protected override void Initialize(IGraphBuilder pGraphBuilder, IntPtr hMediaWindow)
{
object factoryObject = null;
object presenterObject = null;
try
{
int hr = ClassFactory.GetEvrPresenterClassFactory(ref CLSID_CustomEVRPresenter, ref ClassFactory.IID_ClassFactory, out factoryObject);
Marshal.ThrowExceptionForHR(hr);
IClassFactory factory = (IClassFactory)factoryObject;
var iidPresenter = typeof(IMFVideoPresenter).GUID;
hr = factory.CreateInstance(null, ref iidPresenter, out presenterObject);
Marshal.ThrowExceptionForHR(hr);
IMFVideoPresenter presenter = (IMFVideoPresenter)presenterObject;
IMFVideoRenderer renderer = (IMFVideoRenderer)BaseFilter; // will be released when IBaseFilter is released
renderer.InitializeRenderer(null, presenter);
IMFGetService pMFGetService = (IMFGetService)BaseFilter; // will be released when IBaseFilter is released
object o;
var serviceId = ServiceID.EnhancedVideoRenderer;
var iidImfVideoDisplayControl = typeof(IMFVideoDisplayControl).GUID;
Marshal.ThrowExceptionForHR(pMFGetService.GetService(ref serviceId, ref iidImfVideoDisplayControl, out o));
_pMFVideoDisplayControl = (IMFVideoDisplayControl)o;
_pMFVideoDisplayControl.SetVideoWindow(hMediaWindow);
_pMFVideoDisplayControl.SetAspectRatioMode(MFVideoAspectRatioMode.MFVideoARMode_None);
_pvpPresenterConfig = (IPvpPresenterConfig)presenterObject;
_pvpPresenterConfig.SetBufferCount(PRESENTER_BUFFER_COUNT);
_pvpPresenterHook.HookUp(presenterObject);
// as EVR requests IMFVideoDisplayControl from the presenter and our custom presenter implements IPvpPresenter and IPvpPresenterConfig
// presenterObject and _pMFVideoDisplayControl point to the same RCW
presenterObject = null; // we will release the presenter when releasing _pMFVideoDisplayControl
}
catch
{
_pMFVideoDisplayControl = null;
_pvpPresenterConfig = null;
}
finally
{
if (factoryObject != null)
{
Marshal.FinalReleaseComObject(factoryObject);
}
if (presenterObject != null)
{
Marshal.FinalReleaseComObject(presenterObject);
}
}
}
protected void Dispose(bool disp)
{
if (VideoPresenter != null)
{
Marshal.FinalReleaseComObject(VideoPresenter);
VideoPresenter = null;
}
}
public void Dispose()
{
if (VideoPresenter != null)
{
((IEVRPresenterRegisterCallback)VideoPresenter).RegisterCallback(null);
}
VideoPresenter = null;
}
/// <summary>
/// Create a new EVR video presenter
/// </summary>
/// <returns></returns>
public static EvrPresenter CreateNew()
{
// object comObject;
// int hr;
/* Our exception var we use to hold the exception
* until we need to throw it (after clean up) */
// Exception exception = null;
/* A COM object we query form our native library */
// IClassFactory factory = null;
/* Create our 'helper' class */
var evrPresenter = new EvrPresenter();
IMFVideoPresenter presenter = null;
try
{
var path = System.IO.Path.GetDirectoryName(new Uri(typeof(EvrPresenter).Assembly.CodeBase).LocalPath);
var dlltoload = System.IO.Path.Combine(path, IntPtr.Size == 8 ? @"EvrPresenter64.dll" : @"EvrPresenter32.dll");
presenter = COMUtil.CreateFromDll <IMFVideoPresenter>(dlltoload, EVR_PRESENTER_CLSID);
int count;
var settings = presenter as IEVRPresenterSettings;
DsError.ThrowExceptionForHR(settings.RegisterCallback(evrPresenter));
DsError.ThrowExceptionForHR(settings.GetBufferCount(out count));
DsError.ThrowExceptionForHR(settings.SetBufferCount(PRESENTER_BUFFER_COUNT));
/* Populate the IMFVideoPresenter */
evrPresenter.VideoPresenter = presenter;
}
catch (Exception ex)
{
COMUtil.TryFinalRelease(ref presenter);
throw new WPFMediaKitException("Could not create EnhancedVideoRenderer", ex);
}
return(evrPresenter);
// /* Call the DLL export to create the class factory */
/* if(ProcessBits == 32)
* hr = DllGetClassObject32(EVR_PRESENTER_CLSID, IUNKNOWN_GUID, out comObject);
* else if(ProcessBits == 64)
* hr = DllGetClassObject64(EVR_PRESENTER_CLSID, IUNKNOWN_GUID, out comObject);
* else
* {
* exception = new Exception(string.Format("{0} bit processes are unsupported", ProcessBits));
* goto bottom;
* }
*/
/* Check if our call to our DLL failed */
/* if(hr != 0 || comObject == null)
* {
* exception = new COMException("Could not create a new class factory.", hr);
* goto bottom;
* }
*/
/* Cast the COM object that was returned to a COM interface type */
/* factory = comObject as IClassFactory;
*
* if(factory == null)
* {
* exception = new Exception("Could not QueryInterface for the IClassFactory interface");
* goto bottom;
* }
*
* /* Get the GUID of the IMFVideoPresenter */
// Guid guidVideoPresenter = typeof(IMFVideoPresenter).GUID;
/* Creates a new instance of the IMFVideoPresenter */
// factory.CreateInstance(null, ref guidVideoPresenter, out comObject);
/* QueryInterface for the IMFVideoPresenter */
// var presenter = comObject as IMFVideoPresenter;
/* QueryInterface for our callback registration interface */
/* var registerCb = comObject as IEVRPresenterRegisterCallback;
* if(registerCb == null)
* {
* exception = new Exception("Could not QueryInterface for IEVRPresenterRegisterCallback");
* goto bottom;
* }
*/
/* Register the callback to the 'helper' class we created */
// registerCb.RegisterCallback(evrPresenter);
/* Populate the IMFVideoPresenter */
// evrPresenter.VideoPresenter = presenter;
// bottom:
// if(factory != null)
// Marshal.FinalReleaseComObject(factory);
/* if(exception != null)
* throw exception;
*
* return evrPresenter;*/
}
public void Dispose()
{
if (VideoPresenter != null)
{
((IEVRPresenterRegisterCallback)VideoPresenter).RegisterCallback(null);
}
VideoPresenter = null;
}
protected void Dispose(bool disp)
{
if (VideoPresenter != null)
{
Marshal.FinalReleaseComObject(VideoPresenter);
VideoPresenter = null;
}
}