From bc72a2afa7d60e06e90920ee26c615e99e9a659a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Juha=20Vehvil=C3=A4inen?= Date: Sun, 6 Oct 2002 05:14:51 +0000 Subject: This commit was generated by cvs2svn to compensate for changes in r159, which included commits to RCS files with non-trunk default branches. svn path=/trunk/externals/susloop~/; revision=160 --- susloop~/susloop~.c | 149 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 149 insertions(+) create mode 100644 susloop~/susloop~.c (limited to 'susloop~/susloop~.c') diff --git a/susloop~/susloop~.c b/susloop~/susloop~.c new file mode 100644 index 0000000..bdde314 --- /dev/null +++ b/susloop~/susloop~.c @@ -0,0 +1,149 @@ +/* Copyright 2002 Benjamin R. Saylor + * + * 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 + */ + +#include "m_pd.h" + +static t_class *susloop_class; + +static t_float pdsr; /* pd's sample rate */ + +typedef struct _susloop { + t_object x_obj; + t_float a; /* beginning of loop */ + t_float b; /* end of loop */ + t_float startpos; /* start offset */ + t_float pos; /* position in sample */ + t_float direction; /* for pingpong loops */ + t_float f; /* dummy for when input is float instead of signal */ + void (*susloop_func)(t_int *x, t_float *in, t_float *out, int n); /* can be forward or pingpong */ +} t_susloop; + +static void susloop_forward(t_int *x, t_float *in, t_float *out, int n) +{ + t_float sr; + t_float p = ((t_susloop *)x)->pos; + t_float a = ((t_susloop *)x)->a; + t_float b = ((t_susloop *)x)->b; + + while (n--) { + sr = *in; + if (p > b) { + p = a + (p - b); + } + *out = p; + p += sr/pdsr; + in++; + out++; + } + + ((t_susloop *)x)->pos = p; +} + +static void susloop_pingpong(t_int *x, t_float *in, t_float *out, int n) +{ + t_float sr; + t_float p = ((t_susloop *)x)->pos; + t_float a = ((t_susloop *)x)->a; + t_float b = ((t_susloop *)x)->b; + t_float d = ((t_susloop *)x)->direction; + + while (n--) { + sr = *in; + if (p > b) { + p = b - (p - b); + d = -1; + } else if (p < a && d < 0) { + p = a + (a - p); + d = 1; + } + *out = p; + p += d*(sr/pdsr); + in++; + out++; + } + + ((t_susloop *)x)->pos = p; + ((t_susloop *)x)->direction = d; +} + +static t_int *susloop_perform(t_int *w) +{ + ((t_susloop *)w[1])->susloop_func((t_int *)w[1], (t_float *)(w[2]), (t_float *)(w[3]), (int)(w[4])); + return (w+5); +} + +static void susloop_dsp(t_susloop *x, t_signal **sp) +{ + dsp_add(susloop_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n); +} + +static void *susloop_new(t_symbol *s, int argc, t_atom *argv) +{ + t_susloop *x = (t_susloop *)pd_new(susloop_class); + int looptype = 0; + x->a = x->b = x->startpos = 0; + x->direction = 1; + x->susloop_func = susloop_forward; + + switch (argc) { + case 4: + x->startpos = atom_getfloat(argv+3); + case 3: + looptype = atom_getint(argv+2); + if (looptype == 0) + x->susloop_func = susloop_forward; + else + x->susloop_func = susloop_pingpong; + case 2: + x->a = atom_getfloat(argv); + x->b = atom_getfloat(argv+1); + } + + floatinlet_new(&x->x_obj, &x->a); + floatinlet_new(&x->x_obj, &x->b); + floatinlet_new(&x->x_obj, &x->startpos); + outlet_new(&x->x_obj, gensym("signal")); + return (x); +} + +static void susloop_bang(t_susloop *x) +{ + x->pos = x->startpos; + x->direction = 1; +} + +static void susloop_setfunc(t_susloop *x, t_floatarg type) +{ + if (type == 1) { + x->direction = 1; + x->susloop_func = susloop_pingpong; + } else + x->susloop_func = susloop_forward; +} + +void susloop_tilde_setup(void) +{ + pdsr = sys_getsr(); + susloop_class = class_new(gensym("susloop~"), (t_newmethod)susloop_new, 0, sizeof(t_susloop), 0, A_GIMME, 0); + class_addbang(susloop_class, susloop_bang); + /* + class_addmethod(susloop_class, nullfn, gensym("signal"), 0); + */ + CLASS_MAINSIGNALIN(susloop_class, t_susloop, f); + class_addmethod(susloop_class, (t_method)susloop_dsp, gensym("dsp"), 0); + class_addmethod(susloop_class, (t_method)susloop_setfunc, gensym("type"), A_DEFFLOAT, 0); +} -- cgit v1.2.1