import torch
import torch.nn as nn
from comfy.ldm.modules.diffusionmodules.mmdit import (
TimestepEmbedder,
PatchEmbed,
)
from .poolers import AttentionPool
import comfy.latent_formats
from .models import HunYuanDiTBlock, calc_rope
class HunYuanControlNet(nn.Module):
"""
HunYuanDiT: Diffusion model with a Transformer backbone.
Inherit ModelMixin and ConfigMixin to be compatible with the sampler StableDiffusionPipeline of diffusers.
Inherit PeftAdapterMixin to be compatible with the PEFT training pipeline.
Parameters
----------
args: argparse.Namespace
The arguments parsed by argparse.
input_size: tuple
The size of the input image.
patch_size: int
The size of the patch.
in_channels: int
The number of input channels.
hidden_size: int
The hidden size of the transformer backbone.
depth: int
The number of transformer blocks.
num_heads: int
The number of attention heads.
mlp_ratio: float
The ratio of the hidden size of the MLP in the transformer block.
log_fn: callable
The logging function.
"""
def __init__(
self,
input_size: tuple = 128,
patch_size: int = 2,
in_channels: int = 4,
hidden_size: int = 1408,
depth: int = 40,
num_heads: int = 16,
mlp_ratio: float = 4.3637,
text_states_dim=1024,
text_states_dim_t5=2048,
text_len=77,
text_len_t5=256,
qk_norm=True, # See http://arxiv.org/abs/2302.05442 for details.
size_cond=False,
use_style_cond=False,
learn_sigma=True,
norm="layer",
log_fn: callable = print,
attn_precision=None,
dtype=None,
device=None,
operations=None,
**kwargs,
):
super().__init__()
self.log_fn = log_fn
self.depth = depth
self.learn_sigma = learn_sigma
self.in_channels = in_channels
self.out_channels = in_channels * 2 if learn_sigma else in_channels
self.patch_size = patch_size
self.num_heads = num_heads
self.hidden_size = hidden_size
self.text_states_dim = text_states_dim
self.text_states_dim_t5 = text_states_dim_t5
self.text_len = text_len
self.text_len_t5 = text_len_t5
self.size_cond = size_cond
self.use_style_cond = use_style_cond
self.norm = norm
self.dtype = dtype
self.latent_format = comfy.latent_formats.SDXL
self.mlp_t5 = nn.Sequential(
nn.Linear(
self.text_states_dim_t5,
self.text_states_dim_t5 * 4,
bias=True,
dtype=dtype,
device=device,
),
nn.SiLU(),
nn.Linear(
self.text_states_dim_t5 * 4,
self.text_states_dim,
bias=True,
dtype=dtype,
device=device,
),
)
# learnable replace
self.text_embedding_padding = nn.Parameter(
torch.randn(
self.text_len + self.text_len_t5,
self.text_states_dim,
dtype=dtype,
device=device,
)
)
# Attention pooling
pooler_out_dim = 1024
self.pooler = AttentionPool(
self.text_len_t5,
self.text_states_dim_t5,
num_heads=8,
output_dim=pooler_out_dim,
dtype=dtype,
device=device,
operations=operations,
)
# Dimension of the extra input vectors
self.extra_in_dim = pooler_out_dim
if self.size_cond:
# Image size and crop size conditions
self.extra_in_dim += 6 * 256
if self.use_style_cond:
# Here we use a default learned embedder layer for future extension.
self.style_embedder = nn.Embedding(
1, hidden_size, dtype=dtype, device=device
)
self.extra_in_dim += hidden_size
# Text embedding for `add`
self.x_embedder = PatchEmbed(
input_size,
patch_size,
in_channels,
hidden_size,
dtype=dtype,
device=device,
operations=operations,
)
self.t_embedder = TimestepEmbedder(
hidden_size, dtype=dtype, device=device, operations=operations
)
self.extra_embedder = nn.Sequential(
operations.Linear(
self.extra_in_dim, hidden_size * 4, dtype=dtype, device=device
),
nn.SiLU(),
operations.Linear(
hidden_size * 4, hidden_size, bias=True, dtype=dtype, device=device
),
)
# HUnYuanDiT Blocks
self.blocks = nn.ModuleList(
[
HunYuanDiTBlock(
hidden_size=hidden_size,
c_emb_size=hidden_size,
num_heads=num_heads,
mlp_ratio=mlp_ratio,
text_states_dim=self.text_states_dim,
qk_norm=qk_norm,
norm_type=self.norm,
skip=False,
attn_precision=attn_precision,
dtype=dtype,
device=device,
operations=operations,
)
for _ in range(19)
]
)
# Input zero linear for the first block
self.before_proj = operations.Linear(self.hidden_size, self.hidden_size, dtype=dtype, device=device)
# Output zero linear for the every block
self.after_proj_list = nn.ModuleList(
[
operations.Linear(
self.hidden_size, self.hidden_size, dtype=dtype, device=device
)
for _ in range(len(self.blocks))
]
)
def forward(
self,
x,
hint,
timesteps,
context,#encoder_hidden_states=None,
text_embedding_mask=None,
encoder_hidden_states_t5=None,
text_embedding_mask_t5=None,
image_meta_size=None,
style=None,
return_dict=False,
**kwarg,
):
"""
Forward pass of the encoder.
Parameters
----------
x: torch.Tensor
(B, D, H, W)
t: torch.Tensor
(B)
encoder_hidden_states: torch.Tensor
CLIP text embedding, (B, L_clip, D)
text_embedding_mask: torch.Tensor
CLIP text embedding mask, (B, L_clip)
encoder_hidden_states_t5: torch.Tensor
T5 text embedding, (B, L_t5, D)
text_embedding_mask_t5: torch.Tensor
T5 text embedding mask, (B, L_t5)
image_meta_size: torch.Tensor
(B, 6)
style: torch.Tensor
(B)
cos_cis_img: torch.Tensor
sin_cis_img: torch.Tensor
return_dict: bool
Whether to return a dictionary.
"""
condition = hint
if condition.shape[0] == 1:
condition = torch.repeat_interleave(condition, x.shape[0], dim=0)
text_states = context # 2,77,1024
text_states_t5 = encoder_hidden_states_t5 # 2,256,2048
text_states_mask = text_embedding_mask.bool() # 2,77
text_states_t5_mask = text_embedding_mask_t5.bool() # 2,256
b_t5, l_t5, c_t5 = text_states_t5.shape
text_states_t5 = self.mlp_t5(text_states_t5.view(-1, c_t5)).view(b_t5, l_t5, -1)
padding = comfy.ops.cast_to_input(self.text_embedding_padding, text_states)
text_states[:, -self.text_len :] = torch.where(
text_states_mask[:, -self.text_len :].unsqueeze(2),
text_states[:, -self.text_len :],
padding[: self.text_len],
)
text_states_t5[:, -self.text_len_t5 :] = torch.where(
text_states_t5_mask[:, -self.text_len_t5 :].unsqueeze(2),
text_states_t5[:, -self.text_len_t5 :],
padding[self.text_len :],
)
text_states = torch.cat([text_states, text_states_t5], dim=1) # 2,205，1024
# _, _, oh, ow = x.shape
# th, tw = oh // self.patch_size, ow // self.patch_size
# Get image RoPE embedding according to `reso`lution.
freqs_cis_img = calc_rope(
x, self.patch_size, self.hidden_size // self.num_heads
) # (cos_cis_img, sin_cis_img)
# ========================= Build time and image embedding =========================
t = self.t_embedder(timesteps, dtype=self.dtype)
x = self.x_embedder(x)
# ========================= Concatenate all extra vectors =========================
# Build text tokens with pooling
extra_vec = self.pooler(encoder_hidden_states_t5)
# Build image meta size tokens if applicable
# if image_meta_size is not None:
# image_meta_size = timestep_embedding(image_meta_size.view(-1), 256) # [B * 6, 256]
# if image_meta_size.dtype != self.dtype:
# image_meta_size = image_meta_size.half()
# image_meta_size = image_meta_size.view(-1, 6 * 256)
# extra_vec = torch.cat([extra_vec, image_meta_size], dim=1) # [B, D + 6 * 256]
# Build style tokens
if style is not None:
style_embedding = self.style_embedder(style)
extra_vec = torch.cat([extra_vec, style_embedding], dim=1)
# Concatenate all extra vectors
c = t + self.extra_embedder(extra_vec) # [B, D]
# ========================= Deal with Condition =========================
condition = self.x_embedder(condition)
# ========================= Forward pass through HunYuanDiT blocks =========================
controls = []
x = x + self.before_proj(condition) # add condition
for layer, block in enumerate(self.blocks):
x = block(x, c, text_states, freqs_cis_img)
controls.append(self.after_proj_list[layer](x)) # zero linear for output
return {"output": controls}