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/*
Sin.cc
Copyright 2002-5 Tim Goetze <tim@quitte.de>
http://quitte.de/dsp/
simple sin() generator.
*/
/*
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 "Sin.h"
#include "Descriptor.h"
void
Sin::init (double _fs)
{
fs = _fs;
sin.set_f (f = .005, fs, 0);
gain = 0;
}
template <sample_func_t F>
void
Sin::one_cycle (int frames)
{
if (f != *ports[0])
sin.set_f (f = *ports[0], fs, sin.get_phase());
double g = (gain == *ports[1]) ?
1 : pow (*ports[1] / gain, 1. / (double) frames);
d_sample * d = ports[2];
for (int i = 0; i < frames; ++i)
{
F (d, i, gain * sin.get(), adding_gain);
gain *= g;
}
gain = *ports[1];
}
/* //////////////////////////////////////////////////////////////////////// */
PortInfo
Sin::port_info [] =
{
{
"f",
INPUT | CONTROL,
{BOUNDED | FS | LOG | DEFAULT_440, 0, .5}
}, {
"volume",
INPUT | CONTROL,
{BOUNDED | DEFAULT_MID, MIN_GAIN, 1}
}, {
"out",
OUTPUT | AUDIO,
{0}
}
};
template <> void
Descriptor<Sin>::setup()
{
UniqueID = 1781;
Label = "Sin";
Properties = HARD_RT;
Name = "CAPS: Sin - Sine wave generator";
Maker = "Tim Goetze <tim@quitte.de>";
Copyright = "GPL, 2004-5";
/* fill port info and vtable */
autogen();
}
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