// disconnect all connected audio out pins and remove unused filters private void StripSplitter(IGraphBuilder pGraphBuilder) { if (_splitterFilter != null) { IPin pPin = null; int nSkip = 0; while ((pPin = DsUtils.GetPin(_splitterFilter, PinDirection.Output, true, nSkip)) != null) { if (DsUtils.IsMediaTypeSupported(pPin, MediaType.Audio) == 0 || DsUtils.IsMediaTypeSupported(pPin, MediaType.Subtitle) == 0) { // this connected pin supports audio or subpicture type! DsUtils.Disconnect(pGraphBuilder, pPin); } else { nSkip++; } Marshal.ReleaseComObject(pPin); } // end of while DsUtils.RemoveRedundantFilters(_sourceFilter, pGraphBuilder); } }
public void RenderSubpicture(IGraphBuilder pGraphBuilder, IRenderer renderer) { if (FindSplitter(pGraphBuilder)) { _subpictureStreamHandler = SubpictureStreamHandlerFactory.GetHandler(_splitterFilter); if (_subpictureStreamHandler != null) { _subpictureStreamHandler.RenderSubpicture(pGraphBuilder, _splitterFilter, renderer); DsUtils.RemoveRedundantFilters(_sourceFilter, pGraphBuilder); } } }
// this function should be called AFTER the video stream has been rendered // but before rendering the audio streams // however, it will try to find the splitter even if video wasn't rendered private bool FindSplitter(IGraphBuilder pGraphBuilder) { if (_splitterFilter != null) { DsUtils.RemoveRedundantFilters(_sourceFilter, pGraphBuilder); return(true); } IEnumFilters pEnumFilters = null; IBaseFilter pFilter = null; int cFetched; bool bSplitterFound = false; int hr = pGraphBuilder.EnumFilters(out pEnumFilters); if (DsHlp.FAILED(hr)) { return(false); } IPin pPin; int nFilters = 0; bool bCanRelease; while ((pEnumFilters.Next(1, out pFilter, out cFetched) == DsHlp.S_OK)) { nFilters++; bCanRelease = true; pPin = DsUtils.GetPin(pFilter, PinDirection.Output, false, 0); if (pPin != null) { if (DsUtils.IsMediaTypeSupported(pPin, MediaType.Audio) == 0 || DsUtils.IsMediaTypeSupported(pPin, MediaType.Subtitle) == 0) { //this unconnected pin supports audio or subpicture type! bSplitterFound = true; bCanRelease = false; _splitterFilter = pFilter; } Marshal.ReleaseComObject(pPin); } //let's have a look at another filter if (bCanRelease) { Marshal.ReleaseComObject(pFilter); } if (bSplitterFound) { break; } } Marshal.ReleaseComObject(pEnumFilters); if (!bSplitterFound) { if (nFilters > 3) { pPin = DsUtils.GetPin(_sourceFilter, PinDirection.Output, true, 0); if (pPin != null) { IPin pInputPin; hr = pPin.ConnectedTo(out pInputPin); if (hr == DsHlp.S_OK) { PinInfo info = new PinInfo(); hr = pInputPin.QueryPinInfo(out info); if (hr == DsHlp.S_OK) { _splitterFilter = info.pFilter; bSplitterFound = true; } Marshal.ReleaseComObject(pInputPin); } Marshal.ReleaseComObject(pPin); } } else { _splitterFilter = _sourceFilter; bSplitterFound = true; } } StripSplitter(pGraphBuilder); return(bSplitterFound); }