private void CloseGraph()
{
FilterState state;
if (mediaControl != null)
{
do
{
mediaControl.Stop();
mediaControl.GetState(0, out state);
} while (state != FilterState.Stopped);
mediaControl = null;
}
if (allocator != null)
{
allocator.Dispose();
allocator = null;
}
if (filter != null)
{
Marshal.ReleaseComObject(filter);
filter = null;
}
if (graph != null)
{
RemoveAllFilters();
Marshal.ReleaseComObject(graph);
graph = null;
}
}
private void SetAllocatorPresenter()
{
int hr = 0;
IVMRSurfaceAllocatorNotify9 vmrSurfAllocNotify = (IVMRSurfaceAllocatorNotify9) filter;
try
{
allocator = new Allocator(this);
hr = vmrSurfAllocNotify.AdviseSurfaceAllocator(userId, allocator);
DsError.ThrowExceptionForHR(hr);
hr = allocator.AdviseNotify(vmrSurfAllocNotify);
DsError.ThrowExceptionForHR(hr);
}
catch
{
allocator = null;
throw;
}
}
public void InitVMR9(string filename)
{
int hr = 0;
// Create a DirectShow FilterGraph
graphBuilder = (IFilterGraph2) new FilterGraph();
// Add it in ROT for debug purpose
rot = new DsROTEntry(graphBuilder);
// Add a notification handler (see WndProc)
hr = (graphBuilder as IMediaEventEx).SetNotifyWindow(this.Handle, WM_GRAPHNOTIFY, IntPtr.Zero);
DsError.ThrowExceptionForHR(hr);
// Create a VMR9 object
vmr9 = (IBaseFilter) new VideoMixingRenderer9();
IVMRFilterConfig9 filterConfig = (IVMRFilterConfig9) vmr9;
// We want the Renderless mode!
hr = filterConfig.SetRenderingMode(VMR9Mode.Renderless);
DsError.ThrowExceptionForHR(hr);
// Create the Allocator / Presenter object
allocator = new Allocator(device);
IVMRSurfaceAllocatorNotify9 vmrSurfAllocNotify = (IVMRSurfaceAllocatorNotify9) vmr9;
// Notify the VMR9 filter about our allocator
hr = vmrSurfAllocNotify.AdviseSurfaceAllocator(IntPtr.Zero, allocator);
DsError.ThrowExceptionForHR(hr);
// Notify our allocator about the VMR9 filter
hr = allocator.AdviseNotify(vmrSurfAllocNotify);
DsError.ThrowExceptionForHR(hr);
if (config.IsUsingMixing)
{
// One stream is enough for this sample
// This line also load the mixing componant
hr = filterConfig.SetNumberOfStreams(1);
DsError.ThrowExceptionForHR(hr);
IVMRMixerControl9 mixerControl = (IVMRMixerControl9) vmr9;
// Select the mixer mode : YUV or RGB
if (config.UseYUVMixing)
{
hr = mixerControl.SetMixingPrefs(VMR9MixerPrefs.RenderTargetYUV | VMR9MixerPrefs.NoDecimation | VMR9MixerPrefs.ARAdjustXorY | VMR9MixerPrefs.BiLinearFiltering);
}
else
{
hr = mixerControl.SetMixingPrefs(VMR9MixerPrefs.RenderTargetRGB | VMR9MixerPrefs.NoDecimation | VMR9MixerPrefs.ARAdjustXorY | VMR9MixerPrefs.BiLinearFiltering);
}
DsError.ThrowExceptionForHR(hr);
Debug.WriteLine("Using VMR9 mixing mode");
}
// Add the filter to the graph
hr = graphBuilder.AddFilter(vmr9, "Video Mixing Renderer 9");
DsError.ThrowExceptionForHR(hr);
// Render the file
hr = graphBuilder.RenderFile(filename, null);
DsError.ThrowExceptionForHR(hr);
// Run the graph
hr = (graphBuilder as IMediaControl).Run();
DsError.ThrowExceptionForHR(hr);
}