/// <summary>
/// 关闭视频设备
/// </summary>
public void CloseWebcam()
{
try
{
VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_DRIVER_DISCONNECT, 0, 0);
}
catch (Exception e)
{
mErrorMsg = "关闭摄像头出错,原因:" + e.Message;
throw new Exception(mErrorMsg);
}
}
/// <summary>
/// 拍照
/// </summary>
/// <param name="path">要保存jpeg文件的路径</param>
public void GrabImage(IntPtr hWndC, string path)
{
try
{
IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SAVEDIB, 0, hBmp.ToInt32());
}
catch (Exception e)
{
mErrorMsg = "抓取图像" + path + "失败+原因:" + e.Message;
throw new Exception(mErrorMsg);
}
}
/// <summary>
/// 打开视频设备
/// </summary>
public void StartWebCam()
{
byte[] lpszName = new byte[100];
byte[] lpszVer = new byte[100];
try
{
VideoAPI.capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 100);
this.lwndC = VideoAPI.capCreateCaptureWindowA(lpszName, VideoAPI.WS_CHILD | VideoAPI.WS_VISIBLE, 0, 0, mWidth, mHeight, mControlPtr, 0);
if (VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0))
{
VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SET_PREVIEWRATE, 100, 0);
VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SET_PREVIEW, true, 0);
}
else
{
mErrorMsg = "连接摄像头失败[1]请检查USB是否正确安装.[2]是否正确安装驱动";
}
}
catch (Exception e)
{
mErrorMsg = "打开摄像头出错,原因:" + e.Message;
throw new Exception(mErrorMsg);
}
}
