private static IFilterGraph GetInitialFilterGraph(string source,
MediaSourceType mediaSourceType)
{
IFilterGraph filterGraph;
if (mediaSourceType == MediaSourceType.Dvd)
{
filterGraph = new DvdFilterGraph();
}
else
{
var sourceType = GetSourceTypeByExtension(source);
switch (sourceType)
{
case SourceType.Basic:
case SourceType.Asf:
case SourceType.Mkv:
case SourceType.Flv:
filterGraph = new RegularFilterGraph(sourceType, Guid.Empty);
break;
case SourceType.Dvd:
filterGraph = new DvdFilterGraph();
break;
default:
TraceSink.GetTraceSink().TraceWarning("Could not identify source type.");
throw new FilterGraphBuilderException(GraphBuilderError.CantPlayFile);
}
}
return(filterGraph);
}
public static Tuple <IBaseFilter, IBasicAudio> AddSoundRenderer(this IGraphBuilder pGraphBuilder)
{
var baseFilter = DsUtils.GetFilter(Clsid.DSoundRender, false);
if (baseFilter == null)
{
TraceSink.GetTraceSink().TraceWarning("Could not instantiate DirectSound Filter.");
return(null);
}
// add the DirectSound filter to the graph
var hr = pGraphBuilder.AddFilter(baseFilter, "DirectSound Filter");
if (DsHlp.FAILED(hr))
{
Marshal.FinalReleaseComObject(baseFilter);
TraceSink.GetTraceSink().TraceWarning("Could not add DirectSound Filter to the filter graph.");
return(null);
}
IBasicAudio basicAudio = baseFilter as IBasicAudio;
if (basicAudio == null)
{
pGraphBuilder.RemoveFilter(baseFilter);
Marshal.FinalReleaseComObject(baseFilter);
TraceSink.GetTraceSink().TraceWarning("Could not get IBasicAudio interface.");
return(null);
}
return(new Tuple <IBaseFilter, IBasicAudio>(baseFilter, basicAudio));
}
public static TraceSink GetTraceSink()
{
return(_traceSink ?? (_traceSink = new TraceSink()));
}
public static IFilterGraph BuildFilterGraph(string source,
MediaSourceType mediaSourceType,
IntPtr hMediaWindow,
Renderer preferredVideoRenderer,
Action <string> onErrorCallback,
Func <string, bool> onPartialSuccessCallback)
{
IFilterGraph filterGraph = null;
var success = false;
try
{
TraceSink.GetTraceSink().TraceInformation(
String.Format("Start building filter graph. Source: {0}. WhatToPlay: {1}. PreferredVideoRenderer: {2}.",
source, mediaSourceType, preferredVideoRenderer));
filterGraph = GetInitialFilterGraph(source, mediaSourceType);
var parameters = new FilterGraphBuilderParameters
{
Source = source,
MediaWindowHandle = hMediaWindow,
PreferredVideoRenderer = preferredVideoRenderer,
DiscPath = source,
Flags = AM_DVD_GRAPH_FLAGS.AM_DVD_HWDEC_PREFER,
OnPartialSuccessCallback = onPartialSuccessCallback
};
filterGraph.BuildUp(parameters);
#if DEBUG
filterGraph.AddToRot();
#endif
TraceSink.GetTraceSink().TraceInformation("The graph was built successfully.");
success = true;
return(filterGraph);
}
catch (AbortException)
{
TraceSink.GetTraceSink().TraceWarning("User abort.");
return(null);
}
catch (FilterGraphBuilderException e)
{
TraceSink.GetTraceSink().TraceError(e.ToString());
onErrorCallback(e.Message);
return(null);
}
catch (Exception e)
{
TraceSink.GetTraceSink().TraceError(e.ToString());
onErrorCallback(e.Message);
return(null);
}
finally
{
if (!success && filterGraph != null)
{
filterGraph.Dispose();
}
}
}