HRESULT WIACamera::GetDeviceProperty(const unsigned int CamID, const PropertyType Type, int *piValue)
{
HRESULT hr = S_OK;
if ( CamID >= m_iCount ) return S_FALSE;
IWiaPropertyStorage *pWiaPropertyStorage;
hr = m_vRootItem[CamID]->QueryInterface(IID_IWiaPropertyStorage,(void**)&pWiaPropertyStorage);
if (hr != S_OK) {
return E_NOINTERFACE;
}
PROPSPEC PropSpec;
PROPVARIANT PropVar;
PropSpec.ulKind = PRSPEC_PROPID;
if ( Type==CAMERA_SHUTTERSPEED ) {
PropSpec.propid = WIA_DPC_EXPOSURE_TIME;
hr = pWiaPropertyStorage->ReadMultiple( 1, &PropSpec, &PropVar );
} else if ( Type==CAMERA_GAIN ) {
PropSpec.propid = WIA_DPC_EXPOSURE_INDEX;
hr = pWiaPropertyStorage->ReadMultiple( 1, &PropSpec, &PropVar );
} else if ( Type==CAMERA_APERTURE ) {
PropSpec.propid = WIA_DPC_FNUMBER;
hr = pWiaPropertyStorage->ReadMultiple( 1, &PropSpec, &PropVar );
} else {
hr = E_NOTIMPL;
}
if (pWiaPropertyStorage) {
pWiaPropertyStorage->Release();
pWiaPropertyStorage = NULL;
}
if (hr == S_OK) {
*piValue = (int)PropVar.lVal;
}
return hr;
}
//This function enumerates WIA devices and then creates an instance of each device.
//After that it calls EnumerateAndDownloadItems() on the root item got from creation of device.
HRESULT EnumerateWiaDevices( IWiaDevMgr2 *pWiaDevMgr2 )
{
// Validate arguments
if (NULL == pWiaDevMgr2)
{
HRESULT hr = E_INVALIDARG;
ReportError(TEXT("Invalid argument passed to EnumerateWiaDevices()"),hr);
return hr;
}
// Get a device enumerator interface
IEnumWIA_DEV_INFO *pWiaEnumDevInfo = NULL;
HRESULT hr = pWiaDevMgr2->EnumDeviceInfo( WIA_DEVINFO_ENUM_LOCAL, &pWiaEnumDevInfo );
if (SUCCEEDED(hr))
{
// Reset the device enumerator to the beginning of the list
hr = pWiaEnumDevInfo->Reset();
if (SUCCEEDED(hr))
{
// We will loop until we get an error or pWiaEnumDevInfo->Next returns
// S_FALSE to signal the end of the list.
while (S_OK == hr)
{
// Get the next device's property storage interface pointer
IWiaPropertyStorage *pWiaPropertyStorage = NULL;
hr = pWiaEnumDevInfo->Next( 1, &pWiaPropertyStorage, NULL );
// pWiaEnumDevInfo->Next will return S_FALSE when the list is
// exhausted, so check for S_OK before using the returned
// value.
if (hr == S_OK)
{
// Read some device properties - Device ID,name and descripion and return Device ID needed for creating Device
BSTR bstrDeviceID = NULL;
HRESULT hr1 = ReadWiaPropsAndGetDeviceID( pWiaPropertyStorage ,&bstrDeviceID);
if(SUCCEEDED(hr1))
{
// Call a function to create the device using device ID
IWiaItem2 *pWiaRootItem2 = NULL;
hr1 = pWiaDevMgr2->CreateDevice( 0, bstrDeviceID, &pWiaRootItem2 );
if(SUCCEEDED(hr1))
{
// Enumerate items and for each item do transfer
hr1 = EnumerateAndDownloadItems( pWiaRootItem2 );
if(FAILED(hr1))
{
ReportError(TEXT("EnumerateAndDownloadItems() failed in EnumerateWiaDevices()"),hr1);
}
//Release pWiaRootItem2
pWiaRootItem2->Release();
pWiaRootItem2 = NULL;
}
else
{
ReportError(TEXT("Error calling IWiaDevMgr2::CreateDevice()"),hr1);
}
}
else
{
ReportError(TEXT("ReadWiaPropsAndGetDeviceID() failed in EnumerateWiaDevices()"),hr1);
}
// Release the device's IWiaPropertyStorage*
pWiaPropertyStorage->Release();
pWiaPropertyStorage = NULL;
}
else if (FAILED(hr))
{
// Report that an error occurred during enumeration
ReportError( TEXT("Error calling IEnumWIA_DEV_INFO::Next()"), hr );
}
}
//
// If the result of the enumeration is S_FALSE, since this
// is normal, we will change it to S_OK.
//
if (S_FALSE == hr)
{
hr = S_OK;
}
}
else
{
// Report that an error occurred calling Reset()
ReportError( TEXT("Error calling IEnumWIA_DEV_INFO::Reset()"), hr );
}
// Release the enumerator
pWiaEnumDevInfo->Release();
pWiaEnumDevInfo = NULL;
}
else
{
// Report that an error occurred trying to create the enumerator
ReportError( TEXT("Error calling IWiaDevMgr2::EnumDeviceInfo"), hr );
}
// Return the result of the enumeration
return hr;
}
// This function downloads item after setting the format for the item and initializing callback (depending on category,itemtype)
// with the directory to download images to as well as the filename for the downloaded image.
HRESULT DownloadItem(IWiaItem2* pWiaItem2)
{
if( (!pWiaItem2) )
{
HRESULT hr = E_INVALIDARG;
ReportError(TEXT("Invalid argument passed to DownloadItem()"),hr);
return hr;
}
// Get the IWiaTransfer interface
IWiaTransfer *pWiaTransfer = NULL;
HRESULT hr = pWiaItem2->QueryInterface( IID_IWiaTransfer, (void**)&pWiaTransfer );
if (SUCCEEDED(hr))
{
// Create our callback class
CWiaTransferCallback *pWiaClassCallback = new CWiaTransferCallback;
if (pWiaClassCallback)
{
// Get the IWiaTransferCallback interface from our callback class.
IWiaTransferCallback *pWiaTransferCallback = NULL;
hr = pWiaClassCallback->QueryInterface( IID_IWiaTransferCallback, (void**)&pWiaTransferCallback );
if (SUCCEEDED(hr))
{
//Set the format for the item to BMP
IWiaPropertyStorage* pWiaPropertyStorage = NULL;
HRESULT hr = pWiaItem2->QueryInterface( IID_IWiaPropertyStorage, (void**)&pWiaPropertyStorage );
if(SUCCEEDED(hr))
{
hr = WritePropertyGuid(pWiaPropertyStorage,WIA_IPA_FORMAT,WiaImgFmt_BMP);
if(FAILED(hr))
{
ReportError(TEXT("WritePropertyGuid() failed in DownloadItem().Format couldn't be set to BMP"),hr);
}
//Get the file extension and initialize callback with this extension and directory in which to transfer image
//along with feeder flag.
//This will result in m_szFileName member callback class being set on which GetNextStream() will create and return a stream
BSTR bstrFileExtension = NULL;
ReadPropertyBSTR(pWiaPropertyStorage,WIA_IPA_FILENAME_EXTENSION, &bstrFileExtension);
//Get the temporary folder path which is the directory where we will download the images
TCHAR bufferTempPath[MAX_TEMP_PATH];
GetTempPath(MAX_TEMP_PATH , bufferTempPath);
// Find out item type
GUID itemCategory = GUID_NULL;
ReadPropertyGuid(pWiaItem2,WIA_IPA_ITEM_CATEGORY,&itemCategory );
BOOL bFeederTransfer = FALSE;
if(IsEqualGUID(itemCategory,WIA_CATEGORY_FEEDER))
{
//Set WIA_IPS_PAGES to ALL_PAGES will enable transfer of all pages in the document feeder (multi-page transfer).
//If somebody wants to scan a specific number of pages say N, he should set WIA_IPS_PAGES to N.
WritePropertyLong(pWiaPropertyStorage,WIA_IPS_PAGES,ALL_PAGES);
bFeederTransfer = TRUE;
}
//Initialize the callback class with the directory, file extension and feeder flag
pWiaClassCallback->InitializeCallback(bufferTempPath,bstrFileExtension,bFeederTransfer);
//Now download file item
hr = pWiaTransfer->Download(0,pWiaTransferCallback);
if(S_OK == hr)
{
_tprintf(TEXT("\npWiaTransfer->Download() on file item SUCCEEDED"));
}
else if(S_FALSE == hr)
{
ReportError(TEXT("pWiaTransfer->Download() on file item returned S_FALSE. File may be empty"),hr);
}
else if(FAILED(hr))
{
ReportError(TEXT("pWiaTransfer->Download() on file item failed"),hr);
}
//Release pWiaPropertyStorage interface
pWiaPropertyStorage->Release();
pWiaPropertyStorage = NULL;
}
else
{
ReportError(TEXT("QueryInterface failed on IID_IWiaPropertyStorage"),hr);
}
// Release the callback interface
pWiaTransferCallback->Release();
pWiaTransferCallback = NULL;
}
else
{
ReportError( TEXT("pWiaClassCallback->QueryInterface failed on IID_IWiaTransferCallback"), hr );
}
// Release our callback. It should now delete itself.
pWiaClassCallback->Release();
pWiaClassCallback = NULL;
}
else
{
ReportError( TEXT("Unable to create CWiaTransferCallback class instance") );
}
// Release the IWiaTransfer
pWiaTransfer->Release();
pWiaTransfer = NULL;
}
else
{
ReportError( TEXT("pIWiaItem2->QueryInterface failed on IID_IWiaTransfer"), hr );
}
return hr;
}
HRESULT EnumerateWiaDevices( IWiaDevMgr *pWiaDevMgr )
{
//
// Validate arguments
//
if (NULL == pWiaDevMgr)
{
return E_INVALIDARG;
}
//
// Get a device enumerator interface
//
IEnumWIA_DEV_INFO *pWiaEnumDevInfo = NULL;
HRESULT hr = pWiaDevMgr->EnumDeviceInfo( WIA_DEVINFO_ENUM_LOCAL, &pWiaEnumDevInfo );
if (SUCCEEDED(hr))
{
//
// Reset the device enumerator to the beginning of the list
//
hr = pWiaEnumDevInfo->Reset();
if (SUCCEEDED(hr))
{
//
// We will loop until we get an error or pWiaEnumDevInfo->Next returns
// S_FALSE to signal the end of the list.
//
while (S_OK == hr)
{
//
// Get the next device's property storage interface pointer
//
IWiaPropertyStorage *pWiaPropertyStorage = NULL;
hr = pWiaEnumDevInfo->Next( 1, &pWiaPropertyStorage, NULL );
//
// pWiaEnumDevInfo->Next will return S_FALSE when the list is
// exhausted, so check for S_OK before using the returned
// value.
//
if (hr == S_OK)
{
//
// Do something with the device's IWiaPropertyStorage*
//
ReadSomeWiaProperties( pWiaPropertyStorage );
//
// Call a helper function to create the device
// and do some stuff with it.
//
CreateWiaDeviceAndDoSomeStuff( pWiaDevMgr, pWiaPropertyStorage );
//
// Release the device's IWiaPropertyStorage*
//
pWiaPropertyStorage->Release();
pWiaPropertyStorage = NULL;
}
else if (FAILED(hr))
{
//
// Report that an error occurred during enumeration
//
ReportError( TEXT("Error calling pWiaEnumDevInfo->Next"), hr );
}
}
//
// If the result of the enumeration is S_FALSE, since this
// is normal, we will change it to S_OK.
//
if (S_FALSE == hr)
{
hr = S_OK;
}
}
else
{
//
// Report that an error occurred calling Reset()
//
ReportError( TEXT("Error calling IEnumWIA_DEV_INFO::Reset()"), hr );
}
//
// Release the enumerator
//
pWiaEnumDevInfo->Release();
pWiaEnumDevInfo = NULL;
}
else
{
//
// Report that an error occurred trying to create the enumerator
//
ReportError( TEXT("Error calling IWiaDevMgr::EnumDeviceInfo"), hr );
}
//
// Return the result of the enumeration
//
return hr;
}
HRESULT PrintItemName( IWiaItem *pWiaItem )
{
//
// Validate arguments
//
if (NULL == pWiaItem)
{
return E_INVALIDARG;
}
//
// Get the IWiaPropertyStorage interface
//
IWiaPropertyStorage *pWiaPropertyStorage = NULL;
HRESULT hr = pWiaItem->QueryInterface( IID_IWiaPropertyStorage, (void**)&pWiaPropertyStorage );
if (SUCCEEDED(hr))
{
//
// Declare PROPSPECs and PROPVARIANTs, and initialize them to zero.
//
PROPSPEC PropSpec[1] = {0};
PROPVARIANT PropVar[1] = {0};
//
// How many properties are we querying for?
//
const ULONG c_nPropertyCount = sizeof(PropSpec)/sizeof(PropSpec[0]);
//
// Define which properties we want to read:
// Device ID. This is what we'd use to create
// the device.
//
PropSpec[0].ulKind = PRSPEC_PROPID;
PropSpec[0].propid = WIA_IPA_FULL_ITEM_NAME;
//
// Ask for the property values
//
hr = pWiaPropertyStorage->ReadMultiple( c_nPropertyCount, PropSpec, PropVar );
if (SUCCEEDED(hr))
{
//
// IWiaPropertyStorage::ReadMultiple will return S_FALSE if some
// properties could not be read, so we have to check the return
// types for each requested item.
//
//
// Check the return type for the device ID
//
if (VT_BSTR == PropVar[0].vt)
{
//
// Do something with the device ID
//
_tprintf( TEXT("Item Name: %ws\n"), PropVar[0].bstrVal );
}
//
// Free the returned PROPVARIANTs
//
FreePropVariantArray( c_nPropertyCount, PropVar );
}
else
{
ReportError( TEXT("Error calling IWiaPropertyStorage::ReadMultiple"), hr );
}
//
// Release the IWiaPropertyStorage interface
//
pWiaPropertyStorage->Release();
pWiaPropertyStorage = NULL;
}
//
// Return the result of reading the properties
//
return hr;
}
HRESULT TransferWiaItem( IWiaItem *pWiaItem )
{
//
// Validate arguments
//
if (NULL == pWiaItem)
{
return E_INVALIDARG;
}
//
// Get the IWiaPropertyStorage interface so we can set required properties
//
IWiaPropertyStorage *pWiaPropertyStorage = NULL;
HRESULT hr = pWiaItem->QueryInterface( IID_IWiaPropertyStorage, (void**)&pWiaPropertyStorage );
if (SUCCEEDED(hr))
{
//
// Prepare PROPSPECs and PROPVARIANTs for setting the
// media type and format
//
PROPSPEC PropSpec[2] = {0};
PROPVARIANT PropVariant[2] = {0};
const ULONG c_nPropCount = sizeof(PropVariant)/sizeof(PropVariant[0]);
//
// Use BMP as the output format
//
GUID guidOutputFormat = WiaImgFmt_BMP;
//
// Initialize the PROPSPECs
//
PropSpec[0].ulKind = PRSPEC_PROPID;
PropSpec[0].propid = WIA_IPA_FORMAT;
PropSpec[1].ulKind = PRSPEC_PROPID;
PropSpec[1].propid = WIA_IPA_TYMED;
//
// Initialize the PROPVARIANTs
//
PropVariant[0].vt = VT_CLSID;
PropVariant[0].puuid = &guidOutputFormat;
PropVariant[1].vt = VT_I4;
PropVariant[1].lVal = TYMED_FILE;
//
// Set the properties
//
hr = pWiaPropertyStorage->WriteMultiple( c_nPropCount, PropSpec, PropVariant, WIA_IPA_FIRST );
if (SUCCEEDED(hr))
{
//
// Get the IWiaDataTransfer interface
//
IWiaDataTransfer *pWiaDataTransfer = NULL;
hr = pWiaItem->QueryInterface( IID_IWiaDataTransfer, (void**)&pWiaDataTransfer );
if (SUCCEEDED(hr))
{
//
// Create our callback class
//
CWiaDataCallback *pCallback = new CWiaDataCallback;
if (pCallback)
{
//
// Get the IWiaDataCallback interface from our callback class.
//
IWiaDataCallback *pWiaDataCallback = NULL;
hr = pCallback->QueryInterface( IID_IWiaDataCallback, (void**)&pWiaDataCallback );
if (SUCCEEDED(hr))
{
//
// Perform the transfer using default settings
//
STGMEDIUM stgMedium = {0};
hr = pWiaDataTransfer->idtGetData( &stgMedium, pWiaDataCallback );
if (S_OK == hr)
{
//
// Print the filename (note that this filename is always
// a WCHAR string, not TCHAR.
//
_tprintf( TEXT("Transferred filename: %ws\n"), stgMedium.lpszFileName );
//
// Release any memory associated with the stgmedium
//
ReleaseStgMedium( &stgMedium );
}
else
{
ReportError( TEXT("pWiaDataTransfer->idtGetData failed"), hr );
}
//
// Release the callback interface
//
pWiaDataCallback->Release();
pWiaDataCallback = NULL;
}
else
{
ReportError( TEXT("pCallback->QueryInterface failed on IID_IWiaDataCallback"), hr );
}
//
// Release our callback. It should now delete itself.
//
pCallback->Release();
pCallback = NULL;
}
else
{
ReportError( TEXT("Unable to create CWiaDataCallback class instance") );
}
//
// Release the IWiaDataTransfer
//
pWiaDataTransfer->Release();
pWiaDataTransfer = NULL;
}
else
{
ReportError( TEXT("pWiaItem->QueryInterface failed on IID_IWiaDataTransfer"), hr );
}
}
//
// Release the IWiaPropertyStorage
//
pWiaPropertyStorage->Release();
pWiaPropertyStorage = NULL;
}
else
{
ReportError( TEXT("pWiaItem->QueryInterface failed on IID_IWiaPropertyStorage"), hr );
}
return hr;
}
HRESULT WIACamera::SetDeviceProperty(const unsigned int CamID, const PropertyType Type, const int iValue, bool bAuto)
{
HRESULT hr = S_OK;
if ( CamID >= m_iCount ) return S_FALSE;
IWiaPropertyStorage *pWiaPropertyStorage;
hr = m_vRootItem[CamID]->QueryInterface(IID_IWiaPropertyStorage,(void**)&pWiaPropertyStorage);
if (hr != S_OK) {
return E_NOINTERFACE;
}
PROPSPEC PropSpec;
PROPVARIANT PropVar;
PropSpec.ulKind = PRSPEC_PROPID;
PropVar.vt = VT_I4;
if ( Type==CAMERA_SHUTTERSPEED ) {
// shutter speed変更の際には，撮影モード変更後，値を設定
long lResult;
PropSpec.propid = WIA_DPC_EXPOSURE_MODE;
hr = ReadPropertyLong( pWiaPropertyStorage, &PropSpec, &lResult);
if (bAuto) {
// EXPOSUREMODE_MANUAL -> EXPOSUREMODE_APERTURE_PRIORITY
// EXPOSUREMODE_SHUTTER_PRIORITY -> EXPOSUREMODE_AUTO
// OTHER : NOTHING
if ( lResult==EXPOSUREMODE_MANUAL ) {
PropVar.lVal = EXPOSUREMODE_APERTURE_PRIORITY;
hr = pWiaPropertyStorage->WriteMultiple( 1, &PropSpec, &PropVar, 2 );
} else if ( lResult==EXPOSUREMODE_SHUTTER_PRIORITY ) {
PropVar.lVal = EXPOSUREMODE_AUTO;
hr = pWiaPropertyStorage->WriteMultiple( 1, &PropSpec, &PropVar, 2 );
}
} else {
// EXPOSUREMODE_MANUAL <- EXPOSUREMODE_APERTURE_PRIORITY
// EXPOSUREMODE_SHUTTER_PRIORITY <- EXPOSUREMODE_AUTO
// OTHER : NOTHING
if ( lResult==EXPOSUREMODE_APERTURE_PRIORITY ) {
PropVar.lVal = EXPOSUREMODE_MANUAL;
hr = pWiaPropertyStorage->WriteMultiple( 1, &PropSpec, &PropVar, 2 );
} else if ( lResult==EXPOSUREMODE_AUTO ) {
PropVar.lVal = EXPOSUREMODE_SHUTTER_PRIORITY;
hr = pWiaPropertyStorage->WriteMultiple( 1, &PropSpec, &PropVar, 2 );
}
// then Set Value.
PropSpec.propid = WIA_DPC_EXPOSURE_TIME;
PropVar.lVal = iValue;
hr = pWiaPropertyStorage->WriteMultiple( 1, &PropSpec, &PropVar, 2 );
}
} else if ( Type==CAMERA_APERTURE ) {
// 絞り変更の際には，撮影モード変更後，値を設定
long lResult;
PropSpec.propid = WIA_DPC_EXPOSURE_MODE;
hr = ReadPropertyLong( pWiaPropertyStorage, &PropSpec, &lResult);
if (bAuto) {
// EXPOSUREMODE_MANUAL -> EXPOSUREMODE_SHUTTER_PRIORITY
// EXPOSUREMODE_APERTURE_PRIORITY -> EXPOSUREMODE_AUTO
// OTHER : NOTHING
if ( lResult==EXPOSUREMODE_MANUAL ) {
PropVar.lVal = EXPOSUREMODE_SHUTTER_PRIORITY;
hr = pWiaPropertyStorage->WriteMultiple( 1, &PropSpec, &PropVar, 2 );
} else if ( lResult==EXPOSUREMODE_APERTURE_PRIORITY ) {
PropVar.lVal = EXPOSUREMODE_AUTO;
hr = pWiaPropertyStorage->WriteMultiple( 1, &PropSpec, &PropVar, 2 );
}
} else {
// EXPOSUREMODE_MANUAL <- EXPOSUREMODE_SHUTTER_PRIORITY
// EXPOSUREMODE_APERTURE_PRIORITY <- EXPOSUREMODE_AUTO
// OTHER : NOTHING
if ( lResult==EXPOSUREMODE_SHUTTER_PRIORITY ) {
PropVar.lVal = EXPOSUREMODE_MANUAL;
hr = pWiaPropertyStorage->WriteMultiple( 1, &PropSpec, &PropVar, 2 );
} else if ( lResult==EXPOSUREMODE_AUTO ) {
PropVar.lVal = EXPOSUREMODE_APERTURE_PRIORITY;
hr = pWiaPropertyStorage->WriteMultiple( 1, &PropSpec, &PropVar, 2 );
}
// then Set Value.
PropSpec.propid = WIA_DPC_FNUMBER;
PropVar.lVal = iValue;
hr = pWiaPropertyStorage->WriteMultiple( 1, &PropSpec, &PropVar, 2 );
}
} else if ( Type==CAMERA_GAIN ) {
PropSpec.propid = WIA_DPC_EXPOSURE_INDEX;
if (bAuto) {
PropVar.lVal = 0xFFFF;
} else {
PropVar.lVal = iValue;
}
hr = pWiaPropertyStorage->WriteMultiple( 1, &PropSpec, &PropVar, 2 );
} else {
hr = E_NOTIMPL;
}
if (pWiaPropertyStorage) {
pWiaPropertyStorage->Release();
pWiaPropertyStorage = NULL;
}
return hr;
}
HRESULT WIACamera::Initialize()
{
// CoInitialize(NULL);
CoInitializeEx(NULL, COINIT_MULTITHREADED);
IEnumWIA_DEV_INFO *pWiaEnumDevInfo = NULL;
//
// Create an instance of the device manager
//
HRESULT hr = CoCreateInstance( CLSID_WiaDevMgr, NULL, CLSCTX_LOCAL_SERVER, IID_IWiaDevMgr, (void**)&m_pWiaDevMgr );
hr = CoCreateInstance(CLSID_WiaVideo, NULL, CLSCTX_INPROC_SERVER, IID_IWiaVideo, (void**) &m_pWiaVideo);
if (SUCCEEDED(hr)) {
//
// Enumerate WIA devices on the system
//
hr = m_pWiaDevMgr->EnumDeviceInfo(WIA_DEVINFO_ENUM_LOCAL, &pWiaEnumDevInfo);
}
//
// Reset the enumeration to start at the beginning of the list.
//
if (SUCCEEDED(hr)) {
//
// Call Reset on Enumerator
//
hr = pWiaEnumDevInfo->Reset();
}
BOOL bFound = FALSE;
while ( SUCCEEDED(hr) ) {
IWiaPropertyStorage *pIWiaPropStg = NULL;
ULONG ulFetched = NULL;
//
// Get the next WIA device
//
hr = pWiaEnumDevInfo->Next(1, &pIWiaPropStg, &ulFetched);
if (hr == S_OK) {
//
// Get the device type of the device
//
PROPSPEC PropSpec[3];
PROPVARIANT PropVar[3];
memset(PropVar,0,sizeof(PropVar));
PropSpec[0].ulKind = PRSPEC_PROPID;
PropSpec[0].propid = WIA_DIP_DEV_ID;
PropSpec[1].ulKind = PRSPEC_PROPID;
PropSpec[1].propid = WIA_DIP_DEV_TYPE;
PropSpec[2].ulKind = PRSPEC_PROPID;
PropSpec[2].propid = WIA_DIP_DEV_NAME;
//
// Get the type and the ID of each device
//
hr = pIWiaPropStg->ReadMultiple(sizeof(PropSpec)/sizeof(PROPSPEC),
PropSpec, PropVar);
//
// If the device is a streaming video device/digital camera,
// get its ID
//
if (GET_STIDEVICE_TYPE(PropVar[1].lVal) == StiDeviceTypeStreamingVideo
|| GET_STIDEVICE_TYPE(PropVar[1].lVal) == StiDeviceTypeDigitalCamera) {
std::wcerr << "WIA_DIP_DEV_ID :\t" << PropVar[0].bstrVal << std::endl
<< "WIA_DIP_DEV_NAME :\t" << PropVar[2].bstrVal << std::endl;
bFound = TRUE;
const size_t BUFFER_SIZE = 1024;
char buf[BUFFER_SIZE];
_bstr_t bstrIntermediate;
bstrIntermediate.Assign(PropVar[0].bstrVal);
sprintf_s((char*)buf, BUFFER_SIZE, "%s", (LPCTSTR)bstrIntermediate);
char* strID = new char [strlen(buf)+1];
strcpy_s( strID, strlen(buf)+1, buf );
m_vCameraID.push_back(strID);
bstrIntermediate.Assign(PropVar[2].bstrVal);
sprintf_s((char*)buf, BUFFER_SIZE, "%s", (LPCTSTR)bstrIntermediate);
char* strName = new char [strlen(buf)+1];
strcpy_s( strID, strlen(buf)+1, buf );
m_vCameraName.push_back(strName);
delete [] strID;
delete [] strName;
//
// Create a WIA device and get the recommended
// images directory
//
IWiaItem *pRootItem = NULL;
hr = m_pWiaDevMgr->CreateDevice(PropVar[0].bstrVal,
&pRootItem);
if (GET_STIDEVICE_TYPE(PropVar[1].lVal) == StiDeviceTypeStreamingVideo) {
// ビデオカメラ特有の処理
m_pCaptureFunc.push_back( &WIACamera::VideoCameraCapture );
} else {
// デジタルカメラ特有の処理
m_pCaptureFunc.push_back( &WIACamera::DigitalCameraCapture );
}
if (SUCCEEDED(hr)) {
m_vRootItem.push_back(pRootItem);
} else {
m_vRootItem.push_back(NULL);
throw "Error:\n";
return hr;
}
}
} else {
break;
}
if (pIWiaPropStg) {
pIWiaPropStg->Release();
pIWiaPropStg = NULL;
}
}
if (pWiaEnumDevInfo) {
pWiaEnumDevInfo->Release();
pWiaEnumDevInfo = NULL;
}
if (!bFound)
{
//
// We did not find any WIA video streaming devices. There is nothing left
// to do. Set result to E_FAIL
//
hr = E_FAIL;
return hr;
}
m_iCount = (unsigned int)m_vRootItem.size();
//
// Return the result of creating the device manager
//
return hr;
}
HRESULT WIACamera::DigitalCameraCapture(IWiaItem* pIWiaRoot, IplImage** ppIplImage)
{
HRESULT hr = S_OK;
IWiaItem* pIWiaItem = NULL;
hr = pIWiaRoot->DeviceCommand( 0, &WIA_CMD_TAKE_PICTURE, &pIWiaItem );
if (pIWiaItem==NULL) {
cvReleaseImage(ppIplImage);
(*ppIplImage) = NULL;
return hr;
}
IStream **ppStream = NULL;
LONG lCount = 0;
// Create the data callback interface
CDataCallback *pDataCallback = new CDataCallback( &lCount,&ppStream );
if (pDataCallback == NULL) {
return E_OUTOFMEMORY;
}
{
// Get the interface pointers
IWiaPropertyStorage *pWiaPropertyStorage;
hr = pIWiaItem->QueryInterface(IID_IWiaPropertyStorage,(void**)&pWiaPropertyStorage);
if (hr != S_OK) {
return E_NOINTERFACE;
}
IWiaDataTransfer *pIWiaDataTransfer;
hr = pIWiaItem->QueryInterface(IID_IWiaDataTransfer, (void**)&pIWiaDataTransfer);
if (hr != S_OK) {
return E_NOINTERFACE;
}
// Set the transfer type
PROPSPEC specTymed;
specTymed.ulKind = PRSPEC_PROPID;
specTymed.propid = WIA_IPA_TYMED;
PROPVARIANT varTymed;
varTymed.vt = VT_I4;
varTymed.lVal = TYMED_CALLBACK;
hr = pWiaPropertyStorage->WriteMultiple(1, &specTymed, &varTymed, WIA_IPA_FIRST );
PropVariantClear(&varTymed);
if (FAILED(hr)) {
return hr;
}
// If there is no transfer format specified, use the device default
GUID guidFormat = GUID_NULL;
GUID *pguidFormat = &guidFormat;
PROPSPEC specPreferredFormat;
specPreferredFormat.ulKind = PRSPEC_PROPID;
specPreferredFormat.propid = WIA_IPA_PREFERRED_FORMAT;
hr = ReadPropertyGuid( pWiaPropertyStorage, &specPreferredFormat, pguidFormat );
if (FAILED(hr)) {
return hr;
}
// Set the transfer format
PROPSPEC specFormat;
PROPVARIANT varFormat;
specFormat.ulKind = PRSPEC_PROPID;
specFormat.propid = WIA_IPA_FORMAT;
varFormat.vt = VT_CLSID;
varFormat.puuid = (CLSID *) CoTaskMemAlloc(sizeof(CLSID));
if (varFormat.puuid == NULL) {
return E_OUTOFMEMORY;
}
*varFormat.puuid = *pguidFormat;
hr = pWiaPropertyStorage->WriteMultiple( 1, &specFormat, &varFormat, WIA_IPA_FIRST );
PropVariantClear(&varFormat);
if (FAILED(hr)) {
return hr;
}
// Read the transfer buffer size from the device, default to 64K
PROPSPEC specBufferSize;
specBufferSize.ulKind = PRSPEC_PROPID;
specBufferSize.propid = WIA_IPA_BUFFER_SIZE;
LONG nBufferSize;
hr = ReadPropertyLong( pWiaPropertyStorage, &specBufferSize, &nBufferSize );
if (FAILED(hr)) {
nBufferSize = 64 * 1024;
}
// Choose double buffered transfer for better performance
WIA_DATA_TRANSFER_INFO WiaDataTransferInfo = { 0 };
WiaDataTransferInfo.ulSize = sizeof(WIA_DATA_TRANSFER_INFO);
WiaDataTransferInfo.ulBufferSize = 2 * nBufferSize;
WiaDataTransferInfo.bDoubleBuffer = TRUE;
// Start the transfer
hr = pIWiaDataTransfer->idtGetBandedData( &WiaDataTransferInfo, pDataCallback );
if (pWiaPropertyStorage) {
pWiaPropertyStorage->Release();
pWiaPropertyStorage = NULL;
}
if (pIWiaDataTransfer) {
pIWiaDataTransfer->Release();
pIWiaDataTransfer = NULL;
}
}
if (pIWiaItem) {
// Delete file from DigitalCamera storage
pIWiaItem->DeleteItem(0);
pIWiaItem->Release();
pIWiaItem = NULL;
}
if (lCount!=1) throw "Error.\n";
if ( SUCCEEDED(hr) ) {
Gdiplus::Bitmap myBmp(ppStream[0]);
int Width = myBmp.GetWidth();
int Height = myBmp.GetHeight();
Gdiplus::Rect rect(0, 0, Width, Height);
Gdiplus::BitmapData myBitmapData;
Gdiplus::Status res =
myBmp.LockBits(
&rect, Gdiplus::ImageLockModeRead,
PixelFormat24bppRGB, &myBitmapData
);
if ( (*ppIplImage)==NULL ) {
(*ppIplImage) = cvCreateImage(cvSize(Width,Height),IPL_DEPTH_8U,3);
} else {
CvSize oldSize = cvGetSize((*ppIplImage));
if ( oldSize.width!=Width || oldSize.height!=Height ) {
throw "Warning.\n";
cvReleaseImage(&(*ppIplImage));
(*ppIplImage) = cvCreateImage(cvSize(Width,Height),IPL_DEPTH_8U,3);
}
}
unsigned char *pIplData = (unsigned char*)(*ppIplImage)->imageData;
for ( int h=0; h < Height; h++) {
unsigned char *pIplLine = &pIplData[(*ppIplImage)->widthStep*h];
unsigned char *pBitmapLine = &((unsigned char*)myBitmapData.Scan0)[myBitmapData.Stride*h];
memcpy( pIplLine, pBitmapLine, sizeof(unsigned char)*Width*3 );
/*
for ( int w=0; w < Width; w++) {
pIplLine[w*3+0] = pBitmapLine[w*3+2];
pIplLine[w*3+1] = pBitmapLine[w*3+1];
pIplLine[w*3+2] = pBitmapLine[w*3+0];
}
*/
}
} else {
delete (*ppIplImage);
(*ppIplImage) = NULL;
}
ppStream[0]->Release();
return hr;
}