public int InitializeDevice(IntPtr dwUserID, ref VMR9AllocationInfo lpAllocInfo, ref int lpNumBuffers)
{
int hr = 0;
Debug.WriteLine(string.Format("{0}x{1} : {2} / {3} / 0x{4:x}", lpAllocInfo.dwWidth, lpAllocInfo.dwHeight, FourCCToStr(lpAllocInfo.Format), lpAllocInfo.Pool, lpAllocInfo.dwFlags));
// if format is YUV ? (note : 0x30303030 = " ")
if (lpAllocInfo.Format > 0x30303030)
{
// Check if the hardware support format conversion from this YUV format to the RGB desktop format
if (!D3D.CheckDeviceFormatConversion(creationParameters.AdapterOrdinal, creationParameters.DeviceType, (Format)lpAllocInfo.Format, adapterInfo.CurrentDisplayMode.Format))
{
// If not, refuse this format!
// The VMR9 will propose other formats supported by the downstream filter output pin.
return(D3DERR_INVALIDCALL);
}
}
try
{
IntPtr unmanagedDevice = device.ComPointer;
IntPtr hMonitor = D3D.GetAdapterMonitor(adapterInfo.Adapter);
// Give our Direct3D device to the VMR9 filter
hr = vmrSurfaceAllocatorNotify.SetD3DDevice(unmanagedDevice, hMonitor);
DsError.ThrowExceptionForHR(hr);
videoSize = new Size(lpAllocInfo.dwWidth, lpAllocInfo.dwHeight);
int width = 1;
int height = 1;
// If hardware require textures to power of two sized
if ((device.Capabilities.TextureCaps & TextureCaps.Pow2) == TextureCaps.Pow2)
{
// Compute the ideal size
while (width < lpAllocInfo.dwWidth)
{
width = width << 1;
}
while (height < lpAllocInfo.dwHeight)
{
height = height << 1;
}
// notify this change to the VMR9 filter
lpAllocInfo.dwWidth = width;
lpAllocInfo.dwHeight = height;
}
textureSize = new Size(lpAllocInfo.dwWidth, lpAllocInfo.dwHeight);
// Just in case
DeleteSurfaces();
// if format is YUV ?
if (lpAllocInfo.Format > 0x30303030)
{
// An offscreen surface must be created
lpAllocInfo.dwFlags |= VMR9SurfaceAllocationFlags.OffscreenSurface;
// Create it
videoSurface = Surface.CreateOffscreenPlain(device, lpAllocInfo.dwWidth, lpAllocInfo.dwHeight, (Format)lpAllocInfo.Format, (Pool)lpAllocInfo.Pool);
// And get it unmanaged pointer
unmanagedSurface = videoSurface.ComPointer;
// Then create a private texture for the client application
privateTexture = new Texture(
device,
lpAllocInfo.dwWidth,
lpAllocInfo.dwHeight,
1,
Usage.RenderTarget,
adapterInfo.CurrentDisplayMode.Format,
Pool.Default
);
// Get the MipMap surface 0 for the copy (see PresentImage)
privateSurface = privateTexture.GetSurfaceLevel(0);
// This code path need a surface copy
needCopy = true;
}
else
{
// in RGB pixel format
lpAllocInfo.dwFlags |= VMR9SurfaceAllocationFlags.TextureSurface;
// Simply create a texture
privateTexture = new Texture(
device,
lpAllocInfo.dwWidth,
lpAllocInfo.dwHeight,
1,
Usage.RenderTarget,
adapterInfo.CurrentDisplayMode.Format,
Pool.Default
);
// And get the MipMap surface 0 for the VMR9 filter
privateSurface = privateTexture.GetSurfaceLevel(0);
unmanagedSurface = privateSurface.ComPointer;
// This code path don't need a surface copy.
// The client appllication use the same texture the VMR9 filter use.
needCopy = false;
}
// This allocator only support 1 buffer.
// Notify the VMR9 filter
lpNumBuffers = 1;
}
catch (SlimDXException e)
{
// A Direct3D error can occure : Notify it to the VMR9 filter
return(e.ResultCode.Code);
}
catch
{
// Or else, notify a more general error
return(E_FAIL);
}
// This allocation is a success
return(0);
}