1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef V4L2_CAMERA_HAL_ARRAY_VECTOR_H_ 18 #define V4L2_CAMERA_HAL_ARRAY_VECTOR_H_ 19 20 #include <array> 21 #include <vector> 22 23 namespace v4l2_camera_hal { 24 // ArrayVector behaves like a std::vector of fixed length C arrays, 25 // with push_back accepting std::arrays to standardize length. 26 // Specific methods to get number of arrays/number of elements 27 // are provided and an ambiguous "size" is not, to avoid accidental 28 // incorrect use. 29 template <class T, size_t N> 30 class ArrayVector { 31 public: 32 const T* data() const { return mItems.data(); } 33 // The number of arrays. 34 size_t num_arrays() const { return mItems.size() / N; } 35 // The number of elements amongst all arrays. 36 size_t total_num_elements() const { return mItems.size(); } 37 38 // Access the ith array. 39 const T* operator[](int i) const { return mItems.data() + (i * N); } 40 T* operator[](int i) { return mItems.data() + (i * N); } 41 42 void push_back(const std::array<T, N>& values) { 43 mItems.insert(mItems.end(), values.begin(), values.end()); 44 } 45 46 private: 47 std::vector<T> mItems; 48 }; 49 50 } // namespace v4l2_camera_hal 51 52 #endif // V4L2_CAMERA_HAL_ARRAY_VECTOR_H_ 53
