/// <summary> Populate the collection by looking for commonly implemented property pages. </summary> protected static IEnumerable <PropertyPage> addFromGraph(ICaptureGraphBuilder2 graphBuilder, IBaseFilter videoDeviceFilter, IBaseFilter audioDeviceFilter, IBaseFilter videoCompressorFilter, IBaseFilter audioCompressorFilter, SourceCollection videoSources, SourceCollection audioSources) { var result = new List <PropertyPage>(); object filter = null; Trace.Assert(graphBuilder != null); // 1. the video capture filter addIfSupported(result, videoDeviceFilter, "Video Capture Device"); // 2. the video capture pin DsGuid cat = DsGuid.FromGuid(PinCategory.Capture); DsGuid med = DsGuid.FromGuid(MediaType.Interleaved); Guid iid = typeof(IAMStreamConfig).GUID; int hr = graphBuilder.FindInterface(cat, med, videoDeviceFilter, iid, out filter); //int hr = graphBuilder.FindInterface(ref cat, ref med, videoDeviceFilter, ref iid, out filter); if (hr != 0) { med = DsGuid.FromGuid(MediaType.Video); hr = graphBuilder.FindInterface(cat, med, videoDeviceFilter, iid, out filter); if (hr != 0) { filter = null; } } addIfSupported(result, filter, "Video Capture Pin"); // 3. the video preview pin cat = DsGuid.FromGuid(PinCategory.Preview); med = DsGuid.FromGuid(MediaType.Interleaved); iid = typeof(IAMStreamConfig).GUID; hr = graphBuilder.FindInterface(cat, med, videoDeviceFilter, iid, out filter); if (hr != 0) { med = DsGuid.FromGuid(MediaType.Video); hr = graphBuilder.FindInterface(cat, med, videoDeviceFilter, iid, out filter); if (hr != 0) { filter = null; } } addIfSupported(result, filter, "Video Preview Pin"); // 4. the video crossbar(s) var crossbars = new List <IAMCrossbar>(); int num = 1; for (int c = 0; c < videoSources.Count; c++) { CrossbarSource s = videoSources[c] as CrossbarSource; if (s != null) { if (crossbars.IndexOf(s.Crossbar) < 0) { crossbars.Add(s.Crossbar); if (addIfSupported(result, s.Crossbar, "Video Crossbar " + (num == 1 ? "" : num.ToString()))) { num++; } } } } crossbars.Clear(); // 5. the video compressor addIfSupported(result, videoCompressorFilter, "Video Compressor"); // 6. the video TV tuner cat = DsGuid.FromGuid(PinCategory.Capture); med = DsGuid.FromGuid(MediaType.Interleaved); iid = typeof(IAMTVTuner).GUID; hr = graphBuilder.FindInterface(cat, med, videoDeviceFilter, iid, out filter); if (hr != 0) { med = DsGuid.FromGuid(MediaType.Video); hr = graphBuilder.FindInterface(cat, med, videoDeviceFilter, iid, out filter); if (hr != 0) { filter = null; } } addIfSupported(result, filter, "TV Tuner"); // 7. the video compressor (VFW) IAMVfwCompressDialogs compressDialog = videoCompressorFilter as IAMVfwCompressDialogs; if (compressDialog != null) { VfwCompressorPropertyPage page = new VfwCompressorPropertyPage("Video Compressor", compressDialog); result.Add(page); } // 8. the audio capture filter addIfSupported(result, audioDeviceFilter, "Audio Capture Device"); // 9. the audio capture pin cat = DsGuid.FromGuid(PinCategory.Capture); med = DsGuid.FromGuid(MediaType.Audio); iid = typeof(IAMStreamConfig).GUID; hr = graphBuilder.FindInterface(cat, med, audioDeviceFilter, iid, out filter); if (hr != 0) { filter = null; } addIfSupported(result, filter, "Audio Capture Pin"); // 9. the audio preview pin cat = DsGuid.FromGuid(PinCategory.Preview); med = DsGuid.FromGuid(MediaType.Audio); iid = typeof(IAMStreamConfig).GUID; hr = graphBuilder.FindInterface(cat, med, audioDeviceFilter, iid, out filter); if (hr != 0) { filter = null; } addIfSupported(result, filter, "Audio Preview Pin"); // 10. the audio crossbar(s) num = 1; for (int c = 0; c < audioSources.Count; c++) { CrossbarSource s = audioSources[c] as CrossbarSource; if (s != null) { if (crossbars.IndexOf(s.Crossbar) < 0) { crossbars.Add(s.Crossbar); if (addIfSupported(result, s.Crossbar, "Audio Crossbar " + (num == 1 ? "" : num.ToString()))) { num++; } } } } crossbars.Clear(); // 11. the audio compressor addIfSupported(result, audioCompressorFilter, "Audio Compressor"); return(result); }
/// <summary> /// Populate the internal InnerList with sources/physical connectors /// found on the crossbars. Each instance of this class is limited /// to video only or audio only sources ( specified by the isVideoDevice /// parameter on the constructor) so we check each source before adding /// it to the list. /// </summary> protected static IEnumerable <CrossbarSource> findCrossbarSources(ICaptureGraphBuilder2 graphBuilder, IAMCrossbar crossbar, bool isVideoDevice) { //ArrayList sources = new ArrayList(); var sources = new List <CrossbarSource>(); int numOutPins; int numInPins; int hr = crossbar.get_PinCounts(out numOutPins, out numInPins); Marshal.ThrowExceptionForHR(hr); // We loop through every combination of output and input pin // to see which combinations match. // Loop through output pins for (int cOut = 0; cOut < numOutPins; cOut++) { // Loop through input pins for (int cIn = 0; cIn < numInPins; cIn++) { // Can this combination be routed? hr = crossbar.CanRoute(cOut, cIn); if (hr == 0) { // Yes, this can be routed int relatedPin; PhysicalConnectorType connectorType; hr = crossbar.get_CrossbarPinInfo(true, cIn, out relatedPin, out connectorType); if (hr < 0) { Marshal.ThrowExceptionForHR(hr); } // Is this the correct type?, If so add to the InnerList CrossbarSource source = new CrossbarSource(crossbar, cOut, cIn, connectorType); if (connectorType < PhysicalConnectorType.Audio_Tuner) { if (isVideoDevice) { sources.Add(source); } else if (!isVideoDevice) { sources.Add(source); } } } } } // Some silly drivers (*cough* Nvidia *cough*) add crossbars // with no real choices. Every input can only be routed to // one output. Loop through every Source and see if there // at least one other Source with the same output pin. int refIndex = 0; while (refIndex < sources.Count) { bool found = false; CrossbarSource refSource = (CrossbarSource)sources[refIndex]; for (int c = 0; c < sources.Count; c++) { CrossbarSource s = (CrossbarSource)sources[c]; if ((refSource.OutputPin == s.OutputPin) && (refIndex != c)) { found = true; break; } } if (found) { refIndex++; } else { sources.RemoveAt(refIndex); } } return(sources); }