Make SDTokenizer class work with more types of tokenizers.

comfy/sd1_clip.py

@@ -343,17 +343,24 @@ def load_embed(embedding_name, embedding_directory, embedding_size, embed_key=No
     return embed_out
 
 class SDTokenizer:
-    def __init__(self, tokenizer_path=None, max_length=77, pad_with_end=True, embedding_directory=None, embedding_size=768, embedding_key='clip_l'):
+    def __init__(self, tokenizer_path=None, max_length=77, pad_with_end=True, embedding_directory=None, embedding_size=768, embedding_key='clip_l', tokenizer_class=CLIPTokenizer, has_start_token=True, pad_to_max_length=True):
         if tokenizer_path is None:
             tokenizer_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), "sd1_tokenizer")
-        self.tokenizer = CLIPTokenizer.from_pretrained(tokenizer_path)
+        self.tokenizer = tokenizer_class.from_pretrained(tokenizer_path)
         self.max_length = max_length
-        self.max_tokens_per_section = self.max_length - 2
 
         empty = self.tokenizer('')["input_ids"]
+        if has_start_token:
+            self.tokens_start = 1
             self.start_token = empty[0]
             self.end_token = empty[1]
+        else:
+            self.tokens_start = 0
+            self.start_token = None
+            self.end_token = empty[0]
         self.pad_with_end = pad_with_end
+        self.pad_to_max_length = pad_to_max_length
+
         vocab = self.tokenizer.get_vocab()
         self.inv_vocab = {v: k for k, v in vocab.items()}
         self.embedding_directory = embedding_directory
@@ -414,11 +421,13 @@ class SDTokenizer:
                     else:
                         continue
                 #parse word
-                tokens.append([(t, weight) for t in self.tokenizer(word)["input_ids"][1:-1]])
+                tokens.append([(t, weight) for t in self.tokenizer(word)["input_ids"][self.tokens_start:-1]])
 
         #reshape token array to CLIP input size
         batched_tokens = []
-        batch = [(self.start_token, 1.0, 0)]
+        batch = []
+        if self.start_token is not None:
+            batch.append((self.start_token, 1.0, 0))
         batched_tokens.append(batch)
         for i, t_group in enumerate(tokens):
             #determine if we're going to try and keep the tokens in a single batch
@@ -435,16 +444,21 @@ class SDTokenizer:
                     #add end token and pad
                     else:
                         batch.append((self.end_token, 1.0, 0))
+                        if self.pad_to_max_length:
                             batch.extend([(pad_token, 1.0, 0)] * (remaining_length))
                     #start new batch
-                    batch = [(self.start_token, 1.0, 0)]
+                    batch = []
+                    if self.start_token is not None:
+                        batch.append((self.start_token, 1.0, 0))
                     batched_tokens.append(batch)
                 else:
                     batch.extend([(t,w,i+1) for t,w in t_group])
                     t_group = []
 
         #fill last batch
-        batch.extend([(self.end_token, 1.0, 0)] + [(pad_token, 1.0, 0)] * (self.max_length - len(batch) - 1))
+        batch.append((self.end_token, 1.0, 0))
+        if self.pad_to_max_length:
+            batch.extend([(pad_token, 1.0, 0)] * (self.max_length - len(batch)))
 
         if not return_word_ids:
             batched_tokens = [[(t, w) for t, w,_ in x] for x in batched_tokens]