private void loadVideo(String videoPath)
{
videoFilepath = videoPath;
videoFileName.Text = getDisplayVideoName();
if (graph != null)
{
graph = null;
}
if (mediaControl != null)
{
// Stop media playback
this.mediaControl.Stop();
mediaControl = null;
}
if (videoWindow != null)
{
videoWindow.put_Owner(IntPtr.Zero);
videoWindow = null;
}
if (mediaSeeking != null)
{
mediaSeeking = null;
}
if (basicAudio != null)
{
basicAudio = null;
}
GC.Collect();
/* if (mediaPosition != null)
{
mediaPosition = null;
}*/
graph = (IGraphBuilder)new FilterGraph();
mediaControl = (IMediaControl)graph;
//mediaPosition = (IMediaPosition)graph;
videoWindow = (IVideoWindow)graph;
mediaSeeking = (IMediaSeeking)graph;
basicAudio = (IBasicAudio)graph;
AviSplitter spliter = new AviSplitter();
graph.AddFilter((IBaseFilter)spliter, null);
graph.RenderFile(videoPath, null);
graph.SetDefaultSyncSource();
/*
* AMSeekingSeekingCapabilities cap = AMSeekingSeekingCapabilities.CanGetCurrentPos;
if (mediaSeeking.CheckCapabilities(ref cap) > 0)
{
this.consoleErreur.AppendText("Impossible de recuperer la position de la frame");
}
* */
videoWindow.put_Owner(videoPanel.Handle);
videoWindow.put_MessageDrain(videoPanel.Handle);
videoWindow.put_WindowStyle(WindowStyle.Child);
videoWindow.put_WindowStyleEx(WindowStyleEx.ControlParent);
videoWindow.put_Left(0);
videoWindow.put_Top(0);
videoWindow.put_Width(videoPanel.Width);
videoWindow.put_Height(videoPanel.Height);
//positionTrackbar.Enabled = true;
speedTrackBar.Enabled = true;
mediaSeeking.SetTimeFormat(TimeFormat.Frame);
double rate;
mediaSeeking.GetRate(out rate);
rateText.Text = rate.ToString();
speedTrackBar.Value = (int)(speedTrackBar.Maximum * rate / 2);
trackBar1.Value = trackBar1.Maximum / 2;
this.basicAudio.put_Volume(-5000 + 5000 * trackBar1.Value / trackBar1.Maximum);
//mediaPosition.put_Rate(0.5);
running = false;
frameChanged = false;
}
/// <summary> build the capture graph for grabber. </summary>
private void SetupGraph(string FileName)
{
int hr;
// Get the graphbuilder object
this.graphBuilder = new FilterGraph() as IGraphBuilder;
this.mediaControl = this.graphBuilder as IMediaControl;
this.mediaSeeking = this.graphBuilder as IMediaSeeking;
this.mediaEvent = this.graphBuilder as IMediaEvent;
try
{
// Get the SampleGrabber interface
this.sampleGrabber = new SampleGrabber() as ISampleGrabber;
this.sampleGrabberFilter = sampleGrabber as IBaseFilter;
ConfigureSampleGrabber(sampleGrabber);
// Add the frame grabber to the graph
hr = graphBuilder.AddFilter(sampleGrabberFilter, "Ds.NET Sample Grabber");
DsError.ThrowExceptionForHR(hr);
IBaseFilter aviSplitter = new AviSplitter() as IBaseFilter;
// Add the aviSplitter to the graph
hr = graphBuilder.AddFilter(aviSplitter, "Splitter");
DsError.ThrowExceptionForHR(hr);
// Have the graph builder construct its appropriate graph automatically
hr = this.graphBuilder.RenderFile(FileName, null);
DsError.ThrowExceptionForHR(hr);
#if DEBUG
m_rot = new DsROTEntry(graphBuilder);
#endif
// Remove the video renderer filter
IBaseFilter defaultVideoRenderer = null;
graphBuilder.FindFilterByName("Video Renderer", out defaultVideoRenderer);
graphBuilder.RemoveFilter(defaultVideoRenderer);
// Disconnect anything that is connected
// to the output of the sample grabber
IPin iPinSampleGrabberOut = DsFindPin.ByDirection(sampleGrabberFilter, PinDirection.Output, 0);
IPin iPinVideoIn;
hr = iPinSampleGrabberOut.ConnectedTo(out iPinVideoIn);
if (hr == 0)
{
// Disconnect the sample grabber output from the attached filters
hr = iPinVideoIn.Disconnect();
DsError.ThrowExceptionForHR(hr);
hr = iPinSampleGrabberOut.Disconnect();
DsError.ThrowExceptionForHR(hr);
}
else
{
// Try other way round because automatic renderer could not build
// graph including the sample grabber
IPin iPinAVISplitterOut = DsFindPin.ByDirection(aviSplitter, PinDirection.Output, 0);
IPin iPinAVISplitterIn;
hr = iPinAVISplitterOut.ConnectedTo(out iPinAVISplitterIn);
DsError.ThrowExceptionForHR(hr);
hr = iPinAVISplitterOut.Disconnect();
DsError.ThrowExceptionForHR(hr);
hr = iPinAVISplitterIn.Disconnect();
DsError.ThrowExceptionForHR(hr);
// Connect the avi splitter output to sample grabber
IPin iPinSampleGrabberIn = DsFindPin.ByDirection(sampleGrabberFilter, PinDirection.Input, 0);
hr = graphBuilder.Connect(iPinAVISplitterOut, iPinSampleGrabberIn);
DsError.ThrowExceptionForHR(hr);
}
// Add the null renderer to the graph
nullrenderer = new NullRenderer() as IBaseFilter;
hr = graphBuilder.AddFilter(nullrenderer, "Null renderer");
DsError.ThrowExceptionForHR(hr);
// Get the input pin of the null renderer
IPin iPinNullRendererIn = DsFindPin.ByDirection(nullrenderer, PinDirection.Input, 0);
// Connect the sample grabber to the null renderer
hr = graphBuilder.Connect(iPinSampleGrabberOut, iPinNullRendererIn);
DsError.ThrowExceptionForHR(hr);
// Read and cache the image sizes
SaveSizeInfo(sampleGrabber);
this.GetFrameStepInterface();
}
finally
{
}
}
/// <summary> build the capture graph for grabber. </summary>
private void SetupGraph(string FileName)
{
int hr;
// Get the graphbuilder object
this.graphBuilder = new FilterGraph() as IGraphBuilder;
this.mediaControl = this.graphBuilder as IMediaControl;
this.mediaSeeking = this.graphBuilder as IMediaSeeking;
this.mediaEvent = this.graphBuilder as IMediaEvent;
try
{
// Get the SampleGrabber interface
this.sampleGrabber = new SampleGrabber() as ISampleGrabber;
this.sampleGrabberFilter = sampleGrabber as IBaseFilter;
ConfigureSampleGrabber(sampleGrabber);
// Add the frame grabber to the graph
hr = graphBuilder.AddFilter(sampleGrabberFilter, "Ds.NET Sample Grabber");
DsError.ThrowExceptionForHR(hr);
IBaseFilter aviSplitter = new AviSplitter() as IBaseFilter;
// Add the aviSplitter to the graph
hr = graphBuilder.AddFilter(aviSplitter, "Splitter");
DsError.ThrowExceptionForHR(hr);
// Have the graph builder construct its appropriate graph automatically
hr = this.graphBuilder.RenderFile(FileName, null);
DsError.ThrowExceptionForHR(hr);
#if DEBUG
m_rot = new DsROTEntry(graphBuilder);
#endif
// Remove the video renderer filter
IBaseFilter defaultVideoRenderer = null;
graphBuilder.FindFilterByName("Video Renderer", out defaultVideoRenderer);
graphBuilder.RemoveFilter(defaultVideoRenderer);
// Disconnect anything that is connected
// to the output of the sample grabber
IPin iPinSampleGrabberOut = DsFindPin.ByDirection(sampleGrabberFilter, PinDirection.Output, 0);
IPin iPinVideoIn;
hr = iPinSampleGrabberOut.ConnectedTo(out iPinVideoIn);
if (hr == 0)
{
// Disconnect the sample grabber output from the attached filters
hr = iPinVideoIn.Disconnect();
DsError.ThrowExceptionForHR(hr);
hr = iPinSampleGrabberOut.Disconnect();
DsError.ThrowExceptionForHR(hr);
}
else
{
// Try other way round because automatic renderer could not build
// graph including the sample grabber
IPin iPinAVISplitterOut = DsFindPin.ByDirection(aviSplitter, PinDirection.Output, 0);
IPin iPinAVISplitterIn;
hr = iPinAVISplitterOut.ConnectedTo(out iPinAVISplitterIn);
DsError.ThrowExceptionForHR(hr);
hr = iPinAVISplitterOut.Disconnect();
DsError.ThrowExceptionForHR(hr);
hr = iPinAVISplitterIn.Disconnect();
DsError.ThrowExceptionForHR(hr);
// Connect the avi splitter output to sample grabber
IPin iPinSampleGrabberIn = DsFindPin.ByDirection(sampleGrabberFilter, PinDirection.Input, 0);
hr = graphBuilder.Connect(iPinAVISplitterOut, iPinSampleGrabberIn);
DsError.ThrowExceptionForHR(hr);
}
// Add the null renderer to the graph
nullrenderer = new NullRenderer() as IBaseFilter;
hr = graphBuilder.AddFilter(nullrenderer, "Null renderer");
DsError.ThrowExceptionForHR(hr);
// Get the input pin of the null renderer
IPin iPinNullRendererIn = DsFindPin.ByDirection(nullrenderer, PinDirection.Input, 0);
// Connect the sample grabber to the null renderer
hr = graphBuilder.Connect(iPinSampleGrabberOut, iPinNullRendererIn);
DsError.ThrowExceptionForHR(hr);
// Read and cache the image sizes
SaveSizeInfo(sampleGrabber);
this.GetFrameStepInterface();
}
finally
{
}
}
