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from typing import Tuple
import torch.nn as nn
import torch.nn.functional as F
import torch.nn.init as init
from diffusers.models.modeling_utils import ModelMixin
from musepose.models.motion_module import zero_module
from musepose.models.resnet import InflatedConv3d
class PoseGuider(ModelMixin):
def __init__(
self,
conditioning_embedding_channels: int,
conditioning_channels: int = 3,
block_out_channels: Tuple[int] = (16, 32, 64, 128),
):
super().__init__()
self.conv_in = InflatedConv3d(
conditioning_channels, block_out_channels[0], kernel_size=3, padding=1
)
self.blocks = nn.ModuleList([])
for i in range(len(block_out_channels) - 1):
channel_in = block_out_channels[i]
channel_out = block_out_channels[i + 1]
self.blocks.append(
InflatedConv3d(channel_in, channel_in, kernel_size=3, padding=1)
)
self.blocks.append(
InflatedConv3d(
channel_in, channel_out, kernel_size=3, padding=1, stride=2
)
)
self.conv_out = zero_module(
InflatedConv3d(
block_out_channels[-1],
conditioning_embedding_channels,
kernel_size=3,
padding=1,
)
)
def forward(self, conditioning):
embedding = self.conv_in(conditioning)
embedding = F.silu(embedding)
for block in self.blocks:
embedding = block(embedding)
embedding = F.silu(embedding)
embedding = self.conv_out(embedding)
return embedding
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