7 int main(int argc, char **argv)
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11 double *x_real, *x_imag;
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14 printf("ffttool <wave file name>\n");
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18 /* WAVE
\83t
\83@
\83C
\83\8b\82©
\82ç
\83\82\83m
\83\89\83\8b\82Ì
\89¹
\83f
\81[
\83^
\82ð
\93ü
\97Í
\82·
\82é */
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19 mono_wave_read(&pcm0, argv[1]);
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22 x_real = calloc(N, sizeof(double));
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23 x_imag = calloc(N, sizeof(double));
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25 for (n = 0; n < N; n++)
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27 /* x(n)
\82Ì
\8eÀ
\90\94\95\94 */
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28 x_real[n] = pcm0.s[n];
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29 /* x(n)
\82Ì
\8b\95\90\94\95\94 */
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33 /* FFT
\82Ì
\8cv
\8eZ
\8c\8b\89Ê
\82Íx_real
\82Æx_imag
\82É
\8fã
\8f\91\82«
\82³
\82ê
\82é */
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34 FFT(x_real, x_imag, N);
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36 /*
\8eü
\94g
\90\94\93Á
\90« */
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37 for (k = 0; k < N; k++) {
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38 printf("%d %f+j%f\n", k, x_real[k], x_imag[k]);
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