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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/* 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 - 2005 */
#include "m_pd.h"
#include "iemlib.h"
#include <math.h>
/* ---------------- rvu~ - simple peak&rms-vu-meter. ----------------- */
typedef struct _rvu_tilde
{
t_object x_obj;
void *x_clock_metro;
t_float x_metro_time;
t_float x_sum_rms;
t_float x_old_rms;
t_float x_rcp;
t_float x_sr;
t_float x_release_time;
t_float x_c1;
int x_started;
t_float x_msi;
} t_rvu_tilde;
t_class *rvu_tilde_class;
static void rvu_tilde_tick_metro(t_rvu_tilde *x);
static void rvu_tilde_reset(t_rvu_tilde *x)
{
outlet_float(x->x_obj.ob_outlet, -99.9f);
x->x_sum_rms = 0.0f;
x->x_old_rms = 0.0f;
clock_delay(x->x_clock_metro, x->x_metro_time);
}
static void rvu_tilde_stop(t_rvu_tilde *x)
{
clock_unset(x->x_clock_metro);
x->x_started = 0;
}
static void rvu_tilde_start(t_rvu_tilde *x)
{
clock_delay(x->x_clock_metro, x->x_metro_time);
x->x_started = 1;
}
static void rvu_tilde_float(t_rvu_tilde *x, t_floatarg f)
{
if(f == 0.0f)
{
clock_unset(x->x_clock_metro);
x->x_started = 0;
}
else
{
clock_delay(x->x_clock_metro, x->x_metro_time);
x->x_started = 1;
}
}
static void rvu_tilde_t_release(t_rvu_tilde *x, t_floatarg release_time)
{
if(release_time <= 5.0f)
release_time = 5.0f;
x->x_release_time = release_time;
x->x_c1 = exp(-2.0f*x->x_metro_time/x->x_release_time);
}
static void rvu_tilde_t_metro(t_rvu_tilde *x, t_floatarg metro_time)
{
if(metro_time <= 5.0f)
metro_time = 5.0f;
x->x_metro_time = metro_time;
x->x_c1 = exp(-2.0f*x->x_metro_time/x->x_release_time);
x->x_rcp = 1.0f/(x->x_sr*x->x_metro_time);
}
static t_int *rvu_tilde_perform(t_int *w)
{
t_float *in = (t_float *)(w[1]);
t_rvu_tilde *x = (t_rvu_tilde *)(w[2]);
int n = (int)(w[3]);
t_float pow, sum=x->x_sum_rms;
int i;
if(x->x_started)
{
for(i=0; i<n; i++)
{
sum += in[i]*in[i];
}
x->x_sum_rms = sum;
}
return(w+4);
}
static void rvu_tilde_dsp(t_rvu_tilde *x, t_signal **sp)
{
x->x_sr = 0.001*(t_float)sp[0]->s_sr;
x->x_rcp = 1.0f/(x->x_sr*x->x_metro_time);
dsp_add(rvu_tilde_perform, 3, sp[0]->s_vec, x, sp[0]->s_n);
clock_delay(x->x_clock_metro, x->x_metro_time);
}
static void rvu_tilde_tick_metro(t_rvu_tilde *x)
{
t_float dbr, cur_rms, c1=x->x_c1;
cur_rms = (1.0f - c1)*x->x_sum_rms*x->x_rcp + c1*x->x_old_rms;
/* NAN protect */
if(IEM_DENORMAL(cur_rms))
cur_rms = 0.0f;
if(cur_rms <= 0.0000000001f)
dbr = -99.9f;
else if(cur_rms > 1000000.0f)
{
dbr = 60.0f;
x->x_old_rms = 1000000.0f;
}
else
dbr = 4.3429448195f*log(cur_rms);
x->x_sum_rms = 0.0f;
x->x_old_rms = cur_rms;
outlet_float(x->x_obj.ob_outlet, dbr);
clock_delay(x->x_clock_metro, x->x_metro_time);
}
static void rvu_tilde_ff(t_rvu_tilde *x)
{
clock_free(x->x_clock_metro);
}
static void *rvu_tilde_new(t_floatarg metro_time, t_floatarg release_time)
{
t_rvu_tilde *x=(t_rvu_tilde *)pd_new(rvu_tilde_class);
if(metro_time <= 0.0f)
metro_time = 300.0f;
if(metro_time <= 5.0f)
metro_time = 5.0f;
if(release_time <= 0.0f)
release_time = 300.0f;
if(release_time <= 5.0f)
release_time = 5.0f;
x->x_metro_time = metro_time;
x->x_release_time = release_time;
x->x_c1 = exp(-2.0f*x->x_metro_time/x->x_release_time);
x->x_sum_rms = 0.0f;
x->x_old_rms = 0.0f;
x->x_sr = 44.1f;
x->x_rcp = 1.0f/(x->x_sr*x->x_metro_time);
x->x_clock_metro = clock_new(x, (t_method)rvu_tilde_tick_metro);
x->x_started = 1;
outlet_new(&x->x_obj, &s_float);
x->x_msi = 0.0f;
return(x);
}
void rvu_tilde_setup(void)
{
rvu_tilde_class = class_new(gensym("rvu~"), (t_newmethod)rvu_tilde_new,
(t_method)rvu_tilde_ff, sizeof(t_rvu_tilde), 0,
A_DEFFLOAT, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(rvu_tilde_class, t_rvu_tilde, x_msi);
class_addmethod(rvu_tilde_class, (t_method)rvu_tilde_dsp, gensym("dsp"), 0);
class_addfloat(rvu_tilde_class, rvu_tilde_float);
class_addmethod(rvu_tilde_class, (t_method)rvu_tilde_reset, gensym("reset"), 0);
class_addmethod(rvu_tilde_class, (t_method)rvu_tilde_start, gensym("start"), 0);
class_addmethod(rvu_tilde_class, (t_method)rvu_tilde_stop, gensym("stop"), 0);
class_addmethod(rvu_tilde_class, (t_method)rvu_tilde_t_release, gensym("t_release"), A_FLOAT, 0);
class_addmethod(rvu_tilde_class, (t_method)rvu_tilde_t_metro, gensym("t_metro"), A_FLOAT, 0);
class_sethelpsymbol(rvu_tilde_class, gensym("iemhelp/help-rvu~"));
}
|
