llama : support input embeddings directly (#1910)

* add interface for float input

* fixed inpL shape and type

* add examples of input floats

* add test example for embd input

* fixed sampling

* add free for context

* fixed add end condition for generating

* add examples for llava.py

* add READMD for llava.py

* add READMD for llava.py

* add example of PandaGPT

* refactor the interface and fixed the styles

* add cmake build for embd-input

* add cmake build for embd-input

* Add MiniGPT-4 example

* change the order of the args of llama_eval_internal

* fix ci error

examples/embd-input/panda_gpt.py

@@ -0,0 +1,98 @@
+import sys
+import os
+sys.path.insert(0, os.path.dirname(__file__))
+from embd_input import MyModel
+import numpy as np
+from torch import nn
+import torch
+
+# use PandaGPT path
+panda_gpt_path = os.path.join(os.path.dirname(__file__), "PandaGPT")
+imagebind_ckpt_path = "./models/panda_gpt/"
+
+sys.path.insert(0, os.path.join(panda_gpt_path,"code","model"))
+from ImageBind.models import imagebind_model
+from ImageBind import data
+
+ModalityType = imagebind_model.ModalityType
+max_tgt_len = 400
+
+class PandaGPT:
+    def __init__(self, args):
+        self.visual_encoder,_ = imagebind_model.imagebind_huge(pretrained=True, store_path=imagebind_ckpt_path)
+        self.visual_encoder.eval()
+        self.llama_proj = nn.Linear(1024, 5120) # self.visual_hidden_size, 5120)
+        self.max_tgt_len = max_tgt_len
+        self.model = MyModel(["main", *args])
+        self.generated_text = ""
+        self.device = "cpu"
+
+    def load_projection(self, path):
+        state = torch.load(path, map_location="cpu")
+        self.llama_proj.load_state_dict({
+            "weight": state["llama_proj.weight"],
+            "bias": state["llama_proj.bias"]})
+
+    def eval_inputs(self, inputs):
+        self.model.eval_string("<Img>")
+        embds = self.extract_multimoal_feature(inputs)
+        for i in embds:
+            self.model.eval_float(i.T)
+        self.model.eval_string("</Img> ")
+
+    def chat(self, question):
+        return self.chat_with_image(None, question)
+
+    def chat_with_image(self, inputs, question):
+        if self.generated_text == "":
+            self.model.eval_string("###")
+        self.model.eval_string(" Human: ")
+        if inputs:
+            self.eval_inputs(inputs)
+        self.model.eval_string(question)
+        self.model.eval_string("\n### Assistant:")
+        ret = self.model.generate_with_print(end="###")
+        self.generated_text += ret
+        return ret
+
+    def extract_multimoal_feature(self, inputs):
+        features = []
+        for key in ["image", "audio", "video", "thermal"]:
+            if key + "_paths" in inputs:
+                embeds = self.encode_data(key, inputs[key+"_paths"])
+                features.append(embeds)
+        return features
+
+    def encode_data(self, data_type, data_paths):
+
+        type_map = {
+            "image": ModalityType.VISION,
+            "audio": ModalityType.AUDIO,
+            "video": ModalityType.VISION,
+            "thermal": ModalityType.THERMAL,
+        }
+        load_map = {
+            "image": data.load_and_transform_vision_data,
+            "audio": data.load_and_transform_audio_data,
+            "video": data.load_and_transform_video_data,
+            "thermal": data.load_and_transform_thermal_data
+        }
+
+        load_function = load_map[data_type]
+        key = type_map[data_type]
+
+        inputs = {key: load_function(data_paths, self.device)}
+        with torch.no_grad():
+            embeddings = self.visual_encoder(inputs)
+            embeds = embeddings[key]
+            embeds = self.llama_proj(embeds).cpu().numpy()
+        return embeds
+
+
+if __name__=="__main__":
+    a = PandaGPT(["--model", "./models/ggml-vicuna-13b-v0-q4_1.bin", "-c", "2048", "--lora", "./models/panda_gpt/ggml-adapter-model.bin","--temp", "0"])
+    a.load_projection("./models/panda_gpt/adapter_model.bin")
+    a.chat_with_image(
+        {"image_paths": ["./media/llama1-logo.png"]},
+        "what is the text in the picture? 'llama' or 'lambda'?")
+    a.chat("what is the color of it?")