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Diffstat (limited to 'tab/tabosc4aa~.c')
| -rw-r--r-- | tab/tabosc4aa~.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/tab/tabosc4aa~.c b/tab/tabosc4aa~.c new file mode 100644 index 0000000..8ebf5b8 --- /dev/null +++ b/tab/tabosc4aa~.c @@ -0,0 +1,255 @@ +// tabosc4aa~ +// 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" + +/******************** tabosc4aa~ ***********************/ + +/* 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 *tabosc4aa_tilde_class; + +typedef struct _tabosc4aa_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_tabosc4aa_tilde; + +static void *tabosc4aa_tilde_new(t_symbol *s) +{ + t_tabosc4aa_tilde *x = (t_tabosc4aa_tilde *)pd_new(tabosc4aa_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 *tabosc4aa_tilde_perform(t_int *w) +{ + t_tabosc4aa_tilde *x = (t_tabosc4aa_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 + 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]; + +#if 1 + while (n--) + { + t_sample frac, a, b, c, d, cminusb, temp, filter_out; + + temp = 0; + for (i=0;i<8;i++) + { + tf.tf_d = dphase; + dphase += *in/8 * 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; + + // 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; + +// temp = cut_filter(x, temp); +// t_sample filter_out; + + filter_out = 0.0147491 * temp + 0.0294982 * x->x_last_in + 0.0147491 * x->x_prev_in + 1.60425 * x->x_last_out - 0.663244 * x->x_prev_out; + + 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++ = filter_out; + *in++; + } +#endif + + 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 tabosc4aa_tilde_set(t_tabosc4aa_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, "tabosc4aa~: %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 tabosc4aa~", 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 tabosc4aa_tilde_ft1(t_tabosc4aa_tilde *x, t_float f) +{ + x->x_phase = f; +} + +static void tabosc4aa_tilde_dsp(t_tabosc4aa_tilde *x, t_signal **sp) +{ + x->x_conv = 1. / sp[0]->s_sr; + tabosc4aa_tilde_set(x, x->x_arrayname); + + dsp_add(tabosc4aa_tilde_perform, 4, x, + sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n); +} + +void tabosc4aa_tilde_setup(void) +{ + tabosc4aa_tilde_class = class_new(gensym("tabosc4aa~"), + (t_newmethod)tabosc4aa_tilde_new, 0, + sizeof(t_tabosc4aa_tilde), 0, A_DEFSYM, 0); + CLASS_MAINSIGNALIN(tabosc4aa_tilde_class, t_tabosc4aa_tilde, x_f); + class_addmethod(tabosc4aa_tilde_class, (t_method)tabosc4aa_tilde_dsp, + gensym("dsp"), 0); + class_addmethod(tabosc4aa_tilde_class, (t_method)tabosc4aa_tilde_set, + gensym("set"), A_SYMBOL, 0); + class_addmethod(tabosc4aa_tilde_class, (t_method)tabosc4aa_tilde_ft1, + gensym("ft1"), A_FLOAT, 0); +} + |