VMR9 windowless mode window size in running

[ismopa]

I have used directshow.net now two years and I am really happy with it. Thanks
for developers.

Now I have problem to change my video window size in while running graph. I
have form panel that size i change while running. Wideo size does not change.
When I use ivideowindow mode, it works by calling configure ivideowindow. But
I need Windowless mode. Is it possible to change window size while graph
running?

Code

private void ConfigureVMR9InWindowlessMode()
{
int hr = 0;

IVMRFilterConfig9 filterConfig = (IVMRFilterConfig9)vmr9prev;

// Not really needed for VMR9 but don't forget calling it with VMR7
hr = filterConfig.SetNumberOfStreams(1);
DsError.ThrowExceptionForHR(hr);

// Change VMR9 mode to Windowless
hr = filterConfig.SetRenderingMode(VMR9Mode.Windowless);
DsError.ThrowExceptionForHR(hr);

windowlessCtrl = (IVMRWindowlessControl9)vmr9prev;

// Set "Parent" window
hr = windowlessCtrl.SetVideoClippingWindow(this.vikkuna1.Handle);
DsError.ThrowExceptionForHR(hr);

// Set Aspect-Ratio
hr = windowlessCtrl.SetAspectRatioMode(VMR9AspectRatioMode.None);
DsError.ThrowExceptionForHR(hr);

// Add delegates for Windowless operations
AddHandlers();

// Call the resize handler to configure the output size
MainForm_ResizeMove(null, null);
}

private void AddHandlers()
{
// Add handlers for VMR purpose
this.vikkuna1.Paint += new PaintEventHandler(MainForm_Paint); // for WM_PAINT
this.vikkuna1.Resize += new EventHandler(MainForm_ResizeMove); // for WM_SIZE
this.vikkuna1.Move += new EventHandler(MainForm_ResizeMove); // for WM_MOVE

SystemEvents.DisplaySettingsChanged += new
EventHandler(SystemEvents_DisplaySettingsChanged); // for WM_DISPLAYCHANGE
}
private void MainForm_Paint(object sender, PaintEventArgs e)
{
if (windowlessCtrl != null)
{
IntPtr hdc = e.Graphics.GetHdc();
int hr = windowlessCtrl.RepaintVideo(this.vikkuna1.Handle, hdc);
e.Graphics.ReleaseHdc(hdc);
}
}
private void MainForm_ResizeMove(object sender, EventArgs e)
{
if (windowlessCtrl != null)
{
int hr = windowlessCtrl.SetVideoPosition(null,
DsRect.FromRectangle(this.vikkuna1.ClientRectangle));
}
}
private void SystemEvents_DisplaySettingsChanged(object sender, EventArgs e)
{
if (windowlessCtrl != null)
{
int hr = windowlessCtrl.DisplayModeChanged();
}
}

[Peter_B]

You have to change the size yourself with SetVideoPosition.
From the BitmapMixer sample:

private void MainForm_ResizeMove(object sender, EventArgs e)

{
if (windowlessCtrl != null)
{
int hr = windowlessCtrl.SetVideoPosition(null,
DsRect.FromRectangle(this.ClientRectangle));
}
}

Peter

[ismopa]

Thanks Peter,

Actually I have tryed that

code:

Rectangle rc = new Rectangle(0, 0, vikkunamain.Width, vikkunamain.Height);
int hr = windowlessCtrl.SetVideoPosition(null, rc);

in running but I get error message:
"
An unhandled exception of type
'System.Runtime.InteropServices.InvalidComObjectException' occurred in
video.exe
Additional information: COM object that has been separated from its underlying
RCW cannot be used.
"

[Peter_B]

Then you have released something you still need.
I don't know much about C#, I use VB, so I didn't have a closer look at your
code.
The windowlessCtrl must have been released or something upon which it depends.

Peter

[Eric]

The "underlying RCW cannot be used" error can also be linked to a
STA problem. In STA threading model, when you create a COM object in a thead
A, it can't be use in a thread B.

There is many topics in this forum that address this problem. Try a search
with STAThread or MTAThread...

[ismopa]

Thanks Peter and Nowinskie. Problek solved.
Reason for error was VMR releasing before
hr = windowlessCtrl.SetVideoPosition
call.