public bool InitCamera()
{
const int MAX_CAMS = 2;
tSdkCameraDevInfo[] sCameraList = null;
int iCameraNums = MAX_CAMS;
tSdkCameraCapbility sCameraInfo = new tSdkCameraCapbility();
CameraSdkStatus status = MvApi.CameraEnumerateDevice(out sCameraList);
if (status != CameraSdkStatus.CAMERA_STATUS_SUCCESS || iCameraNums == 0)
{
return(false);
}
//只假设连接了一个相机。
if ((status = MvApi.CameraInit(ref sCameraList[0], -1, -1, ref m_hCamera)) != CameraSdkStatus.CAMERA_STATUS_SUCCESS)
{
string msg = string.Format("***Failed to init the camera! Error code is {0}", status);
WinCall.TraceMessage(msg);
return(false);
}
//Get properties description for this camera.
MvApi.CameraGetCapability(m_hCamera, out sCameraInfo);
m_ImageBufferSnapshot = Marshal.AllocHGlobal(sCameraInfo.sResolutionRange.iWidthMax * sCameraInfo.sResolutionRange.iHeightMax * 3 + 1024);
return(true);
}
private bool InitCamera()
{
tSdkCameraDevInfo[] tCameraDevInfoList = new tSdkCameraDevInfo[12];
IntPtr ptr;
int i;
#if USE_CALL_BACK
CAMERA_SNAP_PROC pCaptureCallOld = null;
#endif
ptr = Marshal.AllocHGlobal(Marshal.SizeOf(new tSdkCameraDevInfo()) * 12);
int iCameraCounts = 12;//如果有多个相机时，表示最大只获取最多12个相机的信息列表。该变量必须初始化，并且大于1
if (m_hCamera > 0)
{
//已经初始化过，直接返回 true
return(true);
}
if (MvApi.CameraEnumerateDevice(ptr, ref iCameraCounts) == CameraSdkStatus.CAMERA_STATUS_SUCCESS)
{
for (i = 0; i < 12; i++)
{
tCameraDevInfoList[i] = (tSdkCameraDevInfo)Marshal.PtrToStructure((IntPtr)((int)ptr + i * Marshal.SizeOf(new tSdkCameraDevInfo())), typeof(tSdkCameraDevInfo));
}
Marshal.FreeHGlobal(ptr);
if (iCameraCounts >= 1)//此时iCameraCounts返回了实际连接的相机个数。如果大于1，则初始化第一个相机
{
if (MvApi.CameraInit(ref tCameraDevInfoList[0], -1, -1, ref m_hCamera) == CameraSdkStatus.CAMERA_STATUS_SUCCESS)
{
//获得相机特性描述
ptr = Marshal.AllocHGlobal(Marshal.SizeOf(new tSdkCameraCapbility()));
MvApi.CameraGetCapability(m_hCamera, ptr);
tCameraCapability = (tSdkCameraCapbility)Marshal.PtrToStructure(ptr, typeof(tSdkCameraCapbility));
Marshal.FreeHGlobal(ptr);
Marshal.FreeHGlobal(m_ImageBuffer);
m_ImageBuffer = Marshal.AllocHGlobal(tCameraCapability.sResolutionRange.iWidthMax * tCameraCapability.sResolutionRange.iHeightMax * 3 + 1024);
m_ImageBufferSnapshot = Marshal.AllocHGlobal(tCameraCapability.sResolutionRange.iWidthMax * tCameraCapability.sResolutionRange.iHeightMax * 3 + 1024);
//初始化显示模块，使用SDK内部封装好的显示接口
MvApi.CameraDisplayInit(m_hCamera, pic_Image.Handle);
MvApi.CameraSetDisplaySize(m_hCamera, pic_Image.Width, pic_Image.Height);
//设置抓拍通道的分辨率。
tSdkImageResolution tResolution;
tResolution.fZoomScale = 1.0F;
tResolution.iVOffset = 0;
tResolution.iHOffset = 0;
tResolution.uBinMode = 0;
tResolution.uSkipMode = 0;
tResolution.iWidth = tCameraCapability.sResolutionRange.iWidthMax;
tResolution.iHeight = tCameraCapability.sResolutionRange.iHeightMax;
//tResolution.iIndex = 0xff;表示自定义分辨率,如果tResolution.iWidth和tResolution.iHeight
//定义为0，则表示跟随预览通道的分辨率进行抓拍。抓拍通道的分辨率可以动态更改。
//本例中将抓拍分辨率固定为最大分辨率。
tResolution.iIndex = 0xff;
tResolution.acDescription = new byte[32];//描述信息可以不设置
MvApi.CameraSetResolutionForSnap(m_hCamera, ref tResolution);
//让SDK来根据相机的型号动态创建该相机的配置窗口。
MvApi.CameraCreateSettingPage(m_hCamera, this.Handle, tCameraDevInfoList[0].acFriendlyName, /*SettingPageMsgCalBack*/ null, /*m_iSettingPageMsgCallbackCtx*/ (IntPtr)null, 0);
//两种方式来获得预览图像，设置回调函数或者使用定时器或者独立线程的方式，
//主动调用CameraGetImageBuffer接口来抓图。
//本例中仅演示了两种的方式,注意，两种方式也可以同时使用，但是在回调函数中，
//不要使用CameraGetImageBuffer，否则会造成死锁现象。
#if USE_CALL_BACK
MvApi.CameraSetCallbackFunction(m_hCamera, ImageCaptureCallback, m_iCaptureCallbackCtx, ref pCaptureCallOld);
#else //如果需要采用多线程，使用下面的方式
m_bExitCaptureThread = false;
m_tCaptureThread = new Thread(new ThreadStart(CaptureThreadProc));
m_tCaptureThread.Start();
#endif
return(true);
}
else
{
m_hCamera = 0;
//StateLabel.Text = "相机初始化失败";
return(false);
}
}
}
return(false);
}
