apps/plugins/pdbox/PDa/intern/tabread4~.c

   1
   2 #include "../src/m_pd.h"
   3 #include <../src/m_fixed.h>
   4
   5
   6 static t_class *tabread4_tilde_class;
   7
   8 typedef struct _tabread4_tilde
   9 {
  10     t_object x_obj;
  11     int x_npoints;
  12     t_sample *x_vec;
  13     t_symbol *x_arrayname;
  14     float x_f;
  15 } t_tabread4_tilde;
  16
  17 static void *tabread4_tilde_new(t_symbol *s)
  18 {
  19     t_tabread4_tilde *x = (t_tabread4_tilde *)pd_new(tabread4_tilde_class);
  20     x->x_arrayname = s;
  21     x->x_vec = 0;
  22     outlet_new(&x->x_obj, gensym("signal"));
  23     x->x_f = 0;
  24     return (x);
  25 }
  26
  27 static t_int *tabread4_tilde_perform(t_int *w)
  28 {
  29     t_tabread4_tilde *x = (t_tabread4_tilde *)(w[1]);
  30     t_sample *in = (t_sample *)(w[2]);
  31     t_sample *out = (t_sample *)(w[3]);
  32     int n = (int)(w[4]);
  33     int maxindex;
  34     t_sample *buf = x->x_vec, *fp;
  35     int i;
  36
  37     maxindex = x->x_npoints - 3;
  38
  39     if (!buf) goto zero;
  40
  41     for (i = 0; i < n; i++)
  42     {
  43         t_time findex =  ((long long) mult((*in++),ftofix(44.1)));
  44         int index = fixtoi(findex);
  45         t_sample frac;
  46         //      post("%d: index %d f %lld",index,findex,*in);
  47
  48         if (index < 1)
  49             index = 1, frac = 0;
  50         else if (index > maxindex)
  51             index = maxindex, frac = 1;
  52         else frac = findex - itofix(index);
  53         fp = buf + index;
  54         *out++ = fp[0] + mult(frac,fp[1]-fp[0]);
  55     }
  56     return (w+5);
  57  zero:
  58     while (n--) *out++ = 0;
  59
  60     return (w+5);
  61 }
  62
  63 void tabread4_tilde_set(t_tabread4_tilde *x, t_symbol *s)
  64 {
  65     t_garray *a;
  66
  67     x->x_arrayname = s;
  68     if (!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
  69     {
  70         if (*s->s_name)
  71             error("tabread4~: %s: no such array", x->x_arrayname->s_name);
  72         x->x_vec = 0;
  73     }
  74     else if (!garray_getfloatarray(a, &x->x_npoints, &x->x_vec))
  75     {
  76         error("%s: bad template for tabread4~", x->x_arrayname->s_name);
  77         x->x_vec = 0;
  78     }
  79     else garray_usedindsp(a);
  80 }
  81
  82 static void tabread4_tilde_dsp(t_tabread4_tilde *x, t_signal **sp)
  83 {
  84     tabread4_tilde_set(x, x->x_arrayname);
  85
  86     dsp_add(tabread4_tilde_perform, 4, x,
  87         sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
  88
  89 }
  90
  91 static void tabread4_tilde_free(t_tabread4_tilde *x)
  92 {
  93 #ifdef ROCKBOX
  94     (void) x;
  95 #endif
  96 }
  97
  98 void tabread4_tilde_setup(void)
  99 {
 100     tabread4_tilde_class = class_new(gensym("tabread4~"),
 101         (t_newmethod)tabread4_tilde_new, (t_method)tabread4_tilde_free,
 102         sizeof(t_tabread4_tilde), 0, A_DEFSYM, 0);
 103     CLASS_MAINSIGNALIN(tabread4_tilde_class, t_tabread4_tilde, x_f);
 104     class_addmethod(tabread4_tilde_class, (t_method)tabread4_tilde_dsp,
 105         gensym("dsp"), 0);
 106     class_addmethod(tabread4_tilde_class, (t_method)tabread4_tilde_set,
 107         gensym("set"), A_SYMBOL, 0);
 108 }
 109