aboutsummaryrefslogtreecommitdiff
path: root/tab/tabosci~.c
diff options
context:
space:
mode:
Diffstat (limited to 'tab/tabosci~.c')
-rw-r--r--tab/tabosci~.c320
1 files changed, 0 insertions, 320 deletions
diff --git a/tab/tabosci~.c b/tab/tabosci~.c
deleted file mode 100644
index 9936c77..0000000
--- a/tab/tabosci~.c
+++ /dev/null
@@ -1,320 +0,0 @@
-// tabosci~
-// tabosc interpolation
-// can replace tabosc4~
-// most of this code comes from pd. but with somes modifications
-
-/*
-This software is copyrighted by Miller Puckette and others. The following
-terms (the "Standard Improved BSD License") apply to all files associated with
-the software unless explicitly disclaimed in individual files:
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
-2. Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following
- disclaimer in the documentation and/or other materials provided
- with the distribution.
-3. The name of the author may not be used to endorse or promote
- products derived from this software without specific prior
- written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
-EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
-BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
-THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-// Cyrille Henry 02 2009
-
-
-#include "m_pd.h"
-#include <math.h>
-
-#define max(a,b) ( ((a) > (b)) ? (a) : (b) )
-#define min(a,b) ( ((a) < (b)) ? (a) : (b) )
-
-/******************** tabosci~ ***********************/
-
-/* this is all copied from d_osc.c... what include file could this go in? */
-#define UNITBIT32 1572864. /* 3*2^19; bit 32 has place value 1 */
-
- /* machine-dependent definitions. These ifdefs really
- should have been by CPU type and not by operating system! */
-#ifdef IRIX
- /* big-endian. Most significant byte is at low address in memory */
-#define HIOFFSET 0 /* word offset to find MSB */
-#define LOWOFFSET 1 /* word offset to find LSB */
-#define int32 long /* a data type that has 32 bits */
-#endif /* IRIX */
-
-#ifdef MSW
- /* little-endian; most significant byte is at highest address */
-#define HIOFFSET 1
-#define LOWOFFSET 0
-#define int32 long
-#endif
-
-#if defined(__FreeBSD__) || defined(__APPLE__)
-#include <machine/endian.h>
-#endif
-
-#ifdef __linux__
-#include <endian.h>
-#endif
-
-#if defined(__unix__) || defined(__APPLE__)
-#if !defined(BYTE_ORDER) || !defined(LITTLE_ENDIAN)
-#error No byte order defined
-#endif
-
-#if BYTE_ORDER == LITTLE_ENDIAN
-#define HIOFFSET 1
-#define LOWOFFSET 0
-#else
-#define HIOFFSET 0 /* word offset to find MSB */
-#define LOWOFFSET 1 /* word offset to find LSB */
-#endif /* __BYTE_ORDER */
-#include <sys/types.h>
-#define int32 int32_t
-#endif /* __unix__ or __APPLE__*/
-
-union tabfudge
-{
- double tf_d;
- int32 tf_i[2];
-};
-
-static t_class *tabosci_tilde_class;
-
-typedef struct _tabosci_tilde
-{
- t_object x_obj;
- t_float x_fnpoints;
- t_float x_finvnpoints;
- t_word *x_vec;
- t_symbol *x_arrayname;
- t_float x_f;
- double x_phase;
- t_float x_conv;
- t_sample x_prev_in, x_last_in, x_prev_out, x_last_out;
- t_float x_fa1, x_fa2, x_fb1, x_fb2, x_fb3;
- t_float cutoff;
- t_int upsample;
- t_float x_sr;
-} t_tabosci_tilde;
-
-void tabosci_tilde_cutoff(t_tabosci_tilde *x, t_float cut)
-{
- x->cutoff = cut;
-
- if (x->cutoff == 0)
- {
- x->x_fb1 = 1;
- x->x_fb2 = 0;
- x->x_fb3 = 0;
- x->x_fa1 = 0;
- x->x_fa2 = 0;
-
- x->x_prev_in = 0;
- x->x_last_in = 0;
- x->x_prev_out = 0; // reset filter memory
- }
- else
- {
- // filter coef to cut all high freq.
- t_float tmp1, tmp2;
-
- tmp1 = sqrt(2)/2;
- tmp1 = sinh(tmp1);
-
- tmp2 = x->cutoff * 2 * 3.1415926 / (x->upsample * x->x_sr);
- tmp2 = min(6.28,tmp2);
-
- tmp1 *= sin(tmp2);
- tmp2 = cos(tmp2);
-
- x->x_fb1 = (1-tmp2 ) /2;
- x->x_fb2 = (1-tmp2 );
- x->x_fb3 = (1-tmp2 ) /2;
- x->x_fa1 = -2 * tmp2;
- x->x_fa2 = 1 - tmp1;
-
- tmp1 +=1;
-
- x->x_fb1 /= tmp1;
- x->x_fb2 /= tmp1;
- x->x_fb3 /= tmp1;
- x->x_fa1 /= tmp1;
- x->x_fa2 /= tmp1;
- }
-}
-
-static void *tabosci_tilde_new(t_symbol *s)
-{
- t_tabosci_tilde *x = (t_tabosci_tilde *)pd_new(tabosci_tilde_class);
- x->x_arrayname = s;
- x->x_vec = 0;
- x->x_fnpoints = 512.;
- x->x_finvnpoints = (1./512.);
- outlet_new(&x->x_obj, gensym("signal"));
- inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
- x->x_f = 0;
- x->cutoff = 0;
- x->upsample = 1;
- x->x_sr = 0;
- tabosci_tilde_cutoff(x,0); // comput filter coef
- return (x);
-}
-
-static t_int *tabosci_tilde_perform(t_int *w)
-{
- t_tabosci_tilde *x = (t_tabosci_tilde *)(w[1]);
- t_sample *in = (t_sample *)(w[2]);
- t_sample *out = (t_sample *)(w[3]);
- int n = (int)(w[4]);
- int normhipart;
- union tabfudge tf;
- double a1,a2,a3; // CH : for the interpolation
- t_float fnpoints = x->x_fnpoints;
- int mask = fnpoints - 1;
- t_float conv = fnpoints * x->x_conv;
- int maxindex;
- t_word *tab = x->x_vec, *addr;
- int i;
- double dphase = fnpoints * x->x_phase + UNITBIT32;
-
- if (!tab) goto zero;
- tf.tf_d = UNITBIT32;
- normhipart = tf.tf_i[HIOFFSET];
-
- while (n--)
- {
- t_sample frac, a, b, c, d, cminusb, temp, filter_out;
-
- for (i=0;i<x->upsample;i++)
- {
- tf.tf_d = dphase;
- dphase += *in/x->upsample * conv;
- addr = tab + (tf.tf_i[HIOFFSET] & mask);
- a = addr[0].w_float;
- addr = tab + ((1+tf.tf_i[HIOFFSET]) & mask);
- b = addr[0].w_float;
- addr = tab + ((2+tf.tf_i[HIOFFSET]) & mask);
- c = addr[0].w_float;
- addr = tab + ((3+tf.tf_i[HIOFFSET]) & mask);
- d = addr[0].w_float;
- tf.tf_i[HIOFFSET] = normhipart;
- frac = tf.tf_d - UNITBIT32;
-
- // 4-point, 3rd-order Hermite (x-form)
- a1 = 0.5f * (c - a);
- a2 = a - 2.5 * b + 2.f * c - 0.5f * d;
- a3 = 0.5f * (d - a) + 1.5f * (b - c);
-
- temp = ((a3 * frac + a2) * frac + a1) * frac + b;
-
- filter_out = x->x_fb1* temp + x->x_fb2 * x->x_last_in + x->x_fb3 * x->x_prev_in - x->x_fa1 * x->x_last_out - x->x_fa2 * x->x_prev_out;
- // low pass
-
- x->x_prev_in = x->x_last_in;
- x->x_last_in = temp;
- x->x_prev_out = x->x_last_out;
- x->x_last_out = filter_out;
- }
- *out++ = x->x_last_out;
- *in++;
- }
-
- tf.tf_d = UNITBIT32 * fnpoints;
- normhipart = tf.tf_i[HIOFFSET];
- tf.tf_d = dphase + (UNITBIT32 * fnpoints - UNITBIT32);
- tf.tf_i[HIOFFSET] = normhipart;
- x->x_phase = (tf.tf_d - UNITBIT32 * fnpoints) * x->x_finvnpoints;
- return (w+5);
- zero:
- while (n--) *out++ = 0;
-
- return (w+5);
-}
-
-void tabosci_tilde_set(t_tabosci_tilde *x, t_symbol *s)
-{
- t_garray *a;
- int npoints, pointsinarray;
-
- x->x_arrayname = s;
- if (!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
- {
- if (*s->s_name)
- pd_error(x, "tabosci~: %s: no such array", x->x_arrayname->s_name);
- x->x_vec = 0;
- }
- else if (!garray_getfloatwords(a, &pointsinarray, &x->x_vec))
- {
- pd_error(x, "%s: bad template for tabosci~", x->x_arrayname->s_name);
- x->x_vec = 0;
- }
- else
- {
- npoints = 1 << ilog2(pointsinarray);
-// if ( npoints != pointsinarray) post("warning, tabosci~ is using only the first %d points of array %s",npoints, x->x_arrayname->s_name);
- x->x_fnpoints = npoints;
- x->x_finvnpoints = 1./npoints;
- garray_usedindsp(a);
- }
-}
-
-
-void tabosci_tilde_upsample(t_tabosci_tilde *x, t_float up)
-{
- x->upsample = max(1,up);
- tabosci_tilde_cutoff(x,x->cutoff);
-}
-
-static void tabosci_tilde_ft1(t_tabosci_tilde *x, t_float f)
-{
- x->x_phase = f;
-}
-
-static void tabosci_tilde_dsp(t_tabosci_tilde *x, t_signal **sp)
-{
- if (x->x_sr != sp[0]->s_sr)
- {
- x->x_sr = sp[0]->s_sr;
- tabosci_tilde_cutoff(x,x->cutoff);
- x->x_conv = 1. / sp[0]->s_sr;
- }
- tabosci_tilde_set(x, x->x_arrayname);
- dsp_add(tabosci_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
-}
-
-void tabosci_tilde_setup(void)
-{
- tabosci_tilde_class = class_new(gensym("tabosci~"),
- (t_newmethod)tabosci_tilde_new, 0,
- sizeof(t_tabosci_tilde), 0, A_DEFSYM, 0);
- CLASS_MAINSIGNALIN(tabosci_tilde_class, t_tabosci_tilde, x_f);
- class_addmethod(tabosci_tilde_class, (t_method)tabosci_tilde_dsp,
- gensym("dsp"), 0);
- class_addmethod(tabosci_tilde_class, (t_method)tabosci_tilde_set,
- gensym("set"), A_SYMBOL, 0);
- class_addmethod(tabosci_tilde_class, (t_method)tabosci_tilde_cutoff,
- gensym("cutoff"), A_FLOAT, 0);
- class_addmethod(tabosci_tilde_class, (t_method)tabosci_tilde_upsample,
- gensym("upsample"), A_FLOAT, 0);
- class_addmethod(tabosci_tilde_class, (t_method)tabosci_tilde_ft1,
- gensym("ft1"), A_FLOAT, 0);
-}
-
generated by cgit v1.2.1 (git 2.18.0) at 2024-07-17 00:00:56 +0000