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[MiniGPT4] Add MiniGPT4 to SHARK
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-- This is the first installment of MiniGPT4 in SHARK.

Signed-off-by: Abhishek Varma <[email protected]>
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@Abhishek-Varma
Abhishek-Varma committed Jun 28, 2023
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392 changes: 392 additions & 0 deletions apps/language_models/src/model_wrappers/minigpt4.py
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import torch
import dataclasses
from enum import auto, Enum
from typing import List, Any
from transformers import StoppingCriteria, StoppingCriteriaList

class LayerNorm(torch.nn.LayerNorm):
"""Subclass torch's LayerNorm to handle fp16."""

def forward(self, x: torch.Tensor):
orig_type = x.dtype
ret = super().forward(x.type(torch.float32))
return ret.type(orig_type)

class VisionModel(torch.nn.Module):
def __init__(self, ln_vision, visual_encoder):
super().__init__()
self.ln_vision = ln_vision
self.visual_encoder = visual_encoder
def forward(self, image):
image_embeds = self.ln_vision(self.visual_encoder(image))
return image_embeds

class QformerBertModel(torch.nn.Module):
def __init__(self, qformer_bert):
super().__init__()
self.qformer_bert = qformer_bert
def forward(self, query_tokens, image_embeds, image_atts):
query_output = self.qformer_bert(
query_embeds=query_tokens,
encoder_hidden_states=image_embeds,
encoder_attention_mask=image_atts,
return_dict=True,
)
return query_output.last_hidden_state

class FirstLlamaModel(torch.nn.Module):
def __init__(self, model):
super().__init__()
self.model = model
print('SHARK: Loading LLAMA Done')

def forward(self, inputs_embeds, position_ids, attention_mask):
print("************************************")
print("inputs_embeds: ", inputs_embeds.shape, " dtype: ", inputs_embeds.dtype)
print("position_ids: ", position_ids.shape, " dtype: ", position_ids.dtype)
print("attention_mask: ", attention_mask.shape, " dtype: ", attention_mask.dtype)
print("************************************")
config = {
'inputs_embeds':inputs_embeds,
'position_ids':position_ids,
'past_key_values':None,
'use_cache':True,
'attention_mask':attention_mask,
}
output = self.model(
**config,
return_dict=True,
output_attentions=False,
output_hidden_states=False,
)
return_vals = []
return_vals.append(output.logits)
temp_past_key_values = output.past_key_values
for item in temp_past_key_values:
return_vals.append(item[0])
return_vals.append(item[1])
return tuple(return_vals)

class SecondLlamaModel(torch.nn.Module):
def __init__(self, model):
super().__init__()
self.model = model
print('SHARK: Loading LLAMA Done')

def forward(self, input_ids, position_ids, attention_mask,
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print("************************************")
print("input_ids: ", input_ids.shape, " dtype: ", input_ids.dtype)
print("position_ids: ", position_ids.shape, " dtype: ", position_ids.dtype)
print("attention_mask: ", attention_mask.shape, " dtype: ", attention_mask.dtype)
print("past_key_values: ", i1.shape, i2.shape, i63.shape, i64.shape)
print("past_key_values dtype: ", i1.dtype)
print("************************************")
config = {
'input_ids':input_ids,
'position_ids':position_ids,
'past_key_values':(
(i1, i2),
(
i3,
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),
(
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),
(
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),
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(
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),
(
i63,
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),
),
'use_cache':True,
'attention_mask':attention_mask,
}
output = self.model(
**config,
return_dict=True,
output_attentions=False,
output_hidden_states=False,
)
return_vals = []
return_vals.append(output.logits)
temp_past_key_values = output.past_key_values
for item in temp_past_key_values:
return_vals.append(item[0])
return_vals.append(item[1])
return tuple(return_vals)


class SeparatorStyle(Enum):
"""Different separator style."""
SINGLE = auto()
TWO = auto()


@dataclasses.dataclass
class Conversation:
"""A class that keeps all conversation history."""
system: str
roles: List[str]
messages: List[List[str]]
offset: int
sep_style: SeparatorStyle = SeparatorStyle.SINGLE
sep: str = "###"
sep2: str = None

skip_next: bool = False
conv_id: Any = None

def get_prompt(self):
if self.sep_style == SeparatorStyle.SINGLE:
ret = self.system + self.sep
for role, message in self.messages:
if message:
ret += role + ": " + message + self.sep
else:
ret += role + ":"
return ret
elif self.sep_style == SeparatorStyle.TWO:
seps = [self.sep, self.sep2]
ret = self.system + seps[0]
for i, (role, message) in enumerate(self.messages):
if message:
ret += role + ": " + message + seps[i % 2]
else:
ret += role + ":"
return ret
else:
raise ValueError(f"Invalid style: {self.sep_style}")

def append_message(self, role, message):
self.messages.append([role, message])

def to_gradio_chatbot(self):
ret = []
for i, (role, msg) in enumerate(self.messages[self.offset:]):
if i % 2 == 0:
ret.append([msg, None])
else:
ret[-1][-1] = msg
return ret

def copy(self):
return Conversation(
system=self.system,
roles=self.roles,
messages=[[x, y] for x, y in self.messages],
offset=self.offset,
sep_style=self.sep_style,
sep=self.sep,
sep2=self.sep2,
conv_id=self.conv_id)

def dict(self):
return {
"system": self.system,
"roles": self.roles,
"messages": self.messages,
"offset": self.offset,
"sep": self.sep,
"sep2": self.sep2,
"conv_id": self.conv_id,
}

class StoppingCriteriaSub(StoppingCriteria):

def __init__(self, stops=[], encounters=1):
super().__init__()
self.stops = stops

def __call__(self, input_ids: torch.LongTensor, scores: torch.FloatTensor):
for stop in self.stops:
if torch.all((stop == input_ids[0][-len(stop):])).item():
return True

return False

CONV_VISION = Conversation(
system="Give the following image: <Img>ImageContent</Img>. "
"You will be able to see the image once I provide it to you. Please answer my questions.",
roles=("Human", "Assistant"),
messages=[],
offset=2,
sep_style=SeparatorStyle.SINGLE,
sep="###",
)
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