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https://github.com/DSheirer/sdrtrunk.git
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39f6d6c831
* Misc minor performance improvements * Use more concise loop syntax * Use more concise Collection sort syntax * Use StringUtils pad methods * Optimize some loops and double-map-lookups * Optimize array instantiation There are two styles to convert a collection to an array: either using a pre-sized array (like c.toArray(new String[c.size()])) or using an empty array (like c.toArray(new String[0]). In older Java versions using pre-sized array was recommended, as the reflection call which is necessary to create an array of proper size was quite slow. However since late updates of OpenJDK 6 this call was intrinsified, making the performance of the empty array version the same and sometimes even better, compared to the pre-sized version. Also passing pre-sized array is dangerous for a concurrent or synchronized collection as a data race is possible between the size and toArray call which may result in extra nulls at the end of the array, if the collection was concurrently shrunk during the operation. * Cleanup string concatenation * Use EnumMap where possible * Use FastMath instead of Math * Initialize complex things only once * Reduce method size to aloow more JIT inlining * remove map of short->float * Move field to local variable * Cleanup Map lookup Co-authored-by: Rob Ekl <xwq876@zebra.com>
81 lines
3.0 KiB
Java
81 lines
3.0 KiB
Java
/*
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*
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* * ******************************************************************************
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* * Copyright (C) 2014-2019 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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*
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*
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*/
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package io.github.dsheirer.dsp.psk;
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import io.github.dsheirer.sample.complex.Complex;
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import io.github.dsheirer.sample.complex.ComplexSampleListener;
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import org.apache.commons.math3.util.FastMath;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class InterpolatingSampleBufferInstrumented extends InterpolatingSampleBuffer
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{
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private final static Logger mLog = LoggerFactory.getLogger(InterpolatingSampleBufferInstrumented.class);
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private SymbolDecisionData mSymbolDecisionData;
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private ComplexSampleListener mSampleListener;
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private int mBufferLength;
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public InterpolatingSampleBufferInstrumented(float samplesPerSymbol, float symbolTimingGain)
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{
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super(samplesPerSymbol, symbolTimingGain);
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mBufferLength = (int) FastMath.ceil(samplesPerSymbol);
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mSymbolDecisionData = new SymbolDecisionData(mBufferLength);
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}
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public void receive(Complex sample)
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{
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super.receive(sample);
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mSymbolDecisionData.receive(sample);
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if(mSampleListener != null)
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{
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mSampleListener.receive(sample.inphase(), sample.quadrature());
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}
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}
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/**
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* Contents of the interpolating buffer and the current buffer index and symbol decision offset. This data can
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* be used to support an external eye-diagram chart.
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* @return symbol decision data.
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*/
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public SymbolDecisionData getSymbolDecisionData()
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{
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for(int x = mDelayLinePointer; x < mDelayLinePointer + mBufferLength; x++)
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{
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mSymbolDecisionData.receive(mDelayLineInphase[x], mDelayLineQuadrature[x]);
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}
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mSymbolDecisionData.setSamplingPoint(getSamplingPoint());
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return mSymbolDecisionData;
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}
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/**
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* Sets the listener to receive samples being sent to this buffer. Note: these samples have
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* already been corrected by the PLL, so this provides an ideal tap point for PLL corrected samples.
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* @param listener to receive samples.
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*/
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public void setSampleListener(ComplexSampleListener listener)
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{
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mSampleListener = listener;
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}
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}
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