UT/UT_Midi.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * Produced by:
 *      Mark Alexander
 *      Side Effects Software Inc
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        UT_Midi.h ( UT Library, C++)
 *
 * COMMENTS:
 *
 *              This is a generic midi class to contain midi
 *              methods without creating link dependencies
 */

#ifndef __UT_Midi__
#define __UT_Midi__

#include "UT_API.h"
#include <string.h>

#include "UT_Endian.h"
#include "UT_RefArray.h"
#include "UT_PtrArray.h"
#include "UT_IntArray.h"

class UT_MidiFile;

#ifdef WIN32
    #define MIDI_IN_DEVICE_BASE         128
    #define MIDI_OUT_DEVICE_BASE        256
#else
    #define MIDI_IN_DEVICE_BASE         4096
    #define MIDI_OUT_DEVICE_BASE        8192
#endif
#define MIDI_IN_FILE_BASE       12288
#define MIDI_OUT_FILE_BASE      16384
#define MIDI_NUM_DEVICES        4095

/* timing modes */
#define MD_NOSTAMP           1
#define MD_DELTASTAMP        2
#define MD_RELATIVESTAMP     3
#define MD_DELTATICKS        4      /* delta ticks, as in SMF 1.0 */
#define MD_RELATIVETICKS     5      /* relative ticks */

#define MD_STAMPING_MASK     0xf

#define MD_CHANNELMASK              0x0F
#define MD_STATUSMASK               0xF0

#define MD_CHANNELVOICE             0x80
#define MD_NOTEOFF                  0x80
#define MD_NOTEON                   0x90    /* note-off is also note-on w/velocity=0 */
#define MD_POLYKEYPRESSURE          0xA0    /* polyphonic key pressure or aftertouch */
#define MD_CONTROLCHANGE            0xB0
#define MD_CHANNELMODESELECT        0xB0
#define MD_PROGRAMCHANGE            0xC0
#define MD_CHANNELPRESSURE          0xD0    /* aftertouch is the Yamaha term */ 
#define MD_PITCHBENDCHANGE          0xE0

#ifdef MD_SYSEX
#undef MD_SYSEX
#endif
#define MD_SYSEX                    0xF0        /* System Exclusive */
#define MD_SYSTEMREALTIME           0xF8
#define MD_TIMINGCLOCK              0xF8
#define MD_UNDEFINED3               0xF9
#define MD_START                    0xFA
#define MD_CONTINUE                 0xFB
#define MD_STOP                     0xFC
#define MD_UNDEFINED4               0xFD
#define MD_ACTIVESENSING            0xFE
#define MD_SYSTEMRESET              0xFF
#define MD_META                     0xFF        /* MIDI Files only */
#define MD_SYSTEMCOMMON             0xF1
#define MD_TIMECODEQUARTERFRAME     0xF1
#define MD_SONGPOSITIONPOINTER      0xF2
#define MD_SONGSELECT               0xF3
#define MD_UNDEFINED1               0xF4
#define MD_UNDEFINED2               0xF5
#define MD_TUNEREQUEST              0xF6
#define MD_EOX                      0xF7        /* End of System Exclusive */

#define MAX_SYSEXMSG_LEN            128

#define SYSEX_TYPE_NONE                 (0)
#define SYSEX_TYPE_BARMARKER            (1)

#define MESSAGE_VALUE_RAW               (-1)
#define MESSAGE_VALUE_NORM              (-2)
#define MESSAGE_DONTCARE                (-3)
#define MESSAGE_STOP                    (-4)


class UT_API midiEvent
{
public:

    char                 msg[3];
    uint64               time;
    char                 bar;
    float                barvalue;
    int                  trackNum;
    char                 sysexmsg[MAX_SYSEXMSG_LEN];
    int                  sysexlen;
    

                midiEvent()             { sysexlen = 0; trackNum=-1; }
                explicit midiEvent(const int)   { sysexlen = 0; trackNum=-1; }

                midiEvent(const midiEvent &mdv)
                { 
                    msg[0] = mdv.msg[0];
                    msg[1] = mdv.msg[1];
                    msg[2] = mdv.msg[2];
                    time = mdv.time;
                    bar = mdv.bar;
                    barvalue = mdv.barvalue;
                    trackNum = -1;

                    memcpy(sysexmsg, mdv.sysexmsg, mdv.sysexlen);
                    sysexlen = mdv.sysexlen;
                }

                ~midiEvent() 
                 { };

    midiEvent  &operator=(const midiEvent &mdv)
                { 
                    msg[0] = mdv.msg[0];
                    msg[1] = mdv.msg[1];
                    msg[2] = mdv.msg[2];

                    time = mdv.time;
                    bar = mdv.bar;
                    barvalue = mdv.barvalue;
                    trackNum = mdv.trackNum;

                    memcpy(sysexmsg, mdv.sysexmsg, mdv.sysexlen);
                    sysexlen = mdv.sysexlen;

                    return *this;
                }

    int         operator==(const midiEvent &mdv)
                {
                    if (msg[0] == mdv.msg[0] &&
                        msg[1] == mdv.msg[1] &&
                        msg[2] == mdv.msg[2] &&
                        time == mdv.time &&
                        sysexlen == mdv.sysexlen)
                    {
                        return 1;
                    }
                    else
                    {
                        return 0;
                    }
                }
};

class UT_API UT_Midi 
{

public:

     UT_Midi();
    virtual ~UT_Midi();

    virtual int         numInterfaces(int indevices);
    virtual const char *interfaceName(int n, int indevices);
    
    virtual int         openPort(const char *portname, int read);
    virtual int         openFile(const char *filename, int read,
                                 fpreal start, fpreal end);
    virtual int         openFile(const char *filename, 
                                 UT_RefArray<midiEvent> &events);

    // these five methods have both a file and a device version.
    // the device versions are implemented in $MIDI/MIDI_Interface.
    // the file versions are implemented in this file.
    //
            void        closePort(int port);
    
            int         hasMidiInput(int port, uint64 up_to_time,
                                     UT_IntArray &channel);
    
            void        getMidiInput(int port,
                                     uint64 up_to_time,
                                     UT_RefArray<midiEvent> &midi_input,
                                     UT_IntArray &channel);

            int         sendMidiOutput(int port,
                                       UT_RefArray<midiEvent> &midi_output,
                                       int channel);

            void        clearQueue(int port);
    ////

            uint64      getLastFileTime(int port);
    
    virtual uint64      getTime(int port);
    virtual void        setTimerCallback(void (*callback)(void *));

    virtual void        startRecordTimer(void *, int time);
    virtual void        stopRecordTimer(void *);
            void        setPrintMessage(int);

    virtual uint64      markOffsetTime(int port);

            int         identifySysex(const char *, int len, float *value=0);

            void        printMessage(midiEvent *);
            int         printMessages()         { return myPrintMessageFlag; }

            void        setBarMarkerMessage(const int *a)
                        { myBarMarkerMessage = a; }

protected:
    // All Device methods are empty at this level. Implemented in
    // MIDI_Interface.{C,h}
    //
    virtual int         hasDeviceInput(int port,uint64 up_to_time,
                                     UT_IntArray &channel);
            int         hasFileInput(int port,uint64 up_to_time,
                                     UT_IntArray &channel);
  
    virtual void        getDeviceInput(int port,
                                     uint64 up_to_time,
                                     UT_RefArray<midiEvent> &midi_input,
                                     UT_IntArray &channel);
            void        getFileInput(int port,
                                     uint64 up_to_time,
                                     UT_RefArray<midiEvent> &midi_input,
                                     UT_IntArray &channel);
    virtual int         sendDeviceOutput(int port,
                                       UT_RefArray<midiEvent> &midi_output,
                                       int channel);

            int         sendFileOutput(int port,
                                       UT_RefArray<midiEvent> &midi_output,
                                       int channel);

    virtual void        clearDeviceQueue(int port);
            void        clearFileQueue(int port);

    virtual void        closeDevice(int port);
            void        closeFile(int port);

            int         myPrintMessageFlag;

    uint64                       myLastTime;
private:

    UT_PtrArray<UT_MidiFile *>   myInputFiles;
    UT_PtrArray<UT_MidiFile *>   myOutputFiles;
    const int                   *myBarMarkerMessage;
    void                         printSysexMessage(int *array);


};

UT_API extern UT_Midi           *UTgetMidi(); // Get the app interrupt ptr
UT_API extern void               UTsetMidi(UT_Midi *);


#endif

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