NET_DVR_SetRealDataCallBack

#include <stdio.h>
#include <iostream>
#include <time.h>
#include "plaympeg4.h"
using namespace std;

LONG lPort; //全局的播放库port号

void CALLBACK g_RealDataCallBack_V30(LONG lRealHandle, DWORD dwDataType, BYTE *pBuffer,DWORD dwBufSize,DWORD dwUser)
{
    HWND hWnd = GetConsoleWindow();

	switch (dwDataType)
	{
	case NET_DVR_SYSHEAD: //系统头

		if (!PlayM4_GetPort(&lPort))  //获取播放库未使用的通道号
		{
			break;
		}
		//m_iPort = lPort; //第一次回调的是系统头，将获取的播放库port号赋值给全局port，下次回调数据时即使用此port号播放
		if (dwBufSize > 0)
		{
			if (!PlayM4_SetStreamOpenMode(lPort, STREAME_REALTIME))  //设置实时流播放模式
			{
				break;
			}

			if (!PlayM4_OpenStream(lPort, pBuffer, dwBufSize, 1024*1024)) //打开流接口
			{
				break;
			}

			if (!PlayM4_Play(lPort, hWnd)) //播放开始
			{
				break;
			}
		}
	case NET_DVR_STREAMDATA:   //码流数据
		if (dwBufSize > 0 && lPort != -1)
		{
			if (!PlayM4_InputData(lPort, pBuffer, dwBufSize))
			{
				break;
			} 
		}
	}
}

void CALLBACK g_ExceptionCallBack(DWORD dwType, LONG lUserID, LONG lHandle, void *pUser)
{
    char tempbuf[256] = {0};
    switch(dwType) 
    {
    case EXCEPTION_RECONNECT:    //预览时重连
    printf("----------reconnect--------%d\n", time(NULL));
    break;
	default:
    break;
    }
}

void main() {

  //---------------------------------------
  // 初始化
  NET_DVR_Init();
  
  //---------------------------------------
  // 注册设备
  LONG lUserID;
  NET_DVR_DEVICEINFO_V30 struDeviceInfo;
  lUserID = NET_DVR_Login_V30("172.0.0.100", 8000, "admin", "12345", &struDeviceInfo);
  if (lUserID < 0)
  {
       printf("Login error, %d\n", NET_DVR_GetLastError());
       NET_DVR_Cleanup();
       return;
  }

  //---------------------------------------
  //设置异常消息回调函数
  NET_DVR_SetExceptionCallBack_V30(0, NULL,g_ExceptionCallBack, NULL);

  //---------------------------------------
  //启动预览并设置回调数据流
  LONG lRealPlayHandle;
  NET_DVR_CLIENTINFO ClientInfo = {0};
  ClientInfo.hPlayWnd = NULL;         //需要SDK解码时句柄设为有效值，仅取流不解码时可设为空
  ClientInfo.lChannel     = 1;       //预览通道号
  ClientInfo.lLinkMode    = 0;       //最高位(31)为0表示主码流，为1表示子码流0～30位表示连接方式：0－TCP方式；1－UDP方式；2－多播方式；3－RTP方式;
  ClientInfo.sMultiCastIP = NULL;   //多播地址，需要多播预览时配置
  
  BOOL bPreviewBlock = false;       //请求码流过程是否阻塞，0：否，1：是
  lRealPlayHandle = NET_DVR_RealPlay_V30(lUserID, &ClientInfo, NULL, NULL, 0);

  if (lRealPlayHandle < 0)
  {
      printf("NET_DVR_RealPlay_V30 error\n");
	  NET_DVR_Logout(lUserID);
      NET_DVR_Cleanup();
      return;
  }

  if (!NET_DVR_SetRealDataCallBack(lRealPlayHandle, g_RealDataCallBack_V30, 0))
  {
      printf("NET_DVR_SetRealDataCallBack error\n");
  }
  
  //---------------------------------------
  //关闭预览
  NET_DVR_StopRealPlay(lRealPlayHandle);
  //注销用户
  NET_DVR_Logout_V30(lUserID);
  NET_DVR_Cleanup();

  return;
}