diode_1185.xml

<?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 &lt;steve@plugin.org.uk&gt;"/>
		<meta name="copyright" value="GPL"/>
		<meta name="properties" value="HARD_RT_CAPABLE"/>
	</global>

	<plugin label="diode" id="1185" class="DistortionPlugin">
		<name>Diode Processor</name>
		<p>Mangles the signal as if it had been passed through a diode rectifier network.</p>
		<p>You should probably follow this with a DC offset remover, unless you want the offset.</p>

		<callback event="run"><![CDATA[
unsigned long pos;

if (mode >= 0.0f && mode < 1.0f) {
	for (pos = 0; pos < sample_count; pos++) {
		buffer_write(output[pos], ((1.0f-mode) * input[pos]) +
		 (mode * (input[pos] > 0.0f ? input[pos] : 0.0f)));
	}
} else if (mode >= 1.0f && mode < 2.0f) {
	float fac = mode - 1.0f;
	for (pos = 0; pos < sample_count; pos++) {
		buffer_write(output[pos], ((1.0f-fac) * (input[pos] > 0 ?
		 input[pos] : 0.0)) + (fac * fabs(input[pos])));
	}
} else if (mode >= 2) {
	float fac = mode < 3 ? mode - 2 : 1.0;
	for (pos = 0; pos < sample_count; pos++) {
		buffer_write(output[pos], (1.0-fac) * fabs(input[pos]));
	}
} else {
	for (pos = 0; pos < sample_count; pos++) {
		buffer_write(output[pos], input[pos]);
	}
}
		]]></callback>

		<port label="mode" dir="input" type="control" hint="default_0">
			<name>Mode (0 for none, 1 for half wave, 2 for full wave)</name>
			<p>The mode parameter is continuously variable from thru to half-wave rectification to full-wave to silence.</p>
			<range min="0" max="3"/>
		</port>

		<port label="input" dir="input" type="audio">
			<name>Input</name>
		</port>

		<port label="output" dir="output" type="audio">
			<name>Output</name>
		</port>
	</plugin>
</ladspa>