1 files changed, 107 insertions, 0 deletions
diff --git a/signal/mixer~.c b/signal/mixer~.c
new file mode 100755
index 0000000..5d90285
--- /dev/null
+++ b/signal/mixer~.c
@@ -0,0 +1,107 @@
+/* (C) Oswald Berthold  <opt@web.fm> */
+
+
+#include "math.h"
+#include <m_pd.h>
+
+/* ----------------------------- mixer ----------------------------- */
+static t_class *mixer_class;
+
+
+
+typedef struct _mixer
+{
+  t_object x_obj;
+  t_int x_n;
+  t_float* x_m;
+} t_mixer;
+
+static void *mixer_new(t_symbol *s, t_floatarg num)
+{
+  int i;
+  t_mixer *x = (t_mixer *)pd_new(mixer_class);
+  if (num < 1)  x->x_n = 1;
+  else x->x_n = (int) num;
+	
+  x->x_m = getbytes(sizeof(t_float)*x->x_n);
+
+  for (i=0;i<x->x_n /* - 1 */ ;i++) {
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
+    x->x_m[i] = 1.;
+  }	
+
+  
+
+  outlet_new(&x->x_obj, &s_signal);
+  return (x);
+}
+
+void mixer_list(t_mixer* x,t_symbol* s,t_int argc, t_atom* argv) 
+{
+  int chan;
+  t_float val;
+
+  if (argc != 2) {
+    post("unknown");
+    return;
+  }
+
+  chan = (int) atom_getfloat(argv++);
+  val =   atom_getfloat(argv++);
+
+
+  x->x_m[chan] = val;
+
+}
+
+
+t_int *mixer_perform(t_int *w)
+{
+  t_mixer* x = (t_mixer*) (w[1]);
+  int n = (int)(w[2]);
+  t_float **in = getbytes(sizeof(float)*x->x_n);
+  t_float *out;
+  int i,j;
+  int offset = 3;
+
+  for (i=0;i < x->x_n;i++) {
+    in[i] = (t_float *)(w[offset+i]);
+  }
+
+  out = (t_float *)(w[offset+i]);
+  
+  while (n--) {
+    *out = 0.;
+    for (j=0;j<x->x_n;j++) {
+      *out += *(in[j]++) * x->x_m[j];
+    }
+    out++;
+  }
+  return (w+offset+1+i);
+}
+
+static void mixer_dsp(t_mixer *x, t_signal **sp)
+{
+  int i;
+  t_int** myvec = getbytes(sizeof(t_int)*(x->x_n + 3));
+  
+  myvec[0] = (t_int*)x;
+  myvec[1] = (t_int*)sp[0]->s_n;
+
+  for (i=0;i < x->x_n+1;i++)
+    myvec[2 + i] = (t_int*)sp[i]->s_vec;
+
+  dsp_addv(mixer_perform, x->x_n + 3, (t_int*)myvec);
+  freebytes(myvec,sizeof(t_int)*(x->x_n + 3));
+}
+
+void mixer_tilde_setup(void)
+{
+  mixer_class = class_new(gensym("mixer~"), (t_newmethod)mixer_new, 0,
+			  sizeof(t_mixer), 0, A_DEFFLOAT, A_DEFSYM,A_NULL);
+  class_addmethod(mixer_class, nullfn, gensym("signal"), 0);
+  class_addmethod(mixer_class, (t_method)mixer_dsp, gensym("dsp"), 0);
+  
+  class_addlist(mixer_class,mixer_list);
+}
+