/***************************************************/
/*! \class BandedWG
    \brief Banded waveguide modeling class.

    This class uses banded waveguide techniques to
    model a variety of sounds, including bowed
    bars, glasses, and bowls.  For more
    information, see Essl, G. and Cook, P. "Banded
    Waveguides: Towards Physical Modelling of Bar
    Percussion Instruments", Proceedings of the
    1999 International Computer Music Conference.

    Control Change Numbers: 
       - Bow Pressure = 2
       - Bow Motion = 4
       - Strike Position = 8 (not implemented)
       - Vibrato Frequency = 11
       - Gain = 1
       - Bow Velocity = 128
       - Set Striking = 64
       - Instrument Presets = 16
         - Uniform Bar = 0
         - Tuned Bar = 1
         - Glass Harmonica = 2
         - Tibetan Bowl = 3

    by Georg Essl, 1999 - 2004.
    Modified for Stk 4.0 by Gary Scavone.
*/
/***************************************************/

#ifndef STK_BANDEDWG_H
#define STK_BANDEDWG_H

const int MAX_BANDED_MODES = 20;

#include "Instrmnt.h"
#include "DelayL.h"
#include "BowTable.h"
#include "ADSR.h"
#include "BiQuad.h"

class BandedWG : public Instrmnt
{
 public:
  //! Class constructor.
  BandedWG();

  //! Class destructor.
  ~BandedWG();

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

  //! Set strike position (0.0 - 1.0).
  void setStrikePosition(StkFloat position);

  //! Select a preset.
  void setPreset(int preset);

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

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

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

  //! Pluck the instrument with given amplitude.
  void pluck(StkFloat amp);

  //! 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);

  //! Compute one output sample.
  StkFloat tick();

  //! Computer \e vectorSize outputs and return them in \e vector.
  StkFloat *tick(StkFloat *vector, unsigned int vectorSize);

  //! Fill a channel of the StkFrames object with computed outputs.
  /*!
    The \c channel argument should be one or greater (the first
    channel is specified by 1).  An StkError will be thrown if the \c
    channel argument is zero or it is greater than the number of
    channels in the StkFrames object.
  */
  StkFrames& tick( StkFrames& frames, unsigned int channel = 1 );

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

 protected:

  bool doPluck_;
  bool trackVelocity_;
  int nModes_;
  int presetModes_;
  BowTable bowTable_;
  ADSR     adsr_;
  BiQuad   bandpass_[MAX_BANDED_MODES];
  DelayL   delay_[MAX_BANDED_MODES];
  StkFloat maxVelocity_;
  StkFloat modes_[MAX_BANDED_MODES];
  StkFloat frequency_;
  StkFloat baseGain_;
  StkFloat gains_[MAX_BANDED_MODES];
  StkFloat basegains_[MAX_BANDED_MODES];
  StkFloat excitation_[MAX_BANDED_MODES];
  StkFloat integrationConstant_;
  StkFloat velocityInput_;
  StkFloat bowVelocity_;
  StkFloat bowTarget_;
  StkFloat bowPosition_;
  StkFloat strikeAmp_;
  int strikePosition_;

};

#endif