MKEnvelope.h

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/*
  $Id: MKEnvelope.h 3623 2009-09-25 11:14:32Z leighsmith $
  
  Defined In: The MusicKit
  Description:
    (See discussion below)

  Original Author: David 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) 1999-2001, The MusicKit Project.
*/
#ifndef __MK_Envelope_H___
#define __MK_Envelope_H___

#import <Foundation/Foundation.h>

typedef enum _MKEnvStatus { 
    MK_noMorePoints = -1,
    MK_noEnvError = 0,
    MK_stickPoint,
    MK_lastPoint
} MKEnvStatus;

@interface MKEnvelope : NSObject
{
    double defaultSmoothing;
    double samplingPeriod;
    double *xArray;
    double *yArray;
    double *smoothingArray;
    int stickPoint;
    int pointCount;
}


- init; 


- (int) pointCount;

- (double) defaultSmoothing;

- (double) samplingPeriod;

- (int) stickPoint; 

- (double *) yArray;

- (double *) xArray;

- (double *) smoothingArray;

- (MKEnvStatus) getNth: (int) n
                     x: (double *) xPtr
                     y: (double *) yPtr
             smoothing: (double *) smoothingPtr; 

- writeScorefileStream: (NSMutableData *) aStream; 

- (double) lookupYForX: (double) xVal;

- (double) lookupYForXAsymptotic: (double) xVal;

- (double) releaseDur;

- (double) attackDur;


- setStickPoint: (int) stickPointIndex; 

-    setPointCount: (int) n
            xArray: (double *) xPtr
  orSamplingPeriod: (double) period
            yArray: (double *) yPtr
    smoothingArray: (double *) smoothingPtr
orDefaultSmoothing: (double) smoothing;

- setPointCount: (int) n
         xArray: (double *) xPtr
         yArray: (double *) yPtr;

@end

#endif

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