src/mt32/Poly.h

/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
 * Copyright (C) 2011, 2012, 2013 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 2.1 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef MT32EMU_POLY_H
#define MT32EMU_POLY_H

#include "FileStream.h"

namespace MT32Emu {

class Synth;
class Part;

enum PolyState {
        POLY_Playing,
        POLY_Held, // This marks keys that have been released on the keyboard, but are being held by the pedal
        POLY_Releasing,
        POLY_Inactive
};

class Poly {
private:
        Synth *synth;
        Part *part;
        unsigned int key;
        unsigned int velocity;
        unsigned int activePartialCount;
        bool sustain;

        PolyState state;

    Partial* partials[4] = {};

        Poly *next;

public:
        Poly(Synth *useSynth, Part *usePart);
        void reset(unsigned int newKey, unsigned int newVelocity, bool newSustain, Partial **newPartials);
        bool noteOff(bool pedalHeld);
        bool stopPedalHold();
        bool startDecay();
        bool startAbort();
        void terminate();

        void backupCacheToPartials(PatchCache cache[4]);

        unsigned int getKey() const;
        unsigned int getVelocity() const;
        bool canSustain() const;
        PolyState getState() const;
        unsigned int getActivePartialCount() const;
        bool isActive() const;

        void partialDeactivated(Partial *partial);

        Poly *getNext();
        void setNext(Poly *poly);

        void saveState( std::ostream &stream );
        void loadState( std::istream &stream );

        // savestate debugging
        void rawVerifyState( char *name, Synth *synth );
};

}

#endif /* POLY_H_ */