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46 lines
1.3 KiB
46 lines
1.3 KiB
#include <cstdio>
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#include <cmath>
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#define USE_LUTS
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#include "synth/dsp/filter.h"
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#include "synth/dsp/util.h"
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void dumpLUT(const char * filename, const char * identifier, float *lut, size_t size) {
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FILE * f = fopen(filename, "w");
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fprintf(f, "float %s[] = {\n", identifier);
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for(int i = 0; i < size; ++i) {
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if(i % 8 == 0) {
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fputs(" ", f);
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}
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fprintf(f, "%13.7f", lut[i]);
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if(i < size - 1) {
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fputs(", ", f);
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}
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if(i % 8 == 7) {
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putc('\n', f);
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}
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}
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fputs("};\n", f);
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fclose(f);
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}
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int main(int argc, char** argv) {
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float kLUT[K_LUT_SIZE];
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for(int i = 0; i < K_LUT_SIZE; ++i) {
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kLUT[i] = tan(M_PI_4 * 0.002 * exp(i / (K_LUT_SIZE - 1.0) * FILTER_K_BASE));
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}
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dumpLUT("src/synth/dsp/filterlut.cpp", "kLUT", kLUT, K_LUT_SIZE);
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float noteLUT[NOTE_LUT_SIZE];
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for(int i = 0; i < NOTE_LUT_SIZE; ++i) {
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noteLUT[i] = 440 * pow(2, (i - 69) / 12.0);
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}
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dumpLUT("src/synth/dsp/notelut.cpp", "noteLUT", noteLUT, NOTE_LUT_SIZE);
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float centLUT[CENT_LUT_SIZE];
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for(int i = 0; i < CENT_LUT_SIZE; ++i) {
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centLUT[i] = pow(2, (float) i / ((CENT_LUT_SIZE - 1) * 12.0));
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}
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dumpLUT("src/synth/dsp/centlut.cpp", "centLUT", centLUT, CENT_LUT_SIZE);
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} |