SndPerformance.h

//
//  $Id: SndPerformance.h 3449 2009-04-04 16:52:47Z leighsmith $
//    
//  Original Author: Leigh Smith, <leigh@tomandandy.com>
//
//  Copyright (c) 2001, The MusicKit Project.  All rights reserved.
//
//  Permission is granted to use and modify this code for commercial and 
//  non-commercial purposes so long as the author attribution and copyright 
//  messages remain intact and accompany all relevant code.
//

#ifndef __SND_PERFORMANCE_H__
#define __SND_PERFORMANCE_H__

#import <Foundation/Foundation.h>
#import "Snd.h"
#import "SndAudioBuffer.h"
#import "SndAudioProcessorChain.h"

@interface SndPerformance : NSObject
{
    Snd    *snd;
    double  playTime;
    long    startAtIndex;
    long  playIndex;
    long    endAtIndex;
    BOOL    paused;
    SndAudioProcessorChain *audioProcessorChain;

    BOOL looping;
    long loopStartIndex;
    long loopEndIndex;

    // ivars for variable speed playback - TODO needs fixing and documenting
    double  deltaTime;

    double  actualTime;
}

+ (SndPerformance *) performanceOfSnd: (Snd *) s playingAtTime: (double) seconds;

+ (SndPerformance *) performanceOfSnd: (Snd *) s 
                        playingAtTime: (double) seconds
                         beginAtIndex: (long) beginIndex
                           endAtIndex: (long) endIndex;
- initWithSnd: (Snd *) s playingAtTime: (double) seconds;

- initWithSnd: (Snd *) s
playingAtTime: (double) seconds
 beginAtIndex: (long) beginIndex
   endAtIndex: (long) endIndex;

- initWithSnd: (Snd *) s
playingAtTime: (double) playTime
startPosition: (double) startPosition
     duration: (double) duration
    deltaTime: (double) deltaTime;

- (Snd *) snd;

- (double) playTime;

- setPlayTime: (double) t;

- (double) deltaTime;
- (void) setDeltaTime: (double) _deltaTime;


- (long) playIndex;

- (void) setPlayIndex: (long) newPlayIndex;

- (long) rewindPlayIndexBySamples: (long) numberOfSamplesToRewind;

- (long) endAtIndex;

- (long) startAtIndex;

- (void) setEndAtIndex: (long) newEndAtIndex;

- (void) setLooping: (BOOL) yesOrNo;

-  (BOOL) looping;

- (void) setLoopStartIndex: (long) loopStartIndex;

- (long) loopStartIndex;

- (void) setLoopEndIndex: (long) newLoopEndIndex;

- (long) loopEndIndex;

- (void) stopInFuture: (double) inSeconds;

- (void) stopNow;

- (BOOL) isEqual: (id) anotherPerformance;

- (void) dealloc;

- (NSString *) description;

- (BOOL) isPaused;

- setPaused: (BOOL) b;

- pause;

- resume;

- (BOOL) isPlaying;

- (SndAudioProcessorChain *) audioProcessorChain;

- (void) setAudioProcessorChain: (SndAudioProcessorChain *) anAudioProcessorChain;

- (long) retrievePerformBuffer: (SndAudioBuffer *) bufferToFill ofLength: (long) buffLength;

- (BOOL) atEndOfPerformance;

@end


#endif

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