mdi.h

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/*
 * Adplug - Replayer for many OPL2/OPL3 audio file formats.
 * Copyright (C) 1999 - 2005 Simon Peter <dn.tlp@gmx.net>, et al.
 * 
 * This library 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 library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * mdi.h - AdLib SMF (MDI) Player by Stas'M <binarymaster@mail.ru>
 *
 * Based on MIDIPLAY.C by Dale Glowinski, Ad Lib Inc.
 *
 * REFERENCES:
 * http://www.shikadi.net/moddingwiki/MDI_Format
 * http://www.vgmpf.com/Wiki/index.php?title=MDI
 */
 
#ifndef H_ADPLUG_MDIPLAYER
#define H_ADPLUG_MDIPLAYER
 
#include "player.h"
#include "adlib.h"
 
#define MIDI_CHUNK_SIZE 4       /* FOURCC size */
#define MIDI_HEAD_SIZE  6       /* MThd data size */
#define MIDI_MIN_SIZE   MIDI_CHUNK_SIZE + sizeof(uint32_t) + MIDI_HEAD_SIZE + MIDI_CHUNK_SIZE + sizeof(uint32_t)
#define MIDI_DEF_TEMPO  500000
 
#define NR_CHANS                16
 
#define NOTE_OFF                0x80
#define NOTE_ON                 0x90
#define AFTER_TOUCH             0xA0
#define CONTROL_CHANGE  0xB0
#define PROG_CHANGE             0xC0
#define CHANNEL_PRESSURE        0xD0
#define PITCH_BEND              0xE0
#define SYSEX_F0                0xf0
#define SYSEX_F7                0xf7
#define STOP_FC                 0xfc
#define META                    0xff
 
#define END_OF_TRACK    0x2f
#define TEMPO                   0x51
#define SEQ_SPECIFIC    0x7f
 
#define META_SIGN_LEN   3
#define META_CODE_LEN   2
#define META_MIN_SIZE   META_SIGN_LEN + META_CODE_LEN + 1
 
#define ADLIB_TIMBRE    1
#define ADLIB_RHYTHM    2
#define ADLIB_PITCH             3
 
class CmdiPlayer: public CPlayer
{
public:
        static CPlayer *factory(Copl *newopl);
 
        CmdiPlayer(Copl *newopl)
                : CPlayer(newopl), data(0)
                { }
        ~CmdiPlayer()
        {
                if(data) delete [] data;
                if (drv) drv->~CadlibDriver();
        };
 
        bool load(const std::string &filename, const CFileProvider &fp);
        bool update();
        void rewind(int subsong);
 
        float getrefresh()
        {
                return timer;
        };
 
        std::string gettype()
        {
                return std::string("AdLib MIDIPlay File");
        }
 
private:
        void SetTempo(uint32_t tempo);
        uint32_t GetVarVal();
        void executeCommand();
        CadlibDriver *drv;
 
protected:
        unsigned long   pos, size;
        bool            songend;
        float           timer;
        uint16_t        division;                               /* division in PPQN */
        uint8_t *       data;                                   /* MIDI data */
 
        uint32_t        counter;                                        /* tick counter */
        uint32_t        ticks;                                  /* ticks to wait for next event */
        uint8_t         status;                 /* running status byte */
        uint8_t         volume[MAX_VOICES];             /* actual volume of all voices */
};
 
#endif