HRESULT WalkTreeFromPart(
IPart *pPart,
EDataFlow eDirection,
bool bFollowConnector,
int iTabLevel /* = 0 */
) {
HRESULT hr = S_OK;
UINT nId = 0;
hr = pPart->GetLocalId(&nId);
if (FAILED(hr)) {
LOG(L"Could not get part id: hr = 0x%08x", hr);
return hr;
}
LPWSTR pwszPartName = NULL;
hr = pPart->GetName(&pwszPartName);
if (FAILED(hr)) {
LOG(L"Could not get part name: hr = 0x%08x", hr);
return hr;
}
CoTaskMemFreeOnExit freeName(pwszPartName);
Tab(iTabLevel);
LOG(L"0x%x: %s", nId, pwszPartName);
// see if this is a volume node part
IAudioVolumeLevel *pVolume = NULL;
hr = pPart->Activate(CLSCTX_ALL, __uuidof(IAudioVolumeLevel), (void**)&pVolume);
if (E_NOINTERFACE == hr) {
// not a volume node
} else if (FAILED(hr)) {
LOG(L"Unexpected failure trying to activate IAudioVolumeLevel: hr = 0x%08x", hr);
return hr;
} else {
// it's a volume node...
ReleaseOnExit releaseVolume(pVolume);
hr = DisplayVolume(pVolume, iTabLevel);
if (FAILED(hr)) {
LOG(L"DisplayVolume failed: hr = 0x%08x", hr);
return hr;
}
}
// see if this is a mute node part
IAudioMute *pMute = NULL;
hr = pPart->Activate(CLSCTX_ALL, __uuidof(IAudioMute), (void**)&pMute);
if (E_NOINTERFACE == hr) {
// not a mute node
} else if (FAILED(hr)) {
LOG(L"Unexpected failure trying to activate IAudioMute: hr = 0x%08x", hr);
return hr;
} else {
// it's a mute node...
ReleaseOnExit releaseMute(pMute);
hr = DisplayMute(pMute, iTabLevel);
if (FAILED(hr)) {
LOG(L"DisplayMute failed: hr = 0x%08x", hr);
return hr;
}
}
// see if this is a jack description part
IKsJackDescription *pKsJackDescription = NULL;
hr = pPart->Activate(CLSCTX_ALL, __uuidof(IKsJackDescription), (void**)&pKsJackDescription);
if (E_NOINTERFACE == hr) {
// not a jack description part
} else if (FAILED(hr)) {
LOG(L"Unexpected failure trying to activate IKsJackDescription: hr = 0x%08x", hr);
return hr;
} else {
// it's a mute node...
ReleaseOnExit releaseJackDescription(pKsJackDescription);
hr = DisplayKsJackDescription(pKsJackDescription, iTabLevel);
if (FAILED(hr)) {
LOG(L"DisplayKsJackDescription failed: hr = 0x%08x", hr);
return hr;
}
}
// get the list of incoming or outgoing parts, according to the direction
IPartsList *pParts = NULL;
hr = (
eRender == eDirection ?
pPart->EnumPartsIncoming(&pParts) :
pPart->EnumPartsOutgoing(&pParts)
);
if (E_NOTFOUND == hr) {
// not an error... we've just reached the end of the path
} else if (FAILED(hr)) {
LOG(L"Couldn't enum next parts: hr = 0x%08x", hr);
return hr;
} else {
ReleaseOnExit releaseOnExit(pParts);
UINT nParts = 0;
hr = pParts->GetCount(&nParts);
if (FAILED(hr)) {
LOG(L"Couldn't get count of incoming parts: hr = 0x%08x", hr);
return hr;
}
// walk the tree on each incoming/outgoing part recursively
for (UINT n = 0; n < nParts; n++) {
IPart *pNextPart = NULL;
hr = pParts->GetPart(n, &pNextPart);
if (FAILED(hr)) {
LOG(L"Couldn't get part #%u (0-based) of %u (1-based:) hr = 0x%08x", n, nParts, hr);
return hr;
}
ReleaseOnExit releaseNextPart(pNextPart);
// if the incoming/outgoing part is a connector, follow it
hr = WalkTreeFromPart(pNextPart, eDirection, true, iTabLevel + 1);
if (FAILED(hr)) {
LOG(L"Couldn't walk tree on part #%u (0-based) of %u (1-based:) hr = 0x%08x", n, nParts, hr);
return hr;
}
}
}
if (bFollowConnector) {
// if this part is a connector, do the connector dance
IConnector *pConnHere = NULL;
hr = pPart->QueryInterface(IID_PPV_ARGS(&pConnHere));
if (E_NOINTERFACE == hr) {
// that's fine
} else if (FAILED(hr)) {
LOG(L"Unexpected failure getting the connector on the endpoint: hr = 0x%08x", hr);
return hr;
} else {
ReleaseOnExit releaseConnHere(pConnHere);
// get the connector on the other side
IConnector *pConnOtherSide = NULL;
hr = pConnHere->GetConnectedTo(&pConnOtherSide);
if (E_NOTFOUND == hr) {
// that's fine, it just isn't connected to anything
} else if (FAILED(hr)) {
LOG(L"Couldn't get the connector on the upstream device: hr = 0x%08x", hr);
return __LINE__;
} else {
ReleaseOnExit releaseConnOtherSide(pConnOtherSide);
// QI on the device's connector for IPart
IPart *pPartOtherSide = NULL;
hr = pConnOtherSide->QueryInterface(IID_PPV_ARGS(&pPartOtherSide));
if (FAILED(hr)) {
LOG(L"Couldn't get the part on the other side: hr = 0x%08x", hr);
return __LINE__;
}
ReleaseOnExit releasePartOtherSide(pPartOtherSide);
// get the device topology interface for the other side
IDeviceTopology *pDTOtherSide = NULL;
hr = pPartOtherSide->GetTopologyObject(&pDTOtherSide);
if (FAILED(hr)) {
LOG(L"Couldn't get the other side's device topology: hr = 0x%08x", hr);
return __LINE__;
}
ReleaseOnExit releaseDTOtherSide(pDTOtherSide);
// get the device name for the other side
LPWSTR pwszDeviceName = NULL;
hr = pDTOtherSide->GetDeviceId(&pwszDeviceName);
if (FAILED(hr)) {
LOG(L"Could not get device name: hr = 0x%08x", hr);
return hr;
}
CoTaskMemFreeOnExit freeDeviceName(pwszDeviceName);
Tab(iTabLevel);
LOG(L"%s", pwszDeviceName);
// walk the other side's tree
// but don't follow the connector back to here
hr = WalkTreeFromPart(pPartOtherSide, eDirection, false, iTabLevel + 1);
if (FAILED(hr)) {
LOG(L"Couldn't walk the tree: hr = 0x%08x", hr);
return __LINE__;
}
}
}
}
return S_OK;
}
int _tmain(int argc, _TCHAR* argv[])
{
try
{
require( argc == 3, USAGE );
require( fileExists( argv[1] ), "File not found" );
require( fileExists( argv[2] ), "File not found" );
TCOMIXMLDOMDocument3 xml = Msxml2_tlb::CoDOMDocument60::Create();
TCOMIXMLDOMDocument3 xsl = Msxml2_tlb::CoDOMDocument60::Create();
xsl->resolveExternals = VARIANT_TRUE;
load( xml, argv[1] );
load( xsl, argv[2] );
BSTR result = NULL;
Msxml2_tlb::IXMLDOMNodePtr pXSLDOM = xsl->documentElement;
HRESULT hr = xml->transformNode( pXSLDOM, &result );
if (FAILED(hr))
{
WideString errMsg = L"Failure code obtained from transformNode. ";
// Try to get extended error info...
IErrorInfo* errorInfo = NULL;
if ( SUCCEEDED( GetErrorInfo( 0, &errorInfo ) ) )
{
boost::shared_ptr<void> releaseOnExit( errorInfo, release );
BSTR reason = NULL;
if ( SUCCEEDED( errorInfo->GetDescription( &reason ) ) )
{
boost::shared_ptr<void> freeStringOnExit( reason, freeString );
if ( reason )
{
errMsg += WideString(reason);
}
}
}
throw Exception( UnicodeString( errMsg ) );
}
boost::shared_ptr<void> freeStringOnExit( result, freeString );
WideString ws(result);
std::wcout << (wchar_t*)ws;
return 0;
}
catch( Exception& e )
{
printError( e.Message );
}
catch( const std::exception& e )
{
printError( e.what() );
}
catch( ... )
{
printError( "Unspecified exception" );
}
return 1;
}
