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/*
ZynAddSubFX - a software synthesizer
LFO.h - LFO implementation
Copyright (C) 2006,2007,2008,2009 Nedko Arnaudov <nedko@arnaudov.name>
Copyright (C) 2002-2005 Nasca Octavian Paul
Author: Nasca Octavian Paul
This program is free software; you can redistribute it and/or modify
it under the terms of version 2 of the GNU General Public License
as published by the Free Software Foundation.
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 (version 2) for more details.
You should have received a copy of the GNU General Public License (version 2)
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef LFO_H
#define LFO_H
#define ZYN_LFO_TYPE_FREQUENCY 0
#define ZYN_LFO_TYPE_AMPLITUDE 1
#define ZYN_LFO_TYPE_FILTER 2
class LFO
{
public:
LFO();
void
init(
float sample_rate,
float base_frequency, // note
const struct zyn_lfo_parameters * parameters_ptr,
unsigned int type); // one of ZYN_LFO_TYPE_XXX
~LFO();
float lfoout();
float amplfoout();
private:
void computenextincrnd();
float m_x;
float m_incx;
float m_incrnd;
float m_nextincrnd;
// used for randomness
float m_amp1;
float m_amp2;
float m_lfointensity;
bool m_depth_randomness_enabled;
float m_depth_randomness;
bool m_frequency_randomness_enabled;
float m_frequency_randomness;
float m_delay;
char m_shape;
float m_sample_rate;
};
#endif
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