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from typing import List, Optional, Union
import torch
from transformers import CLIPTokenizer, CLIPTextModel
class PromptProcessor():
def __init__(self, tokenizer: CLIPTokenizer, text_encoder: CLIPTextModel):
self.tokenizer = tokenizer
self.text_encoder = text_encoder
def get_input_ids(self, prompt: Union[str, List[str]]):
return self.tokenizer(
prompt,
padding="do_not_pad",
).input_ids
def unify_input_ids(self, input_ids: List[int]):
return self.tokenizer.pad(
{"input_ids": input_ids},
padding=True,
pad_to_multiple_of=self.tokenizer.model_max_length,
return_tensors="pt"
).input_ids
def get_embeddings(self, input_ids: torch.IntTensor):
prompts = input_ids.shape[0]
input_ids = input_ids.reshape((-1, self.tokenizer.model_max_length)).to(self.text_encoder.device)
text_embeddings = self.text_encoder(input_ids)[0].reshape((prompts, -1, 768))
return text_embeddings
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