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src/mt32/Poly.h
00001 /* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
00002  * Copyright (C) 2011, 2012, 2013 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
00003  *
00004  *  This program is free software: you can redistribute it and/or modify
00005  *  it under the terms of the GNU Lesser General Public License as published by
00006  *  the Free Software Foundation, either version 2.1 of the License, or
00007  *  (at your option) any later version.
00008  *
00009  *  This program is distributed in the hope that it will be useful,
00010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  *  GNU Lesser General Public License for more details.
00013  *
00014  *  You should have received a copy of the GNU Lesser General Public License
00015  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
00016  */
00017 
00018 #ifndef MT32EMU_POLY_H
00019 #define MT32EMU_POLY_H
00020 
00021 #include "FileStream.h"
00022 
00023 namespace MT32Emu {
00024 
00025 class Synth;
00026 class Part;
00027 
00028 enum PolyState {
00029         POLY_Playing,
00030         POLY_Held, // This marks keys that have been released on the keyboard, but are being held by the pedal
00031         POLY_Releasing,
00032         POLY_Inactive
00033 };
00034 
00035 class Poly {
00036 private:
00037         Synth *synth;
00038         Part *part;
00039         unsigned int key;
00040         unsigned int velocity;
00041         unsigned int activePartialCount;
00042         bool sustain;
00043 
00044         PolyState state;
00045 
00046         Partial *partials[4];
00047 
00048         Poly *next;
00049 
00050 public:
00051         Poly(Synth *useSynth, Part *usePart);
00052         void reset(unsigned int key, unsigned int velocity, bool sustain, Partial **partials);
00053         bool noteOff(bool pedalHeld);
00054         bool stopPedalHold();
00055         bool startDecay();
00056         bool startAbort();
00057         void terminate();
00058 
00059         void backupCacheToPartials(PatchCache cache[4]);
00060 
00061         unsigned int getKey() const;
00062         unsigned int getVelocity() const;
00063         bool canSustain() const;
00064         PolyState getState() const;
00065         unsigned int getActivePartialCount() const;
00066         bool isActive() const;
00067 
00068         void partialDeactivated(Partial *partial);
00069 
00070         Poly *getNext();
00071         void setNext(Poly *poly);
00072 
00073         void saveState( std::ostream &stream );
00074         void loadState( std::istream &stream );
00075 
00076         // savestate debugging
00077         void rawVerifyState( char *name, Synth *synth );
00078 };
00079 
00080 }
00081 
00082 #endif /* POLY_H_ */