private void btnJpegCapture_Click(object sender, EventArgs e)
{
m_bJpegCapture = true;
IntPtr ptrJpeg = new IntPtr();
uint nBuffersize = 2 * 1024 * 1024;
ptrJpeg = Marshal.AllocHGlobal((int)nBuffersize);
uint dwJpegSize = 0;
if (PlayCtrl.PlayM4_GetJPEG(m_lPort, ptrJpeg, nBuffersize, ref dwJpegSize))
{
DebugInfo("PlayM4_GetJPEG succ");
}
else
{
uint dwErrorNo = PlayCtrl.PlayM4_GetLastError(m_lPort);
DebugInfo("PlayM4_GetJPEG fail");
}
FileStream fs = new FileStream("C:/GetJpegSave.jpg", FileMode.Create);
byte[] by = new byte[dwJpegSize];
Marshal.Copy(ptrJpeg, by, 0, (int)dwJpegSize);
fs.Write(by, 0, (int)dwJpegSize);
fs.Close();
Marshal.FreeHGlobal(ptrJpeg);
//public static extern bool PlayM4_GetJPEG(int nPort, ref byte pJpeg, uint nBufSize, ref uint pJpegSize);
}