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+/******************************************************
+ *
+ * zexy - implementation file
+ *
+ * copyleft (c) IOhannes m zmölnig
+ *
+ * 1999:forum::für::umläute:2004
+ *
+ * institute of electronic music and acoustics (iem)
+ *
+ ******************************************************
+ *
+ * license: GNU General Public License v.2
+ *
+ ******************************************************/
+
+
+/*
+ the long waited for quantize~-object that quantizes in many possible (but equal) steps
+ of course, we´ll make a comfortable quantize of the float-signal for 16bit and 8bit
+
+ 1110:forum::für::umläute:1999
+*/
+
+#include "zexy.h"
+
+/* ------------------------ quantize~ ----------------------------- */
+
+static t_class *quantize_class;
+
+typedef struct _quantize
+{
+ t_object x_obj;
+ t_float quantiz, dequantiz;
+} t_quantize;
+
+static void quantize_float(t_quantize *x, t_floatarg f)
+{
+ x->quantiz = f;
+ x->dequantiz = 1./f;
+}
+
+static void quantize_16bit(t_quantize *x)
+{
+ x->quantiz = 32768.;
+ x->dequantiz = 1./32768.;
+}
+
+static void quantize_8bit(t_quantize *x)
+{
+ x->quantiz = 128.;
+ x->dequantiz = 1./128.;
+}
+
+static t_int *quantize_perform(t_int *w)
+{
+ t_quantize *x = (t_quantize *)(w[1]);
+ t_float *in = (t_float *)(w[2]);
+ t_float *out = (t_float *)(w[3]);
+ int n = (int)(w[4]);
+
+ t_float quantiz = x->quantiz, dequantiz = x->dequantiz;
+
+ if (quantiz)
+ while (n--) *out++ = dequantiz*(int)(quantiz**in++);
+ else while (n--) *out++ = *in++;
+
+ return (w+5);
+}
+
+static void quantize_dsp(t_quantize *x, t_signal **sp)
+{
+ dsp_add(quantize_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
+static void helper(t_quantize *x)
+{
+ post("%c quantize~-object\t:: used for quantizing signals by various degrees", HEARTSYMBOL);
+ post("<quants> : quantize a signal into <quants> steps ('0' turns quantizing off)\n"
+ "'8bit' : quantize to 8 bit\n"
+ "'16bit' : quantize to 16 bit (default)\n"
+ "'float' : pass-through the signal unchanged\n"
+ "'help' : view this\n"
+ "signal~\n");
+ post("creation:: \"quantize~ [<quants>]\"");
+
+}
+
+static void *quantize_new(t_floatarg f)
+{
+ t_quantize *x = (t_quantize *)pd_new(quantize_class);
+ outlet_new(&x->x_obj, gensym("signal"));
+ if (f) quantize_float(x, f);
+ else quantize_16bit(x);
+
+ return (x);
+}
+
+void quantize_tilde_setup(void)
+{
+ quantize_class = class_new(gensym("quantize~"), (t_newmethod)quantize_new, 0,
+ sizeof(t_quantize), 0, A_DEFFLOAT, 0);
+ class_addmethod(quantize_class, nullfn, gensym("signal"), 0);
+ class_addmethod(quantize_class, (t_method)quantize_dsp, gensym("dsp"), 0);
+
+ class_addfloat(quantize_class, quantize_float);
+ class_addmethod(quantize_class, (t_method)quantize_8bit, gensym("8bit"), 0);
+ class_addmethod(quantize_class, (t_method)quantize_16bit, gensym("16bit"), 0);
+
+ class_addmethod(quantize_class, (t_method)helper, gensym("help"), 0);
+ class_sethelpsymbol(quantize_class, gensym("zexy/quantize~"));
+ zexy_register("quantize~");
+}