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, 184 insertions, 0 deletions

diff --git a/apps/plugins/pdbox/PDa/intern/hip~.c b/apps/plugins/pdbox/PDa/intern/hip~.c
new file mode 100644
index 0000000000..a2a8c40cf2
--- /dev/null
+++ b/apps/plugins/pdbox/PDa/intern/hip~.c
@@ -0,0 +1,184 @@
+#include <m_pd.h>
+#include <m_fixed.h>
+
+typedef struct hipctl
+{
+    t_sample c_x;
+    t_sample c_coef;
+} t_hipctl;
+
+typedef struct sighip
+{
+    t_object x_obj;
+    float x_sr;
+    float x_hz;
+    t_hipctl x_cspace;
+    t_hipctl *x_ctl;
+    float x_f;
+} t_sighip;
+
+t_class *sighip_class;
+static void sighip_ft1(t_sighip *x, t_floatarg f);
+
+static void *sighip_new(t_floatarg f)
+{
+    t_sighip *x = (t_sighip *)pd_new(sighip_class);
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft1"));
+    outlet_new(&x->x_obj, gensym("signal"));
+    x->x_sr = 44100;
+    x->x_ctl = &x->x_cspace;
+    x->x_cspace.c_x = 0;
+    sighip_ft1(x, f);
+    x->x_f = 0;
+    return (x);
+}
+
+static void sighip_ft1(t_sighip *x, t_floatarg f)
+{
+    t_float coeff;
+    if (f < 0.001) f = 10;
+    x->x_hz = f;
+    coeff = 1 - f * (2 * 3.14159) / x->x_sr;
+    if (coeff < 0) coeff = 0;
+    x->x_ctl->c_coef = ftofix(coeff);
+}
+
+static t_int *sighip_perform(t_int *w)
+{
+    t_sample *in = (t_sample *)(w[1]);
+    t_sample *out = (t_sample *)(w[2]);
+    t_hipctl *c = (t_hipctl *)(w[3]);
+    int n = (t_int)(w[4]);
+    int i;
+    t_sample last = c->c_x;
+    t_sample coef = c->c_coef;
+    for (i = 0; i < n; i++)
+    {
+        t_sample new = *in++ + mult(coef,last);
+        *out++ = new - last;
+        last = new;
+    }
+    if (PD_BADFLOAT(last))
+        last = 0; 
+    c->c_x = last;
+    return (w+5);
+}
+
+static void sighip_dsp(t_sighip *x, t_signal **sp)
+{
+    x->x_sr = sp[0]->s_sr;
+    sighip_ft1(x,  x->x_hz);
+    dsp_add(sighip_perform, 4,
+        sp[0]->s_vec, sp[1]->s_vec, 
+            x->x_ctl, sp[0]->s_n);
+
+}
+
+static void sighip_clear(t_sighip *x, t_floatarg q)
+{
+    x->x_cspace.c_x = 0;
+}
+
+void hip_tilde_setup(void)
+{
+    sighip_class = class_new(gensym("hip~"), (t_newmethod)sighip_new, 0,
+        sizeof(t_sighip), 0, A_DEFFLOAT, 0);
+    CLASS_MAINSIGNALIN(sighip_class, t_sighip, x_f);
+    class_addmethod(sighip_class, (t_method)sighip_dsp, gensym("dsp"), 0);
+    class_addmethod(sighip_class, (t_method)sighip_ft1,
+        gensym("ft1"), A_FLOAT, 0);
+    class_addmethod(sighip_class, (t_method)sighip_clear, gensym("clear"), 0);
+    class_sethelpsymbol(sighip_class, gensym("lop~-help.pd"));
+}
+#include <m_pd.h>
+#include <m_fixed.h>
+
+typedef struct hipctl
+{
+    t_sample c_x;
+    t_sample c_coef;
+} t_hipctl;
+
+typedef struct sighip
+{
+    t_object x_obj;
+    float x_sr;
+    float x_hz;
+    t_hipctl x_cspace;
+    t_hipctl *x_ctl;
+    float x_f;
+} t_sighip;
+
+t_class *sighip_class;
+static void sighip_ft1(t_sighip *x, t_floatarg f);
+
+static void *sighip_new(t_floatarg f)
+{
+    t_sighip *x = (t_sighip *)pd_new(sighip_class);
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft1"));
+    outlet_new(&x->x_obj, gensym("signal"));
+    x->x_sr = 44100;
+    x->x_ctl = &x->x_cspace;
+    x->x_cspace.c_x = 0;
+    sighip_ft1(x, f);
+    x->x_f = 0;
+    return (x);
+}
+
+static void sighip_ft1(t_sighip *x, t_floatarg f)
+{
+    t_float coeff;
+    if (f < 0.001) f = 10;
+    x->x_hz = f;
+    coeff = 1 - f * (2 * 3.14159) / x->x_sr;
+    if (coeff < 0) coeff = 0;
+    x->x_ctl->c_coef = ftofix(coeff);
+}
+
+static t_int *sighip_perform(t_int *w)
+{
+    t_sample *in = (t_sample *)(w[1]);
+    t_sample *out = (t_sample *)(w[2]);
+    t_hipctl *c = (t_hipctl *)(w[3]);
+    int n = (t_int)(w[4]);
+    int i;
+    t_sample last = c->c_x;
+    t_sample coef = c->c_coef;
+    for (i = 0; i < n; i++)
+    {
+        t_sample new = *in++ + mult(coef,last);
+        *out++ = new - last;
+        last = new;
+    }
+    if (PD_BADFLOAT(last))
+        last = 0; 
+    c->c_x = last;
+    return (w+5);
+}
+
+static void sighip_dsp(t_sighip *x, t_signal **sp)
+{
+    x->x_sr = sp[0]->s_sr;
+    sighip_ft1(x,  x->x_hz);
+    dsp_add(sighip_perform, 4,
+        sp[0]->s_vec, sp[1]->s_vec, 
+            x->x_ctl, sp[0]->s_n);
+
+}
+
+static void sighip_clear(t_sighip *x, t_floatarg q)
+{
+    x->x_cspace.c_x = 0;
+}
+
+void hip_tilde_setup(void)
+{
+    sighip_class = class_new(gensym("hip~"), (t_newmethod)sighip_new, 0,
+        sizeof(t_sighip), 0, A_DEFFLOAT, 0);
+    CLASS_MAINSIGNALIN(sighip_class, t_sighip, x_f);
+    class_addmethod(sighip_class, (t_method)sighip_dsp, gensym("dsp"), 0);
+    class_addmethod(sighip_class, (t_method)sighip_ft1,
+        gensym("ft1"), A_FLOAT, 0);
+    class_addmethod(sighip_class, (t_method)sighip_clear, gensym("clear"), 0);
+    class_sethelpsymbol(sighip_class, gensym("lop~-help.pd"));
+}