//-----------------------------------------------------------------------------
// name: ksvoice.h
// desc: sample class for Karplus Strong
//
// Music 256a, Fall 2009, Stanford University
//     http://ccrma.stanford.edu/courses/256a-fall-2009/
//-----------------------------------------------------------------------------

#ifndef __KS_VOICE_H__
#define __KS_VOICE_H__


#define SAMPLE double

struct KSVoice
{
public:
    KSVoice();
    bool init( long delayLen );    
    void pluck();
    void synthesize( SAMPLE * buffy, long numFrames );
    
protected:
    // delay buffer
    SAMPLE * m_delay;
    // max delay length
    long m_delayMax;
    // delay length
    long m_delayLen;
    // attenuation factor
    SAMPLE m_factor;
    // previous input
    SAMPLE m_prev;
    // read and write indices
    long m_reader;
    long m_writer;
    // pluck in progress
    long m_pluck;    
};


#endif