From 6b378329aa20ec2caa3f06968c2ac71d41dca7f9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?IOhannes=20m=20zm=C3=B6lnig?= Date: Tue, 17 May 2005 16:50:28 +0000 Subject: renamed *_tilde.c-files to *~.c svn path=/trunk/externals/zexy/; revision=2998 --- src/envrms_tilde.c | 150 ----------------------------------------------------- 1 file changed, 150 deletions(-) delete mode 100644 src/envrms_tilde.c (limited to 'src/envrms_tilde.c') diff --git a/src/envrms_tilde.c b/src/envrms_tilde.c deleted file mode 100644 index e9dc302..0000000 --- a/src/envrms_tilde.c +++ /dev/null @@ -1,150 +0,0 @@ -/****************************************************** - * - * zexy - implementation file - * - * copyleft (c) IOhannes m zmölnig - * - * 1999:forum::für::umläute:2004 - * - * institute of electronic music and acoustics (iem) - * - ****************************************************** - * - * license: GNU General Public License v.2 - * - ******************************************************/ - -/* ---------------- envrms~ - simple envelope follower. ----------------- */ -/* this is exactly the same as msp's env~-object, but does not output dB but RMS !! */ -/* i found env~+dbtorms most inconvenient (and expensive...) */ - -#include "zexy.h" -#include - -#define MAXOVERLAP 10 -#define MAXVSTAKEN 64 - -t_class *sigenvrms_class; - -typedef struct sigenvrms -{ - t_object x_obj; /* header */ - void *x_outlet; /* a "float" outlet */ - void *x_clock; /* a "clock" object */ - float *x_buf; /* a Hanning window */ - int x_phase; /* number of points since last output */ - int x_period; /* requested period of output */ - int x_realperiod; /* period rounded up to vecsize multiple */ - int x_npoints; /* analysis window size in samples */ - float x_result; /* result to output */ - float x_sumbuf[MAXOVERLAP]; /* summing buffer */ -} t_sigenvrms; - -static void sigenvrms_tick(t_sigenvrms *x); - -static void *sigenvrms_new(t_floatarg fnpoints, t_floatarg fperiod) -{ - int npoints = fnpoints; - int period = fperiod; - t_sigenvrms *x; - float *buf; - int i; - - if (npoints < 1) npoints = 1024; - if (period < 1) period = npoints/2; - if (period < npoints / MAXOVERLAP + 1) - period = npoints / MAXOVERLAP + 1; - if (!(buf = getbytes(sizeof(float) * (npoints + MAXVSTAKEN)))) - { - error("env: couldn't allocate buffer"); - return (0); - } - x = (t_sigenvrms *)pd_new(sigenvrms_class); - x->x_buf = buf; - x->x_npoints = npoints; - x->x_phase = 0; - x->x_period = period; - for (i = 0; i < MAXOVERLAP; i++) x->x_sumbuf[i] = 0; - for (i = 0; i < npoints; i++) - buf[i] = (1. - cos((2 * 3.141592654 * i) / npoints))/npoints; - for (; i < npoints+MAXVSTAKEN; i++) buf[i] = 0; - x->x_clock = clock_new(x, (t_method)sigenvrms_tick); - x->x_outlet = outlet_new(&x->x_obj, gensym("float")); - return (x); -} - -static t_int *sigenvrms_perform(t_int *w) -{ - t_sigenvrms *x = (t_sigenvrms *)(w[1]); - t_float *in = (t_float *)(w[2]); - int n = (int)(w[3]); - int count; - float *sump; - in += n; - for (count = x->x_phase, sump = x->x_sumbuf; - count < x->x_npoints; count += x->x_realperiod, sump++) - { - float *hp = x->x_buf + count; - float *fp = in; - float sum = *sump; - int i; - - for (i = 0; i < n; i++) - { - fp--; - sum += *hp++ * (*fp * *fp); - } - *sump = sum; - } - sump[0] = 0; - x->x_phase -= n; - if (x->x_phase < 0) - { - x->x_result = x->x_sumbuf[0]; - for (count = x->x_realperiod, sump = x->x_sumbuf; - count < x->x_npoints; count += x->x_realperiod, sump++) - sump[0] = sump[1]; - sump[0] = 0; - x->x_phase = x->x_realperiod - n; - clock_delay(x->x_clock, 0L); - } - return (w+4); -} - -static void sigenvrms_dsp(t_sigenvrms *x, t_signal **sp) -{ - if (x->x_period % sp[0]->s_n) x->x_realperiod = - x->x_period + sp[0]->s_n - (x->x_period % sp[0]->s_n); - else x->x_realperiod = x->x_period; - dsp_add(sigenvrms_perform, 3, x, sp[0]->s_vec, sp[0]->s_n); - if (sp[0]->s_n > MAXVSTAKEN) bug("sigenvrms_dsp"); -} - -static void sigenvrms_tick(t_sigenvrms *x) /* callback function for the clock */ -{ - outlet_float(x->x_outlet, sqrtf(x->x_result)); -} - -static void sigenvrms_ff(t_sigenvrms *x) /* cleanup on free */ -{ - clock_free(x->x_clock); - freebytes(x->x_buf, (x->x_npoints + MAXVSTAKEN) * sizeof(float)); -} - -static void sigenvrms_help(void) -{ - post("envrms~\t:: envelope follower that does output rms instead of dB"); -} - - -void envrms_tilde_setup(void) -{ - sigenvrms_class = class_new(gensym("envrms~"), (t_newmethod)sigenvrms_new, - (t_method)sigenvrms_ff, sizeof(t_sigenvrms), 0, A_DEFFLOAT, A_DEFFLOAT, 0); - class_addmethod(sigenvrms_class, nullfn, gensym("signal"), 0); - class_addmethod(sigenvrms_class, (t_method)sigenvrms_dsp, gensym("dsp"), 0); - - class_addmethod(sigenvrms_class, (t_method)sigenvrms_help, gensym("help"), 0); - class_sethelpsymbol(sigenvrms_class, gensym("zexy/envrms~")); - zexy_register("envrms~"); -} -- cgit v1.2.1