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""" NLLB-CLIP model configuration"""
import os
from collections import OrderedDict
from typing import TYPE_CHECKING, Any, Mapping, Optional, Union
if TYPE_CHECKING:
from transformers.processing_utils import ProcessorMixin
from transformers.utils import TensorType
from transformers import CLIPVisionConfig
from transformers.configuration_utils import PretrainedConfig
from transformers.onnx import OnnxConfig
from transformers.utils import logging
logger = logging.get_logger(__name__)
class NLLBCLIPTextConfig(PretrainedConfig):
model_type = "clip_text_model"
attribute_map = {
"num_attention_heads": "encoder_attention_heads",
"hidden_size": "d_model",
}
def __init__(
self,
vocab_size=128112,
max_position_embeddings=1024,
encoder_layers=12,
encoder_ffn_dim=4096,
encoder_attention_heads=16,
encoder_layerdrop=0.05,
use_cache=True,
activation_function="relu",
d_model=1024,
dropout=0.1,
attention_dropout=0.1,
activation_dropout=0.0,
init_std=0.02,
scale_embedding=True,
pad_token_id=1,
bos_token_id=0,
eos_token_id=2,
layer_norm_eps=1e-5,
**kwargs,
):
self.vocab_size = vocab_size
self.max_position_embeddings = max_position_embeddings
self.d_model = d_model
self.encoder_ffn_dim = encoder_ffn_dim
self.encoder_layers = encoder_layers
self.encoder_attention_heads = encoder_attention_heads
self.dropout = dropout
self.attention_dropout = attention_dropout
self.activation_dropout = activation_dropout
self.activation_function = activation_function
self.init_std = init_std
self.encoder_layerdrop = encoder_layerdrop
self.use_cache = use_cache
self.num_hidden_layers = encoder_layers
self.scale_embedding = scale_embedding
self.layer_norm_eps = layer_norm_eps
super().__init__(
pad_token_id=pad_token_id,
bos_token_id=bos_token_id,
eos_token_id=eos_token_id,
**kwargs,
)
@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
)
# get the vision config dict if we are loading from CLIPConfig
if config_dict.get("model_type") == "clip":
config_dict = config_dict["text_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 NLLBCLIPConfig(PretrainedConfig):
model_type = "clip"
def __init__(
self,
text_config=None,
vision_config=None,
projection_dim=512,
logit_scale_init_value=2.6592,
**kwargs,
):
# If `_config_dict` exist, we use them for the backward compatibility.
# We pop out these 2 attributes before calling `super().__init__` to avoid them being saved (which causes a lot
# of confusion!).
text_config_dict = kwargs.pop("text_config_dict", None)
vision_config_dict = kwargs.pop("vision_config_dict", None)
super().__init__(**kwargs)
# Instead of simply assigning `[text|vision]_config_dict` to `[text|vision]_config`, we use the values in
# `[text|vision]_config_dict` to update the values in `[text|vision]_config`. The values should be same in most
# cases, but we don't want to break anything regarding `_config_dict` that existed before commit `8827e1b2`.
if text_config_dict is not None:
if text_config is None:
text_config = {}
# This is the complete result when using `text_config_dict`.
_text_config_dict = NLLBCLIPTextConfig(**text_config_dict).to_dict()
# Give a warning if the values exist in both `_text_config_dict` and `text_config` but being different.
for key, value in _text_config_dict.items():
if (
key in text_config
and value != text_config[key]
and key not in ["transformers_version"]
):
# If specified in `text_config_dict`
if key in text_config_dict:
message = (
f"`{key}` is found in both `text_config_dict` and `text_config` but with different values. "
f'The value `text_config_dict["{key}"]` will be used instead.'
)
# If inferred from default argument values (just to be super careful)
else:
message = (
f"`text_config_dict` is provided which will be used to initialize `CLIPTextConfig`. The "
f'value `text_config["{key}"]` will be overriden.'
)
logger.warning(message)
# Update all values in `text_config` with the ones in `_text_config_dict`.
text_config.update(_text_config_dict)
if vision_config_dict is not None:
if vision_config is None:
vision_config = {}
# This is the complete result when using `vision_config_dict`.
_vision_config_dict = CLIPVisionConfig(**vision_config_dict).to_dict()
# convert keys to string instead of integer
if "id2label" in _vision_config_dict:
_vision_config_dict["id2label"] = {
str(key): value
for key, value in _vision_config_dict["id2label"].items()
}
# Give a warning if the values exist in both `_vision_config_dict` and `vision_config` but being different.
for key, value in _vision_config_dict.items():
if (
key in vision_config
and value != vision_config[key]
and key not in ["transformers_version"]
):
# If specified in `vision_config_dict`
if key in vision_config_dict:
message = (
f"`{key}` is found in both `vision_config_dict` and `vision_config` but with different "
f'values. The value `vision_config_dict["{key}"]` will be used instead.'
)
# If inferred from default argument values (just to be super careful)
else:
message = (
f"`vision_config_dict` is provided which will be used to initialize `CLIPVisionConfig`. "
f'The value `vision_config["{key}"]` will be overriden.'
)
logger.warning(message)
# Update all values in `vision_config` with the ones in `_vision_config_dict`.
vision_config.update(_vision_config_dict)
if text_config is None:
text_config = {}
logger.info(
"`text_config` is `None`. Initializing the `NLLBCLIPTextConfig` with default values."
)
if vision_config is None:
vision_config = {}
logger.info(
"`vision_config` is `None`. initializing the `CLIPVisionConfig` with default values."
)
self.text_config = NLLBCLIPTextConfig(**text_config)
self.vision_config = CLIPVisionConfig(**vision_config)
self.projection_dim = projection_dim
self.logit_scale_init_value = logit_scale_init_value
self.initializer_factor = 1.0
@classmethod
def from_text_vision_configs(
cls, text_config: NLLBCLIPTextConfig, vision_config: CLIPVisionConfig, **kwargs
):
r"""
Instantiate a [`CLIPConfig`] (or a derived class) from clip text model configuration and clip vision model
configuration.
Returns:
[`CLIPConfig`]: An instance of a configuration object
"""
return cls(
text_config=text_config.to_dict(),
vision_config=vision_config.to_dict(),
**kwargs,
)
class CLIPOnnxConfig(OnnxConfig):
@property
def inputs(self) -> Mapping[str, Mapping[int, str]]:
return OrderedDict(
[
("input_ids", {0: "batch", 1: "sequence"}),
("attention_mask", {0: "batch", 1: "sequence"}),
(
"pixel_values",
{0: "batch", 1: "num_channels", 2: "height", 3: "width"},
),
]
)
@property
def outputs(self) -> Mapping[str, Mapping[int, str]]:
return OrderedDict(
[
("logits_per_image", {0: "batch"}),
("logits_per_text", {0: "batch"}),
("text_embeds", {0: "batch"}),
("image_embeds", {0: "batch"}),
]
)
@property
def atol_for_validation(self) -> float:
return 1e-4
def generate_dummy_inputs(
self,
processor: "ProcessorMixin",
batch_size: int = -1,
seq_length: int = -1,
framework: Optional["TensorType"] = None,
) -> Mapping[str, Any]:
text_input_dict = super().generate_dummy_inputs(
processor.tokenizer,
batch_size=batch_size,
seq_length=seq_length,
framework=framework,
)
image_input_dict = super().generate_dummy_inputs(
processor.image_processor, batch_size=batch_size, framework=framework
)
return {**text_input_dict, **image_input_dict}
@property
def default_onnx_opset(self) -> int:
return 14
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