/// <summary>
/// Get a read-only list of all renderers that are supported on the current system.
/// </summary>
public ReadOnlyCollection <Renderer> GetPresentVideoRenderers()
{
IList <Renderer> renderers = new List <Renderer>();
if (_pMapper != null)
{
IEnumMoniker pEnum;
IMoniker[] pMonikers = new IMoniker[1];
Guid IID_IBaseFilter = typeof(IBaseFilter).GUID;
Guid[] inTypes = new Guid[] { DirectShow.MediaType.Video, Guid.Empty };
int hr = _pMapper.EnumMatchingFilters(out pEnum,
0, // Reserved
true, // Use exact match?
(int)MERIT.MERIT_DO_NOT_USE,
true, // At least one input pin?
inTypes.Length / 2, // Number of major type/subtype pairs for input
inTypes, // Array of major type/subtype pairs for input
IntPtr.Zero, // Input medium
IntPtr.Zero, // Input pin category
true, // Must be a renderer?
false, // At least one output pin?
0, // Number of major type/subtype pairs for output
null, // Array of major type/subtype pairs for output
IntPtr.Zero, // Output medium
IntPtr.Zero); // Output pin category
if (DsHlp.SUCCEEDED(hr))
{
try
{
object o;
IntPtr cFetched = IntPtr.Zero;
while (pEnum.Next(1, pMonikers, cFetched) == DsHlp.S_OK)
{
o = null;
Guid clsId = Guid.Empty;
try
{
pMonikers[0].BindToObject(null, null,
ref IID_IBaseFilter, out o);
if (o != null && o is IBaseFilter)
{
IBaseFilter pBaseFilter = (IBaseFilter)o;
o = null;
pBaseFilter.GetClassID(out clsId);
Marshal.FinalReleaseComObject(pBaseFilter);
}
}
finally
{
Marshal.ReleaseComObject(pMonikers[0]);
}
IRenderer renderer = RendererBase.GetRenderer(clsId);
if (renderer != null)
{
renderers.Add(renderer.Renderer);
}
}
}
finally
{
Marshal.ReleaseComObject(pEnum);
}
}
}
return(new ReadOnlyCollection <Renderer>(renderers));
}