Effect.h

#ifndef STK_EFFECT_H
#define STK_EFFECT_H
 
#include "Stk.h"
#include <cmath>
 
namespace stk {
 
/***************************************************/
/***************************************************/
 
class Effect : public Stk
{
 public:
  Effect( void ) { lastFrame_.resize( 1, 1, 0.0 ); };
 
  unsigned int channelsOut( void ) const { return lastFrame_.channels(); };
 
  const StkFrames& lastFrame( void ) const { return lastFrame_; };
 
  virtual void clear() = 0;
 
  virtual void setEffectMix( StkFloat mix );
 
  virtual StkFloat tick (StkFloat input, unsigned int channel=0)=0;
 
 
 protected:
 
  // Returns true if argument value is prime.
  bool isPrime( unsigned int number );
 
  StkFrames lastFrame_;
  StkFloat effectMix_;
 
};
 
inline void Effect :: setEffectMix( StkFloat mix )
{
  if ( mix < 0.0 ) {
    oStream_ << "Effect::setEffectMix: mix parameter is less than zero ... setting to zero!";
    handleError( StkError::WARNING );
    effectMix_ = 0.0;
  }
  else if ( mix > 1.0 ) {
    oStream_ << "Effect::setEffectMix: mix parameter is greater than 1.0 ... setting to one!";
    handleError( StkError::WARNING );
    effectMix_ = 1.0;
  }
  else
    effectMix_ = mix;
}
 
inline bool Effect :: isPrime( unsigned int number )
{
  if ( number == 2 ) return true;
  if ( number & 1 ) {
           for ( int i=3; i<(int)sqrt((double)number)+1; i+=2 )
                    if ( (number % i) == 0 ) return false;
           return true; // prime
         }
  else return false; // even
}
 
} // stk namespace
 
#endif