22 lines
719 B
C
22 lines
719 B
C
#ifndef _FIR_FILTER_H
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#define _FIR_FILTER_H
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typedef struct fir_filter {
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int ntaps;
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int delay;
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double *taps;
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double *buffer;
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int buffer_pos;
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} fir_filter_t;
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fir_filter_t *fir_lowpass_init(double samplerate, double cutoff, double transition_bandwidth);
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fir_filter_t *fir_highpass_init(double samplerate, double cutoff, double transition_bandwidth);
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fir_filter_t *fir_allpass_init(double samplerate, double transition_bandwidth);
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fir_filter_t *fir_twopass_init(double samplerate, double cutoff_low, double cutoff_high, double transition_bandwidth);
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void fir_exit(fir_filter_t *fir);
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void fir_process(fir_filter_t *fir, sample_t *samples, int num);
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int fir_get_delay(fir_filter_t *fir);
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#endif /* _FIR_FILTER_H */
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