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Updated spectral display to used dBm scale and removed baseline/amplification items.

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Updated sample handling code to use -1.0 to 1.0 float values throughout, to support P25 decoder and symbol filter.
This commit is contained in:
dennis.sheirer
2014-11-01 17:39:06 +00:00
parent 86f374bb88
commit ae0568ff3b
34 changed files with 821 additions and 412 deletions
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2
src/source/tuner/hackrf/HackRFTunerController.java
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@@ -79,11 +79,11 @@ import org.usb4java.Transfer;
import org.usb4java.TransferCallback;
import sample.Listener;
import sample.adapter.ByteSampleAdapter;
import sample.complex.ComplexBuffer;
import source.SourceException;
import source.tuner.TunerConfiguration;
import source.tuner.TunerController;
import source.tuner.rtl.ByteSampleAdapter;
public class HackRFTunerController extends TunerController

57
src/source/tuner/rtl/ByteSampleAdapter.java
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@@ -1,57 +0,0 @@
/*******************************************************************************
* SDR Trunk
* Copyright (C) 2014 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
******************************************************************************/
package source.tuner.rtl;
import sample.adapter.SampleAdapter;
import sample.complex.ComplexBuffer;
public class ByteSampleAdapter extends SampleAdapter
{
private final static float[] LOOKUP_VALUES;
/**
* Creates a static lookup table that converts the 8-bit valued range
* from 0 - 255 into scaled float values of -32768.0 to 0 to 32512.0
*/
static
{
LOOKUP_VALUES = new float[ 256 ];
for( int x = 0; x < 256; x++ )
{
LOOKUP_VALUES[ x ] = (float)( x - 128 ) * 256.0f;
}
LOOKUP_VALUES[ 128 ] = 0.0000001f;
}
@Override
public float[] convert( byte[] samples )
{
float[] convertedSamples = new float[ samples.length ];
int pointer = 0;
for( byte sample: samples )
{
/* Convert byte value into float from the lookup table */
convertedSamples[ pointer++ ] = LOOKUP_VALUES[ ( sample & 0xFF ) ];
}
return convertedSamples;
}
}

1
src/source/tuner/rtl/RTL2832TunerController.java
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@@ -52,6 +52,7 @@ import org.usb4java.Transfer;
import org.usb4java.TransferCallback;
import sample.Listener;
import sample.adapter.ByteSampleAdapter;
import sample.complex.ComplexBuffer;
import source.SourceException;
import source.tuner.FrequencyChangeEvent;