0d4560cb03
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21626 a1c6a512-1295-4272-9138-f99709370657
139 lines
3.3 KiB
C
139 lines
3.3 KiB
C
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#include <m_pd.h>
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#include <m_fixed.h>
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static t_class *tabosc4_tilde_class;
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typedef struct _tabosc4_tilde
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{
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t_object x_obj;
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int x_fnpoints;
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int x_lognpoints;
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t_sample *x_vec;
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t_symbol *x_arrayname;
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t_sample x_f;
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unsigned int x_phase;
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t_sample x_conv;
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} t_tabosc4_tilde;
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static void *tabosc4_tilde_new(t_symbol *s)
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{
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t_tabosc4_tilde *x = (t_tabosc4_tilde *)pd_new(tabosc4_tilde_class);
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x->x_arrayname = s;
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x->x_vec = 0;
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x->x_fnpoints = 512;
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outlet_new(&x->x_obj, gensym("signal"));
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inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
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x->x_f = 0;
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post("new done");
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return (x);
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}
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static t_int *tabosc4_tilde_perform(t_int *w)
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{
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t_tabosc4_tilde *x = (t_tabosc4_tilde *)(w[1]);
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t_sample *in = (t_sample *)(w[2]);
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t_sample *out = (t_sample *)(w[3]);
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int n = (int)(w[4]);
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t_sample *tab = x->x_vec;
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unsigned int phase = x->x_phase;
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int conv = x->x_conv;
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int off;
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int frac;
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int logp = x->x_lognpoints;
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if (!tab) goto zero;
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while (n--) {
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t_sample f2;
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phase+= mult(conv ,(*in++));
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phase &= (itofix(1) -1);
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off = fixtoi((long long)phase<<logp);
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#ifdef NO_INTERPOLATION
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*out = *(tab+off);
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#else
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frac = phase & ((1<<logp)-1);
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frac <<= (fix1-logp);
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f2 = (off == x->x_fnpoints) ?
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mult(*(tab),frac) :
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mult(*(tab + off + 1),frac);
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*out = mult(*(tab + off),(itofix(1) - frac)) + f2;
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#endif
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out++;
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}
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x->x_phase = phase;
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return (w+5);
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zero:
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while (n--) *out++ = 0;
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return (w+5);
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}
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void tabosc4_tilde_set(t_tabosc4_tilde *x, t_symbol *s)
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{
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t_garray *a;
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#ifdef ROCKBOX
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int pointsinarray;
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#else
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int npoints, pointsinarray;
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#endif
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x->x_arrayname = s;
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if (!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
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{
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if (*s->s_name)
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pd_error(x, "tabosc4~: %s: no such array", x->x_arrayname->s_name);
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x->x_vec = 0;
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}
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else if (!garray_getfloatarray(a, &pointsinarray, &x->x_vec))
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{
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pd_error(x, "%s: bad template for tabosc4~", x->x_arrayname->s_name);
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x->x_vec = 0;
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}
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else
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{
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#ifndef ROCKBOX
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int i;
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#endif
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x->x_fnpoints = pointsinarray;
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x->x_lognpoints = ilog2(pointsinarray);
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post("tabosc~: using %d (log %d) points of array",x->x_fnpoints,x->x_lognpoints);
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garray_usedindsp(a);
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}
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}
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static void tabosc4_tilde_ft1(t_tabosc4_tilde *x, t_float f)
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{
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x->x_phase = f;
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}
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static void tabosc4_tilde_dsp(t_tabosc4_tilde *x, t_signal **sp)
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{
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x->x_conv = ftofix(1000.)/sp[0]->s_sr;
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x->x_conv = mult(x->x_conv + 500,ftofix(0.001));
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tabosc4_tilde_set(x, x->x_arrayname);
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dsp_add(tabosc4_tilde_perform, 4, x,
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sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
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}
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void tabosc4_tilde_setup(void)
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{
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tabosc4_tilde_class = class_new(gensym("tabosc4~"),
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(t_newmethod)tabosc4_tilde_new, 0,
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sizeof(t_tabosc4_tilde), 0, A_DEFSYM, 0);
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CLASS_MAINSIGNALIN(tabosc4_tilde_class, t_tabosc4_tilde, x_f);
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class_addmethod(tabosc4_tilde_class, (t_method)tabosc4_tilde_dsp,
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gensym("dsp"), 0);
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class_addmethod(tabosc4_tilde_class, (t_method)tabosc4_tilde_set,
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gensym("set"), A_SYMBOL, 0);
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class_addmethod(tabosc4_tilde_class, (t_method)tabosc4_tilde_ft1,
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gensym("ft1"), A_FLOAT, 0);
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}
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