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Code Issues Packages Projects Releases 2 Wiki Activity

Resolves #186 - p25 C4FM decoder wasn't working (at all).

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Denny
2017-02-11 07:17:23 -05:00
parent 9cc0d367a8
commit fce3d5c4f3
4 changed files with 95 additions and 108 deletions
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136
src/dsp/filter/design/FilterViewer.java
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@@ -1,65 +1,64 @@
package dsp.filter.design;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import dsp.filter.fir.FIRFilterSpecification;
import dsp.filter.fir.remez.RemezFIRFilterDesigner;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.stage.Stage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class FilterViewer extends Application
{
private final static Logger mLog = LoggerFactory.getLogger( FilterViewer.class );
private final static Logger mLog = LoggerFactory.getLogger(FilterViewer.class);
/**
* Developer tool to visualize filter designs
*/
public FilterViewer()
{
}
@Override
public void start( Stage primaryStage ) throws Exception
{
Scene scene = new Scene( new FilterView( getFilter() ) );
primaryStage.setTitle( "Filter Viewer" );
primaryStage.setScene( scene );
primaryStage.show();
}
public static void main( String[] args )
{
launch( args );
}
/**
* Developer tool to visualize filter designs
*/
public FilterViewer()
{
}
/**
* Provides the filter to visualize. Modify this method to visualize your filter design.
*/
private float[] getFilter()
{
// FIRFilterSpecification specification = FIRFilterSpecification.lowPassBuilder()
// .sampleRate( 48000 )
// .gridDensity( 16 )
// .passBandCutoff( 3200 )
// .passBandAmplitude( 1.0 )
// .passBandRipple( 0.02 )
// .stopBandStart( 4000 )
// .stopBandAmplitude( 0.0 )
// .stopBandRipple( 0.03 )
// .build();
FIRFilterSpecification specification = FIRFilterSpecification.highPassBuilder()
.sampleRate( 24000 )
.stopBandCutoff( 800 )
.stopBandAmplitude( 0.0 )
.stopBandRipple( 0.03 )
.passBandStart( 1000 )
.passBandAmplitude( 1.0 )
.passBandRipple( 0.08 )
.build();
@Override
public void start(Stage primaryStage) throws Exception
{
Scene scene = new Scene(new FilterView(getFilter()));
primaryStage.setTitle("Filter Viewer");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args)
{
launch(args);
}
/**
* Provides the filter to visualize. Modify this method to visualize your filter design.
*/
private float[] getFilter()
{
FIRFilterSpecification specification = FIRFilterSpecification.lowPassBuilder()
.sampleRate(48000)
.gridDensity(16)
.passBandCutoff(2500)
.passBandAmplitude(1.0)
.passBandRipple(0.01)
.stopBandStart(4000)
.stopBandAmplitude(0.0)
.stopBandRipple(0.008)
.build();
// FIRFilterSpecification specification = FIRFilterSpecification.highPassBuilder()
// .sampleRate(24000)
// .stopBandCutoff(800)
// .stopBandAmplitude(0.0)
// .stopBandRipple(0.03)
// .passBandStart(1000)
// .passBandAmplitude(1.0)
// .passBandRipple(0.08)
// .build();
// FIRFilterSpecification specification = FIRFilterSpecification.bandPassBuilder()
// .sampleRate( 48000 )
@@ -71,24 +70,25 @@ public class FilterViewer extends Application
// .passRipple( 0.008)
// .build();
float[] taps = null;
float[] taps = null;
// taps = FilterFactory.getLowPass( 16000, 2400, 73, WindowType.HANNING );
// taps = FilterFactory.getLowPass(48000, 6750, 7500, 60,
// Window.WindowType.HAMMING, true);
try
{
RemezFIRFilterDesigner designer = new RemezFIRFilterDesigner( specification );
if( designer.isValid() )
{
taps = designer.getImpulseResponse();
}
}
catch( FilterDesignException fde )
{
mLog.error( "Filter design error", fde );
}
return taps;
}
try
{
RemezFIRFilterDesigner designer = new RemezFIRFilterDesigner(specification);
if(designer.isValid())
{
taps = designer.getImpulseResponse();
}
}
catch(FilterDesignException fde)
{
mLog.error("Filter design error", fde);
}
return taps;
}
}