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git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/branches/lmms-mv@726 0778d3d1-df1d-0410-868b-ea421aaaa00d
96 lines
1.9 KiB
C++
96 lines
1.9 KiB
C++
/*
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Sin.cc
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Copyright 2002-7 Tim Goetze <tim@quitte.de>
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http://quitte.de/dsp/
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simple sin() generator.
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*/
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/*
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA or point your web browser to http://www.gnu.org.
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*/
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#include "basics.h"
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#include "Sin.h"
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#include "Descriptor.h"
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void
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Sin::init()
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{
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sin.set_f (f = .005, fs, 0);
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gain = 0;
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}
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template <sample_func_t F>
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void
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Sin::one_cycle (int frames)
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{
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if (f != *ports[0])
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sin.set_f (f = getport(0), fs, sin.get_phase());
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double g = (gain == *ports[1]) ?
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1 : pow (getport(1) / gain, 1. / (double) frames);
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d_sample * d = ports[2];
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for (int i = 0; i < frames; ++i)
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{
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F (d, i, gain * sin.get(), adding_gain);
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gain *= g;
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}
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gain = getport(1);
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}
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/* //////////////////////////////////////////////////////////////////////// */
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PortInfo
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Sin::port_info [] =
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{
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{
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"f",
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INPUT | CONTROL,
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{BOUNDED | LOG | DEFAULT_100, 0.0001, 20000}
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}, {
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"volume",
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INPUT | CONTROL,
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{BOUNDED | DEFAULT_MID, MIN_GAIN, 1}
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}, {
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"out",
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OUTPUT | AUDIO,
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{0}
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}
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};
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template <> void
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Descriptor<Sin>::setup()
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{
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UniqueID = 1781;
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Label = "Sin";
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Properties = HARD_RT;
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Name = CAPS "Sin - Sine wave generator";
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Maker = "Tim Goetze <tim@quitte.de>";
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Copyright = "GPL, 2004-7";
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/* fill port info and vtable */
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autogen();
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}
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