simple.h

来自「Mobile STK for Symbian OS V0.1」· C头文件 代码 · 共 80 行

/***************************************************/
/*! \class Simple
    \brief STK wavetable/noise instrument.

    This class combines a looped wave, a
    noise source, a biquad resonance filter,
    a one-pole filter, and an ADSR envelope
    to create some interesting sounds.

    Control Change Numbers: 
       - Filter Pole Position = 2
       - Noise/Pitched Cross-Fade = 4
       - Envelope Rate = 11
       - Gain = 128

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

#ifndef STK_SIMPLE_H
#define STK_SIMPLE_H

#include "Instrmnt.h"
//#if !defined(SYMBIAN)
#include "ADSR.h"
#include "WaveLoop.h"
#include "OnePole.h"
#include "BiQuad.h"
#include "Noise.h"

class Simple : public Instrmnt
{
 public:
  //! Class constructor.
  /*!
    An StkError will be thrown if the rawwave path is incorrectly set.
  */
  Simple();

  //! Class destructor.
  ~Simple();

  //! Clear internal states.
  void clear();

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

  //! Start envelope toward "on" target.
  void keyOn();

  //! Start envelope toward "off" target.
  void keyOff();

  //! 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 );

  ADSR      adsr_; 
  WaveLoop *loop_;
  OnePole   filter_;
  BiQuad    biquad_;
  Noise     noise_;
  StkFloat  baseFrequency_;
  StkFloat  loopGain_;

};

//#endif // SYMBIAN
#endif