void DSManager::initCaptureDevices()
{
HRESULT ret = 0;
VARIANT name;
ICreateDevEnum* devEnum = NULL;
IEnumMoniker* monikerEnum = NULL;
IMoniker* moniker = NULL;
if(m_devices.size() > 0)
{
/* clean up our list in case of reinitialization */
for(std::list<DSCaptureDevice*>::iterator it = m_devices.begin() ; it != m_devices.end() ; ++it)
{
delete *it;
}
m_devices.clear();
}
/* get the available devices list */
ret = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER,
IID_ICreateDevEnum, (void**)&devEnum);
if(FAILED(ret))
{
return;
}
ret = devEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory,
&monikerEnum, 0);
/* error or no devices */
if(FAILED(ret) || ret == S_FALSE)
{
devEnum->Release();
return;
}
/* loop and initialize all available capture devices */
while(monikerEnum->Next(1, &moniker, 0) == S_OK)
{
DSCaptureDevice* captureDevice = NULL;
IPropertyBag* propertyBag = NULL;
{
IBaseFilter* cp = NULL;
if(!FAILED(moniker->BindToObject(0, 0, IID_IBaseFilter, (void**)&cp)))
{
IAMVfwCaptureDialogs* vfw = NULL;
if(!FAILED(
cp->QueryInterface(IID_IAMVfwCaptureDialogs, (void**)&vfw)))
{
if(vfw)
{
vfw->Release();
cp->Release();
continue;
}
}
}
}
/* get properties of the device */
ret = moniker->BindToStorage(0, 0, IID_IPropertyBag, (void**)&propertyBag);
if(!FAILED(ret))
{
VariantInit(&name);
ret = propertyBag->Read(L"FriendlyName", &name, 0);
if(FAILED(ret))
{
VariantClear(&name);
propertyBag->Release();
moniker->Release();
continue;
}
/* create a new capture device */
captureDevice = new DSCaptureDevice(name.bstrVal);
/* wprintf(L"%ws\n", name.bstrVal); */
if(captureDevice && captureDevice->initDevice(moniker))
{
/* initialization success, add to the list */
m_devices.push_back(captureDevice);
}
else
{
/* printf("failed to initialize device\n"); */
delete captureDevice;
}
/* clean up */
VariantClear(&name);
propertyBag->Release();
}
moniker->Release();
}
/* cleanup */
monikerEnum->Release();
devEnum->Release();
}
