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-rw-r--r--src/iemlib1/hml_shelf~.c548
1 files changed, 0 insertions, 548 deletions
diff --git a/src/iemlib1/hml_shelf~.c b/src/iemlib1/hml_shelf~.c
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--- a/src/iemlib1/hml_shelf~.c
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-/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
-* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
-
-iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2005 */
-
-#include "m_pd.h"
-#include "iemlib.h"
-#include <math.h>
-
-/* ---------- hml_shelf~ - high-middle-low-shelving filter ----------- */
-
-typedef struct _hml_shelf_tilde
-{
- t_object x_obj;
- t_float wn1;
- t_float wn2;
- t_float a0;
- t_float a1;
- t_float a2;
- t_float b1;
- t_float b2;
- t_float sr;
- t_float cur_lf;
- t_float cur_hf;
- t_float cur_lg;
- t_float cur_mg;
- t_float cur_hg;
- t_float delta_lf;
- t_float delta_hf;
- t_float delta_lg;
- t_float delta_mg;
- t_float delta_hg;
- t_float end_lf;
- t_float end_hf;
- t_float end_lg;
- t_float end_mg;
- t_float end_hg;
- t_float ticks_per_interpol_time;
- t_float rcp_ticks;
- t_float interpol_time;
- int ticks;
- int counter_lf;
- int counter_hf;
- int counter_lg;
- int counter_mg;
- int counter_hg;
- int event_mask;
- void *x_debug_outlet;
- t_atom x_at[5];
- t_float x_msi;
-} t_hml_shelf_tilde;
-
-t_class *hml_shelf_tilde_class;
-
-static void hml_shelf_tilde_calc(t_hml_shelf_tilde *x)
-{
- t_float rf = x->cur_hf/x->cur_lf;
- t_float mf = x->cur_hf*x->cur_lf;
- t_float lg = x->cur_lg;
- t_float rcplg = 1.0f/lg;
- t_float mg = x->cur_mg;
- t_float rcpmg = 1.0f/mg;
- t_float hg = x->cur_hg;
- t_float rcphg = 1.0f/hg;
- t_float f = mf*x->sr;
- t_float l = cos(f)/sin(f);
- t_float k1 = rf*l;
- t_float k2 = l/rf;
- t_float k3 = l*l;
- t_float k4 = k3*hg;
- t_float k5 = k3*rcphg;
- t_float k6 = rcplg + k5;
- t_float k7 = rcpmg*k1 + k2*rcplg*rcphg*mg;
- t_float k8 = lg + k4;
- t_float k9 = mg*k1 + k2*lg*hg*rcpmg;
- t_float k10 = 1.0f/(k6 + k7);
-
- x->b2 = k10*(k7 - k6);
- x->b1 = k10*2.0f*(k5 - rcplg);
- x->a2 = k10*(k8 - k9);
- x->a1 = k10*2.0f*(lg - k4);
- x->a0 = k10*(k8 + k9);
-}
-
-/*
-high- & low- shelving-filter:
-L....sqrt(lowlevel);
-rL...rsqrt(lowlevel);
-M....sqrt(mediumlevel);
-rM...rsqrt(mediumlevel);
-H....sqrt(highlevel);
-rH...rsqrt(highlevel);
-V....sqrt(highfrequency/lowfrequency);
-P....j*2*pi*f/(2*pi*V*lowfrequency);
-
-Y/X = [M/(1/M)] * [(L/M + PV)/(M/L + PV)] * [(1 + HP/(VM))/(1 + MP/(VH))];
-Y/X = (L + P*(M*V + L*H/(V*M)) + P*P*H) / (rL + P*(rM*V + rL*rH/(V*rM)) + P*P*rH);
-
-hlshlv: lowlevel: ll; mediumlevel: lm; highlevel: hl; lowfrequency: fl; highfrequency: fh; samplerate: sr;
-
-V = sqrt(fh/fl);
-f = fl*V;
-L = sqrt(ll);
-rL = 1.0/L;
-M = sqrt(lm);
-rM = 1.0/M;
-H = sqrt(lh);
-rH = 1.0/H;
-
-l = cot(f*3.14159265358979323846/sr);
-k1 = V*l;
-k2 = l/V;
-l2 = l*l;
-l3 = l2*H;
-l4 = l2*rH;
-m1 = k2*L*H*rM;
-m2 = k2*rL*rH*M;
-n1 = rL + l4;
-n2 = rM*k1 + m2;
-p1 = L + l3;
-p2 = M*k1 + m1;
-a012 = 1.0/(n1 + n2);
-
-b2 = a012*(n2 - n1);
-b1 = a012*2.0*(l4 - rL);
-a2 = a012*(p1 - p2);
-a1 = a012*2.0*(L - l3);
-a0 = a012*(p1 + p2);
-
-rf = sqrt(fh/fl);
-mf = fl*rf;
-L = sqrt(ll);
-rL = 1.0/L;
-M = sqrt(lm);
-rM = 1.0/M;
-H = sqrt(lh);
-rH = 1.0/H;
-
-l = cot(fm*3.14159265358979323846/sr);
-k1 = V*l;
-k2 = l/V;
-k3 = l*l;
-k4 = k3*H;
-k5 = k3*rH;
-k6 = rL + k5;
-k7 = rM*k1 + k2*rL*rH*M;
-k8 = L + k4;
-k9 = M*k1 + k2*L*H*rM;
-k10 = 1.0/(k6 + k7);
-
-b2 = k10*(k7 - k6);
-b1 = k10*2.0*(k5 - rL);
-a2 = k10*(k8 - k9);
-a1 = k10*2.0*(L - k4);
-a0 = k10*(k8 + k9);
-*/
-
-
-static void hml_shelf_tilde_dsp_tick(t_hml_shelf_tilde *x)
-{
- if(x->event_mask)
- {
- t_float discriminant;
-
- if(x->counter_lg)
- {
- if(x->counter_lg <= 1)
- {
- x->cur_lg = x->end_lg;
- x->counter_lg = 0;
- x->event_mask &= 30;/*set event_mask_bit 0 = 0*/
- }
- else
- {
- x->counter_lg--;
- x->cur_lg *= x->delta_lg;
- }
- }
- if(x->counter_lf)
- {
- if(x->counter_lf <= 1)
- {
- x->cur_lf = x->end_lf;
- x->counter_lf = 0;
- x->event_mask &= 29;/*set event_mask_bit 1 = 0*/
- }
- else
- {
- x->counter_lf--;
- x->cur_lf *= x->delta_lf;
- }
- }
- if(x->counter_mg)
- {
- if(x->counter_mg <= 1)
- {
- x->cur_mg = x->end_mg;
- x->counter_mg = 0;
- x->event_mask &= 27;/*set event_mask_bit 2 = 0*/
- }
- else
- {
- x->counter_mg--;
- x->cur_mg *= x->delta_mg;
- }
- }
- if(x->counter_hf)
- {
- if(x->counter_hf <= 1)
- {
- x->cur_hf = x->end_hf;
- x->counter_hf = 0;
- x->event_mask &= 23;/*set event_mask_bit 3 = 0*/
- }
- else
- {
- x->counter_hf--;
- x->cur_hf *= x->delta_hf;
- }
- }
- if(x->counter_hg)
- {
- if(x->counter_hg <= 1)
- {
- x->cur_hg = x->end_hg;
- x->counter_hg = 0;
- x->event_mask &= 15;/*set event_mask_bit 4 = 0*/
- }
- else
- {
- x->counter_hg--;
- x->cur_hg *= x->delta_hg;
- }
- }
- hml_shelf_tilde_calc(x);
-
- /* stability check */
-
- discriminant = x->b1 * x->b1 + 4.0f * x->b2;
- if(x->b1 <= -1.9999996f)
- x->b1 = -1.9999996f;
- else if(x->b1 >= 1.9999996f)
- x->b1 = 1.9999996f;
-
- if(x->b2 <= -0.9999998f)
- x->b2 = -0.9999998f;
- else if(x->b2 >= 0.9999998f)
- x->b2 = 0.9999998f;
-
- if(discriminant >= 0.0f)
- {
- if(0.9999998f - x->b1 - x->b2 < 0.0f)
- x->b2 = 0.9999998f - x->b1;
- if(0.9999998f + x->b1 - x->b2 < 0.0f)
- x->b2 = 0.9999998f + x->b1;
- }
- }
-}
-
-static t_int *hml_shelf_tilde_perform(t_int *w)
-{
- t_float *in = (t_float *)(w[1]);
- t_float *out = (t_float *)(w[2]);
- t_hml_shelf_tilde *x = (t_hml_shelf_tilde *)(w[3]);
- int i, n = (t_int)(w[4]);
- t_float wn0, wn1=x->wn1, wn2=x->wn2;
- t_float a0=x->a0, a1=x->a1, a2=x->a2;
- t_float b1=x->b1, b2=x->b2;
-
- hml_shelf_tilde_dsp_tick(x);
- for(i=0; i<n; i++)
- {
- wn0 = *in++ + b1*wn1 + b2*wn2;
- *out++ = a0*wn0 + a1*wn1 + a2*wn2;
- wn2 = wn1;
- wn1 = wn0;
- }
- /* NAN protect */
- if(IEM_DENORMAL(wn2))
- wn2 = 0.0f;
- if(IEM_DENORMAL(wn1))
- wn1 = 0.0f;
-
- x->wn1 = wn1;
- x->wn2 = wn2;
- return(w+5);
-}
-
-/* yn0 = *out;
-xn0 = *in;
-*************
-yn0 = a0*xn0 + a1*xn1 + a2*xn2 + b1*yn1 + b2*yn2;
-yn2 = yn1;
-yn1 = yn0;
-xn2 = xn1;
-xn1 = xn0;
-*************************
-y/x = (a0 + a1*z-1 + a2*z-2)/(1 - b1*z-1 - b2*z-2);
-*/
-
-static t_int *hml_shelf_tilde_perf8(t_int *w)
-{
- t_float *in = (t_float *)(w[1]);
- t_float *out = (t_float *)(w[2]);
- t_hml_shelf_tilde *x = (t_hml_shelf_tilde *)(w[3]);
- int i, n = (t_int)(w[4]);
- t_float wn[10];
- t_float a0=x->a0, a1=x->a1, a2=x->a2;
- t_float b1=x->b1, b2=x->b2;
-
- hml_shelf_tilde_dsp_tick(x);
- wn[0] = x->wn2;
- wn[1] = x->wn1;
- for(i=0; i<n; i+=8, in+=8, out+=8)
- {
- wn[2] = in[0] + b1*wn[1] + b2*wn[0];
- out[0] = a0*wn[2] + a1*wn[1] + a2*wn[0];
- wn[3] = in[1] + b1*wn[2] + b2*wn[1];
- out[1] = a0*wn[3] + a1*wn[2] + a2*wn[1];
- wn[4] = in[2] + b1*wn[3] + b2*wn[2];
- out[2] = a0*wn[4] + a1*wn[3] + a2*wn[2];
- wn[5] = in[3] + b1*wn[4] + b2*wn[3];
- out[3] = a0*wn[5] + a1*wn[4] + a2*wn[3];
- wn[6] = in[4] + b1*wn[5] + b2*wn[4];
- out[4] = a0*wn[6] + a1*wn[5] + a2*wn[4];
- wn[7] = in[5] + b1*wn[6] + b2*wn[5];
- out[5] = a0*wn[7] + a1*wn[6] + a2*wn[5];
- wn[8] = in[6] + b1*wn[7] + b2*wn[6];
- out[6] = a0*wn[8] + a1*wn[7] + a2*wn[6];
- wn[9] = in[7] + b1*wn[8] + b2*wn[7];
- out[7] = a0*wn[9] + a1*wn[8] + a2*wn[7];
- wn[0] = wn[8];
- wn[1] = wn[9];
- }
- /* NAN protect */
- if(IEM_DENORMAL(wn[0]))
- wn[0] = 0.0f;
- if(IEM_DENORMAL(wn[1]))
- wn[1] = 0.0f;
-
- x->wn1 = wn[1];
- x->wn2 = wn[0];
- return(w+5);
-}
-
-static void hml_shelf_tilde_ft6(t_hml_shelf_tilde *x, t_floatarg t)
-{
- int i = (int)((x->ticks_per_interpol_time)*t);
-
- x->interpol_time = t;
- if(i <= 0)
- i = 1;
- x->ticks = i;
- x->rcp_ticks = 1.0f / (t_float)i;
-}
-
-static void hml_shelf_tilde_ft5(t_hml_shelf_tilde *x, t_floatarg hl)
-{
- t_float hg = exp(0.057564627325 * hl);
-
- if(hg != x->cur_hg)
- {
- x->end_hg = hg;
- x->counter_hg = x->ticks;
- x->delta_hg = exp(log(hg/x->cur_hg)*x->rcp_ticks);
- x->event_mask |= 16;/*set event_mask_bit 4 = 1*/
- }
-}
-
-static void hml_shelf_tilde_ft4(t_hml_shelf_tilde *x, t_floatarg hf)
-{
- t_float sqhf;
-
- if(hf <= 0.0f)
- hf = 0.000001f;
- sqhf = sqrt(hf);
- if(sqhf != x->cur_hf)
- {
- x->end_hf = sqhf;
- x->counter_hf = x->ticks;
- x->delta_hf = exp(log(sqhf/x->cur_hf)*x->rcp_ticks);
- x->event_mask |= 8;/*set event_mask_bit 3 = 1*/
- }
-}
-
-static void hml_shelf_tilde_ft3(t_hml_shelf_tilde *x, t_floatarg ml)
-{
- t_float mg = exp(0.057564627325 * ml);
-
- if(mg != x->cur_mg)
- {
- x->end_mg = mg;
- x->counter_mg = x->ticks;
- x->delta_mg = exp(log(mg/x->cur_mg)*x->rcp_ticks);
- x->event_mask |= 4;/*set event_mask_bit 2 = 1*/
- }
-}
-
-static void hml_shelf_tilde_ft2(t_hml_shelf_tilde *x, t_floatarg lf)
-{
- t_float sqlf;
-
- if(lf <= 0.0f)
- lf = 0.000001f;
- sqlf = sqrt(lf);
- if(sqlf != x->cur_lf)
- {
- x->end_lf = sqlf;
- x->counter_lf = x->ticks;
- x->delta_lf = exp(log(sqlf/x->cur_lf)*x->rcp_ticks);
- x->event_mask |= 2;/*set event_mask_bit 1 = 1*/
- }
-}
-
-static void hml_shelf_tilde_ft1(t_hml_shelf_tilde *x, t_floatarg ll)
-{
- t_float lg = exp(0.057564627325 * ll);
-
- if(lg != x->cur_lg)
- {
- x->end_lg = lg;
- x->counter_lg = x->ticks;
- x->delta_lg = exp(log(lg/x->cur_lg)*x->rcp_ticks);
- x->event_mask |= 1;/*set event_mask_bit 0 = 1*/
- }
-}
-
-static void hml_shelf_tilde_print(t_hml_shelf_tilde *x)
-{
- // post("fb1 = %g, fb2 = %g, ff1 = %g, ff2 = %g, ff3 = %g", x->b1, x->b2, x->a0, x->a1, x->a2);
- x->x_at[0].a_w.w_float = x->b1;
- x->x_at[1].a_w.w_float = x->b2;
- x->x_at[2].a_w.w_float = x->a0;
- x->x_at[3].a_w.w_float = x->a1;
- x->x_at[4].a_w.w_float = x->a2;
- outlet_list(x->x_debug_outlet, &s_list, 5, x->x_at);
-}
-
-static void hml_shelf_tilde_dsp(t_hml_shelf_tilde *x, t_signal **sp)
-{
- int i, n=(int)sp[0]->s_n;
-
- x->sr = 3.14159265358979323846f / (t_float)(sp[0]->s_sr);
- x->ticks_per_interpol_time = 0.001f * (t_float)(sp[0]->s_sr) / (t_float)n;
- i = (int)((x->ticks_per_interpol_time)*(x->interpol_time));
- if(i <= 0)
- i = 1;
- x->ticks = i;
- x->rcp_ticks = 1.0f / (t_float)i;
- if(n&7)
- dsp_add(hml_shelf_tilde_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, n);
- else
- dsp_add(hml_shelf_tilde_perf8, 4, sp[0]->s_vec, sp[1]->s_vec, x, n);
-}
-
-static void *hml_shelf_tilde_new(t_symbol *s, int argc, t_atom *argv)
-{
- t_hml_shelf_tilde *x = (t_hml_shelf_tilde *)pd_new(hml_shelf_tilde_class);
- int i;
- t_float lf=200.0f, hf=2000.0f, ll=0.0f, ml=0.0f, hl=0.0f, interpol=0.0f;
-
- inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
- inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft2"));
- inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft3"));
- inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft4"));
- inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft5"));
- inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft6"));
- outlet_new(&x->x_obj, &s_signal);
- x->x_debug_outlet = outlet_new(&x->x_obj, &s_list);
- x->x_msi = 0;
-
- x->x_at[0].a_type = A_FLOAT;
- x->x_at[1].a_type = A_FLOAT;
- x->x_at[2].a_type = A_FLOAT;
- x->x_at[3].a_type = A_FLOAT;
- x->x_at[4].a_type = A_FLOAT;
-
- x->event_mask = 2;
- x->counter_lg = 0;
- x->counter_lf = 1;
- x->counter_mg = 0;
- x->counter_hf = 0;
- x->counter_hg = 0;
- x->delta_lg = 0.0f;
- x->delta_lf = 0.0f;
- x->delta_mg = 0.0f;
- x->delta_hf = 0.0f;
- x->delta_hg = 0.0f;
- x->interpol_time = 0.0f;
- x->wn1 = 0.0f;
- x->wn2 = 0.0f;
- x->a0 = 0.0f;
- x->a1 = 0.0f;
- x->a2 = 0.0f;
- x->b1 = 0.0f;
- x->b2 = 0.0f;
- x->sr = 3.14159265358979323846f / 44100.0f;
- if((argc == 6)&&IS_A_FLOAT(argv,5)&&IS_A_FLOAT(argv,4)&&IS_A_FLOAT(argv,3)
- &&IS_A_FLOAT(argv,2)&&IS_A_FLOAT(argv,1)&&IS_A_FLOAT(argv,0))
- {
- ll = (t_float)atom_getfloatarg(0, argc, argv);
- lf = (t_float)atom_getfloatarg(1, argc, argv);
- ml = (t_float)atom_getfloatarg(2, argc, argv);
- hf = (t_float)atom_getfloatarg(3, argc, argv);
- hl = (t_float)atom_getfloatarg(4, argc, argv);
- interpol = (t_float)atom_getfloatarg(5, argc, argv);
- }
- x->cur_lg = exp(0.057564627325 * ll);
- x->cur_mg = exp(0.057564627325 * ml);
- x->cur_hg = exp(0.057564627325 * hl);
- if(lf <= 0.0f)
- lf = 0.000001f;
- if(hf <= 0.0f)
- hf = 0.000001f;
- x->cur_lf = sqrt(lf);
- x->cur_hf = sqrt(hf);
- if(interpol < 0.0f)
- interpol = 0.0f;
- x->interpol_time = interpol;
- x->ticks_per_interpol_time = 0.5f;
- i = (int)((x->ticks_per_interpol_time)*(x->interpol_time));
- if(i <= 0)
- i = 1;
- x->ticks = i;
- x->rcp_ticks = 1.0f / (t_float)i;
- x->end_lf = x->cur_lf;
- x->end_hf = x->cur_hf;
- x->end_lg = x->cur_lg;
- x->end_mg = x->cur_mg;
- x->end_hg = x->cur_hg;
- return(x);
-}
-
-void hml_shelf_tilde_setup(void)
-{
- hml_shelf_tilde_class = class_new(gensym("hml_shelf~"), (t_newmethod)hml_shelf_tilde_new,
- 0, sizeof(t_hml_shelf_tilde), 0, A_GIMME, 0);
- CLASS_MAINSIGNALIN(hml_shelf_tilde_class, t_hml_shelf_tilde, x_msi);
- class_addmethod(hml_shelf_tilde_class, (t_method)hml_shelf_tilde_dsp, gensym("dsp"), 0);
- class_addmethod(hml_shelf_tilde_class, (t_method)hml_shelf_tilde_ft1, gensym("ft1"), A_FLOAT, 0);
- class_addmethod(hml_shelf_tilde_class, (t_method)hml_shelf_tilde_ft2, gensym("ft2"), A_FLOAT, 0);
- class_addmethod(hml_shelf_tilde_class, (t_method)hml_shelf_tilde_ft3, gensym("ft3"), A_FLOAT, 0);
- class_addmethod(hml_shelf_tilde_class, (t_method)hml_shelf_tilde_ft4, gensym("ft4"), A_FLOAT, 0);
- class_addmethod(hml_shelf_tilde_class, (t_method)hml_shelf_tilde_ft5, gensym("ft5"), A_FLOAT, 0);
- class_addmethod(hml_shelf_tilde_class, (t_method)hml_shelf_tilde_ft6, gensym("ft6"), A_FLOAT, 0);
- class_addmethod(hml_shelf_tilde_class, (t_method)hml_shelf_tilde_print, gensym("print"), 0);
- class_sethelpsymbol(hml_shelf_tilde_class, gensym("iemhelp/help-hml_shelf~"));
-}
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