e1lama/stk
1
0
Fork 0
mirror of https://github.com/thestk/stk synced 2026-01-12 20:41:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

Version 4.1

Browse Source
This commit is contained in:
Gary Scavone
2009-03-24 23:02:12 -04:00
committed by Stephen Sinclair
parent 81475b04c5
commit 2f09fcd019
279 changed files with 36223 additions and 25364 deletions
Download Patch File Download Diff File Expand all files Collapse all files

198
src/OneZero.cpp
View File

@@ -1,99 +1,99 @@
/***************************************************/
/*! \class OneZero
\brief STK one-zero filter class.
This protected Filter subclass implements
a one-zero digital filter. A method is
provided for setting the zero position
along the real axis of the z-plane while
maintaining a constant filter gain.
by Perry R. Cook and Gary P. Scavone, 1995 - 2002.
*/
/***************************************************/
#include "OneZero.h"
OneZero :: OneZero() : Filter()
{
MY_FLOAT B[2] = {0.5, 0.5};
MY_FLOAT A = 1.0;
Filter::setCoefficients( 2, B, 1, &A );
}
OneZero :: OneZero(MY_FLOAT theZero) : Filter()
{
MY_FLOAT B[2];
MY_FLOAT A = 1.0;
// Normalize coefficients for unity gain.
if (theZero > 0.0)
B[0] = 1.0 / ((MY_FLOAT) 1.0 + theZero);
else
B[0] = 1.0 / ((MY_FLOAT) 1.0 - theZero);
B[1] = -theZero * B[0];
Filter::setCoefficients( 2, B, 1, &A );
}
OneZero :: ~OneZero(void)
{
}
void OneZero :: clear(void)
{
Filter::clear();
}
void OneZero :: setB0(MY_FLOAT b0)
{
b[0] = b0;
}
void OneZero :: setB1(MY_FLOAT b1)
{
b[1] = b1;
}
void OneZero :: setZero(MY_FLOAT theZero)
{
// Normalize coefficients for unity gain.
if (theZero > 0.0)
b[0] = 1.0 / ((MY_FLOAT) 1.0 + theZero);
else
b[0] = 1.0 / ((MY_FLOAT) 1.0 - theZero);
b[1] = -theZero * b[0];
}
void OneZero :: setGain(MY_FLOAT theGain)
{
Filter::setGain(theGain);
}
MY_FLOAT OneZero :: getGain(void) const
{
return Filter::getGain();
}
MY_FLOAT OneZero :: lastOut(void) const
{
return Filter::lastOut();
}
MY_FLOAT OneZero :: tick(MY_FLOAT sample)
{
inputs[0] = gain * sample;
outputs[0] = b[1] * inputs[1] + b[0] * inputs[0];
inputs[1] = inputs[0];
return outputs[0];
}
MY_FLOAT *OneZero :: tick(MY_FLOAT *vector, unsigned int vectorSize)
{
for (unsigned int i=0; i<vectorSize; i++)
vector[i] = tick(vector[i]);
return vector;
}
/***************************************************/
/*! \class OneZero
\brief STK one-zero filter class.
This protected Filter subclass implements
a one-zero digital filter. A method is
provided for setting the zero position
along the real axis of the z-plane while
maintaining a constant filter gain.
by Perry R. Cook and Gary P. Scavone, 1995 - 2002.
*/
/***************************************************/
#include "OneZero.h"
OneZero :: OneZero() : Filter()
{
MY_FLOAT B[2] = {0.5, 0.5};
MY_FLOAT A = 1.0;
Filter::setCoefficients( 2, B, 1, &A );
}
OneZero :: OneZero(MY_FLOAT theZero) : Filter()
{
MY_FLOAT B[2];
MY_FLOAT A = 1.0;
// Normalize coefficients for unity gain.
if (theZero > 0.0)
B[0] = 1.0 / ((MY_FLOAT) 1.0 + theZero);
else
B[0] = 1.0 / ((MY_FLOAT) 1.0 - theZero);
B[1] = -theZero * B[0];
Filter::setCoefficients( 2, B, 1, &A );
}
OneZero :: ~OneZero(void)
{
}
void OneZero :: clear(void)
{
Filter::clear();
}
void OneZero :: setB0(MY_FLOAT b0)
{
b[0] = b0;
}
void OneZero :: setB1(MY_FLOAT b1)
{
b[1] = b1;
}
void OneZero :: setZero(MY_FLOAT theZero)
{
// Normalize coefficients for unity gain.
if (theZero > 0.0)
b[0] = 1.0 / ((MY_FLOAT) 1.0 + theZero);
else
b[0] = 1.0 / ((MY_FLOAT) 1.0 - theZero);
b[1] = -theZero * b[0];
}
void OneZero :: setGain(MY_FLOAT theGain)
{
Filter::setGain(theGain);
}
MY_FLOAT OneZero :: getGain(void) const
{
return Filter::getGain();
}
MY_FLOAT OneZero :: lastOut(void) const
{
return Filter::lastOut();
}
MY_FLOAT OneZero :: tick(MY_FLOAT sample)
{
inputs[0] = gain * sample;
outputs[0] = b[1] * inputs[1] + b[0] * inputs[0];
inputs[1] = inputs[0];
return outputs[0];
}
MY_FLOAT *OneZero :: tick(MY_FLOAT *vector, unsigned int vectorSize)
{
for (unsigned int i=0; i<vectorSize; i++)
vector[i] = tick(vector[i]);
return vector;
}