124 lines
2.6 KiB
C
124 lines
2.6 KiB
C
#include <stdio.h>
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#include <string.h>
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#include "crap_util.h"
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#include "param.h"
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#define BANDS 4
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#define ID 0x000CAFED
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#define LABEL "crap_eq"
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#define NAME "crap Parametric Equalizer"
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#define AUTHOR "Connor Olding"
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#define COPYRIGHT "MIT"
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#define PARAMETERS (BANDS*3)
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typedef struct {
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biquad filters[2][BANDS];
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float fs;
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} personal;
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static double
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process_one(biquad *filters, double samp)
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{
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for (int i = 0; i < BANDS; i++)
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samp = biquad_run(&filters[i], samp);
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return samp;
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}
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static void
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process(personal *data,
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float *in_L, float *in_R,
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float *out_L, float *out_R,
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unsigned long count)
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{
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for (unsigned long pos = 0; pos < count; pos++) {
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out_L[pos] = process_one(data->filters[0], in_L[pos]);
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out_R[pos] = process_one(data->filters[1], in_R[pos]);
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}
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}
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static void
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process_double(personal *data,
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double *in_L, double *in_R,
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double *out_L, double *out_R,
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unsigned long count)
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{
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for (unsigned long pos = 0; pos < count; pos++) {
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out_L[pos] = process_one(data->filters[0], in_L[pos]);
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out_R[pos] = process_one(data->filters[1], in_R[pos]);
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}
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}
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static void
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resume(personal *data)
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{
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biquad *filters = data->filters[0];
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for (int i = 0; i < BANDS; i++)
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biquad_init(&filters[i]);
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memcpy(data->filters[1], filters, BANDS*sizeof(biquad));
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}
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static void
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pause(personal *data)
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{}
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static void
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construct_params(param *params)
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{
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for (int i = 0; i < BANDS; i++) {
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sprintf(params[0].name, "Band %i Frequency", i + 1);
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params[0].min = 20;
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params[0].max = 20000;
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params[0].scale = SCALE_HZ;
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params[0].def = DEFAULT_440;
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param_reset(¶ms[0]);
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sprintf(params[1].name, "Band %i Gain", i + 1);
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params[1].min = -18;
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params[1].max = 18;
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params[1].scale = SCALE_DB;
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params[1].def = DEFAULT_0;
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param_reset(¶ms[1]);
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sprintf(params[2].name, "Band %i Bandwidth", i + 1);
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params[2].min = 0.0625; // 2^-4 could probably be 2^-3
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params[2].max = 8; // 2^3 could probably be 2^2
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params[2].scale = SCALE_FLOAT;
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params[2].def = DEFAULT_1;
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param_reset(¶ms[2]);
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params += 3;
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}
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}
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static void
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construct(personal *data)
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{}
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static void
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destruct(personal *data)
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{}
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static void
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adjust(personal *data, param *params, unsigned long fs)
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{
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data->fs = fs;
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biquad *filters = data->filters[0];
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for (int i = 0; i < BANDS; i++) {
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filters[i] = biquad_gen(FILT_PEAKING,
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params[0].value, params[1].value, params[2].value, fs);
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params += 3;
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}
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resume(data);
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}
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static void
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adjust_one(personal *data, param *params, unsigned int index)
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{
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float fs = data->fs;
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params += index/3*3;
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data->filters[0][index/3] = biquad_gen(FILT_PEAKING,
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params[0].value, params[1].value, params[2].value, fs);
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resume(data);
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}
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