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
191
src/module/decode/lj1200/LJ1200Decoder.java
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191
src/module/decode/lj1200/LJ1200Decoder.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.lj1200;
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import instrument.Instrumentable;
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import instrument.tap.Tap;
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import instrument.tap.stream.BinaryTap;
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import instrument.tap.stream.FloatBufferTap;
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import instrument.tap.stream.FloatTap;
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import java.util.ArrayList;
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import java.util.List;
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import module.decode.Decoder;
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import module.decode.DecoderType;
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import sample.Broadcaster;
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import sample.Listener;
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import sample.real.IRealBufferListener;
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import sample.real.RealBuffer;
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import sample.real.RealSampleListener;
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import alias.AliasList;
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import bits.MessageFramer;
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import bits.SyncPattern;
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import dsp.filter.Filters;
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import dsp.filter.fir.real.RealFIRFilter_RB_RB;
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import dsp.filter.halfband.real.HalfBandFilter_RB_RB;
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import dsp.fsk.FSK2Decoder;
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import dsp.fsk.FSK2Decoder.Output;
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/**
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* LJ1200 - 1200 baud 2FSK decoder
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*/
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public class LJ1200Decoder extends Decoder implements IRealBufferListener,
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Instrumentable
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{
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/* Decimated sample rate ( 48,000 / 2 = 24,000 ) feeding the decoder */
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private static final int DECIMATED_SAMPLE_RATE = 24000;
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/* Baud or Symbol Rate */
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private static final int SYMBOL_RATE = 1200;
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/* Message length - 16-bit sync plus 64 bit message */
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private static final int MESSAGE_LENGTH = 80;
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/* Instrumentation Taps */
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private ArrayList<Tap> mAvailableTaps;
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private static final String INSTRUMENT_BANDPASS_FILTER_TO_FSK2_DEMOD =
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"Tap Point: Bandpass Filter > < FSK2 Decoder";
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private static final String INSTRUMENT_FSK2_DECODER_TO_MESSAGE_FRAMER =
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"Tap Point: FSK2 Decoder > < Message Framer";
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private FSK2Decoder mFSKDecoder;
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private Broadcaster<Boolean> mFSKDecoderBroadcaster =
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new Broadcaster<Boolean>();
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private HalfBandFilter_RB_RB mDecimationFilter;
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private RealFIRFilter_RB_RB mBandPassFilter;
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private MessageFramer mTowerMessageFramer;
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private MessageFramer mTransponderMessageFramer;
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private LJ1200MessageProcessor mMessageProcessor;
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public LJ1200Decoder( AliasList aliasList )
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{
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super( new LJ1200DecoderState( aliasList ) );
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mDecimationFilter = new HalfBandFilter_RB_RB(
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Filters.FIR_HALF_BAND_31T_ONE_EIGHTH_FCO.getCoefficients(), 1.0f, true );
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mBandPassFilter = new RealFIRFilter_RB_RB(
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Filters.FIRBP_1200FSK_24000FS.getCoefficients(), 1.02f );
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mDecimationFilter.setListener( mBandPassFilter );
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mFSKDecoder = new FSK2Decoder( DECIMATED_SAMPLE_RATE,
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SYMBOL_RATE, Output.INVERTED );
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mBandPassFilter.setListener( mFSKDecoder );
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mFSKDecoder.setListener( mFSKDecoderBroadcaster );
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mTowerMessageFramer = new MessageFramer(
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SyncPattern.LJ1200.getPattern(), MESSAGE_LENGTH );
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mTransponderMessageFramer = new MessageFramer(
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SyncPattern.LJ1200_TRANSPONDER.getPattern(), MESSAGE_LENGTH );
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mFSKDecoderBroadcaster.addListener( mTowerMessageFramer );
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mFSKDecoderBroadcaster.addListener( mTransponderMessageFramer );
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mMessageProcessor = new LJ1200MessageProcessor( aliasList );
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mTowerMessageFramer.addMessageListener( mMessageProcessor );
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mTransponderMessageFramer.addMessageListener( mMessageProcessor );
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mMessageProcessor.setMessageListener( mMessageBroadcaster );
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}
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@Override
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public DecoderType getDecoderType()
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{
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return DecoderType.LJ_1200;
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}
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public void dispose()
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{
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super.dispose();
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mDecimationFilter.dispose();
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mBandPassFilter.dispose();
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mFSKDecoder.dispose();
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mTowerMessageFramer.dispose();
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mMessageProcessor.dispose();
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}
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/**
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* Returns a float listener interface for connecting this decoder to a
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* float stream provider
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*/
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public RealSampleListener getRealReceiver()
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{
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return (RealSampleListener)mDecimationFilter;
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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 FloatTap(
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INSTRUMENT_BANDPASS_FILTER_TO_FSK2_DEMOD, 0, 0.5f ) );
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mAvailableTaps.addAll( mFSKDecoder.getTaps() );
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mAvailableTaps.add( new BinaryTap(
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INSTRUMENT_FSK2_DECODER_TO_MESSAGE_FRAMER, 0, 0.025f ) );
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}
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return mAvailableTaps;
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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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mFSKDecoder.addTap( tap );
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switch( tap.getName() )
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{
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case INSTRUMENT_BANDPASS_FILTER_TO_FSK2_DEMOD:
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FloatBufferTap bpTap = (FloatBufferTap)tap;
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mBandPassFilter.setListener( bpTap );
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bpTap.setListener( mFSKDecoder );
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break;
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case INSTRUMENT_FSK2_DECODER_TO_MESSAGE_FRAMER:
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BinaryTap decoderTap = (BinaryTap)tap;
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mFSKDecoder.setListener( decoderTap );
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decoderTap.setListener( mTowerMessageFramer );
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break;
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}
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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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mFSKDecoder.removeTap( tap );
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switch( tap.getName() )
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{
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case INSTRUMENT_BANDPASS_FILTER_TO_FSK2_DEMOD:
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mBandPassFilter.setListener( mFSKDecoder );
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break;
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case INSTRUMENT_FSK2_DECODER_TO_MESSAGE_FRAMER:
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mFSKDecoder.setListener( mTowerMessageFramer );
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break;
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}
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}
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@Override
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public Listener<RealBuffer> getRealBufferListener()
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{
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return mDecimationFilter;
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}
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}
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