S.No	Tasks completed
1	sample application for loading JPEG,BMP images using Windows SDK	VC++
2	Source Filter for displaying numbers on the screen…	completed
3	Source filter for displaying the image file Source	completed

30 –March-2007….

Problems faced …

Directshow Source Filter development :

While developing the filter I got The error as the

I developed the source filter for displaying numbers on the screen...

The code related to this ...

But I faced the following problem...

---------------------------

GraphEdit

---------------------------

Sorry, the Filter Graph cannot render this pin.

Class not registered (Return code: 0x80040154)

---------------------------

OK

---------------------------

HRESULT CMySourceStream::GetMediaType(CMediaType* pMediaType)

{

try

{

HRESULT hr = S_OK;

CheckPointer(pMediaType,E_POINTER);

OutputDebugString("n CMySourceStream::GetMediaType() fn");

ZeroMemory(pMediaType,sizeof(CMediaType));

VIDEOINFO *pvi = (VIDEOINFO*)pMediaType->AllocFormatBuffer(sizeof(VIDEOINFO));

pvi->bmiHeader.biCompression = BI_RGB;

pvi->bmiHeader.biBitCount = 24;

pvi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);

pvi->bmiHeader.biWidth = 300;

pvi->bmiHeader.biHeight = 300;

pvi->bmiHeader.biPlanes = 1;

pvi->bmiHeader.biSizeImage = pvi->bmiHeader.biWidth * pvi->bmiHeader.biHeight * (pvi->bmiHeader.biBitCount/8);

pvi->bmiHeader.biClrImportant = 0;

SetRectEmpty(&(pvi->rcSource));

SetRectEmpty(&(pvi->rcTarget));

pMediaType->SetType(&MEDIATYPE_Video);

pMediaType->SetFormatType(&FORMAT_VideoInfo);

pMediaType->SetTemporalCompression(FALSE);

//pMediaType->SetSubtype(&MEDIASUBTYPE_Vi)

const GUID SubTypeGUID = GetBitmapSubtype(&pvi->bmiHeader);

pMediaType->SetSubtype(&SubTypeGUID);

pMediaType->SetSampleSize(pvi->bmiHeader.biSizeImage);

m_bmpInfo.bmiHeader = pvi->bmiHeader;

return hr;

}

catch(...)

{

OutputDebugString("n Errror in CMySourceStream::GetMediaType() fn");

return E_FAIL;

}

}

Solution :

--------------

1.I added the checkMediaType() fn as follows...

CheckMediaType() is an important Function for any filter....

without it, the filter will not work...

HRESULT CMySourceStream::CheckMediaType(const CMediaType *pMediaType)

{

CheckPointer(pMediaType,E_POINTER);

try

{

OutputDebugString("n CheckMediaType fn...");

if((*(pMediaType->Type()) != MEDIATYPE_Video) || // we only output video

!(pMediaType->IsFixedSize())) // in fixed size samples

{

return E_INVALIDARG;

}

// Check for the subtypes we support

const GUID *SubType = pMediaType->Subtype();

if (SubType == NULL)

return E_INVALIDARG;

if(*SubType != MEDIASUBTYPE_RGB24)

{

return E_INVALIDARG;

}

// Get the format area of the media type

VIDEOINFO *pvi = (VIDEOINFO *) pMediaType->Format();

if(pvi == NULL)

return E_INVALIDARG;

if(pvi->bmiHeader.biBitCount==24)

return NOERROR;

else

return E_INVALIDARG;

}

catch(...)

{

OutputDebugString("n Exception in CheckMediaType() fn...");

return E_INVALIDARG;

}

}

S.No	Tasks To be Done Next
1	Identify the time taken for filter's processing per frame…
2	look at WMINTF
3	Prepare Class diagram and Architecture Diagram for Ur Directshow filters
4	Prepare DFD for ur directshow filters
5	Prepare Documentation
6	Directshow source filter for screen capturing
7	Add File Dialog to Directshow Image File source filter
8	Add histogram and property dialog to the filter
1	Sample application for displaying numbers on the screen	D:samplesSDKBitmapTest
2	Sample application for source filter	SnakeSource filter on Desktop…
3	Directshow source filter	D:samplesSourceFilter

S.No	Puzzle
1	There are 3 glasses. The biggest one can hold 24 ounces. The medium one can hold 11 ounces and the smallest one can hold 5 ounces. Now you have 24 ounces of soft drink in the largest glass. Can you use just these 3 glasses to make the largest glass contain 12 ounces of soft drink by pouring soft drink from one glass to another?
	Ans	24ounce	11 ounce	5 ounce
	24ounce is filled	24	0	0	Initial State
		13	11	0	From 24 ounce, Fill the 11 ounce
		18	6	0
		18	1	5
		23	1	0
		23	0	1
		12	11	1	Target state