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https://github.com/DSheirer/sdrtrunk.git
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70e62ebb35
component. -Airspy supported with 10 and 2.5 MSps sample rates. Additional decimation may be added later. -Spectral display updated to include smoothing and filtering options. Note: the decimated output of a tuner channel from the airspy is 48,076.9 samples per second, versus the normal 48 kHz decimated rate. This is 1.0015 times the normal rate and doesn't appear to impact the decoders or audio processing. Therefore, no fractional resampling has been added.
63 lines
1.9 KiB
Java
63 lines
1.9 KiB
Java
/*******************************************************************************
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* SDR Trunk
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* Copyright (C) 2014 Dennis Sheirer
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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******************************************************************************/
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package sample.adapter;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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/**
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* Converts 16-bit little endian byte data into an array of floats
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*/
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public class ShortAdapter implements ISampleAdapter
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{
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private ShortToFloatMap mMap = new ShortToFloatMap();
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private ByteOrder mByteOrder = ByteOrder.LITTLE_ENDIAN;
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@Override
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public float[] convert( byte[] samples )
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{
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float[] processed = new float[ samples.length / 2 ];
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int pointer = 0;
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/* Wrap byte array in a byte buffer so we can process them as shorts */
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ByteBuffer buffer = ByteBuffer.wrap( samples );
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/* Set endian to correct byte ordering */
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buffer.order( mByteOrder );
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while( buffer.hasRemaining() )
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{
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processed[ pointer ] = mMap.get( buffer.getShort() );
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pointer++;
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}
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return processed;
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}
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/**
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* Set byte interpretation to little or big endian. Defaults to LITTLE
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* endian
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*/
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public void setByteOrder( ByteOrder order )
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{
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mByteOrder = order;
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}
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}
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