コード例 #1
0
        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);
        }
コード例 #2
0
        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);
        }