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11//                For Open Source Computer Vision Library
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41
42#include "_cvaux.h"
43
44CV_IMPL void
45cvDeInterlace( const CvArr* framearr, CvArr* fieldEven, CvArr* fieldOdd )
46{
47    CV_FUNCNAME("cvDeInterlace");
48
49    __BEGIN__;
50
51    CvMat frame_stub, *frame = (CvMat*)framearr;
52    CvMat even_stub, *even = (CvMat*)fieldEven;
53    CvMat odd_stub, *odd = (CvMat*)fieldOdd;
54    CvSize size;
55    int y;
56
57    CV_CALL( frame = cvGetMat( frame, &frame_stub ));
58    CV_CALL( even = cvGetMat( even, &even_stub ));
59    CV_CALL( odd = cvGetMat( odd, &odd_stub ));
60
61    if( !CV_ARE_TYPES_EQ( frame, even ) || !CV_ARE_TYPES_EQ( frame, odd ))
62        CV_ERROR( CV_StsUnmatchedFormats, "All the input images must have the same type" );
63
64    if( frame->cols != even->cols || frame->cols != odd->cols ||
65        frame->rows != even->rows*2 || odd->rows != even->rows )
66        CV_ERROR( CV_StsUnmatchedSizes, "Uncorrelated sizes of the input image and output fields" );
67
68    size = cvGetMatSize( even );
69    size.width *= CV_ELEM_SIZE( even->type );
70
71    for( y = 0; y < size.height; y++ )
72    {
73        memcpy( even->data.ptr + even->step*y,
74                frame->data.ptr + frame->step*y*2, size.width );
75        memcpy( odd->data.ptr + even->step*y,
76                frame->data.ptr + frame->step*(y*2+1), size.width );
77    }
78
79    __END__;
80}
81
82/* End of file. */
83
84
85