Capturing a still image from my camera into memory

Hi all,

I hope this is the right forum. I'm developing an application for smartphones in C++ that captures an still image from the camera. I found an example in the Windows Mobile SDK that does that.
It can be found here:
C:\Program Files\Windows Mobile 5.0 SDK R2\Samples\PocketPC\CPP\Win32\Cameracapture

My only problem is the image is captured into a file, and I need to have it in memory for further processing. However since I'm not familiar with DirectShow, I was wondering if you guys can help me in what I need to do to put it into memory. Here is the code that creates a file with the image:

Code:

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CGraphManager::CaptureStillImageInternal()
{
        HRESULT hr = S_OK;
        CComPtr<IFileSinkFilter> pFileSink;
        CComPtr<IUnknown>                pUnkCaptureFilter;
        CComPtr<IPin>                        pStillPin;
        CComPtr<IAMVideoControl> pVideoControl;

    if(( m_pCaptureGraphBuilder == NULL ) || ( m_fGraphBuilt == FALSE ))
    {
        ERR( E_FAIL );
    }

        CHK( m_pImageSinkFilter.QueryInterface( &pFileSink ));
        CHK( pFileSink->SetFileName( L"\\test.jpg", NULL ));

        CHK( m_pVideoCaptureFilter.QueryInterface( &pUnkCaptureFilter ));
        CHK( m_pCaptureGraphBuilder->FindPin( pUnkCaptureFilter, PINDIR_OUTPUT, &PIN_CATEGORY_STILL, &MEDIATYPE_Video, FALSE, 0, &pStillPin ));
        CHK( m_pVideoCaptureFilter.QueryInterface( &pVideoControl ));
        CHK( pVideoControl->SetMode( pStillPin, VideoControlFlag_Trigger ));

Cleanup:
        if( FAILED( hr ))
        {
                NotifyMessage( MESSAGE_ERROR, L"Capturing a still image failed" );
        }
    return hr;
}

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There has to be a place somewhere there where the image is stored into memory but I cannot find it. Hopefully with that piece of code should be enough for you guys to figure out how to get it. If you need more source coude please let me know.

Thanks a lot

You need to replace the File Sink filter with another renderer. Have a look at this page for a sample you can build on.

Quote:

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Originally Posted by TSYS

You need to replace the File Sink filter with another renderer. Have a look at this page for a sample you can build on.

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Thanks a lot.
That example seems to be exactly what I need, but the problem is I think it's only for Windows not for Windows Mobile. I have tried to compile it but I get all kind of errors.

I'm not familiar with Windows Mobile so I can't help you much more. But I hope the example I cited at least points you in the right direction, and that somebody else will follow up on this thread.