#!/usr/bin/env python
# -*- coding: UTF-8 -*-
'''
@Project ：EchoMimic
@File ：unet_3d_echo.py
@Author ：juzhen.czy
@Date ：2024/3/4 17:50
'''
# Adapted from https://github.com/guoyww/AnimateDiff/blob/main/animatediff/models/unet_blocks.py
from collections import OrderedDict
from dataclasses import dataclass
from os import PathLike
from pathlib import Path
from typing import Dict, List, Optional, Tuple, Union
import torch
import torch.nn as nn
import torch.utils.checkpoint
from diffusers.configuration_utils import ConfigMixin, register_to_config
from diffusers.models.attention_processor import AttentionProcessor
from diffusers.models.embeddings import TimestepEmbedding, Timesteps
from diffusers.models.modeling_utils import ModelMixin
from diffusers.utils import SAFETENSORS_WEIGHTS_NAME, WEIGHTS_NAME, BaseOutput, logging
from safetensors.torch import load_file
from .resnet import InflatedConv3d, InflatedGroupNorm
from .unet_3d_blocks import UNetMidBlock3DCrossAttn, get_down_block, get_up_block
logger = logging.get_logger(__name__) # pylint: disable=invalid-name
@dataclass
class UNet3DConditionOutput(BaseOutput):
sample: torch.FloatTensor
class EchoUNet3DConditionModel(ModelMixin, ConfigMixin):
_supports_gradient_checkpointing = True
@register_to_config
def __init__(
self,
sample_size: Optional[int] = None,
in_channels: int = 4,
out_channels: int = 4,
center_input_sample: bool = False,
flip_sin_to_cos: bool = True,
freq_shift: int = 0,
down_block_types: Tuple[str] = (
"CrossAttnDownBlock3D",
"CrossAttnDownBlock3D",
"CrossAttnDownBlock3D",
"DownBlock3D",
),
mid_block_type: str = "UNetMidBlock3DCrossAttn",
up_block_types: Tuple[str] = (
"UpBlock3D",
"CrossAttnUpBlock3D",
"CrossAttnUpBlock3D",
"CrossAttnUpBlock3D",
),
only_cross_attention: Union[bool, Tuple[bool]] = False,
block_out_channels: Tuple[int] = (320, 640, 1280, 1280),
layers_per_block: int = 2,
downsample_padding: int = 1,
mid_block_scale_factor: float = 1,
act_fn: str = "silu",
norm_num_groups: int = 32,
norm_eps: float = 1e-5,
cross_attention_dim: int = 1280,
attention_head_dim: Union[int, Tuple[int]] = 8,
dual_cross_attention: bool = False,
use_linear_projection: bool = False,
class_embed_type: Optional[str] = None,
num_class_embeds: Optional[int] = None,
upcast_attention: bool = False,
resnet_time_scale_shift: str = "default",
use_inflated_groupnorm=False,
# Additional
use_motion_module=False,
motion_module_resolutions=(1, 2, 4, 8),
motion_module_mid_block=False,
motion_module_decoder_only=False,
motion_module_type=None,
motion_module_kwargs={},
unet_use_cross_frame_attention=None,
unet_use_temporal_attention=None,
):
super().__init__()
self.sample_size = sample_size
time_embed_dim = block_out_channels[0] * 4
# input
self.conv_in = InflatedConv3d(
in_channels, block_out_channels[0], kernel_size=3, padding=(1, 1)
)
# time
self.time_proj = Timesteps(block_out_channels[0], flip_sin_to_cos, freq_shift)
timestep_input_dim = block_out_channels[0]
self.time_embedding = TimestepEmbedding(timestep_input_dim, time_embed_dim)
# class embedding
if class_embed_type is None and num_class_embeds is not None:
self.class_embedding = nn.Embedding(num_class_embeds, time_embed_dim)
elif class_embed_type == "timestep":
self.class_embedding = TimestepEmbedding(timestep_input_dim, time_embed_dim)
elif class_embed_type == "identity":
self.class_embedding = nn.Identity(time_embed_dim, time_embed_dim)
else:
self.class_embedding = None
self.down_blocks = nn.ModuleList([])
self.mid_block = None
self.up_blocks = nn.ModuleList([])
if isinstance(only_cross_attention, bool):
only_cross_attention = [only_cross_attention] * len(down_block_types)
if isinstance(attention_head_dim, int):
attention_head_dim = (attention_head_dim,) * len(down_block_types)
# down
output_channel = block_out_channels[0]
for i, down_block_type in enumerate(down_block_types):
res = 2**i
input_channel = output_channel
output_channel = block_out_channels[i]
is_final_block = i == len(block_out_channels) - 1
down_block = get_down_block(
down_block_type,
num_layers=layers_per_block,
in_channels=input_channel,
out_channels=output_channel,
temb_channels=time_embed_dim,
add_downsample=not is_final_block,
resnet_eps=norm_eps,
resnet_act_fn=act_fn,
resnet_groups=norm_num_groups,
cross_attention_dim=cross_attention_dim,
attn_num_head_channels=attention_head_dim[i],
downsample_padding=downsample_padding,
dual_cross_attention=dual_cross_attention,
use_linear_projection=use_linear_projection,
only_cross_attention=only_cross_attention[i],
upcast_attention=upcast_attention,
resnet_time_scale_shift=resnet_time_scale_shift,
unet_use_cross_frame_attention=unet_use_cross_frame_attention,
unet_use_temporal_attention=unet_use_temporal_attention,
use_inflated_groupnorm=use_inflated_groupnorm,
use_motion_module=use_motion_module
and (res in motion_module_resolutions)
and (not motion_module_decoder_only),
motion_module_type=motion_module_type,
motion_module_kwargs=motion_module_kwargs,
)
self.down_blocks.append(down_block)
# mid
if mid_block_type == "UNetMidBlock3DCrossAttn":
self.mid_block = UNetMidBlock3DCrossAttn(
in_channels=block_out_channels[-1],
temb_channels=time_embed_dim,
resnet_eps=norm_eps,
resnet_act_fn=act_fn,
output_scale_factor=mid_block_scale_factor,
resnet_time_scale_shift=resnet_time_scale_shift,
cross_attention_dim=cross_attention_dim,
attn_num_head_channels=attention_head_dim[-1],
resnet_groups=norm_num_groups,
dual_cross_attention=dual_cross_attention,
use_linear_projection=use_linear_projection,
upcast_attention=upcast_attention,
unet_use_cross_frame_attention=unet_use_cross_frame_attention,
unet_use_temporal_attention=unet_use_temporal_attention,
use_inflated_groupnorm=use_inflated_groupnorm,
use_motion_module=use_motion_module and motion_module_mid_block,
motion_module_type=motion_module_type,
motion_module_kwargs=motion_module_kwargs,
)
else:
raise ValueError(f"unknown mid_block_type : {mid_block_type}")
self.unet_use_temporal_attention = unet_use_temporal_attention
# count how many layers upsample the videos
self.num_upsamplers = 0
# up
reversed_block_out_channels = list(reversed(block_out_channels))
reversed_attention_head_dim = list(reversed(attention_head_dim))
only_cross_attention = list(reversed(only_cross_attention))
output_channel = reversed_block_out_channels[0]
for i, up_block_type in enumerate(up_block_types):
res = 2 ** (3 - i)
is_final_block = i == len(block_out_channels) - 1
prev_output_channel = output_channel
output_channel = reversed_block_out_channels[i]
input_channel = reversed_block_out_channels[
min(i + 1, len(block_out_channels) - 1)
]
# add upsample block for all BUT final layer
if not is_final_block:
add_upsample = True
self.num_upsamplers += 1
else:
add_upsample = False
up_block = get_up_block(
up_block_type,
num_layers=layers_per_block + 1,
in_channels=input_channel,
out_channels=output_channel,
prev_output_channel=prev_output_channel,
temb_channels=time_embed_dim,
add_upsample=add_upsample,
resnet_eps=norm_eps,
resnet_act_fn=act_fn,
resnet_groups=norm_num_groups,
cross_attention_dim=cross_attention_dim,
attn_num_head_channels=reversed_attention_head_dim[i],
dual_cross_attention=dual_cross_attention,
use_linear_projection=use_linear_projection,
only_cross_attention=only_cross_attention[i],
upcast_attention=upcast_attention,
resnet_time_scale_shift=resnet_time_scale_shift,
unet_use_cross_frame_attention=unet_use_cross_frame_attention,
unet_use_temporal_attention=unet_use_temporal_attention,
use_inflated_groupnorm=use_inflated_groupnorm,
use_motion_module=use_motion_module
and (res in motion_module_resolutions),
motion_module_type=motion_module_type,
motion_module_kwargs=motion_module_kwargs,
)
self.up_blocks.append(up_block)
prev_output_channel = output_channel
# out
if use_inflated_groupnorm:
self.conv_norm_out = InflatedGroupNorm(
num_channels=block_out_channels[0],
num_groups=norm_num_groups,
eps=norm_eps,
)
else:
self.conv_norm_out = nn.GroupNorm(
num_channels=block_out_channels[0],
num_groups=norm_num_groups,
eps=norm_eps,
)
self.conv_act = nn.SiLU()
self.conv_out = InflatedConv3d(
block_out_channels[0], out_channels, kernel_size=3, padding=1
)
@property
# Copied from diffusers.models.unet_2d_condition.UNet2DConditionModel.attn_processors
def attn_processors(self) -> Dict[str, AttentionProcessor]:
r"""
Returns:
`dict` of attention processors: A dictionary containing all attention processors used in the model with
indexed by its weight name.
"""
# set recursively
processors = {}
def fn_recursive_add_processors(
name: str,
module: torch.nn.Module,
processors: Dict[str, AttentionProcessor],
):
if hasattr(module, "set_processor"):
processors[f"{name}.processor"] = module.processor
for sub_name, child in module.named_children():
if "temporal_transformer" not in sub_name:
fn_recursive_add_processors(f"{name}.{sub_name}", child, processors)
return processors
for name, module in self.named_children():
if "temporal_transformer" not in name:
fn_recursive_add_processors(name, module, processors)
return processors
def set_attention_slice(self, slice_size):
r"""
Enable sliced attention computation.
When this option is enabled, the attention module will split the input tensor in slices, to compute attention
in several steps. This is useful to save some memory in exchange for a small speed decrease.
Args:
slice_size (`str` or `int` or `list(int)`, *optional*, defaults to `"auto"`):
When `"auto"`, halves the input to the attention heads, so attention will be computed in two steps. If
`"max"`, maxium amount of memory will be saved by running only one slice at a time. If a number is
provided, uses as many slices as `attention_head_dim // slice_size`. In this case, `attention_head_dim`
must be a multiple of `slice_size`.
"""
sliceable_head_dims = []
def fn_recursive_retrieve_slicable_dims(module: torch.nn.Module):
if hasattr(module, "set_attention_slice"):
sliceable_head_dims.append(module.sliceable_head_dim)
for child in module.children():
fn_recursive_retrieve_slicable_dims(child)
# retrieve number of attention layers
for module in self.children():
fn_recursive_retrieve_slicable_dims(module)
num_slicable_layers = len(sliceable_head_dims)
if slice_size == "auto":
# half the attention head size is usually a good trade-off between
# speed and memory
slice_size = [dim // 2 for dim in sliceable_head_dims]
elif slice_size == "max":
# make smallest slice possible
slice_size = num_slicable_layers * [1]
slice_size = (
num_slicable_layers * [slice_size]
if not isinstance(slice_size, list)
else slice_size
)
if len(slice_size) != len(sliceable_head_dims):
raise ValueError(
f"You have provided {len(slice_size)}, but {self.config} has {len(sliceable_head_dims)} different"
f" attention layers. Make sure to match `len(slice_size)` to be {len(sliceable_head_dims)}."
)
for i in range(len(slice_size)):
size = slice_size[i]
dim = sliceable_head_dims[i]
if size is not None and size > dim:
raise ValueError(f"size {size} has to be smaller or equal to {dim}.")
# Recursively walk through all the children.
# Any children which exposes the set_attention_slice method
# gets the message
def fn_recursive_set_attention_slice(
module: torch.nn.Module, slice_size: List[int]
):
if hasattr(module, "set_attention_slice"):
module.set_attention_slice(slice_size.pop())
for child in module.children():
fn_recursive_set_attention_slice(child, slice_size)
reversed_slice_size = list(reversed(slice_size))
for module in self.children():
fn_recursive_set_attention_slice(module, reversed_slice_size)
def _set_gradient_checkpointing(self, module, value=False):
if hasattr(module, "gradient_checkpointing"):
module.gradient_checkpointing = value
# Copied from diffusers.models.unet_2d_condition.UNet2DConditionModel.set_attn_processor
def set_attn_processor(
self, processor: Union[AttentionProcessor, Dict[str, AttentionProcessor]]
):
r"""
Sets the attention processor to use to compute attention.
Parameters:
processor (`dict` of `AttentionProcessor` or only `AttentionProcessor`):
The instantiated processor class or a dictionary of processor classes that will be set as the processor
for **all** `Attention` layers.
If `processor` is a dict, the key needs to define the path to the corresponding cross attention
processor. This is strongly recommended when setting trainable attention processors.
"""
count = len(self.attn_processors.keys())
if isinstance(processor, dict) and len(processor) != count:
raise ValueError(
f"A dict of processors was passed, but the number of processors {len(processor)} does not match the"
f" number of attention layers: {count}. Please make sure to pass {count} processor classes."
)
def fn_recursive_attn_processor(name: str, module: torch.nn.Module, processor):
if hasattr(module, "set_processor"):
if not isinstance(processor, dict):
module.set_processor(processor)
else:
module.set_processor(processor.pop(f"{name}.processor"))
for sub_name, child in module.named_children():
if "temporal_transformer" not in sub_name:
fn_recursive_attn_processor(f"{name}.{sub_name}", child, processor)
for name, module in self.named_children():
if "temporal_transformer" not in name:
fn_recursive_attn_processor(name, module, processor)
def forward(
self,
sample: torch.FloatTensor,
timestep: Union[torch.Tensor, float, int],
encoder_hidden_states: torch.Tensor,
class_labels: Optional[torch.Tensor] = None,
audio_cond_fea: Optional[torch.Tensor] = None,
attention_mask: Optional[torch.Tensor] = None,
face_musk_fea: Optional[torch.Tensor] = None,
down_block_additional_residuals: Optional[Tuple[torch.Tensor]] = None,
mid_block_additional_residual: Optional[torch.Tensor] = None,
return_dict: bool = True,
) -> Union[UNet3DConditionOutput, Tuple]:
r"""
Args:
sample (`torch.FloatTensor`): (batch, channel, height, width) noisy inputs tensor
timestep (`torch.FloatTensor` or `float` or `int`): (batch) timesteps
encoder_hidden_states (`torch.FloatTensor`): (batch, sequence_length, feature_dim) encoder hidden states
return_dict (`bool`, *optional*, defaults to `True`):
Whether or not to return a [`models.unet_2d_condition.UNet2DConditionOutput`] instead of a plain tuple.
Returns:
[`~models.unet_2d_condition.UNet2DConditionOutput`] or `tuple`:
[`~models.unet_2d_condition.UNet2DConditionOutput`] if `return_dict` is True, otherwise a `tuple`. When
returning a tuple, the first element is the sample tensor.
"""
# By default samples have to be AT least a multiple of the overall upsampling factor.
# The overall upsampling factor is equal to 2 ** (# num of upsampling layears).
# However, the upsampling interpolation output size can be forced to fit any upsampling size
# on the fly if necessary.
default_overall_up_factor = 2**self.num_upsamplers
# upsample size should be forwarded when sample is not a multiple of `default_overall_up_factor`
forward_upsample_size = False
upsample_size = None
if any(s % default_overall_up_factor != 0 for s in sample.shape[-2:]):
logger.info("Forward upsample size to force interpolation output size.")
forward_upsample_size = True
# prepare attention_mask
if attention_mask is not None:
attention_mask = (1 - attention_mask.to(sample.dtype)) * -10000.0
attention_mask = attention_mask.unsqueeze(1)
# center input if necessary
if self.config.center_input_sample:
sample = 2 * sample - 1.0
# time
timesteps = timestep
if not torch.is_tensor(timesteps):
# This would be a good case for the `match` statement (Python 3.10+)
is_mps = sample.device.type == "mps"
if isinstance(timestep, float):
dtype = torch.float32 if is_mps else torch.float64
else:
dtype = torch.int32 if is_mps else torch.int64
timesteps = torch.tensor([timesteps], dtype=dtype, device=sample.device)
elif len(timesteps.shape) == 0:
timesteps = timesteps[None].to(sample.device)
# broadcast to batch dimension in a way that's compatible with ONNX/Core ML
timesteps = timesteps.expand(sample.shape[0])
t_emb = self.time_proj(timesteps)
# timesteps does not contain any weights and will always return f32 tensors
# but time_embedding might actually be running in fp16. so we need to cast here.
# there might be better ways to encapsulate this.
t_emb = t_emb.to(dtype=self.dtype)
emb = self.time_embedding(t_emb)
if self.class_embedding is not None:
if class_labels is None:
raise ValueError(
"class_labels should be provided when num_class_embeds > 0"
)
if self.config.class_embed_type == "timestep":
class_labels = self.time_proj(class_labels)
class_emb = self.class_embedding(class_labels).to(dtype=self.dtype)
emb = emb + class_emb
# pre-process
sample = self.conv_in(sample)
if face_musk_fea is not None:
# print(sample.shape, face_musk_fea.shape)
sample = sample + face_musk_fea
# down
down_block_res_samples = (sample,)
for downsample_block in self.down_blocks:
if (
hasattr(downsample_block, "has_cross_attention")
and downsample_block.has_cross_attention
):
sample, res_samples = downsample_block(
hidden_states=sample,
temb=emb,
encoder_hidden_states=encoder_hidden_states,
audio_cond_fea=audio_cond_fea,
attention_mask=attention_mask,
)
else:
sample, res_samples = downsample_block(
hidden_states=sample,
temb=emb,
encoder_hidden_states=encoder_hidden_states,
)
down_block_res_samples += res_samples
if down_block_additional_residuals is not None:
new_down_block_res_samples = ()
for down_block_res_sample, down_block_additional_residual in zip(
down_block_res_samples, down_block_additional_residuals
):
down_block_res_sample = (
down_block_res_sample + down_block_additional_residual
)
new_down_block_res_samples += (down_block_res_sample,)
down_block_res_samples = new_down_block_res_samples
# mid
sample = self.mid_block(
sample,
emb,
encoder_hidden_states=encoder_hidden_states,
audio_cond_fea=audio_cond_fea,
attention_mask=attention_mask,
)
if mid_block_additional_residual is not None:
sample = sample + mid_block_additional_residual
# up
for i, upsample_block in enumerate(self.up_blocks):
is_final_block = i == len(self.up_blocks) - 1
res_samples = down_block_res_samples[-len(upsample_block.resnets) :]
down_block_res_samples = down_block_res_samples[
: -len(upsample_block.resnets)
]
# if we have not reached the final block and need to forward the
# upsample size, we do it here
if not is_final_block and forward_upsample_size:
upsample_size = down_block_res_samples[-1].shape[2:]
if (
hasattr(upsample_block, "has_cross_attention")
and upsample_block.has_cross_attention
):
sample = upsample_block(
hidden_states=sample,
temb=emb,
res_hidden_states_tuple=res_samples,
encoder_hidden_states=encoder_hidden_states,
audio_cond_fea=audio_cond_fea,
upsample_size=upsample_size,
attention_mask=attention_mask,
)
else:
sample = upsample_block(
hidden_states=sample,
temb=emb,
res_hidden_states_tuple=res_samples,
upsample_size=upsample_size,
encoder_hidden_states=encoder_hidden_states,
)
# post-process
sample = self.conv_norm_out(sample)
sample = self.conv_act(sample)
sample = self.conv_out(sample)
if not return_dict:
return (sample,)
return UNet3DConditionOutput(sample=sample)
@classmethod
def from_pretrained_2d(
cls,
pretrained_model_path: PathLike,
motion_module_path: PathLike,
subfolder=None,
unet_additional_kwargs=None,
mm_zero_proj_out=False,
):
pretrained_model_path = Path(pretrained_model_path)
motion_module_path = Path(motion_module_path)
if subfolder is not None:
pretrained_model_path = pretrained_model_path.joinpath(subfolder)
logger.info(
f"loaded temporal unet's pretrained weights from {pretrained_model_path} ..."
)
config_file = pretrained_model_path / "config.json"
if not (config_file.exists() and config_file.is_file()):
raise RuntimeError(f"{config_file} does not exist or is not a file")
unet_config = cls.load_config(config_file)
unet_config["_class_name"] = cls.__name__
unet_config["down_block_types"] = [
"CrossAttnDownBlock3D",
"CrossAttnDownBlock3D",
"CrossAttnDownBlock3D",
"DownBlock3D",
]
unet_config["up_block_types"] = [
"UpBlock3D",
"CrossAttnUpBlock3D",
"CrossAttnUpBlock3D",
"CrossAttnUpBlock3D",
]
unet_config["mid_block_type"] = "UNetMidBlock3DCrossAttn"
model = cls.from_config(unet_config, **unet_additional_kwargs)
# load the vanilla weights
if pretrained_model_path.joinpath(SAFETENSORS_WEIGHTS_NAME).exists():
logger.debug(
f"loading safeTensors weights from {pretrained_model_path} ..."
)
state_dict = load_file(
pretrained_model_path.joinpath(SAFETENSORS_WEIGHTS_NAME), device="cpu"
)
elif pretrained_model_path.joinpath(WEIGHTS_NAME).exists():
logger.debug(f"loading weights from {pretrained_model_path} ...")
state_dict = torch.load(
pretrained_model_path.joinpath(WEIGHTS_NAME),
map_location="cpu",
weights_only=True,
)
else:
raise FileNotFoundError(f"no weights file found in {pretrained_model_path}")
# load the motion module weights
if motion_module_path.exists() and motion_module_path.is_file():
if motion_module_path.suffix.lower() in [".pth", ".pt", ".ckpt"]:
logger.info(f"Load motion module params from {motion_module_path}")
motion_state_dict = torch.load(
motion_module_path, map_location="cpu", weights_only=True
)
elif motion_module_path.suffix.lower() == ".safetensors":
motion_state_dict = load_file(motion_module_path, device="cpu")
else:
raise RuntimeError(
f"unknown file format for motion module weights: {motion_module_path.suffix}"
)
if mm_zero_proj_out:
logger.info(f"Zero initialize proj_out layers in motion module...")
new_motion_state_dict = OrderedDict()
for k in motion_state_dict:
if "proj_out" in k:
continue
new_motion_state_dict[k] = motion_state_dict[k]
motion_state_dict = new_motion_state_dict
# merge the state dicts
state_dict.update(motion_state_dict)
init_state_dict = model.state_dict()
for key in init_state_dict:
if state_dict.get(key) is not None:
if state_dict.get(key).shape == init_state_dict[key].shape:
init_state_dict[key] = state_dict.get(key)
# else:
# print(key, " tensor shape is not matched with origin SD.")
# load the weights into the model
m, u = model.load_state_dict(init_state_dict, strict=False)
logger.debug(f"### missing keys: {len(m)}; \n### unexpected keys: {len(u)};")
params = [
p.numel() if "temporal" in n else 0 for n, p in model.named_parameters()
]
logger.info(f"Loaded {sum(params) / 1e6}M-parameter motion module")
return model