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/mpt1327/MPT1327Decoder.java
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295
src/module/decode/mpt1327/MPT1327Decoder.java
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/*******************************************************************************
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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 module.decode.mpt1327;
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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 alias.AliasList;
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import bits.MessageFramer;
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import bits.SyncPattern;
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import controller.channel.Channel.ChannelType;
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import controller.channel.map.ChannelMap;
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import dsp.filter.FilterFactory;
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import dsp.filter.Filters;
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import dsp.filter.Window.WindowType;
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import dsp.filter.dc.DCRemovalFilterLyons;
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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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* MPT1327 Decoder - 1200 baud 2FSK decoder that can process 48k sample rate
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* complex or floating point samples and output fully framed MPT1327 control and
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* traffic messages.
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*/
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public class MPT1327Decoder extends Decoder
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implements IRealBufferListener, 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 sDECIMATED_SAMPLE_RATE = 24000;
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/* Baud or Symbol Rate */
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private static final int sSYMBOL_RATE = 1200;
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/* Message length -- longest possible message is:
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* 4xREVS + 16xSYNC + 64xADD1 + 64xDCW1 + 64xDCW2 + 64xDCW3 + 64xDCW4 */
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private static final int sMESSAGE_LENGTH = 350;
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/* Instrumentation Taps */
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private static final String INSTRUMENT_HB1_FILTER_TO_LOW_PASS =
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"Tap Point: Half-band Decimation Filter > < Low Pass Filter";
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private static final String INSTRUMENT_LOW_PASS_TO_DECODER =
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"Tap Point: Low Pass Filter > < Decoder";
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private static final String INSTRUMENT_DECODER_TO_FRAMER =
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"Tap Point: Decoder > < Sync Detect/Message Framer";
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private List<Tap> mAvailableTaps;
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private HalfBandFilter_RB_RB mDecimationFilter;
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private RealFIRFilter_RB_RB mLowPassFilter;
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private DCRemovalFilterLyons mDCRemovalFilter;
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private FSK2Decoder mFSKDecoder;
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private Broadcaster<Boolean> mSymbolBroadcaster;
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private MessageFramer mControlMessageFramer;
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private MessageFramer mTrafficMessageFramer;
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private MPT1327MessageProcessor mMessageProcessor;
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public MPT1327Decoder( ChannelMap channelMap,
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ChannelType channelType,
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AliasList aliasList,
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Sync sync )
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{
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super( new MPT1327DecoderState( aliasList, channelMap, channelType ) );
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/* Decimation filter - 48000 / 2 = 24000 output */
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mDecimationFilter = new HalfBandFilter_RB_RB(
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Filters.FIR_HALF_BAND_31T_ONE_EIGHTH_FCO.getCoefficients(), 1.0002f, true );
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/* Low pass filter: 2kHz to pass the 1200 & 1800 Hz FSK */
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mLowPassFilter = new RealFIRFilter_RB_RB(
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FilterFactory.getLowPass( 24000, //sampleRate,
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2000, //passFrequency,
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4000, //stopFrequency,
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60, //attenuation,
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WindowType.HANNING, //windowType,
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true ) //forceOddLength
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, 2.0f ); //Gain
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mDecimationFilter.setListener( mLowPassFilter );
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/**
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* Normal: 2FSK Decoder with inverted output
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* French: 2FSK Decoder with normal output
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*/
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if( sync == Sync.NORMAL )
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{
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mFSKDecoder = new FSK2Decoder( 24000, 1200, Output.INVERTED );
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}
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else if( sync == Sync.FRENCH )
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{
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mFSKDecoder = new FSK2Decoder( 24000, 1200, Output.NORMAL );
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}
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else
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{
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throw new IllegalArgumentException( "MPT1327 Decoder - unrecognized Sync type" );
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}
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mLowPassFilter.setListener( mFSKDecoder );
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mSymbolBroadcaster = new Broadcaster<Boolean>();
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mFSKDecoder.setListener( mSymbolBroadcaster );
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/* Message framer for control channel messages */
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mControlMessageFramer =
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new MessageFramer( sync.getControlSyncPattern().getPattern(),
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sMESSAGE_LENGTH );
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mSymbolBroadcaster.addListener( mControlMessageFramer );
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/* Message framer for traffic channel massages */
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mTrafficMessageFramer =
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new MessageFramer( sync.getTrafficSyncPattern().getPattern(),
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sMESSAGE_LENGTH );
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mSymbolBroadcaster.addListener( mTrafficMessageFramer );
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/* Fully decoded and framed messages processor */
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mMessageProcessor = new MPT1327MessageProcessor( aliasList );
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mMessageProcessor.setMessageListener( mMessageBroadcaster );
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mControlMessageFramer.addMessageListener( mMessageProcessor );
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mTrafficMessageFramer.addMessageListener( mMessageProcessor );
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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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@Override
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public DecoderType getDecoderType()
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{
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return DecoderType.MPT1327;
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}
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/**
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* Cleanup method
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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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mSymbolBroadcaster.dispose();
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mControlMessageFramer.dispose();
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if( mDCRemovalFilter != null )
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{
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mDCRemovalFilter.dispose();
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}
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mFSKDecoder.dispose();
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mDecimationFilter.dispose();
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mLowPassFilter.dispose();
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mMessageProcessor.dispose();
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mTrafficMessageFramer.dispose();
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}
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/* Instrumentation Taps */
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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(
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new FloatTap( INSTRUMENT_HB1_FILTER_TO_LOW_PASS, 0, 0.5f ) );
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mAvailableTaps.add(
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new FloatTap( INSTRUMENT_LOW_PASS_TO_DECODER, 0, 0.5f ) );
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mAvailableTaps.add(
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new BinaryTap( INSTRUMENT_DECODER_TO_FRAMER, 0, 0.025f ) );
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/* Add the taps from the FSK decoder */
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mAvailableTaps.addAll( mFSKDecoder.getTaps() );
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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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/* Send request to decoder */
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mFSKDecoder.addTap( tap );
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switch( tap.getName() )
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{
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case INSTRUMENT_HB1_FILTER_TO_LOW_PASS:
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FloatBufferTap hb1Tap = (FloatBufferTap)tap;
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mDecimationFilter.setListener( hb1Tap );
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hb1Tap.setListener( mLowPassFilter );
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break;
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case INSTRUMENT_LOW_PASS_TO_DECODER:
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FloatBufferTap lowTap = (FloatBufferTap)tap;
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mLowPassFilter.setListener( lowTap );
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lowTap.setListener( mFSKDecoder );
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break;
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case INSTRUMENT_DECODER_TO_FRAMER:
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BinaryTap decoderTap = (BinaryTap)tap;
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mFSKDecoder.setListener( decoderTap );
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decoderTap.setListener( mSymbolBroadcaster );
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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_HB1_FILTER_TO_LOW_PASS:
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mDecimationFilter.setListener( mLowPassFilter );
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break;
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case INSTRUMENT_LOW_PASS_TO_DECODER:
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mLowPassFilter.setListener( mFSKDecoder );
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break;
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case INSTRUMENT_DECODER_TO_FRAMER:
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mFSKDecoder.setListener( mSymbolBroadcaster );
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break;
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}
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}
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public enum Sync
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{
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NORMAL( "Normal",
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SyncPattern.MPT1327_CONTROL,
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SyncPattern.MPT1327_TRAFFIC ),
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FRENCH( "French",
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SyncPattern.MPT1327_CONTROL_FRENCH,
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SyncPattern.MPT1327_TRAFFIC_FRENCH );
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private String mLabel;
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private SyncPattern mControlSyncPattern;
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private SyncPattern mTrafficSyncPattern;
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private Sync( String label,
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SyncPattern controlPattern,
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SyncPattern trafficPattern )
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{
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mLabel = label;
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mControlSyncPattern = controlPattern;
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mTrafficSyncPattern = trafficPattern;
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}
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public String getLabel()
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{
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return mLabel;
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}
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public SyncPattern getControlSyncPattern()
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{
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return mControlSyncPattern;
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}
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public SyncPattern getTrafficSyncPattern()
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{
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return mTrafficSyncPattern;
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}
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public String toString()
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{
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return getLabel();
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}
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}
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}
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