From 71b83fc040b848c98c5065d95ecbc72b0b4f8943 Mon Sep 17 00:00:00 2001 From: Hans-Christoph Steiner Date: Thu, 17 Jan 2013 22:54:00 +0000 Subject: merging maxlib v1.5.5 from branches/pd-extended/0.43 svn path=/trunk/externals/maxlib/; revision=16897 --- scale.c | 276 ++++++++++++++++++++++++++++++++-------------------------------- 1 file changed, 138 insertions(+), 138 deletions(-) (limited to 'scale.c') diff --git a/scale.c b/scale.c index 890b38d..3654249 100644 --- a/scale.c +++ b/scale.c @@ -1,138 +1,138 @@ -/* ------------------------- scale ------------------------------------------ */ -/* */ -/* Scales input to lie within an output range. */ -/* Written by Olaf Matthes */ -/* Get source at http://www.akustische-kunst.org/puredata/maxlib/ */ -/* */ -/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -/* */ -/* Based on PureData by Miller Puckette and others. */ -/* */ -/* ---------------------------------------------------------------------------- */ - -#include "m_pd.h" -#include -#include - -static char *version = "scale v0.2, written by Olaf Matthes "; - -typedef struct scale -{ - t_object x_ob; - t_float x_f; /* current input value */ - t_float x_il; /* low border of input range */ - t_float x_ih; /* high border of input range */ - t_float x_ol; /* low border of output range */ - t_float x_oh; /* high border of output range */ - t_float x_logcoeff; /* log-coefficient */ - t_outlet *x_outlet1; /* result */ -} t_scale; - -static void scale_float(t_scale *x, t_floatarg f) -{ - t_float ir = x->x_ih - x->x_il; - t_float or = x->x_oh - x->x_ol; - double oq; - double result; - double k; - if(ir == 0) - { - post("scale: input range must not be 0"); - return; - } - /* we accept an output range of 0 in case someone really wants this */ - if(!x->x_logcoeff) /* linear */ - { - k = (or / ir); - result = ((f - x->x_il) * k) + x->x_ol; - } - else /* logarythmical scale */ - { - oq = x->x_oh / x->x_ol; - // k = (log((double)oq)/log(x->x_logcoeff))/((double)ir); - k = log((double)oq)/((double)ir); - - if(x->x_ol) - { - // result = (double)x->x_ol*exp(k*(double)(f - x->x_il)*log(x->x_logcoeff)); - result = (double)x->x_ol*exp(k*(double)(f - x->x_il)); - } - else - { - /* in case the low output is 0 we have to cheat... */ - /* okay, here's the chating: we calculate for a lower out limit - of 1 and remove this shift after the calculation */ - result = ((double)(x->x_ol+1)*exp(k*(double)(f - x->x_il)))-1.0; - } - } - - x->x_f = f; /* save current input value */ - - outlet_float(x->x_outlet1, result); -} - -static void scale_bang(t_scale *x) -{ - scale_float(x, x->x_f); /* recalculate result */ -} - -static t_class *scale_class; - -static void *scale_new(t_floatarg fil, t_floatarg fih, t_floatarg fol, t_floatarg foh, t_floatarg flc) -{ - t_scale *x = (t_scale *)pd_new(scale_class); - - floatinlet_new(&x->x_ob, &x->x_il); - floatinlet_new(&x->x_ob, &x->x_ih); - floatinlet_new(&x->x_ob, &x->x_ol); - floatinlet_new(&x->x_ob, &x->x_oh); - floatinlet_new(&x->x_ob, &x->x_logcoeff); - - x->x_outlet1 = outlet_new(&x->x_ob, gensym("float")); - - /* default values taken from Max's scale */ - x->x_il = fil; - x->x_ih = fih; - if(!x->x_ih)x->x_ih = 127.0; - x->x_ol = fol; - x->x_oh = foh; - if(!x->x_oh)x->x_oh = 1.0; - x->x_logcoeff = flc; - x->x_f = 0; - - return (void *)x; -} - -#ifndef MAXLIB -void scale_setup(void) -{ - scale_class = class_new(gensym("scale"), (t_newmethod)scale_new, - 0, sizeof(t_scale), 0, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0); - class_addfloat(scale_class, scale_float); - class_addbang(scale_class, scale_bang); - - post(version); -#else -void maxlib_scale_setup(void) -{ - scale_class = class_new(gensym("maxlib_scale"), (t_newmethod)scale_new, - 0, sizeof(t_scale), 0, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0); - class_addcreator((t_newmethod)scale_new, gensym("scale"), A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0); - class_addfloat(scale_class, scale_float); - class_addbang(scale_class, scale_bang); - class_sethelpsymbol(scale_class, gensym("maxlib/scale-help.pd")); -#endif -} - +/* ------------------------- scale ------------------------------------------ */ +/* */ +/* Scales input to lie within an output range. */ +/* Written by Olaf Matthes */ +/* Get source at http://www.akustische-kunst.org/puredata/maxlib/ */ +/* */ +/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +/* */ +/* Based on PureData by Miller Puckette and others. */ +/* */ +/* ---------------------------------------------------------------------------- */ + +#include "m_pd.h" +#include +#include + +static char *version = "scale v0.2, written by Olaf Matthes "; + +typedef struct scale +{ + t_object x_ob; + t_float x_f; /* current input value */ + t_float x_il; /* low border of input range */ + t_float x_ih; /* high border of input range */ + t_float x_ol; /* low border of output range */ + t_float x_oh; /* high border of output range */ + t_float x_logcoeff; /* log-coefficient */ + t_outlet *x_outlet1; /* result */ +} t_scale; + +static void scale_float(t_scale *x, t_floatarg f) +{ + t_float ir = x->x_ih - x->x_il; + t_float or = x->x_oh - x->x_ol; + double oq; + double result; + double k; + if(ir == 0) + { + post("scale: input range must not be 0"); + return; + } + /* we accept an output range of 0 in case someone really wants this */ + if(!x->x_logcoeff) /* linear */ + { + k = (or / ir); + result = ((f - x->x_il) * k) + x->x_ol; + } + else /* logarythmical scale */ + { + oq = x->x_oh / x->x_ol; + // k = (log((double)oq)/log(x->x_logcoeff))/((double)ir); + k = log((double)oq)/((double)ir); + + if(x->x_ol) + { + // result = (double)x->x_ol*exp(k*(double)(f - x->x_il)*log(x->x_logcoeff)); + result = (double)x->x_ol*exp(k*(double)(f - x->x_il)); + } + else + { + /* in case the low output is 0 we have to cheat... */ + /* okay, here's the chating: we calculate for a lower out limit + of 1 and remove this shift after the calculation */ + result = ((double)(x->x_ol+1)*exp(k*(double)(f - x->x_il)))-1.0; + } + } + + x->x_f = f; /* save current input value */ + + outlet_float(x->x_outlet1, result); +} + +static void scale_bang(t_scale *x) +{ + scale_float(x, x->x_f); /* recalculate result */ +} + +static t_class *scale_class; + +static void *scale_new(t_floatarg fil, t_floatarg fih, t_floatarg fol, t_floatarg foh, t_floatarg flc) +{ + t_scale *x = (t_scale *)pd_new(scale_class); + + floatinlet_new(&x->x_ob, &x->x_il); + floatinlet_new(&x->x_ob, &x->x_ih); + floatinlet_new(&x->x_ob, &x->x_ol); + floatinlet_new(&x->x_ob, &x->x_oh); + floatinlet_new(&x->x_ob, &x->x_logcoeff); + + x->x_outlet1 = outlet_new(&x->x_ob, gensym("float")); + + /* default values taken from Max's scale */ + x->x_il = fil; + x->x_ih = fih; + if(!x->x_ih)x->x_ih = 127.0; + x->x_ol = fol; + x->x_oh = foh; + if(!x->x_oh)x->x_oh = 1.0; + x->x_logcoeff = flc; + x->x_f = 0; + + return (void *)x; +} + +#ifndef MAXLIB +void scale_setup(void) +{ + scale_class = class_new(gensym("scale"), (t_newmethod)scale_new, + 0, sizeof(t_scale), 0, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0); + class_addfloat(scale_class, scale_float); + class_addbang(scale_class, scale_bang); + + logpost(NULL, 4, version); +#else +void maxlib_scale_setup(void) +{ + scale_class = class_new(gensym("maxlib_scale"), (t_newmethod)scale_new, + 0, sizeof(t_scale), 0, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0); + class_addcreator((t_newmethod)scale_new, gensym("scale"), A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0); + class_addfloat(scale_class, scale_float); + class_addbang(scale_class, scale_bang); + class_sethelpsymbol(scale_class, gensym("maxlib/scale-help.pd")); +#endif +} + -- cgit v1.2.1