From 99b4dba56e3e1e434820d1221d561e90f1a6d30a Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Sat, 15 Apr 2023 13:11:11 +0200
Subject: TI via LoRA

---
 models/clip/embeddings.py | 76 ++++++++++++++++-------------------------------
 1 file changed, 26 insertions(+), 50 deletions(-)

(limited to 'models/clip/embeddings.py')

diff --git a/models/clip/embeddings.py b/models/clip/embeddings.py
index 9be8256..60c1b20 100644
--- a/models/clip/embeddings.py
+++ b/models/clip/embeddings.py
@@ -11,49 +11,27 @@ from transformers import CLIPTextModel
 from transformers.models.clip import CLIPTextConfig
 from transformers.models.clip.modeling_clip import CLIPTextEmbeddings
 
-from models.sparse import PseudoSparseEmbedding
-
-
-def resize_embedding(old_embedding: nn.Embedding, new_num_embeddings: int, initializer_factor: Optional[float] = None) -> nn.Embedding:
-    old_num_embeddings, old_embedding_dim = old_embedding.weight.shape
-
-    if old_num_embeddings == new_num_embeddings:
-        return old_embedding
-
-    n = min(old_num_embeddings, new_num_embeddings)
-
-    new_embedding = nn.Embedding(
-        new_num_embeddings,
-        old_embedding_dim,
-        device=old_embedding.weight.device,
-        dtype=old_embedding.weight.dtype
-    )
-    if initializer_factor is not None:
-        new_embedding.weight.data.normal_(mean=0.0, std=initializer_factor * 0.02)
-    else:
-        nn.init.zeros_(new_embedding.weight.data)
-    new_embedding.weight.data[:n, :] = old_embedding.weight.data[:n, :]
-    return new_embedding
+from models.lora import LoraEmbedding
 
 
 class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings):
-    def __init__(self, config: CLIPTextConfig, embeddings: CLIPTextEmbeddings, dropout_p: float = 0.0):
+    def __init__(self, config: CLIPTextConfig, embeddings: CLIPTextEmbeddings, r: int = 8, lora_alpha: int = 8, lora_dropout: float = 0.0):
         super().__init__(config)
 
-        self.token_embedding = embeddings.token_embedding
         self.position_embedding = embeddings.position_embedding
         self.initializer_factor = config.initializer_factor
-
-        self.token_override_embedding = PseudoSparseEmbedding(
+        self.token_embedding = LoraEmbedding(
+            self.token_embedding.num_embeddings,
             self.token_embedding.embedding_dim,
-            dropout_p=dropout_p,
-            device=self.token_embedding.weight.device,
-            dtype=self.token_embedding.weight.dtype,
+            r,
+            lora_alpha,
+            lora_dropout,
         )
 
+        self.token_embedding.weight = embeddings.token_embedding.weight
+
     def resize(self, size: int):
-        self.token_override_embedding.resize(size)
-        self.token_embedding = resize_embedding(self.token_embedding, size, self.initializer_factor)
+        self.token_embedding = self.token_embedding.new_resized(size, self.initializer_factor)
 
     def add_embed(
         self,
@@ -87,7 +65,6 @@ class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings):
         token_ids = torch.tensor(token_ids, dtype=torch.long)
 
         self.token_embedding.weight.data[token_ids] = initializer
-        self.token_override_embedding.set(token_ids, initializer)
 
     def load_embed(self, input_ids: list[int], filename: Path):
         with safe_open(filename, framework="pt", device="cpu") as file:
@@ -97,26 +74,14 @@ class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings):
         save_file({"embed": self.get_embed(input_ids)}, filename)
 
     def persist(self):
-        input_ids = torch.arange(
-            self.token_embedding.num_embeddings,
-            device=self.token_override_embedding.mapping.device
-        )
-        embs, mask = self.token_override_embedding(input_ids)
-        if embs is not None:
-            input_ids = input_ids[mask]
-            self.token_embedding.weight.data[input_ids] = embs
-            self.token_override_embedding.unset(input_ids)
+        self.token_embedding.eval()
+        self.token_embedding.merged = False
 
     def get_embed(self, input_ids: Union[list[int], torch.LongTensor]):
         if isinstance(input_ids, list):
             input_ids = torch.tensor(input_ids, device=self.token_embedding.weight.device, dtype=torch.long)
 
-        embs = self.token_embedding(input_ids)
-        embs_override, mask = self.token_override_embedding(input_ids)
-        if embs_override is not None:
-            embs[mask] = embs_override
-
-        return embs
+        return self.token_embedding(input_ids)
 
     def forward(
         self,
@@ -138,7 +103,18 @@ class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings):
         return embeddings
 
 
-def patch_managed_embeddings(text_encoder: CLIPTextModel, dropout_p: float = 0.0) -> ManagedCLIPTextEmbeddings:
-    text_embeddings = ManagedCLIPTextEmbeddings(text_encoder.config, text_encoder.text_model.embeddings, dropout_p)
+def patch_managed_embeddings(
+    text_encoder: CLIPTextModel,
+    r: int = 8,
+    lora_alpha: int = 8,
+    lora_dropout: float = 0.0
+) -> ManagedCLIPTextEmbeddings:
+    text_embeddings = ManagedCLIPTextEmbeddings(
+        text_encoder.config,
+        text_encoder.text_model.embeddings,
+        r,
+        lora_alpha,
+        lora_dropout
+    )
     text_encoder.text_model.embeddings = text_embeddings
     return text_embeddings
-- 
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