[Hackthon_4th 242] Support en_ppstructure_mobile_v2.0_SLANet (#1816)

* first draft

* update api name

* fix bug

* fix bug and

* fix bug in c api

* fix bug in c_api

---------

Co-authored-by: DefTruth <31974251+DefTruth@users.noreply.github.com>

examples/vision/ocr/PP-OCR/cpu-gpu/cpp/infer_structurev2_table.cc

@@ -0,0 +1,74 @@
+// 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.
+
+#include "fastdeploy/vision.h"
+#ifdef WIN32
+const char sep = '\\';
+#else
+const char sep = '/';
+#endif
+
+void InitAndInfer(const std::string &table_model_dir,
+                  const std::string &image_file,
+                  const std::string &table_char_dict_path,
+                  const fastdeploy::RuntimeOption &option) {
+  auto table_model_file = table_model_dir + sep + "inference.pdmodel";
+  auto table_params_file = table_model_dir + sep + "inference.pdiparams";
+  auto table_option = option;
+
+  auto table_model = fastdeploy::vision::ocr::StructureV2Table(
+      table_model_file, table_params_file, table_char_dict_path, table_option);
+  assert(table_model.Initialized());
+
+  auto im = cv::imread(image_file);
+  auto im_bak = im.clone();
+
+  fastdeploy::vision::OCRResult result;
+  if (!table_model.Predict(im, &result)) {
+    std::cerr << "Failed to predict." << std::endl;
+    return;
+  }
+
+  std::cout << result.Str() << std::endl;
+}
+
+int main(int argc, char *argv[]) {
+  if (argc < 5) {
+    std::cout << "Usage: infer_demo path/to/table_model path/to/image  "
+                 "path/to/table_dict_path"
+                 "run_option, "
+                 "e.g ./infer_structurev2_table ch_ppocr_mobile_v2.0_cls_infer "
+                 "table.jpg table_structure_dict.txt 0"
+              << std::endl;
+    std::cout << "The data type of run_option is int, 0: run with cpu; 1: run "
+                 "with gpu;."
+              << std::endl;
+    return -1;
+  }
+
+  fastdeploy::RuntimeOption option;
+  int flag = std::atoi(argv[4]);
+
+  if (flag == 0) {
+    option.UseCpu();
+  } else if (flag == 1) {
+    option.UseGpu();
+  }
+
+  std::string table_model_dir = argv[1];
+  std::string test_image = argv[2];
+  std::string table_char_dict_path = argv[3];
+  InitAndInfer(table_model_dir, test_image, table_char_dict_path, option);
+  return 0;
+}