FMOplMidiDriver.h

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/*
Copyright (C) 2003  The Pentagram Team

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

#ifndef FMOPLMIDIDRIVER_H_INCLUDED
#define FMOPLMIDIDRIVER_H_INCLUDED

#ifdef USE_FMOPL_MIDI

#include "LowLevelMidiDriver.h"
#include "fmopl.h"

class IDataSource;

class FMOplMidiDriver : public LowLevelMidiDriver
{
        const static MidiDriverDesc     desc;
        static MidiDriver *createInstance() {
                return new FMOplMidiDriver();
        }

public:
        const static MidiDriverDesc* getDesc() { return &desc; }
        FMOplMidiDriver();

protected:
        // LowLevelMidiDriver implementation
        virtual int                     open();
        virtual void            close();
        virtual void            send(uint32 b);
        virtual void            lowLevelProduceSamples(sint16 *samples, uint32 num_samples);

        // MidiDriver overloads
        virtual bool            isSampleProducer() { return true; }
        virtual bool            isFMSynth() { return true; }
        virtual void            loadTimbreLibrary(IDataSource*, TimbreLibraryType type);

private:

        static const unsigned char midi_fm_instruments_table[128][11];
        static const int my_midi_fm_vol_table[128];
        static int lucas_fm_vol_table[128];
        static const unsigned char adlib_opadd[9];
        static const int fnums[12];
        static const double bend_fine[256];
        static const double bend_coarse[128];

        struct midi_channel {
                int inum;
                unsigned char ins[12];
                bool xmidi;
                int     xmidi_bank;
                int vol;
                int expression;
                int nshift;
                int on;
                int pitchbend;
                int pan;
        };
        struct xmidibank {
                unsigned char   insbank[128][12];
        };

        enum {
                ADLIB_MELODIC = 0,
                ADLIB_RYTHM = 1
        };

        void midi_write_adlib(unsigned int reg, unsigned char val);
        void midi_fm_instrument(int voice, unsigned char *inst);
        int  midi_calc_volume(int chan, int vel);
        void midi_update_volume(int chan);
        void midi_fm_volume(int voice, int volume);
        void midi_fm_playnote(int voice, int note, int volume, int pitchbend);
        void midi_fm_endnote(int voice);
        unsigned char adlib_data[256];


        int chp[9][4];
        unsigned char   myinsbank[128][12];
        xmidibank               *xmidibanks[128];
        void                    loadXMIDITimbres(IDataSource *ds);
        void                    loadU7VoiceTimbres(IDataSource *ds);

        FMOpl_Pentagram::FM_OPL *opl;
        midi_channel ch[16];
};

#endif //USE_FMOPL_MIDI

#endif //FMOPLDRV_H

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