/// <summary>
/// Creates a new VMR9 renderer and configures it with an allocator
/// </summary>
/// <returns>An initialized DirectShow VMR9 renderer</returns>
private IBaseFilter CreateVideoMixingRenderer9(IGraphBuilder graph, int streamCount)
{
IBaseFilter vmr9;
try
{
vmr9 = new VideoMixingRenderer9() as IBaseFilter;
}
catch (COMException ex)
{
throw new WPFMediaKitException("Could not create VMR9, do you have the grahics driver and DirectX properly installed?", ex);
}
var filterConfig = vmr9 as IVMRFilterConfig9;
if (filterConfig == null)
{
throw new WPFMediaKitException("Could not query VMR9 filter configuration.");
}
/* We will only have one video stream connected to the filter */
int hr = filterConfig.SetNumberOfStreams(streamCount);
DsError.ThrowExceptionForHR(hr);
/* Setting the renderer to "Renderless" mode
* sounds counter productive, but its what we
* need to do for setting up a custom allocator */
hr = filterConfig.SetRenderingMode(VMR9Mode.Renderless);
DsError.ThrowExceptionForHR(hr);
/* Query the allocator interface */
var vmrSurfAllocNotify = vmr9 as IVMRSurfaceAllocatorNotify9;
if (vmrSurfAllocNotify == null)
{
throw new WPFMediaKitException("Could not query the VMR surface allocator.");
}
var allocator = new Vmr9Allocator();
/* We supply our custom allocator to the renderer */
hr = vmrSurfAllocNotify.AdviseSurfaceAllocator(m_userId, allocator);
DsError.ThrowExceptionForHR(hr);
hr = allocator.AdviseNotify(vmrSurfAllocNotify);
DsError.ThrowExceptionForHR(hr);
RegisterCustomAllocator(allocator);
hr = graph.AddFilter(vmr9,
string.Format("Renderer: {0}", VideoRendererType.VideoMixingRenderer9));
DsError.ThrowExceptionForHR(hr);
return(vmr9);
}
/// <summary>
/// Creates a new VMR9 renderer and configures it with an allocator
/// </summary>
/// <returns>An initialized DirectShow VMR9 renderer</returns>
private IBaseFilter CreateVideoMixingRenderer9(IGraphBuilder graph)
{
var vmr9 = new VideoMixingRenderer9() as IBaseFilter;
var filterConfig = vmr9 as IVMRFilterConfig9;
if (filterConfig == null)
throw new Exception("Could not query filter configuration.");
/* We will only have one video stream connected to the filter */
int hr = filterConfig.SetNumberOfStreams(4);
DsError.ThrowExceptionForHR(hr);
/* Setting the renderer to "Renderless" mode
* sounds counter productive, but its what we
* need to do for setting up a custom allocator */
hr = filterConfig.SetRenderingMode(VMR9Mode.Renderless);
DsError.ThrowExceptionForHR(hr);
/* Query the allocator interface */
var vmrSurfAllocNotify = vmr9 as IVMRSurfaceAllocatorNotify9;
if (vmrSurfAllocNotify == null)
throw new Exception("Could not query the VMR surface allocator.");
/* We supply an hWnd so Direct3D can initialize */
var allocator = new Vmr9Allocator(HwndHelper.Handle);
/* We supply our custom allocator to the renderer */
hr = vmrSurfAllocNotify.AdviseSurfaceAllocator(userId, allocator);
DsError.ThrowExceptionForHR(hr);
hr = allocator.AdviseNotify(vmrSurfAllocNotify);
DsError.ThrowExceptionForHR(hr);
RegisterCustomAllocator(allocator);
hr = graph.AddFilter(vmr9, //"Renderer: 1");
string.Format("Renderer: {0}",
VideoRendererType.VideoMixingRenderer9));
DsError.ThrowExceptionForHR(hr);
return vmr9;
}