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/*
Scape.cc
Copyright 2004-6 Tim Goetze <tim@quitte.de>
http://quitte.de/dsp/
*/
/*
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 "Scape.h"
#include "Descriptor.h"
void
Scape::activate()
{
time = 0;
fb = 0;
for (int i = 0; i < 4; ++i)
svf[i].reset(),
svf[i].set_out (SVF::Band),
hipass[i].set_f (250. / fs);
svf[3].set_out (SVF::Low),
delay.reset();
period = 0;
}
static double
dividers [] = {
1 /* 0 sentinel */,
1, 0.5, 0.66666666666666666667, 0.75
};
float
frandom2()
{
float f = frandom();
return f * f * f;
}
template <sample_func_t F>
void
Scape::one_cycle (int frames)
{
d_sample * s = ports[0];
// double one_over_n = 1 / (double) frames;
/* delay times */
double t1 = fs * 60. / *ports[1];
int div = (int) *ports[2];
double t2 = t1 * dividers[div];
fb = *ports[3];
double dry = *ports[4];
dry = dry * dry;
double blend = *ports[5];
d_sample * dl = ports[6];
d_sample * dr = ports[7];
DSP::FPTruncateMode truncate;
while (frames)
{
/* flip 'renormal' addition constant */
normal = -normal;
/* retune filters */
if (period <= 1)
{
period = t2 * .5;
float f, q;
//fprintf (stderr, "%.3f: %d\n", period, (int) period);
f = frandom2();
svf[0].set_f_Q (300 + 300 * f / fs, .3);
svf[3].set_f_Q (300 + 600 * 2 * f / fs, .6);
f = frandom2();
q = f;
svf[1].set_f_Q (400 + 2400 * f / fs, q);
q = 1 - f;
svf[2].set_f_Q (400 + 2400 * f / fs, q);
}
int n = min ((int) period, frames);
if (n < 1)
{
fprintf (stderr, "Scape: %d - %d/%d frames, t2 = %.3f?!?\n", (int) period, n, frames, t2);
return;
}
/* sample loop */
for (int i = 0; i < n; ++i)
{
d_sample x = s[i] + normal;
d_sample x1 = delay.get_at (t1);
d_sample x2 = delay.get_at (t2);
delay.put (x + fb * x1 + normal);
x = dry * x + .2 * svf[0].process (x) + .6 * svf[3].process(x);
x1 = svf[1].process (x1 - normal);
x2 = svf[2].process (x2 - normal);
x1 = hipass[1].process (x1);
x2 = hipass[2].process (x2);
d_sample x1l, x1r, x2l, x2r;
x1l = fabs (lfo[0].get());
x1r = 1 - x1l;
x2r = fabs (lfo[1].get());
x2l = 1 - x2r;
F (dl, i, x + blend * (x1 * x1l + x2 * x2l), adding_gain);
F (dr, i, x + blend * (x2 * x2r + x1 * x1r), adding_gain);
}
frames -= n;
period -= n;
s += n;
dl += n;
dr += n;
}
}
/* //////////////////////////////////////////////////////////////////////// */
PortInfo
Scape::port_info [] =
{
{
"in",
INPUT | AUDIO,
{BOUNDED, -1, 1}
}, {
"bpm",
INPUT | CONTROL,
{BOUNDED | DEFAULT_LOW, 30, 240}
}, {
"divider",
INPUT | CONTROL,
{BOUNDED | INTEGER | DEFAULT_MIN, 2, 4}
}, {
"feedback",
INPUT | CONTROL,
{BOUNDED | DEFAULT_LOW, 0, 1}
}, {
"dry",
INPUT | CONTROL,
{BOUNDED | DEFAULT_LOW, 0, 1}
}, {
"blend",
INPUT | CONTROL,
{BOUNDED | DEFAULT_HIGH, 0, 1}
}, {
"out:l",
OUTPUT | AUDIO,
{0}
}, {
"out:r",
OUTPUT | AUDIO,
{0}
}
};
template <> void
Descriptor<Scape>::setup()
{
UniqueID = 2588;
Label = "Scape";
Properties = HARD_RT;
Name = "CAPS: Scape - Stereo delay + Filters";
Maker = "Tim Goetze <tim@quitte.de>";
Copyright = "GPL, 2004-6";
/* fill port info and vtable */
autogen();
}
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