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
|
<?xml version="1.0"?>
<!DOCTYPE ladspa SYSTEM "ladspa-swh.dtd">
<?xml-stylesheet href="ladspa.css" type="text/css"?>
<ladspa>
<global>
<meta name="maker" value="Steve Harris <steve@plugin.org.uk>"/>
<meta name="copyright" value="GPL"/>
<meta name="properties" value="HARD_RT_CAPABLE"/>
<code>
#include "ladspa-util.h"
</code>
</global>
<plugin label="sinCos" id="1881" class="OscillatorPlugin">
<name>Sine + cosine oscillator</name>
<p>This is a simple oscillator that outputs sinewaves with a 90 degree phase shift between them.</p>
<p>The current implementation is very inefficient, but I will improve it later.</p>
<callback event="instantiate"><![CDATA[
fs = (float)s_rate;
phi = 0.0;
last_om = 0.0;
]]></callback>
<callback event="run"><![CDATA[
unsigned long pos;
const double target_om = 2.0 * M_PI * f_clamp(freq, 0.0f, 0.5f) * pow(2.0, f_clamp(pitch, 0.0f, 16.0f)) / fs;
const double om_d = (target_om - last_om) / (double)sample_count;
double om = last_om;
for (pos = 0; pos < sample_count; pos++) {
buffer_write(sine[pos], sin(phi));
buffer_write(cosine[pos], cos(phi));
om += om_d;
phi += om;
}
while (phi > 2.0 * M_PI) {
phi -= 2.0 * M_PI;
}
plugin_data->phi = phi;
plugin_data->last_om = target_om;
]]></callback>
<port label="freq" dir="input" type="control" hint="default_440,sample_rate,logarithmic">
<name>Base frequency (Hz)</name>
<p>The base frequency of the output waves.</p>
<range min="0.000001" max="0.5"/>
</port>
<port label="pitch" dir="input" type="control" hint="default_0">
<name>Pitch offset</name>
<p>The pitch offset of the output waves. Final oscillator frequency is $base + 2^pitch$.</p>
<range min="0" max="8"/>
</port>
<port label="sine" dir="output" type="audio">
<name>Sine output</name>
</port>
<port label="cosine" dir="output" type="audio">
<name>Cosine output</name>
</port>
<instance-data label="phi" type="double" />
<instance-data label="fs" type="float" />
<instance-data label="last_om" type="double" />
</plugin>
</ladspa>
|
