feat: gradio demo integration (#16)

Co-authored-by: Bo Liu <benjaminliu.eecs@gmail.com>
Co-authored-by: Haoyu Lu <ruclhy1998@163.com>

deepseek_vl/serve/inference.py

@@ -0,0 +1,168 @@
+# Copyright (c) 2023-2024 DeepSeek.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy of
+# this software and associated documentation files (the "Software"), to deal in
+# the Software without restriction, including without limitation the rights to
+# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+# the Software, and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+from threading import Thread
+from typing import List
+
+import torch
+import transformers
+from transformers import (
+    AutoModelForCausalLM,
+    StoppingCriteria,
+    StoppingCriteriaList,
+    TextIteratorStreamer,
+)
+
+from deepseek_vl.models import MultiModalityCausalLM, VLChatProcessor
+from deepseek_vl.utils.conversation import Conversation
+
+
+def load_model(model_path):
+    vl_chat_processor: VLChatProcessor = VLChatProcessor.from_pretrained(model_path)
+    tokenizer = vl_chat_processor.tokenizer
+    vl_gpt: MultiModalityCausalLM = AutoModelForCausalLM.from_pretrained(
+        model_path, trust_remote_code=True
+    )
+    vl_gpt = vl_gpt.to(torch.bfloat16).cuda().eval()
+    return tokenizer, vl_gpt, vl_chat_processor
+
+
+def convert_conversation_to_prompts(conversation: Conversation):
+    prompts = []
+    messages = conversation.messages
+
+    for i in range(0, len(messages), 2):
+        prompt = {
+            "role": messages[i][0],
+            "content": messages[i][1][0]
+            if isinstance(messages[i][1], tuple)
+            else messages[i][1],
+            "images": [messages[i][1][1]] if isinstance(messages[i][1], tuple) else [],
+        }
+        response = {"role": messages[i + 1][0], "content": messages[i + 1][1]}
+        prompts.extend([prompt, response])
+
+    return prompts
+
+
+class StoppingCriteriaSub(StoppingCriteria):
+    def __init__(self, stops=[], encounters=1):
+        super().__init__()
+        self.stops = [stop.to("cuda") for stop in stops]
+
+    def __call__(
+        self, input_ids: torch.LongTensor, scores: torch.FloatTensor, **kwargs
+    ):
+        for stop in self.stops:
+            if input_ids.shape[-1] < len(stop):
+                continue
+            if torch.all((stop == input_ids[0][-len(stop) :])).item():
+                return True
+
+        return False
+
+
+@torch.inference_mode()
+def deepseek_generate(
+    prompts: list,
+    vl_gpt: torch.nn.Module,
+    vl_chat_processor,
+    tokenizer: transformers.PreTrainedTokenizer,
+    stop_words: list,
+    max_length: int = 256,
+    temperature: float = 1.0,
+    top_p: float = 1.0,
+    repetition_penalty=1.1,
+):
+    prompts = prompts
+    pil_images = list()
+    for message in prompts:
+        if "images" not in message:
+            continue
+        for pil_img in message["images"]:
+            pil_images.append(pil_img)
+
+    prepare_inputs = vl_chat_processor(
+        conversations=prompts, images=pil_images, force_batchify=True
+    ).to(vl_gpt.device)
+
+    return generate(
+        vl_gpt,
+        tokenizer,
+        prepare_inputs,
+        max_length,
+        temperature,
+        repetition_penalty,
+        top_p,
+        stop_words,
+    )
+
+
+@torch.inference_mode()
+def generate(
+    vl_gpt,
+    tokenizer,
+    prepare_inputs,
+    max_gen_len: int = 256,
+    temperature: float = 0,
+    repetition_penalty=1.1,
+    top_p: float = 0.95,
+    stop_words: List[str] = [],
+):
+    """Stream the text output from the multimodality model with prompt and image inputs."""
+    inputs_embeds = vl_gpt.prepare_inputs_embeds(**prepare_inputs)
+
+    streamer = TextIteratorStreamer(tokenizer)
+
+    stop_words_ids = [
+        torch.tensor(tokenizer.encode(stop_word)) for stop_word in stop_words
+    ]
+    stopping_criteria = StoppingCriteriaList(
+        [StoppingCriteriaSub(stops=stop_words_ids)]
+    )
+
+    generation_config = dict(
+        inputs_embeds=inputs_embeds,
+        attention_mask=prepare_inputs.attention_mask,
+        pad_token_id=tokenizer.eos_token_id,
+        bos_token_id=tokenizer.bos_token_id,
+        eos_token_id=tokenizer.eos_token_id,
+        max_new_tokens=max_gen_len,
+        do_sample=True,
+        use_cache=True,
+        streamer=streamer,
+        stopping_criteria=stopping_criteria,
+    )
+
+    if temperature > 0:
+        generation_config.update(
+            {
+                "do_sample": True,
+                "top_p": top_p,
+                "temperature": temperature,
+                "repetition_penalty": repetition_penalty,
+            }
+        )
+    else:
+        generation_config["do_sample"] = False
+
+    thread = Thread(target=vl_gpt.language_model.generate, kwargs=generation_config)
+    thread.start()
+
+    yield from streamer