mirror of
https://github.com/android/ndk-samples
synced 2025-11-07 16:51:54 +08:00
83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
/**
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* Copyright 2017 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 <jni.h>
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#include <string>
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#include <iomanip>
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#include <sstream>
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#include <fcntl.h>
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#include <android/asset_manager_jni.h>
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#include <android/log.h>
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#include <android/sharedmem.h>
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#include <sys/mman.h>
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#include "simple_model.h"
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extern "C"
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JNIEXPORT jlong
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JNICALL
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Java_com_example_android_basic_MainActivity_initModel(
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JNIEnv *env,
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jobject /* this */,
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jobject _assetManager,
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jstring _assetName) {
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// Get the file descriptor of the model data file.
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AAssetManager *assetManager = AAssetManager_fromJava(env, _assetManager);
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const char *assetName = env->GetStringUTFChars(_assetName, NULL);
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AAsset *asset = AAssetManager_open(assetManager, assetName, AASSET_MODE_BUFFER);
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if(asset == nullptr) {
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__android_log_print(ANDROID_LOG_ERROR, LOG_TAG, "Failed to open the asset.");
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return 0;
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}
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env->ReleaseStringUTFChars(_assetName, assetName);
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SimpleModel* nn_model = new SimpleModel(asset);
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AAsset_close(asset);
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if (!nn_model->CreateCompiledModel()) {
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__android_log_print(ANDROID_LOG_ERROR, LOG_TAG,
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"Failed to prepare the model.");
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return 0;
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}
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return (jlong)(uintptr_t)nn_model;
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}
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extern "C"
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JNIEXPORT jfloat
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JNICALL
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Java_com_example_android_basic_MainActivity_startCompute(
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JNIEnv *env,
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jobject /* this */,
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jlong _nnModel,
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jfloat inputValue1,
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jfloat inputValue2) {
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SimpleModel* nn_model = (SimpleModel*) _nnModel;
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float result = 0.0f;
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nn_model->Compute(inputValue1, inputValue2, &result);
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return result;
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}
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extern "C"
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JNIEXPORT void
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JNICALL
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Java_com_example_android_basic_MainActivity_destroyModel(
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JNIEnv *env,
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jobject /* this */,
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jlong _nnModel) {
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SimpleModel* nn_model = (SimpleModel*) _nnModel;
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delete(nn_model);
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}
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