kopia lustrzana https://github.com/Dsplib/libdspl-2.0
47 wiersze
1.4 KiB
C
47 wiersze
1.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "dspl.h"
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#define N 18
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int main()
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{
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void* handle; /* DSPL handle */
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handle = dspl_load(); /* Load libdspl */
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complex_t x[N]; /* Input signal array */
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complex_t y[N]; /* FFT Output signal array */
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complex_t z[N]; /* IFFT Output signal array */
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fft_t pfft = {0}; /* FFT object (fill zeros) */
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int k;
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/* Fill FFT structure */
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fft_create(&pfft, N);
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/* Fill input signal x[k] = exp(j*k) */
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for(k = 0; k < N; k++)
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{
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RE(x[k]) = (double)cos((double)k);
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IM(x[k]) = (double)sin((double)k);
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}
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/* FFT */
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fft_cmplx(x, N, &pfft, y);
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/* FFT */
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ifft_cmplx(y, N, &pfft, z);
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/* print result */
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for(k = 0; k < N; k++)
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{
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printf("| x[%2d] = %9.3f%9.3f ", k, RE(x[k]), IM(x[k]));
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printf("| y[%2d] = %9.3f%9.3f ", k, RE(y[k]), IM(y[k]));
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printf("| z[%2d] = %9.3f%9.3f |\n", k, RE(z[k]), IM(z[k]));
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}
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fft_free(&pfft); /* Clear fft_t object */
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dspl_free(handle); /* Clear DSPL handle */
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return 0;
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}
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