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<?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"
int refcount;
LADSPA_Data *sin_tbl, *tri_tbl, *saw_tbl, *squ_tbl;
long sample_rate;
</code>
</global>
<plugin label="ringmod_2i1o" id="1188" class="ModulatorPlugin">
<name>Ringmod with two inputs</name>
<p>This is a simple 2 input ring modulator.</p>
<p>It is important that the modulator input is bounded to (-1, +1), otherwise you will get rubbish on the output.</p>
<callback event="run">
unsigned long pos;
float tmpa = depth * 0.5f;
float tmpb = 2.0f - depth;
for (pos = 0; pos < sample_count; pos++) {
buffer_write(output[pos], input[pos] * (tmpa * modulator[pos] + tmpb));
}
</callback>
<port label="depth" dir="input" type="control" hint="default_0">
<name>Modulation depth (0=none, 1=AM, 2=RM)</name>
<range min="0" max="2"/>
</port>
<port label="input" dir="input" type="audio">
<name>Input</name>
<p>This is the audio input.</p>
</port>
<port label="modulator" dir="input" type="audio" hint="default_0">
<name>Modulator</name>
<range min="-1" max="+1"/>
<p>This is the modulator input.</p>
</port>
<port label="output" dir="output" type="audio">
<name>Output</name>
</port>
</plugin>
<plugin label="ringmod_1i1o1l" id="1189" class="ModulatorPlugin">
<name>Ringmod with LFO</name>
<p>This is a simple ring modulator and LFO.</p>
<callback event="instantiate">
long i;
sample_rate = s_rate;
if (refcount++ == 0) {
sin_tbl = malloc(sizeof(LADSPA_Data) * sample_rate);
for (i = 0; i < sample_rate; i++) {
sin_tbl[i] = sin(i * 2 * M_PI / sample_rate);
}
tri_tbl = malloc(sizeof(LADSPA_Data) * sample_rate);
for (i = 0; i < sample_rate; i++) {
tri_tbl[i] = acos(cos(i * 2 * M_PI / sample_rate)) / M_PI * 2 - 1;
}
squ_tbl = malloc(sizeof(LADSPA_Data) * sample_rate);
for (i = 0; i < sample_rate; i++) {
squ_tbl[i] = (i < sample_rate/2) ? 1 : -1;
}
saw_tbl = malloc(sizeof(LADSPA_Data) * sample_rate);
for (i = 0; i < sample_rate; i++) {
saw_tbl[i] = ((2.0 * i) - (float)sample_rate) / (float)sample_rate;
}
}
offset = 0;
</callback>
<callback event="activate">
offset = 0;
</callback>
<callback event="cleanup">
plugin_data = plugin_data;
if (--refcount == 0) {
free(sin_tbl);
free(tri_tbl);
free(squ_tbl);
free(saw_tbl);
}
</callback>
<callback event="run">
LADSPA_Data scale = fabs(sin) + fabs(tri) +
fabs(saw) + fabs(squ);
int o;
unsigned long pos;
// Rescale to more useful value
const float depth = depthp * 0.5f;
if (scale == 0.0) {
scale = 1.0;
}
for (pos = 0; pos < sample_count; pos++) {
o = f_round(offset);
buffer_write(output[pos], input[pos] *
(depth * (((sin / scale) * sin_tbl[o]) +
((tri / scale) * tri_tbl[o]) +
((saw / scale) * saw_tbl[o]) +
((squ / scale) * squ_tbl[o])) +
(1.0f - depth)));
offset += freq;
if (offset > sample_rate) {
offset -= sample_rate;
}
}
plugin_data->offset = offset;
</callback>
<port label="depthp" dir="input" type="control" hint="default_0">
<name>Modulation depth (0=none, 1=AM, 2=RM)</name>
<range min="0" max="2"/>
</port>
<port label="freq" dir="input" type="control" hint="default_440">
<name>Frequency (Hz)</name>
<range min="1" max="1000"/>
</port>
<port label="sin" dir="input" type="control" hint="default_1">
<name>Sine level</name>
<range min="-1" max="+1"/>
</port>
<port label="tri" dir="input" type="control" hint="default_0">
<name>Triangle level</name>
<range min="-1" max="+1"/>
</port>
<port label="saw" dir="input" type="control" hint="default_0">
<name>Sawtooth level</name>
<range min="-1" max="+1"/>
</port>
<port label="squ" dir="input" type="control" hint="default_0">
<name>Square level</name>
<range min="-1" max="+1"/>
</port>
<port label="input" dir="input" type="audio">
<name>Input</name>
</port>
<port label="output" dir="output" type="audio">
<name>Output</name>
</port>
<instance-data label="offset" type="LADSPA_Data"/>
</plugin>
</ladspa>
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