Compiles
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7299d6d96f
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2
Makefile
2
Makefile
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@ -79,7 +79,7 @@ COMPINCLUDE = $(edirs) $(eddirs) $(pindirs) $(bsdirs)
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WARNING_FLAGS = #-Wall -Wwrite-strings -Wunsupported -Wall -Wextra -Wwrite-strings -Wno-unused-parameter -Wno-unused-function -Wno-missing-braces -Wno-incompatible-function-pointer-types -Wno-gnu-statement-expression -Wno-complex-component-init -pedantic
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WARNING_FLAGS = -Wno #-Wall -Wwrite-strings -Wunsupported -Wall -Wextra -Wwrite-strings -Wno-unused-parameter -Wno-unused-function -Wno-missing-braces -Wno-incompatible-function-pointer-types -Wno-gnu-statement-expression -Wno-complex-component-init -pedantic
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@ -11,6 +11,7 @@
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#include <stdlib.h>
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#include "mix.h"
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#include "limits.h"
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#include "iir.h"
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struct mShader *vid_shader;
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@ -90,7 +91,7 @@ void ds_openvideo(struct datastream *ds, const char *video, const char *adriver)
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fir->in = astream_filter;
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*/
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first_free_bus(hpf);
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first_free_bus(astream_filter);
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plm_set_video_decode_callback(ds->plm, render_frame, ds);
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plm_set_audio_decode_callback(ds->plm, render_audio, ds);
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@ -5,19 +5,42 @@
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#include "math.h"
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#include "stdlib.h"
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#include "iir.h"
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#include "log.h"
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#include "vec.h"
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#define PI 3.14159265
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struct vec filters;
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struct dsp_filter make_dsp(void *data, void (*in)(void *data, short *out, int n)) {
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struct dsp_filter new;
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new.data = data;
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new.filter = in;
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if (filters.len == 0)
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}
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void dsp_run(struct dsp_filter filter, short *out, int n) {
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filter.dirty = 1; // Always on for testing
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if (!filter.dirty)
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return;
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for (int i = 0; i < filter.inputs; i++)
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dsp_run(filter.in[i], out, n);
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filter.filter(filter.data, out, n);
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}
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struct dsp_filter_addin(struct dsp_filter filter, struct dsp_filter in)
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{
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if (filter.inputs > 5) {
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YughError("Too many inputs in filter.", 0);
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}
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filter.in[filter.inputs++] = in;
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}
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void am_mod(struct dsp_ammod *mod, short *c, int n)
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{
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dsp_run(mod->ina, mod->abuf, n);
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@ -133,9 +156,8 @@ void dsp_filter(short *in, short *out, int samples, struct dsp_delay *d)
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void dsp_rectify(short *in, short *out, int n)
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{
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for (int i = 0; i < n; i++) {
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for (int i = 0; i < n; i++)
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out[i] = abs(in[i]);
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}
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}
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struct phasor phasor_make(unsigned int sr, float freq)
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@ -245,25 +267,27 @@ void gen_pinknoise(void *data, short *out, int n)
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*/
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}
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short iir_filter(struct dsp_iir *iir, short val)
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short iir_filter(struct dsp_iir *miir, short val)
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{
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struct dsp_iir iir = *miir;
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float a = 0.f;
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iir->dx[0] = (float)val/SHRT_MAX;
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for (int i = 0; i < iir->n; i++)
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a += iir->ccof[i] * iir->dx[i];
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iir.dx[0] = (float)val/SHRT_MAX;
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for (int i = 0; i < iir.n; i++)
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a += iir.ccof[i] * iir.dx[i];
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for (int i = iir->n-1; i > 0; i--)
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iir->dx[i] = iir->dx[i-1];
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for (int i = iir.n-1; i > 0; i--)
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iir.dx[i] = iir.dx[i-1];
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for (int i =0; i < iir->n; i++)
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a -= iir->dcof[i] * iir->dy[i];
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for (int i =0; i < iir.n; i++)
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a -= iir.dcof[i] * iir.dy[i];
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iir->dy[0] = a;
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iir.dy[0] = a;
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for (int i = iir->n-1; i > 0; i--)
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iir->dy[i] = iir->dy[i-1];
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for (int i = iir.n-1; i > 0; i--)
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iir.dy[i] = iir.dy[i-1];
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@ -283,46 +307,31 @@ void dsp_iir_fillbuf(struct dsp_iir *iir, short *out, int n)
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}
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}
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struct dsp_iir new_iir(int poles, float freq)
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{
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struct dsp_iir new;
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new.poles = poles;
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new.freq = freq;
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new.n = new.poles+1;
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new.ccof = malloc(new.n*sizeof(float));
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new.dcof = malloc(new.n*sizeof(float));
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new.dy = malloc(new.n*sizeof(float));
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new.dx = malloc(new.n*sizeof(float));
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return new;
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}
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struct dsp_filter lpf_make(int poles, float freq)
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{
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struct dsp_iir *new = malloc(sizeof(*new));
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*new = new_iir(poles, freq);
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(*new) = make_iir(3, 1);
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double fcf = new->freq*2/SAMPLERATE;
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double sf = sf_bwlp(poles, fcf);
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printf("Making LPF filter, fcf: %f, coeffs: %i, scale %1.15lf\n", fcf, new->n, sf);
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int *ccof = ccof_bwlp(new->poles);
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double *dcof = dcof_bwlp(new->poles, fcf);
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int *ccof = ccof_bwlp(new->n);
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new->dcof = dcof_bwlp(new->n, fcf);
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for (int i = 0; i < new->n; i++) {
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new->ccof[i] = ccof[i] * sf;
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new->dcof[i] = dcof[i];
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}
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for (int i = 0; i < new->n; i++)
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new->ccof[i] = (float)ccof[i] * sf;
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new->dcof[0] = 0.f;
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free(ccof);
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free(dcof);
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printf("LPF coefficients are:\n");
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for (int i = 0; i < new->n; i++) {
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printf("%f, %f\n", new->ccof[i], new->dcof[i]);
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YughInfo("%f, %f\n", new->ccof[i], new->dcof[i]);
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}
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struct dsp_filter lpf;
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@ -335,25 +344,22 @@ struct dsp_filter lpf_make(int poles, float freq)
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struct dsp_filter hpf_make(int poles, float freq)
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{
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struct dsp_iir *new = malloc(sizeof(*new));
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*new = new_iir(poles, freq);
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*new = make_iir(3, 1);
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double fcf = new->freq*2/SAMPLERATE;
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double sf = sf_bwhp(new->poles, fcf);
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double sf = sf_bwhp(new->n, fcf);
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int *ccof = ccof_bwhp(new->poles);
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double *dcof = dcof_bwhp(new->poles, fcf);
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int *ccof = ccof_bwhp(new->n);
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new->dcof = dcof_bwhp(new->n, fcf);
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for (int i = 0; i < new->n; i++) {
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for (int i = 0; i < new->n; i++)
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new->ccof[i] = ccof[i] * sf;
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new->dcof[i] = dcof[i];
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}
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for (int i = 0; i < new->n; i++) {
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printf("%f, %f\n", new->ccof[i], new->dcof[i]);
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}
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free(ccof);
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free(dcof);
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struct dsp_filter hpf;
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hpf.data = new;
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@ -14,19 +14,12 @@ void dsp_rectify(short *in, short *out, int n);
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struct dsp_filter {
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void (*filter)(void *data, short *out, int samples);
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void *data;
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};
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struct dsp_iir {
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float freq;
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int poles;
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int n; // Amount of constants
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int order; // How many times it's applied
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float *ccof;
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float *dcof;
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float *dx;
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float *dy;
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int inputs;
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struct dsp_filter *in[6];
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struct dsp_filter in;
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short cache[CHANNELS*SAMPLERATE];
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int dirty;
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};
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struct dsp_fir {
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@ -39,6 +32,8 @@ struct dsp_fir {
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struct dsp_filter in;
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};
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void dsp_filter_addin(struct dsp_filter filter, struct dsp_filter in);
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struct dsp_filter lp_fir_make(float freq);
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void dsp_iir_fillbuf(struct dsp_iir *iir, short *out, int n);
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@ -43,6 +43,35 @@
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#include "limits.h"
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#include "iir.h"
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#include "dsp.h"
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#include "log.h"
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struct dsp_iir make_iir(int cofs, int order)
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{
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struct dsp_iir new;
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new.dcof = calloc(sizeof(float), cofs * order);
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new.ccof = calloc(sizeof(float), cofs * order);
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new.dx = calloc(sizeof(float), cofs * order);
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new.dy = calloc(sizeof(float), cofs * order);
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new.order = order;
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new.n = cofs;
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return new;
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}
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struct dsp_iir biquad_iir()
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{
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struct dsp_iir new = make_iir(3, 1);
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return new;
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}
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struct dsp_iir p2_iir_order(int order)
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{
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struct dsp_iir new = make_iir(3, order);
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new.order = order;
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return new;
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}
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/**********************************************************************
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binomial_mult - multiplies a series of binomials together and returns
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@ -641,26 +670,105 @@ float *fir_bpf(int n, double fcf1, double fcf2)
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struct dsp_iir sp_lp(double fcf)
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{
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struct dsp_iir new = make_iir(2, 1);
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double x = exp(-2*M_PI*fcf);
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new.ccof[0] = 1 - x;
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new.ccof[1] = 0.f;
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new.dcof[0] = 0.f;
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new.dcof[1] = x;
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return new;
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}
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struct dsp_iir sp_hp(double fcf)
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{
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struct dsp_iir new = make_iir(2, 1);
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double x = exp(-2*M_PI*fcf);
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new.ccof[0] = (1 + x)/2;
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new.ccof[1] = -new.ccof[0];
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new.dcof[0] = 0.f;
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new.dcof[1] = x;
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return new;
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}
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/* http://www.dspguide.com/ch19/3.htm */
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struct dsp_iir sp_bp(double fcf, double bw)
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{
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double R = 1 - 3*bw;
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double K = (1 - 2*R*cos(2*M_PI*fcf)+pow(R, 2)) / (2 - 2*cos(2*M_PI*fcf));
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struct dsp_iir new = make_iir(3, 1);
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new.ccof[0] = 1-K;
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new.ccof[1] = 2*(K-R)*cos(2*M_PI*fcf);
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new.ccof[2] = pow(R, 2) - K;
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new.dcof[0] = 0.f;
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new.dcof[1] = 2*R*cos(2*M_PI*fcf);
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new.dcof[2] = -1 * pow(R, 2);
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return new;
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}
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struct dsp_iir sp_notch(double fcf, double bw)
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{
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double R = 1 - 3*bw;
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double K = (1 - 2*R*cos(2*M_PI*fcf)+pow(R, 2)) / (2 - 2*cos(2*M_PI*fcf));
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struct dsp_iir new = make_iir(3, 1);
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new.ccof[0] = K;
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new.ccof[1] = -2*K*cos(2*M_PI*fcf);
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new.ccof[2] = K;
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new.dcof[0] = 0.f;
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new.dcof[1] = 2*R*cos(2*M_PI*fcf);
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new.dcof[2] = -1 * pow(R, 2);
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return new;
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}
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double chevy_pct_to_e(double pct)
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{
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if (pct > 0.292 || pct < 0) {
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YughWarn("Gave a percentage out of range. Should be between 0.0 and 0.292 to get a proper value. Gave %f.", pct);
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pct = pct > 0.292 ? 0.292 : 0.f;
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}
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double e = pow(1/(1-pct), 2) - 1;
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return e;
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}
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/* Four stage single pole low pass, similar to gauss */
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/* http://www.dspguide.com/ch19/2.htm */
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struct dsp_iir sp_lp_gauss(double fcf)
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{
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struct dsp_iir new = make_iir(5, 1);
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double x = exp(-14.445*fcf);
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new.ccof[0] = pow((1 - x), 4);
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new.dcof[0] = 0.f;
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new.dcof[1] = 4*x;
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new.dcof[2] = -6 * pow(x, 2);
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new.dcof[3] = 4 * pow(x, 3);
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new.dcof[4] = -1 * pow(x,4);
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return new;
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}
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/* Biquad filters */
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struct dsp_iir biquad_iir()
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{
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struct dsp_iir new;
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new.dcof = malloc(sizeof(float) * 3);
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new.ccof = malloc(sizeof(float) * 3);
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new.dx = malloc(sizeof(float) * 3);
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new.dy = malloc(sizeof(float) * 3);
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new.n = 3;
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new.poles = 2;
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return new;
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}
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void biquad_iir_fill(struct dsp_iir bq, double *a, double *b)
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{
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bq.ccof[0] = (b[0] / a[0]);
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@ -843,7 +951,7 @@ void p2_ccalc(double fcf, double p, double g, double *a, double *b)
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double w0 = tan(M_PI * fcf);
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double k[2];
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k[0] = p * w0;
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k[1] = g * pow2(w0);
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k[1] = g * pow(w0, 2);
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a[0] = k[1] / (1 + k[0] + k[1]);
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a[1] = 2 * a[0];
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@ -913,19 +1021,7 @@ struct dsp_iir p2_beshp(double fcf)
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return new;
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}
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struct dsp_iir p2_iir_order(int order)
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{
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struct dsp_iir new;
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new.n = 3;
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new.order = order;
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new.ccof = calloc(sizeof(float), 3 * order);
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new.dcof = calloc(sizeof(float), 3 * order);
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new.dx = calloc(sizeof(float), 3 * order);
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new.dy = calloc(sizeof(float), 3 * order);
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return new;
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}
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short p2_filter(struct dsp_iir iir, short val)
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{
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@ -963,8 +1059,8 @@ struct dsp_iir che_lp(int order, double fcf, double e)
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double a = tan(M_PI * fcf);
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double a2 = pow2(a);
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double u = log((1.f + sqrt(1.f + pow2(e)))/e);
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double a2 = pow(a, 2);
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double u = log((1.f + sqrt(1.f + pow(e, 2)))/e);
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double su = sinh(u/new.order);
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double cu = cosh(u/new.order);
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double b, c, s;
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@ -974,7 +1070,7 @@ struct dsp_iir che_lp(int order, double fcf, double e)
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{
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b = sin(M_PI * (2.f*i + 1.f)/(2.f*new.order)) * su;
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c = cos(M_PI * (2.f*i + 1.f)/(2.f*new.order)) * cu;
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c = pow2(b) + pow2(c);
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c = pow(b, 2) + pow(c, 2);
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s = a2*c + 2.f*a*b + 1.f;
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double A = a2/(4.f);
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@ -995,8 +1091,8 @@ struct dsp_iir che_hp(int order, double fcf, double e)
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struct dsp_iir new = che_lp(order, fcf, e);
|
||||
|
||||
double a = tan(M_PI * fcf);
|
||||
double a2 = pow2(a);
|
||||
double u = log((1.f + sqrt(1.f + pow2(e)))/e);
|
||||
double a2 = pow(a, 2);
|
||||
double u = log((1.f + sqrt(1.f + pow(e, 2)))/e);
|
||||
double su = sinh(u/new.order);
|
||||
double cu = cosh(u/new.order);
|
||||
double b, c, s;
|
||||
|
|
@ -1006,7 +1102,7 @@ struct dsp_iir che_hp(int order, double fcf, double e)
|
|||
{
|
||||
b = sin(M_PI * (2.f*i + 1.f)/(2.f*new.order)) * su;
|
||||
c = cos(M_PI * (2.f*i + 1.f)/(2.f*new.order)) * cu;
|
||||
c = pow2(b) + pow2(c);
|
||||
c = pow(b, 2) + pow(c, 2);
|
||||
s = a2*c + 2.f*a*b + 1.f;
|
||||
double A = 1.f/(4.f);
|
||||
|
||||
|
|
@ -1020,31 +1116,32 @@ struct dsp_iir che_hp(int order, double fcf, double e)
|
|||
return new;
|
||||
}
|
||||
|
||||
struct dsp_iir che_bp(int order, double fcf1, double fcf2, double e)
|
||||
struct dsp_iir che_bp(int order, double s, double fcf1, double fcf2, double e)
|
||||
{
|
||||
struct dsp_iir new = p2_iir_order(order);
|
||||
struct dsp_iir new = make_iir(5, order);
|
||||
|
||||
double a = cos(M_PI*(fcf1+fcf2)/2) / cos(M_PI*(fcf2-fcf1));
|
||||
double a2 = pow2(a);
|
||||
double b = tan(M_PI*(fcf2-fcf1));
|
||||
double b2 = pow2(b);
|
||||
double u = log((1.f+sqrt(1.f+pow2(e)))/e);
|
||||
double a = cos(M_PI*(fcf1+fcf2)/s) / cos(M_PI*(fcf2-fcf1)/s);
|
||||
double a2 = pow(a, 2);
|
||||
double b = tan(M_PI*(fcf2-fcf1)/s);
|
||||
double b2 = pow(b, 2);
|
||||
double u = log((1.f+sqrt(1.f+pow(e, 2)))/e);
|
||||
double su = sinh(2.f*u/new.order);
|
||||
double cu = cosh(2.f*u/new.order);
|
||||
double A = b2/(4.f);
|
||||
double r, c, s;
|
||||
double r, c;
|
||||
double ep = 2.f/e;
|
||||
|
||||
for (int i = 0; i < new.order; ++i) {
|
||||
r = sin(M_PI*(2.f*i+1.f)/new.order)*su;
|
||||
c = cos(M_PI*(2.f*i+1.f)/new.order)*su;
|
||||
c = pow2(r) + pow2(c);
|
||||
c = pow(r, 2) + pow(c, 2);
|
||||
s = b2*c + 2.f*b*r + 1.f;
|
||||
|
||||
new.ccof[0*i] = ep * 1.f/A;
|
||||
new.ccof[1*i] = ep * -2.f/A;
|
||||
new.ccof[2*i] = ep * 1.f/A;
|
||||
|
||||
new.ddof[0*i] = 0.f;
|
||||
new.dcof[0*i] = 0.f;
|
||||
new.dcof[1*i] = ep * 4.f*a*(1.f+b*r)/s;
|
||||
new.dcof[2*i] = ep * 2.f*(b2*c-2.f*a2-1.f)/s;
|
||||
new.dcof[3*i] = ep * 4.f*a*(1.f-b*r)/s;
|
||||
|
|
@ -1054,31 +1151,32 @@ struct dsp_iir che_bp(int order, double fcf1, double fcf2, double e)
|
|||
return new;
|
||||
}
|
||||
|
||||
struct dsp_iir che_notch(int order, double fcf1, double fcf2, double e)
|
||||
struct dsp_iir che_notch(int order, double s, double fcf1, double fcf2, double e)
|
||||
{
|
||||
struct dsp_iir new = p2_iir_order(order);
|
||||
struct dsp_iir new = make_iir(5, order);
|
||||
|
||||
double a = cos(M_PI*(fcf1+fcf2)/2) / cos(M_PI*(fcf2-fcf1));
|
||||
double a2 = pow2(a);
|
||||
double b = tan(M_PI*(fcf2-fcf1));
|
||||
double b2 = pow2(b);
|
||||
double u = log((1.f+sqrt(1.f+pow2(e)))/e);
|
||||
double su = sinh(2.f*u/n);
|
||||
double cu = cosh(2.f*u/n);
|
||||
double a = cos(M_PI*(fcf1+fcf2)/s) / cos(M_PI*(fcf2-fcf1)/s);
|
||||
double a2 = pow(a, 2);
|
||||
double b = tan(M_PI*(fcf2-fcf1)/s);
|
||||
double b2 = pow(b, 2);
|
||||
double u = log((1.f+sqrt(1.f+pow(e, 2)))/e);
|
||||
double su = sinh(2.f*u/new.n);
|
||||
double cu = cosh(2.f*u/new.n);
|
||||
double A = b2/(4.f*s);
|
||||
double r, c, s;
|
||||
double r, c;
|
||||
double ep = 2.f/e;
|
||||
|
||||
for (int i = 0; i < new.order; ++i) {
|
||||
r = sin(M_PI*(2.f*i+1.f)/new.order)*su;
|
||||
c = cos(M_PI*(2.f*i+1.f)/ew.order)*su;
|
||||
c = pow2(r) + pow2(c);
|
||||
c = cos(M_PI*(2.f*i+1.f)/new.order)*su;
|
||||
c = pow(r, 2) + pow(c, 2);
|
||||
s = b2*c + 2.f*b*r + 1.f;
|
||||
|
||||
new.ccof[0*i] = ep * 1.f/A;
|
||||
new.ccof[1*i] = ep * -2.f/A;
|
||||
new.ccof[2*i] = ep * 1.f/A;
|
||||
|
||||
new.ddof[0*i] = 0.f;
|
||||
new.dcof[0*i] = 0.f;
|
||||
new.dcof[1*i] = ep * 4.f*a*(c+b*r)/s;
|
||||
new.dcof[2*i] = ep * 2.f*(b2-2.f*a2*c-c)/s;
|
||||
new.dcof[3*i] = ep * 4.f*a*(c-b*r)/s;
|
||||
|
|
|
|||
|
|
@ -1,6 +1,22 @@
|
|||
#ifndef IIR_H
|
||||
#define IIR_H
|
||||
|
||||
#include "dsp.h"
|
||||
|
||||
struct dsp_iir {
|
||||
float freq;
|
||||
int n; // Amount of constants
|
||||
int order; // How many times it's applied
|
||||
float *ccof;
|
||||
float *dcof;
|
||||
float *dx;
|
||||
float *dy;
|
||||
|
||||
struct dsp_filter in;
|
||||
};
|
||||
|
||||
struct dsp_iir make_iir(int cofs, int order);
|
||||
|
||||
double *binomial_mult( int n, double *p );
|
||||
double *trinomial_mult( int n, double *b, double *c );
|
||||
|
||||
|
|
@ -23,6 +39,11 @@ float *fir_lp(int n, double fcf);
|
|||
float *fir_hp(int n, double fcf);
|
||||
float *fir_bpf(int n, double fcf1, double fcf2);
|
||||
|
||||
struct dsp_iir sp_lp(double fcf);
|
||||
struct dsp_iir sp_hp(double fcf);
|
||||
|
||||
double chevy_pct_to_e(double pct);
|
||||
|
||||
struct dsp_iir bqlp_dcof(double fcf, float Q);
|
||||
struct dsp_iir bqhp_dcof(double fcf, float Q);
|
||||
struct dsp_iir bqbpq_dcof(double fcf, float Q);
|
||||
|
|
@ -42,7 +63,7 @@ struct dsp_iir p2_beshp(double fcf);
|
|||
|
||||
struct dsp_iir che_lp(int order, double fcf, double e);
|
||||
struct dsp_iir che_hp(int order, double fcf, double e);
|
||||
struct dsp_iir che_bp(int order, double fcf1, double fcf2, double e);
|
||||
struct dsp_iir che_notch(int order, double fcf1, double fcf2, double e);
|
||||
struct dsp_iir che_bp(int order, double s, double fcf1, double fcf2, double e);
|
||||
struct dsp_iir che_notch(int order, double s, double fcf1, double fcf2, double e);
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -16,6 +16,9 @@
|
|||
#define TSF_IMPLEMENTATION
|
||||
#include "tsf.h"
|
||||
|
||||
#define TML_IMPLEMENTATION
|
||||
#include "tml.h"
|
||||
|
||||
|
||||
#define DR_WAV_IMPLEMENTATION
|
||||
#include "dr_wav.h"
|
||||
|
|
@ -222,6 +225,9 @@ void sound_init()
|
|||
|
||||
|
||||
|
||||
|
||||
tsf *tsf_load_filename("sounds/ff7.sf2");
|
||||
tml_message *tml_load_filename("sounds/one_winged_angel.mid");
|
||||
}
|
||||
|
||||
void audio_open(const char *device)
|
||||
|
|
|
|||
Loading…
Reference in a new issue