Process image in parallel (#1539)

python/sglang/srt/managers/image_processor.py

@@ -0,0 +1,187 @@
+# TODO: also move pad_input_ids into this module
+import asyncio
+import concurrent.futures
+import logging
+import multiprocessing as mp
+import os
+from abc import ABC, abstractmethod
+from typing import List, Optional, Union
+
+import numpy as np
+import transformers
+
+from sglang.srt.hf_transformers_utils import get_processor
+from sglang.srt.mm_utils import expand2square, process_anyres_image
+from sglang.srt.server_args import ServerArgs
+from sglang.srt.utils import load_image
+from sglang.utils import get_exception_traceback
+
+logger = logging.getLogger(__name__)
+
+global global_processor
+
+
+def init_global_processor(server_args: ServerArgs):
+    """Init the global processor for multi modal models."""
+    global global_processor
+    transformers.logging.set_verbosity_error()
+    global_processor = get_processor(
+        server_args.tokenizer_path,
+        tokenizer_mode=server_args.tokenizer_mode,
+        trust_remote_code=server_args.trust_remote_code,
+    )
+
+
+class BaseImageProcessor(ABC):
+    @abstractmethod
+    async def process_images_async(self, image_data, **kwargs):
+        pass
+
+
+class DummyImageProcessor(BaseImageProcessor):
+    async def process_images_async(self, *args, **kwargs):
+        return None
+
+
+class LlavaImageProcessor(BaseImageProcessor):
+    def __init__(self, hf_config, server_args, _image_processor):
+        self.hf_config = hf_config
+        self._image_processor = _image_processor
+        self.executor = concurrent.futures.ProcessPoolExecutor(
+            initializer=init_global_processor,
+            mp_context=mp.get_context("fork"),
+            initargs=(server_args,),
+            max_workers=os.environ.get("SGLANG_CPU_COUNT", os.cpu_count()),
+        )
+
+    @staticmethod
+    def _process_single_image_task(
+        image_data: Union[str, bytes],
+        image_aspect_ratio: Optional[str] = None,
+        image_grid_pinpoints: Optional[str] = None,
+        image_processor=None,
+    ):
+        image_processor = image_processor or global_processor.image_processor
+
+        try:
+            image, image_size = load_image(image_data)
+            if image_size is not None:
+                # It is a video with multiple images
+                image_hash = hash(image_data)
+                pixel_values = image_processor(image)["pixel_values"]
+                for _ in range(len(pixel_values)):
+                    pixel_values[_] = pixel_values[_].astype(np.float16)
+                pixel_values = np.stack(pixel_values, axis=0)
+                return pixel_values, image_hash, image_size
+            else:
+                # It is an image
+                image_hash = hash(image_data)
+                if image_aspect_ratio == "pad":
+                    image = expand2square(
+                        image,
+                        tuple(int(x * 255) for x in image_processor.image_mean),
+                    )
+                    pixel_values = image_processor(image.convert("RGB"))[
+                        "pixel_values"
+                    ][0]
+                elif image_aspect_ratio == "anyres" or (
+                    image_aspect_ratio is not None
+                    and "anyres_max" in image_aspect_ratio
+                ):
+                    pixel_values = process_anyres_image(
+                        image, image_processor, image_grid_pinpoints
+                    )
+                else:
+                    pixel_values = image_processor(image)["pixel_values"][0]
+
+                if isinstance(pixel_values, np.ndarray):
+                    pixel_values = pixel_values.astype(np.float16)
+
+                return pixel_values, image_hash, image.size
+        except Exception:
+            logger.error("Exception in TokenizerManager:\n" + get_exception_traceback())
+
+    async def _process_single_image(
+        self, image_data: Union[bytes, str], aspect_ratio: str, grid_pinpoints: str
+    ):
+        if self.executor is not None:
+            loop = asyncio.get_event_loop()
+            return await loop.run_in_executor(
+                self.executor,
+                LlavaImageProcessor._process_single_image_task,
+                image_data,
+                aspect_ratio,
+                grid_pinpoints,
+            )
+        else:
+            return self._process_single_image_task(
+                image_data, aspect_ratio, grid_pinpoints
+            )
+
+    async def process_images_async(
+        self, image_data: List[Union[str, bytes]], request_obj
+    ):
+        if not image_data:
+            return None
+
+        aspect_ratio = getattr(self.hf_config, "image_aspect_ratio", None)
+        grid_pinpoints = (
+            self.hf_config.image_grid_pinpoints
+            if hasattr(self.hf_config, "image_grid_pinpoints")
+            and "anyres" in aspect_ratio
+            else None
+        )
+
+        if isinstance(image_data, list) and len(image_data) > 0:
+            # Multiple images
+            if len(image_data) > 1:
+                aspect_ratio = "pad"  # LLaVA OneVision Handling: more than one image --> interleaved image mode or video mode. We do not use anyres
+                pixel_values, image_hashes, image_sizes = [], [], []
+                res = []
+                for img_data in image_data:
+                    res.append(
+                        self._process_single_image(
+                            img_data, aspect_ratio, grid_pinpoints
+                        )
+                    )
+                res = await asyncio.gather(*res)
+                for pixel_v, image_h, image_s in res:
+                    pixel_values.append(pixel_v)
+                    image_hashes.append(image_h)
+                    image_sizes.append(image_s)
+
+                if isinstance(pixel_values[0], np.ndarray):
+                    pixel_values = np.stack(pixel_values, axis=0)
+            else:
+                # A single image
+                pixel_values, image_hash, image_size = await self._process_single_image(
+                    image_data[0], aspect_ratio, grid_pinpoints
+                )
+                image_hashes = [image_hash]
+                image_sizes = [image_size]
+        elif isinstance(image_data, str):
+            # A single image
+            pixel_values, image_hash, image_size = await self._process_single_image(
+                image_data, aspect_ratio, grid_pinpoints
+            )
+            image_hashes = [image_hash]
+            image_sizes = [image_size]
+        else:
+            raise ValueError(f"Invalid image data: {image_data}")
+
+        return {
+            "pixel_values": pixel_values,
+            "image_hashes": image_hashes,
+            "image_sizes": image_sizes,
+            "modalities": request_obj.modalities,
+        }
+
+
+def get_image_processor(
+    hf_config, server_args: ServerArgs, _image_processor
+) -> BaseImageProcessor:
+    return LlavaImageProcessor(hf_config, server_args, _image_processor)
+
+
+def get_dummy_image_processor():
+    return DummyImageProcessor()