/// <summary>
/// Crée le graphe DirectShow
/// </summary>
void SetupGraph()
{
FiltersConfiguration filtersConfiguration = GraphHelper.GetFiltersConfiguration();
if (filtersConfiguration == null)
{
throw new InvalidOperationException("The filters are not configured");
}
//System.IO.FileStream fs = null;
try
{
ExtensionFiltersSource extensionFiltersSources = GraphHelper.GetExtensionFiltersSource(filtersConfiguration, _sourceFilePath);
try
{
/* Creates the GraphBuilder COM object */
_graph = new FilterGraphNoThread() as IGraphBuilder;
if (_graph == null)
{
throw new Exception("Could not create a graph");
}
//if (_graphLogLocation != null)
//{
// fs = System.IO.File.Create(_graphLogLocation);
// int r = _graph.SetLogFile(fs.Handle);
//}
//
// Creating FileSource filter
//
IBaseFilter sourceFilter = GraphHelper.CreateLAVSplitterSourceFilter(_graph, _sourceFilePath, out IPin parserAudioOutputPin, out IPin parserVideoOutputPin);
//
// Creating renderer
//
Type videoRendererFilterType = null;
IBaseFilter videoRenderer = null;
GraphHelper.CreateFilter(NULL_RENDERER, "Null Renderer", ref videoRendererFilterType, ref videoRenderer);
int hr = _graph.AddFilter(videoRenderer, "Null Renderer");
DsError.ThrowExceptionForHR(hr);
IPin videoRendererInputPin = DsFindPin.ByDirection(videoRenderer, PinDirection.Input, 0);
//
// Creating Video filter
//
// Connection du sample Grabber
IBaseFilter sampleGrabberFilter = (IBaseFilter)_sampleGrabber;
hr = _graph.AddFilter(sampleGrabberFilter, "Sample Grabber");
DsError.ThrowExceptionForHR(hr);
IPin sampleGrabberInputPin = DsFindPin.ByDirection(sampleGrabberFilter, PinDirection.Input, 0);
IPin sampleGrabberOuputPin = DsFindPin.ByDirection(sampleGrabberFilter, PinDirection.Output, 0);
//Insertion du Color Space Converter
Type filterType = null;
IBaseFilter colorSpaceConverter = null;
GraphHelper.CreateFilter(GraphHelper.CLSID_COLOR_SPACE_CONVERTER, GraphHelper.COLOR_SPACE_CONVERTER_FRIENDLYNAME, ref filterType, ref colorSpaceConverter);
hr = _graph.AddFilter(colorSpaceConverter, GraphHelper.COLOR_SPACE_CONVERTER_FRIENDLYNAME);
DsError.ThrowExceptionForHR(hr);
IPin colorSpaceConverterInputPin = DsFindPin.ByDirection(colorSpaceConverter, PinDirection.Input, 0);
GraphHelper.ConnectSplitterAndRendererWithDecoder(_graph, extensionFiltersSources, parserVideoOutputPin, colorSpaceConverterInputPin);
IPin colorSpaceConverterOutputPin = DsFindPin.ByDirection(colorSpaceConverter, PinDirection.Output, 0);
hr = _graph.ConnectDirect(colorSpaceConverterOutputPin, sampleGrabberInputPin, null);
DsError.ThrowExceptionForHR(hr);
hr = _graph.Connect(sampleGrabberOuputPin, videoRendererInputPin);
DsError.ThrowExceptionForHR(hr);
// Removes the clock to run the graph as fast as possible
((IMediaFilter)_graph).SetSyncSource(null);
GraphHelper.SafeRelease(parserAudioOutputPin);
GraphHelper.SafeRelease(parserVideoOutputPin);
GraphHelper.SafeRelease(videoRendererInputPin);
GraphHelper.SafeRelease(sampleGrabberInputPin);
GraphHelper.SafeRelease(sampleGrabberOuputPin);
GraphHelper.SafeRelease(colorSpaceConverterInputPin);
GraphHelper.SafeRelease(colorSpaceConverterOutputPin);
_mediaSeeking = _graph as IMediaSeeking;
_mediaControl = _graph as IMediaControl;
_mediaEvent = _graph as IMediaEventEx;
/* Attempt to set the time format */
hr = _mediaSeeking.SetTimeFormat(TimeFormat.MediaTime);
DsError.ThrowExceptionForHR(hr);
}
catch (Exception ex)
{
this.TraceError(ex, ex.Message);
/* This exection will happen usually if the media does
* not exist or could not open due to not having the
* proper filters installed */
FreeResources();
}
}
finally
{
/*if (_graphLogLocation != null && fs != null)
* fs.Close();*/
}
}