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/* copyleft (c) 2003 forum::für::umläute -- IOhannes m zmölnig @ IEM
* based on d_array.c from pd:
* Copyright (c) 1997-1999 Miller Puckette and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* tab16write~, tab16play~, tab16read~, tab16read4~, tab16send~, tab16receive~ */
#include "iem16_table.h"
/* ------------ tab16play~ - non-transposing sample playback --------------- */
static t_class *tab16play_tilde_class;
typedef struct _tab16play_tilde{
t_object x_obj;
t_outlet *x_bangout;
int x_phase;
int x_nsampsintab;
int x_limit;
t_iem16_16bit *x_vec;
t_symbol *x_arrayname;
} t_tab16play_tilde;
static void *tab16play_tilde_new(t_symbol *s){
t_tab16play_tilde *x = (t_tab16play_tilde *)pd_new(tab16play_tilde_class);
x->x_phase = 0x7fffffff;
x->x_limit = 0;
x->x_arrayname = s;
outlet_new(&x->x_obj, gensym("signal"));
x->x_bangout = outlet_new(&x->x_obj, gensym("bang"));
return (x);
}
static t_int *tab16play_tilde_perform(t_int *w){
t_tab16play_tilde *x = (t_tab16play_tilde *)(w[1]);
t_float *out = (t_float *)(w[2]);
t_iem16_16bit *fp;
int n = (int)(w[3]), phase = x->x_phase,
endphase = (x->x_nsampsintab < x->x_limit ?
x->x_nsampsintab : x->x_limit), nxfer, n3;
if (!x->x_vec || phase >= endphase) goto zero;
nxfer = endphase - phase;
fp = x->x_vec + phase;
if (nxfer > n)
nxfer = n;
n3 = n - nxfer;
phase += nxfer;
while (nxfer--) *out++ = *fp++*IEM16_SCALE_DOWN;
if (phase >= endphase) {
x->x_phase = 0x7fffffff;
while (n3--) *out++ = 0;
}
else x->x_phase = phase;
return (w+4);
zero:
while (n--) *out++ = 0;
return (w+4);
}
void tab16play_tilde_set(t_tab16play_tilde *x, t_symbol *s){
t_table16 *a;
x->x_arrayname = s;
if (!(a = (t_table16 *)pd_findbyclass(x->x_arrayname, table16_class))) {
if (*s->s_name) pd_error(x, "tab16play~: %s: no such array",
x->x_arrayname->s_name);
x->x_vec = 0;
}
else if (!table16_getarray16(a, &x->x_nsampsintab, &x->x_vec)) {
error("%s: bad template for tab16play~", x->x_arrayname->s_name);
x->x_vec = 0;
}
else table16_usedindsp(a);
}
static void tab16play_tilde_dsp(t_tab16play_tilde *x, t_signal **sp){
tab16play_tilde_set(x, x->x_arrayname);
dsp_add(tab16play_tilde_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
}
static void tab16play_tilde_list(t_tab16play_tilde *x, t_symbol *s,
int argc, t_atom *argv){
long start = atom_getfloatarg(0, argc, argv);
long length = atom_getfloatarg(1, argc, argv);
if (start < 0) start = 0;
if (length <= 0)x->x_limit = 0x7fffffff;
else x->x_limit = start + length;
x->x_phase = start;
}
static void tab16play_tilde_stop(t_tab16play_tilde *x){
x->x_phase = 0x7fffffff;
}
static void tab16play_tilde_free(t_tab16play_tilde *x){}
void tab16play_tilde_setup(void){
tab16play_tilde_class = class_new(gensym("tab16play~"),
(t_newmethod)tab16play_tilde_new, (t_method)tab16play_tilde_free,
sizeof(t_tab16play_tilde), 0, A_DEFSYM, 0);
class_addmethod(tab16play_tilde_class, (t_method)tab16play_tilde_dsp,
gensym("dsp"), 0);
class_addmethod(tab16play_tilde_class, (t_method)tab16play_tilde_stop,
gensym("stop"), 0);
class_addmethod(tab16play_tilde_class, (t_method)tab16play_tilde_set,
gensym("set"), A_DEFSYM, 0);
class_addlist(tab16play_tilde_class, tab16play_tilde_list);
}
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