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-rw-r--r--models/clip/prompt.py31
1 files changed, 31 insertions, 0 deletions
diff --git a/models/clip/prompt.py b/models/clip/prompt.py
new file mode 100644
index 0000000..c1e3340
--- /dev/null
+++ b/models/clip/prompt.py
@@ -0,0 +1,31 @@
1from typing import List, Optional, Union
2
3import torch
4
5from transformers import CLIPTokenizer, CLIPTextModel
6
7
8class PromptProcessor():
9 def __init__(self, tokenizer: CLIPTokenizer, text_encoder: CLIPTextModel):
10 self.tokenizer = tokenizer
11 self.text_encoder = text_encoder
12
13 def get_input_ids(self, prompt: Union[str, List[str]]):
14 return self.tokenizer(
15 prompt,
16 padding="do_not_pad",
17 ).input_ids
18
19 def unify_input_ids(self, input_ids: List[int]):
20 return self.tokenizer.pad(
21 {"input_ids": input_ids},
22 padding=True,
23 pad_to_multiple_of=self.tokenizer.model_max_length,
24 return_tensors="pt"
25 ).input_ids
26
27 def get_embeddings(self, input_ids: torch.IntTensor):
28 prompts = input_ids.shape[0]
29 input_ids = input_ids.reshape((-1, self.tokenizer.model_max_length)).to(self.text_encoder.device)
30 text_embeddings = self.text_encoder(input_ids)[0].reshape((prompts, -1, 768))
31 return text_embeddings