Noise.h

#ifndef STK_NOISE_H
#define STK_NOISE_H
 
#include "Generator.h"
#include <stdlib.h>
 
namespace stk {
 
/***************************************************/
/***************************************************/
 
class Noise : public Generator
{
public:
 
 
  Noise( unsigned int seed = 0 );
 
 
  void setSeed( unsigned int seed = 0 );
 
  StkFloat lastOut( void ) const { return lastFrame_[0]; };
 
  StkFloat tick( void );
 
 
  StkFrames& tick( StkFrames& frames, unsigned int channel = 0 );
 
protected:
 
};
 
inline StkFloat Noise :: tick( void )
{
  return lastFrame_[0] = (StkFloat) ( 2.0 * rand() / (RAND_MAX + 1.0) - 1.0 );
}
 
inline StkFrames& Noise :: tick( StkFrames& frames, unsigned int channel )
{
#if defined(_STK_DEBUG_)
  if ( channel >= frames.channels() ) {
    oStream_ << "Noise::tick(): channel and StkFrames arguments are incompatible!";
    handleError( StkError::FUNCTION_ARGUMENT );
  }
#endif
 
  StkFloat *samples = &frames[channel];
  unsigned int hop = frames.channels();
  for ( unsigned int i=0; i<frames.frames(); i++, samples += hop )
    *samples = (StkFloat) ( 2.0 * rand() / (RAND_MAX + 1.0) - 1.0 );
 
  lastFrame_[0] = *(samples-hop);
  return frames;
}
 
} // stk namespace
 
#endif