/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */

/*  The dac~ and adc~ routines.
*/

#include "m_pd.h"
#include "s_stuff.h"

/* ----------------------------- dac~ --------------------------- */
static t_class *dac_class;

typedef struct _dac
{
    t_object x_obj;
    t_int x_n;
    t_int *x_vec;
    t_float x_f;
} t_dac;

static void *dac_new(t_symbol *s, int argc, t_atom *argv)
{
    t_dac *x = (t_dac *)pd_new(dac_class);
    t_atom defarg[2], *ap;
    int i;
    if (!argc)
    {
        argv = defarg;
        argc = 2;
        SETFLOAT(&defarg[0], 1);
        SETFLOAT(&defarg[1], 2);
    }
    x->x_n = argc;
    x->x_vec = (t_int *)getbytes(argc * sizeof(*x->x_vec));
    for (i = 0; i < argc; i++)
        x->x_vec[i] = atom_getintarg(i, argc, argv);
    for (i = 1; i < argc; i++)
        inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
    x->x_f = 0;
    return (x);
}

static void dac_dsp(t_dac *x, t_signal **sp)
{
    t_int i, *ip;
    t_signal **sp2;
    for (i = x->x_n, ip = x->x_vec, sp2 = sp; i--; ip++, sp2++)
    {
        int ch = *ip - 1;
        if ((*sp2)->s_n != DEFDACBLKSIZE)
            error("dac~: bad vector size");
        else if (ch >= 0 && ch < sys_get_outchannels())
            dsp_add(plus_perform, 4, sys_soundout + DEFDACBLKSIZE*ch,
                (*sp2)->s_vec, sys_soundout + DEFDACBLKSIZE*ch, DEFDACBLKSIZE);
    }    
}

static void dac_free(t_dac *x)
{
    freebytes(x->x_vec, x->x_n * sizeof(*x->x_vec));
}

void dac_tilde_setup(void)
{
    dac_class = class_new(gensym("dac~"), (t_newmethod)dac_new,
        (t_method)dac_free, sizeof(t_dac), 0, A_GIMME, 0);
    CLASS_MAINSIGNALIN(dac_class, t_dac, x_f);
    class_addmethod(dac_class, (t_method)dac_dsp, gensym("dsp"), A_CANT, 0);
    class_sethelpsymbol(dac_class, gensym("adc~_dac~"));
}