80 lines
2.9 KiB
C++
80 lines
2.9 KiB
C++
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "SupportLibrary.h"
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#include <android-base/logging.h>
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#include <dlfcn.h>
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#include <cstring>
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#include <memory>
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#include <string>
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std::unique_ptr<const NnApiSupportLibrary> loadNnApiSupportLibrary(const std::string& libName) {
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void* libHandle = dlopen(libName.c_str(), RTLD_LAZY | RTLD_LOCAL | RTLD_NODELETE);
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if (libHandle == nullptr) {
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LOG(ERROR) << "nnapi error: unable to open library " << libName.c_str() << " " << dlerror();
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return nullptr;
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}
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auto result = loadNnApiSupportLibrary(libHandle);
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if (!result) {
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dlclose(libHandle);
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}
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return result;
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}
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std::unique_ptr<const NnApiSupportLibrary> loadNnApiSupportLibrary(void* libHandle) {
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NnApiSLDriverImpl* (*getSlDriverImpl)();
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getSlDriverImpl = reinterpret_cast<decltype(getSlDriverImpl)>(
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dlsym(libHandle, "ANeuralNetworks_getSLDriverImpl"));
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if (getSlDriverImpl == nullptr) {
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LOG(ERROR) << "Failed to find ANeuralNetworks_getSLDriverImpl symbol";
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return nullptr;
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}
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NnApiSLDriverImpl* impl = getSlDriverImpl();
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if (impl == nullptr) {
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LOG(ERROR) << "ANeuralNetworks_getSLDriverImpl returned nullptr";
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return nullptr;
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}
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if (impl->implFeatureLevel < ANEURALNETWORKS_FEATURE_LEVEL_5) {
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LOG(ERROR) << "Unsupported NnApiSLDriverImpl->implFeatureLevel: " << impl->implFeatureLevel;
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return nullptr;
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}
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if (impl->implFeatureLevel == ANEURALNETWORKS_FEATURE_LEVEL_5) {
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return std::make_unique<NnApiSupportLibrary>(*reinterpret_cast<NnApiSLDriverImplFL5*>(impl),
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libHandle);
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}
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if (impl->implFeatureLevel == ANEURALNETWORKS_FEATURE_LEVEL_6) {
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return std::make_unique<NnApiSupportLibrary>(*reinterpret_cast<NnApiSLDriverImplFL6*>(impl),
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libHandle);
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}
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if (impl->implFeatureLevel == ANEURALNETWORKS_FEATURE_LEVEL_7) {
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return std::make_unique<NnApiSupportLibrary>(*reinterpret_cast<NnApiSLDriverImplFL7*>(impl),
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libHandle);
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}
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if (impl->implFeatureLevel >= ANEURALNETWORKS_FEATURE_LEVEL_8) {
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return std::make_unique<NnApiSupportLibrary>(*reinterpret_cast<NnApiSLDriverImplFL8*>(impl),
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libHandle);
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}
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return nullptr;
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}
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