mirror of
https://github.com/DSheirer/sdrtrunk.git
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Initial commit of redesigned internal processing and audio management.
Note: Several of the decoders are currently non-functioning in this commit. If you want the latest functioning codebase, please checkout the commit prior to this one. All decoders will eventually be updated with this new architecture. Currently broken: - Logging and recording - Aux decoders (Fleetsync/MDC/LoJack/Tait) - LTR/Passport decoders Changes in this commit: - Module architecture for decoders and components with central provisioning by the DecoderFactory - Transition from Complex sample stream processing to float buffer processing for improved memory management - Redesigned filter structures - to support buffers and streams - Resolved several memory leak issues - Universal sharing of the thread pool manager - Added centralized audio management with call/user prioritization and new gui with mute/volume controls - Embedded audio metadata for eventual streaming support - Redesigned ProcessingChain to support independent re-use - Added new TrafficChannelManager to handle traffic channel allocations - Traffic Channel pool size and Call timeout available in P25 and MPT1327 configs - Redesigned channel and decoder gui components
This commit is contained in:
denny
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src/module/decode/p25/P25_LSMDecoder.java
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205
src/module/decode/p25/P25_LSMDecoder.java
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/*******************************************************************************
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* SDR Trunk
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* Copyright (C) 2014,2015 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 module.decode.p25;
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import instrument.tap.Tap;
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import instrument.tap.stream.ComplexSampleTap;
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import instrument.tap.stream.ComplexTap;
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import instrument.tap.stream.DibitTap;
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import instrument.tap.stream.FloatTap;
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import instrument.tap.stream.QPSKTap;
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import java.util.ArrayList;
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import java.util.List;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import controller.channel.Channel.ChannelType;
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import sample.Listener;
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import sample.complex.ComplexBuffer;
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import sample.complex.ComplexBufferToStreamConverter;
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import sample.complex.IComplexBufferListener;
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import source.tuner.frequency.FrequencyCorrectionControl;
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import alias.AliasList;
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import dsp.filter.FilterFactory;
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import dsp.filter.Window.WindowType;
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import dsp.filter.fir.complex.ComplexFIRFilter_CB_CB;
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import dsp.gain.ComplexFeedForwardGainControl;
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import dsp.psk.CQPSKDemodulator;
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import dsp.psk.QPSKPolarSlicer;
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public class P25_LSMDecoder extends P25Decoder implements IComplexBufferListener
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{
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private final static Logger mLog = LoggerFactory.getLogger( P25_LSMDecoder.class );
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/* Instrumentation Taps */
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private static final String INSTRUMENT_BASEBAND_FILTER_OUTPUT = "Tap Point: Baseband Filter Output";
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private static final String INSTRUMENT_AGC_OUTPUT = "Tap Point: AGC Output";
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private static final String INSTRUMENT_QPSK_DEMODULATOR_OUTPUT = "Tap Point: CQPSK Demodulator Output";
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private static final String INSTRUMENT_CQPSK_SLICER_OUTPUT = "Tap Point: CQPSK Slicer Output";
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private List<Tap> mAvailableTaps;
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private ComplexFIRFilter_CB_CB mBasebandFilter;
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private ComplexBufferToStreamConverter mStreamConverter =
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new ComplexBufferToStreamConverter();
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private ComplexFeedForwardGainControl mAGC =
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new ComplexFeedForwardGainControl( 32 );
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private CQPSKDemodulator mCQPSKDemodulator = new CQPSKDemodulator();
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private QPSKPolarSlicer mCQPSKSlicer = new QPSKPolarSlicer();
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private P25MessageFramer mMessageFramer;
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public P25_LSMDecoder( AliasList aliasList, ChannelType channelType )
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{
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super( aliasList, channelType );
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mBasebandFilter = new ComplexFIRFilter_CB_CB( FilterFactory.getLowPass(
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48000, 7250, 8000, 60, WindowType.HANNING, true ), 1.0f );
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mBasebandFilter.setListener( mStreamConverter );
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mStreamConverter.setListener( mAGC );
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mAGC.setListener( mCQPSKDemodulator );
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mCQPSKDemodulator.setSymbolListener( mCQPSKSlicer );
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mCQPSKSlicer.addListener( mMessageFramer );
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mMessageFramer = new P25MessageFramer( aliasList, mCQPSKDemodulator );
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mCQPSKSlicer.addListener( mMessageFramer );
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mMessageFramer.setListener( getMessageProcessor() );
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}
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@Override
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public Listener<ComplexBuffer> getComplexBufferListener()
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{
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return mBasebandFilter;
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}
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public Modulation getModulation()
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{
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return Modulation.CQPSK;
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}
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@Override
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public boolean hasFrequencyCorrectionControl()
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{
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return false;
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}
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@Override
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public FrequencyCorrectionControl getFrequencyCorrectionControl()
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{
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return null;
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}
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/**
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* Provides a list of instrumentation taps for monitoring internal processing
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*/
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@Override
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public List<Tap> getTaps()
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{
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if( mAvailableTaps == null )
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{
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mAvailableTaps = new ArrayList<Tap>();
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mAvailableTaps.add( new ComplexTap( INSTRUMENT_BASEBAND_FILTER_OUTPUT, 0, 1.0f ) );
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mAvailableTaps.add( new ComplexTap( INSTRUMENT_AGC_OUTPUT, 0, 1.0f ) );
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mAvailableTaps.add( new QPSKTap( INSTRUMENT_QPSK_DEMODULATOR_OUTPUT, 0, 1.0f ) );
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mAvailableTaps.add( new DibitTap( INSTRUMENT_CQPSK_SLICER_OUTPUT, 0, 0.1f ) );
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if( mCQPSKDemodulator != null )
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{
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mAvailableTaps.addAll( mCQPSKDemodulator.getTaps() );
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}
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}
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return mAvailableTaps;
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}
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/**
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* Adds the instrumentation tap
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*/
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@Override
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public void addTap( Tap tap )
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{
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if( mCQPSKDemodulator != null )
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{
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mCQPSKDemodulator.addTap( tap );
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}
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switch( tap.getName() )
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{
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case INSTRUMENT_BASEBAND_FILTER_OUTPUT:
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ComplexSampleTap baseband = (ComplexSampleTap)tap;
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mStreamConverter.setListener( baseband );
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baseband.setListener( mAGC );
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break;
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case INSTRUMENT_AGC_OUTPUT:
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ComplexSampleTap agcSymbol = (ComplexSampleTap)tap;
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mAGC.setListener( agcSymbol );
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agcSymbol.setListener( mCQPSKDemodulator );
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break;
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case INSTRUMENT_QPSK_DEMODULATOR_OUTPUT:
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QPSKTap qpsk = (QPSKTap)tap;
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mCQPSKDemodulator.setSymbolListener( qpsk );
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qpsk.setListener( mCQPSKSlicer );
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break;
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case INSTRUMENT_CQPSK_SLICER_OUTPUT:
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mCQPSKSlicer.addListener( (DibitTap)tap );
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break;
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default:
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throw new IllegalArgumentException( "Unrecognized tap: " +
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tap.getName() );
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}
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}
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/**
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* Removes the instrumentation tap
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*/
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@Override
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public void removeTap( Tap tap )
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{
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if( mCQPSKDemodulator != null )
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{
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mCQPSKDemodulator.removeTap( tap );
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}
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switch( tap.getName() )
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{
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case INSTRUMENT_BASEBAND_FILTER_OUTPUT:
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mStreamConverter.setListener( mAGC );
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break;
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case INSTRUMENT_AGC_OUTPUT:
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mAGC.setListener( mCQPSKDemodulator );
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break;
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case INSTRUMENT_QPSK_DEMODULATOR_OUTPUT:
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mCQPSKDemodulator.setSymbolListener( mCQPSKSlicer );
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break;
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case INSTRUMENT_CQPSK_SLICER_OUTPUT:
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mCQPSKSlicer.removeListener( (DibitTap)tap );
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break;
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default:
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throw new IllegalArgumentException( "Unrecognized tap: " +
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tap.getName() );
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}
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}
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}
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