项目总结25:海康威视SDK-Java二次开发-客流量分析

前言

  本来一个很简单的SDK接口对接,折腾了好久;总结下原因有:

  1. 海康的SDK底层使用C++写的,我不熟悉C++;
  2. 海康Java源码示例写的是一个Swing桌面应用,我需要的是嵌入到web项目;
  3. 海康《设备网络SDK使用手册》中的示例是用C++写的;并且会出现使用手册和Java源码示例版本不匹配的情况(用手册版本高于Java源码示例版)  

我的需求

  1. 统计一个出入口的实时进出客流量;即将摄像头产生的数据 抓取出来保存到业务数据库
  2. SDK版本:6.0.2.35

准备工作

  1. 海康摄像头iDS-2CD681XYZUV-ABD/C;并已经现场安装成功;
  2. 海康的SDK,下载地址(win64):https://www.hikvision.com/cn/download_more_570.html;后面用到的全部文档和参考源码全部在SDK文档中

代码处理

  1. 将SDK开发包【库文件】里的HCNetSDK.dll、HCCore.dll、PlayCtrl.dll、SuperRender.dll、AudioRender.dll、HCNetSDKCom文件夹、ssleay32.dll、libeay32.dll文件均要加载到程序里面,【HCNetSDKCom文件夹】(包含里面的功能组件dll库文件)需要和HCNetSDK.dll、HCCore.dll一起加载,放在同一个目录下(我的事springboot项目,放在resources目录下),且HCNetSDKCom文件夹名不能修改。
  2. 将路径:Demo示例\4- Java 开发示例\2-报警布防监听\AlarmJavaDemo\src\alarmjavademo下的HCNetSDK类植入到项目中;
  3. 修改HCNetSDK类中的HCNetSDK加载的路径,否则会报无法加载HCNetSDK.dll错误;
        HCNetSDK INSTANCE = (HCNetSDK) Native.loadLibrary("HCNetSDK",
                HCNetSDK.class);
    
    
    改成
    
        String path=(HCNetSDK.class.getResource("/").getPath()).replaceAll("%20", " ").substring(1).replace("/", "\\")+"HCNetSDK.dll";
        HCNetSDK INSTANCE = (HCNetSDK) Native.loadLibrary(path,
                HCNetSDK.class); 
  4. 写MemberFlowUploadService类,实现数据的抓取(见业务源码1);代码逻辑说明,可参考《设备网络SDK使用手册》-编程导引-客流量功模块的示例说明
  5. 写MemberFlowUPloadCallBackImpl类,即回调函数(见业务源码2);回调函数的实现,我参考书hideSDK中的Demo示例\4- Java 开发示例\2-报警布防监听\AlarmJavaDemo\src\alarmjavademo下的AlarmJavaDemoView类
  6. 控制台结果输出    
进入回调了
sAlarmType---》lCommand=4355:客流量统计,进入人数:78,离开人数:83, byMode:0, dwRelativeTime:1298991096, dwAbsTime:1298991096
进入回调了
sAlarmType---》lCommand=4355:客流量统计,进入人数:0,离开人数:1, byMode:1, tmStart:20190522163123,tmEnd :20190522163200
进入回调了
sAlarmType---》lCommand=4355:客流量统计,进入人数:79,离开人数:83, byMode:0, dwRelativeTime:1298991115, dwAbsTime:1298991115  

 

源码分析

源码1:MemberFlowUploadService类

package com.hs.api.service.haikang.meberflow;

import org.springframework.stereotype.Service;
import java.util.Timer;
import java.util.TimerTask;


@Service
public class MemberFlowUploadService{


    static HCNetSDK hCNetSDK = HCNetSDK.INSTANCE;
    static HCNetSDK.NET_DVR_USER_LOGIN_INFO m_strLoginInfo = new HCNetSDK.NET_DVR_USER_LOGIN_INFO();//设备登录信息
    static HCNetSDK.NET_DVR_DEVICEINFO_V40 m_strDeviceInfo = new HCNetSDK.NET_DVR_DEVICEINFO_V40();//设备信息
    static String m_sDeviceIP = "192.168.1.X";//已登录设备的IP地址
    static String m_sUsername = "XXX";//设备用户名
    static String m_sPassword = "XXXXXX";//设备密码
    static short m_sPort = 8000;//端口号

    public  void initMemberFlowUpload(int remainMinuteTime){
        // 初始化
        hCNetSDK.NET_DVR_Init();
        //设置连接时间与重连时间
        hCNetSDK.NET_DVR_SetConnectTime(2000, 1);
        hCNetSDK.NET_DVR_SetReconnect(10000, true);
        // 注册设备-登录参数,包括设备地址、登录用户、密码等
        m_strLoginInfo.sDeviceAddress = new byte[HCNetSDK.NET_DVR_DEV_ADDRESS_MAX_LEN];
        System.arraycopy(m_sDeviceIP.getBytes(), 0, m_strLoginInfo.sDeviceAddress, 0, m_sDeviceIP.length());
        m_strLoginInfo.sUserName = new byte[HCNetSDK.NET_DVR_LOGIN_USERNAME_MAX_LEN];
        System.arraycopy(m_sUsername.getBytes(), 0, m_strLoginInfo.sUserName, 0, m_sUsername.length());
        m_strLoginInfo.sPassword = new byte[HCNetSDK.NET_DVR_LOGIN_PASSWD_MAX_LEN];
        System.arraycopy(m_sPassword.getBytes(), 0, m_strLoginInfo.sPassword, 0, m_sPassword.length());
        m_strLoginInfo.wPort = m_sPort;
        m_strLoginInfo.bUseAsynLogin = false; //是否异步登录:0- 否,1- 是
        m_strLoginInfo.write();
        //设备信息, 输出参数
        int lUserID = hCNetSDK.NET_DVR_Login_V40(m_strLoginInfo,m_strDeviceInfo);
        System.out.println("lUserID.size-->" + lUserID);
        if(lUserID< 0){
            System.out.println("hCNetSDK.NET_DVR_Login_V30()"+"\n" +hCNetSDK.NET_DVR_GetErrorMsg(null));
            hCNetSDK.NET_DVR_Cleanup();
            return;
        }
        //设置报警回调函数
        hCNetSDK.NET_DVR_SetDVRMessageCallBack_V31(new MemberFlowUPloadCallBackImpl(),null );
        //启用布防-其他报警布防参数不需要设置,不支持
        HCNetSDK.NET_DVR_SETUPALARM_PARAM lpSetupParam = new HCNetSDK.NET_DVR_SETUPALARM_PARAM();
        lpSetupParam.dwSize = 0;
        int lAlarmHandle = hCNetSDK.NET_DVR_SetupAlarmChan_V41(lUserID,lpSetupParam);
        if (lAlarmHandle< 0)
        {
            System.out.println("NET_DVR_SetupAlarmChan_V41 error, %d\n"+hCNetSDK.NET_DVR_GetLastError());
            hCNetSDK.NET_DVR_Logout(lUserID);
            hCNetSDK.NET_DVR_Cleanup();
            return;
        }
        //等待过程中,如果设备上传报警信息,在报警回调函数里面接收和处理报警信息
        Timer timer = new Timer();// 实例化Timer类
        timer.schedule(new TimerTask() {
            public void run() {
                //撤销布防上传通道
                if (! hCNetSDK.NET_DVR_CloseAlarmChan_V30(lAlarmHandle))
                {
                    System.out.println("! hCNetSDK.NET_DVR_CloseAlarmChan_V31(lAlarmHandle)\n"+ hCNetSDK.NET_DVR_GetLastError() +"\n" +hCNetSDK.NET_DVR_GetErrorMsg(null) );
                    hCNetSDK.NET_DVR_Logout(lUserID);
                    hCNetSDK. NET_DVR_Cleanup();
                    return;
                }

                //注销用户
                hCNetSDK.NET_DVR_Logout(lUserID);
                //释放SDK资源
                hCNetSDK.NET_DVR_Cleanup();
                this.cancel();
                System.gc();//主动回收垃圾
            }
        }, remainMinuteTime * 60 * 1000 );// 这里毫秒
    }
}

 

 源码2:MemberFlowUPloadCallBackImpl类

package com.hs.api.service.haikang.meberflow;

import com.hs.dao.entity.saichang.statistics.StatisticsMemberInOut;
import com.hs.dao.service.impl.saichang.statistics.StatisticsMemberInOutService;
import com.sun.jna.Pointer;
import org.springframework.beans.factory.annotation.Autowired;

import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.Level;
import java.util.logging.Logger;


public class MemberFlowUPloadCallBackImpl implements HCNetSDK.FMSGCallBack_V31 {

    @Autowired
    private StatisticsMemberInOutService statisticsMemberInOutService;


    @Override
    public boolean invoke(int lCommand, HCNetSDK.NET_DVR_ALARMER pAlarmer, Pointer pAlarmInfo, int dwBufLen, Pointer pUser) {
        System.out.println("进入回调了");
        try {
                String sAlarmType = new String();
                //报警时间
                Date today = new Date();
                DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
                String[] sIP = new String[2];

                sAlarmType = new String("lCommand=") + lCommand;
                //lCommand是传的报警类型
                HCNetSDK.NET_DVR_PDC_ALRAM_INFO strPDCResult = new HCNetSDK.NET_DVR_PDC_ALRAM_INFO();
                strPDCResult.write();
                Pointer pPDCInfo = strPDCResult.getPointer();
                pPDCInfo.write(0, pAlarmInfo.getByteArray(0, strPDCResult.size()), 0, strPDCResult.size());
                strPDCResult.read();

                if (strPDCResult.byMode == 0) {
                    strPDCResult.uStatModeParam.setType(HCNetSDK.NET_DVR_STATFRAME.class);
                    sAlarmType = sAlarmType + ":客流量统计,进入人数:" + strPDCResult.dwEnterNum + ",离开人数:" + strPDCResult.dwLeaveNum +
                            ", byMode:" + strPDCResult.byMode + ", dwRelativeTime:" + strPDCResult.uStatModeParam.struStatFrame.dwRelativeTime +
                            ", dwAbsTime:" + strPDCResult.uStatModeParam.struStatFrame.dwAbsTime;
                }
                if (strPDCResult.byMode == 1) {
                    strPDCResult.uStatModeParam.setType(HCNetSDK.NET_DVR_STATTIME.class);
                    //在这里实现数据的保存等业务逻辑,下面注释的代码是SDK提供的参考示例

/*                    String strtmStart = "" + String.format("%04d", strPDCResult.uStatModeParam.struStatTime.tmStart.dwYear) +
                            String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmStart.dwMonth) +
                            String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmStart.dwDay) +
                            String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmStart.dwHour) +
                            String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmStart.dwMinute) +
                            String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmStart.dwSecond);
                    String strtmEnd = "" + String.format("%04d", strPDCResult.uStatModeParam.struStatTime.tmEnd.dwYear) +
                            String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmEnd.dwMonth) +
                            String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmEnd.dwDay) +
                            String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmEnd.dwHour) +
                            String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmEnd.dwMinute) +
                            String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmEnd.dwSecond);
                    sAlarmType = sAlarmType + ":客流量统计,进入人数:" + strPDCResult.dwEnterNum + ",离开人数:" + strPDCResult.dwLeaveNum +
                            ", byMode:" + strPDCResult.byMode + ", tmStart:" + strtmStart + ",tmEnd :" + strtmEnd;*/
                }
                System.out.println("sAlarmType---》" +sAlarmType);
                //报警类型
                //报警设备IP地址
                sIP = new String(strPDCResult.struDevInfo.struDevIP.sIpV4).split("\0", 2);
                    return true;
            } catch (Exception ex) {
                Logger.getLogger(MemberFlowUPloadCallBackImpl.class.getName()).log(Level.SEVERE, null, ex);
                return false;
            }
    }
}

 其他问题解决

  1. 项目开发没有问题,最后用maven打包项目时,HCNetSDK的加载出了问题,分析错误日志,发现是因为maven打包时进行了test,无法找到HCNetSDK,只要打包时不test就可以了;
  2. windows server 2008 在jdk1.8.0_131下可以加载到HCNetSDK.dll(这里JDK默认在C:\Program Files );  在更新的JDK版本中就不行(这里JDK默认在C:\Program Files (x86))

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