aboutsummaryrefslogtreecommitdiff
path: root/src/iemlib1/sigiem_pow4.c
blob: ae5334cfe1e838f48a22833277e8f0742f46c1d9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.

iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2003 */

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


#include "m_pd.h"
#include "iemlib.h"
#include <math.h>
#include <stdio.h>
#include <string.h>

/* ------------------------ iem_pow4~ ----------------------------- */

static t_class *sigiem_pow4_class;

typedef struct _sigiem_pow4
{
	t_object x_obj;
	float x_exp;
	float x_msi;
} t_sigiem_pow4;

static void sigiem_pow4_ft1(t_sigiem_pow4 *x, t_floatarg f)
{
	x->x_exp = f;
}

static t_int *sigiem_pow4_perform(t_int *w)
{
	t_float *in = (t_float *)(w[1]);
	t_float *out = (t_float *)(w[2]);
	t_sigiem_pow4 *x = (t_sigiem_pow4 *)(w[3]);
	t_float y=x->x_exp;
	t_float f, g;
	int n = (int)(w[4])/4;
	
	while (n--)
	{
		f = *in;
		if(f < 0.01f)
			f = 0.01f;
		else if(f > 1000.0f)
			f = 1000.0f;
		g = log(f);
		f = exp(g*y);
		*out++ = f;
		*out++ = f;
		*out++ = f;
		*out++ = f;
		in += 4;
	}
	return (w+5);
}

static void sigiem_pow4_dsp(t_sigiem_pow4 *x, t_signal **sp)
{
	dsp_add(sigiem_pow4_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, sp[0]->s_n);
}

static void *sigiem_pow4_new(t_floatarg f)
{
	t_sigiem_pow4 *x = (t_sigiem_pow4 *)pd_new(sigiem_pow4_class);

	x->x_exp = f;
	inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
	outlet_new(&x->x_obj, gensym("signal"));
	x->x_msi = 0;
	return (x);
}

void sigiem_pow4_setup(void)
{
	sigiem_pow4_class = class_new(gensym("iem_pow4~"), (t_newmethod)sigiem_pow4_new, 0,
				 sizeof(t_sigiem_pow4), 0, A_DEFFLOAT, 0);
	class_addcreator((t_newmethod)sigiem_pow4_new, gensym("icot~"), 0);
	CLASS_MAINSIGNALIN(sigiem_pow4_class, t_sigiem_pow4, x_msi);
	class_addmethod(sigiem_pow4_class, (t_method)sigiem_pow4_dsp, gensym("dsp"), 0);
	class_addmethod(sigiem_pow4_class, (t_method)sigiem_pow4_ft1, gensym("ft1"), A_FLOAT, 0);
	class_sethelpsymbol(sigiem_pow4_class, gensym("iemhelp/help-iem_pow4~"));
}