ex_dsqcfft.c

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*/

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

#define VLENGTH 8

int main(void)
{
    ippsq_cfft_instance_q15 S;
    uint8_t buffer[sizeof(q15_t) * VLENGTH / 4];
    q15_t src[VLENGTH * 2] = { 16000, 0, 0, 16000, -16000, 0, 0, -16000, 16000, 0, 0, 16000, -16000, 0, 0, -16000 };

    ippsq_cfft_init_q15(&S, VLENGTH, buffer);
    printf_v16s("Before:\n src =\n", " %d", src, S.fftLen * 2);
    printf_v16s("buffer sin(0-PI/4] =\n", " %d", (q15_t*)buffer, S.fftLen / 4);
    QM_PRINTF("complex fft length = %d\n", S.fftLen);

    ippsq_cfft_q15(&S, src, 0, 1);

    printf_v16s("After:\n src =\n", " %d", src, S.fftLen * 2);

    CONTROL_RETURN;
}
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