mirror of
https://github.com/cookiengineer/audacity
synced 2025-10-31 14:13:50 +01:00
53 lines
923 B
C++
53 lines
923 B
C++
/***************************************************/
|
|
/*! \class PitShift
|
|
\brief STK simple pitch shifter effect class.
|
|
|
|
This class implements a simple pitch shifter
|
|
using delay lines.
|
|
|
|
by Perry R. Cook and Gary P. Scavone, 1995 - 2005.
|
|
*/
|
|
/***************************************************/
|
|
|
|
#ifndef STK_PITSHIFT_H
|
|
#define STK_PITSHIFT_H
|
|
|
|
#include "Effect.h"
|
|
#include "DelayL.h"
|
|
|
|
namespace Nyq
|
|
{
|
|
|
|
class PitShift : public Effect
|
|
{
|
|
public:
|
|
//! Class constructor.
|
|
PitShift();
|
|
|
|
//! Class destructor.
|
|
~PitShift();
|
|
|
|
//! Reset and clear all internal state.
|
|
void clear();
|
|
|
|
//! Set the pitch shift factor (1.0 produces no shift).
|
|
void setShift(StkFloat shift);
|
|
|
|
protected:
|
|
|
|
StkFloat computeSample( StkFloat input );
|
|
|
|
DelayL delayLine_[2];
|
|
StkFloat delay_[2];
|
|
StkFloat env_[2];
|
|
StkFloat rate_;
|
|
unsigned long delayLength;
|
|
unsigned long halfLength;
|
|
|
|
};
|
|
|
|
} // namespace Nyq
|
|
|
|
#endif
|
|
|