1 /* 2 * Copyright (C) 2021 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 ANDROID_PACKAGES_MODULES_NEURALNETWORKS_SL_SUPPORT_LIBRARY_H 18 #define ANDROID_PACKAGES_MODULES_NEURALNETWORKS_SL_SUPPORT_LIBRARY_H 19 20 #include <memory> 21 #include <string> 22 23 #include "NeuralNetworksSupportLibraryImpl.h" 24 #include "NeuralNetworksTypes.h" 25 26 #ifndef __NNAPI_FL5_MIN_ANDROID_API__ 27 #define __NNAPI_FL5_MIN_ANDROID_API__ __ANDROID_API_S__ 28 #endif 29 30 /** 31 * Helper struct, derived from the latest NnApiSLDriverImpl. 32 * 33 * Owns the .so handle, and will close it in destructor. 34 * Sets proper implStructFeatureLevel in constructor. 35 * 36 * It's derived from the latest NnApiSLDriverImplFL* struct, 37 * so it contains all possible functionality. 38 * 39 * When a new NnApiSLDriverImpl is introduced, this class 40 * has to switch base class to it and provide constructors for 41 * all existing NnApiSLDriverImplFL* structs. 42 * 43 * There's expectation that for M>N, NnApiSLDriverImplFL(M) is 44 * a strict superset of NnApiSLDriverImplFL(N), and *NnApiSLDriverImplFL(M) can 45 * be reinterpret_cast to *NnApiSLDriverImplFL(N) safely. 46 * 47 * The base->implFeatureLevel is set to the actual Feature Level 48 * implemented by the SLDriverImpl, 49 */ 50 struct NnApiSupportLibrary : NnApiSLDriverImplFL5 { 51 NnApiSupportLibrary(const NnApiSLDriverImplFL5& impl, void* libHandle); 52 ~NnApiSupportLibrary(); 53 54 void* libHandle = nullptr; 55 }; 56 57 /** 58 * Loads the NNAPI support library. 59 * The NnApiSupportLibrary structure is filled with all the pointers. If one 60 * function doesn't exist, a null pointer is stored. 61 */ 62 std::unique_ptr<const NnApiSupportLibrary> loadNnApiSupportLibrary(const std::string& libName); 63 std::unique_ptr<const NnApiSupportLibrary> loadNnApiSupportLibrary(void* libHandle); 64 65 #endif // ANDROID_PACKAGES_MODULES_NEURALNETWORKS_SL_SUPPORT_LIBRARY_H 66