/// <summary>
/// 抓取摘要图片数据
/// </summary>
/// <param name="sessionId"></param>
/// <returns></returns>
public System.Drawing.Image GrabBriefPictureData(Int32 sessionId)
{
MyLog4Net.ILogExtension.DebugWithDebugView(MyLog4Net.Container.Instance.Log, string.Format("IVXSDKProtocol GrabBriefPictureData vodHandle:{0}"
, sessionId
));
uint pictype = (uint)E_VDA_GRAB_PIC_TYPE.E_GRAB_PIC_BMP;
uint buflen = 10 * 1024 * 1024;
IntPtr picbuf = Marshal.AllocHGlobal((int)buflen);
uint picdatalen = 0;
bool retVal = IVXSDKProtocol.VdaSdk_GrabBriefPictureData(sessionId, pictype, picbuf, buflen, out picdatalen);
if (!retVal)
{
// 调用失败，抛异常
CheckError();
}
System.Drawing.Image img = ModelParser.GetImage(picbuf, (int)picdatalen);
MyLog4Net.ILogExtension.DebugWithDebugView(MyLog4Net.Container.Instance.Log, string.Format("IVXSDKProtocol GrabBriefPictureData ret:{0},picdatalen:{1}"
, retVal
, picdatalen
));
if (picbuf != IntPtr.Zero)
{
Marshal.FreeHGlobal(picbuf);
}
return(img);
}
