ex_dsqbilininterp.c

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*/

#include "examples_doc_sq.h"
#include "dsp.h"

#define MSIZE 2
#define FRACTIONAL_PART 0x000FFFFF /* Q20 fractional part of 12.20 format */

int main(void)
{
    ippsq_bilinear_interp_instance_q15 S;
    float32_t x32f = 0.5f;
    float32_t y32f = 0.5f;
    q15_t     zData[MSIZE * MSIZE] = { 10000, 20000,
                                       20000, 30000 };
    q15_t     z;
    q31_t     x, y;
    uint16_t  i;

    ippsq_mat_init_q15(&S, MSIZE, MSIZE, zData);

    QM_PRINTF("zData =\n");
    for( i = 0; i < S.numRows; i++ ) {
        printf_v16s("", " %d", S.pData + i * S.numCols, S.numCols);
    }

    printf_v32f("float x =", &x32f, 1);
    printf_v32f("float y =", &y32f, 1);

    x = (q31_t)(x32f * FRACTIONAL_PART);
    y = (q31_t)(y32f * FRACTIONAL_PART);
    QM_PRINTF("x in 12.20 format = 0x%x, y in 12.20 format = 0x%x\n", x, y);

    z = ippsq_bilinear_interp_q15(&S, x, y);

    QM_PRINTF("z = %d\n", z);

    CONTROL_RETURN;
}
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