/// <summary>
/// 实时视频回调
/// </summary>
/// <param name="pFirstParameter"></param>
/// <param name="wVideoID"></param>
/// <param name="wSize"></param>
/// <param name="pbImage"></param>
/// <returns></returns>
private static unsafe long onVideoCallBack(IntPtr pFirstParameter, UInt16 wVideoID, UInt16 wSize, byte *pbImage)
{
HvResult hvresult = Marshal.GetObjectForIUnknown(pFirstParameter) as HvResult;
if (null == hvresult)
{
return(-1);
}
int iSize = wSize;
if (iSize < 1)
{
return(-1);
}
if (iSize > hvresult.VideoImage.Length)
{
Array.Resize <byte>(ref hvresult.VideoImage, iSize);
}
//分配图像字节,该句注释再测试节省内存空间
hvresult.VideoImage = new byte[iSize];
Marshal.Copy((IntPtr)pbImage, hvresult.VideoImage, 0, iSize);
hvresult.VideoSize = iSize;
hvresult.dtVideo = DateTime.Now;
return(0);
}
/// <summary>
/// 大图回传
/// </summary>
/// <param name="pFirstParameter">第一个传递参数</param>
/// <param name="dwCarID">车号</param>
/// <param name="wImageWidth">图像尺寸宽度</param>
/// <param name="wImageHigh">图像尺寸高度</param>
/// <param name="bType">图像类别</param>
/// <param name="wSize">数据大小</param>
/// <param name="pbImage">图像数据的指针</param>
/// <param name="wImageID">图像的ID号，表示得到的是哪一张图片</param>
/// <param name="wHighImgFlag">高清图片标志</param>
/// <param name="wPlateWidth">表示该图象中检测到的车牌矩形左上坐标</param>
/// <param name="wPlateHigh">表示该图象中检测到的车牌矩形右下坐标</param>
/// <param name="dwTimeMs">时间</param>
/// <returns></returns>
private unsafe long onBigImgCallBack(IntPtr pFirstParameter, uint dwCarID, ushort wImageWidth, ushort wImageHigh, byte bType, ushort wSize, byte *pbImage,
ushort wImageID, ushort wHighImgFlag, ushort wPlateWidth, ushort wPlateHigh, ulong dwTimeMs)
{
HvResult hvresult = Marshal.GetObjectForIUnknown(pFirstParameter) as HvResult;
if (null == hvresult)
{
return(-1);
}
int iSize = wSize;
if (iSize < 1)
{
return(-1);
}
//wHighImgFlag的值跟FF00按位与操作，如果高8位是FF，&结果不为0，则应是高清图片
////取wHighImgFlag低8位，并左移16位
if ((wHighImgFlag & 0xFF00) != 0)
{
iSize = wSize + (int)((wHighImgFlag & 0x00FF) << 16);
}
hvresult.CarID = dwCarID;
//拷贝图片数据
hvresult.BigImage = new byte[iSize];
Marshal.Copy((IntPtr)pbImage, hvresult.BigImage, 0, iSize);
return(0);
}
/// <summary>
/// 小图回调
/// </summary>
/// <param name="pFirstParameter"></param>
/// <param name="dwCarID"></param>
/// <param name="wImageWidth"></param>
/// <param name="wImageHigh"></param>
/// <param name="bType"></param>
/// <param name="wSize"></param>
/// <param name="pbImage"></param>
/// <param name="dwTimeMs"></param>
/// <returns></returns>
private unsafe long onSmallImgCallBack(IntPtr pFirstParameter, uint dwCarID, ushort wImageWidth, ushort wImageHigh, byte bType,
ushort wSize, byte *pbImage, ulong dwTimeMs)
{
HvResult hvresult = Marshal.GetObjectForIUnknown(pFirstParameter) as HvResult;
if (null == hvresult)
{
return(-1);
}
////设置缓存长度
int iRealLen = 0;
int iBuffLen = (int)wImageWidth * (int)wImageHigh * 3 + 1024;
hvresult.SmallImage = new byte[iBuffLen];
////m_Redult为存储结果流的类
long state = 0;
fixed(byte *pDest = hvresult.SmallImage)
{
state = HVDLLFun.Yuv2BMP(pDest, iBuffLen, ref iRealLen, pbImage, wImageWidth, wImageHigh);
Array.Resize <byte>(ref hvresult.SmallImage, iRealLen);
}
return(0);
}
/// <summary>
/// 获取视频信息
/// </summary>
/// <param name="iVideo">视频通道号</param>
/// <returns></returns>
public HvVideoInfo getVideoInfo(int iVideo)
{
HvVideoInfo info = new HvVideoInfo();
if (IntPtr.Zero == this.m_Hv)
{
return(info);
}
HvResult hvresult = this.resultFirst;
if (0 != iVideo)
{
hvresult = this.resultSecond;
}
info.DtVideo = hvresult.dtVideo;
info.VideoSize = hvresult.VideoSize;
info.VideoImage = hvresult.VideoImage;
return(info);
}
/// <summary>
/// 重置识别器结果信息
/// <param name="iVideo">视频通道号</param>
/// </summary>
public void ResetInfo(int iVideo)
{
if (IntPtr.Zero == this.m_Hv)
{
return;
}
HvResult hvresult = this.resultFirst;
if (0 != iVideo)
{
hvresult = this.resultSecond;
}
hvresult.info = "";
hvresult.strcolor = "";
hvresult.strplateno = "";
hvresult.strTime = "";
hvresult.BigImage = new byte[0];
hvresult.SmallImage = new byte[0];
}
/// <summary>
/// 获取视频通道当前识别信息
/// </summary>
/// <param name="iVideo">视频通道号(0,1)</param>
/// <returns></returns>
public HvCarPlateInfo getCarPlateInfo(int iVideo)
{
HvCarPlateInfo info = new HvCarPlateInfo();
if (IntPtr.Zero == this.m_Hv)
{
return(info);
}
HvResult hvresult = this.resultFirst;
if (0 != iVideo)
{
hvresult = this.resultSecond;
}
info.CarNum = hvresult.strplateno;
info.BigImage = hvresult.BigImage;
info.SmallImage = hvresult.SmallImage;
return(info);
}
/// <summary>
/// 车牌号回调
/// </summary>
/// <param name="pFirstParameter">第一个传递参数</param>
/// <param name="dwCarID">车号</param>
/// <param name="pcPlateNo">车牌号</param>
/// <param name="dwTimeMs">时间</param>
/// <returns></returns>
private long onPlateNoCallBack(IntPtr pFirstParameter, uint dwCarID, string pcPlateNo, ulong dwTimeMs)
{
HvResult hvresult = Marshal.GetObjectForIUnknown(pFirstParameter) as HvResult;
if (null == hvresult)
{
return(-1);
}
string strplateno, strcolor;
int length = pcPlateNo.Length;
strcolor = pcPlateNo.Substring(0, 1);
strplateno = pcPlateNo.Substring(1, length - 1);
//时间的转化
long time_C_Long = (long)dwTimeMs; //C++长整型日期，毫秒为单位
DateTime dt_1970 = new DateTime(1970, 1, 1, 0, 0, 0, 0);
long tricks_1970 = dt_1970.Ticks; //1970年1月1日刻度
long time_tricks = tricks_1970 + time_C_Long * 10000; //日志日期刻度
DateTime dt = new DateTime(time_tricks); //转化为DateTime(世界时间)
DateTime dt2 = dt.ToLocalTime(); //将世界时间转化为当前时间（本时区的时间）
hvresult.strTime = string.Format("{0:yyyy-MM-dd HH:mm:ss}", dt2);
byte[] plateinfo = new byte[256];
unsafe
{
byte *pszInfo = null;
HVDLLFun.HV_GetPlateInfo(hvresult.m_Hv, &pszInfo); //提取附加的信息
Marshal.Copy((IntPtr)pszInfo, plateinfo, 0, 256);
}
hvresult.CarID = dwCarID;
hvresult.info = Encoding.Default.GetString(plateinfo);
hvresult.strcolor = strcolor;
hvresult.strplateno = strplateno;
return(0);
}
/// <summary>
/// 读取视频图像流
/// </summary>
/// <param name="iVideo">视频通道号(0,1)</param>
/// <returns></returns>
public MemoryStream getStreamVideo(int iVideo)
{
if (IntPtr.Zero == this.m_Hv)
{
return(null);
}
HvResult hvresult = this.resultFirst;
if (0 != iVideo)
{
hvresult = this.resultSecond;
}
if (hvresult.VideoSize < 1 || hvresult.VideoImage.Length < 1)
{
return(null);
}
try
{
hvresult.streamVideo.SetLength(hvresult.VideoSize);
hvresult.streamVideo.Seek(0, SeekOrigin.Begin);
hvresult.streamVideo.Write(hvresult.VideoImage, 0, hvresult.VideoSize);
}catch { }
return(hvresult.streamVideo);
}
