大华sdk java 大华sdk怎么用

文章目录

• 1、下载大华SDK
• 2、引入NetSDKCS工程
• 3、编写调用SDK的逻辑处理类
• 4、程序启动时初始化SDK调用
• 5、定时任务中调用截图方法
• 6、遇到的问题
• 7、DEMO实例下载

1、下载大华SDK

可以到大华官方网站的“下载中心”下载最新的SDK，地址是：https://www.dahuatech.com/service/downloadlists/836.html

2、引入NetSDKCS工程

（1）将SDK中的NetSDKCS项目拷贝到VideoMonitorPlatform解决方案下

（2）在VS中选中解决方案，点击右键，选择“添加”-“现有项目”，选择刚拷贝过来的NetSDKCS项目

（3）在VideoMonitorPlatform项目的“引用”上点击右键，选择“添加引用”

在弹出的画面中在“解决方案”中选择新加入的NetSDKCS

至此，在VideoMonitorPlatform项目中使用“use NetSDKCS”即可引入SDK

（4）将SDK中的“库文件”文件夹下的文件拷贝到项目的“bin”目录下，在运行程序的时候调用

3、编写调用SDK的逻辑处理类

SDK中提供哪些接口可以参考说明文档，具体代码编写可参考官方DEMO，这里只介绍登录和截图，具体的逻辑类如下：

using System;
using NetSDKCS;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;

namespace VideoMonitorPlatform.Services
{
    public class NvrService
    {

        static log4net.ILog logger = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        #region Field 字段
        public static IntPtr m_LoginID;
        private static fDisConnectCallBack m_DisConnectCallBack;
        private static fHaveReConnectCallBack m_ReConnectCallBack;
        private static fRealDataCallBackEx2 m_RealDataCallBackEx2;
        private static fSnapRevCallBack m_SnapRevCallBack;
        
        private bool m_IsInSave = false;
        #endregion

        public static void Init()
        {

            m_DisConnectCallBack = new fDisConnectCallBack(DisConnectCallBack);
            m_ReConnectCallBack = new fHaveReConnectCallBack(ReConnectCallBack);
            m_RealDataCallBackEx2 = new fRealDataCallBackEx2(RealDataCallBackEx);
            m_SnapRevCallBack = new fSnapRevCallBack(SnapRevCallBack);
            try
            {
                NETClient.Init(m_DisConnectCallBack, IntPtr.Zero, null);
                NETClient.SetAutoReconnect(m_ReConnectCallBack, IntPtr.Zero);
                NETClient.SetSnapRevCallBack(m_SnapRevCallBack, IntPtr.Zero);
                logger.Info("初始化摄像头连接成功");
            }
            catch (Exception ex)
            {
                logger.Error("初始化摄像头连接失败", ex);
            }

            var customerConfig = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~")
                .GetSection("CustomerConfig") as VideoMonitorPlatform.Models.Config.CustomerConfig;
            string nvrIp = customerConfig.NvrIp; // NVR的IP
            string nvrPort = customerConfig.NvrPort; // NVR的端口号
            string nvrUserName = customerConfig.NvrUserName; // NVR的登录用户名
            string nvrPassword = customerConfig.NvrPassword; // NVR的登录密码

            ushort port = 0;
            try
            {
                port = Convert.ToUInt16(nvrPort);
            }
            catch (Exception ex)
            {
                logger.Error("输入端口错误", ex);
            }
            NET_DEVICEINFO_Ex m_DeviceInfo = new NET_DEVICEINFO_Ex();
            NvrService.m_LoginID = NETClient.Login(nvrIp, port, nvrUserName, nvrPassword, EM_LOGIN_SPAC_CAP_TYPE.TCP, IntPtr.Zero, ref m_DeviceInfo);

        }

        public static IntPtr RealPlayCapture(uint channel, uint quality, uint imageSize)
        {
            NET_SNAP_PARAMS asyncSnap = new NET_SNAP_PARAMS();
            asyncSnap.Channel = channel;
            asyncSnap.Quality = quality;
            asyncSnap.ImageSize = 2;
            asyncSnap.mode = 0;
            asyncSnap.InterSnap = 0;
            asyncSnap.CmdSerial = channel;
            bool ret = NETClient.SnapPictureEx(NvrService.m_LoginID, asyncSnap, IntPtr.Zero);
            if (!ret)
            {
                return new IntPtr(1);
            }

            return IntPtr.Zero;
        }

        protected void OnClosed()
        {
            NETClient.Cleanup();
        }

        #region CallBack 回调
        private static void DisConnectCallBack(IntPtr lLoginID, IntPtr pchDVRIP, int nDVRPort, IntPtr dwUser)
        {
        }
        private static void ReConnectCallBack(IntPtr lLoginID, IntPtr pchDVRIP, int nDVRPort, IntPtr dwUser)
        {
        }
        private static void RealDataCallBackEx(IntPtr lRealHandle, uint dwDataType, IntPtr pBuffer, uint dwBufSize, IntPtr param, IntPtr dwUser)
        {
        }
        private static void SnapRevCallBack(IntPtr lLoginID, IntPtr pBuf, uint RevLen, uint EncodeType, uint CmdSerial, IntPtr dwUser)
        {
            var customerConfig = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~")
                .GetSection("CustomerConfig") as VideoMonitorPlatform.Models.Config.CustomerConfig;
            string captureSavePath = customerConfig.CaptureSavePath;
            string path = captureSavePath + "\\" + CmdSerial.ToString();
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
            if (EncodeType == 10) //.jpg
            {
                DateTime now = DateTime.Now;
                string fileName = now.ToString("yyyyMMddHHmmss") + ".jpg";
                string filePath = path + "\\" + fileName;
                byte[] data = new byte[RevLen];
                Marshal.Copy(pBuf, data, 0, (int)RevLen);
                using (FileStream stream = new FileStream(filePath, FileMode.OpenOrCreate))
                {
                    stream.Write(data, 0, (int)RevLen);
                    stream.Flush();
                    stream.Dispose();
                }
            }
        }
        #endregion
    }
}

4、程序启动时初始化SDK调用

在“Global.asax”的“Application_Start()”方法中，初始化SDK调用，代码如下：

// 初始化NVR的SDK
            NvrService.Init();

5、定时任务中调用截图方法

在定时任务处理类“CaptureJob”中调用SDK的方法进行截图，具体如下：

using System;
using Quartz;
using System.Threading.Tasks;
using System.Reflection;
using VideoMonitorPlatform.Services;

namespace VideoMonitorPlatform.Utils
{
    public class CaptureJob : IJob
    {
        #region IJob 成员
        private static log4net.ILog log = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
        
        public async Task Execute(IJobExecutionContext context)
        {
            //log.Info("任务运行");
            DateTime now = DateTime.Now;
            System.Diagnostics.Debug.WriteLine("*********************JOB【" + context.JobDetail.Key + "】执行开始*********************");
            System.Diagnostics.Debug.WriteLine("执行时间：" + now.ToString("yyyy-MM-dd HH:mm:ss"));
            object channelObject = context.JobDetail.JobDataMap.Get("channel");
            object quailityObject = context.JobDetail.JobDataMap.Get("quaility");
            object imageSizeObject = context.JobDetail.JobDataMap.Get("imageSize");
            uint channel = uint.Parse(channelObject.ToString());
            uint quaility = uint.Parse(quailityObject.ToString());
            uint imageSize = uint.Parse(imageSizeObject.ToString());
            NvrService.RealPlayCapture(channel, quaility, imageSize);
            System.Diagnostics.Debug.WriteLine("*********************JOB【" + context.JobDetail.Key + "】执行结束*********************");
        }
        #endregion
    }
}

6、遇到的问题

我在编码时只遇到一个问题，困扰了我很久，我连的设备是硬盘录像机，只在第一个channel连接了一个摄像头，这个channel起始是0，在调用截图的API时，传递了个“1”过去，结果执行和返回结果都成功，但是回调函数就是不调用，怎么调试都不好使，在此感谢大华SDK支持[e-mail]帮我解决了问题。

7、DEMO实例下载

下载地址