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

   1 #ifdef ROCKBOX
   2 #include "plugin.h"
   3 #include "../../pdbox.h"
   4 #endif
   5
   6 #include "../src/m_pd.h"
   7 #include <../src/m_fixed.h>
   8
   9 extern int ugen_getsortno(void);
  10
  11 #include "delay.h"
  12
  13 #define DEFDELVS 64             /* LATER get this from canvas at DSP time */
  14 #ifndef ROCKBOX
  15 static int delread_zero = 0;    /* four bytes of zero for delread~, vd~ */
  16 #endif
  17
  18 static t_class *sigdelread_class;
  19
  20 typedef struct _sigdelread
  21 {
  22     t_object x_obj;
  23     t_symbol *x_sym;
  24     t_float x_deltime;  /* delay in msec */
  25     int x_delsamps;     /* delay in samples */
  26     t_float x_sr;       /* samples per msec */
  27     t_float x_n;        /* vector size */
  28     int x_zerodel;      /* 0 or vecsize depending on read/write order */
  29 } t_sigdelread;
  30
  31 static void sigdelread_float(t_sigdelread *x, t_float f);
  32
  33 static void *sigdelread_new(t_symbol *s, t_floatarg f)
  34 {
  35     t_sigdelread *x = (t_sigdelread *)pd_new(sigdelread_class);
  36     x->x_sym = s;
  37     x->x_sr = 1;
  38     x->x_n = 1;
  39     x->x_zerodel = 0;
  40     sigdelread_float(x, f);
  41     outlet_new(&x->x_obj, &s_signal);
  42     return (x);
  43 }
  44
  45 static void sigdelread_float(t_sigdelread *x, t_float f)
  46 {
  47 #ifndef ROCKBOX
  48     int samps;
  49 #endif
  50     t_sigdelwrite *delwriter =
  51         (t_sigdelwrite *)pd_findbyclass(x->x_sym, sigdelwrite_class);
  52     x->x_deltime = f;
  53     if (delwriter)
  54     {
  55 #ifndef ROCKBOX
  56         int delsize = delwriter->x_cspace.c_n;
  57 #endif
  58         x->x_delsamps = (int)(0.5 + x->x_sr * x->x_deltime)
  59             + x->x_n - x->x_zerodel;
  60         if (x->x_delsamps < x->x_n) x->x_delsamps = x->x_n;
  61         else if (x->x_delsamps > delwriter->x_cspace.c_n - DEFDELVS)
  62             x->x_delsamps = delwriter->x_cspace.c_n - DEFDELVS;
  63     }
  64 }
  65
  66 static t_int *sigdelread_perform(t_int *w)
  67 {
  68     t_sample *out = (t_sample *)(w[1]);
  69     t_delwritectl *c = (t_delwritectl *)(w[2]);
  70     int delsamps = *(int *)(w[3]);
  71     int n = (int)(w[4]);
  72     int phase = c->c_phase - delsamps, nsamps = c->c_n;
  73     t_sample *vp = c->c_vec, *bp, *ep = vp + (c->c_n + XTRASAMPS);
  74
  75     if (phase < 0) phase += nsamps;
  76     bp = vp + phase;
  77     while (n--)
  78     {
  79         *out++ = *bp++;
  80         if (bp == ep) bp -= nsamps;
  81     }
  82     return (w+5);
  83 }
  84
  85 static void sigdelread_dsp(t_sigdelread *x, t_signal **sp)
  86 {
  87     t_sigdelwrite *delwriter =
  88         (t_sigdelwrite *)pd_findbyclass(x->x_sym, sigdelwrite_class);
  89     x->x_sr = sp[0]->s_sr * 0.001;
  90     x->x_n = sp[0]->s_n;
  91     if (delwriter)
  92     {
  93         sigdelwrite_checkvecsize(delwriter, sp[0]->s_n);
  94         x->x_zerodel = (delwriter->x_sortno == ugen_getsortno() ?
  95             0 : delwriter->x_vecsize);
  96         sigdelread_float(x, x->x_deltime);
  97         dsp_add(sigdelread_perform, 4,
  98             sp[0]->s_vec, &delwriter->x_cspace, &x->x_delsamps, sp[0]->s_n);
  99     }
 100     else if (*x->x_sym->s_name)
 101         error("delread~: %s: no such delwrite~",x->x_sym->s_name);
 102 }
 103
 104 void delread_tilde_setup(void)
 105 {
 106     sigdelread_class = class_new(gensym("delread~"),
 107         (t_newmethod)sigdelread_new, 0,
 108         sizeof(t_sigdelread), 0, A_DEFSYM, A_DEFFLOAT, 0);
 109     class_addmethod(sigdelread_class, (t_method)sigdelread_dsp,
 110         gensym("dsp"), 0);
 111     class_addfloat(sigdelread_class, (t_method)sigdelread_float);
 112 }
 113