28 lines
623 B
C
28 lines
623 B
C
#include <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include <errno.h>
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#include "crap_util.h"
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void
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usage() {
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fputs("usage: design SAMPLERATE TYPE CENTERFREQ GAIN BANDWIDTH\n", stderr);
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exit(1);
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}
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int
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main(int argc, char **argv) {
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if (argc != 6) usage();
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double tv[5];
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for (int i = 1; i <= 5; i++) {
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tv[i - 1]=strtold(argv[i], NULL);
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if (errno) {
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fprintf(stderr, "arg #%i failed to convert to double\n", i);
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exit(1);
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}
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}
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biquad bq = biquad_gen((int) tv[1], tv[2], tv[3], tv[4], tv[0]);
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printf("b0 %+.18f\nb1 %+.18f\nb2 %+.18f\na1 %+.18f\na2 %+.18f\n",bq.b0,bq.b1,bq.b2,bq.a1,bq.a2);
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return 0;
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}
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