/* 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.  */

#ifndef __m_pd_h_

#if defined(_LANGUAGE_C_PLUS_PLUS) || defined(__cplusplus)
extern "C" {
#endif

#define PD_MAJOR_VERSION 0
#define PD_MINOR_VERSION 43
#define PD_BUGFIX_VERSION 1
#define PD_TEST_VERSION "double-20111024"

/* old name for "MSW" flag -- we have to take it for the sake of many old
"nmakefiles" for externs, which will define NT and not MSW */
#if defined(NT) && !defined(MSW)
#define MSW
#endif

/* These pragmas are only used for MSVC, not MinGW or Cygwin <hans@at.or.at> */
#ifdef _MSC_VER
/* #pragma warning( disable : 4091 ) */
#pragma warning( disable : 4305 )  /* uncast const double to float */
#pragma warning( disable : 4244 )  /* uncast float/int conversion etc. */
#pragma warning( disable : 4101 )  /* unused automatic variables */
#endif /* _MSC_VER */

    /* the external storage class is "extern" in UNIX; in MSW it's ugly. */
#ifdef MSW
#ifdef PD_INTERNAL
#define EXTERN __declspec(dllexport) extern
#else
#define EXTERN __declspec(dllimport) extern
#endif /* PD_INTERNAL */
#else
#define EXTERN extern
#endif /* MSW */

    /* and depending on the compiler, hidden data structures are
    declared differently: */
#if defined( __GNUC__) || defined( __BORLANDC__ ) || defined( __MWERKS__ )
#define EXTERN_STRUCT struct
#else
#define EXTERN_STRUCT extern struct
#endif

/* Define some attributes, specific to the compiler */
#if defined(__GNUC__)
#define ATTRIBUTE_FORMAT_PRINTF(a, b) __attribute__ ((format (printf, a, b)))
#else
#define ATTRIBUTE_FORMAT_PRINTF(a, b)
#endif

#if !defined(_SIZE_T) && !defined(_SIZE_T_)
#include <stddef.h>     /* just for size_t -- how lame! */
#endif

#define MAXPDSTRING 1000        /* use this for anything you want */
#define MAXPDARG 5              /* max number of args we can typecheck today */

/* signed and unsigned integer types the size of a pointer:  */
#if !defined(PD_LONGINTTYPE)
#define PD_LONGINTTYPE long
#endif

/* float precision default is set to 64 bits, in order to facilitate testing
of Pd-extended double precision builds, while it is not yet possible to define 
PD_FLOAT_PRECISION throughout the build system of all external libs otherwise.
LATER this default should be set to 32 bits, to comply with Pd as we know it  */
#if !defined(PD_FLOAT_PRECISION)
#define PD_FLOAT_PRECISION 64   /* 32 for single precision or 64 for double precision */
#endif

#if PD_FLOAT_PRECISION == 32
#define PD_FLOATTYPE float
#elif PD_FLOAT_PRECISION == 64
#define PD_FLOATTYPE double
#else
#error invalid PD_FLOATPRECISION: must be 32 or 64
#endif

typedef PD_LONGINTTYPE t_int;       /* pointer-size integer */
typedef PD_FLOATTYPE t_float;       /* a float type */
typedef PD_FLOATTYPE t_floatarg;    /* float type for function calls */

typedef struct _symbol
{
    char *s_name;
    struct _class **s_thing;
    struct _symbol *s_next;
} t_symbol;

EXTERN_STRUCT _array;
#define t_array struct _array       /* g_canvas.h */

/* pointers to glist and array elements go through a "stub" which sticks
around after the glist or array is freed.  The stub itself is deleted when
both the glist/array is gone and the refcount is zero, ensuring that no
gpointers are pointing here. */

#define GP_NONE 0       /* the stub points nowhere (has been cut off) */
#define GP_GLIST 1      /* the stub points to a glist element */
#define GP_ARRAY 2      /* ... or array */

typedef struct _gstub
{
    union
    {
        struct _glist *gs_glist;    /* glist we're in */
        struct _array *gs_array;    /* array we're in */
    } gs_un;
    int gs_which;                   /* GP_GLIST/GP_ARRAY */
    int gs_refcount;                /* number of gpointers pointing here */
} t_gstub;

typedef struct _gpointer           /* pointer to a gobj in a glist */
{
    union
    {   
        struct _scalar *gp_scalar;  /* scalar we're in (if glist) */
        union word *gp_w;           /* raw data (if array) */
    } gp_un;
    int gp_valid;                   /* number which must match gpointee */
    t_gstub *gp_stub;               /* stub which points to glist/array */
} t_gpointer;

typedef union word
{
    t_float w_float;
    t_symbol *w_symbol;
    t_gpointer *w_gpointer;
    t_array *w_array;
    struct _glist *w_list;
    int w_index;
} t_word;

typedef enum
{
    A_NULL,
    A_FLOAT,
    A_SYMBOL,
    A_POINTER,
    A_SEMI,
    A_COMMA,
    A_DEFFLOAT,
    A_DEFSYM,
    A_DOLLAR, 
    A_DOLLSYM,
    A_GIMME,
    A_CANT
}  t_atomtype;

#define A_DEFSYMBOL A_DEFSYM    /* better name for this */

typedef struct _atom
{
    t_atomtype a_type;
    union word a_w;
} t_atom;

EXTERN_STRUCT _class;
#define t_class struct _class

EXTERN_STRUCT _outlet;
#define t_outlet struct _outlet

EXTERN_STRUCT _inlet;
#define t_inlet struct _inlet

EXTERN_STRUCT _binbuf;
#define t_binbuf struct _binbuf

EXTERN_STRUCT _clock;
#define t_clock struct _clock

EXTERN_STRUCT _outconnect;
#define t_outconnect struct _outconnect

EXTERN_STRUCT _glist;
#define t_glist struct _glist
#define t_canvas struct _glist  /* LATER lose this */

typedef t_class *t_pd;      /* pure datum: nothing but a class pointer */

typedef struct _gobj        /* a graphical object */
{
    t_pd g_pd;              /* pure datum header (class) */
    struct _gobj *g_next;   /* next in list */
} t_gobj;

typedef struct _scalar      /* a graphical object holding data */
{
    t_gobj sc_gobj;         /* header for graphical object */
    t_symbol *sc_template;  /* template name (LATER replace with pointer) */
    t_word sc_vec[1];       /* indeterminate-length array of words */
} t_scalar;

typedef struct _text        /* patchable object - graphical, with text */
{
    t_gobj te_g;                /* header for graphical object */
    t_binbuf *te_binbuf;        /* holder for the text */
    t_outlet *te_outlet;        /* linked list of outlets */
    t_inlet *te_inlet;          /* linked list of inlets */
    short te_xpix;              /* x&y location (within the toplevel) */
    short te_ypix;
    short te_width;             /* requested width in chars, 0 if auto */
    unsigned int te_type:2;     /* from defs below */
} t_text;

#define T_TEXT 0        /* just a textual comment */
#define T_OBJECT 1      /* a MAX style patchable object */
#define T_MESSAGE 2     /* a MAX stype message */
#define T_ATOM 3        /* a cell to display a number or symbol */

#define te_pd te_g.g_pd

   /* t_object is synonym for t_text (LATER unify them) */

typedef struct _text t_object;

#define ob_outlet te_outlet
#define ob_inlet te_inlet
#define ob_binbuf te_binbuf
#define ob_pd te_g.g_pd
#define ob_g te_g

typedef void (*t_method)(void);
typedef void *(*t_newmethod)( void);
typedef void (*t_gotfn)(void *x, ...);

/* ---------------- pre-defined objects and symbols --------------*/
EXTERN t_pd pd_objectmaker;     /* factory for creating "object" boxes */
EXTERN t_pd pd_canvasmaker;     /* factory for creating canvases */
EXTERN t_symbol s_pointer;
EXTERN t_symbol s_float;
EXTERN t_symbol s_symbol;
EXTERN t_symbol s_bang;
EXTERN t_symbol s_list;
EXTERN t_symbol s_anything;
EXTERN t_symbol s_signal;
EXTERN t_symbol s__N;
EXTERN t_symbol s__X;
EXTERN t_symbol s_x;
EXTERN t_symbol s_y;
EXTERN t_symbol s_;

/* --------- prototypes from the central message system ----------- */
EXTERN void pd_typedmess(t_pd *x, t_symbol *s, int argc, t_atom *argv);
EXTERN void pd_forwardmess(t_pd *x, int argc, t_atom *argv);
EXTERN t_symbol *gensym(const char *s);
EXTERN t_gotfn getfn(t_pd *x, t_symbol *s);
EXTERN t_gotfn zgetfn(t_pd *x, t_symbol *s);
EXTERN void nullfn(void);
EXTERN void pd_vmess(t_pd *x, t_symbol *s, char *fmt, ...);
#define mess0(x, s) ((*getfn((x), (s)))((x)))
#define mess1(x, s, a) ((*getfn((x), (s)))((x), (a)))
#define mess2(x, s, a,b) ((*getfn((x), (s)))((x), (a),(b)))
#define mess3(x, s, a,b,c) ((*getfn((x), (s)))((x), (a),(b),(c)))
#define mess4(x, s, a,b,c,d) ((*getfn((x), (s)))((x), (a),(b),(c),(d)))
#define mess5(x, s, a,b,c,d,e) ((*getfn((x), (s)))((x), (a),(b),(c),(d),(e)))
EXTERN void obj_list(t_object *x, t_symbol *s, int argc, t_atom *argv);
EXTERN t_pd *pd_newest(void);

/* --------------- memory management -------------------- */
EXTERN void *getbytes(size_t nbytes);
EXTERN void *getzbytes(size_t nbytes);
EXTERN void *copybytes(void *src, size_t nbytes);
EXTERN void freebytes(void *x, size_t nbytes);
EXTERN void *resizebytes(void *x, size_t oldsize, size_t newsize);

/* -------------------- atoms ----------------------------- */

#define SETSEMI(atom) ((atom)->a_type = A_SEMI, (atom)->a_w.w_index = 0)
#define SETCOMMA(atom) ((atom)->a_type = A_COMMA, (atom)->a_w.w_index = 0)
#define SETPOINTER(atom, gp) ((atom)->a_type = A_POINTER, \
    (atom)->a_w.w_gpointer = (gp))
#define SETFLOAT(atom, f) ((atom)->a_type = A_FLOAT, (atom)->a_w.w_float = (f))
#define SETSYMBOL(atom, s) ((atom)->a_type = A_SYMBOL, \
    (atom)->a_w.w_symbol = (s))
#define SETDOLLAR(atom, n) ((atom)->a_type = A_DOLLAR, \
    (atom)->a_w.w_index = (n))
#define SETDOLLSYM(atom, s) ((atom)->a_type = A_DOLLSYM, \
    (atom)->a_w.w_symbol= (s))

EXTERN t_float atom_getfloat(t_atom *a);
EXTERN t_int atom_getint(t_atom *a);
EXTERN t_symbol *atom_getsymbol(t_atom *a);
EXTERN t_symbol *atom_gensym(t_atom *a);
EXTERN t_float atom_getfloatarg(int which, int argc, t_atom *argv);
EXTERN t_int atom_getintarg(int which, int argc, t_atom *argv);
EXTERN t_symbol *atom_getsymbolarg(int which, int argc, t_atom *argv);

EXTERN void atom_string(t_atom *a, char *buf, unsigned int bufsize);

/* ------------------  binbufs --------------- */

EXTERN t_binbuf *binbuf_new(void);
EXTERN void binbuf_free(t_binbuf *x);
EXTERN t_binbuf *binbuf_duplicate(t_binbuf *y);

EXTERN void binbuf_text(t_binbuf *x, char *text, size_t size);
EXTERN void binbuf_gettext(t_binbuf *x, char **bufp, int *lengthp);
EXTERN void binbuf_clear(t_binbuf *x);
EXTERN void binbuf_add(t_binbuf *x, int argc, t_atom *argv);
EXTERN void binbuf_addv(t_binbuf *x, char *fmt, ...);
EXTERN void binbuf_addbinbuf(t_binbuf *x, t_binbuf *y);
EXTERN void binbuf_addsemi(t_binbuf *x);
EXTERN void binbuf_restore(t_binbuf *x, int argc, t_atom *argv);
EXTERN void binbuf_print(t_binbuf *x);
EXTERN int binbuf_getnatom(t_binbuf *x);
EXTERN t_atom *binbuf_getvec(t_binbuf *x);
EXTERN void binbuf_eval(t_binbuf *x, t_pd *target, int argc, t_atom *argv);
EXTERN int binbuf_read(t_binbuf *b, char *filename, char *dirname,
    int crflag);
EXTERN int binbuf_read_via_canvas(t_binbuf *b, char *filename, t_canvas *canvas,
    int crflag);
EXTERN int binbuf_read_via_path(t_binbuf *b, char *filename, char *dirname,
    int crflag);
EXTERN int binbuf_write(t_binbuf *x, char *filename, char *dir,
    int crflag);
EXTERN void binbuf_evalfile(t_symbol *name, t_symbol *dir);
EXTERN t_symbol *binbuf_realizedollsym(t_symbol *s, int ac, t_atom *av,
    int tonew);

/* ------------------  clocks --------------- */

EXTERN t_clock *clock_new(void *owner, t_method fn);
EXTERN void clock_set(t_clock *x, double systime);
EXTERN void clock_delay(t_clock *x, double delaytime);
EXTERN void clock_unset(t_clock *x);
EXTERN double clock_getlogicaltime(void);
EXTERN double clock_getsystime(void); /* OBSOLETE; use clock_getlogicaltime() */
EXTERN double clock_gettimesince(double prevsystime);
EXTERN double clock_getsystimeafter(double delaytime);
EXTERN void clock_free(t_clock *x);

/* ----------------- pure data ---------------- */
EXTERN t_pd *pd_new(t_class *cls);
EXTERN void pd_free(t_pd *x);
EXTERN void pd_bind(t_pd *x, t_symbol *s);
EXTERN void pd_unbind(t_pd *x, t_symbol *s);
EXTERN t_pd *pd_findbyclass(t_symbol *s, t_class *c);
EXTERN void pd_pushsym(t_pd *x);
EXTERN void pd_popsym(t_pd *x);
EXTERN t_symbol *pd_getfilename(void);
EXTERN t_symbol *pd_getdirname(void);
EXTERN void pd_bang(t_pd *x);
EXTERN void pd_pointer(t_pd *x, t_gpointer *gp);
EXTERN void pd_float(t_pd *x, t_float f);
EXTERN void pd_symbol(t_pd *x, t_symbol *s);
EXTERN void pd_list(t_pd *x, t_symbol *s, int argc, t_atom *argv);
EXTERN void pd_anything(t_pd *x, t_symbol *s, int argc, t_atom *argv);
#define pd_class(x) (*(x))

/* ----------------- pointers ---------------- */
EXTERN void gpointer_init(t_gpointer *gp);
EXTERN void gpointer_copy(const t_gpointer *gpfrom, t_gpointer *gpto);
EXTERN void gpointer_unset(t_gpointer *gp);
EXTERN int gpointer_check(const t_gpointer *gp, int headok);

/* ----------------- patchable "objects" -------------- */
EXTERN t_inlet *inlet_new(t_object *owner, t_pd *dest, t_symbol *s1,
    t_symbol *s2);
EXTERN t_inlet *pointerinlet_new(t_object *owner, t_gpointer *gp);
EXTERN t_inlet *floatinlet_new(t_object *owner, t_float *fp);
EXTERN t_inlet *symbolinlet_new(t_object *owner, t_symbol **sp);
EXTERN t_inlet *signalinlet_new(t_object *owner, t_float f);
EXTERN void inlet_free(t_inlet *x);

EXTERN t_outlet *outlet_new(t_object *owner, t_symbol *s);
EXTERN void outlet_bang(t_outlet *x);
EXTERN void outlet_pointer(t_outlet *x, t_gpointer *gp);
EXTERN void outlet_float(t_outlet *x, t_float f);
EXTERN void outlet_symbol(t_outlet *x, t_symbol *s);
EXTERN void outlet_list(t_outlet *x, t_symbol *s, int argc, t_atom *argv);
EXTERN void outlet_anything(t_outlet *x, t_symbol *s, int argc, t_atom *argv);
EXTERN t_symbol *outlet_getsymbol(t_outlet *x);
EXTERN void outlet_free(t_outlet *x);
EXTERN t_object *pd_checkobject(t_pd *x);


/* -------------------- canvases -------------- */

EXTERN void glob_setfilename(void *dummy, t_symbol *name, t_symbol *dir);

EXTERN void canvas_setargs(int argc, t_atom *argv);
EXTERN void canvas_getargs(int *argcp, t_atom **argvp);
EXTERN t_symbol *canvas_getcurrentdir(void);
EXTERN t_glist *canvas_getcurrent(void);
EXTERN void canvas_makefilename(t_glist *c, char *file,
    char *result,int resultsize);
EXTERN t_symbol *canvas_getdir(t_glist *x);
EXTERN char sys_font[]; /* default typeface set in s_main.c */
EXTERN char sys_fontweight[]; /* default font weight set in s_main.c */
EXTERN int sys_fontwidth(int fontsize);
EXTERN int sys_fontheight(int fontsize);
EXTERN void canvas_dataproperties(t_glist *x, t_scalar *sc, t_binbuf *b);
EXTERN int canvas_open(t_canvas *x, const char *name, const char *ext,
    char *dirresult, char **nameresult, unsigned int size, int bin);

/* ---------------- widget behaviors ---------------------- */

EXTERN_STRUCT _widgetbehavior;
#define t_widgetbehavior struct _widgetbehavior

EXTERN_STRUCT _parentwidgetbehavior;
#define t_parentwidgetbehavior struct _parentwidgetbehavior
EXTERN t_parentwidgetbehavior *pd_getparentwidget(t_pd *x);

/* -------------------- classes -------------- */

#define CLASS_DEFAULT 0         /* flags for new classes below */
#define CLASS_PD 1
#define CLASS_GOBJ 2
#define CLASS_PATCHABLE 3
#define CLASS_NOINLET 8

#define CLASS_TYPEMASK 3


EXTERN t_class *class_new(t_symbol *name, t_newmethod newmethod,
    t_method freemethod, size_t size, int flags, t_atomtype arg1, ...);
EXTERN void class_addcreator(t_newmethod newmethod, t_symbol *s, 
    t_atomtype type1, ...);
EXTERN void class_addmethod(t_class *c, t_method fn, t_symbol *sel,
    t_atomtype arg1, ...);
EXTERN void class_addbang(t_class *c, t_method fn);
EXTERN void class_addpointer(t_class *c, t_method fn);
EXTERN void class_doaddfloat(t_class *c, t_method fn);
EXTERN void class_addsymbol(t_class *c, t_method fn);
EXTERN void class_addlist(t_class *c, t_method fn);
EXTERN void class_addanything(t_class *c, t_method fn);
EXTERN void class_sethelpsymbol(t_class *c, t_symbol *s);
EXTERN void class_setwidget(t_class *c, t_widgetbehavior *w);
EXTERN void class_setparentwidget(t_class *c, t_parentwidgetbehavior *w);
EXTERN t_parentwidgetbehavior *class_parentwidget(t_class *c);
EXTERN char *class_getname(t_class *c);
EXTERN char *class_gethelpname(t_class *c);
EXTERN void class_setdrawcommand(t_class *c);
EXTERN int class_isdrawcommand(t_class *c);
EXTERN void class_domainsignalin(t_class *c, int onset);
EXTERN void class_set_extern_dir(t_symbol *s);
#define CLASS_MAINSIGNALIN(c, type, field) \
    class_domainsignalin(c, (char *)(&((type *)0)->field) - (char *)0)

         /* prototype for functions to save Pd's to a binbuf */
typedef void (*t_savefn)(t_gobj *x, t_binbuf *b);
EXTERN void class_setsavefn(t_class *c, t_savefn f);
EXTERN t_savefn class_getsavefn(t_class *c);
        /* prototype for functions to open properties dialogs */
typedef void (*t_propertiesfn)(t_gobj *x, struct _glist *glist);
EXTERN void class_setpropertiesfn(t_class *c, t_propertiesfn f);
EXTERN t_propertiesfn class_getpropertiesfn(t_class *c);

#ifndef PD_CLASS_DEF
#define class_addbang(x, y) class_addbang((x), (t_method)(y))
#define class_addpointer(x, y) class_addpointer((x), (t_method)(y))
#define class_addfloat(x, y) class_doaddfloat((x), (t_method)(y))
#define class_addsymbol(x, y) class_addsymbol((x), (t_method)(y))
#define class_addlist(x, y) class_addlist((x), (t_method)(y))
#define class_addanything(x, y) class_addanything((x), (t_method)(y))
#endif

/* ------------   printing --------------------------------- */
EXTERN void post(const char *fmt, ...);
EXTERN void startpost(const char *fmt, ...);
EXTERN void poststring(const char *s);
EXTERN void postfloat(t_floatarg f);
EXTERN void postatom(int argc, t_atom *argv);
EXTERN void endpost(void);
EXTERN void error(const char *fmt, ...) ATTRIBUTE_FORMAT_PRINTF(1, 2);
EXTERN void verbose(int level, const char *fmt, ...) ATTRIBUTE_FORMAT_PRINTF(2, 3);
EXTERN void bug(const char *fmt, ...) ATTRIBUTE_FORMAT_PRINTF(1, 2);
EXTERN void pd_error(void *object, const char *fmt, ...) ATTRIBUTE_FORMAT_PRINTF(2, 3);
EXTERN void logpost(const void *object, const int level, const char *fmt, ...)
    ATTRIBUTE_FORMAT_PRINTF(3, 4);
EXTERN void sys_logerror(const char *object, const char *s);
EXTERN void sys_unixerror(const char *object);
EXTERN void sys_ouch(void);


/* ------------  system interface routines ------------------- */
EXTERN int sys_isreadablefile(const char *name);
EXTERN int sys_isabsolutepath(const char *dir);
EXTERN void sys_bashfilename(const char *from, char *to);
EXTERN void sys_unbashfilename(const char *from, char *to);
EXTERN int open_via_path(const char *name, const char *ext, const char *dir,
    char *dirresult, char **nameresult, unsigned int size, int bin);
EXTERN int sys_close(int fd);
EXTERN int sched_geteventno(void);
EXTERN double sys_getrealtime(void);
EXTERN int (*sys_idlehook)(void);   /* hook to add idle time computation */


/* ------------  threading ------------------- */ 
EXTERN void sys_lock(void);
EXTERN void sys_unlock(void);
EXTERN int sys_trylock(void);


/* --------------- signals ----------------------------------- */

typedef PD_FLOATTYPE t_sample;
#define MAXLOGSIG 32
#define MAXSIGSIZE (1 << MAXLOGSIG)

typedef struct _signal
{
    int s_n;            /* number of points in the array */
    t_sample *s_vec;    /* the array */
    t_float s_sr;         /* sample rate */
    int s_refcount;     /* number of times used */
    int s_isborrowed;   /* whether we're going to borrow our array */
    struct _signal *s_borrowedfrom;     /* signal to borrow it from */
    struct _signal *s_nextfree;         /* next in freelist */
    struct _signal *s_nextused;         /* next in used list */
    int s_vecsize;      /* allocated size of array in points */
} t_signal;

typedef t_int *(*t_perfroutine)(t_int *args);

EXTERN t_int *plus_perform(t_int *args);
EXTERN t_int *zero_perform(t_int *args);
EXTERN t_int *copy_perform(t_int *args);

EXTERN void dsp_add_plus(t_sample *in1, t_sample *in2, t_sample *out, int n);
EXTERN void dsp_add_copy(t_sample *in, t_sample *out, int n);
EXTERN void dsp_add_scalarcopy(t_float *in, t_sample *out, int n);
EXTERN void dsp_add_zero(t_sample *out, int n);

EXTERN int sys_getblksize(void);
EXTERN t_float sys_getsr(void);
EXTERN int sys_get_inchannels(void);
EXTERN int sys_get_outchannels(void);

EXTERN void dsp_add(t_perfroutine f, int n, ...);
EXTERN void dsp_addv(t_perfroutine f, int n, t_int *vec);
EXTERN void pd_fft(t_float *buf, int npoints, int inverse);
EXTERN int ilog2(int n);

EXTERN void mayer_fht(t_sample *fz, int n);
EXTERN void mayer_fft(int n, t_sample *real, t_sample *imag);
EXTERN void mayer_ifft(int n, t_sample *real, t_sample *imag);
EXTERN void mayer_realfft(int n, t_sample *real);
EXTERN void mayer_realifft(int n, t_sample *real);

EXTERN t_float *cos_table;
#define LOGCOSTABSIZE 9
#define COSTABSIZE (1<<LOGCOSTABSIZE)

EXTERN int canvas_suspend_dsp(void);
EXTERN void canvas_resume_dsp(int oldstate);
EXTERN void canvas_update_dsp(void);
EXTERN int canvas_dspstate;

/*   up/downsampling */
typedef struct _resample
{
  int method;       /* up/downsampling method ID */

  t_int downsample; /* downsampling factor */
  t_int upsample;   /* upsampling factor */

  t_sample *s_vec;   /* here we hold the resampled data */
  int      s_n;

  t_sample *coeffs;  /* coefficients for filtering... */
  int      coefsize;

  t_sample *buffer;  /* buffer for filtering */
  int      bufsize;
} t_resample;

EXTERN void resample_init(t_resample *x);
EXTERN void resample_free(t_resample *x);

EXTERN void resample_dsp(t_resample *x, t_sample *in, int insize, t_sample *out, int outsize, int method);
EXTERN void resamplefrom_dsp(t_resample *x, t_sample *in, int insize, int outsize, int method);
EXTERN void resampleto_dsp(t_resample *x, t_sample *out, int insize, int outsize, int method);

/* ----------------------- utility functions for signals -------------- */
EXTERN t_float mtof(t_float);
EXTERN t_float ftom(t_float);
EXTERN t_float rmstodb(t_float);
EXTERN t_float powtodb(t_float);
EXTERN t_float dbtorms(t_float);
EXTERN t_float dbtopow(t_float);

EXTERN t_float q8_sqrt(t_float);
EXTERN t_float q8_rsqrt(t_float);
#ifndef N32     
EXTERN t_float qsqrt(t_float);  /* old names kept for extern compatibility */
EXTERN t_float qrsqrt(t_float);
#endif
/* --------------------- data --------------------------------- */

    /* graphical arrays */
EXTERN_STRUCT _garray;
#define t_garray struct _garray

EXTERN t_class *garray_class;
EXTERN int garray_getfloatarray(t_garray *x, int *size, t_float **vec);
EXTERN int garray_getfloatwords(t_garray *x, int *size, t_word **vec);
EXTERN void garray_redraw(t_garray *x);
EXTERN int garray_npoints(t_garray *x);
EXTERN char *garray_vec(t_garray *x);
EXTERN void garray_resize(t_garray *x, t_floatarg f);  /* avoid; use this: */
EXTERN void garray_resize_long(t_garray *x, long n);   /* better version */
EXTERN void garray_usedindsp(t_garray *x);
EXTERN void garray_setsaveit(t_garray *x, int saveit);
EXTERN t_class *scalar_class;

EXTERN t_float *value_get(t_symbol *s);
EXTERN void value_release(t_symbol *s);
EXTERN int value_getfloat(t_symbol *s, t_float *f);
EXTERN int value_setfloat(t_symbol *s, t_float f);

/* ------- GUI interface - functions to send strings to TK --------- */
typedef void (*t_guicallbackfn)(t_gobj *client, t_glist *glist);

EXTERN void sys_vgui(char *fmt, ...);
EXTERN void sys_gui(char *s);
EXTERN void sys_pretendguibytes(int n);
EXTERN void sys_queuegui(void *client, t_glist *glist, t_guicallbackfn f);
EXTERN void sys_unqueuegui(void *client);
    /* dialog window creation and destruction */
EXTERN void gfxstub_new(t_pd *owner, void *key, const char *cmd);
EXTERN void gfxstub_deleteforkey(void *key);

extern t_class *glob_pdobject;  /* object to send "pd" messages */

/*-------------  Max 0.26 compatibility --------------------*/

/* the following reflects the new way classes are laid out, with the class
   pointing to the messlist and not vice versa. Externs shouldn't feel it. */
typedef t_class *t_externclass;

EXTERN void c_extern(t_externclass *cls, t_newmethod newroutine,
    t_method freeroutine, t_symbol *name, size_t size, int tiny, \
    t_atomtype arg1, ...);
EXTERN void c_addmess(t_method fn, t_symbol *sel, t_atomtype arg1, ...);

#define t_getbytes getbytes
#define t_freebytes freebytes
#define t_resizebytes resizebytes
#define typedmess pd_typedmess
#define vmess pd_vmess

/* A definition to help gui objects straddle 0.34-0.35 changes.  If this is
defined, there is a "te_xpix" field in objects, not a "te_xpos" as before: */

#define PD_USE_TE_XPIX

#if defined(__i386__) || defined(__x86_64__) // Type punning code:

#if PD_FLOAT_PRECISION == 32

typedef  union
{
    t_float f;
    unsigned int ui; 
}t_bigorsmall32; 

static inline int PD_BADFLOAT(t_float f)    // test for NANs, infs and denormals
{
    t_bigorsmall32 pun;
    pun.f = f;
    pun.ui &= 0x7f800000;
    return((pun.ui == 0) | (pun.ui == 0x7f800000));
}

static inline int PD_BIGORSMALL(t_float f)  // > abs(2^64) or < abs(2^-64)
{
    t_bigorsmall32 pun;
    pun.f = f;
    return((pun.ui & 0x20000000) == ((pun.ui >> 1) & 0x20000000));
}
    
#elif PD_FLOAT_PRECISION == 64

typedef  union
{
    t_float f;
    unsigned int ui[2]; 
}t_bigorsmall64; 

static inline int PD_BADFLOAT(t_float f)    // test for NANs, infs and denormals
{
    t_bigorsmall64 pun;
    pun.f = f;
    pun.ui[1] &= 0x7ff00000;
    return((pun.ui[1] == 0) | (pun.ui[1] == 0x7ff00000));
}

static inline int PD_BIGORSMALL(t_float f)  // > abs(2^512) or < abs(2^-512)
{
    t_bigorsmall64 pun;
    pun.f = f;
    return((pun.ui[1] & 0x20000000) == ((pun.ui[1] >> 1) & 0x20000000));
}

#endif // endif PD_FLOAT_PRECISION
#else   // if not defined(__i386__) || defined(__x86_64__)
#define PD_BADFLOAT(f) 0
#define PD_BIGORSMALL(f) 0
#endif // end if defined(__i386__) || defined(__x86_64__)

    /* get version number at run time */
EXTERN void sys_getversion(int *major, int *minor, int *bugfix);

#if defined(_LANGUAGE_C_PLUS_PLUS) || defined(__cplusplus)
}
#endif

#define __m_pd_h_
#endif /* __m_pd_h_ */
