/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.

iem_tab written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2009 */


#include "m_pd.h"
#include "iemlib.h"
#include "iem_tab.h"


/* -------------------------- tab_min_max ------------------------------ */

typedef struct _tab_min_max
{
  t_object  x_obj;
  int       x_size_src1;
  int       x_offset_src1;
  iemarray_t   *x_beg_mem_src1;
  t_symbol  *x_sym_scr1;
  void      *x_bang_out;
  void      *x_min_out;
  void      *x_max_out;
} t_tab_min_max;

static t_class *tab_min_max_class;

static void tab_min_max_src(t_tab_min_max *x, t_symbol *s)
{
  x->x_sym_scr1 = s;
}

static void tab_min_max_bang(t_tab_min_max *x)
{
  int i, n;
  int ok_src;
  iemarray_t *vec_src;
  t_float min=1.0e37, max=-1.0e37;

  ok_src = iem_tab_check_arrays(gensym("tab_min_max"), x->x_sym_scr1, &x->x_beg_mem_src1, &x->x_size_src1, 0);

  if(ok_src)
  {
    n = x->x_size_src1;
    vec_src = x->x_beg_mem_src1;
    if(n)
    {
      for(i=0; i<n; i++)
      {
        if(iemarray_getfloat(vec_src, i) > max)
          max = iemarray_getfloat(vec_src, i);
        if(iemarray_getfloat(vec_src, i) < min)
          min = iemarray_getfloat(vec_src, i);
      }
      outlet_float(x->x_max_out, max);
      outlet_float(x->x_min_out, min);
      outlet_bang(x->x_bang_out);
    }
  }
}

static void tab_min_max_list(t_tab_min_max *x, t_symbol *s, int argc, t_atom *argv)
{
  int beg_src;
  int i, n;
  int ok_src;
  iemarray_t *vec_src;
  t_float min=1.0e37, max=-1.0e37;

  if((argc >= 2) &&
    IS_A_FLOAT(argv,0) &&
    IS_A_FLOAT(argv,1))
  {
    beg_src = (int)atom_getintarg(0, argc, argv);
    n = (int)atom_getintarg(1, argc, argv);
    if(beg_src < 0)
      beg_src = 0;
    if(n < 0)
      n = 0;

    ok_src = iem_tab_check_arrays(gensym("tab_min_max"), x->x_sym_scr1, &x->x_beg_mem_src1, &x->x_size_src1, beg_src+n);

    if(ok_src)
    {
      vec_src = x->x_beg_mem_src1 + beg_src;
      if(n)
      {
        for(i=0; i<n; i++)
        {
          if(iemarray_getfloat(vec_src, i) > max)
            max = iemarray_getfloat(vec_src, i);
          if(iemarray_getfloat(vec_src, i) < min)
            min = iemarray_getfloat(vec_src, i);
        }
        outlet_float(x->x_max_out, max);
        outlet_float(x->x_min_out, min);
        outlet_bang(x->x_bang_out);
      }
    }
  }
  else
  {
    post("tab_min_max-ERROR: list need 2 float arguments:");
    post("  source_offset + number_of_samples_to_calc_min_max");
  }
}

static void tab_min_max_free(t_tab_min_max *x)
{
}

static void *tab_min_max_new(t_symbol *s, int argc, t_atom *argv)
{
  t_tab_min_max *x = (t_tab_min_max *)pd_new(tab_min_max_class);
  t_symbol  *src;

  if((argc >= 1) &&
    IS_A_SYMBOL(argv,0))
  {
    src = (t_symbol *)atom_getsymbolarg(0, argc, argv);
  }
  else
  {
    post("tab_min_max-ERROR: need 1 symbol argument:");
    post("  source_array_name");
    return(0);
  }

  x->x_sym_scr1 = src;
  x->x_bang_out = outlet_new(&x->x_obj, &s_bang);
  x->x_min_out = outlet_new(&x->x_obj, &s_float);
  x->x_max_out = outlet_new(&x->x_obj, &s_float);
  return(x);
}

void tab_min_max_setup(void)
{
  tab_min_max_class = class_new(gensym("tab_min_max"), (t_newmethod)tab_min_max_new, (t_method)tab_min_max_free,
    sizeof(t_tab_min_max), 0, A_GIMME, 0);
  class_addbang(tab_min_max_class, (t_method)tab_min_max_bang);
  class_addlist(tab_min_max_class, (t_method)tab_min_max_list);
  class_addmethod(tab_min_max_class, (t_method)tab_min_max_src, gensym("src"), A_DEFSYMBOL, 0);
  class_addmethod(tab_min_max_class, (t_method)tab_min_max_src, gensym("src1"), A_DEFSYMBOL, 0);
//  class_sethelpsymbol(tab_min_max_class, gensym("iemhelp2/tab_min_max-help"));
}
