Add VQA demo with gptcache

Signed-off-by: shiyu22 <shiyu.chen@zilliz.com>

README.md

@@ -87,6 +87,8 @@ in [eval_configs/minigpt4_eval.yaml](eval_configs/minigpt4_eval.yaml#L10) at Lin
 
 ### Launching Demo Locally
 
+- MiniGPT4 Demo
+
 Try out our demo [demo.py](demo.py) on your local machine by running
 
 ```
@@ -101,6 +103,18 @@ in 16 bit by setting low_resource to False in the config file
 
 Thanks [@WangRongsheng](https://github.com/WangRongsheng), you can also run our code on [Colab](https://colab.research.google.com/drive/1OK4kYsZphwt5DXchKkzMBjYF6jnkqh4R?usp=sharing)
 
+- VQA demo with [gptcache](https://github.com/zilliztech/GPTCache)
+
+Try out  image Q&A demo [vqa_demo.py](./vqa_demo.py), which will use MiniGPT-4 to generate answers, and then GPTCache to cache the answers.
+
+```
+python vqa_demo.py --cfg-path eval_configs/minigpt4_eval.yaml --gpu-id 0
+```
+
+The above command will use the exact match cache, i.e. map cache management method. When you ask the same image and question, it will hit the cache directly and return the answer quickly.
+
+If you want to use similar search cache, you can run `python vqa_demo.py --cfg-path eval_configs/minigpt4_eval.yaml  --gpu-id 0 --dir /path/to/workspace --no-map` to  disable map, which will use sqlite3 and faiss to manage the cache to search for similar images and questions in the cache.
+
 
 ### Training
 The training of MiniGPT-4 contains two alignment stages.

vqa_demo.py

@@ -0,0 +1,85 @@
+import argparse
+
+import gradio as gr
+
+# install gptcache with `pip install gptcache`
+from gptcache import cache
+from gptcache.processor.pre import get_image, get_image_question
+from gptcache.embedding import Timm
+from gptcache.similarity_evaluation.distance import SearchDistanceEvaluation
+from gptcache.manager.factory import manager_factory
+
+from gptcache.adapter.minigpt4 import MiniGPT4
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(description="Demo")
+    parser.add_argument("--cfg-path", required=True, help="path to configuration file.")
+    parser.add_argument("--gpu-id", type=int, default=0, help="specify the gpu to load the model.")
+    parser.add_argument("--dir", type=str, default=".", help="path for data storage.")
+    parser.add_argument("--map", action='store_true', help="use map for exact match cache.")
+    parser.add_argument('--no-map', dest='map', action='store_false', help="use sqlite and faiss for similar search cache.")
+    parser.set_defaults(map=True)
+    parser.add_argument(
+        "--options",
+        nargs="+",
+        help="override some settings in the used config, the key-value pair "
+             "in xxx=yyy format will be merged into config file (deprecate), "
+             "change to --cfg-options instead.",
+    )
+    args = parser.parse_args()
+    return args
+
+
+args = parse_args()
+
+print("Initializing GPTCache")
+if args.map:
+    data_manager = manager_factory("map", args.dir)
+    cache.init(
+        pre_embedding_func=get_image_question,
+        data_manager=data_manager
+    )  # init with map method
+else:
+    timm = Timm()
+    data_manager = manager_factory("sqlite,faiss", args.dir, vector_params={"dimension": timm.dimension})
+    cache.init(
+        pre_embedding_func=get_image,
+        data_manager=data_manager,
+        embedding_func=timm.to_embeddings,
+        similarity_evaluation=SearchDistanceEvaluation()
+    )
+print("GPTCache Initialization Finished")
+
+print("Initializing Chat")
+pipeline = MiniGPT4.from_pretrained(cfg_path=args.cfg_path, gpu_id=args.gpu_id, options=args.options, return_hit=True)
+print(" Chat Initialization Finished")
+
+
+# ========================================
+#             Gradio Setting
+# ========================================
+
+
+title = """<h1 align="center">Demo of MiniGPT-4 and GPTCache</h1>"""
+description = """<h3>This is the demo of MiniGPT-4 and GPTCache. Upload your images and ask question, and it will be cached.</h3>"""
+article = """<p><a href="https://github.com/zilliztech/GPTCache"><img src="https://img.shields.io/badge/Github-Code-blue"></a></p>"""
+
+# show examples below
+
+
+with gr.Blocks() as demo:
+    gr.Markdown(title)
+    gr.Markdown(description)
+    gr.Markdown(article)
+    with gr.Row():
+        with gr.Column():
+            inp0 = gr.Image(source="upload", type="filepath")
+            inp1 = gr.Textbox(label="Question")
+        with gr.Column():
+            out0 = gr.Textbox()
+            out1 = gr.Textbox(label="is hit")
+    btn = gr.Button("Submit")
+    btn.click(fn=pipeline, inputs=[inp0, inp1], outputs=[out0, out1])
+
+demo.launch(share=True)