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26 lines
562 B
C
26 lines
562 B
C
#pragma once
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#include <math.h>
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#include "../lib/constants.h"
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typedef struct
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{
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float alpha;
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float prev_sample;
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float gain;
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} ResistorCapacitor;
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void init_preemphasis(ResistorCapacitor *filter, float tau, float sample_rate, float ref_freq);
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float apply_preemphasis(ResistorCapacitor *filter, float sample);
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typedef struct {
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float b0, b1;
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float a1;
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float x_prev;
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float y_prev;
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} TiltCorrectionFilter;
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void tilt_init(TiltCorrectionFilter* filter, float cutoff_freq, float sample_rate);
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float tilt(TiltCorrectionFilter *filter, float input);
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