.encoders):
embeds = encoder(embeds, attn_mask=attn_mask)
if encoder_id + clip_skip == len(self.encoders):
break
embeds = self.final_layer_norm(embeds)
return embeds
@staticmethod
def state_dict_converter():
return SDTextEncoderStateDictConverter()
class SDTextEncoderStateDictConverter:
def __init__(self):
pass
def from_diffusers(self, state_dict):
rename_dict = {
"text_model.embeddings.token_embedding.weight": "token_embedding.weight",
"text_model.embeddings.position_embedding.weight": "position_embeds",
"text_model.final_layer_norm.weight": "final_layer_norm.weight",
"text_model.final_layer_norm.bias": "final_layer_norm.bias"
}
attn_rename_dict = {
"self_attn.q_proj": "attn.to_q",
"self_attn.k_proj": "attn.to_k",
"self_attn.v_proj": "attn.to_v",
"self_attn.out_proj": "attn.to_out",
"layer_norm1": "layer_norm1",
"layer_norm2": "layer_norm2",
"mlp.fc1": "fc1",
"mlp.fc2": "fc2",
}
state_dict_ = {}
for name in state_dict:
if name in rename_dict:
param = state_dict[name]
if name == "text_model.embeddings.position_embedding.weight":
param = param.reshape((1, param.shape[0], param.shape[1]))
state_dict_[rename_dict[name]] = param
elif name.startswith("text_model.encoder.layers."):
param = state_dict[name]
names = name.split(".")
layer_id, layer_type, tail = names[3], ".".join(names[4:-1]), names[-1]
name_ = ".".join(["encoders", layer_id, attn_rename_dict[layer_type], tail])
state_dict_[name_] = param
return state_dict_
def from_civitai(self, state_dict):
rename_dict = {
"cond_stage_model.transformer.text_model.embeddings.token_embedding.weight": "token_embedding.weight",
"cond_stage_model.transformer.text_model.encoder.layers.0.layer_norm1.bias": "encoders.0.layer_norm1.bias",
"cond_stage_model.transformer.text_model.encoder.layers.0.layer_norm1.weight": "encoders.0.layer_norm1.weight",
"cond_stage_model.transformer.text_model.encoder.layers.0.layer_norm2.bias": "encoders.0.layer_norm2.bias",
"cond_stage_model.transformer.text_model.encoder.layers.0.layer_norm2.weight": "encoders.0.layer_norm2.weight",
"cond_stage_model.transformer.text_model.encoder.layers.0.mlp.fc1.bias": "encoders.0.fc1.bias",
"cond_stage_model.transformer.text_model.encoder.layers.0.mlp.fc1.weight": "encoders.0.fc1.weight",
"cond_stage_model.transformer.text_model.encoder.layers.0.mlp.fc2.bias": "encoders.0.fc2.bias",
"cond_stage_model.transformer.text_model.encoder.layers.0.mlp.fc2.weight": "encoders.0.fc2.weight",
"cond_stage_model.transformer.text_model.encoder.layers.0.self_attn.k_proj.bias": "encoders.0.attn.to_k.bias",
"cond_stage_model.transformer.text_model.encoder.layers.0.self_attn.k_proj.weight": "encoders.0.attn.to_k.weight",
"cond_stage_model.transformer.text_model.encoder.layers.0.self_attn.out_proj.bias": "encoders.0.attn.to_out.bias",
"cond_stage_model.transformer.text_model.encoder.layers.0.self_attn.out_proj.weight": "encoders.0.attn.to_out.weight",
"cond_stage_model.transformer.text_model.encoder.layers.0.self_attn.q_proj.bias": "encoders.0.attn.to_q.bias",
"cond_stage_model.transformer.text_model.encoder.layers.0.self_attn.q_proj.weight": "encoders.0.attn.to_q.weight",
"cond_stage_model.transformer.text_model.encoder.layers.0.self_attn.v_proj.bias": "encoders.0.attn.to_v.bias",
"cond_stage_model.transformer.text_model.encoder.layers.0.self_attn.v_proj.weight": "encoders.0.attn.to_v.weight",
"cond_stage_model.transformer.text_model.encoder.layers.1.layer_norm1.bias": "encoders.1.layer_norm1.bias",
"cond_stage_model.transformer.text_model.encoder.layers.1.layer_norm1.weight": "encoders.1.layer_norm1.weight",
"cond_stage_model.transformer.text_model.encoder.layers.1.layer_norm2.bias": "encoders.1.layer_norm2.bias",
"cond_stage_model.transformer.text_model.encoder.layers.1.layer_norm2.weight": "encoders.1.layer_norm2.weight",
"cond_stage_model.transformer.text_model.encoder.layers.1.mlp.fc1.bias": "encoders.1.fc1.bias",
"cond_stage_model.transformer.text_model.encoder.layers.1.mlp.fc1.weight": "encoders.1.fc1.weight",
"cond_stage_model.transformer.text_model.encoder.layers.1.mlp.fc2.bias": "encoders.1.fc2.bias",
"cond_stage_model.transformer.text_model.encoder.layers.1.mlp.fc2.weight": "encoders.1.fc2.weight",
"cond_stage_model.transformer.text_model.encoder.layers.1.self_attn.k_proj.bias": "encoders.1.attn.to_k.bias",
"cond_stage_model.transformer.text_model.encoder.layers.1.self_attn.k_proj.weight": "encoders.1.attn.to_k.weight",
"cond_stage_model.transformer.text_model.encoder.layers.1.self_attn.out_proj.bias": "encoders.1.attn.to_out.bias",
"cond_stage_model.transformer.text_model.encoder.layers.1.self_attn.out_proj.weight": "encoders.1.attn.to_out.weight",
"cond_stage_model.transformer.text_model.encoder.layers.1.self_attn.q_proj.bias": "encoders.1.attn.to_q.bias",
"cond_stage_model.transformer.text_model.encoder.layers.1.self_attn.q_proj.weight": "encoders.1.attn.to_q.weight",
"cond_stage_model.transformer.text_model.encoder.layers.1.self_attn.v_proj.bias": "encoders.1.attn.to_v.bias",
"cond_stage_model.transformer.text_model.encoder.layers.1.self_attn.v_proj.weight": "encoders.1.attn.to_v.weight",
"cond_stage_model.transformer.text_model.encoder.layers.10.layer_norm1.bias": "encoders.10.layer_norm1.bias",
"cond_stage_model.transformer.text_model.encoder.layers.10.layer_norm1.weight": "encoders.10.layer_norm1.weight",
"cond_stage_model.transformer.text_model.encoder.layers.10.layer_norm2.bias": "encoders.10.layer_norm2.bias",
"cond_stage_model.transformer.text_model.encoder.layers.10.layer_norm2.weight": "encoders.10.layer_norm2.weight",
"cond_stage_model.transformer.text_model.encoder.layers.10.mlp.fc1.bias": "encoders.10.fc1.bias",
"cond_stage_model.transformer.text_model.encoder.layers.10.mlp.fc1.weight": "encoders.10.fc1.weight",
"cond_stage_model.transformer.text_model.encoder.layers.10.mlp.fc2.bias": "encoders.10.fc2.bias",
"cond_stage_model.transformer.text_model.encoder.layers.10.mlp.fc2.weight": "encoders.10.fc2.weight",
"cond_stage_model.transformer.text_model.encoder.layers.10.self_attn.k_proj.bias": "encoders.10.attn.to_k.bias",
"cond_stage_model.transformer.text_model.encoder.layers.10.self_attn.k_proj.weight": "encoders.10.attn.to_k.weight",
"cond_stage_model.transformer.text_model.encoder.layers.10.self_attn.out_proj.bias": "encoders.10.attn.to_out.bias",
"cond_stage_model.transformer.text_model.encoder.layers.10.self_attn.out_proj.weight": "encoders.10.attn.to_out.weight",
"cond_stage_model.transformer.text_model.encoder.layers.10.self_attn.q_proj.bias": "encoders.10.attn.to_q.bias",
"cond_stage_model.transformer.text_model.encoder.layers.10.self_attn.q_proj.weight": "encoders.10.attn.to_q.weight",
"cond_stage_model.transformer.text_model.encoder.layers.10.self_attn.v_proj.bias": "encoders.10.attn.to_v.bias",
"cond_stage_model.transformer.text_model.encoder.layers.10.self_attn.v_proj.weight": "encoders.10.attn.to_v.weight",
"cond_stage_model.transformer.text_model.encoder.layers.11.layer_norm1.bias": "encoders.11.layer_norm1.bias",
"cond_stage_model.transformer.text_model.encoder.layers.11.layer_norm1.weight": "encoders.11.layer_norm1.weight",
"cond_stage_model.transformer.text_model.encoder.layers.11.layer_norm2.bias": "encoders.11.layer_norm2.bias",
"cond_stage_model.transformer.text_model.encoder.layers.11.layer_norm2.weight": "encoders.11.layer_norm2.weight",
"cond_stage_model.transformer.text_model.encoder.layers.11.mlp.fc1.bias": "encoders.11.fc1.bias",
"cond_stage_model.transformer.text_model.encoder.layers.11.mlp.fc1.weight": "encoders.11.fc1.weight",
"cond_stage_model.transformer.text_model.encoder.layers.11.mlp.fc2.bias": "encoders.11.fc2.bias",
"cond_stage_model.transformer.text_model.encoder.layers.11.mlp.fc2.weight": "encoders.11.fc2.weight",
"cond_stage_model.transformer.text_model.encoder.layers.11.self_attn.k_proj.bias": "encoders.11.attn.to_k.bias",
"cond_stage_model.transformer.text_model.encoder.layers.11.self_attn.k_proj.weight": "encoders.11.attn.to_k.weight",
"cond_stage_model.transformer.text_model.encoder.layers.11.self_attn.out_proj.bias": "encoders.11.attn.to_out.bias",
"cond_stage_model.transformer.text_model.encoder.layers.11.self_attn.out_proj.weight": "encoders.11.attn.to_out.weight",
"cond_stage_model.transformer.text_model.encoder.layers.11.self_attn.q_proj.bias": "encoders.11.attn.to_q.bias",
"cond_stage_model.transformer.text_model.encoder.layers.11.self_attn.q_proj.weight": "encoders.11.attn.to_q.weight",
"cond_stage_model.transformer.text_model.encoder.layers.11.self_attn.v_proj.bias": "encoders.11.attn.to_v.bias",
"cond_stage_model.transformer.text_model.encoder.layers.11.self_attn.v_proj.weight": "encoders.11.attn.to_v.weight",
"cond_stage_model.transformer.text_model.encoder.layers.2.layer_norm1.bias": "encoders.2.layer_norm1.bias",
"cond_stage_model.transformer.text_model.encoder.layers.2.layer_norm1.weight": "encoders.2.layer_norm1.weight",
"cond_stage_model.transformer.text_model.encoder.layers.2.layer_norm2.bias": "encoders.2.layer_norm2.bias",
"cond_stage_model.transformer.text_model.encoder.layers.2.layer_norm2.weight": "encoders.2.layer_norm2.weight",
"cond_stage_model.transformer.text_model.encoder.layers.2.mlp.fc1.bias": "encoders.2.fc1.bias",
"cond_stage_model.transformer.text_model.encoder.layers.2.mlp.fc1.weight": "encoders.2.fc1.weight",
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"cond_stage_model.transformer.text_model.encoder.layers.3.layer_norm2.bias": "encoders.3.layer_norm2.bias",
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"cond_stage_model.transformer.text_model.encoder.layers.3.mlp.fc1.bias": "encoders.3.fc1.bias",
"cond_stage_model.transformer.text_model.encoder.layers.3.mlp.fc1.weight": "encoders.3.fc1.weight",
"cond_stage_model.transformer.text_model.encoder.layers.3.mlp.fc2.bias": "encoders.3.fc2.bias",
"cond_stage_model.transformer.text_model.encoder.layers.3.mlp.fc2.weight": "encoders.3.fc2.weight",
"cond_stage_model.transformer.text_model.encoder.layers.3.self_attn.k_proj.bias": "encoders.3.attn.to_k.bias",
"cond_stage_model.transformer.text_model.encoder.layers.3.self_attn.k_proj.weight": "encoders.3.attn.to_k.weight",
"cond_stage_model.transformer.text_model.encoder.layers.3.self_attn.out_proj.bias": "encoders.3.attn.to_out.bias",
"cond_stage_model.transformer.text_model.encoder.layers.3.self_attn.out_proj.weight": "encoders.3.attn.to_out.weight",
"cond_stage_model.transformer.text_model.encoder.layers.3.self_attn.q_proj.bias": "encoders.3.attn.to_q.bias",
"cond_stage_model.transformer.text_model.encoder.layers.3.self_attn.q_proj.weight": "encoders.3.attn.to_q.weight",
"cond_stage_model.transformer.text_model.encoder.layers.3.self_attn.v_proj.bias": "encoders.3.attn.to_v.bias",
"cond_stage_model.transformer.text_model.encoder.layers.3.self_attn.v_proj.weight": "encoders.3.attn.to_v.weight",
"cond_stage_model.transformer.text_model.encoder.layers.4.layer_norm1.bias": "encoders.4.layer_norm1.bias",
"cond_stage_model.transformer.text_model.encoder.layers.4.layer_norm1.weight": "encoders.4.layer_norm1.weight",
"cond_stage_model.transformer.text_model.encoder.layers.4.layer_norm2.bias": "encoders.4.layer_norm2.bias",
"cond_stage_model.transformer.text_model.encoder.layers.4.layer_norm2.weight": "encoders.4.layer_norm2.weight",
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"cond_stage_model.transformer.text_model.encoder.layers.4.mlp.fc1.weight": "encoders.4.fc1.weight",
"cond_stage_model.transformer.text_model.encoder.layers.4.mlp.fc2.bias": "encoders.4.fc2.bias",
"cond_stage_model.transformer.text_model.encoder.layers.4.mlp.fc2.weight": "encoders.4.fc2.weight",
"cond_stage_model.transformer.text_model.encoder.layers.4.self_attn.k_proj.bias": "encoders.4.attn.to_k.bias",
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"cond_stage_model.transformer.text_model.final_layer_norm.bias": "final_layer_norm.bias",
"cond_stage_model.transformer.text_model.final_layer_norm.weight": "final_layer_norm.weight",
"cond_stage_model.transformer.text_model.embeddings.position_embedding.weight": "position_embeds"
}
state_dict_ = {}
for name in state_dict:
if name in rename_dict:
param = state_dict[name]
if name == "cond_stage_model.transformer.text_model.embeddings.position_embedding.weight":
param = param.reshape((1, param.shape[0], param.shape[1]))
state_dict_[rename_dict[name]] = param
return state_dict_
|