MKMTCPerformer.h

/*
  $Id: MKMTCPerformer.h 3287 2005-05-27 09:52:26Z leighsmith $
  Defined In: The MusicKit

  Description:
    See discussion below.

  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 CCRMA, Stanford University.
  Portions (Time code extensions) Copyright (c) 1993 Pinnacle Research.
  Portions Copyright (c) 1999-2005, The MusicKit Project.
*/
#ifndef __MK_MTCPerformer_H___
#define __MK_MTCPerformer_H___
#import "MKPerformer.h"

#define MK_MTC_FORMAT_24      0   

#define MK_MTC_FORMAT_25      1

#define MK_MTC_FORMAT_DROP_30 2

#define MK_MTC_FORMAT_30      3

#define MK_MTC_REVERSE (-1)

#define MK_MTC_FORWARD 1

/* These functions do not compensate for deltaT.  They're just straight translation  
 */
extern double MKConvertMTCToSeconds(short format,
                                    short hours,
                                    short minutes,
                                    short seconds,
                                    short frames);

extern void MKConvertSecondsToMTC(double seconds, 
                                  short format,
                                  short *hoursPtr,
                                  short *minutesPtr,
                                  short *secondsPtr,
                                  short *framesPtr);

@interface MKMTCPerformer: MKPerformer
{
    double firstTimeTag;   
    double lastTimeTag;    
    int direction;         
    short format;          
    id noteSender;  // TODO MKNoteSender *
    id aNote; // TODO MKNote *
    BOOL frozen;

@private
    int _cmpStat;
    /* This is the stopping point, in delta-t-adjusted time */
    short _lastHours;
    short _lastMinutes;
    short _lastSeconds;
    short _lastFrames;
    short _frameQuarter;     /* Which quarter-frame we're on */

    /* These are the time in delta-t adjusted units.  Use
     * the access methods to get their value in MKConductor's time
     * base.
     */
    short _hours;
    short _minutes;
    short _seconds;
    short _frames;
}


- init;

- setFirstTimeTag: (double) firstTimeTag;

- setLastTimeTag: (double) lastTimeTag;

- setFirstTimeTagMTCHours: (short) h minutes: (short) m seconds: (short) s frames: (short) f;

- setLastTimeTagMTCHours: (short) h minutes: (short) m seconds: (short) s frames: (short) f;

- setTimeShiftMTCHours: (short) h minutes: (short) m seconds: (short) s frames: (short) f;

- (double) firstTimeTag;

- (double) lastTimeTag;

-setFormat:(int)fmt;

-(double)timeTag;

-getMTCHours:(short *)h minutes:(short *)m seconds:(short *)s frames:(short *)f;

-setDirection:(int)newDirection;

-sendUserBits:(unsigned int)userBits groupFlagBits:(unsigned char)groupFlagBits;

-freezeTimeCode;  

-thawTimeCode;

-sendFullMTCMessage; 

-activateSelf;    

- (void)deactivate;

-pause;           /* Sends NAK SYSEX, then pauses.  */

-resume;          /* Resumes time code. Sends a Full message */

-perform;

@end

#endif

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