// This method changed to work with Windows 7
// Under this OS, the MPEG-2 Demux now have dozens of outputs pins.
// Rendering all of them is not a good solution.
// The rendering process must be more smart...
private void ConnectFilters()
{
int hr = 0;
int pinNumber = 0;
IPin pinOut, pinIn;
// After the rendering process, our 4 downstream filters must be rendered
bool bdaTIFRendered = false;
bool bdaSecTabRendered = false;
bool audioRendered = false;
bool videoRendered = false;
// for each output pins...
while (true)
{
pinOut = DsFindPin.ByDirection(mpeg2Demux, PinDirection.Output, pinNumber);
// Is the last pin reached ?
if (pinOut == null)
{
break;
}
IEnumMediaTypes enumMediaTypes = null;
AMMediaType[] mediaTypes = new AMMediaType[1];
try
{
// Get Pin's MediaType enumerator
hr = pinOut.EnumMediaTypes(out enumMediaTypes);
DsError.ThrowExceptionForHR(hr);
// for each media types...
while (enumMediaTypes.Next(mediaTypes.Length, mediaTypes, IntPtr.Zero) == 0)
{
// Store the majortype and the subtype and free the structure
Guid majorType = mediaTypes[0].majorType;
Guid subType = mediaTypes[0].subType;
DsUtils.FreeAMMediaType(mediaTypes[0]);
if (majorType == MediaType.Audio)
{
// Is the Audio already rendered ?
if (!audioRendered)
{
// Get the first input pin
pinIn = DsFindPin.ByDirection(audioRenderer, PinDirection.Input, 0);
// Render it with IntelliConnect (a decoder should be added between the two filters.
hr = graphBuilder.Connect(pinOut, pinIn);
DsError.ThrowExceptionForHR(hr);
// Release the Pin
Marshal.ReleaseComObject(pinIn);
pinIn = null;
// Notify that the audio renderer is connected
audioRendered = true;
}
}
else if (majorType == MediaType.Video)
{
// Is the Video already rendered ?
if (!videoRendered)
{
// Get the first input pin
pinIn = DsFindPin.ByDirection(videoRenderer, PinDirection.Input, 0);
// Render it with IntelliConnect (a decoder should be added between the two filters.
hr = graphBuilder.Connect(pinOut, pinIn);
DsError.ThrowExceptionForHR(hr);
// Release the Pin
Marshal.ReleaseComObject(pinIn);
pinIn = null;
// Notify that the video renderer is connected
videoRendered = true;
}
}
else if (majorType == MediaType.Mpeg2Sections)
{
if (subType == MediaSubType.Mpeg2Data)
{
// Is the MPEG-2 Sections and Tables Filter already rendered ?
if (!bdaSecTabRendered)
{
// Get the first input pin
pinIn = DsFindPin.ByDirection(bdaSecTab, PinDirection.Input, 0);
// A direct connection is enough
hr = graphBuilder.ConnectDirect(pinOut, pinIn, null);
DsError.ThrowExceptionForHR(hr);
// Release the Pin
Marshal.ReleaseComObject(pinIn);
pinIn = null;
// Notify that the MPEG-2 Sections and Tables Filter is connected
bdaSecTabRendered = true;
}
}
// This sample only support DVB-T or DVB-S so only supporting this subtype is enough.
// If you want to support ATSC or ISDB, don't forget to handle these network types.
else if (subType == MediaSubType.DvbSI)
{
// Is the BDA MPEG-2 Transport Information Filter already rendered ?
if (!bdaTIFRendered)
{
// Get the first input pin
pinIn = DsFindPin.ByDirection(bdaTIF, PinDirection.Input, 0);
// A direct connection is enough
hr = graphBuilder.ConnectDirect(pinOut, pinIn, null);
DsError.ThrowExceptionForHR(hr);
// Release the Pin
Marshal.ReleaseComObject(pinIn);
pinIn = null;
// Notify that the BDA MPEG-2 Transport Information Filter is connected
bdaTIFRendered = true;
}
}
}
}
}
finally
{
// Free COM objects
Marshal.ReleaseComObject(enumMediaTypes);
enumMediaTypes = null;
Marshal.ReleaseComObject(pinOut);
pinOut = null;
}
// Next pin, please !
pinNumber++;
}
}
public void SetUpForTs(ISampleGrabberCB grabber, int methodToCall)
{
FilterGraphTools.DisconnectPins(mpeg2Demux);
//FilterGraphTools.DisconnectPins(demodulator);
FilterGraphTools.DisconnectPins(audioRenderer);
FilterGraphTools.DisconnectPins(videoRenderer);
//graphBuilder.RemoveFilter(audioRenderer);
//graphBuilder.RemoveFilter(videoRenderer);
sampleGrabber = (ISampleGrabber) new SampleGrabber();
AMMediaType media = new AMMediaType();
media.majorType = MediaType.Stream;
media.subType = MediaSubType.Mpeg2Transport;
media.formatType = FormatType.MpegStreams;
sampleGrabber.SetOneShot(false);
sampleGrabber.SetBufferSamples(true);
int hr = sampleGrabber.SetMediaType(media);
DsError.ThrowExceptionForHR(hr);
graphBuilder.AddFilter((IBaseFilter)sampleGrabber, "Sample Grabber");
nullRenderer = (IBaseFilter) new NullRenderer();
graphBuilder.AddFilter(nullRenderer, "NULL Renderer");
IPin pinIn = DsFindPin.ByName((IBaseFilter)sampleGrabber, "Input");
IPin pinOut = DsFindPin.ByDirection(capture, PinDirection.Output, 0);
IEnumMediaTypes eMedia;
pinOut.EnumMediaTypes(out eMedia);
AMMediaType[] mediaTypes = new AMMediaType[1];
eMedia.Next(mediaTypes.Length, mediaTypes, IntPtr.Zero);
hr = sampleGrabber.SetMediaType(mediaTypes[0]);
DsError.ThrowExceptionForHR(hr);
pinOut.Disconnect();
PinInfo info;
pinOut.QueryPinInfo(out info);
hr = graphBuilder.ConnectDirect(pinOut, pinIn, mediaTypes[0]);
//hr = graphBuilder.Connect(pinOut, pinIn);
DsError.ThrowExceptionForHR(hr);
// Release the Pin
Marshal.ReleaseComObject(pinIn);
pinIn = DsFindPin.ByName(nullRenderer, "In");
pinOut = DsFindPin.ByName((IBaseFilter)sampleGrabber, "Output");
hr = graphBuilder.Connect(pinOut, pinIn);
DsError.ThrowExceptionForHR(hr);
sampleGrabber.SetCallback(grabber, methodToCall);
// Release the Pin
Marshal.ReleaseComObject(pinIn);
pinIn = null;
}