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
|
/*
* wavefolder~ - modulation of triangle->sawtooth wave and PWM generation from modulated
* tri-saw wave.
* Copyright (c) 2012, Dr Edward Kelly <morph_2016@yahoo.co.uk>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
*
* provided with the distribution.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "m_pd.h"
#include <math.h>
#define _limit 0.99999
static t_class *wavefolder_tilde_class;
typedef struct _wavefolder_tilde {
t_object x_obj;
t_float token, bipolar;
// t_float token, debug, safety;
t_outlet *folded, *pulse;
} t_wavefolder_tilde;
static inline float saturate( float input ) { //clamp without branching
float x1 = fabsf( input + _limit );
float x2 = fabsf( input - _limit );
return 0.5 * (x1 - x2);
}
t_int *wavefolder_tilde_perform(t_int *w) {
t_wavefolder_tilde *x = (t_wavefolder_tilde *)(w[1]);
t_sample *in = (t_sample *)(w[2]);
t_sample *thresh = (t_sample *)(w[3]);
t_sample *pthresh = (t_sample *)(w[4]);
t_sample *out = (t_sample *)(w[5]);
t_sample *pout = (t_sample *)(w[6]);
int n = (int)(w[7]);
t_float insample = 0;
t_float outsample = 0;
t_float thsample = 0;
t_float pthsample = 0;
t_float reciprocal = 0;
t_float remainder = 0;
t_float remciprocal = 0;
while (n--)
{
insample = *in++;
thsample = saturate(*thresh++);
thsample = thsample * 0.5 + 0.5;
pthsample = *pthresh++;
reciprocal = 1 / thsample;
remainder = 1 - thsample;
remciprocal = 1 / remainder;
if(x->bipolar != 0) {
outsample = *out++ = (insample < thsample ? insample * reciprocal : 1 - ((insample - thsample) * remciprocal)) * 2 - 1;
}
else if(x->bipolar == 0) {
outsample = *out++ = insample < thsample ? insample * reciprocal : 1 - ((insample - thsample) * remciprocal);
}
if(x->bipolar == 0) {
pthsample = pthsample * 0.5 + 0.5;
*pout++ = outsample > pthsample ? 1 : 0;
}
else if(x->bipolar != 0) {
*pout++ = outsample > pthsample ? 1 : -1;
}
}
return (w+8);
}
void wavefolder_tilde_bipolar(t_wavefolder_tilde *x, t_floatarg f) {
x->bipolar = f;
}
void wavefolder_tilde_dsp(t_wavefolder_tilde *x, t_signal **sp) {
dsp_add(wavefolder_tilde_perform, 7, x, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec, sp[4]->s_vec, sp[0]->s_n);
}
void *wavefolder_tilde_new(t_floatarg f) {
t_wavefolder_tilde *x = (t_wavefolder_tilde *)pd_new(wavefolder_tilde_class);
inlet_new (&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
inlet_new (&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
// floatinlet_new (&x->x_obj, &x->threshold);
outlet_new(&x->x_obj, &s_signal);
outlet_new(&x->x_obj, &s_signal);
return (void *)x;
}
void wavefolder_tilde_setup(void) {
wavefolder_tilde_class = class_new(gensym("wavefolder~"),
(t_newmethod)wavefolder_tilde_new,
0, sizeof(t_wavefolder_tilde),
CLASS_DEFAULT, A_DEFFLOAT, 0);
post("~~~~~~~~~~~~~~~>wavefolder~");
post("~~~>by Ed Kelly, 2012");
class_addmethod(wavefolder_tilde_class,
(t_method)wavefolder_tilde_dsp, gensym("dsp"), 0);
CLASS_MAINSIGNALIN(wavefolder_tilde_class, t_wavefolder_tilde, token);
class_addmethod(wavefolder_tilde_class, (t_method)wavefolder_tilde_bipolar, gensym("bipolar"), A_DEFFLOAT, 0);
// class_addmethod(wavefolder_tilde_class, (t_method)wavefolder_tilde_mode, gensym("mode"), A_DEFFLOAT, 0);
}
|
