diff options
author | musil <tmusil@users.sourceforge.net> | 2006-12-09 02:00:52 +0000 |
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committer | musil <tmusil@users.sourceforge.net> | 2006-12-09 02:00:52 +0000 |
commit | d6b088044e161a27d49df537bbb6d998a8d0e50d (patch) | |
tree | 1a1b3a30e994767f4ef97b90194782258f2baa8a /iemlib1/src/peakenv~.c | |
parent | 32dc0c0deb13ce57f099f616ddc427296970d8a5 (diff) |
// class_sethelpsymbol();
changed help-*.pd to *-help.pd
chanded file structure to standard
1st step remove old
svn path=/trunk/externals/iemlib/; revision=6756
Diffstat (limited to 'iemlib1/src/peakenv~.c')
-rw-r--r-- | iemlib1/src/peakenv~.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/iemlib1/src/peakenv~.c b/iemlib1/src/peakenv~.c new file mode 100644 index 0000000..e821c1f --- /dev/null +++ b/iemlib1/src/peakenv~.c @@ -0,0 +1,95 @@ +/* For information on usage and redistribution, and for a DISCLAIMER OF ALL +* WARRANTIES, see the file, "LICENSE.txt," in this distribution. + +iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2006 */ + + +#include "m_pd.h" +#include "iemlib.h" +#include <math.h> + +/* ---------------- peakenv~ - simple peak-envelope-converter. ----------------- */ + +typedef struct _peakenv_tilde +{ + t_object x_obj; + t_float x_sr; + t_float x_old_peak; + t_float x_c1; + t_float x_releasetime; + t_float x_msi; +} t_peakenv_tilde; + +t_class *peakenv_tilde_class; + +static void peakenv_tilde_reset(t_peakenv_tilde *x) +{ + x->x_old_peak = 0.0f; +} + +static void peakenv_tilde_ft1(t_peakenv_tilde *x, t_floatarg f)/* release-time in ms */ +{ + if(f < 0.0f) + f = 0.0f; + x->x_releasetime = f; + x->x_c1 = exp(-1.0/(x->x_sr*0.001*x->x_releasetime)); +} + +static t_int *peakenv_tilde_perform(t_int *w) +{ + t_float *in = (t_float *)(w[1]); + t_float *out = (t_float *)(w[2]); + t_peakenv_tilde *x = (t_peakenv_tilde *)(w[3]); + int n = (int)(w[4]); + t_float peak = x->x_old_peak; + t_float c1 = x->x_c1; + t_float absolute; + int i; + + for(i=0; i<n; i++) + { + absolute = fabs(*in++); + peak *= c1; + if(absolute > peak) + peak = absolute; + *out++ = peak; + } + /* NAN protect */ + if(IEM_DENORMAL(peak)) + peak = 0.0f; + x->x_old_peak = peak; + return(w+5); +} + +static void peakenv_tilde_dsp(t_peakenv_tilde *x, t_signal **sp) +{ + x->x_sr = (t_float)sp[0]->s_sr; + peakenv_tilde_ft1(x, x->x_releasetime); + dsp_add(peakenv_tilde_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, sp[0]->s_n); +} + +static void *peakenv_tilde_new(t_floatarg f) +{ + t_peakenv_tilde *x = (t_peakenv_tilde *)pd_new(peakenv_tilde_class); + + if(f <= 0.0f) + f = 0.0f; + x->x_sr = 44100.0f; + peakenv_tilde_ft1(x, f); + x->x_old_peak = 0.0f; + inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1")); + outlet_new(&x->x_obj, &s_signal); + x->x_msi = 0; + return(x); +} + +void peakenv_tilde_setup(void) +{ + peakenv_tilde_class = class_new(gensym("peakenv~"), (t_newmethod)peakenv_tilde_new, + 0, sizeof(t_peakenv_tilde), 0, A_DEFFLOAT, 0); + CLASS_MAINSIGNALIN(peakenv_tilde_class, t_peakenv_tilde, x_msi); + class_addmethod(peakenv_tilde_class, (t_method)peakenv_tilde_dsp, gensym("dsp"), 0); + class_addmethod(peakenv_tilde_class, (t_method)peakenv_tilde_ft1, gensym("ft1"), A_FLOAT, 0); + class_addmethod(peakenv_tilde_class, (t_method)peakenv_tilde_reset, gensym("reset"), 0); +// class_sethelpsymbol(peakenv_tilde_class, gensym("iemhelp/help-peakenv~")); +} |