a8000/lib-algo/com_iflytop_a800_utils_ScanResultAnalysisAlgo.cpp

#include <jni.h>
#include "com_iflytop_a800_utils_ScanResultAnalysisAlgo.h"
#include "opt_algo.hpp"
using namespace opt_algo;
/*
 * Class:     com_dreamworks_boditech_utils_MyOptAlgo
 * Method:    calculate
 * Signature: ([FI)V
 */
JNIEXPORT jobject JNICALL Java_com_iflytop_a800_utils_ScanResultAnalysisAlgo_calculate(JNIEnv* env, jobject, jfloatArray data, jint peakNum) {
	jsize dataLen = env->GetArrayLength(data);
	jfloat * dataElements = env->GetFloatArrayElements(data, nullptr);
	
	vector<float> originVal;
	originVal.reserve(dataLen);
	for (int i = 0; i < dataLen; ++i) {
		originVal.push_back(dataElements[i]);
	}
	env->ReleaseFloatArrayElements(data, dataElements, JNI_ABORT);

	shared_ptr<AlgoResult> algoResult;
	algoResult = OptAlgo::calculate(originVal, peakNum);
	if (nullptr == algoResult) {
		return nullptr;
	}

	// setup result
	jclass resultClass = env->FindClass("com/iflytop/a800/utils/ScanResultAnalysisAlgo$AlgoResult");
	jmethodID resultConstructor = env->GetMethodID(resultClass, "<init>", "()V");
	jobject resultObject = env->NewObject(resultClass, resultConstructor);

	// peak num
	jfieldID resultPeakNumFieldID = env->GetFieldID(resultClass, "peakNum", "I");
	env->SetIntField(resultObject, resultPeakNumFieldID, algoResult->peakNum);

	// lineAvg250
	jfloatArray lineAvg250 = env->NewFloatArray(250);
	jfloat lineAvg250Values[250];
	for (int i = 0; i < 250; ++i) {
		lineAvg250Values[i] = algoResult->lineContext->avg250[i];
	}
	env->SetFloatArrayRegion(lineAvg250, 0, 250, lineAvg250Values);
	jfieldID lineAvg250FieldID = env->GetFieldID(resultClass, "lineAvg250", "[F");
	env->SetObjectField(resultObject, lineAvg250FieldID, lineAvg250);

	// PeakInfos
	jint maxPeakInfoCount = 5;
	jclass resultPeakInfoClass = env->FindClass("com/iflytop/a800/utils/ScanResultAnalysisAlgo$AlgoResult$PeakInfo");
    jobjectArray resultPeakInfoArray = env->NewObjectArray(maxPeakInfoCount, resultPeakInfoClass, nullptr);
	for (int i = 0; i < maxPeakInfoCount; ++i) {
		jmethodID resultPeakInfoConstructor = env->GetMethodID(resultPeakInfoClass, "<init>", "()V");
		jobject resultPeakInfo = env->NewObject(resultPeakInfoClass, resultPeakInfoConstructor);
		// findPeak
		jfieldID findPeakFieldID = env->GetFieldID(resultPeakInfoClass, "findPeak", "Z");
		env->SetBooleanField(resultPeakInfo, findPeakFieldID, algoResult->peakInfo[i]->find_peak ? JNI_TRUE : JNI_FALSE);
		// peakFullArea
		jfieldID peakFullAreaFieldID = env->GetFieldID(resultPeakInfoClass, "peakFullArea", "F");
		env->SetFloatField(resultPeakInfo, peakFullAreaFieldID, algoResult->peakInfo[i]->peak_full_area);
		// peakBaseLineArea
		jfieldID peakBaseLineAreaFieldID = env->GetFieldID(resultPeakInfoClass, "peakBaseLineArea", "F");
		env->SetFloatField(resultPeakInfo, peakBaseLineAreaFieldID, algoResult->peakInfo[i]->peak_base_line_area);
		// area
		jfieldID areaFieldID = env->GetFieldID(resultPeakInfoClass, "area", "F");
		env->SetFloatField(resultPeakInfo, areaFieldID, algoResult->peakInfo[i]->area);
		// peakPos
		jfieldID peakPosFieldID = env->GetFieldID(resultPeakInfoClass, "peakPos", "I");
		env->SetIntField(resultPeakInfo, peakPosFieldID, algoResult->peakInfo[i]->peak_pos);
		// peakStartPos
		jfieldID peakStartPosFieldID = env->GetFieldID(resultPeakInfoClass, "peakStartPos", "I");
		env->SetIntField(resultPeakInfo, peakStartPosFieldID, algoResult->peakInfo[i]->peak_start_pos);
		// peakEndPos
		jfieldID peakEndPosFieldID = env->GetFieldID(resultPeakInfoClass, "peakEndPos", "I");
		env->SetIntField(resultPeakInfo, peakEndPosFieldID, algoResult->peakInfo[i]->peak_end_pos);
		env->SetObjectArrayElement(resultPeakInfoArray, i, resultPeakInfo);
	}
	jfieldID resultPeakInfoFieldID = env->GetFieldID(resultClass, "peakInfos", "[Lcom/iflytop/a800/utils/ScanResultAnalysisAlgo$AlgoResult$PeakInfo;");
	env->SetObjectField(resultObject, resultPeakInfoFieldID, resultPeakInfoArray);

	return resultObject;
}