/***************************************************/
/*! \class Flute
    \brief STK flute physical model class.

    This class implements a simple flute
    physical model, as discussed by Karjalainen,
    Smith, Waryznyk, etc.  The jet model uses
    a polynomial, a la Cook.

    This is a digital waveguide model, making its
    use possibly subject to patents held by Stanford
    University, Yamaha, and others.

    Control Change Numbers: 
       - Jet Delay = 2
       - Noise Gain = 4
       - Vibrato Frequency = 11
       - Vibrato Gain = 1
       - Breath Pressure = 128

    by Perry R. Cook and Gary P. Scavone, 1995 - 2005.
*/
/***************************************************/

#ifndef STK_FLUTE_H
#define STK_FLUTE_H

#include "Instrmnt.h"
#include "JetTable.h"
#include "DelayL.h"
#include "OnePole.h"
#include "PoleZero.h"
#include "Noise.h"
#include "ADSR.h"
#include "SineWave.h"

namespace Nyq
{

class Flute : public Instrmnt
{
 public:
  //! Class constructor, taking the lowest desired playing frequency.
  /*!
    An StkError will be thrown if the rawwave path is incorrectly set.
  */
  Flute(StkFloat lowestFrequency);

  //! Class destructor.
  ~Flute();

  //! Reset and clear all internal state.
  void clear();

  //! Set instrument parameters for a particular frequency.
  void setFrequency(StkFloat frequency);

  //! Set the reflection coefficient for the jet delay (-1.0 - 1.0).
  void setJetReflection(StkFloat coefficient);

  //! Set the reflection coefficient for the air column delay (-1.0 - 1.0).
  void setEndReflection(StkFloat coefficient);

  //! Set the length of the jet delay in terms of a ratio of jet delay to air column delay lengths.
  void setJetDelay(StkFloat aRatio);

  //! Apply breath velocity to instrument with given amplitude and rate of increase.
  void startBlowing(StkFloat amplitude, StkFloat rate);

  //! Decrease breath velocity with given rate of decrease.
  void stopBlowing(StkFloat rate);

  //! Start a note with the given frequency and amplitude.
  void noteOn(StkFloat frequency, StkFloat amplitude);

  //! Stop a note with the given amplitude (speed of decay).
  void noteOff(StkFloat amplitude);

  //! Perform the control change specified by \e number and \e value (0.0 - 128.0).
  void controlChange(int number, StkFloat value);

 protected:

  StkFloat computeSample( void );

  DelayL   jetDelay_;
  DelayL   boreDelay_;
  JetTable jetTable_;
  OnePole  filter_;
  PoleZero dcBlock_;
  Noise    noise_;
  ADSR     adsr_;
  SineWave vibrato_;
  unsigned long length_;
  StkFloat lastFrequency_;
  StkFloat maxPressure_;
  StkFloat jetReflection_;
  StkFloat endReflection_;
  StkFloat noiseGain_;
  StkFloat vibratoGain_;
  StkFloat outputGain_;
  StkFloat jetRatio_;

};

} // namespace Nyq

#endif