public frmVideoSettings(VideoCapability vc, frmAVDevices frmAV)
{
InitializeComponent();
Debug.Assert(vc != null);
Debug.Assert(vc.VideoCaptureGraph != null);
Debug.Assert(frmAV != null);
this.vc = vc;
this.vcg = vc.VideoCaptureGraph;
this.frmAV = frmAV;
}
private void cklbCameras_ItemCheck(object sender, System.Windows.Forms.ItemCheckEventArgs e)
{
if(e.NewValue == CheckState.Checked)
{
// We only support one device at a time for this sample
UncheckAllDevices();
// CF1 Select camera
// CF2 Initialize - Create filter and internal graph
vcg = new VideoCaptureGraph((FilterInfo)cklbCameras.SelectedItem);
vcg.RenderLocal(); // CF3 Connect all the filters
VideoWindow(); // CF4 Set video window (if you like)
vcg.Run(); // CF5 Start graph -> Show video
}
else // Unchecked
{
Cleanup();
}
}
/// <summary>
/// Creates the actual FilgraphManager with the chosen camera
/// </summary>
private void CreateVideoGraph(FilterInfo fi)
{
Debug.Assert(vcg == null);
// Create the graph, which creates the source filter
cg = new VideoCaptureGraph(fi);
Log(vcg.VideoSource.Dump());
}
// CF2
private void DisposeDevice()
{
if(vcg != null)
{
vcg.Stop();
vcg.Dispose();
vcg = null;
}
}
// CF2 (with some changes for network)
private void cklbCameras_ItemCheck(object sender, System.Windows.Forms.ItemCheckEventArgs e)
{
if(e.NewValue == CheckState.Checked)
{
UncheckAllDevices();
vcg = new VideoCaptureGraph((FilterInfo)cklbCameras.SelectedItem); // Create filter and internal graph
vcg.RenderNetwork(rtpSender); // Add network filter, connect all filters
vcg.Run(); // Send data to network
}
else // Unchecked
{
DisposeDevice();
}
}
private void Cleanup()
{
if(vcg != null)
{
vcg.Dispose(); // CF6 Dispose device when done (clean up internal filtergraph)
vcg = null;
// This shouldn't be necessary, but there seems to be some kind
// of outstanding reference count that is taken care of here
GC.Collect();
}
}
/// <summary>
/// Creates the actual FilgraphManager with the chosen camera
/// </summary>
private void CreateVideoGraph(FilterInfo fi)
{
Debug.Assert(cg == null);
// Create the graph, which creates the source filter
if (DVSource.IsDVSourceWithAudio(fi)) {
cg = DVCaptureGraph.GetInstance(fi);
Log(((DVCaptureGraph)cg).VideoSource.Dump());
}
else {
cg = new VideoCaptureGraph(fi);
Log(((VideoCaptureGraph)cg).VideoSource.Dump());
}
}
private void DeactivateVideoCapability(FilterInfo fi)
{
RenderAndRunVideo(vcg, false);
vcg = null;
VideoCapability vc = (VideoCapability)vcs[fi];
vcs.Remove(fi);
vc.DeactivateCamera();
}
// CF2 (with some changes for network)
private void cklbCameras_ItemCheck(object sender, System.Windows.Forms.ItemCheckEventArgs e)
{
if(e.NewValue == CheckState.Checked)
{
UncheckAllDevices();
// Create the graph for the device
vcg = new VideoCaptureGraph((FilterInfo)cklbCameras.SelectedItem);
// Add a compressor and configure it
vcg.AddCompressor(VideoCompressor.DefaultFilterInfo());
vcg.VideoCompressor.QualityInfo = VideoCompressor.DefaultQualityInfo;
// Add network filter
vcg.RenderNetwork(rtpSender);
// Send data to network
vcg.Run();
}
else // Unchecked
{
DisposeDevice();
}
}
private void clbCameras_SelectedIndexChanged(object sender, System.EventArgs e)
{
try
{
ClearVideoBox();
vc = (VideoCapability)vcs[(FilterInfo)clbCameras.SelectedItem];
vcg = vc != null ? vc.VideoCaptureGraph : null;
if(clbCameras.GetItemChecked(clbCameras.SelectedIndex))
{
UpdateVideoBox();
}
}
catch(COMException ex)
{
Log(DShowError._AMGetErrorText(ex.ErrorCode));
Log(ex.ToString());
}
catch(Exception ex)
{
Log(ex.ToString());
}
}
private void ActivateVideoCapability(FilterInfo fi)
{
Debug.Assert(!vcs.Contains(fi));
vc = new VideoCapability(fi);
vcs.Add(fi, vc);
vc.SetLogger(new AVLogger(Log));
vc.ActivateCamera();
vcg = vc.VideoCaptureGraph;
RenderAndRunVideo(vcg);
}
public void RenderAndRunVideo(VideoCaptureGraph vcg, bool playIt)
{
if(playIt)
{
Log("Playing video (render and run graph) - " + vcg.Source.FriendlyName);
vcg.RenderLocal();
VideoCapability.DisableDXVA(vcg.FilgraphManager);
// Set device name in the video window and turn off the system menu
IVideoWindow iVW = (IVideoWindow)vcg.FilgraphManager;
iVW.Caption = vcg.Source.FriendlyName;
iVW.WindowStyle &= ~0x00080000; // WS_SYSMENU
vcg.Run();
}
else
{
Log("Stop video (stop and unrender graph) - " + vcg.Source.FriendlyName);
vcg.Stop();
vcg.RemoveRenderer();
// I have no idea why the video window stays up but this fixes it
GC.Collect();
}
Log(FilterGraph.Debug(vcg.IFilterGraph));
}
public void RenderAndRunVideo(VideoCaptureGraph vcg)
{
RenderAndRunVideo(vcg, ckPlayVideo.Checked);
}
private void MDShowInteropForm_Load(object sender, System.EventArgs e)
{
this.Text = Strings.DirectShowSample;
// CF1 Add video devices to UI
foreach (FilterInfo fi in VideoSource.Sources())
{
cklbCameras.Items.Add(fi);
}
vcg = new VideoCaptureGraph(VideoSource.Sources()[0]);
vcg.RenderLocal(); // CF3 Connect all the filters
VideoWindow(); // CF4 Set video window (if you like)
vcg.Run();
}
