HRESULT tTVPMFPlayer::AddBranchToPartialTopology( IMFTopology *pTopology, IMFMediaSource *pSource, IMFPresentationDescriptor *pPD, DWORD iStream, HWND hVideoWnd ) {
CComPtr<IMFStreamDescriptor> pSD;
HRESULT hr;
BOOL selected = FALSE;
if( FAILED(hr = pPD->GetStreamDescriptorByIndex(iStream, &selected, &pSD)) ) {
TVPThrowExceptionMessage(L"Faild to get stream desc.");
}
if( selected ) {
// Create the media sink activation object.
CComPtr<IMFActivate> pSinkActivate;
if( FAILED(hr = CreateMediaSinkActivate(pSD, hVideoWnd, &pSinkActivate)) ) {
return S_OK; // video と audio 以外は無視
}
// Add a source node for this stream.
CComPtr<IMFTopologyNode> pSourceNode;
if( FAILED(hr = AddSourceNode(pTopology, pSource, pPD, pSD, &pSourceNode) ) ) {
TVPThrowExceptionMessage(L"Faild to add source node.");
}
// Create the output node for the renderer.
CComPtr<IMFTopologyNode> pOutputNode;
if( FAILED(hr = AddOutputNode(pTopology, pSinkActivate, 0, &pOutputNode)) ) {
TVPThrowExceptionMessage(L"Faild to add output node.");
}
// Connect the source node to the output node.
if( FAILED(hr = pSourceNode->ConnectOutput(0, pOutputNode, 0)) ) {
TVPThrowExceptionMessage(L"Faild to connect node.");
}
}
return hr;
}
void AddBranchToPartialTopology(
IMFTopologyPtr pTopology, // Topology.
IMFMediaSourcePtr pSource, // Media source.
IMFPresentationDescriptorPtr pPD, // Presentation descriptor.
DWORD iStream, // Stream index.
HWND hVideoWnd) // Window for video playback.
{
IMFStreamDescriptorPtr pSD;
IMFActivatePtr pSinkActivate;
IMFTopologyNodePtr pSourceNode;
IMFTopologyNodePtr pOutputNode;
BOOL fSelected = FALSE;
THROW_IF_ERR(pPD->GetStreamDescriptorByIndex(iStream, &fSelected, &pSD));
if (fSelected)
{
// Create the media sink activation object.
pSinkActivate = CreateMediaSinkActivate(pSD.Get(), hVideoWnd);
// Add a source node for this stream.
pSourceNode = AddSourceNode(pTopology, pSource, pPD, pSD);
// Create the output node for the renderer.
pOutputNode = AddOutputNode(pTopology, pSinkActivate, 0);
// Connect the source node to the output node.
THROW_IF_ERR(pSourceNode->ConnectOutput(0, pOutputNode.Get(), 0));
}
// else: If not selected, don't add the branch.
}
