From 30b557c8e1f03b4748ac3efca599ff51d66561cb Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Tue, 4 Apr 2023 07:30:43 +0200
Subject: TI: Bring back old embedding decay

---
 models/clip/embeddings.py | 15 +++++++--------
 models/sparse.py          | 14 ++++++++------
 2 files changed, 15 insertions(+), 14 deletions(-)

(limited to 'models')

diff --git a/models/clip/embeddings.py b/models/clip/embeddings.py
index a356434..63a141f 100644
--- a/models/clip/embeddings.py
+++ b/models/clip/embeddings.py
@@ -37,7 +37,7 @@ def resize_embedding(old_embedding: nn.Embedding, new_num_embeddings: int, initi
 
 
 class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings):
-    def __init__(self, config: CLIPTextConfig, embeddings: CLIPTextEmbeddings, alpha: float = 1.0):
+    def __init__(self, config: CLIPTextConfig, embeddings: CLIPTextEmbeddings):
         super().__init__(config)
 
         self.token_embedding = embeddings.token_embedding
@@ -49,7 +49,6 @@ class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings):
             device=self.token_embedding.weight.device,
             dtype=self.token_embedding.weight.dtype,
         )
-        self.alpha = alpha
 
     def resize(self, size: int):
         self.token_override_embedding.resize(size)
@@ -87,7 +86,7 @@ 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)
+        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:
@@ -101,8 +100,8 @@ class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings):
         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] += self.alpha * embs
-        self.token_override_embedding.unset(input_ids)
+            self.token_embedding.weight.data[input_ids] = embs
+            self.token_override_embedding.unset(input_ids)
 
     def get_embed(self, input_ids: Union[list[int], torch.LongTensor]):
         if isinstance(input_ids, list):
@@ -111,7 +110,7 @@ class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings):
         embs = self.token_embedding(input_ids)
         embs_override, mask = self.token_override_embedding(input_ids)
         if embs_override is not None:
-            embs[mask] += self.alpha * embs_override
+            embs[mask] = embs_override
 
         return embs
 
@@ -135,7 +134,7 @@ class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings):
         return embeddings
 
 
-def patch_managed_embeddings(text_encoder: CLIPTextModel, alpha: float = 1.0) -> ManagedCLIPTextEmbeddings:
-    text_embeddings = ManagedCLIPTextEmbeddings(text_encoder.config, text_encoder.text_model.embeddings, alpha)
+def patch_managed_embeddings(text_encoder: CLIPTextModel) -> ManagedCLIPTextEmbeddings:
+    text_embeddings = ManagedCLIPTextEmbeddings(text_encoder.config, text_encoder.text_model.embeddings)
     text_encoder.text_model.embeddings = text_embeddings
     return text_embeddings
diff --git a/models/sparse.py b/models/sparse.py
index 0b15454..8910316 100644
--- a/models/sparse.py
+++ b/models/sparse.py
@@ -13,10 +13,7 @@ class PseudoSparseEmbedding(nn.Module):
         self.params = nn.ParameterList()
         self.mapping = torch.zeros(0, device=device, dtype=torch.long)
 
-    def forward(self, input_ids: Optional[torch.LongTensor] = None):
-        if input_ids is None:
-            input_ids = torch.arange(self.mapping.shape[0])
-
+    def forward(self, input_ids: torch.LongTensor):
         ids = self.mapping[input_ids.to(self.mapping.device)]
         mask = ~(ids == -1)
 
@@ -43,6 +40,12 @@ class PseudoSparseEmbedding(nn.Module):
             else:
                 return [self.set(id) for id in input_ids]
 
+        if tensor is None:
+            tensor = torch.zeros(self.embedding_dim, device=self.mapping.device, dtype=self.dtype)
+
+        if tensor.shape[-1] != self.embedding_dim:
+            raise ValueError(f"Expected tensor of shape [..., {self.embedding_dim}], but got [..., {tensor.shape[-1]}]")
+
         id = self.mapping[input_ids]
 
         if id == -1:
@@ -50,8 +53,7 @@ class PseudoSparseEmbedding(nn.Module):
             self.mapping[input_ids] = id
             self.params.append(torch.zeros(self.embedding_dim, device=self.mapping.device, dtype=self.dtype))
 
-        self.params[id] = tensor if tensor is not None else torch.zeros(
-            self.embedding_dim, device=self.mapping.device, dtype=self.dtype)
+        self.params[id] = tensor
 
     def unset(self, input_ids: torch.LongTensor):
         self.mapping[input_ids] = -1
-- 
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