diff options
| author | Hans-Christoph Steiner <eighthave@users.sourceforge.net> | 2010-02-09 21:40:51 +0000 |
|---|---|---|
| committer | Hans-Christoph Steiner <eighthave@users.sourceforge.net> | 2010-02-09 21:40:51 +0000 |
| commit | 6a9bc88d7b52fc35b9fe3597cd29d9fbe90387ee (patch) | |
| tree | a056eb4d6d3115bfa5d030c1899ef4bc1026df45 /impulse~.c | |
| parent | f9e3fe480e7e3c448a626d508f1976f4fec2f759 (diff) | |
updated to sigpack-0.04-win32.zip and committed forgotten debian files
svn path=/trunk/externals/sigpack/; revision=13154
Diffstat (limited to 'impulse~.c')
| -rw-r--r-- | impulse~.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/impulse~.c b/impulse~.c new file mode 100644 index 0000000..96cc99a --- /dev/null +++ b/impulse~.c @@ -0,0 +1,78 @@ +// sigpack
+// for
+// pure-data
+// by weiss
+// www.weiss-archiv.de
+
+#include "m_pd.h"
+#ifdef _MSC_VER
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+// ------------------------ impulse~ -----------------------------
+// non-bandlimited single-sample impulses
+// code from swh_plugins by steve harris www.plugin.org.uk
+
+static t_class *impulse_tilde_class;
+
+typedef struct _impulse_tilde
+{
+ t_object x_obj;
+ t_sample x_phase;
+ t_sample x_sample_rate;
+ float x_f;
+} t_impulse_tilde;
+
+static void *impulse_tilde_new(t_floatarg f)
+{
+ t_impulse_tilde *x = (t_impulse_tilde *)pd_new(impulse_tilde_class);
+ x->x_f = f;
+ x->x_phase = 0.f;
+ x->x_sample_rate = sys_getsr();//later put this in impulse_tilde_dsp???
+ outlet_new(&x->x_obj, gensym("signal"));
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
+ return (x);
+}
+
+static t_int *impulse_tilde_perform(t_int *w)
+{
+ t_impulse_tilde *x = (t_impulse_tilde *)(w[1]);
+ t_float *in = (t_float *)(w[2]);
+ t_float *out = (t_float *)(w[3]);
+ int n = (int)(w[4]);
+ float f, phase_step, value;
+ while (n--)
+ {
+ f = *(in++);
+ phase_step = f / x->x_sample_rate;
+ if (x->x_phase > 1.f) {
+ x->x_phase -= 1.f;
+ value = 1.f;
+ } else {
+ value = 0.f;
+ }
+ *out++ = value;
+ x->x_phase += phase_step;
+ }
+ return (w+5);
+}
+
+static void impulse_tilde_ft1(t_impulse_tilde *x, t_float f)
+{
+ x->x_phase = f;
+}
+
+static void impulse_tilde_dsp(t_impulse_tilde *x, t_signal **sp)
+{
+ dsp_add(impulse_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
+void impulse_tilde_setup(void)
+{
+ impulse_tilde_class = class_new(gensym("impulse~"), (t_newmethod)impulse_tilde_new, 0,
+ sizeof(t_impulse_tilde), 0, A_DEFFLOAT, 0);
+ CLASS_MAINSIGNALIN(impulse_tilde_class, t_impulse_tilde, x_f);
+ class_addmethod(impulse_tilde_class, (t_method)impulse_tilde_dsp, gensym("dsp"), 0);
+ class_addmethod(impulse_tilde_class, (t_method)impulse_tilde_ft1, gensym("ft1"), A_FLOAT, 0);
+}
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