mirror of
https://github.com/modelscope/DiffSynth-Studio.git
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95 lines
3.6 KiB
Python
95 lines
3.6 KiB
Python
from .svd_image_encoder import SVDImageEncoder
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from .sd3_dit import RMSNorm
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from transformers import CLIPImageProcessor
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import torch
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class MLPProjModel(torch.nn.Module):
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def __init__(self, cross_attention_dim=768, id_embeddings_dim=512, num_tokens=4):
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super().__init__()
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self.cross_attention_dim = cross_attention_dim
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self.num_tokens = num_tokens
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self.proj = torch.nn.Sequential(
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torch.nn.Linear(id_embeddings_dim, id_embeddings_dim*2),
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torch.nn.GELU(),
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torch.nn.Linear(id_embeddings_dim*2, cross_attention_dim*num_tokens),
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)
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self.norm = torch.nn.LayerNorm(cross_attention_dim)
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def forward(self, id_embeds):
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x = self.proj(id_embeds)
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x = x.reshape(-1, self.num_tokens, self.cross_attention_dim)
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x = self.norm(x)
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return x
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class IpAdapterModule(torch.nn.Module):
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def __init__(self, num_attention_heads, attention_head_dim, input_dim):
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super().__init__()
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self.num_heads = num_attention_heads
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self.head_dim = attention_head_dim
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output_dim = num_attention_heads * attention_head_dim
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self.to_k_ip = torch.nn.Linear(input_dim, output_dim, bias=False)
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self.to_v_ip = torch.nn.Linear(input_dim, output_dim, bias=False)
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self.norm_added_k = RMSNorm(attention_head_dim, eps=1e-5, elementwise_affine=False)
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def forward(self, hidden_states):
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batch_size = hidden_states.shape[0]
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# ip_k
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ip_k = self.to_k_ip(hidden_states)
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ip_k = ip_k.view(batch_size, -1, self.num_heads, self.head_dim).transpose(1, 2)
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ip_k = self.norm_added_k(ip_k)
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# ip_v
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ip_v = self.to_v_ip(hidden_states)
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ip_v = ip_v.view(batch_size, -1, self.num_heads, self.head_dim).transpose(1, 2)
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return ip_k, ip_v
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class FluxIpAdapter(torch.nn.Module):
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def __init__(self, num_attention_heads=24, attention_head_dim=128, cross_attention_dim=4096, num_tokens=128, num_blocks=57):
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super().__init__()
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self.ipadapter_modules = torch.nn.ModuleList([IpAdapterModule(num_attention_heads, attention_head_dim, cross_attention_dim) for _ in range(num_blocks)])
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self.image_proj = MLPProjModel(cross_attention_dim=cross_attention_dim, id_embeddings_dim=1152, num_tokens=num_tokens)
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self.set_adapter()
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def set_adapter(self):
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self.call_block_id = {i:i for i in range(len(self.ipadapter_modules))}
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def forward(self, hidden_states, scale=1.0):
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hidden_states = self.image_proj(hidden_states)
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hidden_states = hidden_states.view(1, -1, hidden_states.shape[-1])
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ip_kv_dict = {}
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for block_id in self.call_block_id:
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ipadapter_id = self.call_block_id[block_id]
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ip_k, ip_v = self.ipadapter_modules[ipadapter_id](hidden_states)
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ip_kv_dict[block_id] = {
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"ip_k": ip_k,
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"ip_v": ip_v,
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"scale": scale
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}
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return ip_kv_dict
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@staticmethod
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def state_dict_converter():
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return FluxIpAdapterStateDictConverter()
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class FluxIpAdapterStateDictConverter:
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def __init__(self):
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pass
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def from_diffusers(self, state_dict):
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state_dict_ = {}
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for name in state_dict["ip_adapter"]:
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name_ = 'ipadapter_modules.' + name
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state_dict_[name_] = state_dict["ip_adapter"][name]
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for name in state_dict["image_proj"]:
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name_ = "image_proj." + name
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state_dict_[name_] = state_dict["image_proj"][name]
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return state_dict_
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def from_civitai(self, state_dict):
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return self.from_diffusers(state_dict)
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