diff options
Diffstat (limited to 'hardlimit~.c')
| -rw-r--r-- | hardlimit~.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/hardlimit~.c b/hardlimit~.c new file mode 100644 index 0000000..3ae1e10 --- /dev/null +++ b/hardlimit~.c @@ -0,0 +1,81 @@ +// sigpack
+// for
+// pure-data
+// by weiss
+// www.weiss-archiv.de
+
+#include "m_pd.h"
+#include <math.h>
+#ifdef _MSC_VER
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+// ------------------------ hardlimit~ -----------------------------
+// brick hard limiter with residue mixer
+// code from swh_plugins by steve harris www.plugin.org.uk
+
+static t_class *hardlimit_tilde_class;
+
+typedef struct _hardlimit_tilde
+{
+ t_object x_obj;
+ t_sample x_limit_db;//-50.0 - 0.0
+ t_sample x_wet_gain;//0.0 - 1.0
+ t_sample x_res_gain;//0.0 - 1.0
+ float x_f;
+} t_hardlimit_tilde;
+
+static void *hardlimit_tilde_new(t_floatarg limitdb, t_floatarg wetgain, t_floatarg resgain)
+{
+ t_hardlimit_tilde *x = (t_hardlimit_tilde *)pd_new(hardlimit_tilde_class);
+ x->x_limit_db = limitdb;
+ x->x_wet_gain = wetgain;
+ x->x_res_gain = resgain;
+ outlet_new(&x->x_obj, gensym("signal"));
+ floatinlet_new(&x->x_obj, &x->x_limit_db);
+ floatinlet_new(&x->x_obj, &x->x_wet_gain);
+ floatinlet_new(&x->x_obj, &x->x_res_gain);
+ x->x_f = 0;
+ if (limitdb) x->x_limit_db = limitdb;
+ else x->x_limit_db = 0.0;
+ if (wetgain) x->x_wet_gain = wetgain;
+ else x->x_wet_gain = 0.0;
+ if (resgain) x->x_res_gain = resgain;
+ else x->x_res_gain = 0.0;
+ return (x);
+}
+
+static t_int *hardlimit_tilde_perform(t_int *w)
+{
+ t_hardlimit_tilde *x = (t_hardlimit_tilde *)(w[1]);
+ t_float *in = (t_float *)(w[2]);
+ t_float *out = (t_float *)(w[3]);
+ int n = (int)(w[4]);
+ float f;
+ float limit_g, sign, data, residue;
+ while (n--)
+ {
+ f = *in++;
+ limit_g = pow(10, x->x_limit_db / 20);
+ sign = f < 0.0 ? -1.0 : 1.0;
+ data = f * sign;
+ residue = data > limit_g ? data - limit_g : 0.0;
+ data -= residue;
+ *out++ = sign * (x->x_wet_gain * data + x->x_res_gain * residue);
+ }
+ return (w+5);
+}
+
+static void hardlimit_tilde_dsp(t_hardlimit_tilde *x, t_signal **sp)
+{
+ dsp_add(hardlimit_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
+void hardlimit_tilde_setup(void)
+{
+ hardlimit_tilde_class = class_new(gensym("hardlimit~"), (t_newmethod)hardlimit_tilde_new, 0,
+ sizeof(t_hardlimit_tilde), 0, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0);
+ CLASS_MAINSIGNALIN(hardlimit_tilde_class, t_hardlimit_tilde, x_f);
+ class_addmethod(hardlimit_tilde_class, (t_method)hardlimit_tilde_dsp, gensym("dsp"), 0);
+}
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