0d4560cb03
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21626 a1c6a512-1295-4272-9138-f99709370657
113 lines
3 KiB
C
113 lines
3 KiB
C
#ifdef ROCKBOX
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#include "plugin.h"
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#include "pdbox.h"
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#endif
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#include <m_pd.h>
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#include <m_fixed.h>
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extern int ugen_getsortno(void);
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#include "delay.h"
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#define DEFDELVS 64 /* LATER get this from canvas at DSP time */
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#ifndef ROCKBOX
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static int delread_zero = 0; /* four bytes of zero for delread~, vd~ */
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#endif
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static t_class *sigdelread_class;
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typedef struct _sigdelread
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{
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t_object x_obj;
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t_symbol *x_sym;
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t_float x_deltime; /* delay in msec */
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int x_delsamps; /* delay in samples */
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t_float x_sr; /* samples per msec */
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t_float x_n; /* vector size */
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int x_zerodel; /* 0 or vecsize depending on read/write order */
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} t_sigdelread;
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static void sigdelread_float(t_sigdelread *x, t_float f);
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static void *sigdelread_new(t_symbol *s, t_floatarg f)
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{
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t_sigdelread *x = (t_sigdelread *)pd_new(sigdelread_class);
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x->x_sym = s;
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x->x_sr = 1;
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x->x_n = 1;
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x->x_zerodel = 0;
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sigdelread_float(x, f);
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outlet_new(&x->x_obj, &s_signal);
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return (x);
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}
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static void sigdelread_float(t_sigdelread *x, t_float f)
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{
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#ifndef ROCKBOX
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int samps;
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#endif
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t_sigdelwrite *delwriter =
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(t_sigdelwrite *)pd_findbyclass(x->x_sym, sigdelwrite_class);
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x->x_deltime = f;
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if (delwriter)
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{
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#ifndef ROCKBOX
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int delsize = delwriter->x_cspace.c_n;
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#endif
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x->x_delsamps = (int)(0.5 + x->x_sr * x->x_deltime)
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+ x->x_n - x->x_zerodel;
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if (x->x_delsamps < x->x_n) x->x_delsamps = x->x_n;
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else if (x->x_delsamps > delwriter->x_cspace.c_n - DEFDELVS)
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x->x_delsamps = delwriter->x_cspace.c_n - DEFDELVS;
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}
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}
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static t_int *sigdelread_perform(t_int *w)
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{
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t_sample *out = (t_sample *)(w[1]);
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t_delwritectl *c = (t_delwritectl *)(w[2]);
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int delsamps = *(int *)(w[3]);
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int n = (int)(w[4]);
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int phase = c->c_phase - delsamps, nsamps = c->c_n;
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t_sample *vp = c->c_vec, *bp, *ep = vp + (c->c_n + XTRASAMPS);
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if (phase < 0) phase += nsamps;
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bp = vp + phase;
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while (n--)
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{
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*out++ = *bp++;
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if (bp == ep) bp -= nsamps;
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}
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return (w+5);
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}
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static void sigdelread_dsp(t_sigdelread *x, t_signal **sp)
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{
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t_sigdelwrite *delwriter =
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(t_sigdelwrite *)pd_findbyclass(x->x_sym, sigdelwrite_class);
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x->x_sr = sp[0]->s_sr * 0.001;
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x->x_n = sp[0]->s_n;
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if (delwriter)
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{
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sigdelwrite_checkvecsize(delwriter, sp[0]->s_n);
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x->x_zerodel = (delwriter->x_sortno == ugen_getsortno() ?
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0 : delwriter->x_vecsize);
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sigdelread_float(x, x->x_deltime);
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dsp_add(sigdelread_perform, 4,
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sp[0]->s_vec, &delwriter->x_cspace, &x->x_delsamps, sp[0]->s_n);
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}
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else if (*x->x_sym->s_name)
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error("delread~: %s: no such delwrite~",x->x_sym->s_name);
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}
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void delread_tilde_setup(void)
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{
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sigdelread_class = class_new(gensym("delread~"),
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(t_newmethod)sigdelread_new, 0,
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sizeof(t_sigdelread), 0, A_DEFSYM, A_DEFFLOAT, 0);
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class_addmethod(sigdelread_class, (t_method)sigdelread_dsp,
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gensym("dsp"), 0);
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class_addfloat(sigdelread_class, (t_method)sigdelread_float);
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}
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