Add FS #10214. Initial commit of the original PDa code for the GSoC Pure Data plugin project of Wincent Balin. Stripped some non-sourcefiles and added a rockbox readme that needs a bit more info from Wincent. Is added to CATEGORIES and viewers, but not yet to SUBDIRS (ie doesn't build yet)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21044 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 238 insertions, 0 deletions

diff --git a/apps/plugins/pdbox/PDa/intern/vcf~.c b/apps/plugins/pdbox/PDa/intern/vcf~.c
new file mode 100644
index 0000000000..1ff09812a1
--- /dev/null
+++ b/apps/plugins/pdbox/PDa/intern/vcf~.c
@@ -0,0 +1,238 @@
+#include <m_pd.h>
+#include <m_fixed.h>
+#include "cos_table.h"
+
+/* ---------------- vcf~ - 2-pole bandpass filter. ----------------- */
+/* GG: complex resonator with signal frequency control 
+   this time using the bigger cos_table without interpolation 
+   really have to switch to a separate fixpoint format sometime 
+*/
+
+typedef struct vcfctl
+{
+    t_sample c_re;
+    t_sample c_im;
+    t_sample c_q;
+    t_sample c_isr;
+} t_vcfctl;
+
+typedef struct sigvcf
+{
+    t_object x_obj;
+    t_vcfctl x_cspace;
+    t_vcfctl *x_ctl;
+    float x_f;
+} t_sigvcf;
+
+t_class *sigvcf_class;
+
+static void *sigvcf_new(t_floatarg q)
+{
+    t_sigvcf *x = (t_sigvcf *)pd_new(sigvcf_class);
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft1"));
+    outlet_new(&x->x_obj, gensym("signal"));
+    outlet_new(&x->x_obj, gensym("signal"));
+    x->x_ctl = &x->x_cspace;
+    x->x_cspace.c_re = 0;
+    x->x_cspace.c_im = 0;
+    x->x_cspace.c_q = ftofix(q);
+    x->x_cspace.c_isr = 0;
+    x->x_f = 0;
+    return (x);
+}
+
+static void sigvcf_ft1(t_sigvcf *x, t_floatarg f)
+{
+    x->x_ctl->c_q = (f > 0 ? ftofix(f) : 0);
+}
+
+static t_int *sigvcf_perform(t_int *w)
+{
+    t_sample *in1 = (t_sample *)(w[1]);
+    t_sample *in2 = (t_sample *)(w[2]);
+    t_sample *out1 = (t_sample *)(w[3]);
+    t_sample *out2 = (t_sample *)(w[4]);
+    t_vcfctl *c = (t_vcfctl *)(w[5]);
+    int n = (t_int)(w[6]);
+    int i;
+    t_sample re = c->c_re, re2;
+    t_sample im = c->c_im;
+    t_sample q = c->c_q;
+    t_sample qinv = (q > 0 ? idiv(ftofix(1.0),q) : 0);
+    t_sample ampcorrect = ftofix(2.0f) - idiv(ftofix(2.0f) , (q + ftofix(2.0f)));
+    t_sample isr = c->c_isr;
+    t_sample coefr, coefi;
+    t_sample *tab = cos_table;
+        t_sample oneminusr,cfindx,cf,r;
+
+    for (i = 0; i < n; i++)
+    {
+        cf = mult(*in2++,isr);
+        if (cf < 0) cf = 0;
+        cfindx = mult(cf,ftofix(0.15915494))>>(fix1-ILOGCOSTABSIZE); /* 1/2*PI */
+        r = (qinv > 0 ? ftofix(1.01) - mult(cf,qinv) : 0);
+      
+        if (r < 0) r = 0;
+        oneminusr = ftofix(1.02f) - r; /* hand adapted */
+
+        /* r*cos(cf) */
+        coefr = mult(r,tab[cfindx]);
+
+        /* r*sin(cf) */
+        cfindx-=(ICOSTABSIZE>>2);
+        cfindx += cfindx < 0 ? ICOSTABSIZE:0;
+        coefi = mult(r,tab[cfindx]);
+
+        re2 = re;
+        *out1++ = re = mult(ampcorrect,mult(oneminusr,*in1++)) 
+            + mult(coefr,re2) - mult(coefi, im);
+        *out2++ = im = mult(coefi,re2) + mult(coefr,im);
+    }
+    c->c_re = re;
+    c->c_im = im;
+    return (w+7);
+}
+
+static void sigvcf_dsp(t_sigvcf *x, t_signal **sp)
+{
+    /* TODO sr is hardcoded */
+    x->x_ctl->c_isr = ftofix(0.0001424758);
+// idiv(ftofix(6.28318),ftofix(sp[0]->s_sr));
+    post("%f",fixtof(x->x_ctl->c_isr));
+   dsp_add(sigvcf_perform, 6,
+        sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec, 
+            x->x_ctl, sp[0]->s_n);
+
+}
+
+void vcf_tilde_setup(void)
+{
+    sigvcf_class = class_new(gensym("vcf~"), (t_newmethod)sigvcf_new, 0,
+        sizeof(t_sigvcf), 0, A_DEFFLOAT, 0);
+    CLASS_MAINSIGNALIN(sigvcf_class, t_sigvcf, x_f);
+    class_addmethod(sigvcf_class, (t_method)sigvcf_dsp, gensym("dsp"), 0);
+    class_addmethod(sigvcf_class, (t_method)sigvcf_ft1,
+        gensym("ft1"), A_FLOAT, 0);
+    class_sethelpsymbol(sigvcf_class, gensym("lop~-help.pd"));
+}
+
+#include <m_pd.h>
+#include <m_fixed.h>
+#include "cos_table.h"
+
+/* ---------------- vcf~ - 2-pole bandpass filter. ----------------- */
+/* GG: complex resonator with signal frequency control 
+   this time using the bigger cos_table without interpolation 
+   really have to switch to a separate fixpoint format sometime 
+*/
+
+typedef struct vcfctl
+{
+    t_sample c_re;
+    t_sample c_im;
+    t_sample c_q;
+    t_sample c_isr;
+} t_vcfctl;
+
+typedef struct sigvcf
+{
+    t_object x_obj;
+    t_vcfctl x_cspace;
+    t_vcfctl *x_ctl;
+    float x_f;
+} t_sigvcf;
+
+t_class *sigvcf_class;
+
+static void *sigvcf_new(t_floatarg q)
+{
+    t_sigvcf *x = (t_sigvcf *)pd_new(sigvcf_class);
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft1"));
+    outlet_new(&x->x_obj, gensym("signal"));
+    outlet_new(&x->x_obj, gensym("signal"));
+    x->x_ctl = &x->x_cspace;
+    x->x_cspace.c_re = 0;
+    x->x_cspace.c_im = 0;
+    x->x_cspace.c_q = ftofix(q);
+    x->x_cspace.c_isr = 0;
+    x->x_f = 0;
+    return (x);
+}
+
+static void sigvcf_ft1(t_sigvcf *x, t_floatarg f)
+{
+    x->x_ctl->c_q = (f > 0 ? ftofix(f) : 0);
+}
+
+static t_int *sigvcf_perform(t_int *w)
+{
+    t_sample *in1 = (t_sample *)(w[1]);
+    t_sample *in2 = (t_sample *)(w[2]);
+    t_sample *out1 = (t_sample *)(w[3]);
+    t_sample *out2 = (t_sample *)(w[4]);
+    t_vcfctl *c = (t_vcfctl *)(w[5]);
+    int n = (t_int)(w[6]);
+    int i;
+    t_sample re = c->c_re, re2;
+    t_sample im = c->c_im;
+    t_sample q = c->c_q;
+    t_sample qinv = (q > 0 ? idiv(ftofix(1.0),q) : 0);
+    t_sample ampcorrect = ftofix(2.0f) - idiv(ftofix(2.0f) , (q + ftofix(2.0f)));
+    t_sample isr = c->c_isr;
+    t_sample coefr, coefi;
+    t_sample *tab = cos_table;
+        t_sample oneminusr,cfindx,cf,r;
+
+    for (i = 0; i < n; i++)
+    {
+        cf = mult(*in2++,isr);
+        if (cf < 0) cf = 0;
+        cfindx = mult(cf,ftofix(0.15915494))>>(fix1-ILOGCOSTABSIZE); /* 1/2*PI */
+        r = (qinv > 0 ? ftofix(1.01) - mult(cf,qinv) : 0);
+      
+        if (r < 0) r = 0;
+        oneminusr = ftofix(1.02f) - r; /* hand adapted */
+
+        /* r*cos(cf) */
+        coefr = mult(r,tab[cfindx]);
+
+        /* r*sin(cf) */
+        cfindx-=(ICOSTABSIZE>>2);
+        cfindx += cfindx < 0 ? ICOSTABSIZE:0;
+        coefi = mult(r,tab[cfindx]);
+
+        re2 = re;
+        *out1++ = re = mult(ampcorrect,mult(oneminusr,*in1++)) 
+            + mult(coefr,re2) - mult(coefi, im);
+        *out2++ = im = mult(coefi,re2) + mult(coefr,im);
+    }
+    c->c_re = re;
+    c->c_im = im;
+    return (w+7);
+}
+
+static void sigvcf_dsp(t_sigvcf *x, t_signal **sp)
+{
+    /* TODO sr is hardcoded */
+    x->x_ctl->c_isr = ftofix(0.0001424758);
+// idiv(ftofix(6.28318),ftofix(sp[0]->s_sr));
+    post("%f",fixtof(x->x_ctl->c_isr));
+   dsp_add(sigvcf_perform, 6,
+        sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec, 
+            x->x_ctl, sp[0]->s_n);
+
+}
+
+void vcf_tilde_setup(void)
+{
+    sigvcf_class = class_new(gensym("vcf~"), (t_newmethod)sigvcf_new, 0,
+        sizeof(t_sigvcf), 0, A_DEFFLOAT, 0);
+    CLASS_MAINSIGNALIN(sigvcf_class, t_sigvcf, x_f);
+    class_addmethod(sigvcf_class, (t_method)sigvcf_dsp, gensym("dsp"), 0);
+    class_addmethod(sigvcf_class, (t_method)sigvcf_ft1,
+        gensym("ft1"), A_FLOAT, 0);
+    class_sethelpsymbol(sigvcf_class, gensym("lop~-help.pd"));
+}
+