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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"
#include "util/biquad.h"
</code>
</global>
<plugin label="lcrDelay" id="1436" class="DelayPlugin">
<name>L/C/R Delay</name>
<p>This is a left/centre/right delay with feedback, based on the one in the Korg Trinity. Requested by Marek Peteraj.</p>
<callback event="instantiate"><![CDATA[
int buffer_size = 32768;
fs = s_rate;
while (buffer_size < fs * 2.7f) {
buffer_size *= 2;
}
buffer = calloc(buffer_size, sizeof(LADSPA_Data));
buffer_mask = buffer_size - 1;
buffer_pos = 0;
last_ll = 0.0f;
last_cl = 0.0f;
last_rl = 0.0f;
last_ld = 0.0f;
last_cd = 0.0f;
last_rd = 0.0f;
filters = malloc(2 * sizeof(biquad));
]]></callback>
<callback event="activate"><![CDATA[
memset(buffer, 0, (buffer_mask + 1) * sizeof(LADSPA_Data));
last_ll = 0.0f;
last_cl = 0.0f;
last_rl = 0.0f;
last_ld = 0.0f;
last_cd = 0.0f;
last_rd = 0.0f;
biquad_init(filters);
biquad_init(filters + 1);
]]></callback>
<callback event="cleanup"><![CDATA[
free(plugin_data->filters);
free(plugin_data->buffer);
]]></callback>
<callback event="run"><![CDATA[
unsigned long pos;
const float sc_r = 1.0f / (float)sample_count;
const float spr_t = 0.5f + spread * 0.01f;
const float spr_o = 0.5f - spread * 0.01f;
float fb = feedback * 0.01f;
float ll, cl, rl, ld, cd, rd;
float ll_d, cl_d, rl_d, ld_d, cd_d, rd_d;
float left, right;
float fbs; /* Feedback signal */
if (fb < -0.99f) {
fb = -0.99f;
} else if (fb > 0.99f) {
fb = 0.99f;
}
ls_set_params(filters, fs * 0.0001f * powf(2.0f, low_d * 0.12f),
-0.5f * low_d, 0.5f, fs);
hs_set_params(filters + 1, fs * (0.41f - 0.0001f *
powf(2.0f, high_d * 0.12f)), -70.0f, 0.9f, fs);
ll = last_ll; /* Start value of Left Level */
ll_d = (llev * 0.01f - last_ll) * sc_r; /* Delta for Left Level */
cl = last_cl;
cl_d = (clev * 0.01f - last_cl) * sc_r;
rl = last_rl;
rl_d = (rlev * 0.01f - last_rl) * sc_r;
ld = last_ld;
ld_d = (ldel * fs * 0.001f - last_ld) * sc_r;
cd = last_cd;
cd_d = (cdel * fs * 0.001f - last_cd) * sc_r;
rd = last_rd;
rd_d = (rdel * fs * 0.001f - last_rd) * sc_r;
for (pos = 0; pos < sample_count; pos++) {
/* Increment linear interpolators */
ll += ll_d;
rl += rl_d;
cl += cl_d;
ld += ld_d;
rd += rd_d;
cd += cd_d;
/* Write input into delay line */
buffer[buffer_pos] = in_l[pos] + in_r[pos];
/* Add feedback, must be done afterwards for case where C delay = 0 */
fbs = buffer[(buffer_pos - f_round(cd)) & buffer_mask] * fb;
fbs = flush_to_zero(fbs);
fbs = biquad_run(filters, fbs);
fbs = biquad_run(filters + 1, fbs);
buffer[buffer_pos] += fbs;
/* Outputs from left and right delay beffers + centre mix */
left = buffer[(buffer_pos - f_round(ld)) & buffer_mask] * ll +
buffer[(buffer_pos - f_round(cd)) & buffer_mask] * cl;
right = buffer[(buffer_pos - f_round(rd)) & buffer_mask] * rl +
buffer[(buffer_pos - f_round(cd)) & buffer_mask] * cl;
/* Left and right channel outs */
buffer_write(out_l[pos], in_l[pos] * (1.0f - wet) +
(left * spr_t + right * spr_o) * wet);
buffer_write(out_r[pos], in_r[pos] * (1.0f - wet) +
(left * spr_o + right * spr_t) * wet);
buffer_pos = (buffer_pos + 1) & buffer_mask;
}
plugin_data->last_ll = ll;
plugin_data->last_cl = cl;
plugin_data->last_rl = rl;
plugin_data->last_ld = ld;
plugin_data->last_cd = cd;
plugin_data->last_rd = rd;
plugin_data->buffer_pos = buffer_pos;
]]></callback>
<port label="ldel" dir="input" type="control" hint="default_low">
<name>L delay (ms)</name>
<p>The delay of the left output in milliseconds.</p>
<range min="0" max="2700"/>
</port>
<port label="llev" dir="input" type="control" hint="default_middle">
<name>L level</name>
<p>The level of the left output.</p>
<range min="0" max="50"/>
</port>
<port label="cdel" dir="input" type="control" hint="default_low">
<name>C delay (ms)</name>
<p>The delay of the centre output in milliseconds.</p>
<range min="0" max="2700"/>
</port>
<port label="clev" dir="input" type="control" hint="default_middle">
<name>C level</name>
<p>The level of the centre output.</p>
<range min="0" max="50"/>
</port>
<port label="rdel" dir="input" type="control" hint="default_low">
<name>R delay (ms)</name>
<p>The delay of the right output in milliseconds.</p>
<range min="0" max="2700"/>
</port>
<port label="rlev" dir="input" type="control" hint="default_middle">
<name>R level</name>
<p>The level of the right output.</p>
<range min="0" max="50"/>
</port>
<port label="feedback" dir="input" type="control" hint="default_0">
<name>Feedback</name>
<p>The amount of the C delay output that is mixed back into the delay.</p>
<range min="-100" max="100"/>
</port>
<port label="high_d" dir="input" type="control" hint="default_middle">
<name>High damp (%)</name>
<p>The damping of the high frequencies in the feedback path.</p>
<range min="0" max="100"/>
</port>
<port label="low_d" dir="input" type="control" hint="default_middle">
<name>Low damp (%)</name>
<p>The damping of the low frequencies in the feedback path.</p>
<range min="0" max="100"/>
</port>
<port label="spread" dir="input" type="control" hint="default_middle">
<name>Spread</name>
<p>The width of the stereo image.</p>
<range min="0" max="50"/>
</port>
<port label="wet" dir="input" type="control" hint="default_0">
<name>Dry/Wet level</name>
<p>The amounts of the input and effect mixed to produce the output.</p>
<range min="0" max="1"/>
</port>
<port label="in_l" dir="input" type="audio">
<name>L input</name>
</port>
<port label="in_r" dir="input" type="audio">
<name>R input</name>
</port>
<port label="out_l" dir="output" type="audio">
<name>L output</name>
</port>
<port label="out_r" dir="output" type="audio">
<name>R output</name>
</port>
<instance-data label="buffer" type="LADSPA_Data *" />
<instance-data label="buffer_pos" type="unsigned int" />
<instance-data label="buffer_mask" type="unsigned int" />
<instance-data label="fs" type="float" />
<instance-data label="last_ll" type="float" />
<instance-data label="last_cl" type="float" />
<instance-data label="last_rl" type="float" />
<instance-data label="last_ld" type="float" />
<instance-data label="last_cd" type="float" />
<instance-data label="last_rd" type="float" />
<instance-data label="filters" type="biquad *" />
</plugin>
</ladspa>
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