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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 "util/waveguide_nl.h"
#define RUN_WG(n, junct_a, junct_b) waveguide_nl_process(w[n], junct_a - out[n*2+1], junct_b - out[n*2], out+n*2, out+n*2+1)
</code>
</global>
<plugin label="gong" id="1424" class="SimulatorPlugin,GeneratorPlugin">
<name>Gong model</name>
<p>A physical model of a metal gong.</p>
<p>Based on Josep Comajuncosas' gong explorer, which was built in Sync Modular, it uses 8 linear waveguides with nonlinear filters to model the gong surface.</p>
<callback event="instantiate"><![CDATA[
/* Max delay length for inner waveguides */
maxsize_i = (float)s_rate * 0.03643242f;
/* Max delay length for outer waveguides */
maxsize_o = (float)s_rate * 0.05722782f;
/* The waveguide structures */
w = malloc(8 * sizeof(waveguide_nl *));
w[0] = waveguide_nl_new(maxsize_i, 0.5, 0.0f, 0.0f);
w[1] = waveguide_nl_new(maxsize_i, 0.5, 0.0f, 0.0f);
w[2] = waveguide_nl_new(maxsize_i, 0.5, 0.0f, 0.0f);
w[3] = waveguide_nl_new(maxsize_i, 0.5, 0.0f, 0.0f);
w[4] = waveguide_nl_new(maxsize_o, 0.5, 0.0f, 0.0f);
w[5] = waveguide_nl_new(maxsize_o, 0.5, 0.0f, 0.0f);
w[6] = waveguide_nl_new(maxsize_o, 0.5, 0.0f, 0.0f);
w[7] = waveguide_nl_new(maxsize_o, 0.5, 0.0f, 0.0f);
/* Buffers to hold the currect deflections */
out = calloc(32, sizeof(float));
]]></callback>
<callback event="activate"><![CDATA[
unsigned int i;
for (i = 0; i < 8; i++) {
waveguide_nl_reset(w[i]);
}
]]></callback>
<callback event="run"><![CDATA[
unsigned long pos;
/* The a coef of the inner lowpass */
const float lpi = 1.0f - damp_i * 0.1423f;
/* The a coef of the outer lowpass */
const float lpo = 1.0f - damp_o * 0.19543f;
/* Set the parameters of the waveguides */
waveguide_nl_set_delay(w[0], maxsize_i * scale0);
waveguide_nl_set_ap(w[0], apa0, apb0);
waveguide_nl_set_delay(w[1], maxsize_i * scale1);
waveguide_nl_set_ap(w[1], apa1, apb1);
waveguide_nl_set_delay(w[2], maxsize_i * scale2);
waveguide_nl_set_ap(w[2], apa2, apb2);
waveguide_nl_set_delay(w[3], maxsize_i * scale3);
waveguide_nl_set_ap(w[3], apa3, apb3);
waveguide_nl_set_delay(w[4], maxsize_o * scale4);
waveguide_nl_set_ap(w[4], apa4, apb4);
waveguide_nl_set_delay(w[5], maxsize_o * scale5);
waveguide_nl_set_ap(w[5], apa5, apb5);
waveguide_nl_set_delay(w[6], maxsize_o * scale6);
waveguide_nl_set_ap(w[6], apa6, apb6);
waveguide_nl_set_delay(w[7], maxsize_o * scale7);
waveguide_nl_set_ap(w[7], apa7, apb7);
for (pos=0; pos<4; pos++) {
waveguide_nl_set_fc(w[pos], lpi);
}
for (; pos<8; pos++) {
waveguide_nl_set_fc(w[pos], lpo);
}
for (pos = 0; pos < sample_count; pos++) {
/* Calcualte the deflections at the wavejunctions
alpha is the centre, beta is north, gamma is east,
delta is south and epsilon is west */
const float alpha = (out[0] + out[2] + out[4] + out[6]) * 0.5f
+ input[pos];
const float beta = (out[1] + out[9] + out[14]) * 0.666666666666f;
const float gamma = (out[3] + out[8] + out[11]) * 0.666666666666f;
const float delta = (out[5] + out[10] + out[13]) * 0.666666666666f;
const float epsilon = (out[7] + out[12] + out[15]) * 0.666666666666f;
/* Inject the energy at the junctions + reflections into the
waveguides (the macro gives the reflection calcs) */
RUN_WG(0, beta, alpha);
RUN_WG(1, gamma, alpha);
RUN_WG(2, delta, alpha);
RUN_WG(3, epsilon, alpha);
RUN_WG(4, beta, gamma);
RUN_WG(5, gamma, delta);
RUN_WG(6, delta, epsilon);
RUN_WG(7, epsilon, beta);
buffer_write(output[pos], (1.0f - micpos) * alpha + micpos * delta);
}
]]></callback>
<callback event="cleanup"><![CDATA[
unsigned int i;
for (i = 0; i < 8; i++) {
waveguide_nl_free(plugin_data->w[i]);
}
free(plugin_data->w);
free(plugin_data->out);
]]></callback>
<port label="damp_i" dir="input" type="control" hint="default_middle">
<name>Inner damping</name>
<p>Controls the degree of damping in the centre of the gong.</p>
<range min="0" max="1"/>
</port>
<port label="damp_o" dir="input" type="control" hint="default_middle">
<name>Outer damping</name>
<p>Controls the degree of damping on the edge of the gong.</p>
<range min="0" max="1"/>
</port>
<port label="micpos" dir="input" type="control" hint="default_low">
<name>Mic position</name>
<p>Controls the vertical position of the "microphone", 0 is the centre and 1 is the edge.</p>
<range min="0" max="1"/>
</port>
<port label="scale0" dir="input" type="control" hint="default_middle">
<name>Inner size 1</name>
<p>The size of the upper, inner waveguide.</p>
<range min="0" max="1"/>
</port>
<port label="apa0" dir="input" type="control" hint="default_middle">
<name>Inner stiffness 1 +</name>
<p>The stiffness of the gong against deflections in the positive direction.</p>
<range min="0" max="1"/>
</port>
<port label="apb0" dir="input" type="control" hint="default_middle">
<name>Inner stiffness 1 -</name>
<p>The stiffness of the gong against deflections in the negative direction.</p>
<range min="0" max="1"/>
</port>
<port label="scale1" dir="input" type="control" hint="default_middle">
<name>Inner size 2</name>
<p>The size of the right, inner waveguide.</p>
<range min="0" max="1"/>
</port>
<port label="apa1" dir="input" type="control" hint="default_middle">
<name>Inner stiffness 2 +</name>
<p>The stiffness of the gong against deflections in the positive direction.</p>
<range min="0" max="1"/>
</port>
<port label="apb1" dir="input" type="control" hint="default_middle">
<name>Inner stiffness 2 -</name>
<p>The stiffness of the gong against deflections in the negative direction.</p>
<range min="0" max="1"/>
</port>
<port label="scale2" dir="input" type="control" hint="default_middle">
<name>Inner size 3</name>
<p>The size of the lower, inner waveguide.</p>
<range min="0" max="1"/>
</port>
<port label="apa2" dir="input" type="control" hint="default_middle">
<name>Inner stiffness 3 +</name>
<p>The stiffness of the gong against deflections in the positive direction.</p>
<range min="0" max="1"/>
</port>
<port label="apb2" dir="input" type="control" hint="default_middle">
<name>Inner stiffness 3 -</name>
<p>The stiffness of the gong against deflections in the negative direction.</p>
<range min="0" max="1"/>
</port>
<port label="scale3" dir="input" type="control" hint="default_middle">
<name>Inner size 4</name>
<p>The size of the left, inner waveguide.</p>
<range min="0" max="1"/>
</port>
<port label="apa3" dir="input" type="control" hint="default_middle">
<name>Inner stiffness 4 +</name>
<p>The stiffness of the gong against deflections in the positive direction.</p>
<range min="0" max="1"/>
</port>
<port label="apb3" dir="input" type="control" hint="default_middle">
<name>Inner stiffness 4 -</name>
<p>The stiffness of the gong against deflections in the negative direction.</p>
<range min="0" max="1"/>
</port>
<port label="scale4" dir="input" type="control" hint="default_middle">
<name>Outer size 1</name>
<p>The size of the upper right, outer waveguide.</p>
<range min="0" max="1"/>
</port>
<port label="apa4" dir="input" type="control" hint="default_middle">
<name>Outer stiffness 1 +</name>
<p>The stiffness of the gong against deflections in the positive direction.</p>
<range min="0" max="1"/>
</port>
<port label="apb4" dir="input" type="control" hint="default_middle">
<name>Outer stiffness 1 -</name>
<p>The stiffness of the gong against deflections in the negative direction.</p>
<range min="0" max="1"/>
</port>
<port label="scale5" dir="input" type="control" hint="default_middle">
<name>Outer size 2</name>
<p>The size of the lower right, outer waveguide.</p>
<range min="0" max="1"/>
</port>
<port label="apa5" dir="input" type="control" hint="default_middle">
<name>Outer stiffness 2 +</name>
<p>The stiffness of the gong against deflections in the positive direction.</p>
<range min="0" max="1"/>
</port>
<port label="apb5" dir="input" type="control" hint="default_middle">
<name>Outer stiffness 2 -</name>
<p>The stiffness of the gong against deflections in the negative direction.</p>
<range min="0" max="1"/>
</port>
<port label="scale6" dir="input" type="control" hint="default_middle">
<name>Outer size 3</name>
<p>The size of the lower left, outer waveguide.</p>
<range min="0" max="1"/>
</port>
<port label="apa6" dir="input" type="control" hint="default_middle">
<name>Outer stiffness 3 +</name>
<p>The stiffness of the gong against deflections in the positive direction.</p>
<range min="0" max="1"/>
</port>
<port label="apb6" dir="input" type="control" hint="default_middle">
<name>Outer stiffness 3 -</name>
<p>The stiffness of the gong against deflections in the negative direction.</p>
<range min="0" max="1"/>
</port>
<port label="scale7" dir="input" type="control" hint="default_middle">
<name>Outer size 4</name>
<p>The size of the upper left, outer waveguide.</p>
<range min="0" max="1"/>
</port>
<port label="apa7" dir="input" type="control" hint="default_middle">
<name>Outer stiffness 4 +</name>
<p>The stiffness of the gong against deflections in the positive direction.</p>
<range min="0" max="1"/>
</port>
<port label="apb7" dir="input" type="control" hint="default_middle">
<name>Outer stiffness 4 -</name>
<p>The stiffness of the gong against deflections in the negative direction.</p>
<range min="0" 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="w" type="waveguide_nl **" />
<instance-data label="out" type="float *" />
<instance-data label="maxsize_i" type="int" />
<instance-data label="maxsize_o" type="int" />
</plugin>
</ladspa>
|
