void BuildGraph()
{
int hr;
IBaseFilter ppFilter;
DsDevice [] devs;
IGraphBuilder graphBuilder = new FilterGraph() as IGraphBuilder;
m_ROT = new DsROTEntry(graphBuilder);
IFilterGraph2 ifg2 = graphBuilder as IFilterGraph2;
devs = DsDevice.GetDevicesOfCat(FilterCategory.VideoInputDevice);
DsDevice dev = devs[0];
hr = ifg2.AddSourceFilterForMoniker(dev.Mon, null, dev.Name, out ppFilter);
DsError.ThrowExceptionForHR(hr);
m_ivc = ppFilter as IAMVideoControl;
m_IPinOut = DsFindPin.ByDirection(ppFilter, PinDirection.Output, 0);
hr = ifg2.Render(m_IPinOut);
DsError.ThrowExceptionForHR(hr);
m_imc = graphBuilder as IMediaControl;
//hr = m_imc.Run();
DsError.ThrowExceptionForHR(hr);
}
/// <summary> Shut down capture </summary>
private void CloseInterfaces()
{
int hr;
try
{
if (m_FilterGraph != null)
{
IMediaControl mediaCtrl = m_FilterGraph as IMediaControl;
// Stop the graph
hr = mediaCtrl.Stop();
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
if (m_FilterGraph != null)
{
Marshal.ReleaseComObject(m_FilterGraph);
m_FilterGraph = null;
}
if (m_VidControl != null)
{
Marshal.ReleaseComObject(m_VidControl);
m_VidControl = null;
}
if (m_pinStill != null)
{
Marshal.ReleaseComObject(m_pinStill);
m_pinStill = null;
}
}
/// <summary>
/// Set the Framerate, and video size
/// </summary>
/// <param name="capGraph">The <see cref="ICaptureGraphBuilder2"/> interface.</param>
/// <param name="capFilter">The <see cref="IBaseFilter"/> of the capture device.</param>
/// <param name="frameRate">The new framerate to be used.</param>
/// <param name="width">The new video width to be used.</param>
/// <param name="height">The new video height to be used.</param>
private void SetConfigParms(ICaptureGraphBuilder2 capGraph, IBaseFilter capFilter, int frameRate, int width, int height)
{
int hr;
object o;
AMMediaType media;
// Find the stream config interface
hr = this.capGraph.FindInterface(PinCategory.Capture, MediaType.Video, capFilter, typeof(IAMStreamConfig).GUID, out o);
this.videoControl = capFilter as IAMVideoControl;
this.videoStreamConfig = o as IAMStreamConfig;
if (this.videoStreamConfig == null)
{
ErrorLogger.WriteLine("Error in Capture.SetConfigParams(). Failed to get IAMStreamConfig");
}
// Get the existing format block
hr = this.videoStreamConfig.GetFormat(out media);
if (hr != 0)
{
ErrorLogger.WriteLine("Could not SetConfigParms in Camera.Capture. Message: " + DsError.GetErrorText(hr));
}
// copy out the videoinfoheader
VideoInfoHeader v = new VideoInfoHeader();
Marshal.PtrToStructure(media.formatPtr, v);
// if overriding set values
if (frameRate > 0)
{
v.AvgTimePerFrame = 10000000 / frameRate;
}
if (width > 0)
{
v.BmiHeader.Width = width;
}
if (height > 0)
{
v.BmiHeader.Height = height;
}
// Copy the media structure back
Marshal.StructureToPtr(v, media.formatPtr, true);
// Set the new format
hr = this.videoStreamConfig.SetFormat(media);
if (hr != 0)
{
ErrorLogger.WriteLine("Error while setting new camera format (videoStreamConfig) in Camera.Capture. Message: " + DsError.GetErrorText(hr));
}
DsUtils.FreeAMMediaType(media);
media = null;
}
/**
* 必要に応じてグラフオブジェクトを全て削除する。
*/
private void CleanupGraphiObjects()
{
this.m_video_info = null;
if (m_FilterGraph != null)
{
Marshal.ReleaseComObject(m_FilterGraph);
m_FilterGraph = null;
}
if (m_VidControl != null)
{
Marshal.ReleaseComObject(m_VidControl);
m_VidControl = null;
}
if (m_pinStill != null)
{
Marshal.ReleaseComObject(m_pinStill);
m_pinStill = null;
}
}
void BuildGraph()
{
int hr;
IBaseFilter ppFilter;
DsDevice [] devs;
IGraphBuilder graphBuilder = new FilterGraph() as IGraphBuilder;
m_ROT = new DsROTEntry(graphBuilder);
IFilterGraph2 ifg2 = graphBuilder as IFilterGraph2;
devs = DsDevice.GetDevicesOfCat(FilterCategory.VideoInputDevice);
DsDevice dev = devs[0];
hr = ifg2.AddSourceFilterForMoniker(dev.Mon, null, dev.Name, out ppFilter);
DsError.ThrowExceptionForHR(hr);
m_ivc = ppFilter as IAMVideoControl;
m_IPinOut = DsFindPin.ByDirection(ppFilter, PinDirection.Output, 0);
hr = ifg2.Render(m_IPinOut);
DsError.ThrowExceptionForHR(hr);
ICaptureGraphBuilder2 captureGraphBuilder = new CaptureGraphBuilder2() as ICaptureGraphBuilder2;
hr = captureGraphBuilder.SetFiltergraph(graphBuilder);
object o;
hr = captureGraphBuilder.FindInterface(null, null, ppFilter, typeof(IAMAnalogVideoDecoder).GUID, out o);
DsError.ThrowExceptionForHR(hr);
m_avd = o as IAMAnalogVideoDecoder;
m_imc = graphBuilder as IMediaControl;
hr = m_imc.Run();
DsError.ThrowExceptionForHR(hr);
}
public static void FixFlippedVideo(IAMVideoControl videoControl, IPin pPin)
{
VideoControlFlags pCapsFlags;
int hr = videoControl.GetCaps(pPin, out pCapsFlags);
DsError.ThrowExceptionForHR(hr);
if ((pCapsFlags & VideoControlFlags.FlipVertical) > 0)
{
hr = videoControl.GetMode(pPin, out pCapsFlags);
DsError.ThrowExceptionForHR(hr);
hr = videoControl.SetMode(pPin, pCapsFlags & ~VideoControlFlags.FlipVertical);
DsError.ThrowExceptionForHR(hr);
PinInfo pinInfo;
hr = pPin.QueryPinInfo(out pinInfo);
DsError.ThrowExceptionForHR(hr);
Trace.WriteLine("Fixing 'FlipVertical' video for pin " + pinInfo.name);
}
if ((pCapsFlags & VideoControlFlags.FlipHorizontal) > 0)
{
hr = videoControl.GetMode(pPin, out pCapsFlags);
DsError.ThrowExceptionForHR(hr);
hr = videoControl.SetMode(pPin, pCapsFlags | VideoControlFlags.FlipHorizontal);
DsError.ThrowExceptionForHR(hr);
PinInfo pinInfo;
hr = pPin.QueryPinInfo(out pinInfo);
DsError.ThrowExceptionForHR(hr);
Trace.WriteLine("Fixing 'FlipHorizontal' video for pin " + pinInfo.name);
}
}
public static void FixFlippedVideo(IAMVideoControl videoControl, IPin pPin)
{
VideoControlFlags pCapsFlags;
int hr = videoControl.GetCaps(pPin, out pCapsFlags);
DsError.ThrowExceptionForHR(hr);
if ((pCapsFlags & VideoControlFlags.FlipVertical) > 0)
{
hr = videoControl.GetMode(pPin, out pCapsFlags);
DsError.ThrowExceptionForHR(hr);
hr = videoControl.SetMode(pPin, pCapsFlags & ~VideoControlFlags.FlipVertical);
DsError.ThrowExceptionForHR(hr);
PinInfo pinInfo;
hr = pPin.QueryPinInfo(out pinInfo);
DsError.ThrowExceptionForHR(hr);
Trace.WriteLine("Fixing 'FlipVertical' video for pin " + pinInfo.name);
}
if ((pCapsFlags & VideoControlFlags.FlipHorizontal) > 0)
{
hr = videoControl.GetMode(pPin, out pCapsFlags);
DsError.ThrowExceptionForHR(hr);
hr = videoControl.SetMode(pPin, pCapsFlags | VideoControlFlags.FlipHorizontal);
DsError.ThrowExceptionForHR(hr);
PinInfo pinInfo;
hr = pPin.QueryPinInfo(out pinInfo);
DsError.ThrowExceptionForHR(hr);
Trace.WriteLine("Fixing 'FlipHorizontal' video for pin " + pinInfo.name);
}
}
public override void Cleanup()
{
try
{
// To stop the capture filter before stopping the media control
// seems to solve the problem described in the next comment.
// sancta simplicitas...
if (capFilter != null)
{
capFilter.Stop();
}
// The stop or stopwhenready methods sometimes hang ...
// This is a multithreading issue but I don´t solved it yet
// But stopping is needed, otherwise the video device
// is not disposed fast enough (due to GC) so at next initialization
// with other params the video device seems to be in
// use and the GraphBuilder render mehtod fails.
if (mediaControl != null)
{
// This hangs when closing the GT
int hr = mediaControl.Stop();
}
isRunning = false;
}
catch (Exception ex)
{
//ErrorLogger.ProcessException(ex, false);
Console.WriteLine("ERROR! " + ex.ToString());
MessageBox.Show(ex.Message);
}
if (capFilter != null)
{
Marshal.ReleaseComObject(capFilter);
capFilter = null;
cameraControl = null;
videoControl = null;
videoStreamConfig = null;
}
if (videoProcAmp != null)
{
Marshal.ReleaseComObject(videoProcAmp);
videoProcAmp = null;
}
if (sampGrabber != null)
{
Marshal.ReleaseComObject(sampGrabber);
sampGrabber = null;
}
if (graphBuilder != null)
{
Marshal.ReleaseComObject(graphBuilder);
graphBuilder = null;
mediaControl = null;
hasValidGraph = false;
}
if (capGraph != null)
{
Marshal.ReleaseComObject(capGraph);
capGraph = null;
}
if (map != IntPtr.Zero)
{
UnmapViewOfFile(map);
map = IntPtr.Zero;
}
if (section != IntPtr.Zero)
{
CloseHandle(section);
section = IntPtr.Zero;
}
#if DEBUG
if (this.rotEntry != null)
{
// This hangs when closing the GT
this.rotEntry.Dispose();
}
#endif
}
/// <summary> Shut down capture </summary>
private void CloseInterfaces()
{
int hr;
try
{
if (m_FilterGraph != null)
{
IMediaControl mediaCtrl = m_FilterGraph as IMediaControl;
// Stop the graph
hr = mediaCtrl.Stop();
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
if (m_FilterGraph != null)
{
Marshal.ReleaseComObject(m_FilterGraph);
m_FilterGraph = null;
}
if (m_VidControl != null)
{
Marshal.ReleaseComObject(m_VidControl);
m_VidControl = null;
}
if (m_pinStill != null)
{
Marshal.ReleaseComObject(m_pinStill);
m_pinStill = null;
}
}
private void WorkerThread(bool runGraph)
{
ReasonToFinishPlaying reasonToStop = ReasonToFinishPlaying.StoppedByUser;
bool isSapshotSupported = false;
Grabber videoGrabber = new Grabber(this, false);
Grabber snapshotGrabber = new Grabber(this, true);
object captureGraphObject = null;
object graphObject = null;
object videoGrabberObject = null;
object snapshotGrabberObject = null;
object crossbarObject = null;
ICaptureGraphBuilder2 captureGraph = null;
IFilterGraph2 graph = null;
IBaseFilter sourceBase = null;
IBaseFilter videoGrabberBase = null;
IBaseFilter snapshotGrabberBase = null;
ISampleGrabber videoSampleGrabber = null;
ISampleGrabber snapshotSampleGrabber = null;
IMediaControl mediaControl = null;
IAMVideoControl videoControl = null;
IMediaEventEx mediaEvent = null;
IPin pinStillImage = null;
IAMCrossbar crossbar = null;
try
{
Type type = Type.GetTypeFromCLSID(Clsid.CaptureGraphBuilder2);
if (type == null)
{
throw new ApplicationException("Failed creating capture graph builder");
}
captureGraphObject = Activator.CreateInstance(type);
captureGraph = (ICaptureGraphBuilder2)captureGraphObject;
type = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (type == null)
{
throw new ApplicationException("Failed creating filter graph");
}
graphObject = Activator.CreateInstance(type);
graph = (IFilterGraph2)graphObject;
captureGraph.SetFiltergraph((IGraphBuilder)graph);
sourceObject = FilterInfo.CreateFilter(deviceMoniker);
if (sourceObject == null)
{
throw new ApplicationException("Failed creating device object for moniker");
}
sourceBase = (IBaseFilter)sourceObject;
try
{
videoControl = (IAMVideoControl)sourceObject;
}
catch
{
}
type = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (type == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
videoGrabberObject = Activator.CreateInstance(type);
videoSampleGrabber = (ISampleGrabber)videoGrabberObject;
videoGrabberBase = (IBaseFilter)videoGrabberObject;
snapshotGrabberObject = Activator.CreateInstance(type);
snapshotSampleGrabber = (ISampleGrabber)snapshotGrabberObject;
snapshotGrabberBase = (IBaseFilter)snapshotGrabberObject;
graph.AddFilter(sourceBase, "source");
graph.AddFilter(videoGrabberBase, "grabber_video");
graph.AddFilter(snapshotGrabberBase, "grabber_snapshot");
AMMediaType mediaType = new AMMediaType( );
mediaType.MajorType = MediaType.Video;
mediaType.SubType = MediaSubType.RGB24;
videoSampleGrabber.SetMediaType(mediaType);
snapshotSampleGrabber.SetMediaType(mediaType);
captureGraph.FindInterface(FindDirection.UpstreamOnly, Guid.Empty, sourceBase, typeof(IAMCrossbar).GUID, out crossbarObject);
if (crossbarObject != null)
{
crossbar = (IAMCrossbar)crossbarObject;
}
isCrossbarAvailable = (crossbar != null);
crossbarVideoInputs = ColletCrossbarVideoInputs(crossbar);
if (videoControl != null)
{
captureGraph.FindPin(sourceObject, PinDirection.Output,
PinCategory.StillImage, MediaType.Video, false, 0, out pinStillImage);
if (pinStillImage != null)
{
VideoControlFlags caps;
videoControl.GetCaps(pinStillImage, out caps);
isSapshotSupported = ((caps & VideoControlFlags.ExternalTriggerEnable) != 0);
}
}
videoSampleGrabber.SetBufferSamples(false);
videoSampleGrabber.SetOneShot(false);
videoSampleGrabber.SetCallback(videoGrabber, 1);
snapshotSampleGrabber.SetBufferSamples(true);
snapshotSampleGrabber.SetOneShot(false);
snapshotSampleGrabber.SetCallback(snapshotGrabber, 1);
GetPinCapabilitiesAndConfigureSizeAndRate(captureGraph, sourceBase,
PinCategory.Capture, videoResolution, ref videoCapabilities);
if (isSapshotSupported)
{
GetPinCapabilitiesAndConfigureSizeAndRate(captureGraph, sourceBase,
PinCategory.StillImage, snapshotResolution, ref snapshotCapabilities);
}
else
{
snapshotCapabilities = new VideoCapabilities[0];
}
lock ( cacheVideoCapabilities )
{
if ((videoCapabilities != null) && (!cacheVideoCapabilities.ContainsKey(deviceMoniker)))
{
cacheVideoCapabilities.Add(deviceMoniker, videoCapabilities);
}
}
lock ( cacheSnapshotCapabilities )
{
if ((snapshotCapabilities != null) && (!cacheSnapshotCapabilities.ContainsKey(deviceMoniker)))
{
cacheSnapshotCapabilities.Add(deviceMoniker, snapshotCapabilities);
}
}
if (runGraph)
{
captureGraph.RenderStream(PinCategory.Capture, MediaType.Video, sourceBase, null, videoGrabberBase);
if (videoSampleGrabber.GetConnectedMediaType(mediaType) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
videoGrabber.Width = vih.BmiHeader.Width;
videoGrabber.Height = vih.BmiHeader.Height;
mediaType.Dispose( );
}
if ((isSapshotSupported) && (provideSnapshots))
{
captureGraph.RenderStream(PinCategory.StillImage, MediaType.Video, sourceBase, null, snapshotGrabberBase);
if (snapshotSampleGrabber.GetConnectedMediaType(mediaType) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
snapshotGrabber.Width = vih.BmiHeader.Width;
snapshotGrabber.Height = vih.BmiHeader.Height;
mediaType.Dispose( );
}
}
mediaControl = (IMediaControl)graphObject;
mediaEvent = (IMediaEventEx)graphObject;
IntPtr p1, p2;
DsEvCode code;
mediaControl.Run( );
if ((isSapshotSupported) && (provideSnapshots))
{
startTime = DateTime.Now;
videoControl.SetMode(pinStillImage, VideoControlFlags.ExternalTriggerEnable);
}
do
{
if (mediaEvent != null)
{
if (mediaEvent.GetEvent(out code, out p1, out p2, 0) >= 0)
{
mediaEvent.FreeEventParams(code, p1, p2);
if (code == DsEvCode.DeviceLost)
{
reasonToStop = ReasonToFinishPlaying.DeviceLost;
break;
}
}
}
if (needToSetVideoInput)
{
needToSetVideoInput = false;
if (isCrossbarAvailable.Value)
{
SetCurrentCrossbarInput(crossbar, crossbarVideoInput);
crossbarVideoInput = GetCurrentCrossbarInput(crossbar);
}
}
if (needToSimulateTrigger)
{
needToSimulateTrigger = false;
if ((isSapshotSupported) && (provideSnapshots))
{
videoControl.SetMode(pinStillImage, VideoControlFlags.Trigger);
}
}
if (needToDisplayPropertyPage)
{
needToDisplayPropertyPage = false;
DisplayPropertyPage(parentWindowForPropertyPage, sourceObject);
if (crossbar != null)
{
crossbarVideoInput = GetCurrentCrossbarInput(crossbar);
}
}
if (needToDisplayCrossBarPropertyPage)
{
needToDisplayCrossBarPropertyPage = false;
if (crossbar != null)
{
DisplayPropertyPage(parentWindowForPropertyPage, crossbar);
crossbarVideoInput = GetCurrentCrossbarInput(crossbar);
}
}
}while (!stopEvent.WaitOne(100, false));
mediaControl.Stop( );
}
}
catch (Exception exception)
{
if (VideoSourceError != null)
{
VideoSourceError(this, new VideoSourceErrorEventArgs(exception.Message));
}
}
finally
{
captureGraph = null;
graph = null;
sourceBase = null;
mediaControl = null;
videoControl = null;
mediaEvent = null;
pinStillImage = null;
crossbar = null;
videoGrabberBase = null;
snapshotGrabberBase = null;
videoSampleGrabber = null;
snapshotSampleGrabber = null;
if (graphObject != null)
{
Marshal.ReleaseComObject(graphObject);
graphObject = null;
}
if (sourceObject != null)
{
Marshal.ReleaseComObject(sourceObject);
sourceObject = null;
}
if (videoGrabberObject != null)
{
Marshal.ReleaseComObject(videoGrabberObject);
videoGrabberObject = null;
}
if (snapshotGrabberObject != null)
{
Marshal.ReleaseComObject(snapshotGrabberObject);
snapshotGrabberObject = null;
}
if (captureGraphObject != null)
{
Marshal.ReleaseComObject(captureGraphObject);
captureGraphObject = null;
}
if (crossbarObject != null)
{
Marshal.ReleaseComObject(crossbarObject);
crossbarObject = null;
}
}
if (PlayingFinished != null)
{
PlayingFinished(this, reasonToStop);
}
}
private static void DoSupportedVideoFormatsOperation(string deviceName, SupportedVideoFormatCallback callback)
{
IGraphBuilder graphBuilder = null;
ICaptureGraphBuilder2 captureGraphBuilder = null;
IBaseFilter theDevice = null;
try
{
graphBuilder = (IGraphBuilder) new FilterGraph();
captureGraphBuilder = (ICaptureGraphBuilder2) new CaptureGraphBuilder2();
theDevice = CreateFilter(FilterCategory.VideoInputDevice, deviceName);
// Attach the filter graph to the capture graph
int hr = captureGraphBuilder.SetFiltergraph(graphBuilder);
DsError.ThrowExceptionForHR(hr);
// Add the Video input device to the graph
hr = graphBuilder.AddFilter(theDevice, "source filter");
DsError.ThrowExceptionForHR(hr);
object o;
// AMMediaType media;
IAMStreamConfig videoStreamConfig;
IAMVideoControl videoControl = theDevice as IAMVideoControl;
hr = captureGraphBuilder.FindInterface(PinCategory.Capture, MediaType.Video, theDevice, typeof(IAMStreamConfig).GUID, out o);
DsError.ThrowExceptionForHR(hr);
videoStreamConfig = o as IAMStreamConfig;
try
{
if (videoStreamConfig == null)
{
throw new Exception("Failed to get IAMStreamConfig");
}
int iCount = 0, iSize = 0;
videoStreamConfig.GetNumberOfCapabilities(out iCount, out iSize);
IntPtr taskMemPointer = Marshal.AllocCoTaskMem(iSize);
AMMediaType pmtConfig = null;
for (int iFormat = 0; iFormat < iCount; iFormat++)
{
IntPtr ptr = IntPtr.Zero;
videoStreamConfig.GetStreamCaps(iFormat, out pmtConfig, taskMemPointer);
var v2 = (VideoInfoHeader)Marshal.PtrToStructure(pmtConfig.formatPtr, typeof(VideoInfoHeader));
if (v2.BmiHeader.BitCount > 0)
{
var entry = new SupportedVideoFormat()
{
Width = v2.BmiHeader.Width,
Height = v2.BmiHeader.Height,
BitCount = v2.BmiHeader.BitCount,
FrameRate = 10000000.0 / v2.AvgTimePerFrame
};
callback(entry);
Trace.WriteLine(entry.AsSerialized());
}
}
Marshal.FreeCoTaskMem(taskMemPointer);
DsUtils.FreeAMMediaType(pmtConfig);
}
finally
{
Marshal.ReleaseComObject(videoStreamConfig);
}
}
finally
{
if (theDevice != null)
{
Marshal.ReleaseComObject(theDevice);
}
if (graphBuilder != null)
{
Marshal.ReleaseComObject(graphBuilder);
}
if (captureGraphBuilder != null)
{
Marshal.ReleaseComObject(captureGraphBuilder);
}
}
}
// Token: 0x0600003F RID: 63 RVA: 0x00002D24 File Offset: 0x00000F24
private void WorkerThread(bool runGraph)
{
ReasonToFinishPlaying reason = ReasonToFinishPlaying.StoppedByUser;
bool flag = false;
VideoCaptureDevice.Grabber grabber = new VideoCaptureDevice.Grabber(this, false);
VideoCaptureDevice.Grabber grabber2 = new VideoCaptureDevice.Grabber(this, true);
object obj = null;
object obj2 = null;
object obj3 = null;
object obj4 = null;
object obj5 = null;
ICaptureGraphBuilder2 captureGraphBuilder = null;
IFilterGraph2 filterGraph = null;
IBaseFilter baseFilter = null;
IBaseFilter baseFilter2 = null;
IBaseFilter baseFilter3 = null;
ISampleGrabber sampleGrabber = null;
ISampleGrabber sampleGrabber2 = null;
IAMVideoControl iamvideoControl = null;
IPin pin = null;
IAMCrossbar iamcrossbar = null;
try
{
Type typeFromCLSID = Type.GetTypeFromCLSID(Clsid.CaptureGraphBuilder2);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating capture graph builder");
}
obj = Activator.CreateInstance(typeFromCLSID);
captureGraphBuilder = (ICaptureGraphBuilder2)obj;
Type typeFromCLSID2 = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (typeFromCLSID2 == null)
{
throw new ApplicationException("Failed creating filter graph");
}
obj2 = Activator.CreateInstance(typeFromCLSID2);
filterGraph = (IFilterGraph2)obj2;
captureGraphBuilder.SetFiltergraph((IGraphBuilder)filterGraph);
this.sourceObject1 = FilterInfo.CreateFilter(this.deviceMoniker1);
if (this.sourceObject1 == null)
{
throw new ApplicationException("Failed creating device object for moniker");
}
baseFilter = (IBaseFilter)this.sourceObject1;
try
{
iamvideoControl = (IAMVideoControl)this.sourceObject1;
}
catch
{
}
Type typeFromCLSID3 = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (typeFromCLSID3 == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
obj3 = Activator.CreateInstance(typeFromCLSID3);
sampleGrabber = (ISampleGrabber)obj3;
baseFilter2 = (IBaseFilter)obj3;
obj4 = Activator.CreateInstance(typeFromCLSID3);
sampleGrabber2 = (ISampleGrabber)obj4;
baseFilter3 = (IBaseFilter)obj4;
filterGraph.AddFilter(baseFilter, "source");
filterGraph.AddFilter(baseFilter2, "grabber_video");
filterGraph.AddFilter(baseFilter3, "grabber_snapshot");
AMMediaType ammediaType = new AMMediaType();
ammediaType.MajorType = MediaType.Video1;
ammediaType.SubType = MediaSubType.RGB24;
sampleGrabber.SetMediaType(ammediaType);
sampleGrabber2.SetMediaType(ammediaType);
captureGraphBuilder.FindInterface(FindDirection.UpstreamOnly, Guid.Empty, baseFilter, typeof(IAMCrossbar).GUID, out obj5);
if (obj5 != null)
{
iamcrossbar = (IAMCrossbar)obj5;
}
this.isCrossbarAvailable1 = new bool?(iamcrossbar != null);
this.crossbarVideoInputs1 = this.ColletCrossbarVideoInputs(iamcrossbar);
if (iamvideoControl != null)
{
captureGraphBuilder.FindPin(this.sourceObject1, PinDirection.Output, PinCategory.StillImage, MediaType.Video1, false, 0, out pin);
if (pin != null)
{
VideoControlFlags videoControlFlags;
iamvideoControl.GetCaps(pin, out videoControlFlags);
flag = ((videoControlFlags & VideoControlFlags.ExternalTriggerEnable) > (VideoControlFlags)0);
}
}
sampleGrabber.SetBufferSamples(false);
sampleGrabber.SetOneShot(false);
sampleGrabber.SetCallback(grabber, 1);
sampleGrabber2.SetBufferSamples(true);
sampleGrabber2.SetOneShot(false);
sampleGrabber2.SetCallback(grabber2, 1);
this.GetPinCapabilitiesAndConfigureSizeAndRate(captureGraphBuilder, baseFilter, PinCategory.Capture, this.videoResolution1, ref this.videoCapabilities1);
if (flag)
{
this.GetPinCapabilitiesAndConfigureSizeAndRate(captureGraphBuilder, baseFilter, PinCategory.StillImage, this.snapshotResolution1, ref this.snapshotCapabilities1);
}
else
{
this.snapshotCapabilities1 = new VideoCapabilities[0];
}
Dictionary <string, VideoCapabilities[]> obj6 = VideoCaptureDevice.cacheVideoCapabilities1;
lock (obj6)
{
if (this.videoCapabilities1 != null && !VideoCaptureDevice.cacheVideoCapabilities1.ContainsKey(this.deviceMoniker1))
{
VideoCaptureDevice.cacheVideoCapabilities1.Add(this.deviceMoniker1, this.videoCapabilities1);
}
}
obj6 = VideoCaptureDevice.cacheSnapshotCapabilities1;
lock (obj6)
{
if (this.snapshotCapabilities1 != null && !VideoCaptureDevice.cacheSnapshotCapabilities1.ContainsKey(this.deviceMoniker1))
{
VideoCaptureDevice.cacheSnapshotCapabilities1.Add(this.deviceMoniker1, this.snapshotCapabilities1);
}
}
if (runGraph)
{
captureGraphBuilder.RenderStream(PinCategory.Capture, MediaType.Video1, baseFilter, null, baseFilter2);
if (sampleGrabber.GetConnectedMediaType(ammediaType) == 0)
{
VideoInfoHeader videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(ammediaType.FormatPtr, typeof(VideoInfoHeader));
grabber.Width = videoInfoHeader.BmiHeader.Width;
grabber.Height = videoInfoHeader.BmiHeader.Height;
ammediaType.Dispose();
}
if (flag && this.provideSnapshots1)
{
captureGraphBuilder.RenderStream(PinCategory.StillImage, MediaType.Video1, baseFilter, null, baseFilter3);
if (sampleGrabber2.GetConnectedMediaType(ammediaType) == 0)
{
VideoInfoHeader videoInfoHeader2 = (VideoInfoHeader)Marshal.PtrToStructure(ammediaType.FormatPtr, typeof(VideoInfoHeader));
grabber2.Width = videoInfoHeader2.BmiHeader.Width;
grabber2.Height = videoInfoHeader2.BmiHeader.Height;
ammediaType.Dispose();
}
}
IMediaControl mediaControl = (IMediaControl)obj2;
IMediaEventEx mediaEventEx = (IMediaEventEx)obj2;
mediaControl.Run();
if (flag && this.provideSnapshots1)
{
this.startTime1 = DateTime.Now;
iamvideoControl.SetMode(pin, VideoControlFlags.ExternalTriggerEnable);
}
for (;;)
{
DsEvCode dsEvCode;
IntPtr lParam;
IntPtr lParam2;
if (mediaEventEx != null && mediaEventEx.GetEvent(out dsEvCode, out lParam, out lParam2, 0) >= 0)
{
mediaEventEx.FreeEventParams(dsEvCode, lParam, lParam2);
if (dsEvCode == DsEvCode.DeviceLost)
{
break;
}
}
if (this.needToSetVideoInput1)
{
this.needToSetVideoInput1 = false;
if (this.isCrossbarAvailable1.Value)
{
this.SetCurrentCrossbarInput(iamcrossbar, this.crossbarVideoInput1);
this.crossbarVideoInput1 = this.GetCurrentCrossbarInput(iamcrossbar);
}
}
if (this.needToSimulateTrigger1)
{
this.needToSimulateTrigger1 = false;
if (flag && this.provideSnapshots1)
{
iamvideoControl.SetMode(pin, VideoControlFlags.Trigger);
}
}
if (this.needToDisplayPropertyPage1)
{
this.needToDisplayPropertyPage1 = false;
this.DisplayPropertyPage(this.parentWindowForPropertyPage1, this.sourceObject1);
if (iamcrossbar != null)
{
this.crossbarVideoInput1 = this.GetCurrentCrossbarInput(iamcrossbar);
}
}
if (this.needToDisplayCrossBarPropertyPage1)
{
this.needToDisplayCrossBarPropertyPage1 = false;
if (iamcrossbar != null)
{
this.DisplayPropertyPage(this.parentWindowForPropertyPage1, iamcrossbar);
this.crossbarVideoInput1 = this.GetCurrentCrossbarInput(iamcrossbar);
}
}
if (this.stopEvent1.WaitOne(100, false))
{
goto IL_54E;
}
}
reason = ReasonToFinishPlaying.DeviceLost;
IL_54E:
mediaControl.Stop1();
}
}
catch (Exception ex)
{
if (this.VideoSourceError != null)
{
this.VideoSourceError(this, new VideoSourceErrorEventArgs(ex.Message));
}
}
finally
{
captureGraphBuilder = null;
filterGraph = null;
baseFilter = null;
iamvideoControl = null;
pin = null;
iamcrossbar = null;
baseFilter2 = null;
baseFilter3 = null;
sampleGrabber = null;
sampleGrabber2 = null;
if (obj2 != null)
{
Marshal.ReleaseComObject(obj2);
obj2 = null;
}
if (this.sourceObject1 != null)
{
Marshal.ReleaseComObject(this.sourceObject1);
this.sourceObject1 = null;
}
if (obj3 != null)
{
Marshal.ReleaseComObject(obj3);
obj3 = null;
}
if (obj4 != null)
{
Marshal.ReleaseComObject(obj4);
obj4 = null;
}
if (obj != null)
{
Marshal.ReleaseComObject(obj);
obj = null;
}
if (obj5 != null)
{
Marshal.ReleaseComObject(obj5);
obj5 = null;
}
}
if (this.PlayingFinished != null)
{
this.PlayingFinished(this, reason);
}
}
/// <summary>
/// Shut down capture.
/// This is used to release all resources needed by the capture graph.
/// </summary>
public void Dispose()
{
try
{
// To stop the capture filter before stopping the media control
// seems to solve the problem described in the next comment.
// sancta simplicitas...
if (this.capFilter != null)
{
this.capFilter.Stop();
}
// The stop or stopwhenready methods sometimes hang ...
// This is a multithreading issue but I don´t solved it yet
// But stopping is needed, otherwise the video device
// is not disposed fast enough (due to GC) so at next initialization
// with other params the video device seems to be in
// use and the GraphBuilder render mehtod fails.
if (this.mediaControl != null)
{
int hr = this.mediaControl.Stop();
}
this.isRunning = false;
}
catch (Exception ex)
{
ErrorLogger.ProcessException(ex, false);
}
if (this.capFilter != null)
{
Marshal.ReleaseComObject(this.capFilter);
this.capFilter = null;
this.cameraControl = null;
this.videoControl = null;
this.videoStreamConfig = null;
}
if (this.videoProcAmp != null)
{
Marshal.ReleaseComObject(this.videoProcAmp);
this.videoProcAmp = null;
}
if (this.sampGrabber != null)
{
Marshal.ReleaseComObject(this.sampGrabber);
this.sampGrabber = null;
}
if (this.graphBuilder != null)
{
Marshal.ReleaseComObject(this.graphBuilder);
this.graphBuilder = null;
this.mediaControl = null;
this.hasValidGraph = false;
}
if (this.capGraph != null)
{
Marshal.ReleaseComObject(this.capGraph);
this.capGraph = null;
}
if (this.map != IntPtr.Zero)
{
UnmapViewOfFile(this.map);
this.map = IntPtr.Zero;
}
if (this.section != IntPtr.Zero)
{
CloseHandle(this.section);
this.section = IntPtr.Zero;
}
#if DEBUG
if (this.rotEntry != null)
{
this.rotEntry.Dispose();
}
#endif
}
private void SetConfigParms(ICaptureGraphBuilder2 capBuilder, IBaseFilter capFilter, VideoFormatHelper.SupportedVideoFormat selectedFormat, ref float iFrameRate, ref int iWidth, ref int iHeight)
{
object o;
IAMStreamConfig videoStreamConfig;
IAMVideoControl videoControl = capFilter as IAMVideoControl;
int hr = capBuilder.FindInterface(PinCategory.Capture, MediaType.Video, capFilter, typeof(IAMStreamConfig).GUID, out o);
videoStreamConfig = o as IAMStreamConfig;
try
{
if (videoStreamConfig == null)
{
throw new Exception("Failed to get IAMStreamConfig");
}
int iCount = 0, iSize = 0;
hr = videoStreamConfig.GetNumberOfCapabilities(out iCount, out iSize);
DsError.ThrowExceptionForHR(hr);
VideoInfoHeader vMatching = null;
VideoFormatHelper.SupportedVideoFormat entry = null;
IntPtr taskMemPointer = Marshal.AllocCoTaskMem(iSize);
AMMediaType pmtConfig = null;
for (int iFormat = 0; iFormat < iCount; iFormat++)
{
IntPtr ptr = IntPtr.Zero;
hr = videoStreamConfig.GetStreamCaps(iFormat, out pmtConfig, taskMemPointer);
DsError.ThrowExceptionForHR(hr);
vMatching = (VideoInfoHeader)Marshal.PtrToStructure(pmtConfig.formatPtr, typeof(VideoInfoHeader));
if (vMatching.BmiHeader.BitCount > 0)
{
entry = new VideoFormatHelper.SupportedVideoFormat()
{
Width = vMatching.BmiHeader.Width,
Height = vMatching.BmiHeader.Height,
BitCount = vMatching.BmiHeader.BitCount,
FrameRate = 10000000.0 / vMatching.AvgTimePerFrame
};
if (entry.Matches(selectedFormat))
{
// WE FOUND IT !!!
break;
}
}
vMatching = null;
}
if (vMatching != null)
{
hr = videoStreamConfig.SetFormat(pmtConfig);
DsError.ThrowExceptionForHR(hr);
iFrameRate = 10000000 / vMatching.AvgTimePerFrame;
iWidth = vMatching.BmiHeader.Width;
iHeight = vMatching.BmiHeader.Height;
}
else
{
AMMediaType media;
hr = videoStreamConfig.GetFormat(out media);
DsError.ThrowExceptionForHR(hr);
// Copy out the videoinfoheader
VideoInfoHeader v = new VideoInfoHeader();
Marshal.PtrToStructure(media.formatPtr, v);
// If overriding the framerate, set the frame rate
if (iFrameRate > 0)
{
v.AvgTimePerFrame = (int)Math.Round(10000000 / iFrameRate);
}
else
{
iFrameRate = 10000000 / v.AvgTimePerFrame;
}
// If overriding the width, set the width
if (iWidth > 0)
{
v.BmiHeader.Width = iWidth;
}
else
{
iWidth = v.BmiHeader.Width;
}
// If overriding the Height, set the Height
if (iHeight > 0)
{
v.BmiHeader.Height = iHeight;
}
else
{
iHeight = v.BmiHeader.Height;
}
// Copy the media structure back
Marshal.StructureToPtr(v, media.formatPtr, false);
// Set the new format
hr = videoStreamConfig.SetFormat(media);
DsError.ThrowExceptionForHR(hr);
DsUtils.FreeAMMediaType(media);
media = null;
}
Marshal.FreeCoTaskMem(taskMemPointer);
DsUtils.FreeAMMediaType(pmtConfig);
pmtConfig = null;
}
finally
{
Marshal.ReleaseComObject(videoStreamConfig);
}
}
public override void Cleanup()
{
try
{
// To stop the capture filter before stopping the media control
// seems to solve the problem described in the next comment.
// sancta simplicitas...
if (capFilter != null)
{
capFilter.Stop();
}
// The stop or stopwhenready methods sometimes hang ...
// This is a multithreading issue but I don´t solved it yet
// But stopping is needed, otherwise the video device
// is not disposed fast enough (due to GC) so at next initialization
// with other params the video device seems to be in
// use and the GraphBuilder render mehtod fails.
if (mediaControl != null)
{
// This hangs when closing the GT
int hr = mediaControl.Stop();
}
isRunning = false;
}
catch (Exception)
{
//ErrorLogger.ProcessException(ex, false);
}
if (capFilter != null)
{
Marshal.ReleaseComObject(capFilter);
capFilter = null;
cameraControl = null;
videoControl = null;
videoStreamConfig = null;
}
if (videoProcAmp != null)
{
Marshal.ReleaseComObject(videoProcAmp);
videoProcAmp = null;
}
if (sampGrabber != null)
{
Marshal.ReleaseComObject(sampGrabber);
sampGrabber = null;
}
if (graphBuilder != null)
{
Marshal.ReleaseComObject(graphBuilder);
graphBuilder = null;
mediaControl = null;
hasValidGraph = false;
}
if (capGraph != null)
{
Marshal.ReleaseComObject(capGraph);
capGraph = null;
}
if (map != IntPtr.Zero)
{
UnmapViewOfFile(map);
map = IntPtr.Zero;
}
if (section != IntPtr.Zero)
{
CloseHandle(section);
section = IntPtr.Zero;
}
#if DEBUG
if (this.rotEntry != null)
{
// This hangs when closing the GT
this.rotEntry.Dispose();
}
#endif
}
public void PrepareCapture(int i_width, int i_height, float i_frame_rate)
{
const int BBP = 32;
//既にキャプチャ中なら諦める。
if (this.m_graphi_active)
{
throw new Exception();
}
//現在確保中のグラフインスタンスを全て削除
CleanupGraphiObjects();
int hr;
ISampleGrabber sampGrabber = null;
IBaseFilter capFilter = null;
IPin pSampleIn = null;
//グラフビルダを作る。
this.m_FilterGraph = new FilterGraph() as IFilterGraph2;
try
{
//フィルタグラフにキャプチャを追加して、capFilterにピンを受け取る。
hr = m_FilterGraph.AddSourceFilterForMoniker(this.m_dev.Mon, null, this.m_dev.Name, out capFilter);
DsError.ThrowExceptionForHR(hr);
//stillピンを探す
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Still, 0);
//stillピンが無ければPreviewを探す。
if (m_pinStill == null)
{
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Preview, 0);
}
// Still haven't found one. Need to put a splitter in so we have
// one stream to capture the bitmap from, and one to display. Ok, we
// don't *have* to do it that way, but we are going to anyway.
if (m_pinStill == null)
{
// There is no still pin
m_VidControl = null;
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
}
else
{
// Get a control pointer (used in Click())
m_VidControl = capFilter as IAMVideoControl;
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
}
if (i_height + i_width + BBP > 0)
{
SetConfigParms(m_pinStill, i_width, i_height, i_frame_rate, BBP);
}
// Get the SampleGrabber interface
sampGrabber = new SampleGrabber() as ISampleGrabber;
//sampGrabberの設定
IBaseFilter baseGrabFlt = sampGrabber as IBaseFilter;
ConfigureSampleGrabber(sampGrabber);
pSampleIn = DsFindPin.ByDirection(baseGrabFlt, PinDirection.Input, 0);
// Add the sample grabber to the graph
hr = m_FilterGraph.AddFilter(baseGrabFlt, "Ds.NET Grabber");
DsError.ThrowExceptionForHR(hr);
if (m_VidControl == null)
{
// Connect the Still pin to the sample grabber
hr = m_FilterGraph.Connect(m_pinStill, pSampleIn);
DsError.ThrowExceptionForHR(hr);
}
else
{
// Connect the Still pin to the sample grabber
hr = m_FilterGraph.Connect(m_pinStill, pSampleIn);
DsError.ThrowExceptionForHR(hr);
}
hr = sampGrabber.GetConnectedMediaType(this._capture_mediatype);
DsError.ThrowExceptionForHR(hr);
//ビデオフォーマット等の更新
upateVideoInfo(sampGrabber);
}
finally
{
if (sampGrabber != null)
{
Marshal.ReleaseComObject(sampGrabber);
sampGrabber = null;
}
if (pSampleIn != null)
{
Marshal.ReleaseComObject(pSampleIn);
pSampleIn = null;
}
}
}
// Set the Framerate, and video size
private void SetConfigParms(ICaptureGraphBuilder2 capGraph, IBaseFilter capFilter, int iFrameRate, int iWidth, int iHeight)
{
int hr;
object o;
AMMediaType media;
IAMStreamConfig videoStreamConfig;
IAMVideoControl videoControl = capFilter as IAMVideoControl;
// Find the stream config interface
hr = capGraph.FindInterface(
PinCategory.Capture, MediaType.Video, capFilter, typeof(IAMStreamConfig).GUID, out o);
videoStreamConfig = o as IAMStreamConfig;
try
{
if (videoStreamConfig == null)
{
throw new Exception("Failed to get IAMStreamConfig");
}
hr = videoStreamConfig.GetFormat(out media);
DsError.ThrowExceptionForHR(hr);
// copy out the videoinfoheader
VideoInfoHeader v = new VideoInfoHeader();
Marshal.PtrToStructure(media.formatPtr, v);
// if overriding the framerate, set the frame rate
if (iFrameRate > 0)
{
v.AvgTimePerFrame = 10000000 / iFrameRate;
}
// if overriding the width, set the width
if (iWidth > 0)
{
v.BmiHeader.Width = iWidth;
}
// if overriding the Height, set the Height
if (iHeight > 0)
{
v.BmiHeader.Height = iHeight;
}
// Copy the media structure back
Marshal.StructureToPtr(v, media.formatPtr, false);
// Set the new format
hr = videoStreamConfig.SetFormat(media);
DsError.ThrowExceptionForHR(hr);
DsUtils.FreeAMMediaType(media);
media = null;
// Fix upsidedown video
if (videoControl != null)
{
VideoControlFlags pCapsFlags;
IPin pPin = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
hr = videoControl.GetCaps(pPin, out pCapsFlags);
DsError.ThrowExceptionForHR(hr);
if ((pCapsFlags & VideoControlFlags.FlipVertical) > 0)
{
hr = videoControl.GetMode(pPin, out pCapsFlags);
DsError.ThrowExceptionForHR(hr);
hr = videoControl.SetMode(pPin, 0);
}
}
}
finally
{
Marshal.ReleaseComObject(videoStreamConfig);
}
}
/**
* 必要に応じてグラフオブジェクトを全て削除する。
*/
private void CleanupGraphiObjects()
{
this.m_video_info = null;
if (m_FilterGraph != null)
{
Marshal.ReleaseComObject(m_FilterGraph);
m_FilterGraph = null;
}
if (m_VidControl != null)
{
Marshal.ReleaseComObject(m_VidControl);
m_VidControl = null;
}
if (m_pinStill != null)
{
Marshal.ReleaseComObject(m_pinStill);
m_pinStill = null;
}
}
public void PrepareCapture(int i_width, int i_height,float i_frame_rate)
{
const int BBP = 32;
//既にキャプチャ中なら諦める。
if (this.m_graphi_active)
{
throw new Exception();
}
//現在確保中のグラフインスタンスを全て削除
CleanupGraphiObjects();
int hr;
ISampleGrabber sampGrabber = null;
IBaseFilter capFilter = null;
IPin pSampleIn = null;
//グラフビルダを作る。
this.m_FilterGraph = new FilterGraph() as IFilterGraph2;
try
{
//フィルタグラフにキャプチャを追加して、capFilterにピンを受け取る。
hr = m_FilterGraph.AddSourceFilterForMoniker(this.m_dev.Mon, null, this.m_dev.Name, out capFilter);
DsError.ThrowExceptionForHR(hr);
//stillピンを探す
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Still, 0);
//stillピンが無ければPreviewを探す。
if (m_pinStill == null)
{
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Preview, 0);
}
// Still haven't found one. Need to put a splitter in so we have
// one stream to capture the bitmap from, and one to display. Ok, we
// don't *have* to do it that way, but we are going to anyway.
if (m_pinStill == null)
{
// There is no still pin
m_VidControl = null;
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
}else{
// Get a control pointer (used in Click())
m_VidControl = capFilter as IAMVideoControl;
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
}
if (i_height + i_width + BBP > 0)
{
SetConfigParms(m_pinStill, i_width, i_height,i_frame_rate, BBP);
}
// Get the SampleGrabber interface
sampGrabber = new SampleGrabber() as ISampleGrabber;
//sampGrabberの設定
IBaseFilter baseGrabFlt = sampGrabber as IBaseFilter;
ConfigureSampleGrabber(sampGrabber);
pSampleIn = DsFindPin.ByDirection(baseGrabFlt, PinDirection.Input, 0);
// Add the sample grabber to the graph
hr = m_FilterGraph.AddFilter(baseGrabFlt, "Ds.NET Grabber");
DsError.ThrowExceptionForHR(hr);
if (m_VidControl == null)
{
// Connect the Still pin to the sample grabber
hr = m_FilterGraph.Connect(m_pinStill, pSampleIn);
DsError.ThrowExceptionForHR(hr);
}else{
// Connect the Still pin to the sample grabber
hr = m_FilterGraph.Connect(m_pinStill, pSampleIn);
DsError.ThrowExceptionForHR(hr);
}
hr = sampGrabber.GetConnectedMediaType(this._capture_mediatype);
DsError.ThrowExceptionForHR(hr);
//ビデオフォーマット等の更新
upateVideoInfo(sampGrabber);
}
finally
{
if (sampGrabber != null)
{
Marshal.ReleaseComObject(sampGrabber);
sampGrabber = null;
}
if (pSampleIn != null)
{
Marshal.ReleaseComObject(pSampleIn);
pSampleIn = null;
}
}
}
/// <summary>
/// Set the Framerate, and video size
/// </summary>
/// <param name="capGraph">The <see cref="ICaptureGraphBuilder2"/> interface.</param>
/// <param name="capFilter">The <see cref="IBaseFilter"/> of the capture device.</param>
/// <param name="frameRate">The new framerate to be used.</param>
/// <param name="width">The new video width to be used.</param>
/// <param name="height">The new video height to be used.</param>
private void SetConfigParms(ICaptureGraphBuilder2 capGraph, IBaseFilter capFilter, int frameRate, int width,
int height)
{
int hr;
object o;
AMMediaType media = null;
// Find the stream config interface
hr = this.capGraph.FindInterface(PinCategory.Capture, MediaType.Video, capFilter,
typeof(IAMStreamConfig).GUID, out o);
videoControl = capFilter as IAMVideoControl;
videoStreamConfig = o as IAMStreamConfig;
//if (videoStreamConfig == null)
// ErrorLogger.WriteLine("Error in Capture.SetConfigParams(). Failed to get IAMStreamConfig");
// Get the existing format block
if (videoStreamConfig != null) hr = videoStreamConfig.GetFormat(out media);
//if (hr != 0)
// ErrorLogger.WriteLine("Could not SetConfigParms in Camera.Capture. Message: " + DsError.GetErrorText(hr));
// copy out the videoinfoheader
var v = new VideoInfoHeader();
Marshal.PtrToStructure(media.formatPtr, v);
// if overriding set values
if (frameRate > 0)
{
v.AvgTimePerFrame = 10000000 / frameRate;
this.fps = frameRate;
}
else
{
this.fps = (int)(10000000 / v.AvgTimePerFrame);
}
if (width > 0)
v.BmiHeader.Width = width;
if (height > 0)
v.BmiHeader.Height = height;
// Copy the media structure back
Marshal.StructureToPtr(v, media.formatPtr, true);
// Set the new format
if (videoStreamConfig != null) hr = videoStreamConfig.SetFormat(media);
//if (hr != 0)
// ErrorLogger.WriteLine(
// "Error while setting new camera format (videoStreamConfig) in Camera.Capture. Message: " +
// DsError.GetErrorText(hr));
DsUtils.FreeAMMediaType(media);
media = null;
}
/// <summary> build the capture graph for grabber. </summary>
private void SetupGraph(DsDevice dev, int iWidth, int iHeight, short iBPP, Control hControl)
{
int hr;
ISampleGrabber sampGrabber = null;
IBaseFilter capFilter = null;
IPin pCaptureOut = null;
IPin pSampleIn = null;
IPin pRenderIn = null;
// Get the graphbuilder object
m_FilterGraph = new FilterGraph() as IFilterGraph2;
try
{
#if DEBUG
m_rot = new DsROTEntry(m_FilterGraph);
#endif
// add the video input device
hr = m_FilterGraph.AddSourceFilterForMoniker(dev.Mon, null, dev.Name, out capFilter);
DsError.ThrowExceptionForHR(hr);
// Find the still pin
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Still, 0);
// Didn't find one. Is there a preview pin?
if (m_pinStill == null)
{
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Preview, 0);
}
// Still haven't found one. Need to put a splitter in so we have
// one stream to capture the bitmap from, and one to display. Ok, we
// don't *have* to do it that way, but we are going to anyway.
if (m_pinStill == null)
{
IPin pRaw = null;
IPin pSmart = null;
// There is no still pin
m_VidControl = null;
// Add a splitter
IBaseFilter iSmartTee = (IBaseFilter)new SmartTee();
try
{
hr = m_FilterGraph.AddFilter(iSmartTee, "SmartTee");
DsError.ThrowExceptionForHR(hr);
// Find the find the capture pin from the video device and the
// input pin for the splitter, and connnect them
pRaw = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
pSmart = DsFindPin.ByDirection(iSmartTee, PinDirection.Input, 0);
hr = m_FilterGraph.Connect(pRaw, pSmart);
DsError.ThrowExceptionForHR(hr);
// Now set the capture and still pins (from the splitter)
m_pinStill = DsFindPin.ByName(iSmartTee, "Preview");
pCaptureOut = DsFindPin.ByName(iSmartTee, "Capture");
// If any of the default config items are set, perform the config
// on the actual video device (rather than the splitter)
if (iHeight + iWidth + iBPP > 0)
{
SetConfigParms(pRaw, iWidth, iHeight, iBPP);
}
}
finally
{
if (pRaw != null)
{
Marshal.ReleaseComObject(pRaw);
}
if (pRaw != pSmart)
{
Marshal.ReleaseComObject(pSmart);
}
if (pRaw != iSmartTee)
{
Marshal.ReleaseComObject(iSmartTee);
}
}
}
else
{
// Get a control pointer (used in Click())
m_VidControl = capFilter as IAMVideoControl;
pCaptureOut = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
// If any of the default config items are set
if (iHeight + iWidth + iBPP > 0)
{
SetConfigParms(m_pinStill, iWidth, iHeight, iBPP);
}
}
// Get the SampleGrabber interface
sampGrabber = new SampleGrabber() as ISampleGrabber;
// Configure the sample grabber
IBaseFilter baseGrabFlt = sampGrabber as IBaseFilter;
ConfigureSampleGrabber(sampGrabber);
pSampleIn = DsFindPin.ByDirection(baseGrabFlt, PinDirection.Input, 0);
// Get the default video renderer
IBaseFilter pRenderer = new VideoRendererDefault() as IBaseFilter;
hr = m_FilterGraph.AddFilter(pRenderer, "Renderer");
DsError.ThrowExceptionForHR(hr);
pRenderIn = DsFindPin.ByDirection(pRenderer, PinDirection.Input, 0);
// Add the sample grabber to the graph
hr = m_FilterGraph.AddFilter(baseGrabFlt, "Ds.NET Grabber");
DsError.ThrowExceptionForHR(hr);
if (m_VidControl == null)
{
// Connect the Still pin to the sample grabber
hr = m_FilterGraph.Connect(m_pinStill, pSampleIn);
DsError.ThrowExceptionForHR(hr);
// Connect the capture pin to the renderer
hr = m_FilterGraph.Connect(pCaptureOut, pRenderIn);
DsError.ThrowExceptionForHR(hr);
}
else
{
// Connect the capture pin to the renderer
hr = m_FilterGraph.Connect(pCaptureOut, pRenderIn);
DsError.ThrowExceptionForHR(hr);
// Connect the Still pin to the sample grabber
hr = m_FilterGraph.Connect(m_pinStill, pSampleIn);
DsError.ThrowExceptionForHR(hr);
}
// Learn the video properties
SaveSizeInfo(sampGrabber);
ConfigVideoWindow(hControl);
// Start the graph
IMediaControl mediaCtrl = m_FilterGraph as IMediaControl;
hr = mediaCtrl.Run();
DsError.ThrowExceptionForHR(hr);
}
finally
{
if (sampGrabber != null)
{
Marshal.ReleaseComObject(sampGrabber);
sampGrabber = null;
}
if (pCaptureOut != null)
{
Marshal.ReleaseComObject(pCaptureOut);
pCaptureOut = null;
}
if (pRenderIn != null)
{
Marshal.ReleaseComObject(pRenderIn);
pRenderIn = null;
}
if (pSampleIn != null)
{
Marshal.ReleaseComObject(pSampleIn);
pSampleIn = null;
}
}
}
private void WorkerThread(bool runGraph)
{
ReasonToFinishPlaying reason = ReasonToFinishPlaying.StoppedByUser;
bool flag = false;
Grabber grabber = new Grabber(this, snapshotMode: false);
Grabber grabber2 = new Grabber(this, snapshotMode: true);
object obj = null;
object obj2 = null;
object obj3 = null;
object obj4 = null;
object retInterface = null;
ICaptureGraphBuilder2 captureGraphBuilder = null;
IFilterGraph2 filterGraph = null;
IBaseFilter baseFilter = null;
IBaseFilter baseFilter2 = null;
IBaseFilter baseFilter3 = null;
ISampleGrabber sampleGrabber = null;
ISampleGrabber sampleGrabber2 = null;
IMediaControl mediaControl = null;
IAMVideoControl iAMVideoControl = null;
IMediaEventEx mediaEventEx = null;
IPin pin = null;
IAMCrossbar iAMCrossbar = null;
try
{
Type typeFromCLSID = Type.GetTypeFromCLSID(Clsid.CaptureGraphBuilder2);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating capture graph builder");
}
obj = Activator.CreateInstance(typeFromCLSID);
captureGraphBuilder = (ICaptureGraphBuilder2)obj;
typeFromCLSID = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating filter graph");
}
obj2 = Activator.CreateInstance(typeFromCLSID);
filterGraph = (IFilterGraph2)obj2;
captureGraphBuilder.SetFiltergraph((IGraphBuilder)filterGraph);
sourceObject = FilterInfo.CreateFilter(deviceMoniker);
if (sourceObject == null)
{
throw new ApplicationException("Failed creating device object for moniker");
}
baseFilter = (IBaseFilter)sourceObject;
try
{
iAMVideoControl = (IAMVideoControl)sourceObject;
}
catch
{
}
typeFromCLSID = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (typeFromCLSID == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
obj3 = Activator.CreateInstance(typeFromCLSID);
sampleGrabber = (ISampleGrabber)obj3;
baseFilter2 = (IBaseFilter)obj3;
obj4 = Activator.CreateInstance(typeFromCLSID);
sampleGrabber2 = (ISampleGrabber)obj4;
baseFilter3 = (IBaseFilter)obj4;
filterGraph.AddFilter(baseFilter, "source");
filterGraph.AddFilter(baseFilter2, "grabber_video");
filterGraph.AddFilter(baseFilter3, "grabber_snapshot");
AMMediaType aMMediaType = new AMMediaType();
aMMediaType.MajorType = MediaType.Video;
aMMediaType.SubType = MediaSubType.RGB24;
sampleGrabber.SetMediaType(aMMediaType);
sampleGrabber2.SetMediaType(aMMediaType);
captureGraphBuilder.FindInterface(FindDirection.UpstreamOnly, Guid.Empty, baseFilter, typeof(IAMCrossbar).GUID, out retInterface);
if (retInterface != null)
{
iAMCrossbar = (IAMCrossbar)retInterface;
}
isCrossbarAvailable = (iAMCrossbar != null);
crossbarVideoInputs = ColletCrossbarVideoInputs(iAMCrossbar);
if (iAMVideoControl != null)
{
captureGraphBuilder.FindPin(sourceObject, PinDirection.Output, PinCategory.StillImage, MediaType.Video, unconnected: false, 0, out pin);
if (pin != null)
{
iAMVideoControl.GetCaps(pin, out VideoControlFlags flags);
flag = ((flags & VideoControlFlags.ExternalTriggerEnable) != 0);
}
}
sampleGrabber.SetBufferSamples(bufferThem: false);
sampleGrabber.SetOneShot(oneShot: false);
sampleGrabber.SetCallback(grabber, 1);
sampleGrabber2.SetBufferSamples(bufferThem: true);
sampleGrabber2.SetOneShot(oneShot: false);
sampleGrabber2.SetCallback(grabber2, 1);
GetPinCapabilitiesAndConfigureSizeAndRate(captureGraphBuilder, baseFilter, PinCategory.Capture, videoResolution, ref videoCapabilities);
if (flag)
{
GetPinCapabilitiesAndConfigureSizeAndRate(captureGraphBuilder, baseFilter, PinCategory.StillImage, snapshotResolution, ref snapshotCapabilities);
}
else
{
snapshotCapabilities = new VideoCapabilities[0];
}
lock (cacheVideoCapabilities)
{
if (videoCapabilities != null && !cacheVideoCapabilities.ContainsKey(deviceMoniker))
{
cacheVideoCapabilities.Add(deviceMoniker, videoCapabilities);
}
}
lock (cacheSnapshotCapabilities)
{
if (snapshotCapabilities != null && !cacheSnapshotCapabilities.ContainsKey(deviceMoniker))
{
cacheSnapshotCapabilities.Add(deviceMoniker, snapshotCapabilities);
}
}
if (runGraph)
{
captureGraphBuilder.RenderStream(PinCategory.Capture, MediaType.Video, baseFilter, null, baseFilter2);
if (sampleGrabber.GetConnectedMediaType(aMMediaType) == 0)
{
VideoInfoHeader videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(aMMediaType.FormatPtr, typeof(VideoInfoHeader));
grabber.Width = videoInfoHeader.BmiHeader.Width;
grabber.Height = videoInfoHeader.BmiHeader.Height;
aMMediaType.Dispose();
}
if (flag && provideSnapshots)
{
captureGraphBuilder.RenderStream(PinCategory.StillImage, MediaType.Video, baseFilter, null, baseFilter3);
if (sampleGrabber2.GetConnectedMediaType(aMMediaType) == 0)
{
VideoInfoHeader videoInfoHeader2 = (VideoInfoHeader)Marshal.PtrToStructure(aMMediaType.FormatPtr, typeof(VideoInfoHeader));
grabber2.Width = videoInfoHeader2.BmiHeader.Width;
grabber2.Height = videoInfoHeader2.BmiHeader.Height;
aMMediaType.Dispose();
}
}
mediaControl = (IMediaControl)obj2;
mediaEventEx = (IMediaEventEx)obj2;
mediaControl.Run();
if (flag && provideSnapshots)
{
startTime = DateTime.Now;
iAMVideoControl.SetMode(pin, VideoControlFlags.ExternalTriggerEnable);
}
do
{
if (mediaEventEx != null && mediaEventEx.GetEvent(out DsEvCode lEventCode, out IntPtr lParam, out IntPtr lParam2, 0) >= 0)
{
mediaEventEx.FreeEventParams(lEventCode, lParam, lParam2);
if (lEventCode == DsEvCode.DeviceLost)
{
reason = ReasonToFinishPlaying.DeviceLost;
break;
}
}
if (needToSetVideoInput)
{
needToSetVideoInput = false;
if (isCrossbarAvailable.Value)
{
SetCurrentCrossbarInput(iAMCrossbar, crossbarVideoInput);
crossbarVideoInput = GetCurrentCrossbarInput(iAMCrossbar);
}
}
if (needToSimulateTrigger)
{
needToSimulateTrigger = false;
if (flag && provideSnapshots)
{
iAMVideoControl.SetMode(pin, VideoControlFlags.Trigger);
}
}
if (needToDisplayPropertyPage)
{
needToDisplayPropertyPage = false;
DisplayPropertyPage(parentWindowForPropertyPage, sourceObject);
if (iAMCrossbar != null)
{
crossbarVideoInput = GetCurrentCrossbarInput(iAMCrossbar);
}
}
if (needToDisplayCrossBarPropertyPage)
{
needToDisplayCrossBarPropertyPage = false;
if (iAMCrossbar != null)
{
DisplayPropertyPage(parentWindowForPropertyPage, iAMCrossbar);
crossbarVideoInput = GetCurrentCrossbarInput(iAMCrossbar);
}
}
}while (!stopEvent.WaitOne(100, exitContext: false));
mediaControl.Stop();
}
}
catch (Exception ex)
{
if (this.VideoSourceError != null)
{
this.VideoSourceError(this, new VideoSourceErrorEventArgs(ex.Message));
}
}
finally
{
captureGraphBuilder = null;
filterGraph = null;
baseFilter = null;
mediaControl = null;
iAMVideoControl = null;
mediaEventEx = null;
pin = null;
iAMCrossbar = null;
baseFilter2 = null;
baseFilter3 = null;
sampleGrabber = null;
sampleGrabber2 = null;
if (obj2 != null)
{
Marshal.ReleaseComObject(obj2);
obj2 = null;
}
if (sourceObject != null)
{
Marshal.ReleaseComObject(sourceObject);
sourceObject = null;
}
if (obj3 != null)
{
Marshal.ReleaseComObject(obj3);
obj3 = null;
}
if (obj4 != null)
{
Marshal.ReleaseComObject(obj4);
obj4 = null;
}
if (obj != null)
{
Marshal.ReleaseComObject(obj);
obj = null;
}
if (retInterface != null)
{
Marshal.ReleaseComObject(retInterface);
retInterface = null;
}
}
if (this.PlayingFinished != null)
{
this.PlayingFinished(this, reason);
}
}
private void SetupGraph(DsDevice dev, int iWidth, int iHeight, short iBPP)
{
int hr;
ISampleGrabber sampGrabber = null;
IBaseFilter capFilter = null;
IPin pCaptureOut = null;
IPin pSampleIn = null;
IPin pRenderIn = null;
m_FilterGraph = new FilterGraph() as IFilterGraph2;
try
{
#if DEBUG
m_rot = new DsROTEntry(m_FilterGraph);
#endif
hr = m_FilterGraph.AddSourceFilterForMoniker(dev.Mon, null, dev.Name, out capFilter);
DsError.ThrowExceptionForHR(hr);
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Still, 0);
if (m_pinStill == null)
{
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Preview, 0);
}
if (m_pinStill == null)
{
IPin pRaw = null;
IPin pSmart = null;
m_VidControl = null;
IBaseFilter iSmartTee = (IBaseFilter) new SmartTee();
try
{
hr = m_FilterGraph.AddFilter(iSmartTee, "SmartTee");
DsError.ThrowExceptionForHR(hr);
pRaw = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
pSmart = DsFindPin.ByDirection(iSmartTee, PinDirection.Input, 0);
hr = m_FilterGraph.Connect(pRaw, pSmart);
DsError.ThrowExceptionForHR(hr);
m_pinStill = DsFindPin.ByName(iSmartTee, "Preview");
pCaptureOut = DsFindPin.ByName(iSmartTee, "Capture");
if (iHeight + iWidth + iBPP > 0)
{
SetConfigParms(pRaw, iWidth, iHeight, iBPP);
}
}
finally
{
if (pRaw != null)
{
Marshal.ReleaseComObject(pRaw);
}
if (pRaw != pSmart)
{
Marshal.ReleaseComObject(pSmart);
}
if (pRaw != iSmartTee)
{
Marshal.ReleaseComObject(iSmartTee);
}
}
}
else
{
m_VidControl = capFilter as IAMVideoControl;
pCaptureOut = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
if (iHeight + iWidth + iBPP > 0)
{
SetConfigParms(m_pinStill, iWidth, iHeight, iBPP);
}
}
sampGrabber = new SampleGrabber() as ISampleGrabber;
IBaseFilter baseGrabFlt = sampGrabber as IBaseFilter;
ConfigureSampleGrabber(sampGrabber);
pSampleIn = DsFindPin.ByDirection(baseGrabFlt, PinDirection.Input, 0);
IBaseFilter pRenderer = new VideoRendererDefault() as IBaseFilter;
hr = m_FilterGraph.AddFilter(pRenderer, "Renderer");
DsError.ThrowExceptionForHR(hr);
pRenderIn = DsFindPin.ByDirection(pRenderer, PinDirection.Input, 0);
hr = m_FilterGraph.AddFilter(baseGrabFlt, "Ds.NET Grabber");
DsError.ThrowExceptionForHR(hr);
if (m_VidControl == null)
{
hr = m_FilterGraph.Connect(m_pinStill, pSampleIn);
DsError.ThrowExceptionForHR(hr);
hr = m_FilterGraph.Connect(pCaptureOut, pRenderIn);
DsError.ThrowExceptionForHR(hr);
}
else
{
hr = m_FilterGraph.Connect(pCaptureOut, pRenderIn);
DsError.ThrowExceptionForHR(hr);
hr = m_FilterGraph.Connect(m_pinStill, pSampleIn);
DsError.ThrowExceptionForHR(hr);
}
SaveSizeInfo(sampGrabber);
IMediaControl mediaCtrl = m_FilterGraph as IMediaControl;
hr = mediaCtrl.Run();
DsError.ThrowExceptionForHR(hr);
}
finally
{
if (sampGrabber != null)
{
Marshal.ReleaseComObject(sampGrabber);
sampGrabber = null;
}
if (pCaptureOut != null)
{
Marshal.ReleaseComObject(pCaptureOut);
pCaptureOut = null;
}
if (pRenderIn != null)
{
Marshal.ReleaseComObject(pRenderIn);
pRenderIn = null;
}
if (pSampleIn != null)
{
Marshal.ReleaseComObject(pSampleIn);
pSampleIn = null;
}
}
}
/// <summary>
/// Start using the camera
/// </summary>
/// <returns>Indicate if the webcam was able to start</returns>
public bool Start()
{
if (!started)
{
DsDevice[] devices = GetDevices();
if (devices.Length > 0)
{
DsDevice dev = devices[0];
// Initialize camera
int hr;
IBaseFilter capFilter = null;
ISampleGrabber sampGrabber = null;
IPin pCaptureOut = null;
IPin pSampleIn = null;
IPin pRenderIn = null;
m_FilterGraph = new FilterGraph() as IFilterGraph2;
try
{
hr = m_FilterGraph.AddSourceFilterForMoniker(dev.Mon, null, dev.Name, out capFilter);
if (m_pinStill == null)
{
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Preview, 0);
}
// Still haven't found one. Need to put a splitter in so we have
// one stream to capture the bitmap from, and one to display. Ok, we
// don't *have* to do it that way, but we are going to anyway.
if (m_pinStill == null)
{
IPin pRaw = null;
IPin pSmart = null;
// There is no still pin
m_VidControl = null;
// Add a splitter
IBaseFilter iSmartTee = (IBaseFilter) new SmartTee();
try
{
hr = m_FilterGraph.AddFilter(iSmartTee, "SmartTee");
DsError.ThrowExceptionForHR(hr);
// Find the find the capture pin from the video device and the
// input pin for the splitter, and connnect them
pRaw = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
pSmart = DsFindPin.ByDirection(iSmartTee, PinDirection.Input, 0);
hr = m_FilterGraph.Connect(pRaw, pSmart);
DsError.ThrowExceptionForHR(hr);
// Now set the capture and still pins (from the splitter)
m_pinStill = DsFindPin.ByName(iSmartTee, "Preview");
pCaptureOut = DsFindPin.ByName(iSmartTee, "Capture");
// If any of the default config items are set, perform the config
// on the actual video device (rather than the splitter)
if (captureHeight + captureWidth > 0)
{
SetConfigParms(pRaw, captureWidth, captureHeight, 24);
}
}
finally
{
if (pRaw != null)
{
Marshal.ReleaseComObject(pRaw);
}
if (pRaw != pSmart)
{
Marshal.ReleaseComObject(pSmart);
}
if (pRaw != iSmartTee)
{
Marshal.ReleaseComObject(iSmartTee);
}
}
}
else
{
// Get a control pointer (used in Click())
m_VidControl = capFilter as IAMVideoControl;
pCaptureOut = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
// If any of the default config items are set
if (captureHeight + captureWidth > 0)
{
SetConfigParms(m_pinStill, captureWidth, captureHeight, 24);
}
}
// Get the SampleGrabber interface
sampGrabber = new SampleGrabber() as ISampleGrabber;
// Configure the sample grabber
IBaseFilter baseGrabFlt = sampGrabber as IBaseFilter;
ConfigureSampleGrabber(sampGrabber);
pSampleIn = DsFindPin.ByDirection(baseGrabFlt, PinDirection.Input, 0);
// Get the default video renderer
IBaseFilter pRenderer = new VideoRendererDefault() as IBaseFilter;
hr = m_FilterGraph.AddFilter(pRenderer, "Renderer");
DsError.ThrowExceptionForHR(hr);
pRenderIn = DsFindPin.ByDirection(pRenderer, PinDirection.Input, 0);
// Add the sample grabber to the graph
hr = m_FilterGraph.AddFilter(baseGrabFlt, "Ds.NET Grabber");
DsError.ThrowExceptionForHR(hr);
if (m_VidControl == null)
{
// Connect the Still pin to the sample grabber
hr = m_FilterGraph.Connect(m_pinStill, pSampleIn);
DsError.ThrowExceptionForHR(hr);
// Connect the capture pin to the renderer
hr = m_FilterGraph.Connect(pCaptureOut, pRenderIn);
DsError.ThrowExceptionForHR(hr);
}
else
{
// Connect the capture pin to the renderer
hr = m_FilterGraph.Connect(pCaptureOut, pRenderIn);
DsError.ThrowExceptionForHR(hr);
// Connect the Still pin to the sample grabber
hr = m_FilterGraph.Connect(m_pinStill, pSampleIn);
DsError.ThrowExceptionForHR(hr);
}
SaveSizeInfo(sampGrabber);
ConfigVideoWindow(pictureBox);
IMediaControl mediaCtrl = m_FilterGraph as IMediaControl;
hr = mediaCtrl.Run();
DsError.ThrowExceptionForHR(hr);
}
finally
{
if (sampGrabber != null)
{
Marshal.ReleaseComObject(sampGrabber);
sampGrabber = null;
}
if (pCaptureOut != null)
{
Marshal.ReleaseComObject(pCaptureOut);
pCaptureOut = null;
}
if (pRenderIn != null)
{
Marshal.ReleaseComObject(pRenderIn);
pRenderIn = null;
}
if (pSampleIn != null)
{
Marshal.ReleaseComObject(pSampleIn);
pSampleIn = null;
}
}
m_PictureReady = new ManualResetEvent(false);
timer.Interval = (int)(1000 / framesPerSecond);
timer.Start();
return(true);
}
}
else
{
return(true);
}
return(false);
}
/// <summary> build the capture graph for grabber. </summary>
private void SetupGraph(DsDevice dev, int iWidth, int iHeight, short iBPP, Control hControl)
{
int hr;
ISampleGrabber sampGrabber = null;
IBaseFilter capFilter = null;
IPin pCaptureOut = null;
IPin pSampleIn = null;
IPin pRenderIn = null;
// Get the graphbuilder object
m_FilterGraph = new FilterGraph() as IFilterGraph2;
try
{
#if DEBUG
m_rot = new DsROTEntry(m_FilterGraph);
#endif
// add the video input device
hr = m_FilterGraph.AddSourceFilterForMoniker(dev.Mon, null, dev.Name, out capFilter);
DsError.ThrowExceptionForHR(hr);
// Find the still pin
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Still, 0);
// Didn't find one. Is there a preview pin?
if (m_pinStill == null)
{
m_pinStill = DsFindPin.ByCategory(capFilter, PinCategory.Preview, 0);
}
// Still haven't found one. Need to put a splitter in so we have
// one stream to capture the bitmap from, and one to display. Ok, we
// don't *have* to do it that way, but we are going to anyway.
if (m_pinStill == null)
{
IPin pRaw = null;
IPin pSmart = null;
// There is no still pin
m_VidControl = null;
// Add a splitter
IBaseFilter iSmartTee = (IBaseFilter) new SmartTee();
try
{
hr = m_FilterGraph.AddFilter(iSmartTee, "SmartTee");
DsError.ThrowExceptionForHR(hr);
// Find the find the capture pin from the video device and the
// input pin for the splitter, and connnect them
pRaw = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
pSmart = DsFindPin.ByDirection(iSmartTee, PinDirection.Input, 0);
hr = m_FilterGraph.Connect(pRaw, pSmart);
DsError.ThrowExceptionForHR(hr);
// Now set the capture and still pins (from the splitter)
m_pinStill = DsFindPin.ByName(iSmartTee, "Preview");
pCaptureOut = DsFindPin.ByName(iSmartTee, "Capture");
// If any of the default config items are set, perform the config
// on the actual video device (rather than the splitter)
if (iHeight + iWidth + iBPP > 0)
{
SetConfigParms(pRaw, iWidth, iHeight, iBPP);
}
}
finally
{
if (pRaw != null)
{
Marshal.ReleaseComObject(pRaw);
}
if (pRaw != pSmart)
{
Marshal.ReleaseComObject(pSmart);
}
if (pRaw != iSmartTee)
{
Marshal.ReleaseComObject(iSmartTee);
}
}
}
else
{
// Get a control pointer (used in Click())
m_VidControl = capFilter as IAMVideoControl;
pCaptureOut = DsFindPin.ByCategory(capFilter, PinCategory.Capture, 0);
// If any of the default config items are set
if (iHeight + iWidth + iBPP > 0)
{
SetConfigParms(m_pinStill, iWidth, iHeight, iBPP);
}
}
// Get the SampleGrabber interface
sampGrabber = new SampleGrabber() as ISampleGrabber;
// Configure the sample grabber
IBaseFilter baseGrabFlt = sampGrabber as IBaseFilter;
ConfigureSampleGrabber(sampGrabber);
pSampleIn = DsFindPin.ByDirection(baseGrabFlt, PinDirection.Input, 0);
// Get the default video renderer
IBaseFilter pRenderer = new VideoRendererDefault() as IBaseFilter;
hr = m_FilterGraph.AddFilter(pRenderer, "Renderer");
DsError.ThrowExceptionForHR(hr);
pRenderIn = DsFindPin.ByDirection(pRenderer, PinDirection.Input, 0);
// Add the sample grabber to the graph
hr = m_FilterGraph.AddFilter(baseGrabFlt, "Ds.NET Grabber");
DsError.ThrowExceptionForHR(hr);
if (m_VidControl == null)
{
// Connect the Still pin to the sample grabber
hr = m_FilterGraph.Connect(m_pinStill, pSampleIn);
DsError.ThrowExceptionForHR(hr);
// Connect the capture pin to the renderer
hr = m_FilterGraph.Connect(pCaptureOut, pRenderIn);
DsError.ThrowExceptionForHR(hr);
}
else
{
// Connect the capture pin to the renderer
hr = m_FilterGraph.Connect(pCaptureOut, pRenderIn);
DsError.ThrowExceptionForHR(hr);
// Connect the Still pin to the sample grabber
hr = m_FilterGraph.Connect(m_pinStill, pSampleIn);
DsError.ThrowExceptionForHR(hr);
}
// Learn the video properties
SaveSizeInfo(sampGrabber);
ConfigVideoWindow(hControl);
// Start the graph
IMediaControl mediaCtrl = m_FilterGraph as IMediaControl;
hr = mediaCtrl.Run();
DsError.ThrowExceptionForHR(hr);
}
finally
{
if (sampGrabber != null)
{
Marshal.ReleaseComObject(sampGrabber);
sampGrabber = null;
}
if (pCaptureOut != null)
{
Marshal.ReleaseComObject(pCaptureOut);
pCaptureOut = null;
}
if (pRenderIn != null)
{
Marshal.ReleaseComObject(pRenderIn);
pRenderIn = null;
}
if (pSampleIn != null)
{
Marshal.ReleaseComObject(pSampleIn);
pSampleIn = null;
}
}
}
private void WorkerThread(bool runGraph)
{
VideoSourceFinishedReasonType reasonToStop = VideoSourceFinishedReasonType.StoppedByUser;
bool isSapshotSupported = false;
// grabber
Grabber videoGrabber = new Grabber(this, false);
Grabber snapshotGrabber = new Grabber(this, true);
// objects
object captureGraphObject = null;
object graphObject = null;
object videoGrabberObject = null;
object snapshotGrabberObject = null;
// interfaces
ICaptureGraphBuilder2 captureGraph = null;
IFilterGraph2 graph = null;
IBaseFilter sourceBase = null;
IBaseFilter videoGrabberBase = null;
IBaseFilter snapshotGrabberBase = null;
ISampleGrabber videoSampleGrabber = null;
ISampleGrabber snapshotSampleGrabber = null;
IMediaControl mediaControl = null;
IAMVideoControl videoControl = null;
IMediaEventEx mediaEvent = null;
IPin pinStillImage = null;
try
{
// get type of capture graph builder
Type type = Type.GetTypeFromCLSID(Clsid.CaptureGraphBuilder2);
if (type == null)
{
throw new ApplicationException("Failed creating capture graph builder");
}
// create capture graph builder
captureGraphObject = Activator.CreateInstance(type);
captureGraph = (ICaptureGraphBuilder2)captureGraphObject;
// get type of filter graph
type = Type.GetTypeFromCLSID(Clsid.FilterGraph);
if (type == null)
{
throw new ApplicationException("Failed creating filter graph");
}
// create filter graph
graphObject = Activator.CreateInstance(type);
graph = (IFilterGraph2)graphObject;
// set filter graph to the capture graph builder
captureGraph.SetFiltergraph((IGraphBuilder)graph);
// create source device's object
sourceObject = FilterInfo.CreateFilter(deviceMoniker);
if (sourceObject == null)
{
throw new ApplicationException("Failed creating device object for moniker");
}
// get base filter interface of source device
sourceBase = (IBaseFilter)sourceObject;
// get video control interface of the device
try
{
videoControl = (IAMVideoControl)sourceObject;
}
catch
{
// some camera drivers may not support IAMVideoControl interface
}
// get type of sample grabber
type = Type.GetTypeFromCLSID(Clsid.SampleGrabber);
if (type == null)
{
throw new ApplicationException("Failed creating sample grabber");
}
// create sample grabber used for video capture
videoGrabberObject = Activator.CreateInstance(type);
videoSampleGrabber = (ISampleGrabber)videoGrabberObject;
videoGrabberBase = (IBaseFilter)videoGrabberObject;
// create sample grabber used for snapshot capture
snapshotGrabberObject = Activator.CreateInstance(type);
snapshotSampleGrabber = (ISampleGrabber)snapshotGrabberObject;
snapshotGrabberBase = (IBaseFilter)snapshotGrabberObject;
// add source and grabber filters to graph
graph.AddFilter(sourceBase, "source");
graph.AddFilter(videoGrabberBase, "grabber_video");
graph.AddFilter(snapshotGrabberBase, "grabber_snapshot");
// set media type
AMMediaType mediaType = new AMMediaType();
mediaType.MajorType = MediaType.Video;
mediaType.SubType = MediaSubType.RGB24;
videoSampleGrabber.SetMediaType(mediaType);
snapshotSampleGrabber.SetMediaType(mediaType);
if (videoControl != null)
{
// find Still Image output pin of the vedio device
captureGraph.FindPin(sourceObject, PinDirection.Output,
PinCategory.StillImage, MediaType.Video, false, 0, out pinStillImage);
// check if it support trigger mode
if (pinStillImage != null)
{
VideoControlFlags caps;
videoControl.GetCaps(pinStillImage, out caps);
isSapshotSupported = ((caps & VideoControlFlags.ExternalTriggerEnable) != 0);
}
}
// configure video sample grabber
videoSampleGrabber.SetBufferSamples(false);
videoSampleGrabber.SetOneShot(false);
videoSampleGrabber.SetCallback(videoGrabber, 1);
// configure snapshot sample grabber
snapshotSampleGrabber.SetBufferSamples(true);
snapshotSampleGrabber.SetOneShot(false);
snapshotSampleGrabber.SetCallback(snapshotGrabber, 1);
// configure pins
GetPinCapabilitiesAndConfigureSizeAndRate(captureGraph, sourceBase,
PinCategory.Capture, desiredFrameSize, desiredFrameRate, ref videoCapabilities);
if (isSapshotSupported)
{
GetPinCapabilitiesAndConfigureSizeAndRate(captureGraph, sourceBase,
PinCategory.StillImage, desiredSnapshotSize, 0, ref snapshotCapabilities);
}
else
{
snapshotCapabilities = new VideoCapabilities[0];
}
if (runGraph)
{
// render capture pin
captureGraph.RenderStream(PinCategory.Capture, MediaType.Video, sourceBase, null, videoGrabberBase);
if (videoSampleGrabber.GetConnectedMediaType(mediaType) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
videoGrabber.Width = vih.BmiHeader.Width;
videoGrabber.Height = vih.BmiHeader.Height;
mediaType.Dispose();
}
if ((isSapshotSupported) && (provideSnapshots))
{
// render snapshot pin
captureGraph.RenderStream(PinCategory.StillImage, MediaType.Video, sourceBase, null, snapshotGrabberBase);
if (snapshotSampleGrabber.GetConnectedMediaType(mediaType) == 0)
{
VideoInfoHeader vih = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.FormatPtr, typeof(VideoInfoHeader));
snapshotGrabber.Width = vih.BmiHeader.Width;
snapshotGrabber.Height = vih.BmiHeader.Height;
mediaType.Dispose();
}
}
// get media control
mediaControl = (IMediaControl)graphObject;
// get media events' interface
mediaEvent = (IMediaEventEx)graphObject;
IntPtr p1, p2;
DsEvCode code;
// run
mediaControl.Run();
if ((isSapshotSupported) && (provideSnapshots))
{
startTime = DateTime.Now;
videoControl.SetMode(pinStillImage, VideoControlFlags.ExternalTriggerEnable);
}
while (!stopEvent.WaitOne(0, false))
{
Thread.Sleep(100);
if (mediaEvent != null)
{
if (mediaEvent.GetEvent(out code, out p1, out p2, 0) >= 0)
{
mediaEvent.FreeEventParams(code, p1, p2);
if (code == DsEvCode.DeviceLost)
{
reasonToStop = VideoSourceFinishedReasonType.DeviceLost;
break;
}
}
}
if (needToSimulateTrigger)
{
needToSimulateTrigger = false;
if ((isSapshotSupported) && (provideSnapshots))
{
videoControl.SetMode(pinStillImage, VideoControlFlags.Trigger);
}
}
if (needToDisplayPropertyPage)
{
needToDisplayPropertyPage = false;
try
{
// retrieve ISpecifyPropertyPages interface of the device
ISpecifyPropertyPages pPropPages = (ISpecifyPropertyPages)sourceObject;
// get property pages from the property bag
CAUUID caGUID;
pPropPages.GetPages(out caGUID);
// get filter info
FilterInfo filterInfo = new FilterInfo(deviceMoniker);
// create and display the OlePropertyFrame
Win32.OleCreatePropertyFrame(parentWindowForPropertyPage, 0, 0, filterInfo.Name, 1, ref sourceObject, caGUID.cElems, caGUID.pElems, 0, 0, IntPtr.Zero);
// release COM objects
Marshal.FreeCoTaskMem(caGUID.pElems);
}
catch
{
}
}
}
mediaControl.Stop();
}
}
catch (Exception exception)
{
// provide information to clients
if (VideoSourceException != null)
{
VideoSourceException(this, new VideoSourceExceptionEventArgs(exception.Message));
}
}
finally
{
// release all objects
captureGraph = null;
graph = null;
sourceBase = null;
mediaControl = null;
videoControl = null;
mediaEvent = null;
pinStillImage = null;
videoGrabberBase = null;
snapshotGrabberBase = null;
videoSampleGrabber = null;
snapshotSampleGrabber = null;
if (graphObject != null)
{
Marshal.ReleaseComObject(graphObject);
graphObject = null;
}
if (sourceObject != null)
{
Marshal.ReleaseComObject(sourceObject);
sourceObject = null;
}
if (videoGrabberObject != null)
{
Marshal.ReleaseComObject(videoGrabberObject);
videoGrabberObject = null;
}
if (snapshotGrabberObject != null)
{
Marshal.ReleaseComObject(snapshotGrabberObject);
snapshotGrabberObject = null;
}
if (captureGraphObject != null)
{
Marshal.ReleaseComObject(captureGraphObject);
captureGraphObject = null;
}
}
if (VideoSourceFinished != null)
{
VideoSourceFinished(this, new VideoSourceFinishedEventArgs(reasonToStop));
}
}
