/* * jMax * Copyright (C) 1994, 1995, 1998, 1999 by IRCAM-Centre Georges Pompidou, Paris, France. * * 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. * * See file LICENSE for further informations on licensing terms. * * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Based on Max/ISPW by Miller Puckette. * * Authors: Maurizio De Cecco, Francois Dechelle, Enzo Maggi, Norbert Schnell. * */ /* "expr" was written by Shahrokh Yadegari c. 1989. -msp */ /* "expr~" and "fexpr~" conversion by Shahrokh Yadegari c. 1999,2000 */ #include #include #include "vexp.h" #ifndef MSP #ifndef MACOSX /* * the compiler on mac seems not to like this, perhaps we could get away with * not having it at all. */ #include "stdlib.h" #endif #endif #include "string.h" static char *exp_version = "0.3"; extern struct ex_ex *ex_eval(struct expr *exp, struct ex_ex *eptr, struct ex_ex *optr, int n); #ifdef PD static t_class *expr_class; static t_class *expr_tilde_class; static t_class *fexpr_tilde_class; #else /* MSP */ void *expr_tilde_class; #endif /*------------------------- expr class -------------------------------------*/ extern int expr_donew(struct expr *expr, int ac, t_atom *av); /*#define EXPR_DEBUG*/ static void expr_bang(t_expr *x); t_int *expr_perform(t_int *w); static void expr_list(t_expr *x, t_symbol *s, int argc, const fts_atom_t *argv) { int i; if (argc > MAX_VARS) argc = MAX_VARS; for (i = 0; i < argc; i++) { if (argv[i].a_type == A_FLOAT) { if (x->exp_var[i].ex_type == ET_FI) x->exp_var[i].ex_flt = argv[i].a_w.w_float; else if (x->exp_var[i].ex_type == ET_II) x->exp_var[i].ex_int = argv[i].a_w.w_float; else pd_error(x, "expr: type mismatch"); } else if (argv[i].a_type == A_SYMBOL) { if (x->exp_var[i].ex_type == ET_SI) x->exp_var[i].ex_ptr = (char *)argv[i].a_w.w_symbol; else pd_error(x, "expr: type mismatch"); } } expr_bang(x); } static void expr_flt(t_expr *x, t_float f, int in) { if (in > MAX_VARS) return; if (x->exp_var[in].ex_type == ET_FI) x->exp_var[in].ex_flt = f; else if (x->exp_var[in].ex_type == ET_II) x->exp_var[in].ex_int = f; } static t_class *exprproxy_class; typedef struct _exprproxy { t_pd p_pd; int p_index; t_expr *p_owner; struct _exprproxy *p_next; } t_exprproxy; t_exprproxy *exprproxy_new(t_expr *owner, int indx); void exprproxy_float(t_exprproxy *p, t_floatarg f); t_exprproxy * exprproxy_new(t_expr *owner, int indx) { t_exprproxy *x = (t_exprproxy *)pd_new(exprproxy_class); x->p_owner = owner; x->p_index = indx; x->p_next = owner->exp_proxy; owner->exp_proxy = x; return (x); } void exprproxy_float(t_exprproxy *p, t_floatarg f) { t_expr *x = p->p_owner; int in = p->p_index; if (in > MAX_VARS) return; if (x->exp_var[in].ex_type == ET_FI) x->exp_var[in].ex_flt = f; else if (x->exp_var[in].ex_type == ET_II) x->exp_var[in].ex_int = f; } /* method definitions */ static void expr_ff(t_expr *x) { t_exprproxy *y; y = x->exp_proxy; while (y) { x->exp_proxy = y->p_next; #ifdef PD pd_free(&y->p_pd); #else /*MSP */ /* SDY find out what needs to be called for MSP */ #endif y = x->exp_proxy; } if (x->exp_stack) fts_free(x->exp_stack); /* * SDY free all the allocated buffers here for expr~ and fexpr~ */ } static void expr_bang(t_expr *x) { #ifdef EXPR_DEBUG { int i; struct ex_ex *eptr; for (i = 0, eptr = x->exp_var; ; eptr++, i++) { if (!eptr->ex_type) break; switch (eptr->ex_type) { case ET_II: fprintf(stderr,"ET_II: %d \n", eptr->ex_int); break; case ET_FI: fprintf(stderr,"ET_FT: %f \n", eptr->ex_flt); break; default: fprintf(stderr,"oups\n"); } } } #endif /* banging a signal or filter object means nothing */ if (!IS_EXPR(x)) return; if (!ex_eval(x, x->exp_stack, &x->exp_res, 0)) { /* fprintf(stderr,"expr_bang(error evaluation)\n"); */ return; } switch(x->exp_res.ex_type) { case ET_INT: outlet_float(x->exp_outlet, (t_float) x->exp_res.ex_int); break; case ET_FLT: outlet_float(x->exp_outlet, x->exp_res.ex_flt); break; case ET_SYM: /* CHANGE this will have to be taken care of */ default: post("expr: bang: unrecognized result %ld\n", x->exp_res.ex_type); } } static t_expr * #ifdef PD expr_new(t_symbol *s, int ac, t_atom *av) #else /* MSP */ Nexpr_new(t_symbol *s, int ac, t_atom *av) #endif { struct expr *x; int i, ninlet; struct ex_ex *eptr; t_atom fakearg; int dsp_index; /* keeping track of the dsp inlets */ /* * SDY - we may need to call dsp_setup() in this function */ if (!ac) { ac = 1; av = &fakearg; SETFLOAT(&fakearg, 0); } #ifdef PD /* * figure out if we are expr, expr~, or fexpr~ */ if (!strcmp("expr", s->s_name)) { x = (t_expr *)pd_new(expr_class); SET_EXPR(x); } else if (!strcmp("expr~", s->s_name)) { x = (t_expr *)pd_new(expr_tilde_class); SET_EXPR_TILDE(x); } else if (!strcmp("fexpr~", s->s_name)) { x = (t_expr *)pd_new(fexpr_tilde_class); SET_FEXPR_TILDE(x); } else { post("expr_new: bad object name '%s'"); /* assume expr */ x = (t_expr *)pd_new(expr_class); SET_EXPR(x); } #else /* MSP */ /* for now assume an expr~ */ x = (t_expr *)pd_new(expr_tilde_class); SET_EXPR_TILDE(x); #endif /* * initialize the newly allocated object */ x->exp_stack = (struct ex_ex *)0; x->exp_proxy = 0; x->exp_nivec = 0; x->exp_error = 0; x->exp_outlet = (t_outlet *)0; x->exp_res.ex_type = 0; x->exp_res.ex_int = 0; x->exp_p_res = (t_float *)0; x->exp_tmpres = (t_float *)0; for (i = 0; i < MAX_VARS; i++) { x->exp_var[i].ex_type = 0; x->exp_var[i].ex_int = 0; x->exp_p_var[i] = (t_float *)0; } x->exp_f = 0; /* save the control value to be transformed to signal */ if (expr_donew(x, ac, av)) { pd_error(x, "expr: syntax error"); /* SDY the following coredumps why? pd_free(&x->exp_ob.ob_pd); */ return (0); } ninlet = 1; for (i = 0, eptr = x->exp_var; i < MAX_VARS ; i++, eptr++) if (eptr->ex_type) { ninlet = i + 1; } /* * create the new inlets */ for (i = 1, eptr = x->exp_var + 1, dsp_index=1; iex_type) { case 0: /* nothing is using this inlet */ if (i < ninlet) #ifdef PD floatinlet_new(&x->exp_ob, &eptr->ex_flt); #else /* MSP */ inlet_new(&x->exp_ob, "float"); #endif break; case ET_II: case ET_FI: p = exprproxy_new(x, i); #ifdef PD inlet_new(&x->exp_ob, &p->p_pd, &s_float, &s_float); #else /* MSP */ inlet_new(&x->exp_ob, "float"); #endif break; case ET_SI: #ifdef PD symbolinlet_new(&x->exp_ob, (t_symbol **)&eptr->ex_ptr); #else /* MSP */ inlet_new(&x->exp_ob, "symbol"); #endif break; case ET_XI: case ET_VI: if (!IS_EXPR(x)) { dsp_index++; #ifdef PD inlet_new(&x->exp_ob, &x->exp_ob.ob_pd, &s_signal, &s_signal); #else /* MSP */ inlet_new(&x->exp_ob, "signal"); #endif break; } else post("expr: internal error expr_new"); default: pd_error(x, "expr: bad type (%lx) inlet = %d\n", eptr->ex_type, i + 1, 0, 0, 0); break; } } if (IS_EXPR(x)) { x->exp_outlet = outlet_new(&x->exp_ob, 0); } else { #ifdef PD x->exp_outlet = outlet_new(&x->exp_ob, gensym("signal")); #else /* MSP */ x->exp_outlet = outlet_new(&x->exp_ob, "signal"); #endif x->exp_nivec = dsp_index; } return (x); } t_int * expr_perform(t_int *w) { int i; t_expr *x = (t_expr *)w[1]; struct ex_ex res; int n; /* sanity check */ if (IS_EXPR(x)) { post("expr_perform: bad x->exp_flags = %d", x->exp_flags); abort(); } if (x->exp_flags & EF_STOP) { memset(x->exp_res.ex_vec, 0, x->exp_vsize * sizeof (float)); return (w + 2); } if (IS_EXPR_TILDE(x)) { ex_eval(x, x->exp_stack, &x->exp_res, 0); return (w + 2); } if (!IS_FEXPR_TILDE(x)) { post("expr_perform: bad x->exp_flags = %d - expecting fexpr", x->exp_flags); abort(); } /* * since the output buffer could be the same as one of the inputs * we need to keep the output in a different buffer */ for (i = 0; i < x->exp_vsize; i++) { res.ex_type = 0; res.ex_int = 0; ex_eval(x, x->exp_stack, &res, i); switch (res.ex_type) { case ET_INT: x->exp_tmpres[i] = (t_float) res.ex_int; break; case ET_FLT: x->exp_tmpres[i] = res.ex_flt; break; default: post("expr_perform: bad result type %d", res.ex_type); } } /* * copy inputs and results to the save buffers * inputs need to be copied first as the output buffer can be * same as an input buffer */ n = x->exp_vsize * sizeof(t_float); for (i = 0; i < MAX_VARS; i++) if (x->exp_var[i].ex_type == ET_XI) memcpy(x->exp_p_var[i], x->exp_var[i].ex_vec, n); memcpy(x->exp_p_res, x->exp_tmpres, n); memcpy(x->exp_res.ex_vec, x->exp_tmpres, n); return (w + 2); } static void expr_dsp(t_expr *x, t_signal **sp) { int i, nv; int newsize; x->exp_error = 0; /* reset all errors */ newsize = (x->exp_vsize != sp[0]->s_n); x->exp_vsize = sp[0]->s_n; /* record the vector size */ x->exp_res.ex_type = ET_VEC; x->exp_res.ex_vec = sp[x->exp_nivec]->s_vec; for (i = 0, nv = 0; i < MAX_VARS; i++) /* * the first inlet is always a signal * * SDY We are warning the user till this limitation * is taken away from pd */ if (!i || x->exp_var[i].ex_type == ET_VI || x->exp_var[i].ex_type == ET_XI) { if (nv >= x->exp_nivec) { post("expr_dsp int. err nv = %d, x->exp_nive = %d", nv, x->exp_nivec); abort(); } x->exp_var[i].ex_vec = sp[nv]->s_vec; nv++; } /* we always have one inlet but we may not use it */ if (nv != x->exp_nivec && (nv != 0 || x->exp_nivec != 1)) { post("expr_dsp internal error 2 nv = %d, x->exp_nive = %d", nv, x->exp_nivec); abort(); } dsp_add(expr_perform, 1, (t_int *) x); if (!IS_FEXPR_TILDE(x)) return; if (x->exp_p_res) { if (!newsize) return; /* * if new size, reallocate all the previous buffers for fexpr~ */ fts_free(x->exp_p_res); fts_free(x->exp_tmpres); for (i = 0; i < MAX_VARS; i++) fts_free(x->exp_p_var[i]); } x->exp_p_res = fts_calloc(x->exp_vsize, sizeof (t_float)); x->exp_tmpres = fts_calloc(x->exp_vsize, sizeof (t_float)); for (i = 0; i < MAX_VARS; i++) x->exp_p_var[i] = fts_calloc(x->exp_vsize, sizeof (t_float)); } /* * expr_start -- turn on expr processing for now only used for fexpr~ */ static void expr_start(t_expr *x) { x->exp_flags &= ~EF_STOP; } /* * expr_stop -- turn on expr processing for now only used for fexpr~ */ static void expr_stop(t_expr *x) { x->exp_flags |= EF_STOP; } #ifdef PD void expr_setup(void) { /* * expr initialization */ expr_class = class_new(gensym("expr"), (t_newmethod)expr_new, (t_method)expr_ff, sizeof(t_expr), 0, A_GIMME, 0); class_addlist(expr_class, expr_list); exprproxy_class = class_new(gensym("exprproxy"), 0, 0, sizeof(t_exprproxy), CLASS_PD, 0); class_addfloat(exprproxy_class, exprproxy_float); /* * expr~ initialization */ expr_tilde_class = class_new(gensym("expr~"), (t_newmethod)expr_new, (t_method)expr_ff, sizeof(t_expr), 0, A_GIMME, 0); class_addmethod(expr_tilde_class, nullfn, gensym("signal"), 0); CLASS_MAINSIGNALIN(expr_tilde_class, t_expr, exp_f); class_addmethod(expr_tilde_class,(t_method)expr_dsp, gensym("dsp"), 0); /* * fexpr~ initialization */ fexpr_tilde_class = class_new(gensym("fexpr~"), (t_newmethod)expr_new, (t_method)expr_ff, sizeof(t_expr), 0, A_GIMME, 0); class_addmethod(fexpr_tilde_class, nullfn, gensym("signal"), 0); class_addmethod(fexpr_tilde_class,(t_method)expr_start, gensym("start"), 0); class_addmethod(fexpr_tilde_class,(t_method)expr_stop, gensym("stop"), 0); class_addmethod(fexpr_tilde_class,(t_method)expr_dsp,gensym("dsp"), 0); post("expr, expr~, fexpr~ version %s under GNU General Public License ", exp_version); } void expr_tilde_setup(void) { expr_setup(); } void fexpr_tilde_setup(void) { expr_setup(); } #else /* MSP */ void main(void) { setup((t_messlist **)&expr_tilde_class, (method)Nexpr_new, (method)expr_ff, (short)sizeof(t_expr), 0L, A_GIMME, 0); addmess((method)expr_dsp, "dsp", A_CANT, 0); // dsp method dsp_initclass(); } #endif /* -- the following functions use Pd internals and so are in the "if" file. */ int ex_getsym(char *p, fts_symbol_t *s) { *s = gensym(p); return (0); } const char * ex_symname(fts_symbol_t s) { return (fts_symbol_name(s)); } /* * max_ex_tab -- evaluate this table access * eptr is the name of the table and arg is the index we * have to put the result in optr * return 1 on error and 0 otherwise * * Arguments: * the expr object * table * the argument * the result pointer */ int max_ex_tab(struct expr *exp,fts_symbol_t s,struct ex_ex *arg,struct ex_ex *optr) { #ifdef PD t_garray *garray; int size, indx; t_float *vec; if (!s || !(garray = (t_garray *)pd_findbyclass(s, garray_class)) || !garray_getfloatarray(garray, &size, &vec)) { optr->ex_type = ET_FLT; optr->ex_int = 0; pd_error(exp, "no such table '%s'", s->s_name); return (1); } optr->ex_type = ET_FLT; switch (arg->ex_type) { case ET_INT: indx = arg->ex_int; break; case ET_FLT: /* strange interpolation code deleted here -msp */ indx = arg->ex_flt; break; default: /* do something with strings */ pd_error(exp, "expr: bad argument for table '%s'\n", fts_symbol_name(s)); indx = 0; } if (indx < 0) indx = 0; else if (indx >= size) indx = size - 1; optr->ex_flt = vec[indx]; #else /* MSP */ /* * table lookup not done for MSP yet */ post("max_ex_tab: not complete for MSP yet!"); optr->ex_type = ET_FLT; optr->ex_flt = 0; #endif return (0); } #ifdef PD /* this goes to the end of this file as the following functions * should be defined in the expr object in MSP */ #define ISTABLE(sym, garray, size, vec) \ if (!sym || !(garray = (t_garray *)pd_findbyclass(sym, garray_class)) || \ !garray_getfloatarray(garray, &size, &vec)) { \ optr->ex_type = ET_FLT; \ optr->ex_int = 0; \ error("no such table '%s'", sym->s_name); \ return; \ } /* * ex_size -- find the size of a table */ void ex_size(t_expr *e, long int argc, struct ex_ex *argv, struct ex_ex *optr) { t_symbol *s; t_garray *garray; int size; t_float *vec; if (argv->ex_type != ET_SYM) { post("expr: size: need a table name\n"); optr->ex_type = ET_INT; optr->ex_int = 0; return; } s = (fts_symbol_t ) argv->ex_ptr; ISTABLE(s, garray, size, vec); optr->ex_type = ET_INT; optr->ex_int = size; } /* * ex_sum -- calculate the sum of all elements of a table */ void ex_sum(t_expr *e, long int argc, struct ex_ex *argv, struct ex_ex *optr) { t_symbol *s; t_garray *garray; int size; t_float *vec, sum; int indx; if (argv->ex_type != ET_SYM) { post("expr: sum: need a table name\n"); optr->ex_type = ET_INT; optr->ex_int = 0; return; } s = (fts_symbol_t ) argv->ex_ptr; ISTABLE(s, garray, size, vec); for (indx = 0, sum = 0; indx < size; indx++) sum += vec[indx]; optr->ex_type = ET_FLT; optr->ex_flt = sum; } /* * ex_Sum -- calculate the sum of table with the given boundries */ void ex_Sum(t_expr *e, long int argc, struct ex_ex *argv, struct ex_ex *optr) { t_symbol *s; t_garray *garray; int size; t_float *vec, sum; int indx, n1, n2; if (argv->ex_type != ET_SYM) { post("expr: sum: need a table name\n"); optr->ex_type = ET_INT; optr->ex_int = 0; return; } s = (fts_symbol_t ) argv->ex_ptr; ISTABLE(s, garray, size, vec); if (argv->ex_type != ET_INT || argv[1].ex_type != ET_INT) { post("expr: Sum: boundries have to be fix values\n"); optr->ex_type = ET_INT; optr->ex_int = 0; return; } n1 = argv->ex_int; n2 = argv[1].ex_int; for (indx = n1, sum = 0; indx < n2; indx++) if (indx >= 0 && indx < size) sum += vec[indx]; optr->ex_type = ET_FLT; optr->ex_flt = sum; } /* * ex_avg -- calculate the avarage of a table */ void ex_avg(t_expr *e, long int argc, struct ex_ex *argv, struct ex_ex *optr) { /* SDY - look into this function */ #if 0 fts_symbol_t s; fts_integer_vector_t *tw = 0; if (argv->ex_type != ET_SYM) { post("expr: avg: need a table name\n"); optr->ex_type = ET_INT; optr->ex_int = 0; } s = (fts_symbol_t ) argv->ex_ptr; tw = table_integer_vector_get_by_name(s); if (tw) { optr->ex_type = ET_INT; if (! fts_integer_vector_get_size(tw)) optr->ex_int = 0; else optr->ex_int = fts_integer_vector_get_sum(tw) / fts_integer_vector_get_size(tw); } else { optr->ex_type = ET_INT; optr->ex_int = 0; post("expr: avg: no such table %s\n", fts_symbol_name(s)); } #endif } /* * ex_Avg -- calculate the avarage of table with the given boundries */ void ex_Avg(t_expr *e, long int argc, struct ex_ex *argv, struct ex_ex *optr) { /* SDY - look into this function */ #if 0 fts_symbol_t s; fts_integer_vector_t *tw = 0; if (argv->ex_type != ET_SYM) { post("expr: Avg: need a table name\n"); optr->ex_type = ET_INT; optr->ex_int = 0; } s = (fts_symbol_t ) (argv++)->ex_ptr; tw = table_integer_vector_get_by_name(s); if (! tw) { optr->ex_type = ET_INT; optr->ex_int = 0; post("expr: Avg: no such table %s\n", fts_symbol_name(s)); return; } if (argv->ex_type != ET_INT || argv[1].ex_type != ET_INT) { post("expr: Avg: boundries have to be fix values\n"); optr->ex_type = ET_INT; optr->ex_int = 0; return; } optr->ex_type = ET_INT; if (argv[1].ex_int - argv->ex_int <= 0) optr->ex_int = 0; else optr->ex_int = (fts_integer_vector_get_sub_sum(tw, argv->ex_int, argv[1].ex_int) / (argv[1].ex_int - argv->ex_int)); #endif } /* * ex_store -- store a value in a table * if the index is greater the size of the table, * we will make a modulo the size of the table */ void ex_store(t_expr *e, long int argc, struct ex_ex *argv, struct ex_ex *optr) { /* SDY - look into this function */ #if 0 fts_symbol_t s; fts_integer_vector_t *tw = 0; if (argv->ex_type != ET_SYM) { post("expr: store: need a table name\n"); } s = (fts_symbol_t ) (argv++)->ex_ptr; tw = table_integer_vector_get_by_name(s); if (! tw) { optr->ex_type = ET_INT; optr->ex_int = 0; post("expr: store: no such table %s\n", fts_symbol_name(s)); return; } if (argv->ex_type != ET_INT || argv[1].ex_type != ET_INT) { post("expr: store: arguments have to be integer\n"); optr->ex_type = ET_INT; optr->ex_int = 0; } fts_integer_vector_set_element(tw, argv->ex_int < 0 ? 0 : argv->ex_int % fts_integer_vector_get_size(tw), argv[1].ex_int); *optr = argv[1]; #endif } #else /* MSP */ void pd_error(void *object, char *fmt, ...) { va_list ap; t_int arg[8]; int i; static int saidit = 0; va_start(ap, fmt); /* SDY vsprintf(error_string, fmt, ap); */ post(fmt, ap); va_end(ap); /* SDY fprintf(stderr, "error: %s\n", error_string); error_object = object; */ if (!saidit) { post("... you might be able to track this down from the Find menu."); saidit = 1; } } #endif