File: dinlet~.c

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/*
Copyright (C) 2002 Antoine Rousseau

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

/* this file is made from parts of m_object.c and g_io.c
* 	it defines a signal inlet named dinlet~ which is the same as inlet~
*  exepts you can give a default float value for the case none signal
*  is connected to this inlet~. */

/***********************************************************************/
#include "m_pd.h"
#include "m_imp.h"
#include "g_canvas.h"
#include <string.h>

/******************** from m_obj.c: **************************/
/* only because inlet_float() is not public... */
union inletunion
{
    t_symbol *iu_symto;
    t_gpointer *iu_pointerslot;
    t_float *iu_floatslot;
    t_symbol **iu_symslot;
    t_sample iu_floatsignalvalue;
};

struct _inlet
{
    t_pd i_pd;
    struct _inlet *i_next;
    t_object *i_owner;
    t_pd *i_dest;
    t_symbol *i_symfrom;
    union inletunion i_un;
};

#define i_symto i_un.iu_symto

static void dinlet_float(t_inlet *x, t_float f)
{
    if (x->i_symfrom == &s_float)
        pd_vmess(x->i_dest, x->i_symto, "f", (t_floatarg)f);
    else if (x->i_symfrom == &s_signal)
        x->i_un.iu_floatsignalvalue = f;
    else if (!x->i_symfrom)
        pd_float(x->i_dest, f);
    /*else inlet_wrong(x, &s_float);*/
}
/**************** from g_io.c : *********************************/

void signal_setborrowed(t_signal *sig, t_signal *sig2);
void signal_makereusable(t_signal *sig);

/* ------------------------- vinlet -------------------------- */
t_class *vinlet_class;

typedef struct _vinlet
{
    t_object x_obj;
    t_canvas *x_canvas;
    t_inlet *x_inlet;
    int x_bufsize;
    t_float *x_buf; 	    /* signal buffer; zero if not a signal */
    t_float *x_endbuf;
    t_float *x_fill;
    t_float *x_read;
    int x_hop;
    /* if not reblocking, the next slot communicates the parent's inlet
    signal from the prolog to the DSP routine: */
    t_signal *x_directsignal;
} t_vinlet;


static void *dinlet_newsig(t_floatarg f)
{
    t_vinlet *x = (t_vinlet *)pd_new(vinlet_class);
    x->x_canvas = canvas_getcurrent();
    x->x_inlet = canvas_addinlet(x->x_canvas, &x->x_obj.ob_pd, &s_signal);
    x->x_endbuf = x->x_buf = (t_float *)getbytes(0);
    x->x_bufsize = 0;
    x->x_directsignal = 0;
    x->x_inlet->i_un.iu_floatsignalvalue=f;
    outlet_new(&x->x_obj, &s_signal);
    return (x);
}

void dinlet_tilde_setup(void)
{
    class_addcreator((t_newmethod)dinlet_newsig, gensym("dinlet~"), A_DEFFLOAT,0);
}