/*
  $Id: _midi.h,v 1.7 2004/11/17 03:00:14 leighsmith Exp $
  Defined In: The MusicKit

  Description:
    Defines MIDI input and output structures, constants and functions.

  Original Author: David A. Jaffe

  Copyright (c) 1988-1992, NeXT Computer, Inc.
  Portions Copyright (c) 1994 NeXT Computer, Inc. and reproduced under license from NeXT
  Portions Copyright (c) 1994 Stanford University
  Portions Copyright (c) 1999-2004 The MusicKit Project.
*/
/*
  Modification history prior to CVS commit:

  daj/04/23/90 - Created from _musickit.h 
*/
#ifndef __MK__midi_H___
#define __MK__midi_H___

#define _MK_MIDIIN_MULTIPLE_VOICES_ON_SAME_KEYNUM 0

typedef struct __MKMidiInStruct { /* This is the midi input structure. */
    double timeTag;     /* Current time */
    int _noteTags[MIDI_NUMCHANS]; /* Base for each channel */
    unsigned short _on[MIDI_NUMKEYS];   /* Bit vectors, one per key */
    short chan;          /* Channel of note, or _MK_MIDISYS. */ 
    /* The following is the midi parse state. */
    unsigned char _dataByte1,_dataByte2,_statusByte,_runningStatus;
    BOOL _firstDataByteSeen;  
    short _dataBytes;  
    id _note;        /* The note owned by the midi input. */
    int _sysExSize;    /* For collecting system exclusive bytes. */
    unsigned char * _sysExBuf;
    unsigned char *_endOfSysExBuf;
    unsigned char *_sysExP;
#   ifdef _MK_MIDIIN_MULTIPLE_VOICES_ON_SAME_KEYNUM
    unsigned short _defTagOffSent[MIDI_NUMKEYS]; 
    void *_tagLists[MIDI_NUMCHANS];/* One list per chan */ 
#   endif
} _MKMidiInStruct;

typedef struct __MKMidiOutStruct { /* Midi output structure */
    id _owner;         /* Object owning this struct */
    double _timeTag;   /* Current timeTag. */
    void (*_putSysMidi)(struct __MKMidiOutStruct *ptr);
    void (*_putChanMidi)(struct __MKMidiOutStruct *ptr);
    void (*_putSysExcl)(struct __MKMidiOutStruct *ptr,NSString *sysExclStr);
    void (*_sendBufferedData)(struct __MKMidiOutStruct *ptr);
    unsigned char _bytes[3];
    short _outBytes;
    unsigned char _maxCount[MIDI_NUMCHANS][MIDI_NUMKEYS];
    unsigned char _curCount[MIDI_NUMCHANS][MIDI_NUMKEYS];
    /* Used to stack noteOns against noteOffs. */
    NSMapTable *_map[MIDI_NUMCHANS];
    /* Implements conversion from music kit to MIDI semantics. */
    unsigned char _runningStatus;
    void *_midiFileStruct;
} _MKMidiOutStruct;

// see _scorefile.h for the scorefile extension definitions
#define _MK_MIDIFILEEXT @"midi"

/* Midi parts */
#define  _MK_MIDINOTEPORTS MIDI_NUMCHANS +  1
#define  _MK_MIDISYS 0

/* Functions for MIDI->MK semantic conversion. */
extern _MKMidiInStruct *_MKInitMidiIn(void);
extern MKNote *_MKMidiToMusicKit(_MKMidiInStruct *ptr, unsigned statusByte);
extern _MKMidiInStruct *_MKFinishMidiIn(_MKMidiInStruct *ptr);

/* Functions for MK->MIDI semantic conversion. */
extern _MKMidiOutStruct *_MKInitMidiOut(void);
extern  _MKMidiOutStruct *_MKFinishMidiOut(_MKMidiOutStruct *ptr);
extern void _MKWriteMidiOut(MKNote *aNote, double timeTag, unsigned chan, _MKMidiOutStruct *ptr, MKNoteReceiver *noteReceiver);
extern unsigned char _MKGetSysExByte(char **strP);

/* Useful for sending allNotesOff */
extern NSMutableArray *_MKGetNoteOns(_MKMidiOutStruct *ptr, int chan);


#endif