private IEnumPins GetTestEnum()
{
IBaseFilter filter = new SmartTee() as IBaseFilter;
int hr;
IEnumPins ppEnum;
hr = filter.EnumPins(out ppEnum);
DsError.ThrowExceptionForHR(hr);
return(ppEnum);
}
private static IPin GetSmartTeeInputPin()
{
IBaseFilter filter = new SmartTee() as IBaseFilter;
int hr;
IntPtr ip = Marshal.AllocCoTaskMem(4);
IEnumPins ppEnum;
IPin pRet = null;
IPin[] pPins = new IPin[1];
hr = filter.EnumPins(out ppEnum);
Marshal.ThrowExceptionForHR(hr);
while ((ppEnum.Next(1, pPins, ip) >= 0) && (Marshal.ReadInt32(ip) == 1))
{
pRet = pPins[0];
break;
}
Marshal.FreeCoTaskMem(ip);
Marshal.ReleaseComObject(ppEnum);
return(pRet);
}
///////////////////////////////////////////////////////////////////////////////
// Inherited methods //
///////////////////////////////////////////////////////////////////////////////
#region OVERRIDES
#endregion //OVERRIDES
///////////////////////////////////////////////////////////////////////////////
// Eventhandler //
///////////////////////////////////////////////////////////////////////////////
#region EVENTS
///////////////////////////////////////////////////////////////////////////////
// Eventhandler for UI, Menu, Buttons, Toolbars etc. //
///////////////////////////////////////////////////////////////////////////////
#region WINDOWSEVENTHANDLER
#endregion //WINDOWSEVENTHANDLER
///////////////////////////////////////////////////////////////////////////////
// Eventhandler for Custom Defined Events //
///////////////////////////////////////////////////////////////////////////////
#region CUSTOMEVENTHANDLER
#endregion //CUSTOMEVENTHANDLER
#endregion //EVENTS
///////////////////////////////////////////////////////////////////////////////
// Methods and Eventhandling for Background tasks //
///////////////////////////////////////////////////////////////////////////////
#region BACKGROUNDWORKER
#endregion //BACKGROUNDWORKER
///////////////////////////////////////////////////////////////////////////////
// Methods for doing main class job //
///////////////////////////////////////////////////////////////////////////////
#region PRIVATEMETHODS
/// <summary>
/// Build the filter graph
/// </summary>
/// <returns>True if successful, otherwise false.</returns>
private bool SetupGraph()
{
int hr;
// Get the graphbuilder object
this.filterGraph = new FilterGraph() as IFilterGraph2;
// Get a ICaptureGraphBuilder2 to help build the graph
ICaptureGraphBuilder2 captureGraph = (ICaptureGraphBuilder2) new CaptureGraphBuilder2();
try
{
// Link the ICaptureGraphBuilder2 to the IFilterGraph2
hr = captureGraph.SetFiltergraph(this.filterGraph);
DsError.ThrowExceptionForHR(hr);
#if DEBUG
// Allows you to view the graph with GraphEdit File/Connect
this.dsRot = new DsROTEntry(this.filterGraph);
#endif
// Our data source one
IBaseFilter bitmapSource = (IBaseFilter) new GenericSampleSourceFilter();
// Create a DMO Wrapper Filter
IBaseFilter dmoFilter = (IBaseFilter) new DMOWrapperFilter();
IDMOWrapperFilter dmoWrapperFilter = (IDMOWrapperFilter)dmoFilter;
Guid g = this.FindGuid("DmoMixer", DMOCategory.VideoEffect);
hr = dmoWrapperFilter.Init(g, DMOCategory.VideoEffect);
DMOError.ThrowExceptionForHR(hr);
try
{
// Get the pin from the filter so we can configure it
IPin ipin = DsFindPin.ByDirection(bitmapSource, PinDirection.Output, 0);
try
{
// Configure the pin using the provided BitmapInfo
this.ConfigurePusher((IGenericSampleConfig)ipin);
}
catch (Exception ex)
{
ExceptionMethods.HandleException(ex);
return(false);
}
finally
{
Marshal.ReleaseComObject(ipin);
}
// Add the bitmap source to the graph
hr = this.filterGraph.AddFilter(bitmapSource, "BitmapSourceFilter");
DsError.ThrowExceptionForHR(hr);
IBaseFilter webcamSource = null;
if (this.videoExportProperties.UserVideoProperties.IsStreamRendered)
{
hr = this.filterGraph.AddSourceFilter(
this.videoExportProperties.UserVideoTempFile,
"WebcamVideoSource",
out webcamSource);
DsError.ThrowExceptionForHR(hr);
}
// Add it to the Graph
hr = this.filterGraph.AddFilter(dmoFilter, "DMO Filter");
DsError.ThrowExceptionForHR(hr);
this.SetDMOParams(dmoFilter, this.videoExportProperties);
// Add the Video compressor filter to the graph
if (this.videoCompressor != null)
{
hr = this.filterGraph.AddFilter(this.videoCompressor, "video compressor filter");
DsError.ThrowExceptionForHR(hr);
}
// Create the file writer part of the graph.
// SetOutputFileName does this for us, and returns the mux and sink
IBaseFilter mux;
IFileSinkFilter sink;
hr = captureGraph.SetOutputFileName(MediaSubType.Avi, this.videoExportProperties.OutputVideoProperties.Filename, out mux, out sink);
DsError.ThrowExceptionForHR(hr);
// Connect the bitmap source to the dmo mixer filter
hr = captureGraph.RenderStream(
null,
null,
bitmapSource,
null,
dmoFilter);
DsError.ThrowExceptionForHR(hr);
// If there is a webcam source connect it to the second input of the dmo mixer
if (webcamSource != null)
{
hr = captureGraph.RenderStream(
null,
null,
webcamSource,
null,
dmoFilter);
DsError.ThrowExceptionForHR(hr);
}
// Create a smart tee filter to enable preview and capture pins
IBaseFilter smartTee = new SmartTee() as IBaseFilter;
// Add the filter to the graph
hr = this.filterGraph.AddFilter(smartTee, "Smart Tee");
DsError.ThrowExceptionForHR(hr);
// Connect the dmo mixer output to the smart tee
hr = captureGraph.RenderStream(
null,
null,
dmoFilter,
null,
smartTee);
DsError.ThrowExceptionForHR(hr);
// Render the smart tee capture pin to the capture part including
// compressor to the file muxer.
hr = captureGraph.RenderStream(
null,
null,
smartTee,
this.videoCompressor,
mux);
DsError.ThrowExceptionForHR(hr);
// Render the smart tee preview pin to the default video renderer
hr = captureGraph.RenderStream(
null,
null,
smartTee,
null,
null);
DsError.ThrowExceptionForHR(hr);
// Configure the Video Window
this.videoWindow = this.filterGraph as IVideoWindow;
this.ConfigureVideoWindow(this.videoWindow, this.previewWindow);
}
catch (Exception ex)
{
ExceptionMethods.HandleException(ex);
return(false);
}
finally
{
Marshal.ReleaseComObject(bitmapSource);
}
// Grab some other interfaces
this.mediaControl = this.filterGraph as IMediaControl;
}
catch (Exception ex)
{
ExceptionMethods.HandleException(ex);
return(false);
}
finally
{
Marshal.ReleaseComObject(captureGraph);
}
return(true);
}
///////////////////////////////////////////////////////////////////////////////
// Inherited methods //
///////////////////////////////////////////////////////////////////////////////
#region OVERRIDES
#endregion //OVERRIDES
///////////////////////////////////////////////////////////////////////////////
// Eventhandler //
///////////////////////////////////////////////////////////////////////////////
#region EVENTS
///////////////////////////////////////////////////////////////////////////////
// Eventhandler for UI, Menu, Buttons, Toolbars etc. //
///////////////////////////////////////////////////////////////////////////////
#region WINDOWSEVENTHANDLER
#endregion //WINDOWSEVENTHANDLER
///////////////////////////////////////////////////////////////////////////////
// Eventhandler for Custom Defined Events //
///////////////////////////////////////////////////////////////////////////////
#region CUSTOMEVENTHANDLER
#endregion //CUSTOMEVENTHANDLER
#endregion //EVENTS
///////////////////////////////////////////////////////////////////////////////
// Methods and Eventhandling for Background tasks //
///////////////////////////////////////////////////////////////////////////////
#region BACKGROUNDWORKER
#endregion //BACKGROUNDWORKER
///////////////////////////////////////////////////////////////////////////////
// Methods for doing main class job //
///////////////////////////////////////////////////////////////////////////////
#region PRIVATEMETHODS
/// <summary>
/// Build the filter graph
/// </summary>
/// <returns>True if successful, otherwise false.</returns>
private bool SetupGraph()
{
int hr;
// Get the graphbuilder object
this.filterGraph = new FilterGraph() as IFilterGraph2;
// Get a ICaptureGraphBuilder2 to help build the graph
ICaptureGraphBuilder2 captureGraph = (ICaptureGraphBuilder2)new CaptureGraphBuilder2();
try
{
// Link the ICaptureGraphBuilder2 to the IFilterGraph2
hr = captureGraph.SetFiltergraph(this.filterGraph);
DsError.ThrowExceptionForHR(hr);
#if DEBUG
// Allows you to view the graph with GraphEdit File/Connect
this.dsRot = new DsROTEntry(this.filterGraph);
#endif
// Our data source one
IBaseFilter bitmapSource = (IBaseFilter)new GenericSampleSourceFilter();
// Create a DMO Wrapper Filter
IBaseFilter dmoFilter = (IBaseFilter)new DMOWrapperFilter();
IDMOWrapperFilter dmoWrapperFilter = (IDMOWrapperFilter)dmoFilter;
Guid g = this.FindGuid("DmoMixer", DMOCategory.VideoEffect);
hr = dmoWrapperFilter.Init(g, DMOCategory.VideoEffect);
DMOError.ThrowExceptionForHR(hr);
try
{
// Get the pin from the filter so we can configure it
IPin ipin = DsFindPin.ByDirection(bitmapSource, PinDirection.Output, 0);
try
{
// Configure the pin using the provided BitmapInfo
this.ConfigurePusher((IGenericSampleConfig)ipin);
}
catch (Exception ex)
{
ExceptionMethods.HandleException(ex);
return false;
}
finally
{
Marshal.ReleaseComObject(ipin);
}
// Add the bitmap source to the graph
hr = this.filterGraph.AddFilter(bitmapSource, "BitmapSourceFilter");
DsError.ThrowExceptionForHR(hr);
IBaseFilter webcamSource = null;
if (this.videoExportProperties.UserVideoProperties.IsStreamRendered)
{
hr = this.filterGraph.AddSourceFilter(
this.videoExportProperties.UserVideoTempFile,
"WebcamVideoSource",
out webcamSource);
DsError.ThrowExceptionForHR(hr);
}
// Add it to the Graph
hr = this.filterGraph.AddFilter(dmoFilter, "DMO Filter");
DsError.ThrowExceptionForHR(hr);
this.SetDMOParams(dmoFilter, this.videoExportProperties);
// Add the Video compressor filter to the graph
if (this.videoCompressor != null)
{
hr = this.filterGraph.AddFilter(this.videoCompressor, "video compressor filter");
DsError.ThrowExceptionForHR(hr);
}
// Create the file writer part of the graph.
// SetOutputFileName does this for us, and returns the mux and sink
IBaseFilter mux;
IFileSinkFilter sink;
hr = captureGraph.SetOutputFileName(MediaSubType.Avi, this.videoExportProperties.OutputVideoProperties.Filename, out mux, out sink);
DsError.ThrowExceptionForHR(hr);
// Connect the bitmap source to the dmo mixer filter
hr = captureGraph.RenderStream(
null,
null,
bitmapSource,
null,
dmoFilter);
DsError.ThrowExceptionForHR(hr);
// If there is a webcam source connect it to the second input of the dmo mixer
if (webcamSource != null)
{
hr = captureGraph.RenderStream(
null,
null,
webcamSource,
null,
dmoFilter);
DsError.ThrowExceptionForHR(hr);
}
// Create a smart tee filter to enable preview and capture pins
IBaseFilter smartTee = new SmartTee() as IBaseFilter;
// Add the filter to the graph
hr = this.filterGraph.AddFilter(smartTee, "Smart Tee");
DsError.ThrowExceptionForHR(hr);
// Connect the dmo mixer output to the smart tee
hr = captureGraph.RenderStream(
null,
null,
dmoFilter,
null,
smartTee);
DsError.ThrowExceptionForHR(hr);
// Render the smart tee capture pin to the capture part including
// compressor to the file muxer.
hr = captureGraph.RenderStream(
null,
null,
smartTee,
this.videoCompressor,
mux);
DsError.ThrowExceptionForHR(hr);
// Render the smart tee preview pin to the default video renderer
hr = captureGraph.RenderStream(
null,
null,
smartTee,
null,
null);
DsError.ThrowExceptionForHR(hr);
// Configure the Video Window
this.videoWindow = this.filterGraph as IVideoWindow;
this.ConfigureVideoWindow(this.videoWindow, this.previewWindow);
}
catch (Exception ex)
{
ExceptionMethods.HandleException(ex);
return false;
}
finally
{
Marshal.ReleaseComObject(bitmapSource);
}
// Grab some other interfaces
this.mediaControl = this.filterGraph as IMediaControl;
}
catch (Exception ex)
{
ExceptionMethods.HandleException(ex);
return false;
}
finally
{
Marshal.ReleaseComObject(captureGraph);
}
return true;
}
