refactor preprocess to use EagerModelBase

ghstack-source-id: d2ac7e1
Pull Request resolved: #6530

Author: lucylq

examples/models/llama3_2_vision/preprocess/export_preprocess.py

@@ -5,28 +5,47 @@
 # LICENSE file in the root directory of this source tree.
 
 import torch
-from executorch.examples.models.llama3_2_vision.preprocess.export_preprocess_lib import (
-    export_preprocess,
-    get_example_inputs,
-    lower_to_executorch_preprocess,
+from executorch.examples.models.llama3_2_vision.preprocess.model import (
+    CLIPImageTransformModel,
+    PreprocessConfig,
 )
+from executorch.exir import EdgeCompileConfig, to_edge
 
 
 def main():
+    # Eager model.
+    model = CLIPImageTransformModel(PreprocessConfig())
 
-    # ExecuTorch
-    ep_et = export_preprocess()
-    et = lower_to_executorch_preprocess(ep_et)
-    with open("preprocess_et.pte", "wb") as file:
-        et.write_to_file(file)
-
-    # AOTInductor
-    ep_aoti = export_preprocess()
-    torch._inductor.aot_compile(
-        ep_aoti.module(),
-        get_example_inputs(),
-        options={"aot_inductor.output_path": "preprocess_aoti.so"},
+    # Export.
+    ep = torch.export.export(
+        model.get_eager_model(),
+        model.get_example_inputs(),
+        dynamic_shapes=model.get_dynamic_shapes(),
+        strict=False,
+    )
+
+    # Executorch
+    edge_program = to_edge(
+        ep, compile_config=EdgeCompileConfig(_check_ir_validity=False)
     )
+    et_program = edge_program.to_executorch()
+    with open("preprocess_et.pte", "wb") as file:
+        et_program.write_to_file(file)
+
+    # Export.
+    # ep = torch.export.export(
+    #     model.get_eager_model(),
+    #     model.get_example_inputs(),
+    #     dynamic_shapes=model.get_dynamic_shapes(),
+    #     strict=False,
+    # )
+    #
+    # # AOTInductor
+    # torch._inductor.aot_compile(
+    #     ep.module(),
+    #     model.get_example_inputs(),
+    #     options={"aot_inductor.output_path": "preprocess_aoti.so"},
+    # )
 
 
 if __name__ == "__main__":

examples/models/llama3_2_vision/preprocess/export_preprocess_lib.py

@@ -0,0 +1,69 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+# pyre-unsafe
+
+from dataclasses import dataclass
+from typing import Dict, List, Optional, Tuple
+
+import torch
+
+from executorch.extension.llm.custom_ops import op_tile_crop_aot  # noqa
+from torch.export import Dim
+from torchtune.models.clip.inference._transform import _CLIPImageTransform
+
+from ...model_base import EagerModelBase
+
+
+@dataclass
+class PreprocessConfig:
+    image_mean: Optional[List[float]] = None
+    image_std: Optional[List[float]] = None
+    resample: str = "bilinear"
+    max_num_tiles: int = 4
+    tile_size: int = 224
+    antialias: bool = False
+
+
+class CLIPImageTransformModel(EagerModelBase):
+    def __init__(
+        self,
+        config: PreprocessConfig,
+    ):
+        super().__init__()
+
+        # Eager model.
+        self.model = _CLIPImageTransform(
+            image_mean=config.image_mean,
+            image_std=config.image_std,
+            resample=config.resample,
+            max_num_tiles=config.max_num_tiles,
+            tile_size=config.tile_size,
+            antialias=config.antialias,
+        )
+
+        # Replace non-exportable ops with custom ops.
+        self.model.tile_crop = torch.ops.preprocess.tile_crop.default
+
+    def get_eager_model(self) -> torch.nn.Module:
+        return self.model
+
+    def get_example_inputs(self) -> Tuple[torch.Tensor, torch.Tensor, torch.Tensor]:
+        image = torch.ones(3, 800, 600)
+        target_size = torch.tensor([448, 336])
+        canvas_size = torch.tensor([448, 448])
+        return (image, target_size, canvas_size)
+
+    def get_dynamic_shapes(self) -> Dict[str, Dict[int, Dim]]:
+        img_h = Dim("img_h", min=1, max=4000)
+        img_w = Dim("img_w", min=1, max=4000)
+
+        dynamic_shapes = {
+            "image": {1: img_h, 2: img_w},
+            "target_size": None,
+            "canvas_size": None,
+        }
+        return dynamic_shapes