Update of /cvsroot/pure-data/externals/signal/expr~ In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv26382/signal/expr~

Added Files: LICENSE.txt README.txt fts_to_pd.h vexp.c vexp.h vexp_fun.c vexp_if.c Log Message: dropped in goodie bag

--- NEW FILE: vexp.c --- /* * 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. [...2103 lines suppressed...] post("%c", ','); break; case OP_SEMI: post("%c", ';'); break; default: post("expr: ex_print: bad op 0x%lx\n", eptr->ex_op); } break; default: post("expr: ex_print: bad type 0x%lx\n", eptr->ex_type); } eptr++; } post("\n"); }

#ifdef NT void ABORT( void) {bug("expr");} #endif

--- NEW FILE: vexp_fun.c --- /* * 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. [...1276 lines suppressed...] /* * ex_hypoth - Euclidean distance function */ FUNC_DEF(ex_hypoth, hypoth, (double), (double), 1);

/* * ex_round - round to nearest integer, away from zero */ FUNC_DEF_UNARY(ex_round, round, (double), 1);

/* * ex_trunc - round to interger, towards zero */ FUNC_DEF_UNARY(ex_trunc, trunc, (double), 1);

/* * ex_nearbyint - round to nearest integer */ FUNC_DEF_UNARY(ex_nearbyint, nearbyint, (double), 1); #endif

--- NEW FILE: fts_to_pd.h --- /* fts_to_pd.h -- alias some fts names to compile in Pd.

copyright 1999 Miller Puckette; permission is granted to use this file for any purpose. */

#define fts_malloc malloc #define fts_calloc calloc #define fts_free free #define fts_realloc realloc #define fts_atom_t t_atom #define fts_object_t t_object typedef t_symbol *fts_symbol_t;

#ifdef MSP #define t_atom Atom #define t_symbol Symbol #define pd_new(x) newobject(x); #define pd_free(x) freeobject(x); #define t_outlet void #define t_binbuf void typedef t_class *t_pd; typedef float t_floatarg;

#include <stdlib.h> #include <stdio.h> #include <stdarg.h> #include <string.h> #include <errno.h>

void pd_error(void *object, char *fmt, ...);

#endif /* MSP */

#define post_error pd_error #define fts_is_floatg(x) ((x)->a_type == A_FLOAT)

#define fts_new_symbol_copy gensym

#define fts_symbol_name(x) ((x)->s_name)

--- NEW FILE: vexp_if.c --- /* * 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. [...1184 lines suppressed...] 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

--- NEW FILE: LICENSE.txt ---

GNU GENERAL PUBLIC LICENSE Version 2, June 1991

Copyright (C) 1989, 1991 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.

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<signature of Ty Coon>, 1 April 1989 Ty Coon, President of Vice

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--- NEW FILE: README.txt ---

You can get more information on the expr object at http://www.crca.ucsd.edu/~yadegari/expr.html

-----------

New if Version 0.4

-access to variables (made by value object) -multiple expression separated by ; -added the following shorthands: $y or $y1 = $y1[-1] and $y2 = $y2[-1] -new functions: if - conditional evaluation cbrt - cube root erf - error function erfc - complementary error function expm1 - exponential minus 1, log1p - logarithm of 1 plus isinf - is the value infinite, finite - is the value finite isnan -- is the resut a nan (Not a number) copysign - copy sign of a number ldexp - multiply floating-point number by integral power of 2 imodf - get signed integral value from floating-point number modf - get signed fractional value from floating-point number drem - floating-point remainder function

Thanks to Orm Finnendahl for adding the following functions: fmod - floating-point remainder function ceil - ceiling function: smallest integral value not less than argument floor - largest integral value not greater than argument

------------

New in Version 0.3 -Full function functionality

------------

The object "expr" is used for expression evaluaion of control data.

Expr~ and fexpr~ are extentions to the expr object to work with vectors. The expr~ object is designed to efficiently combine signal and control stream processing by vector operations on the basis of the block size of the environment.

fexpr~ object provides a flexible mechanism for building FIR and IIR filters by evaluating expressions on a sample by sample basis and providing access to prior samples of the input and output audio streams. When fractional offset is used, fexpr~ uses linear interpolation to determine the value of the indexed sample. fexpr~ evaluates the expression for every single sample and at every evaluation previous samples (limited by the audio vector size) can be accessed. $x is used to denote a singnal input whose samples we would like to access. The syntax is $x followed by the inlet number and indexed by brackets, for example $x1[-1] specifies the previous sample of the first inlet. Therefore, if we are to build a simple filter which replaces every sample by the average of that sample and its previous one, we would use "fexpr~ ($x1[0]+$x1[-1])/2 ". For ease of when the brackets are omitted, the current sample is implied, so we can right the previous filter expression as follows: " fexpr~ ($x1+$x1[-1])/2". To build IIR filters $y is used to access the previous samples of the output stream.

The three objects expr, expr~, and fexpr~ are implemented in the same object so the files expr~.pd_linux and fexpr~.pd_linux are links to expr.pd_linux This release has been compiled and tested on Linux 6.0.

--------

Here are some syntax information: (refer to help-expr.pd for examples)

Syntyax: The syntax is very close to how expression are written in C. Variables are specified as follows where the '#' stands for the inlet number: $i#: integer input variable $f#: float input variable $s#: symbol input variable

Used for expr~ only: $v#: signal (vector) input (vector by vector evaluation)

Used for fexpr~ only: $x#[n]: the sample from inlet # indexed by n, where n has to satisfy 0 => n >= -vector size, ($x# is a shorthand for $x#[0], specifying the current sample)

$y#[n]: the output value indexed by n, where n has to satisfy 0 > n >= -vector size, $y[n] is a shorthand for $y1[n]

I'll appreciate hearing about bugs, comments, suggestions, ...

Shahrokh Yadegari (sdy@ucsd.edu) 7/10/02

--- NEW FILE: vexp.h --- /* * 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 */

#define MSP #ifdef PD #undef MSP #endif

#ifdef PD #include "m_pd.h" #else /* MSP */ #include "ext.h" #include "z_dsp.h" #endif

#include "fts_to_pd.h" /* This is put in fts_to_pd.h

#ifdef MSP #define t_atom Atom #define t_symbol Symbol #define pd_new(x) newobject(x); #define t_outlet void #endif */

/* * Currently the maximum number of variables (inlets) that are supported * is 10. */

#define MAX_VARS 9 #define MINODES 10 /* was 200 */

/* terminal defines */

/* * operations * (x<<16|y) x defines the level of precedence, * the lower the number the lower the precedence * separators are defines as operators just for convenience */

#define OP_SEMI ((long)(1<<16|1)) /* ; */ #define OP_COMMA ((long)(2<<16|2)) /* , */ #define OP_LOR ((long)(3<<16|3)) /* || */ #define OP_LAND ((long)(4<<16|4)) /* && */ #define OP_OR ((long)(5<<16|5)) /* | */ #define OP_XOR ((long)(6<<16|6)) /* ^ */ #define OP_AND ((long)(7<<16|7)) /* & */ #define OP_NE ((long)(8<<16|8)) /* != */ #define OP_EQ ((long)(8<<16|9)) /* == */ #define OP_GE ((long)(9<<16|10)) /* >= */ #define OP_GT ((long)(9<<16|11)) /* > */ #define OP_LE ((long)(9<<16|12)) /* <= */ #define OP_LT ((long)(9<<16|13)) /* < */ #define OP_SR ((long)(10<<16|14)) /* >> */ #define OP_SL ((long)(10<<16|15)) /* << */ #define OP_SUB ((long)(11<<16|16)) /* - */ #define OP_ADD ((long)(11<<16|17)) /* + */ #define OP_MOD ((long)(12<<16|18)) /* % */ #define OP_DIV ((long)(12<<16|19)) /* / */ #define OP_MUL ((long)(12<<16|20)) /* * */ #define OP_UMINUS ((long)(13<<16|21)) /* - unary minus */ #define OP_NEG ((long)(13<<16|22)) /* ~ one complement */ #define OP_NOT ((long)(13<<16|23)) /* ! */ #define OP_RB ((long)(14<<16|24)) /* ] */ #define OP_LB ((long)(14<<16|25)) /* [ */ #define OP_RP ((long)(14<<16|26)) /* ) */ #define OP_LP ((long)(14<<16|27)) /* ( */ #define OP_STORE ((long)(15<<16|28)) /* = */ #define HI_PRE ((long)(100<<16)) /* infinite precedence */ #define PRE_MASK ((long)0xffff0000) /* precedence level mask */

struct ex_ex;

#define name_ok(c) (((c)=='_') || ((c)>='a' && (c)<='z') || \ ((c)>='A' && (c)<='Z') || ((c) >= '0' && (c) <= '9')) #define unary_op(x) ((x) == OP_NOT || (x) == OP_NEG || (x) == OP_UMINUS)

struct ex_ex { union { long v_int; float v_flt; t_float *v_vec; /* this is an for allocated vector */ long op; char *ptr; } ex_cont; /* content */ #define ex_int ex_cont.v_int #define ex_flt ex_cont.v_flt #define ex_vec ex_cont.v_vec #define ex_op ex_cont.op #define ex_ptr ex_cont.ptr long ex_type; /* type of the node */ }; #define exNULL ((struct ex_ex *)0)

/* defines for ex_type */ #define ET_INT 1 /* an int */ #define ET_FLT 2 /* a float */ #define ET_OP 3 /* operator */ #define ET_STR 4 /* string */ #define ET_TBL 5 /* a table, the content is a pointer */ #define ET_FUNC 6 /* a function */ #define ET_SYM 7 /* symbol ("string") */ #define ET_VSYM 8 /* variable symbol ("$s?") */ /* we treat parenthesis and brackets */ /* special to keep a pointer to their */ /* match in the content */ #define ET_LP 9 /* left parenthesis */ #define ET_LB 10 /* left bracket */ #define ET_II 11 /* and integer inlet */ #define ET_FI 12 /* float inlet */ #define ET_SI 13 /* string inlet */ #define ET_VI 14 /* signal inlet */ #define ET_VEC 15 /* allocated signal vector */ /* special types for fexpr~ */ #define ET_YO 16 /* vector output for fexpr~ */ #define ET_YOM1 17 /* shorthand for $y?[-1] */ #define ET_XI 18 /* vector input for fexpr~ */ #define ET_XI0 20 /* shorthand for $x?[0] */ #define ET_VAR 21 /* variable */

/* defines for ex_flags */ #define EF_TYPE_MASK 0x07 /* first three bits define the type of expr */ #define EF_EXPR 0x01 /* expr - control in and out */ #define EF_EXPR_TILDE 0x02 /* expr~ signal and control in, signal out */ #define EF_FEXPR_TILDE 0x04 /* fexpr~ filter expression */

#define EF_STOP 0x08 /* is it stopped used for expr~ and fexpr~ */ #define EF_VERBOSE 0x10 /* verbose mode */

#define IS_EXPR(x) ((((x)->exp_flags&EF_TYPE_MASK)|EF_EXPR) == EF_EXPR) #define IS_EXPR_TILDE(x) \ ((((x)->exp_flags&EF_TYPE_MASK)|EF_EXPR_TILDE)==EF_EXPR_TILDE) #define IS_FEXPR_TILDE(x) \ ((((x)->exp_flags&EF_TYPE_MASK)|EF_FEXPR_TILDE)==EF_FEXPR_TILDE)

#define SET_EXPR(x) (x)->exp_flags |= EF_EXPR; \ (x)->exp_flags &= ~EF_EXPR_TILDE; \ (x)->exp_flags &= ~EF_FEXPR_TILDE;

#define SET_EXPR_TILDE(x) (x)->exp_flags &= ~EF_EXPR; \ (x)->exp_flags |= EF_EXPR_TILDE; \ (x)->exp_flags &= ~EF_FEXPR_TILDE;

#define SET_FEXPR_TILDE(x) (x)->exp_flags &= ~EF_EXPR; \ (x)->exp_flags &= ~EF_EXPR_TILDE; \ (x)->exp_flags |= EF_FEXPR_TILDE;

/* * defines for expr_error */ #define EE_DZ 0x01 /* divide by zero error */ #define EE_BI_OUTPUT 0x02 /* Bad output index */ #define EE_BI_INPUT 0x04 /* Bad input index */ #define EE_NOTABLE 0x08 /* NO TABLE */ #define EE_NOVAR 0x10 /* NO VARIABLE */

typedef struct expr { #ifdef PD t_object exp_ob; #else /* MSP */ t_pxobject exp_ob; #endif int exp_flags; /* are we expr~, fexpr~, or expr */ int exp_error; /* reported errors */ int exp_nexpr; /* number of expressions */ char *exp_string; /* the full expression string */ char *exp_str; /* current parsing position */ t_outlet *exp_outlet[MAX_VARS]; #ifdef PD struct _exprproxy *exp_proxy; #else /* MAX */ void *exp_proxy[MAX_VARS]; long exp_proxy_id; #endif struct ex_ex *exp_stack[MAX_VARS]; struct ex_ex exp_var[MAX_VARS]; struct ex_ex exp_res[MAX_VARS]; /* the evluation result */ t_float *exp_p_var[MAX_VARS]; t_float *exp_p_res[MAX_VARS]; /* the previous evaluation result */ t_float *exp_tmpres[MAX_VARS]; /* temporty result for fexpr~ */ int exp_vsize; /* the size of the signal vector */ int exp_nivec; /* # of vector inlets */ float exp_f; /* control value to be transformed to signal */ } t_expr;

typedef struct ex_funcs { char *f_name; /* function name */ void (*f_func)(t_expr *, long, struct ex_ex *, struct ex_ex *); /* the real function performing the function (void, no return!!!) */ long f_argc; /* number of arguments */ } t_ex_func;

/* function prototypes for pd-related functions called withing vexp.h */

extern int max_ex_tab(struct expr *expr, t_symbol *s, struct ex_ex *arg, struct ex_ex *optr); extern int max_ex_var(struct expr *expr, t_symbol *s, struct ex_ex *optr); extern int ex_getsym(char *p, t_symbol **s); extern const char *ex_symname(t_symbol *s); void ex_mkvector(t_float *fp, t_float x, int size); extern void ex_size(t_expr *expr, long int argc, struct ex_ex *argv, struct ex_ex *optr); extern void ex_sum(t_expr *expr, long int argc, struct ex_ex *argv, struct ex_ex *optr); extern void ex_Sum(t_expr *expr, long int argc, struct ex_ex *argv, struct ex_ex *optr); extern void ex_avg(t_expr *expr, long int argc, struct ex_ex *argv, struct ex_ex *optr); extern void ex_Avg(t_expr *expr, long int argc, struct ex_ex *argv, struct ex_ex *optr); extern void ex_store(t_expr *expr, long int argc, struct ex_ex *argv, struct ex_ex *optr);

int value_getonly(t_symbol *s, t_float *f);

#ifdef NT #pragma warning (disable: 4305 4244)

#define abort ABORT void ABORT(void); #endif