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# coding=utf-8
# Copyright 2024 Microsoft and the HuggingFace Inc. team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import math
import torch
import torch.nn as nn
from transformers import CLIPVisionModel, PretrainedConfig
from transformers import CLIPVisionConfig
from transformers.utils import logging
from datetime import datetime
logger = logging.get_logger(__name__)
CLIP_VIT_LARGE_PATCH14_336_CONFIG = CLIPVisionConfig(
attention_dropout=0.0,
dropout=0.0,
hidden_act="quick_gelu",
hidden_size=1024,
image_size=336,
initializer_factor=1.0,
initializer_range=0.02,
intermediate_size=4096,
layer_norm_eps=1e-05,
num_attention_heads=16,
num_channels=3,
num_hidden_layers=24,
patch_size=14,
projection_dim=768
)
class Phi3ImageEmbedding(nn.Module):
"""Phi3 Image embedding."""
def __init__(self, config: PretrainedConfig, wte=None, **kwargs) -> None:
super().__init__()
# n_embed or hidden_size
hidden_size = config.n_embd if hasattr(config, 'n_embd') else config.hidden_size
if hasattr(config, 'embd_pdrop') or hasattr(config, 'embed_pdrop'):
embd_drop = config.embd_pdrop if hasattr(config, 'embd_pdrop') else config.embed_pdrop
self.drop = nn.Dropout(embd_drop)
else:
self.drop = None
self.wte = wte
if isinstance(config.img_processor, dict) and config.img_processor.get('name', None) == 'clip_vision_model':
assert 'model_name' in config.img_processor, 'model_name must be provided for CLIPVisionModel'
assert 'image_dim_out' in config.img_processor, 'image_dim_out must be provided for CLIPVisionModel'
assert 'num_img_tokens' in config.img_processor, 'num_img_tokens must be provided for CLIPVisionModel'
assert config.img_processor['model_name'] == 'openai/clip-vit-large-patch14-336'
clip_config = CLIP_VIT_LARGE_PATCH14_336_CONFIG
self.img_processor = CLIPVisionModel(clip_config)
image_dim_out = config.img_processor['image_dim_out']
self.num_img_tokens = config.img_processor['num_img_tokens']
else:
raise NotImplementedError(f'img_processor = {config.img_processor}, not implemented')
self.image_dim_out = image_dim_out
self.img_sizes = None
# global_gn and sub_gn for hd transform, serves as line separator
self.use_hd_transform = kwargs.get('use_hd_transform', False)
self.with_learnable_separator = kwargs.get('with_learnable_separator', False)
self.hd_transform_order = kwargs.get('hd_transform_order', 'glb_sub')
# with_hd_transform and with_learnable_separator should have same value
assert self.use_hd_transform == self.with_learnable_separator, 'use_hd_transform and with_learnable_separator should have same value'
if self.with_learnable_separator:
assert self.use_hd_transform, 'learnable separator is only for hd transform'
# 1024 * 4, merge spatial to channel dimension
self.glb_GN = nn.Parameter(torch.zeros([1, 1, self.image_dim_out * 4]))
self.sub_GN = nn.Parameter(torch.zeros([1, 1, 1, self.image_dim_out * 4]))
logger.info(f'learnable separator enabled for hd transform, hd_transform_order = {self.hd_transform_order}')
projection_cls = kwargs.get('projection_cls', 'linear')
if projection_cls == 'linear':
self.img_projection = nn.Linear(image_dim_out, hidden_size)
elif projection_cls == 'mlp' and self.use_hd_transform:
dim_projection = hidden_size
depth = 2
layers = [nn.Linear(image_dim_out * 4, dim_projection)]
for _ in range(1, depth):
layers.extend([nn.GELU(),
nn.Linear(dim_projection, dim_projection)])
self.img_projection = nn.Sequential(*layers)
elif projection_cls == 'mlp':
dim_projection = hidden_size
depth = 2
layers = [nn.Linear(image_dim_out, dim_projection)]
for _ in range(1, depth):
layers.extend([nn.GELU(),
nn.Linear(dim_projection, dim_projection)])
self.img_projection = nn.Sequential(*layers)
else:
raise NotImplementedError(f'projection_cls = {projection_cls}, not implemented')
self.vocab_size = config.vocab_size
self.img_features = None
if isinstance(config.img_processor, dict):
self.layer_idx = config.img_processor.get('layer_idx', -2)
self.type_feature = config.img_processor.get('type_feature', 'patch')
else:
self.layer_idx = -2
self.type_feature = 'patch'
def set_img_features(self, img_features: torch.FloatTensor) -> None:
self.img_features = img_features
def set_img_sizes(self, img_sizes: torch.LongTensor) -> None:
self.img_sizes = img_sizes
def get_img_features(self, img_embeds: torch.FloatTensor) -> torch.FloatTensor:
LAYER_IDX = self.layer_idx
TYPE_FEATURE = self.type_feature
img_processor_output = self.img_processor(img_embeds, output_hidden_states=True)
img_feature = img_processor_output.hidden_states[LAYER_IDX]
if TYPE_FEATURE == "patch":
patch_feature = img_feature[:, 1:]
return patch_feature
if TYPE_FEATURE == "cls_patch":
return img_feature
raise NotImplementedError
def forward(self, input_ids: torch.LongTensor, pixel_values: torch.FloatTensor, image_sizes=None) -> torch.FloatTensor:
MAX_INPUT_ID = int(1e9)
img_embeds = pixel_values
img_sizes = image_sizes
if self.img_features is not None:
img_embeds = self.img_features.clone()
self.img_features = None
if self.img_sizes is not None:
img_sizes = self.img_sizes
input_shape = input_ids.size()
input_ids = input_ids.view(-1, input_shape[-1])
with torch.no_grad():
positions = torch.nonzero((input_ids < 0) & (input_ids > -MAX_INPUT_ID), as_tuple=False)
select = False
if isinstance(self.img_projection, nn.Sequential):
target_device = self.img_projection[0].bias.device
target_dtype = self.img_projection[0].bias.dtype
else: # It's a single nn.Linear layer
target_device = self.img_projection.bias.device
target_dtype = self.img_projection.bias.dtype
if len(positions.tolist()) > 0:
with torch.no_grad():
g_values = abs(input_ids[positions[:, 0], positions[:, 1]])
if self.use_hd_transform and img_sizes is not None and len(img_sizes):
hd_transform = True
assert img_embeds.ndim == 5, f'img_embeds size: {img_embeds.size()}, expect 5D tensor for hd transform'
# img_embeds: (num_images, max_num_crops, 3, H, W)
# img_sizes: (num_images, 2).view(1, -1)
start_time = datetime.now()
bs = img_embeds.shape[0]
# Nx(HW)xC
img_features = self.get_img_features(img_embeds.flatten(0, 1))
base_feat_height = base_feat_width = int(img_features.shape[1] ** 0.5)
assert base_feat_height == 24 and base_feat_width == 24, f'base_feat_height: {base_feat_height}, base_feat_width: {base_feat_width}, expect 24x24 features for hd transform'
# bs x max_num_crops x (24x24) x C
img_features = img_features.view(bs, -1, base_feat_height * base_feat_width, self.image_dim_out)
C = self.image_dim_out
H = base_feat_height
output_imgs = []
output_len = []
# training is tensor, inference is list
if isinstance(img_sizes, torch.Tensor):
img_sizes = img_sizes.view(-1, 2)
for _bs in range(bs):
h, w = img_sizes[_bs]
h = h // 336
w = w // 336
B_ = h * w
# 1 x (24x24) x 1024
global_img_feature = img_features[_bs, :1]
# 1 x 12 x 12 x 4096
glb_img = global_img_feature.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 = self.sub_GN.repeat(1, H//2, 1, 1)
# 1 x 156 x 4096
glb_img = torch.cat([glb_img, temp_glb_GN], dim=2).reshape(1,-1,4*C)
# (max_num_crops-1) x (12x12) x C
sub_img = img_features[_bs, 1:]
# 16x574x1024
# get rid of padding sub_img
sub_img = sub_img[:B_]
# (num_crops, 12, 2, 12, 2, 1024) -> (num_crops, 12, 12, 2, 2, 1024) -> (num_crops, 12*12, 4*1024)
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, 12, 12, -1).permute(0,1,3,2,4,5).reshape(1,h*12,w*12,4*C)
temp_sub_GN = self.sub_GN.repeat(1, h*12, 1, 1)
sub_img = torch.cat([sub_img, temp_sub_GN], dim=2).reshape(1,-1,4*C)
# (1, num_img_tokens, 1024*4)
# glb + sub
if self.hd_transform_order == 'glb_sub':
output_imgs.append(torch.cat([glb_img, self.glb_GN, sub_img], dim=1))
elif self.hd_transform_order == 'sub_glb':
output_imgs.append(torch.cat([sub_img, self.glb_GN, glb_img], dim=1))
else:
raise NotImplementedError(f'hd_transform_order = {self.hd_transform_order}, not implemented')
temp_len = int((h*w+1)*144 + 1 + (h+1)*12)
assert temp_len == output_imgs[-1].shape[1], f'temp_len: {temp_len}, output_imgs[-1].shape[1]: {output_imgs[-1].shape[1]}'
output_len.append(temp_len)
num_img_tokens = output_len
img_set_tensor = []
for _output_img in output_imgs:
img_feature_proj = self.img_projection(_output_img.to(target_device).to(target_dtype))
img_set_tensor.append(img_feature_proj)
logger.info(f'img_embeds size: {img_embeds.size()}, image sizes: {img_sizes} loading time {datetime.now() - start_time}')
elif img_embeds.ndim == 4:
selected_g_values = g_values[::self.num_img_tokens]
assert len(img_embeds) == len(selected_g_values), f'img_embeds size: {img_embeds.size()}, selected_g_values size: {len(selected_g_values)}, selected_g_value {selected_g_values}'
start_time = datetime.now()
tt = (
self.get_img_features(img_embeds)
.to(target_device)
.to(target_dtype)
.reshape(-1, self.image_dim_out)
)
logger.info(f'img_embeds size: {img_embeds.size()}, loading time {datetime.now() - start_time}')
img_set_tensor = self.img_projection(tt) # adapted visual features.
elif img_embeds.ndim == 3:
selected_g_values = g_values[::self.num_img_tokens]
assert len(img_embeds) == len(selected_g_values), f'img_embeds size: {img_embeds.size()}, selected_g_values size: {len(selected_g_values)}, selected_g_value {selected_g_values}'
tt = (
img_embeds
.to(target_device)
.to(target_dtype)
.view(-1, self.image_dim_out)
)
img_set_tensor = self.img_projection(tt) # adapted visual features.
else:
raise NotImplementedError
select = True
with torch.no_grad():
input_ids.clamp_min_(0).clamp_max_(self.vocab_size)
hidden_states = self.wte(input_ids)
if select:
if hd_transform:
idx = 0
for i, cnt in enumerate(num_img_tokens):
hidden_states[positions[idx, 0], positions[idx, 1] : positions[idx, 1] + cnt] = (
img_set_tensor[i]
.to(hidden_states.dtype)
.to(hidden_states.device)
)
idx += cnt
else:
idx = 0
assert len(selected_g_values) * self.num_img_tokens == len(img_set_tensor), f'len(selected_g_values) * self.num_img_tokens = {len(selected_g_values) * self.num_img_tokens}, len(img_set_tensor) = {len(img_set_tensor)}'
for i, g in enumerate(selected_g_values):
cnt = self.num_img_tokens
hidden_states[positions[idx, 0], positions[idx, 1] : positions[idx, 1] + cnt] = (
img_set_tensor[i * cnt : (i + 1) * cnt]
.to(hidden_states.dtype)
.to(hidden_states.device)
)
idx += cnt
if self.drop is not None:
hidden_states = self.drop(hidden_states)
return hidden_states
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