Move cpp code to directory csrcs (#42)

* move cpp code to csrcs

* move cpp code to csrcs

fastdeploy/vision/utils/utils.h

@@ -1,65 +0,0 @@
-// 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.
-
-#pragma once
-
-#include <set>
-#include <vector>
-#include "fastdeploy/core/fd_tensor.h"
-#include "fastdeploy/utils/utils.h"
-#include "fastdeploy/vision/common/result.h"
-
-namespace fastdeploy {
-namespace vision {
-namespace utils {
-// topk sometimes is a very small value
-// so this implementation is simple but I don't think it will
-// cost too much time
-// Also there may be cause problem since we suppose the minimum value is
-// -99999999
-// Do not use this function on array which topk contains value less than
-// -99999999
-template <typename T>
-std::vector<int32_t> TopKIndices(const T* array, int array_size, int topk) {
-  topk = std::min(array_size, topk);
-  std::vector<int32_t> res(topk);
-  std::set<int32_t> searched;
-  for (int32_t i = 0; i < topk; ++i) {
-    T min = -99999999;
-    for (int32_t j = 0; j < array_size; ++j) {
-      if (searched.find(j) != searched.end()) {
-        continue;
-      }
-      if (*(array + j) > min) {
-        res[i] = j;
-        min = *(array + j);
-      }
-    }
-    searched.insert(res[i]);
-  }
-  return res;
-}
-
-void NMS(DetectionResult* output, float iou_threshold = 0.5);
-
-void NMS(FaceDetectionResult* result, float iou_threshold = 0.5);
-
-// MergeSort
-void SortDetectionResult(DetectionResult* output);
-
-void SortDetectionResult(FaceDetectionResult* result);
-
-}  // namespace utils
-}  // namespace vision
-}  // namespace fastdeploy