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 IBaseFilter AddFilter(this IGraphBuilder pGraphBuilder, FilterDescription filterDescription)
{
var baseFilter = DsUtils.GetFilter(filterDescription.ClassId, true);
var hr = pGraphBuilder.AddFilter(baseFilter, filterDescription.Name);
if (DsHlp.FAILED(hr))
{
Marshal.FinalReleaseComObject(baseFilter);
hr.ThrowExceptionForHR();
}
return(baseFilter);
}