private static HResult CreateSourceStreamNode(IMFMediaSource source, IMFStreamDescriptor streamDescriptor, IMFPresentationDescriptor presentationDescriptor, out IMFTopologyNode node)
{
HResult hr = S_OK;
node = null;
hr = MF.CreateTopologyNode(MFTopologyType.SourcestreamNode, out node);
if (Failed(hr))
{
return(hr);
}
hr = node.SetUnknown(MF_TOPONODE_SOURCE, source);
if (Failed(hr))
{
SafeRelease(node);
return(hr);
}
hr = node.SetUnknown(MF_TOPONODE_PRESENTATION_DESCRIPTOR, presentationDescriptor);
if (Failed(hr))
{
SafeRelease(node);
return(hr);
}
hr = node.SetUnknown(MF_TOPONODE_STREAM_DESCRIPTOR, streamDescriptor);
if (Failed(hr))
{
SafeRelease(node);
return(hr);
}
return(hr);
}
private static HResult CreateOutputNode(IMFStreamDescriptor streamDescriptor, out IMFMediaSinkAlt mediaSink, out IMFTopologyNode node)
{
HResult hr = S_OK;
mediaSink = null;
node = null;
IMFMediaTypeHandler mediaTypeHandler = null;
IMFActivate activate = null;
IMFStreamSinkAlt streamSink = null;
Guid majorType = Guid.Empty;
int streamSinkCount = 0;
hr = streamDescriptor.GetMediaTypeHandler(out mediaTypeHandler);
if (Failed(hr))
{
return(hr);
}
hr = mediaTypeHandler.GetMajorType(out majorType);
if (Failed(hr))
{
SafeRelease(mediaTypeHandler);
return(hr);
}
hr = MF.CreateTopologyNode(MFTopologyType.OutputNode, out node);
if (Failed(hr))
{
SafeRelease(mediaTypeHandler);
return(hr);
}
if (majorType == MFMediaType.Video)
{
ExternalMediaSink extMediaSink = new ExternalMediaSink();
mediaSink = (IMFMediaSinkAlt)extMediaSink;
hr = mediaSink.GetStreamSinkCount(out streamSinkCount);
if (Failed(hr))
{
mediaSink = null;
return(hr);
}
hr = mediaSink.GetStreamSinkByIndex(0, out streamSink);
if (Failed(hr))
{
mediaSink = null;
return(hr);
}
hr = node.SetObject(streamSink);
if (Failed(hr))
{
mediaSink = null;
return(hr);
}
}
else if (majorType == MFMediaType.Audio)
{
hr = MF.CreateAudioRendererActivate(out activate);
if (Failed(hr))
{
return(hr);
}
hr = node.SetObject(activate);
if (Failed(hr))
{
return(hr);
}
}
mediaTypeHandler = null;
activate = null;
streamSink = null;
return(hr);
}
