Hi, Dale:
Look at the Examples section of the SDK, under "Listing all Devices"; I
think that's what you're looking for.
I don't have a "nice" code snippet, but I have some C++ code that works,
and populates 2 CComboBoxes (1 for audio & 1 for video) and initializes
them to the DV device, if present. It's part of a CDialog class, and
uses various member variables, etc, so it won't just compile & run, and
you'll have to figure out what the various parameters are, but it might
give you an idea. It also uses a template function, because you need to
iterate through two essentially identical classes -- one that's for
internal sources, and one that's for external DV devices. The code
follows below; I hope it helps.
Paul
--
//Template function to do same thing with both Digital Video srcs &
//internal sources
template<class IWMEncPluginInfoManager> HRESULT
getSources(IWMEncPluginInfoManager * pPluginInfoManager, CComboBox *
pCBSrcsVideo, CComboBox * pCBSrcsAudio, char devType)
{
HRESULT hr = 0;
int i;
int j;
int index;
long lCount;
long lResrcCount;
CComBSTR sScheme;
CComBSTR sName;
CString cString;
CString csTest, cMediaType;
VARIANT_BOOL bResources;
CString cType []={"BAD VALUE", "Source", "Transform", "Device
Control"};
CString csMediaType[]={"Media value out of range", "Audio",
WMENC_PLUGIN_TYPE enumType;//Device, Source, etc.
WMENC_SOURCE_TYPE enumSrceType; //Audio, Video, etc
char * dt = "BAD VALUE";
if (devType == 'D') dt = "DEVICECONTROL";
if (devType == 'S') dt = "DEVICE";
IWMEncPluginInfo* pPlugInfo;
hr = pPluginInfoManager->get_Count(&lCount);
for (i = 0; i < lCount; i++)
{
// Set the IWMEncPluginInfo object to the current plug-in.
if ( SUCCEEDED( hr ) )
{
hr = pPluginInfoManager->Item(i, &pPlugInfo);
}
// Get the plugin type.
pPlugInfo->get_PluginType(&enumType);
// Get the media type (audio, video, etc)
pPlugInfo->get_MediaType(&enumSrceType);
// Find the plug-ins that support resources.
if ( SUCCEEDED( hr ) )
{
hr = pPlugInfo->get_SchemeType(&sScheme);
}
if (_wcsicmp(sScheme, CComBSTR(dt))==0)
{
// Find the devices.
if ( SUCCEEDED( hr ) )
{
hr = pPlugInfo->get_Resources(&bResources);
}
if ((bResources==VARIANT_TRUE) || devType == 'D')
{
// Loop through the resources in the current plug-in.
if ( SUCCEEDED( hr) || devType == 'D' )
{
hr = pPlugInfo->get_Count(&lResrcCount);
}
for (j = 0; j < lResrcCount; j++)
{
// Display the name of the plug-in.
if ( SUCCEEDED( hr ) )
{
hr = pPlugInfo->Item(j, &sName);
cString = sName;
cMediaType.Format("MediaType: <%d> ", enumSrceType);
csTest.Format(" Enum Media Type is: <%d> ",enumSrceType);
if (enumSrceType & 1)
{
cMediaType=" Audio ";
index=pCBSrcsAudio->AddString(cType[enumType] + " " +csTest+
cMediaType + "//"+cString);
pCBSrcsAudio->SetItemDataPtr( index, (void*)pPlugInfo );
if (pCBSrcsAudio->GetCount()==1)
pCBSrcsAudio->SetCurSel(0);
if (devType=='D') //It's a DV device; make
default
pCBSrcsAudio->SetCurSel(index);
}
if (enumSrceType & 2)
{
cMediaType=" Video ";
index=pCBSrcsVideo->AddString(cType[enumType] + " " +csTest+
cMediaType + "//"+cString);
pCBSrcsVideo->SetItemDataPtr( index, (void*)pPlugInfo );
if (pCBSrcsVideo->GetCount()==1)
pCBSrcsVideo->SetCurSel(0);
if (devType=='D') //It's a DV device; make
default
pCBSrcsVideo->SetCurSel(index);
}
}
//wprintf(CComBSTR("%s\n"), sName);
}
}
}
}
return hr;
}
----------------------
//Get the list of input devices and fill the combo boxes.
int COneClickApp1Dlg::m_PopulateListDevices()
{
IWMEncSourcePluginInfoManager* pSrcPlugMgr;
IWMEncDeviceControlPluginInfoManager* pDCPlugMgr;
// IWMEncPluginInfo* pPlugInfo;
//Clear out the combo-boxes:
mp_comboAudioDevices->ResetContent( );
mp_comboVideoDevices->ResetContent( );
// Retrieve source and device plug-in info manager objects from
IWMEncoder.
if ( SUCCEEDED( hr ) )
{
hr = pEncoder->get_SourcePluginInfoManager(&pSrcPlugMgr);
}
if ( SUCCEEDED( hr ) )
{
hr = pEncoder->get_DeviceControlPluginInfoManager(&pDCPlugMgr);
}
getSources (pSrcPlugMgr, mp_comboVideoDevices,
mp_comboAudioDevices, 'S');
getSources (pDCPlugMgr, mp_comboVideoDevices,mp_comboAudioDevices,
'D');
return 1;
}