// Build the capture graph for grabber and renderer.</summary>
// (Control to show video in, Filename to play)
private void SetupGraph(string FileName)
{
int hr;
// Get the graphbuilder object
m_graphBuilder = new DirectShowLib.FilterGraph() as DirectShowLib.IFilterGraph2;
// Get a ICaptureGraphBuilder2 to help build the graph
DirectShowLib.ICaptureGraphBuilder2 icgb2 = new DirectShowLib.CaptureGraphBuilder2() as DirectShowLib.ICaptureGraphBuilder2;
try
{
// Link the ICaptureGraphBuilder2 to the IFilterGraph2
hr = icgb2.SetFiltergraph(m_graphBuilder);
DsError.ThrowExceptionForHR( hr );
#if DEBUG
// Allows you to view the graph with GraphEdit File/Connect
m_DsRot = new DsROTEntry(m_graphBuilder);
#endif
// Add the filters necessary to render the file. This function will
// work with a number of different file types.
IBaseFilter sourceFilter = null;
hr = m_graphBuilder.AddSourceFilter(FileName, FileName, out sourceFilter);
DsError.ThrowExceptionForHR( hr );
// Get the SampleGrabber interface
m_sampGrabber = (DirectShowLib.ISampleGrabber) new DirectShowLib.SampleGrabber();
DirectShowLib.IBaseFilter baseGrabFlt = (DirectShowLib.IBaseFilter) m_sampGrabber;
// Configure the Sample Grabber
ConfigureSampleGrabber(m_sampGrabber);
// Add it to the filter
hr = m_graphBuilder.AddFilter( baseGrabFlt, "Ds.NET Grabber" );
DsError.ThrowExceptionForHR( hr );
// System.Windows.Forms.MessageBox.Show(Width.ToString(), Height.ToString(), System.Windows.Forms.MessageBoxButtons.OK);
// A Null Renderer does not display the video
// But it allows the Sample Grabber to run
// And it will keep proper playback timing
// Unless specified otherwise.
DirectShowLib.NullRenderer nullRenderer = new DirectShowLib.NullRenderer();
m_graphBuilder.AddFilter((DirectShowLib.IBaseFilter) nullRenderer, "Null Renderer");
// Connect the pieces together, use the default renderer
hr = icgb2.RenderStream(null, null, sourceFilter, baseGrabFlt, (DirectShowLib.IBaseFilter) nullRenderer);
DsError.ThrowExceptionForHR( hr );
// Now that the graph is built, read the dimensions of the bitmaps we'll be getting
SaveSizeInfo(m_sampGrabber);
// Configure the Video Window
//DirectShowLib.IVideoWindow videoWindow = m_graphBuilder as DirectShowLib.IVideoWindow;
//ConfigureVideoWindow(videoWindow, hWin);
// Grab some other interfaces
m_mediaEvent = m_graphBuilder as DirectShowLib.IMediaEvent;
m_mediaCtrl = m_graphBuilder as DirectShowLib.IMediaControl;
}
finally
{
if (icgb2 != null)
{
Marshal.ReleaseComObject(icgb2);
icgb2 = null;
}
}
#if DEBUG
// Double check to make sure we aren't releasing something
// important.
GC.Collect();
GC.WaitForPendingFinalizers();
#endif
}
// Build the capture graph for grabber and renderer.</summary>
// (Control to show video in, Filename to play)
private void SetupGraph(string FileName)
{
int hr;
// Get the graphbuilder object
m_graphBuilder = new DirectShowLib.FilterGraph() as DirectShowLib.IFilterGraph2;
// Get a ICaptureGraphBuilder2 to help build the graph
DirectShowLib.ICaptureGraphBuilder2 icgb2 = new DirectShowLib.CaptureGraphBuilder2() as DirectShowLib.ICaptureGraphBuilder2;
try
{
// Link the ICaptureGraphBuilder2 to the IFilterGraph2
hr = icgb2.SetFiltergraph(m_graphBuilder);
DsError.ThrowExceptionForHR(hr);
#if DEBUG
// Allows you to view the graph with GraphEdit File/Connect
m_DsRot = new DsROTEntry(m_graphBuilder);
#endif
// Add the filters necessary to render the file. This function will
// work with a number of different file types.
IBaseFilter sourceFilter = null;
hr = m_graphBuilder.AddSourceFilter(FileName, FileName, out sourceFilter);
DsError.ThrowExceptionForHR(hr);
// Get the SampleGrabber interface
m_sampGrabber = (DirectShowLib.ISampleGrabber) new DirectShowLib.SampleGrabber();
DirectShowLib.IBaseFilter baseGrabFlt = (DirectShowLib.IBaseFilter)m_sampGrabber;
// Configure the Sample Grabber
ConfigureSampleGrabber(m_sampGrabber);
// Add it to the filter
hr = m_graphBuilder.AddFilter(baseGrabFlt, "Ds.NET Grabber");
DsError.ThrowExceptionForHR(hr);
// System.Windows.Forms.MessageBox.Show(Width.ToString(), Height.ToString(), System.Windows.Forms.MessageBoxButtons.OK);
// A Null Renderer does not display the video
// But it allows the Sample Grabber to run
// And it will keep proper playback timing
// Unless specified otherwise.
DirectShowLib.NullRenderer nullRenderer = new DirectShowLib.NullRenderer();
m_graphBuilder.AddFilter((DirectShowLib.IBaseFilter)nullRenderer, "Null Renderer");
// Connect the pieces together, use the default renderer
hr = icgb2.RenderStream(null, null, sourceFilter, baseGrabFlt, (DirectShowLib.IBaseFilter)nullRenderer);
DsError.ThrowExceptionForHR(hr);
// Now that the graph is built, read the dimensions of the bitmaps we'll be getting
SaveSizeInfo(m_sampGrabber);
// Configure the Video Window
//DirectShowLib.IVideoWindow videoWindow = m_graphBuilder as DirectShowLib.IVideoWindow;
//ConfigureVideoWindow(videoWindow, hWin);
// Grab some other interfaces
m_mediaEvent = m_graphBuilder as DirectShowLib.IMediaEvent;
m_mediaCtrl = m_graphBuilder as DirectShowLib.IMediaControl;
}
finally
{
if (icgb2 != null)
{
Marshal.ReleaseComObject(icgb2);
icgb2 = null;
}
}
#if DEBUG
// Double check to make sure we aren't releasing something
// important.
GC.Collect();
GC.WaitForPendingFinalizers();
#endif
}