Add CLIPTextModel and CLIPVisionModel (#829)

* Add `CLIPTextModel` and `CLIPVisionModel`

* Fix jinja2 version for tests

Author: xenova

src/models.js

@@ -3099,6 +3099,18 @@ export class CLIPPreTrainedModel extends PreTrainedModel { }
  */
 export class CLIPModel extends CLIPPreTrainedModel { }
 
+/**
+ * The text model from CLIP without any head or projection on top.
+ */
+export class CLIPTextModel extends CLIPPreTrainedModel {
+    /** @type {PreTrainedModel.from_pretrained} */
+    static async from_pretrained(pretrained_model_name_or_path, options = {}) {
+        // Update default model file name if not provided
+        options.model_file_name ??= 'text_model';
+        return super.from_pretrained(pretrained_model_name_or_path, options);
+    }
+}
+
 /**
  * CLIP Text Model with a projection layer on top (a linear layer on top of the pooled output)
  * 
@@ -3126,7 +3138,6 @@ export class CLIPModel extends CLIPPreTrainedModel { }
  * ```
  */
 export class CLIPTextModelWithProjection extends CLIPPreTrainedModel {
-
     /** @type {PreTrainedModel.from_pretrained} */
     static async from_pretrained(pretrained_model_name_or_path, options = {}) {
         // Update default model file name if not provided
@@ -3135,6 +3146,18 @@ export class CLIPTextModelWithProjection extends CLIPPreTrainedModel {
     }
 }
 
+/**
+ * The vision model from CLIP without any head or projection on top.
+ */
+export class CLIPVisionModel extends CLIPPreTrainedModel {
+    /** @type {PreTrainedModel.from_pretrained} */
+    static async from_pretrained(pretrained_model_name_or_path, options = {}) {
+        // Update default model file name if not provided
+        options.model_file_name ??= 'vision_model';
+        return super.from_pretrained(pretrained_model_name_or_path, options);
+    }
+}
+
 /**
  * CLIP Vision Model with a projection layer on top (a linear layer on top of the pooled output)
  * 

tests/requirements.txt

@@ -3,3 +3,4 @@ sacremoses==0.0.53
 sentencepiece==0.1.99
 protobuf==4.24.3
 rjieba==0.1.11
+jinja2==3.1.0