From 01314ebc83191b68a8b4b31b7b9efbf531f3b1d9 Mon Sep 17 00:00:00 2001 From: Jamie Bullock Date: Tue, 10 Jan 2006 11:49:01 +0000 Subject: This commit was generated by cvs2svn to compensate for changes in r4382, which included commits to RCS files with non-trunk default branches. svn path=/trunk/externals/postlude/; revision=4383 --- flib/src/sc~.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 flib/src/sc~.c (limited to 'flib/src/sc~.c') diff --git a/flib/src/sc~.c b/flib/src/sc~.c new file mode 100644 index 0000000..47c69f5 --- /dev/null +++ b/flib/src/sc~.c @@ -0,0 +1,77 @@ +/* flib - PD library for feature extraction +Copyright (C) 2005 Jamie Bullock + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +*/ + + + +/* calculates the spectral sc of one frame, given peak frequency and amplitude to first and second inputs respectively */ + +#include "flib.h" + +static t_class *sc_class; + +typedef struct _sc { + t_object x_obj; + t_float f, x; +} t_sc; + +static t_int *sc_perform(t_int *w) +{ + t_sample *in1 = (t_sample *)(w[1]); + t_sample *in2 = (t_sample *)(w[2]); + t_sc *x = (t_sc *)(w[3]); + t_int N = (t_int)(w[4]),M = N >> 1,n; + t_float FA = 0,A = 0,C; + for (n = 0; n < M; n++){ + if (in2[n] != 0){ + FA += in1[n] * in2[n]; + A += in2[n]; + } + } + C = FA / A; + outlet_float(x->x_obj.ob_outlet, C); + return (w+5); +} + +static void sc_dsp(t_sc *x, t_signal **sp) +{ + dsp_add(sc_perform, 4, + sp[0]->s_vec, sp[1]->s_vec, x, sp[0]->s_n); +} + +static void *sc_new(void) +{ + t_sc *x = (t_sc *)pd_new(sc_class); + + inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal); + outlet_new(&x->x_obj, &s_float); + return (void *)x; +} + + +void sc_tilde_setup(void) { + sc_class = class_new(gensym("sc~"), + (t_newmethod)sc_new, + 0, sizeof(t_sc), + CLASS_DEFAULT, + A_DEFFLOAT, 0); + + class_addmethod(sc_class, + (t_method)sc_dsp, gensym("dsp"), 0); + CLASS_MAINSIGNALIN(sc_class, t_sc,f); + class_sethelpsymbol(sc_class, gensym("help-flib")); +} -- cgit v1.2.1