15 lines
408 B
C
15 lines
408 B
C
#ifndef _FILTER_H
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#define _FILTER_H
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typedef struct filter {
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int iter;
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double a0, a1, a2, b1, b2;
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double z1[64], z2[64];
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} filter_t;
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void filter_lowpass_init(filter_t *bq, double frequency, int samplerate, int iterations);
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void filter_highpass_init(filter_t *bq, double frequency, int samplerate, int iterations);
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void filter_process(filter_t *bq, sample_t *samples, int length);
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#endif /* _FILTER_H */
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