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#include "_cvaux.h"

#include <float.h>
#include "_cvutils.h"

CV_IMPL void
cvDeInterlace( IplImage* frame, IplImage* fieldEven, IplImage* fieldOdd )
{

    CV_FUNCNAME("icvDeInterlace");
    
    __BEGIN__;

    uchar *framedata, *f0data, *f1data;
    int framestep = 0, f0step = 0, f1step = 0;
    CvSize framesize, f0size, f1size;
    int y;

    if( !frame || !fieldEven || !fieldOdd )
        CV_ERROR_FROM_STATUS( CV_NULLPTR_ERR );

    cvGetImageRawData( frame, &framedata, &framestep, &framesize );
    cvGetImageRawData( fieldEven, &f0data, &f0step, &f0size );
    cvGetImageRawData( fieldOdd, &f1data, &f1step, &f1size );

    if( f0size.width != f1size.width ||
        f0size.height != f1size.height ||
        f0size.width != framesize.width ||
        f0size.height != framesize.height/2 )
        CV_ERROR( CV_StsBadArg,
        "source image and destination image have incorrect combination of sizes" );

    if( frame->depth != fieldEven->depth ||
        frame->depth != fieldOdd->depth )
        CV_ERROR_FROM_STATUS( CV_UNMATCHED_FORMATS_ERR );

    if( frame->nChannels != fieldEven->nChannels ||
        frame->nChannels != fieldOdd->nChannels )
        CV_ERROR_FROM_STATUS( CV_UNMATCHED_FORMATS_ERR );

    f0size.width *= icvGetBtPix( frame );

    for( y = 0; y < f0size.height; y++, framedata += frame->widthStep*2,
                                        f0data += f0step, f1data += f1step )
    {
        memcpy( f0data, framedata, f0size.width );
        memcpy( f1data, framedata + frame->widthStep, f0size.width );
    }  

    __CLEANUP__;
    __END__;
}

/* End of file. */


