/// <summary>
/// 检查是否有视频设备
/// </summary>
/// <returns></returns>
public bool CheckWebcamExist()
{
byte[] lpszName = new byte[100];
byte[] lpszVer = new byte[100];
VideoAPI.capGetDriverDescription(0, lpszName, 100, lpszVer, 100);
caphwnd = VideoAPI.capCreateCaptureWindow(lpszName, VideoAPI.WS_CHILD | VideoAPI.WS_VISIBLE, 0, 0, this.width, this.height, this.controlhwnd, 1);
if (caphwnd == null)
{
return(false);
}
int index = 0;
bool isconnect = VideoAPI.SendMessage(caphwnd, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0);
while (!isconnect)
{
isconnect = VideoAPI.SendMessage(caphwnd, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0);
if (++index <= 10)
{
continue;
}
}
if (isconnect == false)
{
VideoAPI.CloseHandle(caphwnd);
return(false);
}
else
{
VideoAPI.SendMessage(caphwnd, VideoAPI.WM_CAP_DRIVER_DISCONNECT, 0, 0);
return(true);
}
}
/// <summary>
/// 启动视频设备
/// </summary>
/// <returns></returns>
public bool StartWebcam()
{
byte[] lpszName = new byte[100];
byte[] lpszVer = new byte[100];
VideoAPI.capGetDriverDescription(0, lpszName, 100, lpszVer, 100);
caphwnd = VideoAPI.capCreateCaptureWindow(lpszName, VideoAPI.WS_CHILD | VideoAPI.WS_VISIBLE, 0, 0, this.width, this.height, this.controlhwnd, 1);
if (caphwnd == null)
{
return(false);
}
//解决在Win7系统下摄像头获取不到问题
int index = 0;
bool isconnect = VideoAPI.SendMessage(caphwnd, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0);
while (!isconnect)
{
isconnect = VideoAPI.SendMessage(caphwnd, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0);
if (++index <= 10)
{
continue;
}
}
if (isconnect == false)
{
VideoAPI.CloseHandle(caphwnd);
return(false);
}
if (VideoAPI.SendMessage(caphwnd, VideoAPI.WM_CAP_SET_PREVIEWRATE, 66, 0) == false)
{
return(false);
}
if (VideoAPI.SendMessage(caphwnd, VideoAPI.WM_CAP_SET_PREVIEW, true, 0) == false)
{
return(false);
}
if (VideoAPI.SendMessage(caphwnd, VideoAPI.WM_CAP_SET_SCALE, 1, 0) == false)
{
return(false);
}
isstart = true;
return(true);
}
