Unity海康视屏对接

通过对接海康SDK，获取视屏流回调。经过解码得到YUV格式的图片，最后通过Shader把YUV数据显示出来。

也可以通过Rtsp协议，直接获取视屏流显示。这个貌似Unity中已经有插件支持了,UMP。

------2018.4.20

using UnityEngine;
using System.Collections;
using System;
using UnityEngine.UI;
using System.Threading;
using System.Runtime.InteropServices;
using System.IO;
using System.Drawing;
using System.Collections.Generic;
//Frame Info
public struct FRAME_INFO
{
    public int nWidth;
    public int nHeight;
    public int nStamp;
    public int nType;
    public int nFrameRate;
    public uint dwFrameNum;

    public void Init()
    {
        nWidth = 0;
        nHeight = 0;
        nStamp = 0;
        nType = 0;
        nFrameRate = 0;
        dwFrameNum = 0;
    }
}
public class HkVideo : MonoBehaviour {
    // add by gb 080131 version 4.9.0.1
    [DllImport("PlayCtrl")]
    public static extern bool PlayM4_GetPort(ref int nPort);
    [DllImport("PlayCtrl")]
    public static extern uint PlayM4_GetLastError(int nPort);
    [DllImport("PlayCtrl")]
    public static extern bool PlayM4_SetStreamOpenMode(int nPort, uint nMode);
    //Stream type
    public const int STREAME_REALTIME = 0;
    public const int STREAME_FILE = 1;
    [DllImport("PlayCtrl")]
    public static extern bool PlayM4_OpenStream(int nPort, IntPtr pFileHeadBuf, uint nSize, uint nBufPoolSize);
    [DllImport("PlayCtrl")]
    public static extern bool PlayM4_SetDisplayBuf(int nPort, uint nNum);
    [DllImport("PlayCtrl")]
    public static extern bool PlayM4_SetOverlayMode(int nPort, int bOverlay, uint colorKey);
    public delegate void DECCBFUN(int nPort, IntPtr pBuf, int nSize, ref FRAME_INFO pFrameInfo, int nReserved1, int nReserved2);   
    [DllImport("PlayCtrl")]
    public static extern bool PlayM4_SetDecCallBackEx(int nPort, DECCBFUN DecCBFun, IntPtr pDest, int nDestSize);
    [DllImport("PlayCtrl")]
    public static extern bool PlayM4_Play(int nPort, IntPtr hWnd);
    [DllImport("PlayCtrl")]
    public static extern bool PlayM4_InputData(int nPort, IntPtr pBuf, uint nSize);
    [DllImport("PlayCtrl")]
    public static extern bool PlayM4_SetDecCallBack(int nPort, DECCBFUN DecCBFun);
    [DllImport("PlayCtrl")]
    public static extern bool PlayM4_Stop(int nPort);
    [DllImport("PlayCtrl")]
    public static extern bool PlayM4_CloseStream(int nPort);
    [DllImport("PlayCtrl")]
    public static extern bool PlayM4_FreePort(int nPort);

    private bool m_bInitSDK = false;
    private bool m_bRecord = false;
    private uint iLastErr = 0;
    public Int32 m_lUserID = -1;
    private Int32 m_lRealHandle = -1;
    private string str;
    private Int32 m_lPort = -1;
    private IntPtr m_ptrRealHandle;
    private int[] iIPDevID = new int[96];
    private int[] iChannelNum = new int[96];

    private CHCNetSDK.REALDATACALLBACK RealData = null;
    public CHCNetSDK.NET_DVR_DEVICEINFO_V30 DeviceInfo;
    public CHCNetSDK.NET_DVR_IPPARACFG_V40 m_struIpParaCfgV40;
    public CHCNetSDK.NET_DVR_STREAM_MODE m_struStreamMode;
    public CHCNetSDK.NET_DVR_IPCHANINFO m_struChanInfo;
    public CHCNetSDK.NET_DVR_IPCHANINFO_V40 m_struChanInfoV40;
    private DECCBFUN m_fDisplayFun = null;
    public delegate void MyDebugInfo(string str);

    int width = 352;//视屏的宽
    int height = 288;//视屏的高
    public bool isPlaying;
    // Use this for initialization
    void Start () {
        InitSDK();
        //InitVideoMaterial();
    }
    private bool isImgInit;
    ///// <summary>
    ///// 初始化RGB图像大小
    ///// </summary>
    //private void InitImgSize()
    //{
    //    imgSize = width * height;
    //    rgb = new byte[3 * imgSize];
    //}
    /// <summary>
    /// 初始化，一次就行（初始化->登录->获取视屏流）
    /// </summary>
    private void InitSDK()
    {
        m_bInitSDK = CHCNetSDK.NET_DVR_Init();
        if (m_bInitSDK == false)
        {
            Debug.LogError("NET_DVR_Init error!");
            return;
        }
        else
        {
            //保存SDK日志 To save the SDK log
            CHCNetSDK.NET_DVR_SetLogToFile(3, "C:\\SdkLog\\", true);

            //comboBoxView.SelectedIndex = 0;

            for (int i = 0; i < 64; i++)
            {
                iIPDevID[i] = -1;
                iChannelNum[i] = -1;
            }
            Debug.Log("Init Success!");
        }
    }
    /// <summary>
    /// 登录（初始化->登录->获取视屏流）
    /// </summary>
    /// <param name="Ip"></param>
    /// <param name="Port"></param>
    /// <param name="UserName"></param>
    /// <param name="PassWord"></param>
    /// <param name="action"></param>
    public void Login(string Ip,string Port,string UserName,string PassWord,Action<bool>action=null)
    {       
        if (m_lUserID < 0)
        {
            //JYHLoginVR JYHCamera = JYHLoginVR.Instance;
            //string DVRIPAddress = Ip; //设备IP地址或者域名 Device IP
            //Int16 DVRPortNumber = Int16.Parse(Port);//设备服务端口号 Device Port
            //string DVRUserName = UserName;//设备登录用户名 User name to login
            //string DVRPassword = PassWord;//设备登录密码 Password to login
            string DVRIPAddress = Ip; //设备IP地址或者域名 Device IP
            Int16 DVRPortNumber = Int16.Parse(Port);//设备服务端口号 Device Port
            string DVRUserName = UserName;//设备登录用户名 User name to login
            string DVRPassword = PassWord;//设备登录密码 Password to login                    
            //Debug.LogError("CameraInfo:"+Ip+" "+Port+" "+UserName+" "+PassWord+"\n"+DateTime.Now);
            //登录设备 Login the device
            m_lUserID = CHCNetSDK.NET_DVR_Login_V30(DVRIPAddress, DVRPortNumber, DVRUserName, DVRPassword, ref DeviceInfo);
            if (m_lUserID < 0)
            {
                iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                str = "NET_DVR_Login_V30 failed : \n"+iLastErr+"\n"+ GetErroCode(iLastErr); //登录失败，输出错误号 Failed to login and output the error code
                Debug.LogError(str);
                if(action!=null)
                {
                    action(false);
                }
                return;
            }
            else
            {
                //登录成功
                Debug.Log("NET_DVR_Login_V30 succ!");
                if (action != null)
         &