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/* tab2flist started 20090121 by mrpeach */
/* Message with two floats dumps a list of floats from a table at offset,length */
/* Bang dumps the entire table as a list of floats */
/* Floats at negative offsets will not be dumped. */
#include "m_pd.h"
#if (PD_MINOR_VERSION > 40)
#define USE_GETFLOATWORDS *//* if garray_getfloatwords is implemented */
#endif
/* garray_getfloatwords uses t_word but doesn't exist in some versions of pd */
/* garray_getfloatarray uses t_float but is not 64-bit */
static t_class *tab2flist_class;
typedef struct _tab2flist
{
t_object x_obj;
t_outlet *x_listout;
t_symbol *x_arrayname;
t_float x_offset;
t_float x_length;
t_float *x_delimiters;
int x_n_delimiters;
} t_tab2flist;
static void tab2flist_delimit(t_tab2flist *x, int *argc, t_atom *argv);
//static void tab2flist_list(t_tab2flist *x, t_symbol *s, int argc, t_atom *argv);
static void tab2flist_float(t_tab2flist *x, t_float f);
static void tab2flist_bang(t_tab2flist *x);
static void tab2flist_set(t_tab2flist *x, t_symbol *s);
static void tab2flist_delimiter(t_tab2flist *x, t_symbol *s, int argc, t_atom *argv);
static void tab2flist_free(t_tab2flist *x);
static void *tab2flist_new(t_symbol *s);
void tab2flist_setup(void);
static void tab2flist_bang(t_tab2flist *x)
{
/* output a list of x_length floats from the table starting from x_offset */
/* output zero for elements outside the table (e.g. negative x_offset) */
/* if delimiters are specified, stop when encountering a delimiter */
t_garray *a;
int n, i, tabpoints, listpoints;
int listsize;
t_atom *atomlist = NULL;
#ifdef USE_GETFLOATWORDS
t_word *vec;
#else
t_float *vec;
#endif
/* Read in the array */
if (!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
pd_error(x, "tab2flist_list: %s: no such array", x->x_arrayname->s_name);
#ifdef USE_GETFLOATWORDS
else if (!garray_getfloatwords(a, &tabpoints, &vec))
#else
else if (!garray_getfloatarray(a, &tabpoints, &vec))
#endif
pd_error(x, "tab2flist_list: %s: bad template", x->x_arrayname->s_name);
else if (x->x_length != 0)
{
if (x->x_length > 0) listpoints = x->x_length;
else listsize = tabpoints; /* when x_length < 0, output the whole table */
listsize = listpoints * sizeof(t_atom);
atomlist = getbytes(listsize);
if (atomlist == NULL)
{
pd_error(x, "tab2flist_list: unable to allocate %lu bytes for list", listsize);
return;
}
else
{
for (n = x->x_offset, i = 0; i < listpoints; ++n)
{
if ((n >= 0) && (n < tabpoints))
{
#ifdef USE_GETFLOATWORDS
SETFLOAT(&atomlist[i], vec[n].w_float);
#else
SETFLOAT(&atomlist[i], vec[n]);
#endif
}
else
{
#ifdef USE_GETFLOATWORDS
SETFLOAT(&atomlist[i], 0);
#else
SETFLOAT(&atomlist[i], 0);
#endif
}
i++;
}
if (x->x_n_delimiters > 0) tab2flist_delimit(x, &listpoints, atomlist);
outlet_list(x->x_listout, &s_list, listpoints, atomlist);
freebytes(atomlist, listsize);
}
}
}
static void tab2flist_delimit(t_tab2flist *x, int *argc, t_atom *argv)
{
/* for each element in argv, check if it matches a delimiter */
/* if so, truncate the list and set the new length */
int i,j, n = *argc;
t_float f;
for (i = 0; i < n; ++i)
{
f = atom_getfloat(&argv[i]);
for (j = 0; j < x->x_n_delimiters; ++j)
{
if (f == x->x_delimiters[j])
{
*argc = i;
return;
}
}
}
}
#ifdef NOWAY
static void tab2flist_list(t_tab2flist *x, t_symbol *s, int argc, t_atom *argv)
{
int i;
/* expect a list of 2 floats for offset and packet length */
/* Check the incoming list for length = 2 */
if (argc != 2)
{
pd_error(x, "tab2flist_list: list must contain exactly two floats (offset, length)");
return;
}
/* Check the incoming list for floatness... */
for (i = 0; i < 2; ++i)
{
if (argv[i].a_type != A_FLOAT)
{
pd_error(x, "tab2flist_list: list must contain exactly two floats (offset, length)");
return;
}
}
/* Read offset and packet size from incoming list */
x->x_offset = argv[0].a_w.w_float;
x->x_length = argv[1].a_w.w_float;
}
#endif
static void tab2flist_float(t_tab2flist *x, t_float f)
{
x->x_offset = f;
}
static void tab2flist_set(t_tab2flist *x, t_symbol *s)
{
x->x_arrayname = s;
}
static void tab2flist_delimiter(t_tab2flist *x, t_symbol *s, int argc, t_atom *argv)
{
int i;
/* expect a list of at least one float for delimiter values */
/* Check the incoming list for floatness... */
for (i = 0; i < argc; ++i)
{
if (argv[i].a_type != A_FLOAT)
{
pd_error(x, "tab2flist_delimiter: list must contain only floats");
return;
}
}
/* allocate storage for the delimiters */
if (x->x_delimiters == NULL) x->x_delimiters = getbytes(argc*sizeof(t_float));
else
x->x_delimiters = resizebytes(x->x_delimiters, x->x_n_delimiters*sizeof(t_float), argc*sizeof(t_float));
if (x->x_delimiters == NULL)
{
pd_error(x, "tab2flist_delimiter can't get %lu bytes for delimiters", argc*sizeof(t_float));
x->x_n_delimiters = 0;
return;
}
x->x_n_delimiters = argc;
for (i = 0; i < argc; ++i)
x->x_delimiters[i] = atom_getfloat(&argv[i]);
}
static void tab2flist_free(t_tab2flist *x)
{
if (x->x_n_delimiters > 0) freebytes(x->x_delimiters, x->x_n_delimiters*sizeof(t_float));
}
static void *tab2flist_new(t_symbol *s)
{
t_tab2flist *x = (t_tab2flist *)pd_new(tab2flist_class);
x->x_listout = outlet_new(&x->x_obj, &s_list);
floatinlet_new(&x->x_obj, &x->x_length);
x->x_offset = x->x_n_delimiters = 0;
x->x_delimiters = NULL;
x->x_length = -1; /* default to output the whole table */
x->x_arrayname = s;
return (x);
}
void tab2flist_setup(void)
{
tab2flist_class = class_new(gensym("tab2flist"), (t_newmethod)tab2flist_new,
(t_method) tab2flist_free, sizeof(t_tab2flist), 0, A_DEFSYM, 0);
class_addbang(tab2flist_class, (t_method)tab2flist_bang);
// class_addlist(tab2flist_class, (t_method)tab2flist_list);
class_addfloat(tab2flist_class, (t_method)tab2flist_float);
class_addmethod(tab2flist_class, (t_method)tab2flist_set, gensym("set"),
A_SYMBOL, 0);
class_addmethod(tab2flist_class, (t_method)tab2flist_delimiter, gensym("delimiter"),
A_GIMME, 0);
}
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