XMidiFile.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 XMIDIFILE_H_INCLUDED
#define XMIDIFILE_H_INCLUDED

class IDataSource;
class OIDataSource;
struct XMidiEvent;
class XMidiEventList;

// Conversion types for Midi files
#define XMIDIFILE_CONVERT_NOCONVERSION          0
#define XMIDIFILE_CONVERT_MT32_TO_GM            1
#define XMIDIFILE_CONVERT_MT32_TO_GS            2
#define XMIDIFILE_CONVERT_MT32_TO_GS127         3
#define XMIDIFILE_CONVERT_GM_TO_MT32            4

#define XMIDIFILE_CONVERT_GS127_TO_GS           5
#define XMIDIFILE_HINT_U7VOICE_MT_FILE          6
#define XMIDIFILE_HINT_XMIDI_MT_FILE            7
#define XMIDIFILE_HINT_SYX_FILE                         8
#define XMIDIFILE_HINT_SYSEX_IN_MID                     9

class   XMidiFile
{
protected:
        uint16                          num_tracks;

private:
        XMidiEventList          **events;

        XMidiEvent                      *list;
        XMidiEvent                      *branches;
        XMidiEvent                      *current;
        XMidiEvent                      *notes_on;
        
        const static char       mt32asgm[128];
        const static char       mt32asgs[256];
        const static char       gmasmt32[128];
        bool                            bank127[16];
        int                                     convert_type;
        
        bool                            do_reverb;
        bool                            do_chorus;
        int                                     chorus_value;
        int                                     reverb_value;

        // Midi Volume Curve Modification
        //static GammaTable<unsigned char>      VolumeCurve;

public:
        XMidiFile(IDataSource *source, int pconvert);
        ~XMidiFile();

        int number_of_tracks() { return num_tracks; }

        // External Event list functions
        XMidiEventList *GetEventList (uint32 track);

        // Not yet implimented
        // int apply_patch (int track, DataSource *source);

private:
        XMidiFile(); // No default constructor
    
    struct first_state {                        // Status,      Data[0]
                XMidiEvent              *patch[16];     // 0xC
                XMidiEvent              *bank[16];      // 0xB,         0
                XMidiEvent              *pan[16];       // 0xB,         7
                XMidiEvent              *vol[16];       // 0xB,         10
        };

        // List manipulation
        void CreateNewEvent (int time);

        // Variable length quantity
        int GetVLQ (IDataSource *source, uint32 &quant);
        int GetVLQ2 (IDataSource *source, uint32 &quant);

        void AdjustTimings(uint32 ppqn);        // This is used by Midi's ONLY!
        void ApplyFirstState(first_state &fs, int chan_mask);

        int ConvertNote (const int time, const unsigned char status, IDataSource *source, const int size);
        int ConvertEvent (const int time, const unsigned char status, IDataSource *source, const int size, first_state& fs);
        int ConvertSystemMessage (const int time, const unsigned char status, IDataSource *source);
        int CreateMT32SystemMessage(const int time, uint32 address_base, uint16 address_offset, uint32 len, const void *data = 0, IDataSource *source=0);

        int ConvertFiletoList (IDataSource *source, const bool is_xmi, first_state& fs);

        int ExtractTracksFromXmi (IDataSource *source);
        int ExtractTracksFromMid (IDataSource *source, const uint32 ppqn, const int num_tracks, const bool type1);
        
        int ExtractTracks (IDataSource *source);

        int ExtractTracksFromU7V (IDataSource *source);
        int ExtractTracksFromXMIDIMT (IDataSource *source);
        void InsertDisplayEvents();
};

#endif //XMIDIFILE_H_INCLUDED

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