fastdeploy support serving (#272)

* fd support serving

* fd support serving optimize dir

* optimize code

Co-authored-by: Jason <jiangjiajun@baidu.com>

python/fastdeploy/vision/utils.py

@@ -0,0 +1,49 @@
+# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from __future__ import absolute_import
+import json
+from .. import c_lib_wrap as C
+
+
+def mask_to_json(result):
+    r_json = {
+        "data": result.data,
+        "shape": result.shape,
+    }
+    return json.dumps(r_json)
+
+
+def detection_to_json(result):
+    masks = []
+    for mask in result.masks:
+        masks.append(mask_to_json(mask))
+    r_json = {
+        "boxes": result.boxes,
+        "scores": result.scores,
+        "label_ids": result.label_ids,
+        "masks": masks,
+        "contain_masks": result.contain_masks
+    }
+    return json.dumps(r_json)
+
+
+def fd_result_to_json(result):
+    if isinstance(result, C.vision.DetectionResult):
+        return detection_to_json(result)
+    elif isinstance(result, C.vision.Mask):
+        return mask_to_json(result)
+    else:
+        assert False, "{} Conversion to JSON format is not supported".format(
+            type(result))
+    return {}