void InitDirectShow(IntPtr handle)
{
graphBuilder = (IGraphBuilder) new FilterGraph();
mediaControl = (IMediaControl)(IVideoWindow)graphBuilder;
videoWindow = (IVideoWindow)(IMediaControl)graphBuilder;
mediaEventEx = (IMediaEventEx)graphBuilder;
captureGraphBuilder = (ICaptureGraphBuilder2) new CaptureGraphBuilder2();
outputRenderer = (IBaseFilter) new VideoMixingRenderer9();
if (outputRenderer != null)
{
graphBuilder.AddFilter(outputRenderer, "Output");
aspectRatioControl = outputRenderer as IVMRAspectRatioControl;
aspectRatioControl9 = outputRenderer as IVMRAspectRatioControl9;
}
var hr = mediaEventEx.SetNotifyWindow(handle, WM_GRAPHNOTIFY, IntPtr.Zero);
DsError.ThrowExceptionForHR(hr);
hr = captureGraphBuilder.SetFiltergraph(graphBuilder);
DsError.ThrowExceptionForHR(hr);
graphBuilderRotEntry = new DsROTEntry(graphBuilder);
}
void DeInitDirectShow()
{
if (mediaControl != null)
{
mediaControl.StopWhenReady();
}
if (mediaEventEx != null)
{
mediaEventEx.SetNotifyWindow(IntPtr.Zero, WM_GRAPHNOTIFY, IntPtr.Zero);
}
if (videoWindow != null)
{
videoWindow.put_Visible(OABool.False);
videoWindow.put_Owner(IntPtr.Zero);
}
Marshal.ReleaseComObject(mediaControl);
mediaControl = null;
Marshal.ReleaseComObject(mediaEventEx);
mediaControl = null;
Marshal.ReleaseComObject(videoWindow);
videoWindow = null;
Marshal.ReleaseComObject(graphBuilder);
graphBuilder = null;
Marshal.ReleaseComObject(captureGraphBuilder);
captureGraphBuilder = null;
Marshal.ReleaseComObject(outputRenderer);
outputRenderer = null;
Marshal.ReleaseComObject(aspectRatioControl);
aspectRatioControl = null;
Marshal.ReleaseComObject(aspectRatioControl9);
aspectRatioControl9 = null;
}
public void DoTests()
{
arControl = (IVMRAspectRatioControl9) new VideoMixingRenderer9();
try
{
TestAspectRatioMode();
}
finally
{
Marshal.ReleaseComObject(arControl);
}
}
protected override void Initialize(IGraphBuilder pGraphBuilder, IntPtr hMediaWindow)
{
if (_initialized)
{
base.Initialize(pGraphBuilder, hMediaWindow);
}
else
{
IVMRFilterConfig9 pVMRFilterConfig9 = (IVMRFilterConfig9)BaseFilter; // will be released when pBaseFilter is released
pVMRFilterConfig9.SetNumberOfStreams(NUMBER_OF_STREAMS);
IVMRAspectRatioControl9 pVMRAspectRatioControl9 = (IVMRAspectRatioControl9)BaseFilter;
pVMRAspectRatioControl9.SetAspectRatioMode(VMR9AspectRatioMode.VMR9ARMode_None);
_initialized = true;
}
}
//The following is called for building the PREVIEW graph
#region PREVIEW ONLY
public void Init()
{
Debug.WriteLine("VIDEO FOR PREVIEW");
pGraph = graph;
int hr = 0;
hr = pGraphBuilder.SetFiltergraph(pGraph);
DsError.ThrowExceptionForHR(hr);
pUSB = FindCaptureDevice();
hr = pGraph.AddFilter(pUSB, "WebCamControl Video");
DsError.ThrowExceptionForHR(hr);
hr = pGraph.AddFilter(pSampleGrabber as IBaseFilter, "SampleGrabber");
checkHR(hr, "Can't add SampleGrabber to graph");
i_grabber = (ISampleGrabber)pSampleGrabber;
i_grabber.SetBufferSamples(true);
IVMRAspectRatioControl9 ratioControl9 = (IVMRAspectRatioControl9)renderFilter;
hr = ratioControl9.SetAspectRatioMode(VMRAspectRatioMode.LetterBox);
DsError.ThrowExceptionForHR(hr);
hr = pGraph.AddFilter(renderFilter, "My Render Filter");
DsError.ThrowExceptionForHR(hr);
//SetFormat();
hr = pGraphBuilder.RenderStream(PinCategory.Preview, MediaType.Video, pUSB, (IBaseFilter)pSampleGrabber, renderFilter);
DsError.ThrowExceptionForHR(hr);
Debug.WriteLine(DsError.GetErrorText(hr) + " is error in rendering");
IEnumFilters enumFilters = null;
IBaseFilter[] baseFilters = { null };
IntPtr fetched = IntPtr.Zero;
hr = pGraph.EnumFilters(out enumFilters);
int r = 0;
while (r == 0)
{
try
{
r = enumFilters.Next(baseFilters.Length, baseFilters, fetched);
DsError.ThrowExceptionForHR(hr);
baseFilters[0].QueryFilterInfo(out FilterInfo filterInfo);
Debug.WriteLine(filterInfo.achName + " -filtername");
}
catch
{
r = 1;
continue;
}
}
SafeReleaseComObject(pUSB);
SafeReleaseComObject(pAVIMux);
SafeReleaseComObject(pGraph);
SafeReleaseComObject(pGraphBuilder);
SafeReleaseComObject(pSampleGrabber);
//SafeReleaseComObject(sampleGrabber);
SafeReleaseComObject(pSmartTee);
SafeReleaseComObject(renderFilter);
SafeReleaseComObject(nullRender);
SafeReleaseComObject(mediaEventEx);
SafeReleaseComObject(ratioControl9);
SafeReleaseComObject(streamConfig);
SafeReleaseComObject(mediaControl);
//SafeReleaseComObject(format);
//SafeReleaseComObject(i_grabber);
SafeReleaseComObject(graph);
SetupVideoWindow();
}
