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# --------------------------------------------------------
# InternVL
# Copyright (c) 2023 OpenGVLab
# Licensed under The MIT License [see LICENSE for details]
# --------------------------------------------------------
import os
import copy
from typing import Union
from transformers import LlamaConfig
from transformers.configuration_utils import PretrainedConfig
from transformers.utils import logging
logger = logging.get_logger(__name__)
class InternVisionConfig(PretrainedConfig):
r"""
This is the configuration class to store the configuration of a [`InternVisionModel`]. It is used to
instantiate a vision encoder according to the specified arguments, defining the model architecture.
Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
documentation from [`PretrainedConfig`] for more information.
Args:
num_channels (`int`, *optional*, defaults to 3):
Number of color channels in the input images (e.g., 3 for RGB).
patch_size (`int`, *optional*, defaults to 14):
The size (resolution) of each patch.
image_size (`int`, *optional*, defaults to 224):
The size (resolution) of each image.
qkv_bias (`bool`, *optional*, defaults to `False`):
Whether to add a bias to the queries and values in the self-attention layers.
hidden_size (`int`, *optional*, defaults to 3200):
Dimensionality of the encoder layers and the pooler layer.
num_attention_heads (`int`, *optional*, defaults to 25):
Number of attention heads for each attention layer in the Transformer encoder.
intermediate_size (`int`, *optional*, defaults to 12800):
Dimensionality of the "intermediate" (i.e., feed-forward) layer in the Transformer encoder.
qk_normalization (`bool`, *optional*, defaults to `True`):
Whether to normalize the queries and keys in the self-attention layers.
num_hidden_layers (`int`, *optional*, defaults to 48):
Number of hidden layers in the Transformer encoder.
use_flash_attn (`bool`, *optional*, defaults to `True`):
Whether to use flash attention mechanism.
hidden_act (`str` or `function`, *optional*, defaults to `"gelu"`):
The non-linear activation function (function or string) in the encoder and pooler. If string, `"gelu"`,
`"relu"`, `"selu"` and `"gelu_new"` ``"gelu"` are supported.
layer_norm_eps (`float`, *optional*, defaults to 1e-6):
The epsilon used by the layer normalization layers.
dropout (`float`, *optional*, defaults to 0.0):
The dropout probability for all fully connected layers in the embeddings, encoder, and pooler.
drop_path_rate (`float`, *optional*, defaults to 0.0):
Dropout rate for stochastic depth.
attention_dropout (`float`, *optional*, defaults to 0.0):
The dropout ratio for the attention probabilities.
initializer_range (`float`, *optional*, defaults to 0.02):
The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
initializer_factor (`float`, *optional*, defaults to 0.1):
A factor for layer scale.
"""
model_type = 'intern_vit_6b'
def __init__(
self,
num_channels=3,
patch_size=14,
image_size=224,
qkv_bias=False,
hidden_size=3200,
num_attention_heads=25,
intermediate_size=12800,
qk_normalization=True,
num_hidden_layers=48,
use_flash_attn=True,
hidden_act='gelu',
layer_norm_eps=1e-6,
dropout=0.0,
drop_path_rate=0.0,
attention_dropout=0.0,
initializer_range=0.02,
initializer_factor=0.1,
**kwargs,
):
super().__init__(**kwargs)
self.hidden_size = hidden_size
self.intermediate_size = intermediate_size
self.dropout = dropout
self.drop_path_rate = drop_path_rate
self.num_hidden_layers = num_hidden_layers
self.num_attention_heads = num_attention_heads
self.num_channels = num_channels
self.patch_size = patch_size
self.image_size = image_size
self.initializer_range = initializer_range
self.initializer_factor = initializer_factor
self.attention_dropout = attention_dropout
self.layer_norm_eps = layer_norm_eps
self.hidden_act = hidden_act
self.qkv_bias = qkv_bias
self.qk_normalization = qk_normalization
self.use_flash_attn = use_flash_attn
@classmethod
def from_pretrained(cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs) -> 'PretrainedConfig':
config_dict, kwargs = cls.get_config_dict(pretrained_model_name_or_path, **kwargs)
if 'vision_config' in config_dict:
config_dict = config_dict['vision_config']
if 'model_type' in config_dict and hasattr(cls, 'model_type') and config_dict['model_type'] != cls.model_type:
logger.warning(
f"You are using a model of type {config_dict['model_type']} to instantiate a model of type "
f'{cls.model_type}. This is not supported for all configurations of models and can yield errors.'
)
return cls.from_dict(config_dict, **kwargs)
class InternVLChatConfig(PretrainedConfig):
model_type = 'internvl_chat'
is_composition = True
def __init__(
self,
vision_config=None,
llm_config=None,
use_backbone_lora=0,
use_llm_lora=0,
pad2square=False,
select_layer=-4,
force_image_size=None,
downsample_ratio=0.5,
template=None,
**kwargs):
super().__init__(**kwargs)
if vision_config is None:
vision_config = {}
logger.info('vision_config is None. Initializing the InternVisionConfig with default values.')
if llm_config is None:
llm_config = {}
logger.info('llm_config is None. Initializing the LlamaConfig config with default values (`LlamaConfig`).')
self.vision_config = InternVisionConfig(**vision_config)
self.llm_config = LlamaConfig(**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
def to_dict(self):
"""
Serializes this instance to a Python dictionary. Override the default [`~PretrainedConfig.to_dict`].
Returns:
`Dict[str, any]`: Dictionary of all the attributes that make up this configuration instance,
"""
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
return output
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