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- /*
- Sin.cc
-
- Copyright 2002-7 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()
- {
- 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 = getport(0), fs, sin.get_phase());
- double g = (gain == *ports[1]) ?
- 1 : pow (getport(1) / gain, 1. / (double) frames);
- sample_t * d = ports[2];
- for (int i = 0; i < frames; ++i)
- {
- F (d, i, gain * sin.get(), adding_gain);
- gain *= g;
- }
- gain = getport(1);
- }
- /* //////////////////////////////////////////////////////////////////////// */
- PortInfo
- Sin::port_info [] =
- {
- {
- "f",
- INPUT | CONTROL,
- {BOUNDED | LOG | DEFAULT_100, 0.0001, 20000}
- }, {
- "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, 2004-7";
- /* fill port info and vtable */
- autogen();
- }
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