stk::ReedTable Class Reference

STK reed table class. More...

#include <ReedTable.h>

Inheritance diagram for stk::ReedTable:

Public Member Functions
	ReedTable (void)
	Default constructor.
void	setOffset (StkFloat offset)
	Set the table offset value.
void	setSlope (StkFloat slope)
	Set the table slope value.
StkFloat	tick (StkFloat input)
	Take one sample input and map to one sample of output.
StkFrames &	tick (StkFrames &frames, unsigned int channel=0)
	Take a channel of the StkFrames object as inputs to the table and replace with corresponding outputs.
StkFrames &	tick (StkFrames &iFrames, StkFrames &oFrames, unsigned int iChannel=0, unsigned int oChannel=0)
	Take a channel of the iFrames object as inputs to the table and write outputs to the oFrames object.
Public Member Functions inherited from stk::Function
	Function (void)
	Class constructor.
StkFloat	lastOut (void) const
	Return the last computed output sample.
virtual StkFloat	tick (StkFloat input)=0
	Take one sample input and compute one sample of output.
Public Member Functions inherited from stk::Stk
void	ignoreSampleRateChange (bool ignore=true)
	A function to enable/disable the automatic updating of class data when the STK sample rate changes.

Additional Inherited Members
Static Public Member Functions inherited from stk::Stk
static StkFloat	sampleRate (void)
	Static method that returns the current STK sample rate.
static void	setSampleRate (StkFloat rate)
	Static method that sets the STK sample rate.
static void	clear_alertList ()
	Static method that frees memory from alertList_.
static std::string	rawwavePath (void)
	Static method that returns the current rawwave path.
static void	setRawwavePath (std::string path)
	Static method that sets the STK rawwave path.
static void	swap16 (unsigned char *ptr)
	Static method that byte-swaps a 16-bit data type.
static void	swap32 (unsigned char *ptr)
	Static method that byte-swaps a 32-bit data type.
static void	swap64 (unsigned char *ptr)
	Static method that byte-swaps a 64-bit data type.
static void	sleep (unsigned long milliseconds)
	Static cross-platform method to sleep for a number of milliseconds.
static bool	inRange (StkFloat value, StkFloat min, StkFloat max)
	Static method to check whether a value is within a specified range.
static void	handleError (const char *message, StkError::Type type)
	Static function for error reporting and handling using c-strings.
static void	handleError (std::string message, StkError::Type type)
	Static function for error reporting and handling using c++ strings.
static void	showWarnings (bool status)
	Toggle display of WARNING and STATUS messages.
static void	printErrors (bool status)
	Toggle display of error messages before throwing exceptions.
Static Public Attributes inherited from stk::Stk
static const StkFormat	STK_SINT8
static const StkFormat	STK_SINT16
static const StkFormat	STK_SINT24
static const StkFormat	STK_SINT32
static const StkFormat	STK_FLOAT32
static const StkFormat	STK_FLOAT64
Protected Member Functions inherited from stk::Stk
	Stk (void)
	Default constructor.
virtual	~Stk (void)
	Class destructor.
virtual void	sampleRateChanged (StkFloat newRate, StkFloat oldRate)
	This function should be implemented in subclasses that depend on the sample rate.
void	addSampleRateAlert (Stk *ptr)
	Add class pointer to list for sample rate change notification.
void	removeSampleRateAlert (Stk *ptr)
	Remove class pointer from list for sample rate change notification.
void	handleError (StkError::Type type) const
	Internal function for error reporting that assumes message in oStream_ variable.

Detailed Description

STK reed table class.

This class implements a simple one breakpoint, non-linear reed function, as described by Smith (1986). This function is based on a memoryless non-linear spring model of the reed (the reed mass is ignored) which saturates when the reed collides with the mouthpiece facing.

See McIntyre, Schumacher, & Woodhouse (1983), Smith (1986), Hirschman, Cook, Scavone, and others for more information.

by Perry R. Cook and Gary P. Scavone, 1995–2023.

Member Function Documentation

setOffset()

void stk::ReedTable::setOffset ( StkFloat  offset )

inline

Set the table offset value.

The table offset roughly corresponds to the size of the initial reed tip opening (a greater offset represents a smaller opening).

{ offset_ = offset; };

setSlope()

void stk::ReedTable::setSlope ( StkFloat  slope )

inline

Set the table slope value.

The table slope roughly corresponds to the reed stiffness (a greater slope represents a harder reed).

{ slope_ = slope; };

tick() [1/2]

StkFrames & stk::ReedTable::tick ( StkFrames &  frames, unsigned int  channel = 0  )

inline

Take a channel of the StkFrames object as inputs to the table and replace with corresponding outputs.

The StkFrames argument reference is returned. The channel argument must be less than the number of channels in the StkFrames argument (the first channel is specified by 0). However, range checking is only performed if STK_DEBUG is defined during compilation, in which case an out-of-range value will trigger an StkError exception.

{
#if defined(_STK_DEBUG_)
  if ( channel >= frames.channels() ) {
    oStream_ << "ReedTable::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 = offset_ + (slope_ * *samples);
    if ( *samples > 1.0) *samples = 1.0;
    if ( *samples < -1.0) *samples = -1.0;
  }
 
  lastFrame_[0] = *(samples-hop);
  return frames;
}

tick() [2/2]

StkFrames & stk::ReedTable::tick ( StkFrames &  iFrames, StkFrames &  oFrames, unsigned int  iChannel = 0, unsigned int  oChannel = 0  )

inline

Take a channel of the iFrames object as inputs to the table and write outputs to the oFrames object.

The iFrames object reference is returned. Each channel argument must be less than the number of channels in the corresponding StkFrames argument (the first channel is specified by 0). However, range checking is only performed if STK_DEBUG is defined during compilation, in which case an out-of-range value will trigger an StkError exception.

{
#if defined(_STK_DEBUG_)
  if ( iChannel >= iFrames.channels() || oChannel >= oFrames.channels() ) {
    oStream_ << "ReedTable::tick(): channel and StkFrames arguments are incompatible!";
    handleError( StkError::FUNCTION_ARGUMENT );
  }
#endif
 
  StkFloat *iSamples = &iFrames[iChannel];
  StkFloat *oSamples = &oFrames[oChannel];
  unsigned int iHop = iFrames.channels(), oHop = oFrames.channels();
  for ( unsigned int i=0; i<iFrames.frames(); i++, iSamples += iHop, oSamples += oHop ) {
    *oSamples = offset_ + (slope_ * *iSamples);
    if ( *oSamples > 1.0) *oSamples = 1.0;
    if ( *oSamples < -1.0) *oSamples = -1.0;
  }
 
  lastFrame_[0] = *(oSamples-oHop);
  return iFrames;
}

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The documentation for this class was generated from the following file:

• ReedTable.h