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/*
Phaser.cc
Copyright 2002-4 Tim Goetze <tim@quitte.de>
http://quitte.de/dsp/
simple mono phaser, 6 all-pass lines, the usual controls.
*/
/*
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA or point your web browser to http://www.gnu.org.
*/
#include "basics.h"
#include "Phaser.h"
#include "Descriptor.h"
template <sample_func_t F>
void
Phaser::one_cycle (int frames)
{
d_sample * s = ports[0];
if (rate != *ports[1])
{
rate = *ports[1];
lfo.set_f (max (.001, rate * (double) blocksize), fs, lfo.get_phase());
}
double depth = *ports[2];
double spread = 1 + *ports[3];
double fb = *ports[4];
d_sample * dst = ports[5];
while (frames)
{
if (remain == 0) remain = 32;
int n = min (remain, frames);
double d = delay.bottom + delay.range * (1. - fabs (lfo.get()));
for (int j = 5; j >= 0; --j)
{
ap[j].set (d);
d *= spread;
}
for (int i = 0; i < n; ++i)
{
d_sample x = s[i];
d_sample y = x + y0 * fb;
for (int j = 5; j >= 0; --j)
y = ap[j].process (y);
y0 = y;
F (dst, i, x + y * depth, adding_gain);
}
s += n;
dst += n;
frames -= n;
remain -= n;
}
}
/* //////////////////////////////////////////////////////////////////////// */
PortInfo
Phaser::port_info [] =
{
{
"in",
INPUT | AUDIO,
{BOUNDED, -1, 1}
}, {
"rate (Hz)",
INPUT | CONTROL,
{BOUNDED | DEFAULT_1, 0, 10}
}, {
"depth",
INPUT | CONTROL,
{BOUNDED | DEFAULT_HIGH, 0, 1}
}, {
"spread",
INPUT | CONTROL,
{BOUNDED | DEFAULT_LOW, 0, M_PI}
}, {
"feedback",
INPUT | CONTROL,
{BOUNDED | DEFAULT_HIGH, 0, .999}
}, {
"out",
OUTPUT | AUDIO,
{0}
}
};
Descriptor<Phaser>::Descriptor<Phaser>()
{
UniqueID = 1775;
Label = "Phaser";
Properties = HARD_RT;
Name = "Mono phaser";
Maker = "Tim Goetze <tim@quitte.de>";
Copyright = "GPL, 2002-4";
/* fill port info and vtable */
autogen();
}
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