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# System
import torch
from torch import nn
from utils.utils import *
import torch.utils.checkpoint
from typing import List, Optional, Tuple, Union
from transformers.modeling_utils import PreTrainedModel
# trol file
from .modeling_intern_vit import InternVisionModel
from .modeling_phi3 import Phi3ForCausalLM
# Dataclass & ModelOutput
from dataclasses import dataclass
from transformers.modeling_outputs import ModelOutput
# Configuration
########################################################################################
import copy
from transformers.configuration_utils import PretrainedConfig
from .configuration_intern_vit import InternVisionConfig
from .configuration_phi3 import Phi3Config
class TroLConfig(PretrainedConfig):
model_type = 'trol'
is_composition = True
def __init__(
self,
vision_config=None,
llm_config=None,
use_backbone_lora=0,
use_llm_lora=0,
pad2square=False,
select_layer=-1,
force_image_size=None,
downsample_ratio=0.5,
template=None,
dynamic_image_size=False,
use_thumbnail=False,
ps_version='v1',
min_dynamic_patch=1,
max_dynamic_patch=6,
**kwargs):
super().__init__(**kwargs)
self.vision_config = InternVisionConfig(**vision_config)
self.llm_config = Phi3Config(**llm_config)
self.use_backbone_lora = use_backbone_lora
self.use_llm_lora = use_llm_lora
self.pad2square = pad2square
self.select_layer = select_layer
self.force_image_size = force_image_size
self.downsample_ratio = downsample_ratio
self.template = template
self.dynamic_image_size = dynamic_image_size
self.use_thumbnail = use_thumbnail
self.ps_version = ps_version # pixel shuffle version
self.min_dynamic_patch = min_dynamic_patch
self.max_dynamic_patch = max_dynamic_patch
def to_dict(self):
output = copy.deepcopy(self.__dict__)
output['vision_config'] = self.vision_config.to_dict()
output['llm_config'] = self.llm_config.to_dict()
output['model_type'] = self.__class__.model_type
output['use_backbone_lora'] = self.use_backbone_lora
output['use_llm_lora'] = self.use_llm_lora
output['pad2square'] = self.pad2square
output['select_layer'] = self.select_layer
output['force_image_size'] = self.force_image_size
output['downsample_ratio'] = self.downsample_ratio
output['template'] = self.template
output['dynamic_image_size'] = self.dynamic_image_size
output['use_thumbnail'] = self.use_thumbnail
output['ps_version'] = self.ps_version
output['min_dynamic_patch'] = self.min_dynamic_patch
output['max_dynamic_patch'] = self.max_dynamic_patch
return output
########################################################################################
@dataclass
class TroLCausalLMOutputWithPast(ModelOutput):
loss: Optional[torch.FloatTensor] = None
logits: torch.FloatTensor = None
past_key_values: Optional[List[torch.FloatTensor]] = None
hidden_states: Optional[Tuple[torch.FloatTensor]] = None
attentions: Optional[Tuple[torch.FloatTensor]] = None
image_hidden_states: Optional[Tuple[torch.FloatTensor]] = None
class TroLForCausalLM(PreTrainedModel):
config_class = TroLConfig
def __init__(self, config):
super().__init__(config)
image_size = config.force_image_size or config.vision_config.image_size
patch_size = config.vision_config.patch_size
self.patch_size = patch_size
self.select_layer = config.select_layer
self.template = config.template
self.num_image_token = int((image_size // patch_size) ** 2 * (config.downsample_ratio ** 2))
self.downsample_ratio = config.downsample_ratio
self.ps_version = config.ps_version
self.vision_model = InternVisionModel(config.vision_config)
self.language_model = Phi3ForCausalLM(config.llm_config)
self.prompt_rule = {"system_start": "<s><|system|>\n",
"system_end": "<|end|>",
"user_start": "<|user|>\n",
"user_end": "<|end|>",
"assistant_start": "<|assistant|>\n",
"assistant_end": "<|end|>\n</s>",
"test_start": "<|assistant|>\n",
"test_end": "<|end|>",
"split": "\n",
}
vit_hidden_size = config.vision_config.hidden_size
llm_hidden_size = config.llm_config.hidden_size
self.vision_proj = nn.Sequential(
nn.LayerNorm(vit_hidden_size * int(1 / self.downsample_ratio) ** 2),
nn.Linear(vit_hidden_size * int(1 / self.downsample_ratio) ** 2, llm_hidden_size),
nn.GELU(),
nn.Linear(llm_hidden_size, llm_hidden_size)
)
def extract_feature(self, pixel_values):
self.vision_model.eval()
vit_embeds = self.vision_model(
pixel_values=pixel_values,
output_hidden_states=False,
return_dict=True).last_hidden_state
vit_embeds = vit_embeds[:, 1:, :]
h = w = int(vit_embeds.shape[1] ** 0.5)
vit_embeds = vit_embeds.reshape(vit_embeds.shape[0], h, w, -1)
vit_embeds = pixel_shuffle(vit_embeds, scale_factor=self.downsample_ratio)
vit_embeds = vit_embeds.reshape(vit_embeds.shape[0], -1, vit_embeds.shape[-1])
return vit_embeds
def eval_process(
self,
inputs,
data,
tokenizer,
device,
img_token_number,
):
batched_image = []
batched_qa_prompt=[]
for _input in inputs:
# Visualization
# imim = _input['image'].cpu().permute(1, 2, 0)
# adding <image> to question if not included despite being an image, and adding system prompt and <tor> prompt
if 'image' in _input.keys() and not '<image>' in _input['question']: _input['question'] = '<image>\n' + _input['question']
# making image prompt
if 'image' in _input.keys() and _input['image'] != None:
process_image = dynamic_preprocess(_input['image'].to(device))
dynamic_process_image = torch.stack([dynamic_transform(image) for image in process_image]).to(device)
img_token_number = dynamic_process_image.shape[0] * 256
batched_image.append(dynamic_process_image)
# make question and answer
question = make_instruction(_input['question'], data, self.prompt_rule)
# adding image special tokens to question
if 'image' in _input.keys(): question = question.replace('<image>', '<img><IMG_CONTEXT></img>')
# add bundle image tokens if it has <IMG_CONTEXT> token
question = add_bundle_tokens(question, '<IMG_CONTEXT>', img_token_number)
batched_qa_prompt.append(question)
'''For Final Outputs'''
qa_prompts = tokenizer(batched_qa_prompt, padding='longest', return_tensors="pt", add_special_tokens=False)
# [1] input_ids
input_ids = qa_prompts.input_ids.to(device)
# [2] attention_mask
attention_mask = qa_prompts.attention_mask.to(device)
if len(batched_image):
return {"input_ids": input_ids,
"attention_mask": attention_mask,
"image_features": self.extract_feature(torch.cat(batched_image, dim=0).to(device))
}
else:
return {"input_ids": input_ids,
"attention_mask": attention_mask,
}
def _merge_input_embeds_with_image_features(self, image_features, inputs_embeds, input_ids):
B, N, C = inputs_embeds.shape
input_ids = input_ids.reshape(B * N)
inputs_embeds = inputs_embeds.reshape(B * N, C)
selected = torch.where(input_ids == self.config.image_token_index)
assert selected[0].sum() != 0
inputs_embeds[selected] = image_features.reshape(-1, C).to(inputs_embeds.device)
inputs_embeds = inputs_embeds.reshape(B, N, C)
return inputs_embeds
def forward(
self,
input_ids: torch.LongTensor = None,
image_features: torch.FloatTensor = None,
attention_mask: Optional[torch.Tensor] = None,
position_ids: Optional[torch.LongTensor] = None,
past_key_values: Optional[List[torch.FloatTensor]] = None,
inputs_embeds: Optional[torch.FloatTensor] = None,
labels: Optional[torch.LongTensor] = None,
use_cache: Optional[bool] = None,
output_attentions: Optional[bool] = None,
output_hidden_states: Optional[bool] = None,
return_dict: Optional[bool] = None,
) -> Union[Tuple, TroLCausalLMOutputWithPast]:
output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
output_hidden_states = (
output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
)
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
if inputs_embeds is None:
# 1. Extra the input embeddings
try:
inputs_embeds = self.language_model.get_input_embeddings()(input_ids).requires_grad_(False)
except:
inputs_embeds = self.language_model.get_input_embeddings()(input_ids)
# 2. Merge text and images
if image_features is not None and input_ids.shape[1] != 1:
image_features = self.vision_proj(image_features.to(inputs_embeds.dtype))
inputs_embeds = self._merge_input_embeds_with_image_features(image_features, inputs_embeds, input_ids)
# In case input_ids.shape[1] == 1 & image_features==None & past_key_values != None, we are in the case of
# generation with cache
elif past_key_values is not None and image_features is not None and input_ids.shape[1] == 1:
# Retrieve the first layer to inspect the logits and mask out the hidden states
# that are set to 0
first_layer_past_key_value = past_key_values[0][0][:, :, :, 0]
# Sum all dimensions of head_dim (-2) to avoid random errors such as: https://github.com/huggingface/transformers/pull/28032#issuecomment-1863691941
batch_index, non_attended_tokens = torch.where(first_layer_past_key_value.float().sum(-2) == 0)
# Get the target length
target_length = input_ids.shape[1]
past_length = first_layer_past_key_value.shape[-1]
extended_attention_mask = torch.ones(
(attention_mask.shape[0], past_length),
dtype=attention_mask.dtype,
device=attention_mask.device,
)
# Filter out only the tokens that can be un-attended, this can happen
# if one uses Llava + Fused modules where the cache on the
# first iteration is already big enough, or if one passes custom cache
valid_indices = non_attended_tokens < extended_attention_mask.size(-1)
new_batch_index = batch_index[valid_indices]
new_non_attended_tokens = non_attended_tokens[valid_indices]
# Zero-out the places where we don't need to attend
extended_attention_mask[new_batch_index, new_non_attended_tokens] = 0
attention_mask = torch.cat((extended_attention_mask, attention_mask[:, -target_length:]), dim=1)
position_ids = torch.sum(attention_mask, dim=1).unsqueeze(-1) - 1
outputs = self.language_model(
attention_mask=attention_mask,
position_ids=position_ids,
past_key_values=past_key_values,
inputs_embeds=inputs_embeds,
use_cache=use_cache,
output_attentions=output_attentions,
output_hidden_states=output_hidden_states,
return_dict=return_dict,
)
logits = outputs.logits
loss = None
if labels is not None:
# Shift so that tokens < n predict n
if attention_mask is not None:
shift_attention_mask = attention_mask[..., 1:]
shift_logits = logits[..., :-1, :][shift_attention_mask.to(logits.device) != 0].contiguous()
shift_labels = labels[..., 1:][shift_attention_mask.to(labels.device) != 0].contiguous()
else:
shift_logits = logits[..., :-1, :].contiguous()
shift_labels = labels[..., 1:].contiguous()
# Flatten the tokens
loss_fct = nn.CrossEntropyLoss()
loss = loss_fct(
shift_logits.view(-1, shift_logits.size(-1)), shift_labels.view(-1).to(shift_logits.device)
)
if not return_dict:
output = (logits,) + outputs[1:]
return (loss,) + output if loss is not None else output
return TroLCausalLMOutputWithPast(
loss=loss,
logits=logits,
past_key_values=outputs.past_key_values,
hidden_states=outputs.hidden_states,
attentions=outputs.attentions,
)
@torch.no_grad()
def generate(
self,
image_features: Optional[torch.FloatTensor] = None,
input_ids: Optional[torch.FloatTensor] = None,
attention_mask: Optional[torch.LongTensor] = None,
**generate_kwargs,
) -> torch.LongTensor:
assert self.config.image_token_index is not None
if image_features is not None:
vit_embeds = self.vision_proj(image_features)
input_embeds = self.language_model.get_input_embeddings()(input_ids)
B, N, C = input_embeds.shape
input_embeds = input_embeds.reshape(B * N, C)
input_ids = input_ids.reshape(B * N)
selected = (input_ids == self.config.image_token_index)
assert selected.sum() != 0
input_embeds[selected] = vit_embeds.reshape(-1, C).to(input_embeds.device)
input_embeds = input_embeds.reshape(B, N, C)
else:
input_embeds = self.language_model.get_input_embeddings()(input_ids)
outputs = self.language_model.generate(
inputs_embeds=input_embeds,
attention_mask=attention_mask,
eos_token_id=self.config.eos_token_id,
**generate_kwargs,
)
return outputs |