526b5580da
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21070 a1c6a512-1295-4272-9138-f99709370657
133 lines
3.3 KiB
C
133 lines
3.3 KiB
C
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#define FIXEDPOINT
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#include <m_pd.h>
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#include <m_fixed.h>
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static t_class *tabplay_tilde_class;
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typedef struct _tabplay_tilde
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{
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t_object x_obj;
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t_outlet *x_bangout;
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int x_phase;
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int x_nsampsintab;
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int x_limit;
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t_sample *x_vec;
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t_symbol *x_arrayname;
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t_clock *x_clock;
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} t_tabplay_tilde;
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static void tabplay_tilde_tick(t_tabplay_tilde *x);
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static void *tabplay_tilde_new(t_symbol *s)
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{
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t_tabplay_tilde *x = (t_tabplay_tilde *)pd_new(tabplay_tilde_class);
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x->x_clock = clock_new(x, (t_method)tabplay_tilde_tick);
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x->x_phase = 0x7fffffff;
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x->x_limit = 0;
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x->x_arrayname = s;
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outlet_new(&x->x_obj, &s_signal);
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x->x_bangout = outlet_new(&x->x_obj, &s_bang);
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return (x);
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}
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static t_int *tabplay_tilde_perform(t_int *w)
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{
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t_tabplay_tilde *x = (t_tabplay_tilde *)(w[1]);
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t_sample *out = (t_sample *)(w[2]), *fp;
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int n = (int)(w[3]), phase = x->x_phase,
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endphase = (x->x_nsampsintab < x->x_limit ?
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x->x_nsampsintab : x->x_limit), nxfer, n3;
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if (!x->x_vec || phase >= endphase)
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goto zero;
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nxfer = endphase - phase;
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fp = x->x_vec + phase;
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if (nxfer > n)
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nxfer = n;
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n3 = n - nxfer;
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phase += nxfer;
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while (nxfer--)
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*out++ = *fp++;
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if (phase >= endphase)
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{
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clock_delay(x->x_clock, 0);
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x->x_phase = 0x7fffffff;
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while (n3--)
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*out++ = 0;
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}
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else x->x_phase = phase;
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return (w+4);
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zero:
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while (n--) *out++ = 0;
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return (w+4);
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}
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void tabplay_tilde_set(t_tabplay_tilde *x, t_symbol *s)
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{
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t_garray *a;
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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) pd_error(x, "tabplay~: %s: no such array",
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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, &x->x_nsampsintab, &x->x_vec))
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{
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error("%s: bad template for tabplay~", x->x_arrayname->s_name);
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x->x_vec = 0;
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}
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else garray_usedindsp(a);
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}
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static void tabplay_tilde_dsp(t_tabplay_tilde *x, t_signal **sp)
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{
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tabplay_tilde_set(x, x->x_arrayname);
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dsp_add(tabplay_tilde_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
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}
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static void tabplay_tilde_list(t_tabplay_tilde *x, t_symbol *s,
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int argc, t_atom *argv)
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{
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long start = atom_getfloatarg(0, argc, argv);
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long length = atom_getfloatarg(1, argc, argv);
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if (start < 0) start = 0;
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if (length <= 0)
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x->x_limit = 0x7fffffff;
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else
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x->x_limit = start + length;
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x->x_phase = start;
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}
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static void tabplay_tilde_stop(t_tabplay_tilde *x)
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{
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x->x_phase = 0x7fffffff;
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}
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static void tabplay_tilde_tick(t_tabplay_tilde *x)
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{
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outlet_bang(x->x_bangout);
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}
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static void tabplay_tilde_free(t_tabplay_tilde *x)
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{
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clock_free(x->x_clock);
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}
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void tabplay_tilde_setup(void)
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{
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tabplay_tilde_class = class_new(gensym("tabplay~"),
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(t_newmethod)tabplay_tilde_new, (t_method)tabplay_tilde_free,
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sizeof(t_tabplay_tilde), 0, A_DEFSYM, 0);
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class_addmethod(tabplay_tilde_class, (t_method)tabplay_tilde_dsp,
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gensym("dsp"), 0);
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class_addmethod(tabplay_tilde_class, (t_method)tabplay_tilde_stop,
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gensym("stop"), 0);
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class_addmethod(tabplay_tilde_class, (t_method)tabplay_tilde_set,
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gensym("set"), A_DEFSYM, 0);
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class_addlist(tabplay_tilde_class, tabplay_tilde_list);
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}
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