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- /*
- ZynAddSubFX - a software synthesizer
-
- Envelope.h - Envelope implementation
- 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 or later) 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 ENVELOPE_H
- #define ENVELOPE_H
-
- #include "../globals.h"
-
- /**Implementation of a general Envelope*/
- class Envelope
- {
- public:
-
- /**Constructor*/
- Envelope(class EnvelopeParams &pars, float basefreq, float dt);
- /**Destructor*/
- ~Envelope();
- void releasekey();
- float envout();
- float envout_dB();
- /**Determines the status of the Envelope
- * @return returns 1 if the envelope is finished*/
- bool finished() const;
- private:
- float env_rap2dB(float rap);
- float env_dB2rap(float db);
- int envpoints;
- int envsustain; //"-1" means disabled
- float envdt[MAX_ENVELOPE_POINTS]; //millisecons
- float envval[MAX_ENVELOPE_POINTS]; // [0.0f .. 1.0f]
- float envstretch;
- int linearenvelope;
-
- int currentpoint; //current envelope point (starts from 1)
- int forcedrelease;
- bool keyreleased; //if the key was released
- bool envfinish;
- float t; // the time from the last point
- float inct; // the time increment
- float envoutval; //used to do the forced release
- };
-
-
- #endif
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