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-rw-r--r--tab/tabosc4c~.c244
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diff --git a/tab/tabosc4c~.c b/tab/tabosc4c~.c
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--- a/tab/tabosc4c~.c
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-// tabosc4c~
-// can replace with tabosc4~
-// most of this code comes from pd. just the interpolation shematic is diferent.
-
-/*
-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 06 2008
-
-
-#include "m_pd.h"
-
-/******************** tabosc4c~ ***********************/
-
-/* 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 *tabosc4c_tilde_class;
-
-typedef struct _tabosc4c_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_tabosc4c_tilde;
-
-static void *tabosc4c_tilde_new(t_symbol *s)
-{
- t_tabosc4c_tilde *x = (t_tabosc4c_tilde *)pd_new(tabosc4c_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;
- return (x);
-}
-
-static t_int *tabosc4c_tilde_perform(t_int *w)
-{
- t_tabosc4c_tilde *x = (t_tabosc4c_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 a3,a1,a2; // 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;
- tf.tf_d = dphase;
- dphase += *in++ * conv;
- addr = tab + (tf.tf_i[HIOFFSET] & mask);
- tf.tf_i[HIOFFSET] = normhipart;
- frac = tf.tf_d - UNITBIT32;
- a = addr[0].w_float;
- b = addr[1].w_float;
- c = addr[2].w_float;
- d = addr[3].w_float;
-// cminusb = c-b;
-// *out++ = b + frac * (
-// cminusb - 0.1666667f * (1.-frac) * (
-// (d - a - 3.0f * cminusb) * frac + (d + 2.0f*a - 3.0f*b) ) );
-// CH
-// a0 = d - c - a + b;
-// a1 = a - b - a0;
-// a2 = c - a;
-// *out++ = ((a0*frac+a1)*frac+a2)*frac+b;
-
- // 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);
-
- *out++ = ((a3 * frac + a2) * frac + a1) * frac + b;
- }
-
-
- 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 tabosc4c_tilde_set(t_tabosc4c_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, "tabosc4c~: %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 tabosc4c~", x->x_arrayname->s_name);
- x->x_vec = 0;
- }
- else if ((npoints = pointsinarray - 3) != (1 << ilog2(pointsinarray - 3)))
- {
- pd_error(x, "%s: number of points (%d) not a power of 2 plus three",
- x->x_arrayname->s_name, pointsinarray);
- x->x_vec = 0;
- garray_usedindsp(a);
- }
- else
- {
- x->x_fnpoints = npoints;
- x->x_finvnpoints = 1./npoints;
- garray_usedindsp(a);
- }
-}
-
-static void tabosc4c_tilde_ft1(t_tabosc4c_tilde *x, t_float f)
-{
- x->x_phase = f;
-}
-
-static void tabosc4c_tilde_dsp(t_tabosc4c_tilde *x, t_signal **sp)
-{
- x->x_conv = 1. / sp[0]->s_sr;
- tabosc4c_tilde_set(x, x->x_arrayname);
-
- dsp_add(tabosc4c_tilde_perform, 4, x,
- sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
-}
-
-void tabosc4c_tilde_setup(void)
-{
- tabosc4c_tilde_class = class_new(gensym("tabosc4c~"),
- (t_newmethod)tabosc4c_tilde_new, 0,
- sizeof(t_tabosc4c_tilde), 0, A_DEFSYM, 0);
- CLASS_MAINSIGNALIN(tabosc4c_tilde_class, t_tabosc4c_tilde, x_f);
- class_addmethod(tabosc4c_tilde_class, (t_method)tabosc4c_tilde_dsp,
- gensym("dsp"), 0);
- class_addmethod(tabosc4c_tilde_class, (t_method)tabosc4c_tilde_set,
- gensym("set"), A_SYMBOL, 0);
- class_addmethod(tabosc4c_tilde_class, (t_method)tabosc4c_tilde_ft1,
- gensym("ft1"), A_FLOAT, 0);
-}
-
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