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LogScale< T > Class Template Reference

LogScale class. More...

#include <logscale.h>

Public Member Functions

 LogScale (T srcMin, T srcMax, T destMin, T destMax, T inValue=0.5, T outValue=0.1)
 Constructor. More...
 
 LogScale ()
 Default Constructor with [0, 0.5, 1] => [0, 0.1, 1]. More...
 
void changeScaling (T srcMin, T srcMax, T destMin, T destMax, T inValue, T outValue)
 Applies a new scale setting. More...
 
void scale (T *pIn, T *pOut, int32 nSamples)
 Computes the scale from pIn input buffer to pOut output buffer (pIn and POut could be the same buffer). More...
 
scale (T input) const
 Computes for one given value the scale. More...
 
void invscale (T *pIn, T *pOut, int32 nSamples)
 Computes the inverse scale from pIn input buffer to pOut output buffer (pIn and POut could be the same buffer). More...
 
invscale (T input) const
 Computes for one given value the inverse scale. More...
 
invscaleCheck (T in) const
 Same than invscale with a check of the input. More...
 

Protected Member Functions

void setScaling (T srcMin, T srcMax, T destMin, T destMax, T inValue, T outValue)
 

Protected Attributes

scaleFactor
 
scaleFactorInv
 
srcScale
 
srcScaleInv
 
srcMin
 
expo
 
expoInv
 
destMin
 

Detailed Description

template<class T>
class Steinberg::Vst::LogScale< T >

LogScale class.

Scales [srcMin srcMax] to [destMin destMax]

Scaling curve is defined by given outValue for given inValue

LogScale myLogScale (0, 1, 0, 1, 0.5, 0.1);
means: input and output ranges are the same, but myLogScale.scale (0.5) is 0.1 ([0, 0.5, 1] => [0, 0.1, 1])

LogScale myLogScale (0, 1, 0, 1, 0.5, 0.9);
means: input and output ranges are the same, but myLogScale.scale (0.5) is 0.9 ([0, 0.5, 1] => [0, 0.9, 1])

LogScale myLogScale (0, 1, 80, 22000, 0.5, 2000);
means: input range is between 0 and 1 and output range is between 80 and 22000 and myLogScale.scale (0.5) is 2000 ([0, 0.5, 1] => [80, 2000, 22000])

Constructor & Destructor Documentation

LogScale ( srcMin,
srcMax,
destMin,
destMax,
inValue = 0.5,
outValue = 0.1 
)

Constructor.

LogScale ( )

Default Constructor with [0, 0.5, 1] => [0, 0.1, 1].

Member Function Documentation

void changeScaling ( srcMin,
srcMax,
destMin,
destMax,
inValue,
outValue 
)

Applies a new scale setting.

Note that destMin should be different than destMax! The same for srcMin and srcMax.

void scale ( T *  pIn,
T *  pOut,
int32  nSamples 
)

Computes the scale from pIn input buffer to pOut output buffer (pIn and POut could be the same buffer).

T scale ( input) const

Computes for one given value the scale.

void invscale ( T *  pIn,
T *  pOut,
int32  nSamples 
)

Computes the inverse scale from pIn input buffer to pOut output buffer (pIn and POut could be the same buffer).

T invscale ( input) const

Computes for one given value the inverse scale.

T invscaleCheck ( in) const

Same than invscale with a check of the input.

void setScaling ( srcMin,
srcMax,
destMin,
destMax,
inValue,
outValue 
)
protected

Member Data Documentation

T scaleFactor
protected
T scaleFactorInv
protected
T srcScale
protected
T srcScaleInv
protected
T srcMin
protected
T expo
protected
T expoInv
protected
T destMin
protected
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Copyright ©2019 Steinberg Media Technologies GmbH. All Rights Reserved. This documentation is under this license.