cvimgwarp.cpp

opencv库在TI DM6437上的移植,目前包括两个库cv.lib和cxcore.lib的工程

                if( (unsigned)(sx = sx0 + cn*2) < (unsigned)ssize.width )       \
                    x = load_macro(_src[sx]);                                   \
                row[dx] = sum + x*icvCubicCoeffs[(ICV_CUBIC_TAB_SIZE-ifx)*2+1]; \
            }                                                                   \
                                                                                \
            if( sy == 0 )                                                       \
                for( k1 = 0; k1 < k; k1++ )                                     \
                    memcpy( buf[k1], row, dsize.width*sizeof(row[0]));          \
        }                                                                       \
                                                                                \
        prev_sy2 = sy2;                                                         \
                                                                                \
        row0 = buf[0]; row1 = buf[1];                                           \
        row2 = buf[2]; row3 = buf[3];                                           \
                                                                                \
        w0 = icvCubicCoeffs[ify*2+1];                                           \
        w1 = icvCubicCoeffs[ify*2];                                             \
        w2 = icvCubicCoeffs[(ICV_CUBIC_TAB_SIZE - ify)*2];                      \
        w3 = icvCubicCoeffs[(ICV_CUBIC_TAB_SIZE - ify)*2 + 1];                  \
                                                                                \
        for( dx = 0; dx < dsize.width; dx++ )                                   \
        {                                                                       \
            worktype val = cast_macro1( row0[dx]*w0 + row1[dx]*w1 +             \
                                        row2[dx]*w2 + row3[dx]*w3 );            \
            dst[dx] = cast_macro2(val);                                         \
        }                                                                       \
    }                                                                           \
                                                                                \
    return CV_OK;                                                               \
}


ICV_DEF_RESIZE_BILINEAR_FUNC( 8u, uchar, int, ialpha,
                              ICV_WARP_MUL_ONE_8U, ICV_WARP_DESCALE_8U )
ICV_DEF_RESIZE_BILINEAR_FUNC( 16u, ushort, float, alpha, CV_NOP, cvRound )
ICV_DEF_RESIZE_BILINEAR_FUNC( 32f, float, float, alpha, CV_NOP, CV_NOP )

ICV_DEF_RESIZE_BICUBIC_FUNC( 8u, uchar, int, CV_8TO32F, cvRound, CV_CAST_8U )
ICV_DEF_RESIZE_BICUBIC_FUNC( 16u, ushort, int, CV_NOP, cvRound, CV_CAST_16U )
ICV_DEF_RESIZE_BICUBIC_FUNC( 32f, float, float, CV_NOP, CV_NOP, CV_NOP )

ICV_DEF_RESIZE_AREA_FAST_FUNC( 8u, uchar, int, cvRound )
ICV_DEF_RESIZE_AREA_FAST_FUNC( 16u, ushort, int, cvRound )
ICV_DEF_RESIZE_AREA_FAST_FUNC( 32f, float, float, CV_NOP )

ICV_DEF_RESIZE_AREA_FUNC( 8u, uchar, CV_8TO32F, cvRound )
ICV_DEF_RESIZE_AREA_FUNC( 16u, ushort, CV_NOP, cvRound )
ICV_DEF_RESIZE_AREA_FUNC( 32f, float, CV_NOP, CV_NOP )


static void icvInitResizeTab( CvFuncTable* bilin_tab,
                              CvFuncTable* bicube_tab,
                              CvFuncTable* areafast_tab,
                              CvFuncTable* area_tab )
{
    bilin_tab->fn_2d[CV_8U] = (void*)icvResize_Bilinear_8u_CnR;
    bilin_tab->fn_2d[CV_16U] = (void*)icvResize_Bilinear_16u_CnR;
    bilin_tab->fn_2d[CV_32F] = (void*)icvResize_Bilinear_32f_CnR;

    bicube_tab->fn_2d[CV_8U] = (void*)icvResize_Bicubic_8u_CnR;
    bicube_tab->fn_2d[CV_16U] = (void*)icvResize_Bicubic_16u_CnR;
    bicube_tab->fn_2d[CV_32F] = (void*)icvResize_Bicubic_32f_CnR;

    areafast_tab->fn_2d[CV_8U] = (void*)icvResize_AreaFast_8u_CnR;
    areafast_tab->fn_2d[CV_16U] = (void*)icvResize_AreaFast_16u_CnR;
    areafast_tab->fn_2d[CV_32F] = (void*)icvResize_AreaFast_32f_CnR;

    area_tab->fn_2d[CV_8U] = (void*)icvResize_Area_8u_CnR;
    area_tab->fn_2d[CV_16U] = (void*)icvResize_Area_16u_CnR;
    area_tab->fn_2d[CV_32F] = (void*)icvResize_Area_32f_CnR;
}


typedef CvStatus (CV_STDCALL * CvResizeBilinearFunc)
                    ( const void* src, int srcstep, CvSize ssize,
                      void* dst, int dststep, CvSize dsize,
                      int cn, int xmax, const CvResizeAlpha* xofs,
                      const CvResizeAlpha* yofs, float* buf0, float* buf1 );

typedef CvStatus (CV_STDCALL * CvResizeBicubicFunc)
                    ( const void* src, int srcstep, CvSize ssize,
                      void* dst, int dststep, CvSize dsize,
                      int cn, int xmin, int xmax,
                      const CvResizeAlpha* xofs, float** buf );

typedef CvStatus (CV_STDCALL * CvResizeAreaFastFunc)
                    ( const void* src, int srcstep, CvSize ssize,
                      void* dst, int dststep, CvSize dsize,
                      int cn, const int* ofs, const int *xofs );

typedef CvStatus (CV_STDCALL * CvResizeAreaFunc)
                    ( const void* src, int srcstep, CvSize ssize,
                      void* dst, int dststep, CvSize dsize,
                      int cn, const CvDecimateAlpha* xofs,
                      int xofs_count, float* buf, float* sum );


////////////////////////////////// IPP resize functions //////////////////////////////////

icvResize_8u_C1R_t icvResize_8u_C1R_p = 0;
icvResize_8u_C3R_t icvResize_8u_C3R_p = 0;
icvResize_8u_C4R_t icvResize_8u_C4R_p = 0;
icvResize_16u_C1R_t icvResize_16u_C1R_p = 0;
icvResize_16u_C3R_t icvResize_16u_C3R_p = 0;
icvResize_16u_C4R_t icvResize_16u_C4R_p = 0;
icvResize_32f_C1R_t icvResize_32f_C1R_p = 0;
icvResize_32f_C3R_t icvResize_32f_C3R_p = 0;
icvResize_32f_C4R_t icvResize_32f_C4R_p = 0;

typedef CvStatus (CV_STDCALL * CvResizeIPPFunc)
( const void* src, CvSize srcsize, int srcstep, CvRect srcroi,
  void* dst, int dststep, CvSize dstroi,
  double xfactor, double yfactor, int interpolation );

//////////////////////////////////////////////////////////////////////////////////////////

CV_IMPL void
cvResize( const CvArr* srcarr, CvArr* dstarr, int method )
{
    static CvFuncTable bilin_tab, bicube_tab, areafast_tab, area_tab;
    static int inittab = 0;
    void* temp_buf = 0;

    CV_FUNCNAME( "cvResize" );

    __BEGIN__;
    
    CvMat srcstub, *src = (CvMat*)srcarr;
    CvMat dststub, *dst = (CvMat*)dstarr;
    CvSize ssize, dsize;
    float scale_x, scale_y;
    int k, sx, sy, dx, dy;
    int type, depth, cn;
    
    CV_CALL( src = cvGetMat( srcarr, &srcstub ));
    CV_CALL( dst = cvGetMat( dstarr, &dststub ));
    
    if( CV_ARE_SIZES_EQ( src, dst ))
        CV_CALL( cvCopy( src, dst ));

    if( !CV_ARE_TYPES_EQ( src, dst ))
        CV_ERROR( CV_StsUnmatchedFormats, "" );

    if( !inittab )
    {
        icvInitResizeTab( &bilin_tab, &bicube_tab, &areafast_tab, &area_tab );
        inittab = 1;
    }

    ssize = cvGetMatSize( src );
    dsize = cvGetMatSize( dst );
    type = CV_MAT_TYPE(src->type);
    depth = CV_MAT_DEPTH(type);
    cn = CV_MAT_CN(type);
    scale_x = (float)ssize.width/dsize.width;
    scale_y = (float)ssize.height/dsize.height;

    if( method == CV_INTER_CUBIC &&
        (MIN(ssize.width, dsize.width) <= 4 ||
        MIN(ssize.height, dsize.height) <= 4) )
        method = CV_INTER_LINEAR;

    if( icvResize_8u_C1R_p &&
        MIN(ssize.width, dsize.width) > 4 &&
        MIN(ssize.height, dsize.height) > 4 )
    {
        CvResizeIPPFunc ipp_func =
            type == CV_8UC1 ? icvResize_8u_C1R_p :
            type == CV_8UC3 ? icvResize_8u_C3R_p :
            type == CV_8UC4 ? icvResize_8u_C4R_p :
            type == CV_16UC1 ? icvResize_16u_C1R_p :
            type == CV_16UC3 ? icvResize_16u_C3R_p :
            type == CV_16UC4 ? icvResize_16u_C4R_p :
            type == CV_32FC1 ? icvResize_32f_C1R_p :
            type == CV_32FC3 ? icvResize_32f_C3R_p :
            type == CV_32FC4 ? icvResize_32f_C4R_p : 0;
        if( ipp_func && (CV_INTER_NN < method && method < CV_INTER_AREA))
        {
            int srcstep = src->step ? src->step : CV_STUB_STEP;
            int dststep = dst->step ? dst->step : CV_STUB_STEP;
            IPPI_CALL( ipp_func( src->data.ptr, ssize, srcstep,
                                 cvRect(0,0,ssize.width,ssize.height),
                                 dst->data.ptr, dststep, dsize,
                                 (double)dsize.width/ssize.width,
                                 (double)dsize.height/ssize.height, 1 << method ));
            EXIT;
        }
    }

    if( method == CV_INTER_NN )
    {
        IPPI_CALL( icvResize_NN_8u_C1R( src->data.ptr, src->step, ssize,
                                        dst->data.ptr, dst->step, dsize,
                                        CV_ELEM_SIZE(src->type)));
    }
    else if( method == CV_INTER_LINEAR || method == CV_INTER_AREA )
    {
        if( method == CV_INTER_AREA &&
            ssize.width >= dsize.width && ssize.height >= dsize.height )
        {
            // "area" method for (scale_x > 1 & scale_y > 1)
            int iscale_x = cvRound(scale_x);
            int iscale_y = cvRound(scale_y);

            if( fabs(scale_x - iscale_x) < DBL_EPSILON &&
                fabs(scale_y - iscale_y) < DBL_EPSILON )
            {
                int area = iscale_x*iscale_y;
                int srcstep = src->step / CV_ELEM_SIZE(depth);
                int* ofs = (int*)cvStackAlloc( (area + dsize.width*cn)*sizeof(int) );
                int* xofs = ofs + area;
                CvResizeAreaFastFunc func = (CvResizeAreaFastFunc)areafast_tab.fn_2d[depth];

                if( !func )
                    CV_ERROR( CV_StsUnsupportedFormat, "" );
                
                for( sy = 0, k = 0; sy < iscale_y; sy++ )
                    for( sx = 0; sx < iscale_x; sx++ )
                        ofs[k++] = sy*srcstep + sx*cn;

                for( dx = 0; dx < dsize.width; dx++ )
                {
                    sx = dx*iscale_x*cn;
                    for( k = 0; k < cn; k++ )
                        xofs[dx*cn + k] = sx + k;
                }

                IPPI_CALL( func( src->data.ptr, src->step, ssize, dst->data.ptr,
                                 dst->step, dsize, cn, ofs, xofs ));
            }
            else
            {
                int buf_len = dsize.width*cn + 4, buf_size, xofs_count = 0;
                float scale = 1.f/(scale_x*scale_y);
                float *buf, *sum;
                CvDecimateAlpha* xofs;
                CvResizeAreaFunc func = (CvResizeAreaFunc)area_tab.fn_2d[depth];

                if( !func || cn > 4 )
                    CV_ERROR( CV_StsUnsupportedFormat, "" );

                buf_size = buf_len*2*sizeof(float) + ssize.width*2*sizeof(CvDecimateAlpha);
                if( buf_size < CV_MAX_LOCAL_SIZE )
                    buf = (float*)cvStackAlloc(buf_size);
                else
                    CV_CALL( temp_buf = buf = (float*)cvAlloc(buf_size));
                sum = buf + buf_len;
                xofs = (CvDecimateAlpha*)(sum + buf_len);

                for( dx = 0, k = 0; dx < dsize.width; dx++ )
                {
                    float fsx1 = dx*scale_x, fsx2 = fsx1 + scale_x;
                    int sx1 = cvCeil(fsx1), sx2 = cvFloor(fsx2);