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/*
* Pure Data Packet module.
* Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
example object definitions:
; stack: (mix_float in_packet state_packet)
(motion-blur
((in 1) (feedback 0))
((out 0))
(ip ip 0.0)
(dup down mix dup down down))
; stack: (ouput_packet packet_type)
(noise-gen
((bang -1) (type 1))
((out 0))
(image/YCrCb/320x240 ip)
(dup noise))
; constraints:
; if a processor accepts more than one atom message (float, list, pdp)
; of the same type they MUST be remapped to other inlets
(pd-mappings
(motion-blur ((in 0) (feedback 1) (out 0)))
(noise ((out 0))))
*/
#include "pdp.h"
#include "pdp_forth.h"
#define MAXINLETS 4
/* this object instantiates a forth processor */
typedef struct pdp_forthproc_struct
{
t_object x_obj;
t_pdp_list *x_processor; // the processor definition
t_pdp_list *x_passive_stack; // we're still into thread processing
t_pdp_list *x_stack;
t_pdp_list *x_program;
} t_pdp_forthproc;
static int _check_portlist(t_pdp_list *l)
{
t_pdp_atom *a;
post ("number of ports = %d", l->elements);
for (a = l->first; a; a=a->next){
t_pdp_atom *b;
if (a->t != a_list) goto error;
if (a->w.w_list->elements != 2) goto error;
b = a->w.w_list->first;
if ((b->t != a_symbol) && (b->t != a_int)) goto error;
b = b->next;
if (b->t != a_int) goto error;
}
post ("port mappings:");
for (a = l->first; a; a=a->next) pdp_list_print(a->w.w_list);
return 1;
error:
return 0;
}
static int _check_processor(t_pdp_list *p)
{
t_pdp_atom *a;
t_pdp_list *l;
post ("list elements = %d", p->elements);
if (p->elements != 4) goto error;
for (a=p->first; a; a=a->next) if (a->t != a_list) goto error;
post ("all elements are lists: OK");
a = p->first;
post ("checking inlets");
if (!_check_portlist(a->w.w_list)) goto error;
a = a->next;
post ("checking outlets");
if (!_check_portlist(a->w.w_list)) goto error;
a = a->next; post ("init program:"); pdp_list_print(a->w.w_list);
a = a->next; post ("loop program:"); pdp_list_print(a->w.w_list);
return 1;
error:
post("not a valid processor");
return 0;
}
/* this function maps an input symbol to a type (how to interpret the
anything message) and a stack index */
static inline void pdp_forthproc_map_symbol(t_pdp_forthproc *x, t_symbol *s,
t_pdp_word_type *t, int *i)
{
}
/* this function stores a new item in an index on the stack
and executes the forth process if this is an active location */
static inline void pdp_forthproc_write_stack(t_pdp_forthproc *x, int i, t_pdp_word w)
{
}
static void pdp_forthproc_anything(t_pdp_forthproc *x, t_symbol *s, int argc, t_atom *argv)
{
/* if the symbol's length is one character, it's a remapped input.
this instance contains a mapping from symbol->(type, stack entry) */
t_pdp_word_type type = a_undef;
t_pdp_word word = (t_pdp_word)0;
int index = -1;
/* determine what we got and where we need to put it */
pdp_forthproc_map_symbol(x, s, &type, &index);
/* interprete the anything message according to expected type.
and put the result in w */
/* TODO: put pd list <-> pdp list code in core (also in pdp_guile) */
switch(type){
case a_float:
case a_int:
case a_symbol:
case a_list:
case a_packet:
default:
post("got %s, and dunno what to do with it", s->s_name);
return;
}
/* write the word to the stack
and run the word if this was an active location */
pdp_forthproc_write_stack(x, index, word);
}
static void pdp_forthproc_free(t_pdp_forthproc *x)
{
pdp_tree_strip_packets(x->x_stack);
pdp_tree_free(x->x_stack);
}
t_class *pdp_forthproc_class;
void *pdp_forthproc_new(t_symbol *s)
{
t_pdp_forthproc *x;
/* get processor */
t_pdp_symbol *procname = pdp_gensym(s->s_name);
if (!procname->s_processor) return 0;
/* allocate */
x = (t_pdp_forthproc *)pd_new(pdp_forthproc_class);
x->x_processor = procname->s_processor;
post("pdp_forthproc %s", s->s_name);
pdp_list_print(x->x_processor);
if (_check_processor(x->x_processor)) post ("processor OK");
/* create state stack */
x->x_stack = pdp_stack_new();
x->x_passive_stack = pdp_stack_new();
pdp_forth_execute_def(x->x_stack, x->x_processor->first->next->next->w.w_list);
pdp_forth_execute_def(x->x_passive_stack, x->x_processor->first->next->next->w.w_list);
post("initial stack:");
pdp_list_print(x->x_stack);
/* create inlets from description */
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_bang, gensym("A"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_bang, gensym("B"));
return (void *)x;
}
#ifdef __cplusplus
extern "C"
{
#endif
void pdp_forthproc_setup(void)
{
int i;
char iname[] = "i1";
char def[] = "(((0 1) (1 0)) ((0 0)) (ip ip 0.0) (dup down mix dup down down))";
/* create a test processor */
pdp_gensym("testproc")->s_processor = pdp_forth_compile_def(def);
/* create a standard pd class */
pdp_forthproc_class = class_new(gensym("pdp_forthproc"), (t_newmethod)pdp_forthproc_new,
(t_method)pdp_forthproc_free, sizeof(t_pdp_forthproc), 0, A_SYMBOL, A_NULL);
/* add global message handler */
class_addanything(pdp_forthproc_class, (t_method)pdp_forthproc_anything);
}
#ifdef __cplusplus
}
#endif
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