Filter Problem

Hi,

I am trying to set up a small filter chain of two filters. The first one is a color classification filter, which takes an RGB24 image and converts it into a RGB8 image (of course does some color lookup and so on too).
The second one is the binarization filter from the samples.

I have set up the input and output type methods as follows:

void CColorClassifierFilter::getSupportedInputTypes( DShowLib::FrameTypeInfoArray& arr ) const
{
	// This filter works for 24-bit-color images only
	arr.addFrameType( eRGB24 );

}

bool CColorClassifierFilter::getTransformOutputTypes( const DShowLib::FrameTypeInfo& in_type,					   DShowLib::FrameTypeInfoArray& out_types ) const
{
	
	
	FrameTypeInfo out_type = eRGB8;

	out_type.dim = in_type.dim;
	out_type.buffersize = out_type.dim.cx * out_type.dim.cy;
	
	out_types.push_back( out_type );

	return true;
}

and

void CBinarizationFilter::getSupportedInputTypes( DShowLib::FrameTypeInfoArray& arr ) const
{
	// This filter works for 8-bit-gray images only
	
	
	arr.push_back( eRGB8 );

}

bool CBinarizationFilter::getTransformOutputTypes( const DShowLib::FrameTypeInfo& in_type, DShowLib::FrameTypeInfoArray& out_types ) const
{
	// We don't change the image type, output = input
	out_types.push_back( in_type );

	return true;
}

When I run them seperatly they work fine. If I hook them together like:

// Set filter parameters.
	tFrameFilterList filterList;

	// Use .get to extract a plain pointer from the smart pointer.
  	filterList.push_back( &m_binarizationFilter );
	filterList.push_back( &m_ColorClassifierFilter );	



	m_Grabber.setDeviceFrameFilters( filterList );

The program hangs (or is caught in an endless loop) and writes the following error messages to the debugger:

TffdshowBase::Constructor
TffdshowDecVideo::Constructor
Join filter graph
CheckInputType: , 1024, 768
CheckInputType: , 1024, 768
CheckInputType:  , 1024, 768
CheckInputType:  , 1024, 768
CheckInputType: , 1024, 768
Removed from filter graph
Destructor

or

TffdshowBase::Constructor
TffdshowDecVideo::Constructor
Join filter graph
CheckInputType: , 1024, 768
CheckInputType: Y800, 1024, 768
Removed from filter graph
Destructor

Any idea what I am doing wrong???
If I change the order of the Filters I get an (expected) exception....

Thanks in advance for any suggestions...

Fabian

[fab]

Hi...

I actually got this problem fixed...
Seems like I was a bit overworked yesterday...

Of course the order of the filters DO work the other way round...
The exception I got then, had to do with some idiotic fumbling of mine with pointer indices...
;)

so never mind to delete the whole post since it wouldnt help anyone I guess...

[Stefan Geissler]

Fabian,

Thank you for the thread, i think it is interesting and wont delete it!