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import torch
import torch.nn as nn
import re
import math
from transformers import CLIPVisionModel, CLIPImageProcessor, CLIPVisionConfig
def build_vision_tower():
vision_tower = 'internlm-xcomposer2d5-ol-7b/base/IXC2d5_clip_l_560'
return CLIPVisionTower(vision_tower)
def build_vision_projector(input_dim=4096):
projector_type = 'mlp2x_gelu'
mm_hidden_size = input_dim
mid_hidden_size = 4096
hidden_size = 4096
mlp_gelu_match = re.match(r'^mlp(\d+)x_gelu$', projector_type)
if mlp_gelu_match:
mlp_depth = int(mlp_gelu_match.group(1))
modules = [nn.Linear(mm_hidden_size, mid_hidden_size)]
for _ in range(1, mlp_depth):
modules.append(nn.GELU())
modules.append(nn.Linear(mid_hidden_size, mid_hidden_size))
return nn.Sequential(*modules)
if projector_type == 'identity':
return IdentityMap()
raise ValueError(f'Unknown projector type: {projector_type}')
class IdentityMap(nn.Module):
def __init__(self):
super().__init__()
def forward(self, x, *args, **kwargs):
return x
@property
def config(self):
return {"mm_projector_type": 'identity'}
class CLIPVisionTower(nn.Module):
def __init__(self, vision_tower):
super().__init__()
self.is_loaded = False
self.vision_tower_name = vision_tower
# self.conv_dim = 8192
# self.conv = torch.nn.Conv2d(1024, self.conv_dim,3,2,1)
self.select_layer = -1
self.select_feature = 'patch'
self.load_model()
def load_model(self):
self.vision_tower = CLIPVisionModel.from_pretrained(self.vision_tower_name)
self.vision_tower.requires_grad_(False)
self.is_loaded = True
def resize_pos(self):
print('Dummy Resized')
def feature_select(self, image_forward_outs):
image_features = image_forward_outs.hidden_states[self.select_layer]
if self.select_feature == 'patch':
image_features = image_features[:, 1:]
elif self.select_feature == 'cls_patch':
image_features = image_features
else:
raise ValueError(f'Unexpected select feature: {self.select_feature}')
return image_features
def forward(self, images, glb_GN, sub_GN):
if not self.is_loaded:
self.load_model()
assert type(images) is list
shapes = []
input_imgs = []
for img in images:
_, C, H, W = img.shape
shapes.append([H // 560, W // 560])
sub_img = img.reshape(1, 3, H // 560, 560, W // 560, 560).permute(0, 2, 4, 1, 3, 5).reshape(-1, 3, 560,
560).contiguous()
glb_img = torch.nn.functional.interpolate(img.float(), size=(560, 560), mode='bicubic', ).to(sub_img.dtype)
input_imgs.append(glb_img)
input_imgs.append(sub_img)
input_imgs = torch.cat(input_imgs, dim=0)
'''
if input_imgs.shape[0] > 50:
image_f_1 = self.vision_tower(input_imgs[:50].to(device=self.device, dtype=self.dtype), output_hidden_states=True).hidden_states[self.select_layer][:, 1:]
with torch.no_grad():
image_f_2 = self.vision_tower(input_imgs[50:].to(device=self.device, dtype=self.dtype), output_hidden_states=True).hidden_states[self.select_layer][:, 1:]
image_features = torch.cat([image_f_1, image_f_2], dim=0).to(input_imgs.dtype)
else:
image_features = self.vision_tower(input_imgs.to(device=self.device, dtype=self.dtype), output_hidden_states=True).hidden_states[self.select_layer][:, 1:].to(input_imgs.dtype)
'''
image_features = \
self.vision_tower(input_imgs.to(device=self.device, dtype=self.dtype), output_hidden_states=True).hidden_states[
self.select_layer][:, 1:].to(input_imgs.dtype)
_, N, C = image_features.shape
H = int(math.sqrt(N))
assert N == 40 ** 2
output_imgs = []
output_len = []
for [h, w] in shapes:
B_ = h * w
glb_img = image_features[:1] ### 1, N, C
glb_img = glb_img.reshape(1, H, H, C).reshape(1, H // 2, 2, H // 2, 2, C).contiguous().permute(0, 1, 3, 2,
4,
5).reshape(1,
H // 2,
H // 2,
4 * C).contiguous()
temp_glb_GN = sub_GN.repeat(1, H // 2, 1, 1)
glb_img = torch.cat([glb_img, temp_glb_GN], dim=2).reshape(1, -1, 4 * C)
sub_img = image_features[1:1 + B_] ### ?, N, C
sub_img = sub_img.reshape(B_, H, H, C).reshape(B_, H // 2, 2, H // 2, 2, C).contiguous().permute(0, 1, 3, 2,
4,
5).reshape(
B_, -1, 4 * C).contiguous()
sub_img = sub_img.reshape(1, h, w, 20, 20, -1).permute(0, 1, 3, 2, 4, 5).reshape(1, h * 20, w * 20, 4 * C)
temp_sub_GN = sub_GN.repeat(1, h * 20, 1, 1)
sub_img = torch.cat([sub_img, temp_sub_GN], dim=2).reshape(1, -1, 4 * C)
output_imgs.append(torch.cat([glb_img, glb_GN, sub_img], dim=1))
temp_len = int((h * w + 1) * 400 + 1 + (h + 1) * 20)
assert temp_len == output_imgs[-1].shape[1]
output_len.append(temp_len)
image_features = image_features[1 + h * w:]
output_imgs = torch.cat(output_imgs, dim=1)
return output_imgs, output_len
@property
def dummy_feature(self):
return torch.zeros(1, self.hidden_size, device=self.device, dtype=self.dtype)
@property
def dtype(self):
return self.vision_tower.dtype
@property
def device(self):
return self.vision_tower.device
@property
def config(self):
if self.is_loaded:
return self.vision_tower.config
else:
return self.cfg_only
@property
def hidden_size(self):
return self.config.hidden_size
@property
def num_patches(self):
return (self.config.image_size // self.config.patch_size) ** 2
class PLoRA(nn.Linear):
def __init__(self,
in_features: int,
out_features: int,
bias: bool = True,
device=None,
dtype=None,
lora_r=8,
lora_alpha=16,
lora_dropout=0.05,
lora_len=0,
**kwargs) -> None:
super().__init__(in_features, out_features, bias, device, dtype)
self.lora_r = lora_r
self.lora_alpha = lora_alpha
self.lora_len = lora_len
if lora_dropout > 0.:
self.lora_dropout = nn.Dropout(p=lora_dropout)
else:
self.lora_dropout = lambda x: x
self.lora_scaling = self.lora_alpha / self.lora_r
self.Plora_A = nn.Linear(in_features,
self.lora_r,
bias=False,
device=device,
dtype=dtype)
self.Plora_B = nn.Linear(self.lora_r,
out_features,
bias=False,
device=device,
dtype=dtype)
self.reset_parameters()
def reset_parameters(self):
if hasattr(self, 'lora_A'):
# initialize A the same way as the default for nn.Linear and B to zero
nn.init.kaiming_uniform_(self.lora_A.weight, a=math.sqrt(5))
nn.init.zeros_(self.lora_B.weight)
# print ("lora weight init {} {}".format(torch.mean(self.lora_A.weight), torch.mean(self.lora_B.weight)))
def forward(self, x, im_mask=None):
B, N, C = x.shape
im_mask = im_mask.view(-1)
x = x.reshape(-1, C)
res = super().forward(x)
if im_mask is not None:
if torch.sum(im_mask) > 0:
part_x = x[im_mask]
res[im_mask] += self.Plora_B(self.Plora_A(
self.lora_dropout(part_x))) * self.lora_scaling
else:
part_x = x[:1]
res[:1] += self.Plora_B(self.Plora_A(
self.lora_dropout(part_x))) * 0
return res.reshape(B, N, -1)
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