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java.lang.Object jass.generators.Butter2LowFilter
public class Butter2LowFilter
Second order Butterworth lowpass filter.
Field Summary | |
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protected float |
A
Gain. |
protected float |
A0
Gain. |
protected float |
cc
Coefficients (Steiglitz notation). |
protected float |
dd
Coefficients (Steiglitz notation). |
protected float |
f
Cutoff frequency in Hertz. |
protected float |
gain
Gain. |
protected float |
srate
Sampling rate in Hertz. |
Constructor Summary | |
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Butter2LowFilter(float srate)
Create and initialize. |
Method Summary | |
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void |
filter(float[] output,
float[] input,
int nsamples,
int inputOffset)
Proces input (may be same as output). |
void |
reset()
Reset state. |
void |
reset(float c)
Reset state. |
void |
setCutoffFrequency(float f)
Set the filter cutoff. |
void |
setGain(float gain)
Set gain. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected float srate
protected float f
protected float cc
protected float dd
protected float A
protected float A0
protected float gain
Constructor Detail |
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public Butter2LowFilter(float srate)
srate
- sampling rate in Hertz.Method Detail |
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public void setCutoffFrequency(float f)
f
- cutoff frequency in Hertz.public void setGain(float gain)
gain
- gain.public void reset()
public void reset(float c)
c
- value of constant statepublic void filter(float[] output, float[] input, int nsamples, int inputOffset)
filter
in interface Filter
output
- user provided buffer for returned result.input
- user provided input buffer.nsamples
- number of samples written to output buffer.inputOffset
- where to start in circular buffer input.
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