myvtm/Module/mod_PortableScanner/DocScannerCap.cpp

#include "stdafx.h"
#include "DocScannerCap.h"
#include "math.h"
#include "UserEventCode.h"
//template<typename T>
//struct  identity
//{
//	typedef T type;
//};
//#define X(F, T) identity<T>::type& F = *reinterpret_cast<identity<T>::type*>( \
//	GetProcAddress(GetModuleHandle("user32.dll"), #F))
//X(RegisterDeviceNotification, HDEVNOTIFY WINAPI(
//	IN HANDLE hRecipient,IN LPVOID NotificationFilter,IN DWORD Flags));
//X(UnregisterDeviceNotification, BOOL(WINAPI *PUnregisterDeviceNotification)(IN HDEVNOTIFY Handle));
//#undef X


HWND g_hInnerWnd = NULL;
HDEVNOTIFY g_hDevNotify = NULL;
LRESULT CALLBACK CameraNotifierProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);

pFnEventFinished OnEvtFinished = &CDocScannerCap::EvtFinishedHandle;

int GetCameraInfors(CAMERA_BUCKET& vtCameraList)
{
	// enumerate all video capture devices
	DestoryCamereBuckets(vtCameraList);
	ICreateDevEnum *pDevEnum = NULL;
	IEnumMoniker *pEnum = NULL;
	int deviceCounter = 0;
	HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,
		CLSCTX_INPROC_SERVER, IID_ICreateDevEnum,
		reinterpret_cast<void**>(&pDevEnum));

	if (SUCCEEDED(hr)) {

		// Create an enumerator for the video capture category.
		hr = pDevEnum->CreateClassEnumerator(
			CLSID_VideoInputDeviceCategory,
			&pEnum, 0);

		if (hr == S_OK) {

			//if (!silent)printf("SETUP: Looking For Capture Devices\n");
			IMoniker *pMoniker = NULL;
			while (pEnum->Next(1, &pMoniker, NULL) == S_OK) {

				IPropertyBag *pPropBag;
				hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag, (void**)(&pPropBag));
				if (FAILED(hr)) {

					pMoniker->Release();
					continue;  // Skip this one, maybe the next one will work.
				}
				PCAMERA_INFOR_ITEM item = new CAMERA_INFOR_ITEM();
				if(item != NULL) {

					item->Cleanup();
					// Find the description or friendly name.
					VARIANT varName;
					VariantInit(&varName);
					hr = pPropBag->Read(L"Description", &varName, 0);
					if (FAILED(hr)) {

						hr = pPropBag->Read(L"FriendlyName", &varName, 0);
					}

					if (SUCCEEDED(hr)) {

						hr = pPropBag->Read(L"FriendlyName", &varName, 0);
						int maxLen = sizeof(item->szDevName) - 2;
						int nLen = WrapW2A(varName, &(item->szDevName[0]), maxLen);
						VariantClear(&varName);
					}
					VARIANT varCLSID;
					VariantInit(&varCLSID);
					hr = pPropBag->Read(L"CLSID", &varCLSID, 0);
					if (SUCCEEDED(hr)) {
						int maxLen = sizeof(item->szCLSID) - 2;
						int nLen = WrapW2A(varCLSID, &(item->szCLSID[0]), maxLen);
						VariantClear(&varCLSID);
					}
					VARIANT varDevPath;
					VariantInit(&varDevPath);
					hr = pPropBag->Read(L"DevicePath", &varDevPath, 0);
					if (SUCCEEDED(hr)) {
						int maxLen = sizeof(item->szDevPath) - 2;
						int nLen = WrapW2A(varDevPath, &(item->szDevPath[0]), maxLen);
						VariantClear(&varDevPath);
					}
					VARIANT varWaveID;
					VariantInit(&varWaveID);
					hr = pPropBag->Read(L"WaveInID", &varWaveID, 0);
					if (SUCCEEDED(hr)) {
						item->uWaveInID = varWaveID.lVal;
						VariantClear(&varWaveID);
					}
					vtCameraList.push_back(item);
				}
				pPropBag->Release();
				pPropBag = NULL;

				pMoniker->Release();
				pMoniker = NULL;

				deviceCounter++;
			}

			pDevEnum->Release();
			pDevEnum = NULL;

			pEnum->Release();
			pEnum = NULL;
		}
	}
	return deviceCounter;
}

int IsDeviceBusy(const char* lpcszDeviceName)
{
	LOG_FUNCTION();
	int nRet = -2;
	ICreateDevEnum *pDevEnum = NULL;
	HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,
		CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, (void**)&pDevEnum);
	IEnumMoniker *pEnum = NULL;
	hr = pDevEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory, &pEnum, 0);
	if (SUCCEEDED(hr)) {
		// Create an enumerator for the video capture category.
			IMoniker *pMoniker = NULL;
			nRet = -1;
			while (pEnum->Next(1, &pMoniker, NULL) == S_OK) {
				IPropertyBag *pPropBag = NULL;
				hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag, (void**)(&pPropBag));
				if (FAILED(hr)) {
				    SAFE_RELEASE_IDEV(pPropBag);
					SAFE_RELEASE_IDEV(pMoniker);
					continue;  // Skip this one, maybe the next one will work.
				}
				VARIANT varName;
				VariantInit(&varName);
				hr = pPropBag->Read(L"Description", &varName, 0);
				if (FAILED(hr)) {
					hr = pPropBag->Read(L"FriendlyName", &varName, 0);
				}
				if (SUCCEEDED(hr)) {
					hr = pPropBag->Read(L"FriendlyName", &varName, 0);
					int count = 255;
					char tmp[256] = {0};
					WrapW2A(varName, tmp, count);
					if(SUCCEEDED(hr)) {
						if(!strcmp(lpcszDeviceName, tmp)) {
							//Deal the specific device
							nRet = 0;
							LPBC* pbc = NULL;
							IBaseFilter *P_VCamTrans = NULL;
							IBaseFilter *pCap = NULL;
							CreateBindCtx(0, pbc);
							hr = pMoniker->BindToObject((IBindCtx *)pbc, 0, IID_IBaseFilter,(void **)&pCap); 
							    
							IGraphBuilder *m_pGB = NULL;   
							IMediaControl *m_pMC = NULL;   
							IVideoWindow   *m_pVW = NULL;
							IMediaEventEx *m_pME = NULL;
							hr = CoCreateInstance(CLSID_FilterGraph, NULL, 
								CLSCTX_INPROC, IID_IGraphBuilder, (void **)&m_pGB);
							if (FAILED(hr)) {
								nRet = -2;
								SAFE_RELEASE_IDEV(m_pGB);
								SAFE_RELEASE_IDEV(pCap);
								SAFE_RELEASE_IDEV(pPropBag);
								SAFE_RELEASE_IDEV(pMoniker);
								goto PEnd;  
							}
							m_pGB->AddFilter(pCap, NULL);
							ICaptureGraphBuilder2 *m_pCapGB = NULL;
							hr = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL,
								CLSCTX_INPROC_SERVER, IID_ICaptureGraphBuilder2, (void **)&m_pCapGB);  
							if (FAILED(hr)) {
								nRet = -2;
								SAFE_RELEASE_IDEV(m_pCapGB);
								SAFE_RELEASE_IDEV(m_pGB);
								SAFE_RELEASE_IDEV(pCap);
								SAFE_RELEASE_IDEV(pPropBag);
								SAFE_RELEASE_IDEV(pMoniker);
								goto PEnd;  
							}  
							m_pCapGB->SetFiltergraph(m_pGB);
							IAMCrossbar *pXBar1 = NULL;
							hr = m_pCapGB->FindInterface(&LOOK_UPSTREAM_ONLY, NULL, pCap, 
								IID_IAMCrossbar,(void **)&pXBar1);
							if (SUCCEEDED(hr)) {
								long OutputPinCount;
								long InputPinCount;
								long PinIndexRelated;
								long PhysicalType;
								long inPort = 0;
								long outPort = 0;

								pXBar1->get_PinCounts(&OutputPinCount,&InputPinCount);
								int videoBusy = 1;
								for (int i=0; i<InputPinCount; i++) {
									for (int j=0; j<OutputPinCount; j++) {
										if(S_OK == pXBar1->CanRoute(j, i)) {
											pXBar1->Route(j,i);
											m_pGB->AddFilter(pCap, L"Capture Filter");
											hr = m_pGB->QueryInterface(IID_IMediaControl, (void **)&m_pMC);
											hr = m_pGB->QueryInterface(IID_IVideoWindow,(LPVOID*)&m_pVW);
											hr = m_pCapGB->RenderStream(NULL, NULL, pCap, NULL, P_VCamTrans);
											hr = m_pVW->put_Owner((OAHWND)NULL); 
											hr = m_pVW->put_WindowStyle( WS_CHILD | WS_CLIPCHILDREN);
											hr = m_pVW->put_Visible(OAFALSE);   
											hr = m_pVW->put_AutoShow(OAFALSE);
											HRESULT innhr = m_pMC->StopWhenReady();
											if (SUCCEEDED(innhr))
											{
												videoBusy = 0;
											}
											else {
												LogWarn(Severity_Low, Error_DevCommFailed, LOG_ERROR_PORTABLESCANNER_BUSY_ONE,
													CSimpleStringA::Format("%s stop failed: %d", lpcszDeviceName, innhr));
											}
											SAFE_RELEASE_IDEV(m_pVW);
											SAFE_RELEASE_IDEV(m_pMC);
											SAFE_RELEASE_IDEV(P_VCamTrans);
										}
									}
								}
								if (videoBusy == 1)
								{
									nRet = 1; //视频设备占用
								}
								SAFE_RELEASE_IDEV(pXBar1);
							}
							else //pXBar1
							{
								m_pGB->AddFilter(pCap, L"Capture Filter");
								m_pGB->QueryInterface(IID_IMediaControl, (void **)&m_pMC);
								hr = m_pGB->QueryInterface(IID_IMediaEventEx, (void**)&m_pME);
								hr = m_pGB->QueryInterface(IID_IVideoWindow,(LPVOID*)&m_pVW);
								hr = m_pCapGB->RenderStream(NULL, NULL, pCap, NULL, P_VCamTrans);

								hr = m_pVW->put_Owner((OAHWND)NULL); 
								hr = m_pVW->put_WindowStyle( WS_CHILD | WS_CLIPCHILDREN);
								hr = m_pVW->put_Visible(OAFALSE);   
								hr = m_pVW->put_AutoShow(OAFALSE);

								HRESULT innhr = m_pMC->StopWhenReady();
								if (FAILED(innhr))
								{
									LogWarn(Severity_Low, Error_DevCommFailed, LOG_ERROR_PORTABLESCANNER_BUSY_TWO,
										CSimpleStringA::Format("%s stop failed: %d", lpcszDeviceName, innhr));
									nRet = 1;  //视频设备占用
								}
								SAFE_RELEASE_IDEV(m_pVW);
								SAFE_RELEASE_IDEV(m_pMC);
                                SAFE_RELEASE_IDEV(P_VCamTrans);
							}
							SAFE_RELEASE_IDEV(m_pCapGB);
							SAFE_RELEASE_IDEV(m_pGB);
							SAFE_RELEASE_IDEV(pCap);
							break;
						}
					}
				}
				SAFE_RELEASE_IDEV(pPropBag);
				SAFE_RELEASE_IDEV(pMoniker);
		}
	}

PEnd:
	SAFE_RELEASE_IDEV(pDevEnum);
	SAFE_RELEASE_IDEV(pEnum);
	if(nRet != 1) {
		nRet = 0;
	}
	return nRet;
}

int GetCameraCount()
{
	ICreateDevEnum *pDevEnum = NULL;
	IEnumMoniker *pEnum = NULL;
	int deviceCounter = 0;
	HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,
		CLSCTX_INPROC_SERVER, IID_ICreateDevEnum,
		reinterpret_cast<void**>(&pDevEnum));
	if (SUCCEEDED(hr)) {
		hr = pDevEnum->CreateClassEnumerator(
			CLSID_VideoInputDeviceCategory,
			&pEnum, 0);
		if(hr == S_OK){
			IMoniker *pMoniker = NULL;
			while (pEnum->Next(1, &pMoniker, NULL) == S_OK){
				IPropertyBag *pPropBag;
				hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag,
					(void**)(&pPropBag));
				if (FAILED(hr)){
					pMoniker->Release();
					continue;  // Skip this one, maybe the next one will work.
				}
				pPropBag->Release();
				pPropBag = NULL;

				pMoniker->Release();
				pMoniker = NULL;

				deviceCounter++;
			}
			pEnum->Release();
			pEnum = NULL;
		}
		pDevEnum->Release();
		pDevEnum = NULL;
	}
	return deviceCounter;
}

int UpdateCameraInfors(CAMERA_BUCKET& vtCameraList)
{
	int old_count = vtCameraList.size();
	if(old_count > 0) {
		DestoryCamereBuckets(vtCameraList);
	}
	GetCameraInfors(vtCameraList);
	return old_count;
}

int ExclusiveCameraBuckes(const CAMERA_BUCKET& lhs, const CAMERA_BUCKET& rhs, CAMERA_BUCKET& diff)
{
	int count = 0;
	const size_t l_size = lhs.size();
	const size_t r_size = rhs.size();
	if(!diff.empty()) {
		DestoryCamereBuckets(diff);
	}
	//Is it necessary to sort before doing comparation job ? 
	if(l_size > r_size) {
		for(CAMERA_BUCKET_CITER citer=lhs.cbegin(); citer!=lhs.cend(); ++citer) {
			auto aim = std::find_if(rhs.cbegin(), rhs.cend(), 
				[citer](PCAMERA_INFOR_ITEM const item){
				return !strcmp(item->szDevPath, (*citer)->szDevPath);
			});
			if(aim == rhs.cend()) {
				PCAMERA_INFOR_ITEM item = new CAMERA_INFOR_ITEM();
				if(item != NULL) {
					item->Copy((*citer));
					diff.push_back(item);
					count++;
				}
			}
		}
	} else if(l_size < r_size) {
		for(CAMERA_BUCKET_CITER citer=rhs.cbegin(); citer!=rhs.cend(); ++citer) {
			auto aim = std::find_if(lhs.cbegin(), lhs.cend(), [citer](PCAMERA_INFOR_ITEM const item){
				return !strcmp(item->szDevPath, (*citer)->szDevPath);
			});
			if(aim == lhs.cend()) {
				PCAMERA_INFOR_ITEM item = new CAMERA_INFOR_ITEM();
				if(item != NULL) {
					item->Copy((*citer));
					diff.push_back(item);
					count++;
				}
			}
		}
	}
	return count;

}

void DisplayCameraInfos(const CAMERA_BUCKET& vtCameraList)
{
	for(CAMERA_BUCKET_CITER it=vtCameraList.cbegin(); it!=vtCameraList.cend(); ++it) {
		if(*it) {
			(*it)->Display();
		}else {
			LOG_ASSERT(!"Empty elememt occurs !!");
		}
	}
}

void OnMouseTrace(int evt, int x, int y, int flags, void* param = NULL);

const Scalar RED = Scalar(0,0,255);
const Scalar PINK = Scalar(230,130,255);
const Scalar BLUE = Scalar(255,0,0);
const Scalar LIGHTBLUE = Scalar(255,255,160);
const Scalar GREEN = Scalar(0,255,0);
const Scalar BLACK = Scalar(0, 0, 0);
const Scalar ERROR_GRAY = Scalar(205, 205, 205);

const int WAITKEY_TIME = 30;
const DWORD ERROR_CONTINUE_MILLSEC = 3000;
const int ERROR_CONTINUE_TIMES = ERROR_CONTINUE_MILLSEC / WAITKEY_TIME;

CDocScannerCap::CDocScannerCap(CPortableScannerFSM* pFSM)
	:m_videoID(-1)
    ,m_hrCoInited(S_FALSE)
	,m_defWnd(NULL)
	,m_dwErrCode(ERROR_SUCCESS)
	,m_hPreviewPro(NULL)
	,m_fPreviewing(false)
	,m_colorMode(COLORFUL)
	,m_roiMode(ROI_DEFAULT)
	,m_roiRate(1.0f)
	,m_bHide(FALSE)
	,m_winSize(DR_X, DR_Y, DR_W, DR_H)
	,rectStatus(NOT_SET)
	,m_pFSM(pFSM)
	,m_bHSPSType(false)
{
	m_hrCoInited = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
}

CDocScannerCap::~CDocScannerCap(void)
{

	LOG_FUNCTION();

#if 1

	//let VideoCapture object invoke release at destructor.
	_cleanup(false);

	RequestQueueCleanup();
	destroyAllWindows();

#endif

	if(m_hrCoInited == S_OK) {
		CoUninitialize();
	}
}

void CDocScannerCap::Test()
{
//	cv::VideoCapture videoCap(0);
//	if(!videoCap.isOpened())
//	{
//		return;
//	}
//	cv::Mat edges;
//#define WINDOWS_TITLE "edges"
//	cv::namedWindow(WINDOWS_TITLE);
//	moveWindow(WINDOWS_TITLE, 0, 0);
//	setWindowProperty(WINDOWS_TITLE, CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);
//	//HWND hWin = FindWindow(NULL, WINDOWS_TITLE);
//	HWND hWin = (HWND)cvGetWindowHandle(WINDOWS_TITLE);
//	DWORD dwFlag = SWP_SHOWWINDOW | SWP_NOSIZE | SWP_NOZORDER;
//	dwFlag &= ~SWP_NOSIZE;
//	if(hWin == NULL)
//	{
//		LOG_TRACE("Find %s window handle faiiled, GLE=%u", WINDOWS_TITLE, GetLastError());
//	}
//	SetWindowPos(hWin, HWND_NOTOPMOST, 128, 128, edges.cols, edges.rows, dwFlag);
//	//Bordorless
//	SetWindowLong(hWin, GWL_STYLE, GetWindowLong(hWin, GWL_EXSTYLE) | WS_EX_TOPMOST | WS_EX_LAYERED);
//	SetLayeredWindowAttributes(hWin, RGB(255,255,255), 0, LWA_COLORKEY);
//	SetWindowLong(hWin, GWL_STYLE, GetWindowLong(hWin, GWL_EXSTYLE) 
//		& (~WS_CAPTION) 
//		& (~WS_BORDER) 
//		& (~WS_THICKFRAME));
//	ShowWindow(hWin, SW_SHOW);
//	for(;;)
//	{
//		cv::Mat cameraFrame;  
//		videoCap >> cameraFrame ;  
//		imshow(WINDOWS_TITLE, cameraFrame); 
//		if(cv::waitKey(30) >= 0) {
//			cameraFrame.release();
//			destroyWindow(WINDOWS_TITLE);
//			break;
//		}
//	}
}

bool CDocScannerCap::InitHwndForNotify()
{
	static char szWindowClass[] = "Win32_DocScannerCap";
	static char szTitle[] = "Win32 Document Scanner Notificer";
	//get instance of current program (self)
	HINSTANCE hInstance = GetModuleHandle (NULL);
	char szPcName[MAX_PATH] = {0};
	DWORD nSize = sizeof(szPcName);
	GetComputerName(szPcName, &nSize);
	WNDCLASSEX wcex;
	wcex.cbSize = sizeof(WNDCLASSEX);
	wcex.style = CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc = CameraNotifierProc;
	wcex.cbClsExtra = 0;
	wcex.cbWndExtra = 0;
	wcex.hInstance = hInstance;
	wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
	wcex.lpszMenuName = NULL;
	wcex.lpszClassName = szWindowClass;
	wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
	if (!RegisterClassEx(&wcex))
	{
		return false;
	}
	HWND hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT,
		CW_USEDEFAULT,
		CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);
	if (!hWnd)
	{
		return false;
	}
	ShowWindow(hWnd, SW_HIDE);
	UpdateWindow(hWnd);
	g_hInnerWnd = hWnd;
	return true;
}

bool CDocScannerCap::RegisterVideoNotify()
{
	DEV_BROADCAST_DEVICEINTERFACE filterData;
	ZeroMemory(&filterData, sizeof(DEV_BROADCAST_DEVICEINTERFACE));
	filterData.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
	filterData.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
	filterData.dbcc_classguid = AM_KSCATEGORY_VIDEO;
	g_hDevNotify = RegisterDeviceNotification(g_hInnerWnd, &filterData, DEVICE_NOTIFY_WINDOW_HANDLE);
	if (g_hDevNotify == NULL) {
		return false;
	}
	return true;
}

bool CDocScannerCap::UnRegisterVideoNotify()
{
	if (g_hDevNotify != NULL) {
		UnregisterDeviceNotification(g_hDevNotify);
		g_hDevNotify = NULL;
	}
	return true;
}

bool CDocScannerCap::Open(unsigned int idx)
{
	if(m_cvCap.isOpened()) {
		_cleanup();
	}
	//the method first call release to close alreay opened file or camera
	m_cvCap.open(idx);
	if(!m_cvCap.isOpened()) {
		DbgWithLink(LOG_LEVEL_ERROR, LOG_TYPE_SYSTEM)("open failed:");
		m_dwErrCode = ERROR_OPEN_FAILED;
		winName.clear();
		return false;
	}
	_setProperty();

	{
		CAMERA_INFOR_ITEM item;
		if(GetSpecificedCamInfor(idx, &item) > 0) {
			_setDevName(item.szDevName);
			winName = cv::String(DEFAULT_MAT_WINDOW_NAME) + "-" + devName;
		}else {
			CHAR szDevIndex[128] = {0};
			sprintf_s(szDevIndex, "%s-%d", DEFAULT_MAT_WINDOW_NAME, idx);
			winName = szDevIndex;
			_setDevName("");
		}
	}
	m_videoID = idx;
	m_dwErrCode = ERROR_SUCCESS;
	return true;
}

void CDocScannerCap::_setProperty()
{
	//设置为不一样的分辨率，会出现耗时，1.5s 长城
	//SetResoultionRatio(1920, 1080);
}

bool CDocScannerCap::OpenCamera(LPCTSTR lpcszDev)
{
	if(lpcszDev == NULL) {
		m_dwErrCode = ERROR_INVALID_PARAMETER;
		return false;
	}

	const int camId = _getCamIDByDevName(lpcszDev);
	if(camId < 0) {
		m_dwErrCode = ERROR_FILE_NOT_FOUND;
		DbgWithLink(LOG_LEVEL_ERROR, LOG_TYPE_SYSTEM)("not found camera id.");
		return false;
	}

	//const int nRes = IsDeviceBusy(lpcszDev);
	//if(nRes) {
	//	if(nRes == -2) {
	//		m_dwErrCode = ERROR_INVALID_ACCESS;
	//	} else if(nRes == -1) {
	//		m_dwErrCode = ERROR_FILE_NOT_FOUND;
	//	} else if(nRes == 1) {
	//		m_dwErrCode = ERROR_DEVICE_IN_USE;
	//	} else {
	//		m_dwErrCode = ERROR_BAD_ENVIRONMENT;
	//	}
	//	return false;
	//}

	if(Open(camId)) 
	{
		if(devName.empty())
			_setDevName(lpcszDev);
		return true;
	}

	return false;
}

bool CDocScannerCap::ScanImage(const char* lpcszFilePath)
{
	if(!m_fPreviewing) {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM)("Request scaning without in previewing.");
		m_dwErrCode = ERROR_INVALID_ENVIRONMENT;
		return false;
	}
	if(lpcszFilePath == NULL) {
		m_dwErrCode = ERROR_INVALID_PARAMETER;
		return false;
	}
	char szFileName[MAX_PATH] = {0};
	int len = strlen(lpcszFilePath);
	if(len == 0) {
		_combineFileName(szFileName, MAX_PATH);
		cv::String strFileName("C:\\");
		strFileName += szFileName;
		strFileName += ".jpg";
		strcpy_s(szFileName, strFileName.c_str());
	}
	else {
		strcpy_s(szFileName, lpcszFilePath);
	}
	len = strlen(szFileName);
	if(len == 0) {
		m_dwErrCode = ERROR_INVALID_PARAMETER;
		return false;
	}

	RequestEventPtr item = CreateRequestEvent(EVTCODE_SCAN);
	if(!item) {
		m_dwErrCode = ERROR_RESOURCE_FAILED;
		return false;
	}
	item->evtData = (CHAR*)malloc(sizeof(char)*(len+1));
	if(item->evtData == NULL) {
		DbgWithLink(LOG_LEVEL_ERROR, LOG_TYPE_SYSTEM)("malloc failed");
		m_dwErrCode = ERROR_RESOURCE_FAILED;
		delete item;
		return false;
	}
	memset(item->evtData, 0, sizeof(char)*(len+1));
	strcpy_s(item->evtData, sizeof(char)*(len+1), szFileName);
	item->dwDataLen = len+1;
	PostIntoRequestQueue(&item);
	int nRes = WaitForResponse(EVTCODE_SCAN, 30*1000);
	DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM)("WaitForResponse returned: 0x%02x", nRes);
	if(nRes >= EVTSTATUS_ERROR_MASK) {

	}
	else if(nRes == EVTSTATUS_DONE_SUCC) {
		DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM)("Scan succ: %d[%s]", ExistsFileA(szFileName), szFileName);
	}
	return true;
}

bool CDocScannerCap::CloseCamera()
{
	_cleanup();
	m_dwErrCode = ERROR_SUCCESS;
	return true;
}

bool CDocScannerCap::StartPreview()
{
	if(!_isVal()){
		m_dwErrCode = ERROR_INVALID_ENVIRONMENT;
		return false;
	}
	if(m_fPreviewing) {
		m_dwErrCode = SCHED_E_ALREADY_RUNNING;
		return false;
	}
	m_hPreviewPro = reinterpret_cast<HANDLE>(_beginthreadex(NULL, 0, 
		CDocScannerCap::WndPreviewDlgProc, this,
		CREATE_SUSPENDED,
		NULL));
	if(m_hPreviewPro == NULL || m_hPreviewPro == INVALID_HANDLE_VALUE)
	{
		m_hPreviewPro = NULL;
		m_dwErrCode = E_HANDLE;
		return false;
	}
	m_fPreviewing = true;
	if(ResumeThread(m_hPreviewPro) == (DWORD)-1) {
		m_dwErrCode = E_UNEXPECTED;
		m_fPreviewing = false;
		CloseHandle(m_hPreviewPro);
		m_hPreviewPro = NULL;
		return false;
	}
	m_dwErrCode = ERROR_SUCCESS;
	return true;
}

bool CDocScannerCap::TerminatePreview()
{
	m_dwErrCode = ERROR_SUCCESS;
	if(m_fPreviewing) {
		m_dwErrCode = E_UNEXPECTED;
		m_tpStopPreview = true;
		//30 seconds to timeout?
		DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM)("Set StopPreivew flag true, waitting...");
		DWORD dwResult = WaitForSingleObject(m_hPreviewPro, 30 * 1000);
		if(dwResult == WAIT_OBJECT_0) {
			DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM)("Wait succ.");
			CloseHandle(m_hPreviewPro);
			m_hPreviewPro = NULL;
			m_dwErrCode = ERROR_SUCCESS;
			return true;
		}else if(dwResult == WAIT_TIMEOUT) {
			DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM)("Wait succ timeout: %d", m_fPreviewing);
			if(!m_fPreviewing) {
				CloseHandle(m_hPreviewPro);
				m_hPreviewPro = NULL;
				m_dwErrCode = ERROR_SUCCESS;
				return true;
			}
			m_dwErrCode = WAIT_TIMEOUT;
		}
		else {
			DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM)("WaitForSingleObject failed returned: %u.", dwResult);
			m_dwErrCode = dwResult;
		}
	}
	return (m_dwErrCode == ERROR_SUCCESS);
}

bool CDocScannerCap::_initWindow(bool fShown)
{
	if(m_defWnd) {
		_destroyWindow();
	}
	//TODO: Identify the window name to unique.
	DWORD wdFlags = WINDOW_NORMAL;
	namedWindow(winName, wdFlags);
	m_defWnd = FindWindow(NULL, winName.c_str());
	if(m_defWnd == NULL) {
		destroyWindow(winName);
		m_dwErrCode = ERROR_INVALID_WINDOW_HANDLE;
		DbgWithLink(LOG_LEVEL_ERROR, LOG_TYPE_SYSTEM)("Find %s window handle faiiled, GLE=%u", winName.c_str(), GetLastError());
		return false;
	}
	DWORD dwFlag = fShown ? SWP_SHOWWINDOW : SWP_HIDEWINDOW;
	BOOL bRet = ::SetWindowPos(m_defWnd, HWND_TOPMOST, 
		m_winSize.x, m_winSize.y, m_winSize.width, m_winSize.height, dwFlag);
	if(bRet) { m_bHide = !fShown; }
	m_dwErrCode = ERROR_SUCCESS;
	rectStatus = NOT_SET;
	return true;
}

void CDocScannerCap::_destroyWindow()
{
	LOG_FUNCTION();
	if(!m_cmFrame.empty()) {
		m_cmFrame.release();
	}
	if(m_defWnd) {
		DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("before destroyWindow with %s", winName.c_str());
		destroyWindow(winName);
		DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("after destroyWindow with %s", winName.c_str());
		m_defWnd = NULL;
		m_bHide = FALSE;
	}
	DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("before destroyAllWindow");
	destroyAllWindows();
	DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("after destroyAllWindow");
	return;
}

size_t CDocScannerCap::_combineFileName(char* szFnBuf, size_t sizeLen)
{
	if(sizeLen == 0 || szFnBuf == NULL) {
		return 0;
	}
	memset(szFnBuf, 0, sizeof(char)*sizeLen);
	SYSTEMTIME st;
	GetLocalTime(&st);
	sprintf_s(szFnBuf, sizeLen, "%04d%02d%02d%02d%02d%02d.jpg", st.wYear, st.wMonth, st.wDay,
		st.wHour, st.wMinute, st.wSecond);
	return strlen(szFnBuf);
}

UINT WINAPI CDocScannerCap::WndPreviewDlgProc(PVOID param)
{
	CDocScannerCap *pCap = reinterpret_cast<CDocScannerCap*>(param);
	if(pCap == NULL) {
		return UINT(-1);
	}
	return (UINT)(pCap->_executePreview());
}

void CDocScannerCap::EvtFinishedHandle(USHORT evtCode, UCHAR result, UINT checksum)
{

}

void CDocScannerCap::SetResoultionRatio(int width, int height, int nframes /*= -1*/)
{
	// DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("before: width=%d, height=%d , nframes=%d", (int)m_cvCap.get(CAP_PROP_FRAME_WIDTH), 
	// 	(int)m_cvCap.get(CAP_PROP_FRAME_HEIGHT), (int)m_cvCap.get(CAP_PROP_FRAME_COUNT));
	m_cvCap.set(CV_CAP_PROP_FRAME_WIDTH, width);
	m_cvCap.set(CV_CAP_PROP_FRAME_HEIGHT, height);
	// DDbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)g("after: width=%d, height=%d , nframes=%d", (int)m_cvCap.get(CAP_PROP_FRAME_WIDTH), 
	// 	(int)m_cvCap.get(CAP_PROP_FRAME_HEIGHT), (int)m_cvCap.get(CAP_PROP_FRAME_COUNT));
}

void CDocScannerCap::_setMouseCallback()
{
	cvSetMouseCallback(winName.c_str(), OnMouseTrace, this);
}

void CDocScannerCap::MouseClick(int event, int x, int y, int flags)
{
	//static Rect origin;
	if(event == CV_EVENT_LBUTTONDOWN) {
		rectStatus = IN_PROCESS;
		rect = Rect(x, y, 0, 0);

	} else if(event == CV_EVENT_MOUSEMOVE) {

		if(rectStatus == IN_PROCESS) {
			rect = Rect(Point(rect.x, rect.y), Point(x,y));
		}

	}else if(event == CV_EVENT_LBUTTONUP) {

		if(rectStatus == IN_PROCESS) {

			if(rect.height == 0 || rect.width == 0) {
				rectStatus = NOT_SET;
				return;
			}
			rect = Rect(Point(rect.x, rect.y), Point(x,y));
			rectStatus = SET;
		}
	}
}

void CDocScannerCap::_setResizeArea(float ratio)
{
	Rect area((1-ratio)/2*m_cmFrame.cols, (1-ratio)/2*m_cmFrame.rows, ratio*m_cmFrame.cols, ratio*m_cmFrame.rows);
	Mat roi = m_cmFrame(area);
	Mat res;
	res.create(roi.rows, roi.cols, m_cmFrame.type());
	roi.copyTo(res);
	m_cmFrame.release();
	m_cmFrame = res;
}

void CDocScannerCap::_setInterestArea()
{
	if(rectStatus == IN_PROCESS || rectStatus == SET) {

		Rect area(rect);
		int suffix_x = rect.x - drawableRect.x;
		int suffix_y = rect.y - drawableRect.y;

		area.x = suffix_x > 0 ? rect.x : drawableRect.x;
		area.y = suffix_y > 0 ? rect.y : drawableRect.y;

		suffix_x = suffix_x > 0 ? suffix_x : 0;
		suffix_y = suffix_y > 0 ? suffix_y : 0;

		area.width = min(rect.width, drawableRect.width-suffix_x-rectangle_thickness);
		area.height = min(rect.height, drawableRect.height-suffix_y-rectangle_thickness);

		rectangle(m_cmFrame, Point(area.x, area.y), 
			Point(area.x + area.width, area.y + area.height),
			GREEN, rectangle_thickness);
		assert(m_cmFrame.data);
		const CvScalar colorMask = cvScalarAll(-52);
		Mat res = Mat::ones(m_cmFrame.size(), CV_8UC1)*255;
		res(area).setTo(0);
		cv::add(m_cmFrame, (const cv::Scalar&)colorMask, m_cmFrame, res, m_cmFrame.type());
		rect = area;
	}
}

bool CDocScannerCap::_executePreview()
{
	_initWindow(true);
	m_tpStopPreview = false;
	_setMouseCallback();
	if (GetWindowLong(m_defWnd, GWL_STYLE) & WS_POPUP) {
		SetThreadExecutionState(ES_CONTINUOUS | ES_SYSTEM_REQUIRED | ES_DISPLAY_REQUIRED);
	}
	int eOccurTimes = 0, eClosedTimes = 0;
	DWORD dwEStartTick = 0;
	char szFileName[MAX_PATH] = {0};
	for(;;)
	{
		m_cvCap >> m_cmFrame;
		if(!m_cmFrame.data) {
			continue;
		}

		Mat gray = m_cmFrame.clone();
		cvtColor(m_cmFrame, gray, CV_BGR2GRAY);
		if(IsColorAbnormal(&IplImage(gray))) {

			IplImage* inner = &IplImage(gray);
			int B = CV_IMAGE_ELEM(inner, unsigned char, inner->height/2, (inner->width/2)*3+0);
			int G = CV_IMAGE_ELEM(inner, unsigned char, inner->height/2, (inner->width/2)*3+1);
			int R = CV_IMAGE_ELEM(inner, unsigned char, inner->height/2, (inner->width/2)*3+2);
			if(B == G && G == R && R == 205) {

				if(eOccurTimes == 0) {
					eOccurTimes++;
					DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM)("Wow! the scanner has problem");
					dwEStartTick = GetTickCount();
				
				}else if(eOccurTimes != -1) {
					eOccurTimes++;
					if(eOccurTimes >= ERROR_CONTINUE_TIMES
						|| GetTickCount() > dwEStartTick + ERROR_CONTINUE_MILLSEC) {
						DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM)("Send Reset Event !! %d", eOccurTimes);
						eOccurTimes = -1;
						SetResetEvent();
					}
				}

			}else if(eOccurTimes != 0){
				eOccurTimes = 0;
			}
			
			if(B == G && G == R && B == 0) {

				if(eClosedTimes == 0) {
					DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("Eh, maybe forget to scratch the scanner");
					eClosedTimes = 1;
				}
			
			}else if(eClosedTimes != 0){
				DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("Ok, you achieve it");
				eClosedTimes = 0;
			}
		
		} else {
			
			if(eOccurTimes != 0 && eOccurTimes != -1) {
				eOccurTimes = 0;
			}

			if(eClosedTimes != 0){
				DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("Ok, you achieve it");
				eClosedTimes = 0;
			}
		}
		gray.release();

		if(m_roiMode != ROI_DEFAULT && m_bHSPSType) {
			_setResizeArea(m_roiRate);
		}

		if(m_colorMode == GRAY) {
			cvtColor(m_cmFrame, m_cmFrame, CV_BGR2GRAY);
		}

		Mat origin = m_cmFrame.clone();
		int cols = 0, rows = 0;
		{//填充边框以适应宽度
			Size origin_size = m_cmFrame.size();
			if(1.0*m_winSize.width / m_winSize.height > 1) {
				int aimWidth = (int)(1.0*origin_size.height*(1.0*m_winSize.width / m_winSize.height));
				if(aimWidth > origin_size.width) {
					cols = (aimWidth-origin_size.width) / 2;
				}else if(aimWidth < origin_size.width) {
					int aimHeigth = (int)(1.0*origin_size.width*(1.0*m_winSize.height / m_winSize.width));
					assert(aimHeigth >= origin_size.height);
					rows = (aimHeigth-origin_size.height) / 2;
				}
			}else if(1.0*m_winSize.width / m_winSize.height < 1) {
				int aimHeigth = (int)(1.0*origin_size.width*(1.0*m_winSize.height / m_winSize.width));
				if(aimHeigth > origin_size.height) {
					rows = (aimHeigth-origin_size.height) / 2;
				}else if(aimHeigth < origin_size.height) {
					int aimWidth = (int)(1.0*origin_size.height*(1.0*m_winSize.width / m_winSize.height));
					assert(aimWidth >= origin_size.width);
					cols = (aimWidth-origin_size.width) / 2;
				}
			}
		}
		if(cols > 0 || rows > 0) {
			copyMakeBorder(m_cmFrame, m_cmFrame, rows, rows, cols, cols, BORDER_CONSTANT, BLACK);
		}
		drawableRect.x = cols;
		drawableRect.width = origin.cols;
		drawableRect.y = rows;
		drawableRect.height = origin.rows;

		Mat picture = m_cmFrame.clone();
		_setInterestArea();
		imshow(winName, m_cmFrame);
		char keyCode = cvWaitKey(WAITKEY_TIME);
		//if(keyCode == 27) {
		//	DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM)("ESC key press event recv.");
		//	break;
		//}
		RequestEventPtr evtPtr = GetRequest();
		if(evtPtr) {
			DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("0x%02x event recv.", evtPtr->evtCode);
			switch(evtPtr->evtCode)
			{
			case EVTCODE_SCAN:
				{
					assert(evtPtr->valType == RequestEvent::ReqLen);
					assert(evtPtr->dwDataLen > 0 && evtPtr->evtData);
					char szFileName[MAX_PATH+1] = {0};
					memcpy_s(szFileName, MAX_PATH*sizeof(char), 
						evtPtr->evtData, sizeof(char)*evtPtr->dwDataLen);

					try 
					{
						cv::Mat testMat;

						if(rectStatus == SET && (rect.width != 0 && rect.height != 0)) {
							Mat result(picture, rect);
							DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("ScanImage@1: %s %d", szFileName, result.size());
							testMat = result.clone();
						} else {
							DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("ScanImage@2: %s %d", szFileName, origin.size());
							testMat = origin.clone();
						}

						ImageWriteUntil(szFileName, testMat);

						evtPtr->evtStatus = EVTSTATUS_DONE_SUCC;
					}
					catch(cv::Exception& ex)
					{
						DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM)("exception converting image to jpeg: %s", ex.what());
						evtPtr->evtStatus = EVTSTATUS_DONE_FAIL;
					}
					evtPtr->OnAnswer();
				}
				break;
			default:
				{

				}
				break;
			}
		}
		if(m_tpStopPreview) {
			DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM)("Stop previewing event recv.");
			break;
		}
	}
	SetThreadExecutionState(ES_CONTINUOUS);
	_destroyWindow();
	m_fPreviewing = false;
	return true;
}

int CDocScannerCap::GetSpecificedCamInfor(const int camID, PCAMERA_INFOR_ITEM info)
{
	if(info == NULL) {
		return -2;
	}
	info->Cleanup();
	ICreateDevEnum *pSysDevEnum = NULL;
	HRESULT hr = CoCreateInstance(
		CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, 
		IID_ICreateDevEnum, (void **)&pSysDevEnum);
	if (FAILED(hr)) {
		return -1;
	}
	BOOL done = false;
	int deviceCounter = 0;

	// Obtain a class enumerator for the video input category.
	IEnumMoniker *pEnumCat = NULL;
	hr = pSysDevEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory, &pEnumCat, 0);
	if (hr == S_OK) {
		// Enumerate the monikers.
		IMoniker *pMoniker = NULL;
		ULONG cFetched;
		while ((pEnumCat->Next(1, &pMoniker, &cFetched) == S_OK) && (!done)) {
			if(deviceCounter == camID) {
				// Bind the first moniker to an object
				IPropertyBag *pPropBag;
				hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag, (void **)&pPropBag);
				if (SUCCEEDED(hr)) {
					// To retrieve the filter's friendly name, do the following:
					VARIANT varName;
					VariantInit(&varName);
					hr = pPropBag->Read(L"Description", &varName, 0);
					if (FAILED(hr)) {
						hr = pPropBag->Read(L"FriendlyName", &varName, 0);
					}
					if (SUCCEEDED(hr)) {
						hr = pPropBag->Read(L"FriendlyName", &varName, 0);
						int maxLen = sizeof(info->szDevName) - 2;
						int nLen = WrapW2A(varName, &(info->szDevName[0]), maxLen);
						VariantClear(&varName);
					}
					VARIANT varCLSID;
					VariantInit(&varCLSID);
					hr = pPropBag->Read(L"CLSID", &varCLSID, 0);
					if (SUCCEEDED(hr)) {
						int maxLen = sizeof(info->szCLSID) - 2;
						int nLen = WrapW2A(varCLSID, &(info->szCLSID[0]), maxLen);
						VariantClear(&varCLSID);
					}
					VARIANT varDevPath;
					VariantInit(&varDevPath);
					hr = pPropBag->Read(L"DevicePath", &varDevPath, 0);
					if (SUCCEEDED(hr)) {
						int maxLen = sizeof(info->szDevPath) - 2;
						int nLen = WrapW2A(varDevPath, &(info->szDevPath[0]), maxLen);
						VariantClear(&varDevPath);
					}
					VARIANT varWaveID;
					VariantInit(&varWaveID);
					hr = pPropBag->Read(L"WaveInID", &varWaveID, 0);
					if (SUCCEEDED(hr)) {
						info->uWaveInID = varWaveID.lVal;
						VariantClear(&varWaveID);
					}
					pPropBag->Release();
					pPropBag = NULL;
					pMoniker->Release();
					pMoniker = NULL;

					done = TRUE;
				}
			}
			deviceCounter++;
		}
		pEnumCat->Release();
		pEnumCat = NULL;
	}
	pSysDevEnum->Release();
	pSysDevEnum = NULL;

	if (done) {
		return 1;
	}
	return 0;
}

int CDocScannerCap::_getCamIDByDevName(LPCTSTR lpcszDevName)
{
	if (lpcszDevName == NULL || strlen(lpcszDevName) == 0) {
		return -2;
	}
	ICreateDevEnum *pDevEnum = NULL;
	IEnumMoniker *pEnum = NULL;
	int deviceCounter = 0;
	int aimID = -1;
	bool done = false;
	HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL,
		CLSCTX_INPROC_SERVER, IID_ICreateDevEnum,
		reinterpret_cast<void**>(&pDevEnum));
	if (SUCCEEDED(hr)) {
		// Create an enumerator for the video capture category.
		hr = pDevEnum->CreateClassEnumerator(
			CLSID_VideoInputDeviceCategory,
			&pEnum, 0);
		if(hr == S_OK) {
			IMoniker *pMoniker = NULL;
			while (pEnum->Next(1, &pMoniker, NULL) == S_OK && (!done)) {

				IPropertyBag *pPropBag;
				hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag,
					(void**)(&pPropBag));
				if (FAILED(hr)){
					pMoniker->Release();
					continue;  // Skip this one, maybe the next one will work.
				}
				// Find the description or friendly name.
				VARIANT varName;
				VariantInit(&varName);
				hr = pPropBag->Read(L"Description", &varName, 0);
				if (FAILED(hr)) hr = pPropBag->Read(L"FriendlyName", &varName, 0);
				if (SUCCEEDED(hr)){
					hr = pPropBag->Read(L"FriendlyName", &varName, 0);
					char szDevName[MAX_PATH + 2] = {0};
					int count = 0;
					WrapW2A(varName, szDevName, MAX_PATH);
					if(strcmp(szDevName, lpcszDevName) == 0) {
						done = true;
						aimID = deviceCounter;
					}
				}
				pPropBag->Release();
				pPropBag = NULL;

				pMoniker->Release();
				pMoniker = NULL;

				deviceCounter++;
			}

			pDevEnum->Release();
			pDevEnum = NULL;

			pEnum->Release();
			pEnum = NULL;
		}
	}
	return aimID;
}


bool CDocScannerCap::IsColorAbnormal(IplImage* src)
{
	const int threshold = 3;

	const int width = src->width;
	const int height = src->height;
	int imax = 0, imin = 255;
	uchar *content = (uchar*)src->imageData;
	int step = src->widthStep/sizeof(uchar);

	for (int i=0; i<height; ++i) {
		for(int j=0; j<width; ++j) {
			int term = (int)content[i*step+j];
			if(term > imax) {
				imax = term;
			}
			if(term < imin) {
				imin = term;
			}
		}
	}
	if(imax - imin < threshold) {
		return true;
	}
	return false;
}

bool CDocScannerCap::IsFrameFuzzy(IplImage* data)
{
	//图片每行字节数及高
	int width=data->widthStep;
	int height=data->height;
	ushort* sobelTable = new ushort[width*height];
	memset(sobelTable, 0, width*height*sizeof(ushort));

	int i, j, mul;
	//指向图像首地址
	uchar* udata = (uchar*)data->imageData;
	for(i = 1, mul = i*width; i < height - 1; i++, mul += width) {
		for(j = 1; j < width - 1; j++) {
			sobelTable[mul+j]=abs(udata[mul+j-width-1] + 2*udata[mul+j-1] + udata[mul+j-1+width] -\
			udata[mul+j+1-width] - 2*udata[mul+j+1] - udata[mul+j+width+1]);
		}
	}


	for(i = 1, mul = i*width; i < height - 1; i++, mul += width) {
		for(j = 1; j < width - 1; j++) {
			if(sobelTable[mul+j] < 50 || sobelTable[mul+j] <= sobelTable[mul+j-1] ||\
				sobelTable[mul+j] <= sobelTable[mul+j+1]) sobelTable[mul+j] = 0;
		}
	}
	int totLen = 0;
	int totCount = 1;

	uchar suddenThre = 50;
	uchar sameThre = 3;
	//遍历图片
	for(i = 1, mul = i*width; i < height - 1; i++, mul += width) {
		for(j = 1; j < width - 1; j++) {
			if(sobelTable[mul+j]) {
				int   count = 0;
				uchar tmpThre = 5;
				uchar max = udata[mul+j] > udata[mul+j-1] ? 0 : 1;

				for(int t = j; t > 0; t--) {
					count++;
					if(abs(udata[mul+t] - udata[mul+t-1]) > suddenThre) {
						break;
					}
					if(max && udata[mul+t] > udata[mul+t-1]) {
						break;
					}
					if(!max && udata[mul+t] < udata[mul+t-1]) {
						break;
					}
					int tmp = 0;
					for(int s = t; s > 0; s--) { 
						if(abs(udata[mul+t] - udata[mul+s]) < sameThre) {
							tmp++;
							if(tmp > tmpThre) {
								 break;
							}
						}
						else {
							break;
						}
					}

					if(tmp > tmpThre) break;
				}

				max = udata[mul+j] > udata[mul+j+1] ? 0 : 1;

				for(int t = j; t < width; t++) {
					count++;
					if(abs(udata[mul+t] - udata[mul+t+1]) > suddenThre) {
						break;
					}
					if(max && udata[mul+t] > udata[mul+t+1]) {
						break;
					}
					if(!max && udata[mul+t] < udata[mul+t+1]) {
						break;
					}
					int tmp = 0;
					for(int s = t; s < width; s++) {
						if(abs(udata[mul+t] - udata[mul+s]) < sameThre) {
							tmp++;
							if(tmp > tmpThre) {
								 break;
							}
						}
						else {
							 break;
						}
					}

					if(tmp > tmpThre) {
						 break;
					}
				}

				max = udata[mul+j] > udata[mul+j+1] ? 0 : 1;

				for(int t = j; t < width; t++) {
					count++;
					if(abs(udata[mul+t] - udata[mul+t+1]) > suddenThre) {
						break;
					}
					if(max && udata[mul+t] > udata[mul+t+1]) {
						break;
					}
					if(!max && udata[mul+t] < udata[mul+t+1]) {
						break;
					}
					int tmp = 0;
					for(int s = t; s < width; s++) {
						if(abs(udata[mul+t] - udata[mul+s]) < sameThre) {
							tmp++;
							if(tmp > tmpThre) {
								break;
							}
						}
						else {
							break;
						}
					}

					if(tmp > tmpThre) {
						break;
					}
				}
				count--;

				totCount++;
				totLen += count;
			}
		}
	}
	//模糊度
	float result = (float)totLen/totCount;
	delete[] sobelTable;
	if(result > 5) {
		return true;
	}
	return false;
}

bool CDocScannerCap::ResetCamera()
{
	if(!_isVal() && m_videoID == -1) {
		return true;
	}
	bool fPreview = m_fPreviewing;
	BOOL bHide = m_bHide;
	if(m_fPreviewing) {
		TerminatePreview();
		do {
			Sleep(100);
		} while (m_fPreviewing);
	}


	if(m_cvCap.isOpened()) {
		m_cvCap.release();
	}
	CAMERA_INFOR_ITEM item;
	if(GetSpecificedCamInfor(m_videoID, &item) <= 0) {
		m_dwErrCode = ERROR_FILE_NOT_FOUND;
		_cleanup();
		return true;
	}
	int nRes = IsDeviceBusy(item.szDevName);
	if(nRes) {
		if(nRes == -2) {
			m_dwErrCode = ERROR_INVALID_ACCESS;
		} else if(nRes == -1) {
			m_dwErrCode = ERROR_FILE_NOT_FOUND;
		} else if(nRes == 1) {
			m_dwErrCode = ERROR_DEVICE_IN_USE;
		} else {
			m_dwErrCode = ERROR_BAD_ENVIRONMENT;
		}
		_cleanup();
		return true;
	}
	m_cvCap.open(m_videoID);
	if(!m_cvCap.isOpened()) {
		_cleanup();
		return false;
	}
	_destroyWindow();
	winName = cv::String(DEFAULT_MAT_WINDOW_NAME) + "-" + item.szDevName;
	_setDevName(item.szDevName);
	m_dwErrCode = ERROR_SUCCESS;
	//SetWinShown(m_hideMode != 0 ? false : true);
	if(fPreview && !StartPreview()) {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM)("StartPreview failed");
		return true;
	}else if(fPreview && bHide) {
		SetWinShown(false);
	}
	return true;
}

int CDocScannerCap::MatResize(const cv::Mat& src, cv::Mat& dest, int quantity)
{
	const int aim_size = 1*1024*1024;
	std::vector<int> params;
	params.push_back(cv::IMWRITE_JPEG_QUALITY);
	params.push_back(quantity);
	std::vector<unsigned char> buff;
	cv::imencode(".jpg", src, buff, params);
	DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("after buffer: size: %d, with quantity: %d", buff.size(), quantity);
	dest = cv::imdecode(buff, CV_LOAD_IMAGE_COLOR);
	if(buff.size() > aim_size)
		return (int)(aim_size * 1.2f / buff.size() * 100);
	return 0;
}

DWORD CDocScannerCap::GetFileSize(LPCTSTR srcFilePath)
{
	FILE* fHandle = fopen(srcFilePath, "rb");
	if(!fHandle)
		return -1;
	fseek(fHandle, 0, SEEK_END);
	DWORD fileSize = ftell(fHandle);
	DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("get the file size: %lu", fileSize);
	fclose(fHandle);
	return fileSize;
}

int CDocScannerCap::ImageWriteUntil(LPCTSTR srcFilePath, const cv::Mat& src)
{
	const int aim_size = 1*1024*1024;
	int compatRates[] = {95, 90, 85, 80, 70, 60, 50, 40, 30, 20, 15};
	for(int i=0; i<sizeof(compatRates)/sizeof(compatRates[0]); ++i)
	{
		const int compatRate = compatRates[i];
		DbgWithLink(LOG_LEVEL_DEBUG, LOG_TYPE_SYSTEM)("set compress rate: %d", compatRate);
		vector<int> comprressionParams;
		comprressionParams.push_back(CV_IMWRITE_JPEG_QUALITY);
		comprressionParams.push_back(compatRate);
		try 
		{
			imwrite(srcFilePath, src, comprressionParams);

		} catch(cv::Exception& ex)
		{
			DbgWithLink(LOG_LEVEL_ERROR, LOG_TYPE_SYSTEM)("exception converting image to jpeg: %s", ex.what());
			return -1;
		}

		Sleep(50);
		const auto fileSize = GetFileSize(srcFilePath);
		if(fileSize == (DWORD)-1)
			return -1;
		if(fileSize <= aim_size)
			return 0;
	}

	return 1;
}

int CDocScannerCap::Resize(LPCTSTR srcFilePath, DWORD dwSrcFileSize, int compressRate)
{
	const int aim_size = 1*1024*1024;
	if(dwSrcFileSize == -1 || aim_size >= dwSrcFileSize)
		return 0;
	cv::Mat src = cv::imread(srcFilePath);
	if(src.empty())
		return -1;
	float rate = sqrt(aim_size * 1.0f / dwSrcFileSize);
	int width = static_cast<int>(src.cols*rate);
	int height = static_cast<int>(src.rows*rate);

	cv::Mat dest;
	resize(src, dest, cv::Size(width, height));

	vector<int> comprressionParams;
	comprressionParams.push_back(CV_IMWRITE_JPEG_QUALITY);
	comprressionParams.push_back(compressRate);

	imwrite(srcFilePath, dest, comprressionParams);

	FILE* fHandle = fopen(srcFilePath, "rb");
	fseek(fHandle, 0, SEEK_END);
	long fileSize = ftell(fHandle);
	fclose(fHandle);
	return 1;
}

LRESULT CALLBACK CameraNotifierProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	if (message == WM_DEVICECHANGE) {
		if (DBT_DEVICEARRIVAL != wParam && DBT_DEVICEREMOVECOMPLETE != wParam) {
			return TRUE;
		}
		PDEV_BROADCAST_HDR pdbh = (PDEV_BROADCAST_HDR)lParam;
		if (pdbh->dbch_devicetype != DBT_DEVTYP_DEVICEINTERFACE) {
			return TRUE;
		}
		PDEV_BROADCAST_DEVICEINTERFACE pdbi = (PDEV_BROADCAST_DEVICEINTERFACE)lParam;
		if (pdbi->dbcc_classguid == AM_KSCATEGORY_VIDEO) {
			if (DBT_DEVICEARRIVAL == wParam) {
				printf("receive AM_KSCATEGORY_VIDEO change  add \n");
			} else if (DBT_DEVICEREMOVECOMPLETE == wParam) {
				printf("receive AM_KSCATEGORY_VIDEO change  remove \n");
			}
		}
		return TRUE;
	}

	return DefWindowProc(hWnd, message, wParam, lParam);
}


void OnMouseTrace(int event, int x, int y, int flags, void* param /*= NULL*/)
{
	CDocScannerCap* pCap = reinterpret_cast<CDocScannerCap*>(param);
	if(pCap == NULL) {
		return;
	}
	pCap->MouseClick(event, x, y, flags);
}