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[WIP] Updates the LTR-Standard and LTR-Net decoders to use a new LTR

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decoder with a zero-crossing symbol timing error detector.  The new
decoder is optimized for 8 kHz FM demodulated audio produced by the
AudioModule.
This commit is contained in:
Denny
2018-06-02 08:47:48 -04:00
parent c13315f731
commit a898be265f
64 changed files with 2660 additions and 1285 deletions
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143
src/main/java/io/github/dsheirer/audio/AudioModule.java
View File

@@ -1,19 +1,16 @@
/*******************************************************************************
* sdrtrunk
* Copyright (C) 2014-2017 Dennis Sheirer
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.audio;
@@ -23,90 +20,76 @@ import io.github.dsheirer.audio.squelch.SquelchState;
import io.github.dsheirer.channel.metadata.Metadata;
import io.github.dsheirer.dsp.filter.design.FilterDesignException;
import io.github.dsheirer.dsp.filter.fir.FIRFilterSpecification;
import io.github.dsheirer.dsp.filter.fir.real.RealFIRFilter2;
import io.github.dsheirer.dsp.filter.fir.remez.RemezFIRFilterDesigner;
import io.github.dsheirer.dsp.filter.polyphase.PolyphaseFIRDecimatingFilter_RB;
import io.github.dsheirer.module.Module;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.real.IFilteredRealBufferListener;
import io.github.dsheirer.sample.real.RealBuffer;
import io.github.dsheirer.sample.buffer.IReusableBufferListener;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Provides packaging of demodulated audio sample buffers into audio packets for
* broadcast to registered audio packet listeners. Includes audio packet
* metadata in constructed audio packets.
* Provides packaging of demodulated audio sample buffers into audio packets for broadcast to registered audio packet
* listeners. Includes audio packet metadata in constructed audio packets.
*
* Incorporates audio squelch state listener to control if audio packets are
* broadcast or ignored.
* Incorporates audio squelch state listener to control if audio packets are broadcast or ignored.
*
* This class is designed to support 8 kHz sample rate demodulated audio.
*/
public class AudioModule extends Module implements IAudioPacketProvider, IFilteredRealBufferListener,
ISquelchStateListener, Listener<RealBuffer>
public class AudioModule extends Module implements IAudioPacketProvider, IReusableBufferListener,
ISquelchStateListener, Listener<ReusableBuffer>
{
protected static final Logger mLog = LoggerFactory.getLogger(AudioModule.class);
private static float[] mDecimationCoefficients;
private static float[] sHighPassFilterCoefficients;
static
{
//Band-pass filter to both decimate (48kHz to 8kHz) and block 0 - 300 Hz (LTR signalling).
FIRFilterSpecification specification = FIRFilterSpecification.bandPassBuilder()
.sampleRate(48000)
.stopFrequency1(150)
.passFrequencyBegin(300)
.passFrequencyEnd(3500)
.stopFrequency2(4000)
.stopRipple(0.0004)
.passRipple(0.008)
FIRFilterSpecification specification = FIRFilterSpecification.highPassBuilder()
.sampleRate(8000)
.stopBandCutoff(200)
.stopBandAmplitude(0.0)
.stopBandRipple(0.025)
.passBandStart(300)
.passBandAmplitude(1.0)
.passBandRipple(0.01)
.build();
RemezFIRFilterDesigner designer = new RemezFIRFilterDesigner(specification);
try
{
if(!designer.isValid())
{
throw new FilterDesignException("Couldn't design the audio decimation filter");
}
RemezFIRFilterDesigner designer = new RemezFIRFilterDesigner(specification);
mDecimationCoefficients = designer.getImpulseResponse();
if(designer.isValid())
{
sHighPassFilterCoefficients = designer.getImpulseResponse();
}
}
catch(FilterDesignException e)
catch(FilterDesignException fde)
{
mLog.debug("Error designing filter", e);
mLog.error("Filter design error", fde);
}
}
private RealFIRFilter2 mHighPassFilter = new RealFIRFilter2(sHighPassFilterCoefficients);
private SquelchStateListener mSquelchStateListener = new SquelchStateListener();
private SquelchState mSquelchState = SquelchState.SQUELCH;
private Listener<AudioPacket> mAudioPacketListener;
private PolyphaseFIRDecimatingFilter_RB mAudioDecimationFilter;
private Metadata mMetadata;
/**
* Creates an Audio Module.
* @param metadata to use for audio packets produced by this audio module.
*/
public AudioModule(Metadata metadata)
{
mMetadata = metadata;
mAudioDecimationFilter = new PolyphaseFIRDecimatingFilter_RB(mDecimationCoefficients, 6, 2.0f);
mAudioDecimationFilter.setListener(new Listener<RealBuffer>()
{
@Override
public void receive(RealBuffer realBuffer)
{
if(mAudioPacketListener != null)
{
AudioPacket packet = new AudioPacket(realBuffer.getSamples(), mMetadata.copyOf());
mAudioPacketListener.receive(packet);
}
}
});
}
@Override
public void dispose()
{
mSquelchStateListener = null;
mAudioPacketListener = null;
mSquelchStateListener = null;
}
@Override
@@ -123,32 +106,13 @@ public class AudioModule extends Module implements IAudioPacketProvider, IFilter
@Override
public void stop()
{
/* Issue an end audio packet in case a recorder is still rolling */
/* Issue an end-audio packet in case a recorder is still rolling */
if(mAudioPacketListener != null)
{
mAudioPacketListener.receive(new AudioPacket(AudioPacket.Type.END, mMetadata.copyOf()));
}
}
/**
* Processes demodulated audio samples into audio packets with current audio
* metadata and sends to the registered listener
*/
@Override
public void receive(RealBuffer buffer)
{
if(mAudioPacketListener != null && mSquelchState == SquelchState.UNSQUELCH)
{
mAudioDecimationFilter.receive(buffer);
}
}
@Override
public Listener<RealBuffer> getFilteredRealBufferListener()
{
return this;
}
@Override
public void setAudioPacketListener(Listener<AudioPacket> listener)
{
@@ -167,6 +131,29 @@ public class AudioModule extends Module implements IAudioPacketProvider, IFilter
return mSquelchStateListener;
}
@Override
public void receive(ReusableBuffer reusableBuffer)
{
if(mAudioPacketListener != null && mSquelchState == SquelchState.UNSQUELCH)
{
ReusableBuffer highPassFiltered = mHighPassFilter.filter(reusableBuffer);
AudioPacket packet = new AudioPacket(highPassFiltered.getSamplesCopy(), mMetadata.copyOf());
mAudioPacketListener.receive(packet);
highPassFiltered.decrementUserCount();
}
else
{
reusableBuffer.decrementUserCount();
}
}
@Override
public Listener getReusableBufferListener()
{
//Redirect received reusable buffers to the receive(buffer) method
return this;
}
/**
* Wrapper for squelch state listener
*/

179
src/main/java/io/github/dsheirer/audio/AudioModule2.java
View File

@@ -1,179 +0,0 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.audio;
import io.github.dsheirer.audio.squelch.ISquelchStateListener;
import io.github.dsheirer.audio.squelch.SquelchState;
import io.github.dsheirer.channel.metadata.Metadata;
import io.github.dsheirer.dsp.filter.resample.RealResampler;
import io.github.dsheirer.module.Module;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.real.IFilteredRealBufferListener;
import io.github.dsheirer.sample.real.RealBuffer;
import io.github.dsheirer.source.ISourceEventListener;
import io.github.dsheirer.source.SourceEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Provides packaging of demodulated audio sample buffers into audio packets for
* broadcast to registered audio packet listeners. Includes audio packet
* metadata in constructed audio packets.
*
* Incorporates audio squelch state listener to control if audio packets are
* broadcast or ignored.
*/
public class AudioModule2 extends Module implements IAudioPacketProvider, IFilteredRealBufferListener,
ISquelchStateListener, ISourceEventListener, Listener<RealBuffer>
{
protected static final Logger mLog = LoggerFactory.getLogger(AudioModule2.class);
private static final double OUTPUT_SAMPLE_RATE = 8000.0;
private SquelchStateListener mSquelchStateListener = new SquelchStateListener();
private SquelchState mSquelchState = SquelchState.SQUELCH;
private Listener<AudioPacket> mAudioPacketListener;
private Listener<ReusableBuffer> mResampledBufferListener;
private RealResampler mAudioResampler;
private Metadata mMetadata;
public AudioModule2(Metadata metadata)
{
mMetadata = metadata;
mResampledBufferListener = new Listener<ReusableBuffer>()
{
@Override
public void receive(ReusableBuffer reusableBuffer)
{
if(mAudioPacketListener != null)
{
AudioPacket packet = new AudioPacket(reusableBuffer.getSamplesCopy(), mMetadata.copyOf());
reusableBuffer.decrementUserCount();
mAudioPacketListener.receive(packet);
}
}
};
setSampleRate(25000.0);
}
/**
* Sets the incoming sample rate
*/
private void setSampleRate(double sampleRate)
{
mAudioResampler = new RealResampler(sampleRate, OUTPUT_SAMPLE_RATE);
mAudioResampler.setListener(mResampledBufferListener);
}
@Override
public void dispose()
{
mSquelchStateListener = null;
mAudioPacketListener = null;
}
@Override
public void reset()
{
}
@Override
public void start()
{
/* No start operations provided */
}
@Override
public void stop()
{
/* Issue an end audio packet in case a recorder is still rolling */
if(mAudioPacketListener != null)
{
mAudioPacketListener.receive(new AudioPacket(AudioPacket.Type.END, mMetadata.copyOf()));
}
}
/**
* Processes demodulated audio samples into audio packets with current audio
* metadata and sends to the registered listener
*/
@Override
public void receive(RealBuffer buffer)
{
if(mAudioResampler != null && mSquelchState == SquelchState.UNSQUELCH)
{
mAudioResampler.receive(buffer);
}
}
@Override
public Listener<RealBuffer> getFilteredRealBufferListener()
{
return this;
}
@Override
public void setAudioPacketListener(Listener<AudioPacket> listener)
{
mAudioPacketListener = listener;
}
@Override
public void removeAudioPacketListener()
{
mAudioPacketListener = null;
}
@Override
public Listener<SourceEvent> getSourceEventListener()
{
return new Listener<SourceEvent>()
{
@Override
public void receive(SourceEvent sourceEvent)
{
if(sourceEvent.getEvent() == SourceEvent.Event.NOTIFICATION_SAMPLE_RATE_CHANGE)
{
setSampleRate(sourceEvent.getValue().doubleValue());
}
}
};
}
@Override
public Listener<SquelchState> getSquelchStateListener()
{
return mSquelchStateListener;
}
/**
* Wrapper for squelch state listener
*/
public class SquelchStateListener implements Listener<SquelchState>
{
@Override
public void receive(SquelchState state)
{
if(state == SquelchState.SQUELCH && mAudioPacketListener != null)
{
mAudioPacketListener.receive(new AudioPacket(AudioPacket.Type.END, mMetadata.copyOf()));
}
mSquelchState = state;
}
}
}

6
src/main/java/io/github/dsheirer/bits/ISyncDetectListener.java
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@@ -1,6 +0,0 @@
package io.github.dsheirer.bits;
public interface ISyncDetectListener
{
public void syncDetected();
}

189
src/main/java/io/github/dsheirer/bits/MessageFramer.java
View File

@@ -1,119 +1,110 @@
/*******************************************************************************
* SDR Trunk
* Copyright (C) 2014 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.bits;
import io.github.dsheirer.dsp.symbol.SyncDetectListener;
import io.github.dsheirer.dsp.symbol.ISyncDetectListener;
import io.github.dsheirer.dsp.symbol.SyncDetectProvider;
import io.github.dsheirer.sample.Broadcaster;
import io.github.dsheirer.sample.Listener;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
* MessageFramer - processes bitsets looking for a sync pattern within
* the bits, and then extracts the message, including the sync
* pattern, for a total bit length of messageLength.
*
*
* Will extract multiple messages simultaneously, for each sync pattern that is
* encountered within the bitset bit stream.
*/
public class MessageFramer implements Listener<Boolean>,
SyncDetectProvider
public class MessageFramer implements Listener<Boolean>, SyncDetectProvider
{
private boolean[] mSyncPattern;
private int mMessageLength;
private SyncDetectListener mSyncDetectListener;
private Broadcaster<BinaryMessage> mBroadcaster =
new Broadcaster<BinaryMessage>();
private ArrayList<MessageAssembler> mMessageAssemblers =
new ArrayList<MessageAssembler>();
private boolean[] mSyncPattern;
private int mMessageLength;
private ISyncDetectListener mSyncDetectListener;
private Broadcaster<BinaryMessage> mBroadcaster = new Broadcaster<BinaryMessage>();
private List<MessageAssembler> mMessageAssemblers = new ArrayList<MessageAssembler>();
private List<MessageAssembler> mCompletedMessageAssemblers = new ArrayList<MessageAssembler>();
private SyncPatternMatcher mMatcher;
private ArrayList<MessageAssembler> mCompletedMessageAssemblers =
new ArrayList<MessageAssembler>();
private BinaryMessage mPreviousBuffer = null;
private SyncPatternMatcher mMatcher;
public MessageFramer( boolean[] syncPattern, int messageLength )
public MessageFramer(boolean[] syncPattern, int messageLength)
{
mSyncPattern = syncPattern;
mMatcher = new SyncPatternMatcher( syncPattern );
mMatcher = new SyncPatternMatcher(syncPattern);
mMessageLength = messageLength;
}
public void reset()
{
for( MessageAssembler assembler: mMessageAssemblers )
{
assembler.dispose();
}
for(MessageAssembler assembler : mMessageAssemblers)
{
assembler.dispose();
}
mMessageAssemblers.clear();
}
}
public void dispose()
{
mBroadcaster.dispose();
mCompletedMessageAssemblers.clear();
mMessageAssemblers.clear();
mBroadcaster.dispose();
mCompletedMessageAssemblers.clear();
mMessageAssemblers.clear();
}
@Override
public void receive( Boolean bit )
public void receive(Boolean bit)
{
mMatcher.receive( bit );
mMatcher.receive(bit);
Iterator<MessageAssembler> it = mMessageAssemblers.iterator();
MessageAssembler assembler;
while( it.hasNext() )
while(it.hasNext())
{
assembler = it.next();
/* Dispose and remove any completed assemblers */
if( assembler.complete() )
if(assembler.complete())
{
assembler.dispose();
it.remove();
assembler.dispose();
it.remove();
}
/* Otherwise, send them the bit */
else
{
assembler.receive( bit );
assembler.receive(bit);
}
}
/* Check for sync match and add new message assembler */
if( mMatcher.matches() )
{
addMessageAssembler( new MessageAssembler( mMessageLength, mSyncPattern ) );
if(mMatcher.matches())
{
addMessageAssembler(new MessageAssembler(mMessageLength, mSyncPattern));
/* Notify any sync detect listener(s) */
if( mSyncDetectListener != null )
if(mSyncDetectListener != null)
{
mSyncDetectListener.syncDetected();
mSyncDetectListener.syncDetected();
}
}
}
}
/**
* Causes all messages currently under assembly to be forcibly
* sent (ie flushed) to all registered message listeners, and
@@ -121,44 +112,44 @@ public class MessageFramer implements Listener<Boolean>,
*/
public void flush()
{
for( MessageAssembler assembler: mMessageAssemblers )
for(MessageAssembler assembler : mMessageAssemblers)
{
assembler.flush();
}
}
@Override
public void setSyncDetectListener( SyncDetectListener listener )
@Override
public void setSyncDetectListener(ISyncDetectListener listener)
{
mSyncDetectListener = listener;
mSyncDetectListener = listener;
}
/**
* Allow a message listener to register with this framer to receive
* all framed messages
*/
public void addMessageListener( Listener<BinaryMessage> listener )
public void addMessageListener(Listener<BinaryMessage> listener)
{
mBroadcaster.addListener( listener );
mBroadcaster.addListener(listener);
}
public void removeMessageListener( Listener<BinaryMessage> listener )
public void removeMessageListener(Listener<BinaryMessage> listener)
{
mBroadcaster.removeListener( listener );
mBroadcaster.removeListener(listener);
}
/*
* Adds a message assembler to receive bits from the bit stream
*/
private void addMessageAssembler( MessageAssembler assembler )
private void addMessageAssembler(MessageAssembler assembler)
{
mMessageAssemblers.add( assembler );
mMessageAssemblers.add(assembler);
}
@SuppressWarnings( "unused" )
private void removeMessageAssembler( MessageAssembler assembler )
@SuppressWarnings("unused")
private void removeMessageAssembler(MessageAssembler assembler)
{
mMessageAssemblers.remove( assembler );
mMessageAssemblers.remove(assembler);
}
/**
@@ -166,7 +157,7 @@ public class MessageFramer implements Listener<Boolean>,
* identified sync pattern, and every bit thereafter. Once the accumulated
* bits equal the message length, the message is sent and the assembler
* flags itself as complete.
*
*
* By design, multiple message assemblers can exist at the same time, each
* assembling different, overlapping potential messages
*/
@@ -174,46 +165,46 @@ public class MessageFramer implements Listener<Boolean>,
{
BinaryMessage mMessage;
boolean mComplete = false;
MessageAssembler( int messageLength )
MessageAssembler(int messageLength)
{
mMessage = new BinaryMessage( messageLength );
mMessage = new BinaryMessage(messageLength);
}
MessageAssembler( int messageLength, boolean[] initialFill )
MessageAssembler(int messageLength, boolean[] initialFill)
{
this( messageLength );
this(messageLength);
/* Pre-load the message with the sync pattern */
for( int x = 0; x < initialFill.length; x++ )
for(int x = 0; x < initialFill.length; x++)
{
receive( initialFill[ x ] );
receive(initialFill[x]);
}
}
public void dispose()
{
mMessage = null;
mMessage = null;
}
@Override
/**
* Receives one bit at a time, and assembles them into a message
*/
public void receive( Boolean bit )
public void receive(Boolean bit)
{
try
{
mMessage.add( bit );
mMessage.add(bit);
}
catch( BitSetFullException e )
catch(BitSetFullException e)
{
e.printStackTrace();
}
/* Once our message is complete (ie full), send it to all registered
* message listeners, and set complete flag so for auto-removal */
if( mMessage.isFull() )
if(mMessage.isFull())
{
mComplete = true;
flush();
@@ -226,7 +217,7 @@ public class MessageFramer implements Listener<Boolean>,
*/
public void flush()
{
mBroadcaster.receive( mMessage );
mBroadcaster.receive(mMessage);
mComplete = true;
}

2
src/main/java/io/github/dsheirer/bits/SoftSyncDetector.java
View File

@@ -1,5 +1,7 @@
package io.github.dsheirer.bits;
import io.github.dsheirer.dsp.symbol.ISyncDetectListener;
public class SoftSyncDetector implements ISyncProcessor
{
private ISyncDetectListener mListener;

2
src/main/java/io/github/dsheirer/bits/SyncDetector.java
View File

@@ -1,5 +1,7 @@
package io.github.dsheirer.bits;
import io.github.dsheirer.dsp.symbol.ISyncDetectListener;
public class SyncDetector implements ISyncProcessor
{
private long mPattern;

55
src/main/java/io/github/dsheirer/dsp/filter/ComplexFilter.java
View File

@@ -1,55 +0,0 @@
/*******************************************************************************
* SDR Trunk
* Copyright (C) 2014 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
******************************************************************************/
package io.github.dsheirer.dsp.filter;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.complex.Complex;
@Deprecated
public abstract class ComplexFilter implements Listener<Complex>
{
private Listener<Complex> mListener;
public void setListener( Listener<Complex> listener )
{
mListener = listener;
}
public void dispose()
{
mListener = null;
}
public Listener<Complex> getListener()
{
return mListener;
}
public boolean hasListener()
{
return mListener != null;
}
protected void send( Complex sample )
{
if( mListener != null )
{
mListener.receive( sample );
}
}
}

12
src/main/java/io/github/dsheirer/dsp/filter/channelizer/PolyphaseChannelManager.java
View File

@@ -22,7 +22,7 @@ import io.github.dsheirer.dsp.filter.channelizer.output.TwoChannelOutputProcesso
import io.github.dsheirer.dsp.filter.design.FilterDesignException;
import io.github.dsheirer.sample.Broadcaster;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.buffer.IReusableBufferProvider;
import io.github.dsheirer.sample.buffer.IReusableComplexBufferProvider;
import io.github.dsheirer.sample.buffer.ReusableComplexBuffer;
import io.github.dsheirer.source.ISourceEventProcessor;
import io.github.dsheirer.source.Source;
@@ -69,7 +69,7 @@ public class PolyphaseChannelManager implements ISourceEventProcessor
private static final int POLYPHASE_SYNTHESIZER_TAPS_PER_CHANNEL = 9;
private Broadcaster<SourceEvent> mSourceEventBroadcaster = new Broadcaster<>();
private IReusableBufferProvider<ReusableComplexBuffer> mReusableBufferProvider;
private IReusableComplexBufferProvider mReusableBufferProvider;
private List<PolyphaseChannelSource> mChannelSources = new CopyOnWriteArrayList<>();
private ChannelCalculator mChannelCalculator;
private ComplexPolyphaseChannelizerM2 mPolyphaseChannelizer;
@@ -81,20 +81,20 @@ public class PolyphaseChannelManager implements ISourceEventProcessor
/**
* Creates a polyphase channel manager instance.
*
* @param reusableBufferProvider (ie tuner) that supports register/deregister for reusable baseband sample buffer
* @param reusableComplexBufferProvider (ie tuner) that supports register/deregister for reusable baseband sample buffer
* streams
* @param frequency of the baseband complex buffer sample stream (ie center frequency)
* @param sampleRate of the baseband complex buffer sample stream
*/
public PolyphaseChannelManager(IReusableBufferProvider<ReusableComplexBuffer> reusableBufferProvider,
public PolyphaseChannelManager(IReusableComplexBufferProvider reusableComplexBufferProvider,
long frequency, double sampleRate)
{
if(reusableBufferProvider == null)
if(reusableComplexBufferProvider == null)
{
throw new IllegalArgumentException("Complex buffer provider argument cannot be null");
}
mReusableBufferProvider = reusableBufferProvider;
mReusableBufferProvider = reusableComplexBufferProvider;
int channelCount = (int)(sampleRate / MINIMUM_CHANNEL_BANDWIDTH);

47
src/main/java/io/github/dsheirer/dsp/filter/dc/BufferDCFilter.java
View File

@@ -15,26 +15,23 @@
******************************************************************************/
package io.github.dsheirer.dsp.filter.dc;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.buffer.ReusableBufferQueue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class BufferDCFilter
{
private final static Logger mLog = LoggerFactory.getLogger(BufferDCFilter.class);
private ReusableBufferQueue mReusableBufferQueue = new ReusableBufferQueue("Buffer DC Filter");
private double mAccumulator;
/**
* Calculates the DC offset present in the samples and subtracts the offset from all samples.
*/
public static void filterReal(float[] samples)
public void filterReal(float[] samples)
{
double accumulator = 0.0;
for(int x = 0; x < samples.length; x++)
{
accumulator += samples[x];
}
float adjustment = (float)(accumulator / (double)samples.length);
float adjustment = getOffset(samples);
for(int x = 0; x < samples.length; x++)
{
@@ -42,6 +39,18 @@ public class BufferDCFilter
}
}
private float getOffset(float[] samples)
{
mAccumulator = 0.0;
for(int x = 0; x < samples.length; x++)
{
mAccumulator += samples[x];
}
return (float)(mAccumulator / (double)samples.length);
}
/**
* Calculates the DC offset present in the samples and subtracts the offset from all samples.
*/
@@ -67,4 +76,24 @@ public class BufferDCFilter
samples[x + 1] = samples[x + 1] - qAdjustment;
}
}
public ReusableBuffer filter(ReusableBuffer unfilteredBuffer)
{
float[] unfilteredSamples = unfilteredBuffer.getSamples();
ReusableBuffer filteredBuffer = mReusableBufferQueue.getBuffer(unfilteredSamples.length);
float[] filteredSamples = filteredBuffer.getSamples();
float offset = getOffset(unfilteredSamples);
for(int x = 0; x < unfilteredSamples.length; x++)
{
filteredSamples[x] = unfilteredSamples[x] - offset;
}
unfilteredBuffer.decrementUserCount();
filteredBuffer.incrementUserCount();
return filteredBuffer;
}
}

108
src/main/java/io/github/dsheirer/dsp/filter/dc/DCRemovalFilter.java
View File

@@ -1,41 +1,87 @@
/*******************************************************************************
* SDR Trunk
* Copyright (C) 2014,2015 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.dsp.filter.dc;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.buffer.ReusableBufferQueue;
/**
* DC removal filter for removing any DC offset that may be present when a signal is not aligned within the
* demodulated channel.
*/
public class DCRemovalFilter
{
protected float mAverage;
protected float mRatio;
private ReusableBufferQueue mReusableBufferQueue = new ReusableBufferQueue("DC Removal Filter");
protected float mAverage;
protected float mRatio;
public DCRemovalFilter( float ratio )
{
mRatio = ratio;
}
/**
* Creates a DC removal filter.
*
* @param ratio
*/
public DCRemovalFilter(float ratio)
{
mRatio = ratio;
}
public void reset()
{
mAverage = 0.0f;
}
/**
* Resets the running average to zero.
*/
public void reset()
{
mAverage = 0.0f;
}
public float filter( float sample )
{
float filtered = sample - mAverage;
mAverage += mRatio * filtered;
return filtered;
}
/**
* Filters the sample and returns a filtered (ie DC-removed) sample.
* @param sample to filter
* @return filtered sample
*/
public float filter(float sample)
{
float filtered = sample - mAverage;
mAverage += mRatio * filtered;
return filtered;
}
/**
* Filters the buffer samples and returns a new reusable buffer with the filtered samples.
*
* Note: this method automatically manages the user accounting between the buffer argument and the new returned
* filtered sample buffer.
*
* @param unfilteredBuffer containing samples to filter
* @return a new reusable buffer containing the filtered samples with the user count set to 1.
*/
public ReusableBuffer filter(ReusableBuffer unfilteredBuffer)
{
ReusableBuffer filteredBuffer = mReusableBufferQueue.getBuffer(unfilteredBuffer.getSampleCount());
float[] unfilteredSamples = unfilteredBuffer.getSamples();
float[] filteredSamples = filteredBuffer.getSamples();
for(int x = 0; x < unfilteredSamples.length; x++)
{
filteredSamples[x] = filter(unfilteredSamples[x]);
}
unfilteredBuffer.decrementUserCount();
filteredBuffer.incrementUserCount();
return filteredBuffer;
}
}

129
src/main/java/io/github/dsheirer/dsp/filter/dc/IIRSinglePoleDCRemovalFilter.java
View File

@@ -1,45 +1,106 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.dsp.filter.dc;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.buffer.ReusableBufferQueue;
import io.github.dsheirer.sample.real.RealSampleListener;
public class IIRSinglePoleDCRemovalFilter implements RealSampleListener
{
private float mAlpha;
private float mPreviousInput = 0.0f;
private float mPreviousOutput = 0.0f;
private ReusableBufferQueue mReusableBufferQueue = new ReusableBufferQueue("IIR DC Filter");
private float mAlpha;
private float mPreviousInput = 0.0f;
private float mPreviousOutput = 0.0f;
private float mCurrentOutput = 0.0f;
private RealSampleListener mListener;
/**
* IIR single-pole DC removal filter, as described by J M de Freitas in
* 29Jan2007 paper at:
*
* http://www.mathworks.com/matlabcentral/fileexchange/downloads/72134/download
*
* @param alpha 0.0 - 1.0 float - the closer alpha is to unity, the closer
* the cutoff frequency is to DC.
*/
public IIRSinglePoleDCRemovalFilter( float alpha )
{
mAlpha = alpha;
}
@Override
public void receive( float currentInput )
private RealSampleListener mListener;
/**
* IIR single-pole DC removal filter, as described by J M de Freitas in
* 29Jan2007 paper at:
*
* http://www.mathworks.com/matlabcentral/fileexchange/downloads/72134/download
*
* @param alpha 0.0 - 1.0 float - the closer alpha is to unity, the closer
* the cutoff frequency is to DC.
*/
public IIRSinglePoleDCRemovalFilter(float alpha)
{
float currentOutput = ( currentInput - mPreviousInput ) +
( mAlpha * mPreviousOutput );
if( mListener != null )
{
mListener.receive( currentOutput );
}
mPreviousInput = currentInput;
mPreviousOutput = currentOutput;
mAlpha = alpha;
}
public void setListener( RealSampleListener listener )
{
mListener = listener;
}
/**
* Filters the sample
* @param sample to filter
* @return filtered output sample
*/
public float filter(float sample)
{
mCurrentOutput = (sample - mPreviousInput) + (mAlpha * mPreviousOutput);
mPreviousInput = sample;
mPreviousOutput = mCurrentOutput;
return mCurrentOutput;
}
/**
* Filters the input buffer and returns a new filtered output buffer.
*
* Buffer user accounting is handled by this method where the input buffer user count is decremented and the
* returned output buffer has the user count incremented to one.
*
* @param inputBuffer to filter
* @return filtered samples in a new (ie reused) output buffer
*/
public ReusableBuffer filter(ReusableBuffer inputBuffer)
{
ReusableBuffer outputBuffer = mReusableBufferQueue.getBuffer(inputBuffer.getSampleCount());
float[] inputSamples = inputBuffer.getSamples();
float[] outputSamples = outputBuffer.getSamples();
for(int x = 0; x < inputSamples.length; x++)
{
outputSamples[x] = filter(inputSamples[x]);
}
inputBuffer.decrementUserCount();
outputBuffer.incrementUserCount();
return outputBuffer;
}
/**
* Implements the RealSampleListener interface for single sample streams.
*/
@Override
public void receive(float sample)
{
if(mListener != null)
{
mListener.receive(filter(sample));
}
}
/**
* Assigns the listener to receive filtered samples processed by the RealSampleListener interface
*/
public void setListener(RealSampleListener listener)
{
mListener = listener;
}
}

69
src/main/java/io/github/dsheirer/dsp/filter/dc/IIRSinglePoleDCRemovalFilter_RB.java
View File

@@ -1,69 +0,0 @@
package io.github.dsheirer.dsp.filter.dc;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.real.RealBuffer;
public class IIRSinglePoleDCRemovalFilter_RB implements Listener<RealBuffer>
{
private float mAlpha;
private float mPreviousInput = 0.0f;
private float mPreviousOutput = 0.0f;
private Listener<RealBuffer> mListener;
/**
* IIR single-pole DC removal filter, as described by J M de Freitas in
* 29Jan2007 paper at:
*
* http://www.mathworks.com/matlabcentral/fileexchange/downloads/72134/download
*
* @param alpha 0.0 - 1.0 float - the closer alpha is to unity, the closer
* the cutoff frequency is to DC.
*/
public IIRSinglePoleDCRemovalFilter_RB( float alpha )
{
mAlpha = alpha;
}
@Override
public void receive( RealBuffer buffer )
{
if( mListener != null )
{
mListener.receive( filter( buffer ) );
}
}
public RealBuffer filter( RealBuffer buffer )
{
float[] samples = buffer.getSamples();
for( int x = 0; x < samples.length; x++ )
{
samples[ x ] = filter( samples[ x ] );
}
return buffer;
}
public float filter( float sample )
{
float currentOutput = ( sample - mPreviousInput ) +
( mAlpha * mPreviousOutput );
mPreviousInput = sample;
mPreviousOutput = currentOutput;
return currentOutput;
}
public void reset()
{
mPreviousInput = 0.0f;
mPreviousOutput = 0.0f;
}
public void setListener( Listener<RealBuffer> listener )
{
mListener = listener;
}
}

92
src/main/java/io/github/dsheirer/dsp/filter/design/FilterViewer.java
View File

@@ -1,7 +1,7 @@
package io.github.dsheirer.dsp.filter.design;
import io.github.dsheirer.dsp.filter.FilterFactory;
import io.github.dsheirer.dsp.filter.fir.FIRFilterSpecification;
import io.github.dsheirer.dsp.filter.fir.remez.RemezFIRFilterDesigner;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.stage.Stage;
@@ -39,64 +39,68 @@ public class FilterViewer extends Application
*/
private float[] getFilter()
{
FIRFilterSpecification specification = FIRFilterSpecification.lowPassBuilder()
.sampleRate(25000)
.gridDensity(16)
.oddLength(true)
.passBandCutoff(6000)
// FIRFilterSpecification specification = FIRFilterSpecification.lowPassBuilder()
// .sampleRate(8000)
// .gridDensity(16)
// .oddLength(true)
// .passBandCutoff(300)
// .passBandAmplitude(1.0)
// .passBandRipple(0.01)
// .stopBandStart(500)
// .stopBandAmplitude(0.0)
// .stopBandRipple(0.03) //Approximately 60 dB attenuation
// .build();
//
FIRFilterSpecification specification = FIRFilterSpecification.highPassBuilder()
.sampleRate(8000)
.stopBandCutoff(200)
.stopBandAmplitude(0.0)
.stopBandRipple(0.025)
.passBandStart(300)
.passBandAmplitude(1.0)
.passBandRipple(0.01)
.stopBandStart(6500)
.stopBandAmplitude(0.0)
.stopBandRipple(0.005) //Approximately 94 dB attenuation
.build();
// FIRFilterSpecification specification = FIRFilterSpecification.highPassBuilder()
// .sampleRate(24000)
// .stopBandCutoff(800)
// .stopBandAmplitude(0.0)
// .stopBandRipple(0.03)
// .passBandStart(1000)
// .passBandAmplitude(1.0)
// .passBandRipple(0.08)
// FIRFilterSpecification specification = FIRFilterSpecification.bandPassBuilder()
// .sampleRate(8000)
// .stopFrequency1(200)
// .passFrequencyBegin(300)
// .passFrequencyEnd(3800)
// .stopFrequency2(3900)
// .stopRipple(0.01)
// .passRipple(0.01)
// .build();
// FIRFilterSpecification specification = FIRFilterSpecification.bandPassBuilder()
// .sampleRate( 48000 )
// .stopFrequency1( 200 )
// .passFrequencyBegin( 400 )
// .passFrequencyEnd( 3200 )
// .stopFrequency2( 3400 )
// .stopRipple( 0.0003 )
// .passRipple( 0.008)
// .build();
float[] taps = null;
try
{
taps = FilterFactory.getSincM2Synthesizer(12500.0, 2, 19);
// taps = FilterFactory.getSincFilter(25000.0, 12500.0, 2, 19, Window.WindowType.BLACKMAN_HARRIS_7, true);
}
catch(FilterDesignException fde)
{
mLog.error("Error");
}
// try
// {
// RemezFIRFilterDesigner designer = new RemezFIRFilterDesigner(specification);
//
// if(designer.isValid())
// {
// taps = designer.getImpulseResponse();
// }
// taps = FilterFactory.getSincM2Synthesizer(12500.0, 2, 19);
// taps = FilterFactory.getSincFilter(25000.0, 12500.0, 2, 19, Window.WindowType.BLACKMAN_HARRIS_7, true);
// }
// catch(FilterDesignException fde)
// {
// mLog.error("Filter design error", fde);
// mLog.error("Error");
// }
try
{
RemezFIRFilterDesigner designer = new RemezFIRFilterDesigner(specification);
if(designer.isValid())
{
taps = designer.getImpulseResponse();
}
}
catch(FilterDesignException fde)
{
mLog.error("Filter design error", fde);
}
if(taps == null)
{
throw new IllegalStateException("Couldn't design filter");
}
return taps;

2
src/main/java/io/github/dsheirer/dsp/filter/fir/real/RealFIRFilter2.java
View File

@@ -27,7 +27,7 @@ import io.github.dsheirer.sample.buffer.ReusableBufferQueue;
*/
public class RealFIRFilter2 extends FIRFilter
{
private ReusableBufferQueue mReusableBufferQueue = new ReusableBufferQueue();
private ReusableBufferQueue mReusableBufferQueue = new ReusableBufferQueue("RealFIRFilter2");
private float[] mData;
private float[] mCoefficients;

51
src/main/java/io/github/dsheirer/dsp/filter/resample/RealResampler.java
View File

@@ -20,21 +20,20 @@ import com.laszlosystems.libresample4j.SampleBuffers;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.buffer.ReusableBufferQueue;
import io.github.dsheirer.sample.real.RealBuffer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.nio.ByteBuffer;
import java.nio.FloatBuffer;
public class RealResampler implements Listener<RealBuffer>
public class RealResampler
{
protected static final Logger mLog = LoggerFactory.getLogger(RealResampler.class);
private ReusableBufferQueue mReusableBufferQueue = new ReusableBufferQueue("RealResampler");
private Resampler mResampler;
private Listener<ReusableBuffer> mResampledListener;
private BufferManager mBufferManager = new BufferManager();
private ReusableBufferQueue mReusableBufferQueue = new ReusableBufferQueue("RealResampler");
private double mResampleFactor;
/**
@@ -50,12 +49,11 @@ public class RealResampler implements Listener<RealBuffer>
/**
* Primary input method to the resampler
* @param realBuffer to resample
* @param reusableBuffer to resample
*/
@Override
public void receive(RealBuffer realBuffer)
public void resample(ReusableBuffer reusableBuffer)
{
mBufferManager.load(realBuffer);
mBufferManager.load(reusableBuffer);
mResampler.process(mResampleFactor, mBufferManager, false);
}
@@ -74,25 +72,10 @@ public class RealResampler implements Listener<RealBuffer>
*/
public class BufferManager implements SampleBuffers
{
private int mBufferLength = 1000;
private int mBufferLength = 8000;
private FloatBuffer mInputBuffer = ByteBuffer.allocate(mBufferLength).asFloatBuffer();
private FloatBuffer mOutputBuffer = ByteBuffer.allocate(mBufferLength).asFloatBuffer();
public void resize(int bufferLength)
{
int floatBufferLength = bufferLength * 4;
FloatBuffer inputBuffer = ByteBuffer.allocate(floatBufferLength).asFloatBuffer();
inputBuffer.put(mInputBuffer);
mInputBuffer = inputBuffer;
FloatBuffer outputBuffer = ByteBuffer.allocate(floatBufferLength).asFloatBuffer();
outputBuffer.put(mOutputBuffer);
mOutputBuffer = outputBuffer;
mBufferLength = bufferLength;
}
/**
* Current length of the input and output buffers
*/
@@ -104,16 +87,10 @@ public class RealResampler implements Listener<RealBuffer>
/**
* Queues the buffer sample for resampling
*/
public void load(RealBuffer realBuffer)
public void load(ReusableBuffer reusableBuffer)
{
int remaining = mInputBuffer.remaining();
if(mInputBuffer.remaining() < realBuffer.getSamples().length)
{
resize(mInputBuffer.capacity() + (realBuffer.getSamples().length - mInputBuffer.remaining()));
}
mInputBuffer.put(realBuffer.getSamples());
mInputBuffer.put(reusableBuffer.getSamples());
reusableBuffer.decrementUserCount();
}
@Override
@@ -147,9 +124,10 @@ public class RealResampler implements Listener<RealBuffer>
{
mOutputBuffer.put(samples, offset, length);
while(mOutputBuffer.position() > 200)
while(mOutputBuffer.position() > 1000)
{
ReusableBuffer outputBuffer = mReusableBufferQueue.getBuffer(200);
ReusableBuffer outputBuffer = mReusableBufferQueue.getBuffer(1000);
outputBuffer.incrementUserCount();
mOutputBuffer.flip();
mOutputBuffer.get(outputBuffer.getSamples());
@@ -157,9 +135,12 @@ public class RealResampler implements Listener<RealBuffer>
if(mResampledListener != null)
{
outputBuffer.incrementUserCount();
mResampledListener.receive(outputBuffer);
}
else
{
outputBuffer.decrementUserCount();
}
}
}
}

72
src/main/java/io/github/dsheirer/dsp/fm/FMDemodulator.java
View File

@@ -17,19 +17,47 @@
******************************************************************************/
package io.github.dsheirer.dsp.fm;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.buffer.ReusableBufferQueue;
import io.github.dsheirer.sample.buffer.ReusableComplexBuffer;
import io.github.dsheirer.sample.complex.Complex;
public abstract class FMDemodulator
/**
* FM Demodulator for demodulating complex samples and producing demodulated floating point samples.
*/
public class FMDemodulator
{
private ReusableBufferQueue mReusableBufferQueue = new ReusableBufferQueue("FMDemodulator");
private float mPreviousI = 0.0f;
private float mPreviousQ = 0.0f;
protected float mGain;
/**
* Creates an FM demodulator instance with a default gain of 1.0.
*/
public FMDemodulator()
{
this(1.0f);
}
/**
* Creates an FM demodulator instance and applies the gain value to each demodulated output sample.
* @param gain to apply to demodulated samples.
*/
public FMDemodulator(float gain)
{
mGain = gain;
}
/**
* Demodulates the I/Q sample via complex sample multiplication by the complex conjugates of the most recently
* demodulated complex sample (ie previous sample). Each new sample overwrites the previously stored sample to
* allow future invocations of the method to simply use a new sample value.
*
* @param currentI of the sample
* @param currentQ of the sample
* @return demodulated sample
*/
public float demodulate(float currentI, float currentQ)
{
/**
@@ -65,6 +93,12 @@ public abstract class FMDemodulator
return (float)(angle * mGain);
}
/**
* Demodulates the complex samples and returns the demodulated value.
* @param previous
* @param current
* @return
*/
public static double demodulate(Complex previous, Complex current)
{
double inphase = (current.inphase() * previous.inphase()) - (current.quadrature() * -previous.quadrature());
@@ -88,14 +122,48 @@ public abstract class FMDemodulator
return angle;
}
public abstract void dispose();
/**
* Demodulates the complex baseband sample buffer and returns a demodulated reusable buffer with the user count
* set to 1. The complex baseband buffer's user count is decremented after demodulation.
*
* @param basebandSampleBuffer containing samples to demodulate
* @return demodulated sample buffer.
*/
public ReusableBuffer demodulate(ReusableComplexBuffer basebandSampleBuffer)
{
ReusableBuffer demodulatedBuffer = mReusableBufferQueue.getBuffer(basebandSampleBuffer.getSampleCount());
float[] basebandSamples = basebandSampleBuffer.getSamples();
float[] demodulatedSamples = demodulatedBuffer.getSamples();
for(int x = 0; x < basebandSamples.length; x += 2)
{
demodulatedSamples[x / 2] = demodulate(basebandSamples[x], basebandSamples[x + 1]);
}
basebandSampleBuffer.decrementUserCount();
demodulatedBuffer.incrementUserCount();
return demodulatedBuffer;
}
public void dispose()
{
//no-op
}
/**
* Resets this demodulator by zeroing the stored previous sample.
*/
public void reset()
{
mPreviousI = 0.0f;
mPreviousQ = 0.0f;
}
/**
* Sets the gain to the specified level.
*/
public void setGain(float gain)
{
mGain = gain;

78
src/main/java/io/github/dsheirer/dsp/fm/FMDemodulator_CB.java
View File

@@ -1,78 +0,0 @@
/*******************************************************************************
* SDR Trunk
* Copyright (C) 2014,2015 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
******************************************************************************/
package io.github.dsheirer.dsp.fm;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.complex.ComplexBuffer;
import io.github.dsheirer.sample.real.RateCounter_RB;
import io.github.dsheirer.sample.real.RealBuffer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class FMDemodulator_CB extends FMDemodulator implements Listener<ComplexBuffer>
{
private final static Logger mLog = LoggerFactory.getLogger( FMDemodulator_CB.class );
private Listener<RealBuffer> mListener;
private RateCounter_RB mRateCounter = new RateCounter_RB( "FM DEMOD OUTPUT" );
public FMDemodulator_CB( float gain )
{
super( gain );
}
@Override
public void receive( ComplexBuffer buffer )
{
if( mListener != null )
{
float[] samples = buffer.getSamples();
int half = samples.length / 2;
float[] demodulated = new float[ half ];
for( int x = 0; x < half; x++ )
{
int index = x * 2;
demodulated[ x ] = demodulate( samples[ index ],
samples[ index + 1 ] );
}
mListener.receive( new RealBuffer( demodulated ) );
}
}
public void setListener( Listener<RealBuffer> listener )
{
mListener = listener;
}
public void removeListener()
{
mListener = null;
}
@Override
public void dispose()
{
mListener = null;
}
}

102
src/main/java/io/github/dsheirer/dsp/fm/FMDiscriminator.java
View File

@@ -1,102 +0,0 @@
/*******************************************************************************
* SDR Trunk
* Copyright (C) 2014,2015 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
******************************************************************************/
package io.github.dsheirer.dsp.fm;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.complex.Complex;
import io.github.dsheirer.sample.real.RealSampleListener;
@Deprecated
public class FMDiscriminator implements Listener<Complex>
{
private RealSampleListener mListener;
private Complex mPreviousSample = new Complex( 0.0f, 0.0f );
private double mGain;
/**
* Implements a polar discriminator with ArcTangent angle estimator to
* demodulate complex sampled frequency modulated signals.
*
* @param gain - gain to be applied to the demodulated output - can be
* dynamically applied to continuously adjust audio output
*/
public FMDiscriminator( double gain )
{
mGain = gain;
}
public void dispose()
{
mListener = null;
mPreviousSample = null;
}
public synchronized void setGain( double gain )
{
mGain = gain;
}
@Override
public void receive( Complex currentSample )
{
/**
* Multiply the current sample against the complex conjugate of the
* previous sample to derive the phase delta between the two samples
*
* Negating the previous sample quadrature produces the conjugate
*/
double i = ( currentSample.inphase() * mPreviousSample.inphase() ) -
( currentSample.quadrature() * -mPreviousSample.quadrature() );
double q = ( currentSample.quadrature() * mPreviousSample.inphase() ) +
( currentSample.inphase() * -mPreviousSample.quadrature() );
double angle;
//Check for divide by zero
if( i == 0 )
{
angle = 0.0;
}
else
{
/**
* Use the arc-tangent of imaginary (q) divided by real (i) to
* get the phase angle (+/-) which was directly manipulated by the
* original message waveform during the modulation. This value now
* serves as the instantaneous amplitude of the demodulated signal
*/
double denominator = 1.0d / i;
angle = Math.atan( (double)q * denominator );
}
if( mListener != null )
{
mListener.receive( (float)( angle * mGain ) );
}
/**
* Store the current sample to use during the next iteration
*/
mPreviousSample = currentSample;
}
public void setListener( RealSampleListener listener )
{
mListener = listener;
}
}

24
src/main/java/io/github/dsheirer/dsp/fsk/ISyncStateListener.java Normal file
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@@ -0,0 +1,24 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.dsp.fsk;
/**
* Interface to receive sync state change events.
*/
public interface ISyncStateListener
{
void setSyncState(SyncState syncState);
}

221
src/main/java/io/github/dsheirer/dsp/fsk/LTRDecoder.java Normal file
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@@ -0,0 +1,221 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.dsp.fsk;
import io.github.dsheirer.dsp.filter.dc.IIRSinglePoleDCRemovalFilter;
import io.github.dsheirer.dsp.filter.design.FilterDesignException;
import io.github.dsheirer.dsp.filter.fir.FIRFilterSpecification;
import io.github.dsheirer.dsp.filter.fir.real.RealFIRFilter2;
import io.github.dsheirer.dsp.filter.fir.remez.RemezFIRFilterDesigner;
import io.github.dsheirer.dsp.symbol.ISyncDetectListener;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Logic Trunked Radio (LTR) 300-baud FSK decoder is designed to operate against an 8 kHz FM demodulated audio stream.
*
* This decoder employs a zero-crossing timing error detector with adjustable symbol timing error gain. This decoder
* also employs a synchronization monitor that automatically adjusts symbol timing error gain according to the quantity
* of successful message sync pattern detections. This is optimized for LTR signals that periodically transmit idle
* bursts and transmit continuous message streams during voice transmissions. The synchronization monitor adjusts to an
* aggressive gain value when sync is lost and automatically reduces timing error gain as successive sync pattern
* detections occur.
*
* FM demodulated sample buffers should not be filtered prior to this decoder. An internal DC-removal filter coupled
* with a low-pass filter removes any tuning offset and/or audio components above 300 Hertz. The DC removal filter is
* adjusted for a slower offset removal in order to prevent overly distorting the FSK signalling component. This mild
* adjustment may not fully compensate for mis-tuned signals and may result in missed decodes of idle bursts. However,
* the DC filter will track a mis-tuned signal to baseband quickly upon a continuous transmission.
*/
public class LTRDecoder implements Listener<ReusableBuffer>, ISyncDetectListener, ISyncStateListener
{
private final static Logger mLog = LoggerFactory.getLogger(LTRDecoder.class);
public static final float SAMPLES_PER_SYMBOL = 8000.0f / 300.0f;
protected static final float COARSE_TIMING_GAIN = 1.0f / 3.0f;
protected static final float MEDIUM_TIMING_GAIN = 1.0f / 4.0f;
protected static final float FINE_TIMING_GAIN = 1.0f / 5.0f;
private static float[] sLowPassFilterCoefficients;
static
{
FIRFilterSpecification specification = FIRFilterSpecification.lowPassBuilder()
.sampleRate(8000)
.gridDensity(16)
.oddLength(true)
.passBandCutoff(300)
.passBandAmplitude(1.0)
.passBandRipple(0.01)
.stopBandStart(500)
.stopBandAmplitude(0.0)
.stopBandRipple(0.03) //Approximately 60 dB attenuation
.build();
try
{
RemezFIRFilterDesigner designer = new RemezFIRFilterDesigner(specification);
if(designer.isValid())
{
sLowPassFilterCoefficients = designer.getImpulseResponse();
}
}
catch(FilterDesignException fde)
{
mLog.error("Filter design error", fde);
}
}
protected float mSymbolTimingGain = COARSE_TIMING_GAIN;
protected SampleBuffer mSampleBuffer;
protected ZeroCrossingErrorDetector mTimingErrorDetector = new ZeroCrossingErrorDetector(SAMPLES_PER_SYMBOL);
protected SynchronizationMonitor mSynchronizationMonitor;
private IIRSinglePoleDCRemovalFilter mDCFilter = new IIRSinglePoleDCRemovalFilter(0.99999f);
private RealFIRFilter2 mLowPassFilter = new RealFIRFilter2(sLowPassFilterCoefficients);
private Listener<Boolean> mSymbolDecisionListener;
private boolean mSampleDecision;
/**
* Implements a Logic Trunked Radio sub-audible 300 baud FSK signaling decoder
*
* @param messageLength in symbols
*/
public LTRDecoder(int messageLength)
{
this(messageLength, new SampleBuffer(SAMPLES_PER_SYMBOL, COARSE_TIMING_GAIN),
new ZeroCrossingErrorDetector(SAMPLES_PER_SYMBOL));
}
/**
* Implements a Logic Trunked Radio sub-audible 300 baud FSK signaling decoder.
*
* @param messageLength in symbols
* @param sampleBuffer to use for storing sample decisions
* @param detector for symbol timing errors
*/
public LTRDecoder(int messageLength, SampleBuffer sampleBuffer, ZeroCrossingErrorDetector detector)
{
mSynchronizationMonitor = new SynchronizationMonitor(messageLength);
mSynchronizationMonitor.setListener(this);
mTimingErrorDetector = detector;
mSampleBuffer = sampleBuffer;
mSampleBuffer.setTimingGain(mSymbolTimingGain);
}
/**
* Implements the ISyncDetectedListener interface to be notified of message sync detection events.
*
* This allows the internal timing error detector to adjust symbol timing error gain levels according to the
* message synchronization state to quickly adjust to initial signal streams or to reduce gain levels once
* synchronization has been achieved.
*/
@Override
public void syncDetected()
{
mSynchronizationMonitor.syncDetected();
}
/**
* Processes the buffer samples by converting all samples to boolean values reflecting if the sample value is
* greater than zero (or not). Average symbol timing offset is calculated for the full buffer and the offset is
* adjusted and then each of the symbols are decoded using a simple majority decision.
*
* @param buffer containing 8.0 kHz unfiltered FM demodulated audio samples with sub-audible LTR signalling.
*/
@Override
public void receive(ReusableBuffer buffer)
{
ReusableBuffer dcFiltered = mDCFilter.filter(buffer);
ReusableBuffer lowPassFiltered = mLowPassFilter.filter(dcFiltered);
for(float sample : lowPassFiltered.getSamples())
{
mSampleDecision = sample > 0.0;
mSampleBuffer.receive(mSampleDecision);
mTimingErrorDetector.receive(mSampleDecision);
if(mSampleBuffer.hasSymbol())
{
if(mSymbolDecisionListener != null)
{
mSymbolDecisionListener.receive(mSampleBuffer.getSymbol());
}
mSampleBuffer.resetAndAdjust(-mTimingErrorDetector.getError());
mSynchronizationMonitor.increment();
}
}
lowPassFiltered.decrementUserCount();
}
/**
* Registers a listener to receive decoded LTR symbols.
*
* @param listener to receive symbols.
*/
public void setListener(Listener<Boolean> listener)
{
mSymbolDecisionListener = listener;
}
/**
* Removes the symbol listener from receiving decoded LTR symbols.
*/
public void removeListener()
{
mSymbolDecisionListener = null;
}
/**
* Implements the ISyncStateListener interface to receive synchronization state events and adjust the symbol timing
* error gain levels on the internal timing error detector.
*
* Gain levels are defined relative to a unit gain of 1.0 over a number of symbol periods. LTR uses an initial
* ramp-up symbol reversal pattern of 0101 which provides three zero crossing detection opportunities for the timing
* error detector, therefore we react to a COARSE gain state to average timing error over 3 symbols.
*
* @param syncState from an external synchronization state monitor
*/
@Override
public void setSyncState(SyncState syncState)
{
switch(syncState)
{
case FINE:
mSymbolTimingGain = FINE_TIMING_GAIN;
break;
case MEDIUM:
mSymbolTimingGain = MEDIUM_TIMING_GAIN;
break;
case COARSE:
mSymbolTimingGain = COARSE_TIMING_GAIN;
break;
default:
throw new IllegalArgumentException("Unrecognized sync state level: " + syncState.name());
}
mSampleBuffer.setTimingGain(mSymbolTimingGain);
}
}

40
src/main/java/io/github/dsheirer/dsp/fsk/LTRDecoderInstrumented.java Normal file
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@@ -0,0 +1,40 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.dsp.fsk;
public class LTRDecoderInstrumented extends LTRDecoder
{
/**
* Instrumented extension to LTRDecoder
*
* @param messageLength in symbols
*/
public LTRDecoderInstrumented(int messageLength)
{
super(messageLength, new SampleBufferInstrumented(SAMPLES_PER_SYMBOL, COARSE_TIMING_GAIN),
new ZeroCrossingErrorDetectorInstrumented(SAMPLES_PER_SYMBOL));
}
public SampleBufferInstrumented getSampleBuffer()
{
return (SampleBufferInstrumented)mSampleBuffer;
}
public ZeroCrossingErrorDetectorInstrumented getErrorDetector()
{
return (ZeroCrossingErrorDetectorInstrumented)mTimingErrorDetector;
}
}

4
src/main/java/io/github/dsheirer/dsp/fsk/LTRFSKDecoder.java → src/main/java/io/github/dsheirer/dsp/fsk/LTRFSKDecoderLegacy.java
View File

@@ -40,7 +40,7 @@ import io.github.dsheirer.sample.real.RealBuffer;
import java.util.ArrayList;
import java.util.List;
public class LTRFSKDecoder implements Listener<RealBuffer>, Instrumentable
public class LTRFSKDecoderLegacy implements Listener<RealBuffer>, Instrumentable
{
private RealPrimeCICDecimate mCICDecimator;
@@ -72,7 +72,7 @@ public class LTRFSKDecoder implements Listener<RealBuffer>, Instrumentable
* Implements a Logic Trunked Radio sub-audible 300 baud FSK signaling
* decoder. Expects a 48000 sample rate input.
*/
public LTRFSKDecoder()
public LTRFSKDecoderLegacy()
{
mCICDecimator = new RealPrimeCICDecimate( 32, 1, 375, 60, WindowType.HAMMING, 2 );

124
src/main/java/io/github/dsheirer/dsp/fsk/SampleBuffer.java Normal file
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@@ -0,0 +1,124 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.dsp.fsk;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class SampleBuffer
{
private final static Logger mLog = LoggerFactory.getLogger(SampleBuffer.class);
protected boolean[] mDelayLine;
protected int mDelayLinePointer = 0;
protected int mTwiceSamplesPerSymbol;
private int mIntegerSamplesPerSymbol;
private int mHalfIntegerSamplesPerSymbol;
private int mPositiveSampleDecisionCount;
protected int mSymbolStart;
protected int mSymbolEnd;
protected float mSamplesPerSymbol;
protected float mMidSymbolSamplingPoint;
protected float mSymbolTimingGain;
/**
* Buffer to store complex sample data and produce interpolated samples.
* @param samplesPerSymbol
*/
public SampleBuffer(float samplesPerSymbol, float symbolTimingGain)
{
mSamplesPerSymbol = samplesPerSymbol;
mSymbolTimingGain = symbolTimingGain;
mIntegerSamplesPerSymbol = (int)(samplesPerSymbol + 0.5f);
mHalfIntegerSamplesPerSymbol = (int)(samplesPerSymbol / 2.0f + 0.5f);
mMidSymbolSamplingPoint = samplesPerSymbol + mHalfIntegerSamplesPerSymbol;
mTwiceSamplesPerSymbol = (int)Math.floor(2.0 * samplesPerSymbol);
mDelayLine = new boolean[2 * mTwiceSamplesPerSymbol];
}
/**
* Stores the sample in the sample buffer to support making symbol decisions.
*
* Note: use the hasSymbol() method to determine if sufficient samples have been collected to make a symbol
* determination.
*
* @param sample to store in the sample buffer
*/
public void receive(boolean sample)
{
mMidSymbolSamplingPoint--;
mDelayLine[mDelayLinePointer] = sample;
mDelayLine[mDelayLinePointer + mTwiceSamplesPerSymbol] = sample;
//Increment pointer and keep pointer in bounds
mDelayLinePointer++;
mDelayLinePointer = mDelayLinePointer % mTwiceSamplesPerSymbol;
}
/**
* Adjusts samples per symbol and symbol timing counters and increments the sample counter to collect another
* symbol.
*
* @param symbolTimingError from a symbol timing error detector
*/
public void resetAndAdjust(float symbolTimingError)
{
mMidSymbolSamplingPoint += (mSamplesPerSymbol + (symbolTimingError * mSymbolTimingGain));
}
public void setTimingGain(float gain)
{
mSymbolTimingGain = gain;
}
/**
* Indicates if this buffer has accumulated enough samples to represent a full symbol
*/
public boolean hasSymbol()
{
return mMidSymbolSamplingPoint < 1.0f;
}
/**
* Calculates the symbol as a majority decision where the number of positive/true samples are greater than half
* of the samples per symbol. Symbol decision is based on the samples collected over the preceeding 0.5 to 1.5
* symbol periods.
*
* @return a true symbol if the majority of the samples were true or positive, otherwise a false symbol.
*/
public boolean getSymbol()
{
mPositiveSampleDecisionCount = 0;
//Symbol samples are 0.5 and 1.5 symbols ahead of the current buffer pointer, but 0.5 to 1.5 symbol period
//before the most recently stored sample decision.
mSymbolStart = mDelayLinePointer + mHalfIntegerSamplesPerSymbol;
mSymbolEnd = mSymbolStart + mIntegerSamplesPerSymbol;
for(int x = mSymbolStart; x < mSymbolEnd; x++)
{
if(mDelayLine[x])
{
mPositiveSampleDecisionCount++;
}
}
return mPositiveSampleDecisionCount > mHalfIntegerSamplesPerSymbol;
}
}

98
src/main/java/io/github/dsheirer/dsp/fsk/SampleBufferInstrumented.java Normal file
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@@ -0,0 +1,98 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.dsp.fsk;
public class SampleBufferInstrumented extends SampleBuffer
{
public boolean mLastSymbol;
/**
* Buffer to store complex sample data and produce interpolated samples.
*
* @param samplesPerSymbol
* @param symbolTimingGain
*/
public SampleBufferInstrumented(float samplesPerSymbol, float symbolTimingGain)
{
super(samplesPerSymbol, symbolTimingGain);
}
/**
* Sample delay buffer containing boolean (ie positive or negative) samples.
*/
public boolean[] getDelayLine()
{
return mDelayLine;
}
/**
* Current delay buffer pointer which points to where the next sample will be stored and/or the oldest sample in
* the buffer.
*/
public int getDelayLinePointer()
{
return mDelayLinePointer;
}
public int getDelayLineSecondPointer()
{
return mDelayLinePointer + mTwiceSamplesPerSymbol;
}
/**
* Current symbol timing gain value
* @return
*/
public float getSymbolTimingGain()
{
return mSymbolTimingGain;
}
/**
* Current mid-symbol sampling point
*/
public float getMidSymbolSamplingPoint()
{
return mMidSymbolSamplingPoint;
}
public float getSamplesPerSymbol()
{
return mSamplesPerSymbol;
}
@Override
public boolean getSymbol()
{
mLastSymbol = super.getSymbol();
return mLastSymbol;
}
public boolean getLastSymbol()
{
return mLastSymbol;
}
public int getSymbolStart()
{
return mSymbolStart;
}
public int getSymbolEnd()
{
return mSymbolEnd;
}
}

21
src/main/java/io/github/dsheirer/dsp/fsk/SyncState.java Normal file
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@@ -0,0 +1,21 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.dsp.fsk;
public enum SyncState
{
COARSE, MEDIUM, FINE;
}

149
src/main/java/io/github/dsheirer/dsp/fsk/SynchronizationMonitor.java Normal file
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@@ -0,0 +1,149 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.dsp.fsk;
import io.github.dsheirer.dsp.symbol.ISyncDetectListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Monitors a symbol stream and externally provided sync detection events to track the sync state as the number of
* message synchronization events relative the count of symbols that have been decoded to provide synchronization state
* events to a registered listener.
*
* This might be used to provide a control signal to a symbol timing error detector to adjust timing error gain levels.
*
* This class only works with messages of uniform symbol length.
*
* Synchronization States:
*
* -COARSE - default state. demoted from MEDIUM after one message period with no sync detection.
*
* -MEDIUM - promoted from COARSE when one sync detection occurs after two message periods, or demoted from FINE
* after two message periods with no sync detections.
*
* -FINE - promoted from MEDIUM after two or more consecutive sync detections within the preceding two or more
* message periods.
*/
public class SynchronizationMonitor implements ISyncDetectListener
{
private final static Logger mLog = LoggerFactory.getLogger(SynchronizationMonitor.class);
private ISyncStateListener mSyncStateListener;
private SyncState mSyncState = SyncState.COARSE;
private int mSyncCount;
private int mSymbolCount = 0;
private int mMessageLength;
/**
* Constructs the synchronization monitor for the specified message symbol length.
* @param messageLength in symbols.
*/
public SynchronizationMonitor(int messageLength)
{
mMessageLength = messageLength;
}
/**
* Resets to the default state of COARSE
*/
public void reset()
{
setSyncState(SyncState.COARSE);
mSymbolCount = 0;
}
/**
* Updates the sync state and broadcasts any state changes to the registered sync state listener.
*/
private void setSyncState(SyncState syncState)
{
if(mSyncState != syncState)
{
mSyncState = syncState;
if(mSyncStateListener != null)
{
mSyncStateListener.setSyncState(mSyncState);
}
}
}
/**
* Updates the message synchronization state based on the current number of sync detections.
*/
private void updateSyncState()
{
if(mSyncCount < 0)
{
mSyncCount = 0;
//The previous state was also zero, so there are no changes
return;
}
switch(mSyncCount)
{
case 0:
setSyncState(SyncState.COARSE);
break;
case 1:
setSyncState(SyncState.MEDIUM);
break;
default:
setSyncState(SyncState.FINE);
}
//Max is 3 which means state will drop to MEDIUM after 2 elapsed message periods and COARSE after 3 elapsed
// message periods with no sync detection.
if(mSyncCount > 3)
{
mSyncCount = 3;
}
}
/**
* Implements the ISyncDetectionListener interface to be notified when an external entity detects a message
* sync word in the symbol stream.
*/
@Override
public void syncDetected()
{
mSymbolCount = 0;
mSyncCount++;
updateSyncState();
}
/**
* Increments the symbol count for each decoded symbol.
*/
public void increment()
{
mSymbolCount++;
if(mSymbolCount > mMessageLength)
{
mSymbolCount = 0;
mSyncCount--;
updateSyncState();
}
}
public void setListener(ISyncStateListener listener)
{
mSyncStateListener = listener;
}
}

124
src/main/java/io/github/dsheirer/dsp/fsk/ZeroCrossingErrorDetector.java Normal file
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@@ -0,0 +1,124 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.dsp.fsk;
/**
* Zero crossing error detector. Provides symbol timing error correction values by detecting zero-crossings within
* each symbol period. Ideally there should be only 0 or 1 zero crossings within each symbol period. However, when
* there is a slight DC offset in the demodulated samples, there can be up to 2 zero crossings within a symbol
* period.
*
* This detector will only provide error corrections when there are 1 or 2 zero crossings detected. If the number
* of zero crossings is greater than 2, then it is assumed that there is no signal present and the returned timing
* error value is zero. This detector provides an error correction value relative to (approximately) the middle of
* a symbol period and therefore continuously attempts to align zero crossings to the middle of the period.
*
* Since this detector does NOT use interpolation, the error signal will contain minor levels of symbol timing
* jitter. Error signal values are reported as integrals of the sampling period.
*/
public class ZeroCrossingErrorDetector
{
protected boolean[] mBuffer;
protected float mZeroCrossingIdeal;
protected float mZeroCrossingOne;
protected float mZeroCrossingTwo;
protected float mDetectedZeroCrossing;
private int mZeroCrossingCount;
/**
* Constructs the detector for the specified samples per symbol.
*
* @param samplesPerSymbol
*/
public ZeroCrossingErrorDetector(float samplesPerSymbol)
{
mBuffer = new boolean[(int)Math.ceil(samplesPerSymbol)];
mZeroCrossingIdeal = mBuffer.length - 1.5f - (samplesPerSymbol / 2.0f);
}
/**
* Stores the sample in the buffer. Use the getError() method once enough samples have been processed to determine
* the error for a symbol period.
*
* @param sample
*/
public void receive(boolean sample)
{
//Shift all samples left and store new sample at the end
System.arraycopy(mBuffer, 1, mBuffer, 0, mBuffer.length - 1);
mBuffer[mBuffer.length - 1] = sample;
}
/**
* Determines the symbol timing error for the samples processed thus far. This method should be invoked once per
* symbol period, triggered via an external samples per symbol tracking process.
*
* @return symbol timing error calculated as the distance between the approximate symbol center and the next closest
* zero crossing index. An error value of zero is returned if the number of zero crossings is less than one or
* greater than two.
*/
public float getError()
{
mZeroCrossingCount = 0;
for(int x = 0; x < mBuffer.length - 1; x++)
{
if(mBuffer[x] ^ mBuffer[x + 1])
{
if(mZeroCrossingCount == 0)
{
mZeroCrossingCount++;
mZeroCrossingOne = x + 0.5f;
}
else if(mZeroCrossingCount == 1)
{
mZeroCrossingCount++;
mZeroCrossingTwo = x + 0.5f;
}
else
{
//Max zero crossings exceeded - no error can be calculated - abort early
return 0.0f;
}
}
}
if(mZeroCrossingCount == 1)
{
mDetectedZeroCrossing = mZeroCrossingOne;
return mZeroCrossingIdeal - mZeroCrossingOne;
}
else if(mZeroCrossingCount == 2)
{
float errorDistanceOne = mZeroCrossingIdeal - mZeroCrossingOne;
float errorDistanceTwo = mZeroCrossingCount - mZeroCrossingTwo;
if(Math.abs(errorDistanceOne) < Math.abs(errorDistanceTwo))
{
mDetectedZeroCrossing = mZeroCrossingOne;
}
else
{
mDetectedZeroCrossing = mZeroCrossingTwo;
}
return mZeroCrossingIdeal - mDetectedZeroCrossing;
}
return 0.0f;
}
}

58
src/main/java/io/github/dsheirer/dsp/fsk/ZeroCrossingErrorDetectorInstrumented.java Normal file
View File

@@ -0,0 +1,58 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.dsp.fsk;
import javafx.beans.property.SimpleFloatProperty;
public class ZeroCrossingErrorDetectorInstrumented extends ZeroCrossingErrorDetector
{
public SimpleFloatProperty timingError = new SimpleFloatProperty();
/**
* Constructs the detector for the specified samples per symbol.
*
* @param samplesPerSymbol
*/
public ZeroCrossingErrorDetectorInstrumented(float samplesPerSymbol)
{
super(samplesPerSymbol);
}
@Override
public float getError()
{
float error = super.getError();
timingError.setValue(error);
return error;
}
public float getZeroCrossingIdeal()
{
return mZeroCrossingIdeal;
}
public float getDetectedZeroCrossing()
{
return mDetectedZeroCrossing;
}
public boolean[] getBuffer()
{
return mBuffer;
}
}

21
src/main/java/io/github/dsheirer/dsp/symbol/ISyncDetectListener.java Normal file
View File

@@ -0,0 +1,21 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.dsp.symbol;
public interface ISyncDetectListener
{
void syncDetected();
}

27
src/main/java/io/github/dsheirer/dsp/symbol/SyncDetectListener.java
View File

@@ -1,27 +0,0 @@
/*******************************************************************************
* SDR Trunk
* Copyright (C) 2014 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
******************************************************************************/
package io.github.dsheirer.dsp.symbol;
/**
* Interface to allow an external process indicate that it has detected a
* sync pattern in the bit stream
*/
public interface SyncDetectListener
{
public void syncDetected();
}

2
src/main/java/io/github/dsheirer/dsp/symbol/SyncDetectProvider.java
View File

@@ -20,5 +20,5 @@ package io.github.dsheirer.dsp.symbol;
public interface SyncDetectProvider
{
public void setSyncDetectListener( SyncDetectListener listener );
public void setSyncDetectListener( ISyncDetectListener listener );
}

174
src/main/java/io/github/dsheirer/instrument/gui/viewer/PlaybackController.java
View File

@@ -15,13 +15,14 @@
******************************************************************************/
package io.github.dsheirer.instrument.gui.viewer;
import io.github.dsheirer.instrument.gui.viewer.decoder.DecoderPane;
import io.github.dsheirer.instrument.gui.viewer.decoder.AbstractDecoderPane;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.buffer.ReusableBufferBroadcaster;
import io.github.dsheirer.sample.buffer.ReusableComplexBuffer;
import io.github.dsheirer.source.IControllableFileSource;
import io.github.dsheirer.source.IFrameLocationListener;
import io.github.dsheirer.source.wave.ComplexWaveSource;
import io.github.dsheirer.source.wave.RealWaveSource;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
@@ -40,7 +41,7 @@ import javax.sound.sampled.UnsupportedAudioFileException;
import java.io.File;
import java.io.IOException;
public class PlaybackController extends HBox implements IFrameLocationListener, Listener<ReusableComplexBuffer>
public class PlaybackController extends HBox implements IFrameLocationListener
{
private final static Logger mLog = LoggerFactory.getLogger(PlaybackController.class);
@@ -48,15 +49,17 @@ public class PlaybackController extends HBox implements IFrameLocationListener,
private TextField mPlaybackPositionText;
private Button mPlay1Button;
private Button mPlay10Button;
private Button mPlay30Button;
private Button mPlay100Button;
private Button mPlay1000Button;
private Button mPlay2000Button;
private HBox mControlsBox;
private Label mFileLabel;
private EventHandler<ActionEvent> mPlayEventHandler;
private DecoderPane mSampleRateListener;
private AbstractDecoderPane mSampleRateListener;
private IControllableFileSource mControllableFileSource;
private ReusableBufferBroadcaster mComplexBufferBroadcaster = new ReusableBufferBroadcaster();
private ReusableBufferBroadcaster mReusableBufferBroadcaster = new ReusableBufferBroadcaster();
public PlaybackController()
{
@@ -64,10 +67,10 @@ public class PlaybackController extends HBox implements IFrameLocationListener,
getChildren().addAll(getControlsBox(), getFileLabel());
setControlsEnabled(false);
disableControls();
}
public void setSampleRateListener(DecoderPane decoderPane)
public void setSampleRateListener(AbstractDecoderPane decoderPane)
{
mSampleRateListener = decoderPane;
@@ -81,38 +84,76 @@ public class PlaybackController extends HBox implements IFrameLocationListener,
{
if(file != null && file.isFile())
{
try
if(ComplexWaveSource.supports(file))
{
mControllableFileSource = new ComplexWaveSource(file);
mControllableFileSource.setListener(this);
((ComplexWaveSource)mControllableFileSource).setListener((Listener<ReusableComplexBuffer>)this);
mControllableFileSource.open();
if(mSampleRateListener != null)
try
{
mSampleRateListener.setSampleRate(mControllableFileSource.getSampleRate());
mControllableFileSource = new ComplexWaveSource(file);
mControllableFileSource.setListener(this);
((ComplexWaveSource)mControllableFileSource).setListener(mReusableBufferBroadcaster);
mControllableFileSource.open();
if(mSampleRateListener != null)
{
mSampleRateListener.setSampleRate(mControllableFileSource.getSampleRate());
}
}
}
catch(UnsupportedAudioFileException e)
{
mLog.error("Unsupported Audio File Type [" + (file != null ? file.getAbsolutePath() : "null") + "]");
catch(UnsupportedAudioFileException e)
{
mLog.error("Unsupported Audio File Type [" + (file != null ? file.getAbsolutePath() : "null") + "]");
Alert alert = new Alert(Alert.AlertType.ERROR, "The file type is unsupported.", ButtonType.OK);
alert.show();
return;
}
catch(IOException ioe)
{
mLog.error("Error opening file [" + (file != null ? file.getAbsolutePath() : "null") + "]", ioe);
Alert alert = new Alert(Alert.AlertType.ERROR, "The file type is unsupported.", ButtonType.OK);
alert.show();
return;
}
catch(IOException ioe)
{
mLog.error("Error opening file [" + (file != null ? file.getAbsolutePath() : "null") + "]", ioe);
Alert alert = new Alert(Alert.AlertType.ERROR, "There was an error opening the file",
ButtonType.OK);
alert.show();
return;
Alert alert = new Alert(Alert.AlertType.ERROR, "There was an error opening the file",
ButtonType.OK);
alert.show();
return;
}
enableControls();
}
else if(RealWaveSource.supports(file))
{
try
{
mControllableFileSource = new RealWaveSource(file);
mControllableFileSource.setListener(this);
((RealWaveSource)mControllableFileSource).setListener(mReusableBufferBroadcaster);
mControllableFileSource.open();
if(mSampleRateListener != null)
{
mSampleRateListener.setSampleRate(mControllableFileSource.getSampleRate());
}
}
catch(UnsupportedAudioFileException e)
{
mLog.error("Unsupported Audio File Type [" + (file != null ? file.getAbsolutePath() : "null") + "]");
Alert alert = new Alert(Alert.AlertType.ERROR, "The file type is unsupported.", ButtonType.OK);
alert.show();
return;
}
catch(IOException ioe)
{
mLog.error("Error opening file [" + (file != null ? file.getAbsolutePath() : "null") + "]", ioe);
Alert alert = new Alert(Alert.AlertType.ERROR, "There was an error opening the file",
ButtonType.OK);
alert.show();
return;
}
enableControls();
}
getFileLabel().setText(file.getName());
setControlsEnabled(true);
}
}
@@ -130,36 +171,49 @@ public class PlaybackController extends HBox implements IFrameLocationListener,
}
}
setControlsEnabled(false);
disableControls();
}
/**
* Adds listener to receive complex buffers from this playback
*/
public void addListener(Listener<ReusableComplexBuffer> listener)
public void addListener(Listener<ReusableBuffer> listener)
{
mComplexBufferBroadcaster.addListener(listener);
mReusableBufferBroadcaster.addListener(listener);
}
/**
* Removes the listener from receiving complex buffers from this playback
*/
public void removeListener(Listener<ReusableComplexBuffer> listener)
public void removeListener(Listener<ReusableBuffer> listener)
{
mComplexBufferBroadcaster.removeListener(listener);
mReusableBufferBroadcaster.removeListener(listener);
}
/**
* Sets all of the playback controls to the specified enabled state.
*/
private void setControlsEnabled(boolean enabled)
private void disableControls()
{
getRewindButton().setDisable(!enabled);
getPlaybackPositionText().setDisable(!enabled);
getPlay1Button().setDisable(!enabled);
getPlay10Button().setDisable(!enabled);
getPlay100Button().setDisable(!enabled);
getPlay1000Button().setDisable(!enabled);
getRewindButton().setDisable(true);
getPlaybackPositionText().setDisable(true);
getPlay1Button().setDisable(true);
getPlay10Button().setDisable(true);
getPlay100Button().setDisable(true);
getPlay1000Button().setDisable(true);
}
/**
* Sets all of the playback controls to the specified enabled state.
*/
private void enableControls()
{
getRewindButton().setDisable(false);
getPlaybackPositionText().setDisable(false);
getPlay1Button().setDisable(false);
getPlay10Button().setDisable(false);
getPlay100Button().setDisable(false);
getPlay1000Button().setDisable(false);
}
private HBox getControlsBox()
@@ -169,7 +223,7 @@ public class PlaybackController extends HBox implements IFrameLocationListener,
mControlsBox = new HBox();
mControlsBox.getChildren().addAll(getRewindButton(), getPlaybackPositionText(), getPlay1Button(),
getPlay10Button(), getPlay100Button(), getPlay1000Button());
getPlay10Button(), getPlay30Button(), getPlay100Button(), getPlay1000Button(), getPlay2000Button());
}
return mControlsBox;
@@ -213,6 +267,19 @@ public class PlaybackController extends HBox implements IFrameLocationListener,
return mPlay10Button;
}
private Button getPlay30Button()
{
if(mPlay30Button == null)
{
mPlay30Button = new Button("30");
mPlay30Button.setUserData(30);
mPlay30Button.setOnAction(getPlaybackEventHandler());
mPlay30Button.setGraphic(new FontIcon(FontAwesome.FAST_FORWARD));
}
return mPlay30Button;
}
private Button getPlay100Button()
{
if(mPlay100Button == null)
@@ -239,6 +306,19 @@ public class PlaybackController extends HBox implements IFrameLocationListener,
return mPlay1000Button;
}
private Button getPlay2000Button()
{
if(mPlay2000Button == null)
{
mPlay2000Button = new Button("2000");
mPlay2000Button.setUserData(2000);
mPlay2000Button.setOnAction(getPlaybackEventHandler());
mPlay2000Button.setGraphic(new FontIcon(FontAwesome.FAST_FORWARD));
}
return mPlay2000Button;
}
private EventHandler<ActionEvent> getPlaybackEventHandler()
{
if(mPlayEventHandler == null)
@@ -302,10 +382,4 @@ public class PlaybackController extends HBox implements IFrameLocationListener,
{
mLog.info("Frame location reset ... ignoring?");
}
@Override
public void receive(ReusableComplexBuffer complexBuffer)
{
mComplexBufferBroadcaster.broadcast(complexBuffer);
}
}

8
src/main/java/io/github/dsheirer/instrument/gui/viewer/ViewerDesktop.java
View File

@@ -15,7 +15,7 @@
******************************************************************************/
package io.github.dsheirer.instrument.gui.viewer;
import io.github.dsheirer.instrument.gui.viewer.decoder.DecoderPane;
import io.github.dsheirer.instrument.gui.viewer.decoder.AbstractDecoderPane;
import io.github.dsheirer.instrument.gui.viewer.decoder.DecoderPaneFactory;
import io.github.dsheirer.module.decode.DecoderType;
import io.github.dsheirer.module.decode.p25.P25Decoder;
@@ -26,7 +26,7 @@ import java.io.File;
public class ViewerDesktop extends BorderPane
{
private PlaybackController mPlaybackController;
private DecoderPane mDecoderPane = DecoderPaneFactory.getDefaultPane();
private AbstractDecoderPane mDecoderPane = DecoderPaneFactory.getDefaultPane();
public ViewerDesktop()
{
@@ -50,7 +50,7 @@ public class ViewerDesktop extends BorderPane
setDecoderPane(DecoderPaneFactory.getP25DecoderPane(modulation));
}
private void setDecoderPane(DecoderPane decoderPane)
private void setDecoderPane(AbstractDecoderPane decoderPane)
{
getPlaybackController().removeListener(getDecoderPane());
getChildren().remove(getDecoderPane());
@@ -63,7 +63,7 @@ public class ViewerDesktop extends BorderPane
/**
* Decoder pane
*/
public DecoderPane getDecoderPane()
public AbstractDecoderPane getDecoderPane()
{
if(mDecoderPane == null)
{

85
src/main/java/io/github/dsheirer/instrument/gui/viewer/chart/RealSampleLineChart.java Normal file
View File

@@ -0,0 +1,85 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.instrument.gui.viewer.chart;
import io.github.dsheirer.buffer.RealCircularBuffer;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.scene.layout.StackPane;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class RealSampleLineChart extends LineChart implements Listener<ReusableBuffer>
{
private final static Logger mLog = LoggerFactory.getLogger(RealSampleLineChart.class);
private ObservableList<Data<Integer,Float>> mSamples = FXCollections.observableArrayList();
private Series<Integer,Float> mSampleSeries = new Series<>("Samples", mSamples);
private RealCircularBuffer mRealCircularBuffer;
public RealSampleLineChart(int length, double tickUnit)
{
super(new NumberAxis("Samples", 0, length, tickUnit),
new NumberAxis("Value", -1.0, 1.0, 0.25));
ObservableList<Series<Integer,Float>> observableList = FXCollections.observableArrayList(mSampleSeries);
setData(observableList);
init(length);
}
private void init(int length)
{
mRealCircularBuffer = new RealCircularBuffer(length);
for(int x = 0; x < length; x++)
{
Data<Integer,Float> sample = new Data<>(x, 0.0f);
mSamples.add(sample);
}
//Turn off the data point marker symbols
for(XYChart.Data data: mSampleSeries.getData())
{
StackPane stackPane = (StackPane)data.getNode();
stackPane.setVisible(false);
}
}
@Override
public void receive(ReusableBuffer buffer)
{
for(float sample: buffer.getSamples())
{
mRealCircularBuffer.put(sample);
}
float[] bufferSamples = mRealCircularBuffer.get();
for(int x = 0; x < bufferSamples.length; x++)
{
Data<Integer,Float> sample = mSamples.get(x);
sample.setYValue(bufferSamples[x]);
}
buffer.decrementUserCount();
}
}

171
src/main/java/io/github/dsheirer/instrument/gui/viewer/chart/SampleBufferChart.java Normal file
View File

@@ -0,0 +1,171 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.instrument.gui.viewer.chart;
import io.github.dsheirer.module.decode.ltrnet.LTRNetDecoderInstrumented;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.NumberAxis;
import javafx.scene.layout.StackPane;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class SampleBufferChart extends LineChart
{
private final static Logger mLog = LoggerFactory.getLogger(SampleBufferChart.class);
private ObservableList<Data<Integer,Float>> mSamples = FXCollections.observableArrayList();
private Series<Integer,Float> mSampleSeries = new Series<>("Samples", mSamples);
private ObservableList<Data<Number,Number>> mSamplePoints = FXCollections.observableArrayList();
private Series<Number,Number> mSamplePointSeries = new Series<>("Pointers", mSamplePoints);
private ObservableList<Data<Number,Number>> mSymbolSamples = FXCollections.observableArrayList();
private Series<Number,Number> mSymbolSamplesSeries = new Series<>("Next Symbol Samples", mSymbolSamples);
private ObservableList<Data<Number,Number>> mSymbol = FXCollections.observableArrayList();
private Series<Number,Number> mSymbolSeries = new Series<>("Previous Symbol", mSymbol);
private ObservableList<Data<Number,Number>> mZeroCrossing = FXCollections.observableArrayList();
private Series<Number,Number> mZeroCrossingSeries = new Series<>("Zero Crossing", mZeroCrossing);
private LTRNetDecoderInstrumented mLTRNetDecoderInstrumented;
public SampleBufferChart(LTRNetDecoderInstrumented decoder, int length)
{
super(new NumberAxis("Samples", 0, length, 5),
new NumberAxis("Value", -1.0, 1.0, 0.25));
ObservableList<Series> observableList = FXCollections.observableArrayList(mSampleSeries, mSamplePointSeries,
mSymbolSamplesSeries, mSymbolSeries, mZeroCrossingSeries);
setData(observableList);
mLTRNetDecoderInstrumented = decoder;
decoder.bufferCount.addListener(new BufferChangeListener());
decoder.getLTRDecoder().getErrorDetector().timingError.addListener(new ErrorChangeListener());
}
public void setBuffer(boolean[] buffer)
{
while(mSamples.size() < buffer.length)
{
Data<Integer,Float> sample = new Data<>(mSamples.size(), 0.0f);
mSamples.add(sample);
//Turn off the data point marker symbols - yes I know this is inefficient
for(Data data: mSampleSeries.getData())
{
StackPane stackPane = (StackPane)data.getNode();
stackPane.setVisible(false);
}
}
for(int x = 0; x < buffer.length; x++)
{
Data<Integer,Float> sample = mSamples.get(x);
sample.setYValue(buffer[x] ? 0.5f : -0.5f);
}
}
public class BufferChangeListener implements ChangeListener
{
@Override
public void changed(ObservableValue observable, Object oldValue, Object newValue)
{
setBuffer(mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLine());
while(mSymbol.size() < 2)
{
Data<Number,Number> sample = new Data<>(0.0, -0.55);
mSymbol.add(sample);
}
while(mZeroCrossing.size() < 2)
{
Data<Number,Number> sample = new Data<>(0.0, -0.65);
mZeroCrossing.add(sample);
}
while(mSamplePoints.size() < 2)
{
Data<Number,Number> sample = new Data<>(0.0, -0.75);
mSamplePoints.add(sample);
}
while(mSymbolSamples.size() < 2)
{
Data<Number,Number> sample = new Data<>(0.0, -0.85);
mSymbolSamples.add(sample);
}
int pointer1 = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLinePointer();
int pointer2 = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLineSecondPointer();
mSamplePoints.get(0).setXValue(pointer1);
mSamplePoints.get(1).setXValue(pointer2);
float samplesRemaining = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getMidSymbolSamplingPoint();
float samplesPerSymbol = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getSamplesPerSymbol();
float start = pointer1 + samplesRemaining;
float end = start + samplesPerSymbol;
mSymbolSamples.get(0).setXValue(start);
mSymbolSamples.get(1).setXValue(end);
boolean symbol = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getLastSymbol();
int symbolStart = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getSymbolStart();
int symbolEnd = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getSymbolEnd();
mSymbol.get(0).setXValue(symbolStart);
mSymbol.get(0).setYValue(symbol ? 0.55f : -0.55f);
mSymbol.get(1).setXValue(symbolEnd);
mSymbol.get(1).setYValue(symbol ? 0.55f : -0.55f);
}
}
public class ErrorChangeListener implements ChangeListener
{
@Override
public void changed(ObservableValue observable, Object oldValue, Object newValue)
{
while(mZeroCrossing.size() < 2)
{
Data<Number,Number> sample = new Data<>(0.0, -0.65);
mZeroCrossing.add(sample);
}
int pointer1 = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLinePointer();
int pointer2 = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLineSecondPointer();
float zeroCrossingIdeal = mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getZeroCrossingIdeal();
float detectedZeroCrossing = zeroCrossingIdeal - ((Number)newValue).floatValue();
int reference = (zeroCrossingIdeal < pointer1 || detectedZeroCrossing < pointer1 ? pointer2 : pointer1);
reference--;
float start = reference - zeroCrossingIdeal;
float end = reference - detectedZeroCrossing;
mZeroCrossing.get(0).setXValue(start);
mZeroCrossing.get(1).setXValue(end);
}
}
}

132
src/main/java/io/github/dsheirer/instrument/gui/viewer/chart/ZeroCrossingErrorDetectorChart.java Normal file
View File

@@ -0,0 +1,132 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.instrument.gui.viewer.chart;
import io.github.dsheirer.module.decode.ltrnet.LTRNetDecoderInstrumented;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.NumberAxis;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ZeroCrossingErrorDetectorChart extends LineChart
{
private final static Logger mLog = LoggerFactory.getLogger(ZeroCrossingErrorDetectorChart.class);
private ObservableList<Data<Number,Number>> mCurrentSamples = FXCollections.observableArrayList();
private Series<Number,Number> mCurrentSampleSeries = new Series<>("Samples", mCurrentSamples);
private ObservableList<Data<Number,Number>> mPreviousSamples = FXCollections.observableArrayList();
private Series<Number,Number> mPreviousSampleSeries = new Series<>("Samples", mPreviousSamples);
private ObservableList<Data<Number,Number>> mIdeal = FXCollections.observableArrayList();
private Series<Number,Number> mIdealSeries = new Series<>("Ideal", mIdeal);
private ObservableList<Data<Number,Number>> mDetected = FXCollections.observableArrayList();
private Series<Number,Number> mDetectedSeries = new Series<>("Detected", mDetected);
private LTRNetDecoderInstrumented mLTRNetDecoderInstrumented;
public ZeroCrossingErrorDetectorChart(LTRNetDecoderInstrumented decoder, int length)
{
super(new NumberAxis("Samples", 0, length, 5),
new NumberAxis("Value", -1.0, 1.0, 0.25));
ObservableList<Series> observableList = FXCollections.observableArrayList(mCurrentSampleSeries,
mPreviousSampleSeries, mIdealSeries, mDetectedSeries);
setData(observableList);
mLTRNetDecoderInstrumented = decoder;
decoder.getLTRDecoder().getErrorDetector().timingError.addListener(new ErrorChangeListener());
decoder.bufferCount.addListener(new ChangeListener()
{
@Override
public void changed(ObservableValue observable, Object oldValue, Object newValue)
{
updateBuffer();
}
});
for(int x = 0; x < length; x++)
{
Data<Number,Number> sample = new Data<>(x, 0.0f);
mCurrentSamples.add(sample);
Data<Number,Number> sample2 = new Data<>(x, 0.0f);
mPreviousSamples.add(sample2);
}
Data<Number,Number> ideal1 = new Data<>(5, -0.1f);
mIdeal.add(ideal1);
Data<Number,Number> ideal2 = new Data<>(5, -0.9f);
mIdeal.add(ideal2);
Data<Number,Number> detected1 = new Data<>(5, -0.25f);
mDetected.add(detected1);
Data<Number,Number> detected2 = new Data<>(5, -0.75f);
mDetected.add(detected2);
}
private void updateBuffer()
{
boolean[] samples = mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getBuffer();
for(int x = 0; x < samples.length; x++)
{
Data<Number,Number> sample = mCurrentSamples.get(x);
sample.setYValue(samples[x] ? 0.7f : 0.3f);
}
}
public class ErrorChangeListener implements ChangeListener
{
@Override
public void changed(ObservableValue observable, Object oldValue, Object newValue)
{
float error = mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getError();
boolean[] samples = mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getBuffer();
for(int x = 0; x < samples.length; x++)
{
Data<Number,Number> sample = mPreviousSamples.get(x);
sample.setYValue(samples[x] ? -0.4f : -0.6f);
}
Data<Number,Number> ideal1 = mIdeal.get(0);
ideal1.setXValue(mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getZeroCrossingIdeal());
Data<Number,Number> ideal2 = mIdeal.get(1);
ideal2.setXValue(mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getZeroCrossingIdeal());
if(error == 0.0f)
{
Data<Number,Number> detected1 = mDetected.get(0);
detected1.setXValue(0.0f);
Data<Number,Number> detected2 = mDetected.get(1);
detected2.setXValue(0.0f);
}
else
{
Data<Number,Number> detected1 = mDetected.get(0);
detected1.setXValue(mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getDetectedZeroCrossing());
Data<Number,Number> detected2 = mDetected.get(1);
detected2.setXValue(mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getDetectedZeroCrossing());
}
}
}
}

30
src/main/java/io/github/dsheirer/instrument/gui/viewer/decoder/AbstractDecoderPane.java Normal file
View File

@@ -0,0 +1,30 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.instrument.gui.viewer.decoder;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.SampleType;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import javafx.scene.layout.VBox;
public abstract class AbstractDecoderPane<T extends ReusableBuffer> extends VBox implements Listener<T>
{
abstract SampleType getSampleType();
public void setSampleRate(double sampleRate)
{
}
}

18
src/main/java/io/github/dsheirer/instrument/gui/viewer/decoder/DecoderPane.java → src/main/java/io/github/dsheirer/instrument/gui/viewer/decoder/ComplexDecoderPane.java
View File

@@ -17,17 +17,17 @@ package io.github.dsheirer.instrument.gui.viewer.decoder;
import io.github.dsheirer.module.decode.DecoderType;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.SampleType;
import io.github.dsheirer.sample.buffer.ReusableBufferBroadcaster;
import io.github.dsheirer.sample.buffer.ReusableComplexBuffer;
import javafx.scene.layout.VBox;
import javafx.scene.text.Text;
public class DecoderPane extends VBox implements Listener<ReusableComplexBuffer>
public class ComplexDecoderPane extends AbstractDecoderPane<ReusableComplexBuffer>
{
private ReusableBufferBroadcaster mComplexBufferBroadcaster = new ReusableBufferBroadcaster();
private DecoderType mDecoderType;
public DecoderPane(DecoderType decoderType)
public ComplexDecoderPane(DecoderType decoderType)
{
mDecoderType = decoderType;
}
@@ -35,11 +35,17 @@ public class DecoderPane extends VBox implements Listener<ReusableComplexBuffer>
/**
* Package private - used by factory class to create an empty pane
*/
DecoderPane()
ComplexDecoderPane()
{
getChildren().add(new Text("Please select a decoder from the menu"));
}
@Override
SampleType getSampleType()
{
return SampleType.COMPLEX;
}
@Override
public void receive(ReusableComplexBuffer reusableComplexBuffer)
{
@@ -55,8 +61,4 @@ public class DecoderPane extends VBox implements Listener<ReusableComplexBuffer>
{
mComplexBufferBroadcaster.removeListener(listener);
}
public void setSampleRate(double sampleRate)
{
}
}

14
src/main/java/io/github/dsheirer/instrument/gui/viewer/decoder/DecoderPaneFactory.java
View File

@@ -22,15 +22,19 @@ import java.util.EnumSet;
public class DecoderPaneFactory
{
private static final EnumSet<DecoderType> SUPPORTED_DECODER_TYPES = EnumSet.of(DecoderType.P25_PHASE1);
private static final EnumSet<DecoderType> SUPPORTED_DECODER_TYPES =
EnumSet.of(DecoderType.P25_PHASE1,
DecoderType.LTR_NET);
/**
* Creates a decoder pane for the decoder type
*/
public static DecoderPane getDecoderPane(DecoderType decoderType)
public static AbstractDecoderPane getDecoderPane(DecoderType decoderType)
{
switch(decoderType)
{
case LTR_NET:
return new LTRNetPane();
case P25_PHASE1:
throw new IllegalArgumentException("Use the getP25DecoderPane() method for P25 decoder type");
}
@@ -41,7 +45,7 @@ public class DecoderPaneFactory
/**
* Creates a decoder pane for the P25 decoder type
*/
public static DecoderPane getP25DecoderPane(P25Decoder.Modulation modulation)
public static AbstractDecoderPane getP25DecoderPane(P25Decoder.Modulation modulation)
{
switch(modulation)
{
@@ -57,9 +61,9 @@ public class DecoderPaneFactory
/**
* Creates an empty decoder pane
*/
public static DecoderPane getDefaultPane()
public static AbstractDecoderPane getDefaultPane()
{
return new DecoderPane();
return new ComplexDecoderPane();
}
/**

151
src/main/java/io/github/dsheirer/instrument/gui/viewer/decoder/LTRNetPane.java Normal file
View File

@@ -0,0 +1,151 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.instrument.gui.viewer.decoder;
import io.github.dsheirer.instrument.gui.viewer.chart.RealSampleLineChart;
import io.github.dsheirer.instrument.gui.viewer.chart.SampleBufferChart;
import io.github.dsheirer.instrument.gui.viewer.chart.ZeroCrossingErrorDetectorChart;
import io.github.dsheirer.message.Message;
import io.github.dsheirer.message.MessageDirection;
import io.github.dsheirer.module.decode.DecoderType;
import io.github.dsheirer.module.decode.ltrnet.DecodeConfigLTRNet;
import io.github.dsheirer.module.decode.ltrnet.LTRNetDecoderInstrumented;
import io.github.dsheirer.sample.Listener;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.layout.VBox;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class LTRNetPane extends RealDecoderPane
{
private final static Logger mLog = LoggerFactory.getLogger(LTRNetPane.class);
private HBox mSampleChartBox;
private RealSampleLineChart mRealSampleLineChart;
private HBox mSymbolDecoderBox;
private SampleBufferChart mSampleBufferChart;
private ZeroCrossingErrorDetectorChart mZeroCrossingErrorDetectorChart;
private LTRNetDecoderInstrumented mDecoder;
public LTRNetPane()
{
super(DecoderType.LTR_NET);
init();
}
private void init()
{
addListener(getDecoder());
addListener(getSampleLineChart());
HBox.setHgrow(getSampleChartBox(), Priority.ALWAYS);
HBox.setHgrow(getSymbolDecoderBox(), Priority.ALWAYS);
VBox.setVgrow(getSampleChartBox(), Priority.ALWAYS);
VBox.setVgrow(getSymbolDecoderBox(), Priority.ALWAYS);
getSampleChartBox().setMaxWidth(Double.MAX_VALUE);
getSymbolDecoderBox().setMaxWidth(Double.MAX_VALUE);
getChildren().addAll(getSampleChartBox(), getSymbolDecoderBox());
}
private LTRNetDecoderInstrumented getDecoder()
{
if(mDecoder == null)
{
DecodeConfigLTRNet config = new DecodeConfigLTRNet();
config.setMessageDirection(MessageDirection.OSW);
mDecoder = new LTRNetDecoderInstrumented(config, null);
mDecoder.setMessageListener(new Listener<Message>()
{
@Override
public void receive(Message message)
{
mLog.debug(message.getMessage());
}
});
}
return mDecoder;
}
private HBox getSampleChartBox()
{
if(mSampleChartBox == null)
{
mSampleChartBox = new HBox();
mSampleChartBox.setMaxHeight(Double.MAX_VALUE);
getSampleLineChart().setMaxWidth(Double.MAX_VALUE);
HBox.setHgrow(getSampleLineChart(), Priority.ALWAYS);
mSampleChartBox.getChildren().addAll(getSampleLineChart());
}
return mSampleChartBox;
}
private RealSampleLineChart getSampleLineChart()
{
if(mRealSampleLineChart == null)
{
mRealSampleLineChart = new RealSampleLineChart(500, (8000.0 / 300.0));
}
return mRealSampleLineChart;
}
private HBox getSymbolDecoderBox()
{
if(mSymbolDecoderBox == null)
{
mSymbolDecoderBox = new HBox();
mSymbolDecoderBox.setMaxWidth(Double.MAX_VALUE);
getSampleBufferChart().setMaxWidth(Double.MAX_VALUE);
HBox.setHgrow(getSampleBufferChart(), Priority.ALWAYS);
mSampleChartBox.getChildren().addAll(getSampleBufferChart(), getZeroCrossingErrorDetectorChart());
}
return mSymbolDecoderBox;
}
private SampleBufferChart getSampleBufferChart()
{
if(mSampleBufferChart == null)
{
mSampleBufferChart = new SampleBufferChart(getDecoder(), 106);
}
return mSampleBufferChart;
}
private ZeroCrossingErrorDetectorChart getZeroCrossingErrorDetectorChart()
{
if(mZeroCrossingErrorDetectorChart == null)
{
mZeroCrossingErrorDetectorChart = new ZeroCrossingErrorDetectorChart(getDecoder(),
getDecoder().getLTRDecoder().getErrorDetector().getBuffer().length);
}
return mZeroCrossingErrorDetectorChart;
}
}

2
src/main/java/io/github/dsheirer/instrument/gui/viewer/decoder/P25Phase1C4FMPane.java
View File

@@ -30,7 +30,7 @@ import javafx.scene.layout.Priority;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class P25Phase1C4FMPane extends DecoderPane
public class P25Phase1C4FMPane extends ComplexDecoderPane
{
private final static Logger mLog = LoggerFactory.getLogger(P25Phase1C4FMPane.class);

2
src/main/java/io/github/dsheirer/instrument/gui/viewer/decoder/P25Phase1LSMPane.java
View File

@@ -30,7 +30,7 @@ import javafx.scene.layout.Priority;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class P25Phase1LSMPane extends DecoderPane
public class P25Phase1LSMPane extends ComplexDecoderPane
{
private final static Logger mLog = LoggerFactory.getLogger(P25Phase1LSMPane.class);

68
src/main/java/io/github/dsheirer/instrument/gui/viewer/decoder/RealDecoderPane.java Normal file
View File

@@ -0,0 +1,68 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.instrument.gui.viewer.decoder;
import io.github.dsheirer.module.decode.DecoderType;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.SampleType;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.buffer.ReusableBufferBroadcaster;
import javafx.scene.text.Text;
public class RealDecoderPane extends AbstractDecoderPane<ReusableBuffer>
{
private ReusableBufferBroadcaster mBufferBroadcaster = new ReusableBufferBroadcaster();
private DecoderType mDecoderType;
public RealDecoderPane(DecoderType decoderType)
{
mDecoderType = decoderType;
}
/**
* Package private - used by factory class to create an empty pane
*/
RealDecoderPane()
{
getChildren().add(new Text("Please select a decoder from the menu"));
}
@Override
SampleType getSampleType()
{
return SampleType.COMPLEX;
}
@Override
public void receive(ReusableBuffer reusableBuffer)
{
mBufferBroadcaster.broadcast(reusableBuffer);
}
public void addListener(Listener<ReusableBuffer> listener)
{
mBufferBroadcaster.addListener(listener);
}
public void removeListener(Listener<ReusableBuffer> listener)
{
mBufferBroadcaster.removeListener(listener);
}
public void setSampleRate(double sampleRate)
{
}
}

52
src/main/java/io/github/dsheirer/instrument/tap/event/SyncDetectTap.java
View File

@@ -1,60 +1,58 @@
/*******************************************************************************
* SDR Trunk
* Copyright (C) 2014 Dennis Sheirer
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
******************************************************************************/
package io.github.dsheirer.instrument.tap.event;
import io.github.dsheirer.dsp.symbol.SyncDetectListener;
import io.github.dsheirer.dsp.symbol.ISyncDetectListener;
import io.github.dsheirer.dsp.symbol.SyncDetectProvider;
import io.github.dsheirer.instrument.tap.Tap;
import io.github.dsheirer.instrument.tap.TapListener;
import io.github.dsheirer.instrument.tap.TapType;
public class SyncDetectTap extends Tap
implements SyncDetectListener,
SyncDetectProvider
public class SyncDetectTap extends Tap implements ISyncDetectListener, SyncDetectProvider
{
private SyncDetectListener mListener;
private ISyncDetectListener mListener;
/**
* Sync detect event tap. Indicates when message sync word has been
* detected within a binary stream of data.
*/
public SyncDetectTap()
/**
* Sync detect event tap. Indicates when message sync word has been
* detected within a binary stream of data.
*/
public SyncDetectTap()
{
super( TapType.EVENT_SYNC_DETECT, "Sync Detected", 0 );
super(TapType.EVENT_SYNC_DETECT, "Sync Detected", 0);
}
@Override
@Override
public void syncDetected()
{
if( mListener != null )
{
mListener.syncDetected();
}
for( TapListener listener: mListeners )
{
listener.receive( getName() );
}
if(mListener != null)
{
mListener.syncDetected();
}
for(TapListener listener : mListeners)
{
listener.receive(getName());
}
}
@Override
public void setSyncDetectListener( SyncDetectListener listener )
@Override
public void setSyncDetectListener(ISyncDetectListener listener)
{
mListener = listener;
mListener = listener;
}
}

33
src/main/java/io/github/dsheirer/module/ProcessingChain.java
View File

@@ -49,8 +49,12 @@ import io.github.dsheirer.record.wave.ComplexBufferWaveRecorder;
import io.github.dsheirer.record.wave.RealBufferWaveRecorder;
import io.github.dsheirer.sample.Broadcaster;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.buffer.IReusableBufferListener;
import io.github.dsheirer.sample.buffer.IReusableBufferProvider;
import io.github.dsheirer.sample.buffer.IReusableComplexBufferListener;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.buffer.ReusableBufferBroadcaster;
import io.github.dsheirer.sample.buffer.ReusableComplexBuffer;
import io.github.dsheirer.sample.real.IFilteredRealBufferListener;
import io.github.dsheirer.sample.real.IFilteredRealBufferProvider;
import io.github.dsheirer.sample.real.IUnFilteredRealBufferListener;
@@ -98,7 +102,8 @@ public class ProcessingChain implements IChannelEventListener
private Broadcaster<AudioPacket> mAudioPacketBroadcaster = new Broadcaster<>();
private Broadcaster<CallEvent> mCallEventBroadcaster = new Broadcaster<>();
private Broadcaster<ChannelEvent> mChannelEventBroadcaster = new Broadcaster<>();
private ReusableBufferBroadcaster mComplexBufferBroadcaster = new ReusableBufferBroadcaster();
private ReusableBufferBroadcaster<ReusableComplexBuffer> mComplexBufferBroadcaster = new ReusableBufferBroadcaster();
private ReusableBufferBroadcaster<ReusableBuffer> mDemodulatedAudioBufferBroadcaster = new ReusableBufferBroadcaster();
private Broadcaster<DecoderStateEvent> mDecoderStateEventBroadcaster = new Broadcaster<>();
private Broadcaster<Heartbeat> mHeartbeatBroadcaster = new Broadcaster<>();
private Broadcaster<SourceEvent> mSourceEventBroadcaster = new Broadcaster<>();
@@ -327,9 +332,14 @@ public class ProcessingChain implements IChannelEventListener
mMessageBroadcaster.addListener(((IMessageListener) module).getMessageListener());
}
if(module instanceof IReusableBufferListener)
{
mDemodulatedAudioBufferBroadcaster.addListener(((IReusableBufferListener)module).getReusableBufferListener());
}
if(module instanceof IReusableComplexBufferListener)
{
mComplexBufferBroadcaster.addListener(((IReusableComplexBufferListener) module).getReusableComplexBufferListener());
mComplexBufferBroadcaster.addListener(((IReusableComplexBufferListener)module).getReusableComplexBufferListener());
}
if(module instanceof ISourceEventListener)
@@ -394,6 +404,11 @@ public class ProcessingChain implements IChannelEventListener
mHeartbeatBroadcaster.removeListener(((IHeartbeatListener)module).getHeartbeatListener());
}
if(module instanceof IReusableBufferListener)
{
mDemodulatedAudioBufferBroadcaster.removeListener(((IReusableBufferListener)module).getReusableBufferListener());
}
if(module instanceof IReusableComplexBufferListener)
{
mComplexBufferBroadcaster.removeListener(((IReusableComplexBufferListener) module).getReusableComplexBufferListener());
@@ -471,6 +486,11 @@ public class ProcessingChain implements IChannelEventListener
((IMessageProvider) module).setMessageListener(mMessageBroadcaster);
}
if(module instanceof IReusableBufferProvider)
{
((IReusableBufferProvider)module).setBufferListener(mDemodulatedAudioBufferBroadcaster);
}
if(module instanceof ISourceEventProvider)
{
((ISourceEventProvider) module).setSourceEventListener(mSourceEventBroadcaster);
@@ -538,6 +558,11 @@ public class ProcessingChain implements IChannelEventListener
((IMessageProvider) module).setMessageListener(null);
}
if(module instanceof IReusableBufferProvider)
{
((IReusableBufferProvider)module).setBufferListener(null);
}
if(module instanceof ISourceEventProvider)
{
((ISourceEventProvider) module).setSourceEventListener(null);
@@ -588,7 +613,7 @@ public class ProcessingChain implements IChannelEventListener
((ComplexSource) mSource).setListener(mComplexBufferBroadcaster);
break;
case REAL:
((RealSource) mSource).setListener(mFilteredRealBufferBroadcaster);
((RealSource) mSource).setListener(mDemodulatedAudioBufferBroadcaster);
break;
default:
throw new IllegalArgumentException("Unrecognized source "
@@ -636,7 +661,7 @@ public class ProcessingChain implements IChannelEventListener
((ComplexSource) mSource).removeListener(mComplexBufferBroadcaster);
break;
case REAL:
((RealSource) mSource).removeListener(mFilteredRealBufferBroadcaster);
((RealSource) mSource).removeListener(mDemodulatedAudioBufferBroadcaster);
break;
default:
throw new IllegalArgumentException("Unrecognized source sample type - cannot start processing " +

67
src/main/java/io/github/dsheirer/module/decode/DecoderFactory.java
View File

@@ -20,7 +20,7 @@ package io.github.dsheirer.module.decode;
import io.github.dsheirer.alias.AliasList;
import io.github.dsheirer.alias.AliasModel;
import io.github.dsheirer.audio.AudioModule2;
import io.github.dsheirer.audio.AudioModule;
import io.github.dsheirer.channel.metadata.Metadata;
import io.github.dsheirer.channel.state.AlwaysUnsquelchedDecoderState;
import io.github.dsheirer.channel.traffic.TrafficChannelManager;
@@ -30,8 +30,6 @@ import io.github.dsheirer.controller.channel.ChannelModel;
import io.github.dsheirer.controller.channel.ChannelProcessingManager;
import io.github.dsheirer.controller.channel.map.ChannelMap;
import io.github.dsheirer.controller.channel.map.ChannelMapModel;
import io.github.dsheirer.dsp.filter.FilterFactory;
import io.github.dsheirer.dsp.filter.fir.FIRFilterSpecification;
import io.github.dsheirer.filter.AllPassFilter;
import io.github.dsheirer.filter.FilterSet;
import io.github.dsheirer.filter.IFilter;
@@ -101,39 +99,8 @@ public class DecoderFactory
{
private final static Logger mLog = LoggerFactory.getLogger(DecoderFactory.class);
private static final int NBFM_PASS_FREQUENCY = 6000;
private static final int NBFM_STOP_FREQUENCY = 6500;
//Low-pass filter with ~60 dB attenuation and 89 taps
private static final FIRFilterSpecification MPT1327_FILTER_SPECIFICATION = FIRFilterSpecification.lowPassBuilder()
.sampleRate( 48000 ).gridDensity( 16 ).passBandCutoff( 3200 ).passBandAmplitude( 1.0 ).passBandRipple( 0.02 )
.stopBandStart( 4000 ).stopBandAmplitude( 0.0 ).stopBandRipple( 0.03 ).build();
private static final FIRFilterSpecification P25_C4FM_IQ_SPECIFICATION = FIRFilterSpecification.lowPassBuilder()
.sampleRate(48000).gridDensity(16).passBandCutoff(6750).passBandAmplitude(1.0).passBandRipple(0.01)
.stopBandStart(7000).stopBandAmplitude(0.0).stopBandRipple(0.008).build();
private static final FIRFilterSpecification P25_C4FM_DEMOD_SPECIFICATION = FIRFilterSpecification.lowPassBuilder()
.sampleRate(48000).gridDensity(16).passBandCutoff(2500).passBandAmplitude(1.0).passBandRipple(0.01)
.stopBandStart(4000).stopBandAmplitude(0.0).stopBandRipple(0.008).build();
private static float[] MPT1327_LOWPASS_FILTER;
private static float[] P25_C4FM_IQ_FILTER;
private static float[] P25_C4FM_DEMOD_FILTER;
static
{
try
{
MPT1327_LOWPASS_FILTER = FilterFactory.getTaps(MPT1327_FILTER_SPECIFICATION);
P25_C4FM_IQ_FILTER = FilterFactory.getTaps(P25_C4FM_IQ_SPECIFICATION);
P25_C4FM_DEMOD_FILTER = FilterFactory.getTaps(P25_C4FM_DEMOD_SPECIFICATION);
}
catch(Exception e)
{
mLog.error("Couldn't design startup filter(s)");
}
}
private static final double CHANNEL_BANDWIDTH = 12500.0;
private static final double DEMODULATED_AUDIO_SAMPLE_RATE = 8000.0;
/**
* Returns a list of one primary decoder and any auxiliary decoders, as
@@ -183,30 +150,28 @@ public class DecoderFactory
modules.add(new AMDecoder(decodeConfig));
modules.add(new AlwaysUnsquelchedDecoderState(DecoderType.AM, channel.getName()));
modules.add(new AMDemodulatorModule());
//TODO: update AM demodulator to produce demodulated 8 kHz audio and delete the following filter module
modules.add(new DemodulatedAudioFilterModule(4000, 6000));
modules.add(new AudioModule2(metadata));
modules.add(new AudioModule(metadata));
break;
case NBFM:
modules.add(new NBFMDecoder(decodeConfig));
modules.add(new AlwaysUnsquelchedDecoderState(DecoderType.NBFM, channel.getName()));
modules.add(new FMDemodulatorModule(NBFM_PASS_FREQUENCY, NBFM_STOP_FREQUENCY));
modules.add(new DemodulatedAudioFilterModule(4000, 6000));
modules.add(new AudioModule2(metadata));
modules.add(new FMDemodulatorModule(CHANNEL_BANDWIDTH, DEMODULATED_AUDIO_SAMPLE_RATE));
modules.add(new AudioModule(metadata));
break;
case LTR_STANDARD:
MessageDirection direction = ((DecodeConfigLTRStandard) decodeConfig).getMessageDirection();
modules.add(new LTRStandardDecoder(aliasList, direction));
modules.add(new LTRStandardDecoderState(aliasList));
modules.add(new FMDemodulatorModule(NBFM_PASS_FREQUENCY, NBFM_STOP_FREQUENCY));
modules.add(new DemodulatedAudioFilterModule(4000, 6000));
modules.add(new AudioModule2(metadata));
modules.add(new FMDemodulatorModule(CHANNEL_BANDWIDTH, DEMODULATED_AUDIO_SAMPLE_RATE));
modules.add(new AudioModule(metadata));
break;
case LTR_NET:
modules.add(new LTRNetDecoder((DecodeConfigLTRNet) decodeConfig, aliasList));
modules.add(new LTRNetDecoderState(aliasList));
modules.add(new FMDemodulatorModule(NBFM_PASS_FREQUENCY, NBFM_STOP_FREQUENCY));
modules.add(new DemodulatedAudioFilterModule(4000, 6000));
modules.add(new AudioModule2(metadata));
modules.add(new FMDemodulatorModule(CHANNEL_BANDWIDTH, DEMODULATED_AUDIO_SAMPLE_RATE));
modules.add(new AudioModule(metadata));
break;
case MPT1327:
DecodeConfigMPT1327 mptConfig = (DecodeConfigMPT1327) decodeConfig;
@@ -227,16 +192,14 @@ public class DecoderFactory
(aliasList != null ? aliasList.getName() : null), mptConfig.getTrafficChannelPoolSize()));
}
modules.add(new FMDemodulatorModule(NBFM_PASS_FREQUENCY, NBFM_STOP_FREQUENCY));
modules.add(new DemodulatedAudioFilterModule(P25_C4FM_DEMOD_FILTER, 1.0f));
modules.add(new AudioModule2(metadata));
modules.add(new FMDemodulatorModule(CHANNEL_BANDWIDTH, DEMODULATED_AUDIO_SAMPLE_RATE));
modules.add(new AudioModule(metadata));
break;
case PASSPORT:
modules.add(new PassportDecoder(decodeConfig, aliasList));
modules.add(new PassportDecoderState(aliasList));
modules.add(new FMDemodulatorModule(NBFM_PASS_FREQUENCY, NBFM_STOP_FREQUENCY));
modules.add(new DemodulatedAudioFilterModule(4000, 6000));
modules.add(new AudioModule2(metadata));
modules.add(new FMDemodulatorModule(CHANNEL_BANDWIDTH, DEMODULATED_AUDIO_SAMPLE_RATE));
modules.add(new AudioModule(metadata));
break;
case P25_PHASE1:
DecodeConfigP25Phase1 p25Config = (DecodeConfigP25Phase1) decodeConfig;

147
src/main/java/io/github/dsheirer/module/decode/ltrnet/LTRNetDecoder.java
View File

@@ -1,121 +1,92 @@
/*******************************************************************************
* SDR Trunk
* Copyright (C) 2014 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.module.decode.ltrnet;
import io.github.dsheirer.alias.AliasList;
import io.github.dsheirer.bits.MessageFramer;
import io.github.dsheirer.bits.SyncPattern;
import io.github.dsheirer.dsp.fsk.LTRFSKDecoder;
import io.github.dsheirer.instrument.Instrumentable;
import io.github.dsheirer.instrument.tap.Tap;
import io.github.dsheirer.instrument.tap.TapGroup;
import io.github.dsheirer.dsp.fsk.LTRDecoder;
import io.github.dsheirer.message.MessageDirection;
import io.github.dsheirer.module.decode.Decoder;
import io.github.dsheirer.module.decode.DecoderType;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.real.IUnFilteredRealBufferListener;
import io.github.dsheirer.sample.real.RealBuffer;
import io.github.dsheirer.sample.buffer.IReusableBufferListener;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import java.util.ArrayList;
import java.util.List;
public class LTRNetDecoder extends Decoder
implements IUnFilteredRealBufferListener, Instrumentable
public class LTRNetDecoder extends Decoder implements IReusableBufferListener, Listener<ReusableBuffer>
{
public static final int LTR_STANDARD_MESSAGE_LENGTH = 40;
private LTRFSKDecoder mLTRFSKDecoder;
private MessageFramer mLTRMessageFramer;
private LTRNetMessageProcessor mLTRMessageProcessor;
public static final int LTR_NET_MESSAGE_LENGTH = 40;
protected LTRDecoder mLTRDecoder;
private MessageFramer mLTRMessageFramer;
private LTRNetMessageProcessor mLTRMessageProcessor;
private List<TapGroup> mAvailableTaps;
/**
* LTR-Net Decoder. Decodes unfiltered (e.g. demodulated but with no DC or
* audio filtering) samples and produces LTR-Net messages.
*/
public LTRNetDecoder( DecodeConfigLTRNet config, AliasList aliasList )
{
mLTRFSKDecoder = new LTRFSKDecoder();
if( config.getMessageDirection() == MessageDirection.OSW )
{
mLTRMessageFramer =
new MessageFramer( SyncPattern.LTR_STANDARD_OSW.getPattern(),
LTR_STANDARD_MESSAGE_LENGTH );
}
else
{
mLTRMessageFramer =
new MessageFramer( SyncPattern.LTR_STANDARD_ISW.getPattern(),
LTR_STANDARD_MESSAGE_LENGTH );
}
mLTRFSKDecoder.addListener( mLTRMessageFramer );
mLTRMessageProcessor = new LTRNetMessageProcessor(
config.getMessageDirection(), aliasList );
mLTRMessageFramer.addMessageListener( mLTRMessageProcessor );
mLTRMessageProcessor.setMessageListener( getMessageListener() );
}
@Override
public DecoderType getDecoderType()
{
return DecoderType.LTR_NET;
}
@Override
public Listener<RealBuffer> getUnFilteredRealBufferListener()
{
return mLTRFSKDecoder;
}
@Override
public List<TapGroup> getTapGroups()
public LTRNetDecoder(DecodeConfigLTRNet config, AliasList aliasList, LTRDecoder ltrDecoder)
{
if( mAvailableTaps == null )
mLTRDecoder = ltrDecoder;
if(config.getMessageDirection() == MessageDirection.OSW)
{
mAvailableTaps = new ArrayList<TapGroup>();
mAvailableTaps.addAll( mLTRFSKDecoder.getTapGroups() );
mLTRMessageFramer = new MessageFramer(SyncPattern.LTR_STANDARD_OSW.getPattern(), LTR_NET_MESSAGE_LENGTH);
}
else
{
mLTRMessageFramer = new MessageFramer(SyncPattern.LTR_STANDARD_ISW.getPattern(), LTR_NET_MESSAGE_LENGTH);
}
return mAvailableTaps;
mLTRDecoder.setListener(mLTRMessageFramer);
mLTRMessageFramer.setSyncDetectListener(mLTRDecoder);
mLTRMessageProcessor = new LTRNetMessageProcessor(config.getMessageDirection(), aliasList);
mLTRMessageFramer.addMessageListener(mLTRMessageProcessor);
mLTRMessageProcessor.setMessageListener(getMessageListener());
}
/**
* LTR-Net Decoder. Decodes unfiltered (e.g. demodulated but with no DC or
* audio filtering) samples and produces LTR-Net messages.
*/
public LTRNetDecoder(DecodeConfigLTRNet config, AliasList aliasList)
{
this(config, aliasList, new LTRDecoder(LTR_NET_MESSAGE_LENGTH));
}
@Override
public void registerTap( Tap tap )
public DecoderType getDecoderType()
{
mLTRFSKDecoder.registerTap( tap );
return DecoderType.LTR_NET;
}
@Override
public void unregisterTap( Tap tap )
public Listener<ReusableBuffer> getReusableBufferListener()
{
mLTRFSKDecoder.unregisterTap( tap );
return mLTRDecoder;
}
@Override
public void reset()
{
mLTRMessageFramer.reset();
}
@Override
public void receive(ReusableBuffer reusableBuffer)
{
mLTRDecoder.receive(reusableBuffer);
}
@Override
public void reset()
{
mLTRMessageFramer.reset();
}
}

44
src/main/java/io/github/dsheirer/module/decode/ltrnet/LTRNetDecoderInstrumented.java Normal file
View File

@@ -0,0 +1,44 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.module.decode.ltrnet;
import io.github.dsheirer.alias.AliasList;
import io.github.dsheirer.dsp.fsk.LTRDecoderInstrumented;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import javafx.beans.property.SimpleIntegerProperty;
public class LTRNetDecoderInstrumented extends LTRNetDecoder
{
public SimpleIntegerProperty bufferCount = new SimpleIntegerProperty();
public LTRNetDecoderInstrumented(DecodeConfigLTRNet config, AliasList aliasList)
{
super(config, aliasList, new LTRDecoderInstrumented(LTR_NET_MESSAGE_LENGTH));
}
public LTRDecoderInstrumented getLTRDecoder()
{
return (LTRDecoderInstrumented)mLTRDecoder;
}
@Override
public void receive(ReusableBuffer reusableBuffer)
{
super.receive(reusableBuffer);
bufferCount.setValue(bufferCount.intValue() + 1);
}
}

121
src/main/java/io/github/dsheirer/module/decode/ltrstandard/LTRStandardDecoder.java
View File

@@ -1,85 +1,84 @@
/*******************************************************************************
* SDR Trunk
* Copyright (C) 2014,2015 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.module.decode.ltrstandard;
import io.github.dsheirer.alias.AliasList;
import io.github.dsheirer.bits.MessageFramer;
import io.github.dsheirer.bits.SyncPattern;
import io.github.dsheirer.dsp.fsk.LTRFSKDecoder;
import io.github.dsheirer.dsp.fsk.LTRDecoder;
import io.github.dsheirer.message.MessageDirection;
import io.github.dsheirer.module.decode.Decoder;
import io.github.dsheirer.module.decode.DecoderType;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.real.IUnFilteredRealBufferListener;
import io.github.dsheirer.sample.real.RealBuffer;
import io.github.dsheirer.sample.buffer.IReusableBufferListener;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
public class LTRStandardDecoder extends Decoder implements IUnFilteredRealBufferListener
public class LTRStandardDecoder extends Decoder implements IReusableBufferListener, Listener<ReusableBuffer>
{
public static final int LTR_STANDARD_MESSAGE_LENGTH = 40;
public static final int LTR_STANDARD_MESSAGE_LENGTH = 40;
private LTRDecoder mLTRDecoder;
private MessageFramer mLTRMessageFramer;
private LTRStandardMessageProcessor mLTRMessageProcessor;
private LTRFSKDecoder mLTRFSKDecoder;
private MessageFramer mLTRMessageFramer;
private LTRStandardMessageProcessor mLTRMessageProcessor;
/**
* LTR Decoder. Decodes unfiltered (e.g. demodulated but with no DC or
* audio filtering) samples and produces LTR Standard messages.
*/
public LTRStandardDecoder( AliasList aliasList,
MessageDirection direction )
{
mLTRFSKDecoder = new LTRFSKDecoder();
public LTRStandardDecoder(AliasList aliasList, MessageDirection direction)
{
mLTRDecoder = new LTRDecoder(LTR_STANDARD_MESSAGE_LENGTH);
if( direction == MessageDirection.OSW )
{
mLTRMessageFramer =
new MessageFramer( SyncPattern.LTR_STANDARD_OSW.getPattern(),
LTR_STANDARD_MESSAGE_LENGTH );
}
else
{
mLTRMessageFramer =
new MessageFramer( SyncPattern.LTR_STANDARD_ISW.getPattern(),
LTR_STANDARD_MESSAGE_LENGTH );
}
mLTRFSKDecoder.addListener( mLTRMessageFramer );
if(direction == MessageDirection.OSW)
{
mLTRMessageFramer = new MessageFramer(SyncPattern.LTR_STANDARD_OSW.getPattern(), LTR_STANDARD_MESSAGE_LENGTH);
}
else
{
mLTRMessageFramer = new MessageFramer(SyncPattern.LTR_STANDARD_ISW.getPattern(), LTR_STANDARD_MESSAGE_LENGTH);
}
mLTRMessageProcessor = new LTRStandardMessageProcessor( direction, aliasList );
mLTRMessageFramer.addMessageListener( mLTRMessageProcessor );
mLTRMessageProcessor.setMessageListener( getMessageListener() );
}
mLTRDecoder.setListener(mLTRMessageFramer);
mLTRMessageFramer.setSyncDetectListener(mLTRDecoder);
mLTRMessageProcessor = new LTRStandardMessageProcessor(direction, aliasList);
mLTRMessageFramer.addMessageListener(mLTRMessageProcessor);
mLTRMessageProcessor.setMessageListener(getMessageListener());
}
@Override
public DecoderType getDecoderType()
{
return DecoderType.LTR_STANDARD;
}
@Override
public DecoderType getDecoderType()
{
return DecoderType.LTR_STANDARD;
}
@Override
public Listener<RealBuffer> getUnFilteredRealBufferListener()
{
return mLTRFSKDecoder;
}
@Override
public Listener<ReusableBuffer> getReusableBufferListener()
{
return mLTRDecoder;
}
@Override
public void reset()
{
mLTRMessageFramer.reset();
}
@Override
public void receive(ReusableBuffer reusableBuffer)
{
mLTRDecoder.receive(reusableBuffer);
}
@Override
public void reset()
{
mLTRMessageFramer.reset();
}
}

2
src/main/java/io/github/dsheirer/module/decode/p25/P25MessageFramer.java
View File

@@ -3,13 +3,13 @@ package io.github.dsheirer.module.decode.p25;
import io.github.dsheirer.alias.AliasList;
import io.github.dsheirer.bits.BinaryMessage;
import io.github.dsheirer.bits.BitSetFullException;
import io.github.dsheirer.bits.ISyncDetectListener;
import io.github.dsheirer.bits.MultiSyncPatternMatcher;
import io.github.dsheirer.bits.SoftSyncDetector;
import io.github.dsheirer.bits.SyncDetector;
import io.github.dsheirer.dsp.psk.pll.IPhaseLockedLoop;
import io.github.dsheirer.dsp.symbol.Dibit;
import io.github.dsheirer.dsp.symbol.FrameSync;
import io.github.dsheirer.dsp.symbol.ISyncDetectListener;
import io.github.dsheirer.edac.BCH_63_16_11;
import io.github.dsheirer.edac.CRC;
import io.github.dsheirer.edac.CRCP25;

6
src/main/java/io/github/dsheirer/module/decode/passport/PassportDecoder.java
View File

@@ -20,7 +20,7 @@ package io.github.dsheirer.module.decode.passport;
import io.github.dsheirer.alias.AliasList;
import io.github.dsheirer.bits.MessageFramer;
import io.github.dsheirer.bits.SyncPattern;
import io.github.dsheirer.dsp.fsk.LTRFSKDecoder;
import io.github.dsheirer.dsp.fsk.LTRFSKDecoderLegacy;
import io.github.dsheirer.instrument.Instrumentable;
import io.github.dsheirer.instrument.tap.Tap;
import io.github.dsheirer.instrument.tap.TapGroup;
@@ -40,7 +40,7 @@ public class PassportDecoder extends Decoder
public static final int PASSPORT_MESSAGE_LENGTH = 68;
public static final int PASSPORT_SYNC_LENGTH = 9;
private LTRFSKDecoder mPassportFSKDecoder;
private LTRFSKDecoderLegacy mPassportFSKDecoder;
private MessageFramer mPassportMessageFramer;
private PassportMessageProcessor mPassportMessageProcessor;
@@ -52,7 +52,7 @@ public class PassportDecoder extends Decoder
*/
public PassportDecoder(DecodeConfiguration config, AliasList aliasList )
{
mPassportFSKDecoder = new LTRFSKDecoder();
mPassportFSKDecoder = new LTRFSKDecoderLegacy();
mPassportMessageFramer =
new MessageFramer( SyncPattern.PASSPORT.getPattern(),

1
src/main/java/io/github/dsheirer/module/demodulate/audio/DemodulatedAudioFilterModule.java
View File

@@ -30,6 +30,7 @@ import io.github.dsheirer.sample.real.RealBuffer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Deprecated //Remove once polyphase channelizer enhancement is complete
public class DemodulatedAudioFilterModule extends Module implements IUnFilteredRealBufferListener, IFilteredRealBufferProvider
{
private final static Logger mLog = LoggerFactory.getLogger(DemodulatedAudioFilterModule.class);

150
src/main/java/io/github/dsheirer/module/demodulate/fm/FMDemodulatorModule.java
View File

@@ -19,50 +19,55 @@ import io.github.dsheirer.dsp.filter.FilterFactory;
import io.github.dsheirer.dsp.filter.Window;
import io.github.dsheirer.dsp.filter.design.FilterDesignException;
import io.github.dsheirer.dsp.filter.fir.FIRFilterSpecification;
import io.github.dsheirer.dsp.filter.fir.complex.ComplexFIRFilter_CB_CB;
import io.github.dsheirer.dsp.fm.FMDemodulator_CB;
import io.github.dsheirer.dsp.filter.fir.complex.ComplexFIRFilter2;
import io.github.dsheirer.dsp.filter.resample.RealResampler;
import io.github.dsheirer.dsp.fm.FMDemodulator;
import io.github.dsheirer.module.Module;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.buffer.IReusableBufferProvider;
import io.github.dsheirer.sample.buffer.IReusableComplexBufferListener;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.buffer.ReusableComplexBuffer;
import io.github.dsheirer.sample.real.IUnFilteredRealBufferProvider;
import io.github.dsheirer.sample.real.RealBuffer;
import io.github.dsheirer.source.ISourceEventListener;
import io.github.dsheirer.source.SourceEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* FM Demodulator with integrated fractional resampler.
*
* Note: no filtering is applied to the demodulated audio.
*/
public class FMDemodulatorModule extends Module implements ISourceEventListener, IReusableComplexBufferListener,
IUnFilteredRealBufferProvider
Listener<ReusableComplexBuffer>, IReusableBufferProvider
{
private final static Logger mLog = LoggerFactory.getLogger(FMDemodulatorModule.class);
private ComplexFIRFilter_CB_CB mIQFilter;
private FMDemodulator_CB mDemodulator;
private ReusableBufferProcessor mReusableBufferProcessor = new ReusableBufferProcessor();
private ComplexFIRFilter2 mIQFilter;
private FMDemodulator mDemodulator = new FMDemodulator();
private RealResampler mResampler;
private SourceEventProcessor mSourceEventProcessor = new SourceEventProcessor();
private int mPassFrequency;
private int mStopFrequency;
private Listener<ReusableBuffer> mResampledReusableBufferListener;
private double mChannelBandwidth;
private double mOutputSampleRate;
/**
* FM Demodulator with I/Q filter. Demodulated output is unfiltered and may contain a DC component.
* Creates an FM demodulator for the specified channel bandwidth and output sample rate.
*
* @param pass - pass frequency for IQ filtering prior to demodulation. This
* frequency should be less than or equal to half of the signal bandwidth since the filter will
* be applied against each of the inphase and quadrature signals and the
* combined pass bandwidth will be twice this value.
* A baseband I/Q filter will be constructed to low pass filter the incoming sample buffer stream to the desired
* channel bandwidth and the demodulated output will be resampled to the desired output sample rate. The input
* low pass filter is constructed at runtime based on receiving a sample rate notification source event.
*/
public FMDemodulatorModule(int pass, int stop)
public FMDemodulatorModule(double channelBandwidth, double outputSampleRate)
{
mDemodulator = new FMDemodulator_CB(1.0f);
mPassFrequency = pass;
mStopFrequency = stop;
mChannelBandwidth = channelBandwidth;
mOutputSampleRate = outputSampleRate;
}
@Override
public Listener<ReusableComplexBuffer> getReusableComplexBufferListener()
{
return mReusableBufferProcessor;
return this;
}
@Override
@@ -90,18 +95,6 @@ public class FMDemodulatorModule extends Module implements ISourceEventListener,
mDemodulator.reset();
}
@Override
public void setUnFilteredRealBufferListener(Listener<RealBuffer> listener)
{
mDemodulator.setListener(listener);
}
@Override
public void removeUnFilteredRealBufferListener()
{
mDemodulator.removeListener();
}
@Override
public void start()
{
@@ -112,27 +105,38 @@ public class FMDemodulatorModule extends Module implements ISourceEventListener,
{
}
/**
* Receives complex buffers and sends them through the filtering and demodulation process. Manages accounting for
* the reusable buffers.
*/
public class ReusableBufferProcessor implements Listener<ReusableComplexBuffer>
@Override
public void setBufferListener(Listener<ReusableBuffer> listener)
{
@Override
public void receive(ReusableComplexBuffer reusableComplexBuffer)
mResampledReusableBufferListener = listener;
}
@Override
public void removeBufferListener()
{
mResampledReusableBufferListener = null;
}
@Override
public void receive(ReusableComplexBuffer reusableComplexBuffer)
{
if(mIQFilter == null)
{
if(mIQFilter == null)
{
reusableComplexBuffer.decrementUserCount();
throw new IllegalStateException("FM demodulator module must receive a sample rate change source " +
"event before it can process complex sample buffers");
}
float[] samples = reusableComplexBuffer.getSamplesCopy();
mIQFilter.receive(samples);
reusableComplexBuffer.decrementUserCount();
throw new IllegalStateException("FM demodulator module must receive a sample rate change source " +
"event before it can process complex sample buffers");
}
ReusableComplexBuffer basebandFilteredBuffer = mIQFilter.filter(reusableComplexBuffer);
ReusableBuffer demodulatedBuffer = mDemodulator.demodulate(basebandFilteredBuffer);
if(mResampler != null)
{
mResampler.resample(demodulatedBuffer);
}
else
{
demodulatedBuffer.decrementUserCount();
}
}
@@ -146,18 +150,35 @@ public class FMDemodulatorModule extends Module implements ISourceEventListener,
{
if(sourceEvent.getEvent() == SourceEvent.Event.NOTIFICATION_SAMPLE_RATE_CHANGE)
{
if(mIQFilter != null)
{
mIQFilter.dispose();
mIQFilter = null;
}
double sampleRate = sourceEvent.getValue().doubleValue();
if((sampleRate < (2.0 * mChannelBandwidth)))
{
throw new IllegalStateException("FM Demodulator with channel bandwidth [" + mChannelBandwidth +
"] requires a channel sample rate of [" + (2.0 * mChannelBandwidth + "] - sample rate of [" +
sampleRate + "] is not supported"));
}
double cutoff = sampleRate / 4.0;
int passBandStop = (int)cutoff - 500;
int stopBandStart = (int)cutoff + 500;
float[] filterTaps = null;
FIRFilterSpecification specification = FIRFilterSpecification.lowPassBuilder()
.sampleRate(sampleRate)
.gridDensity(16)
.oddLength(true)
.passBandCutoff(mPassFrequency)
.passBandCutoff(passBandStop)
.passBandAmplitude(1.0)
.passBandRipple(0.01)
.stopBandStart(mStopFrequency)
.stopBandStart(stopBandStart)
.stopBandAmplitude(0.0)
.stopBandRipple(0.028) //Approximately 60 dB attenuation
.build();
@@ -169,18 +190,35 @@ public class FMDemodulatorModule extends Module implements ISourceEventListener,
catch(FilterDesignException fde)
{
mLog.error("Couldn't design FM demodulator remez filter for sample rate [" + sampleRate +
"] pass frequency [" + mPassFrequency + "] and stop frequency [" + mStopFrequency +
"] pass frequency [" + passBandStop + "] and stop frequency [" + stopBandStart +
"] - using sinc filter");
}
if(filterTaps == null)
{
filterTaps = FilterFactory.getLowPass(sampleRate, mPassFrequency, mStopFrequency, 60,
filterTaps = FilterFactory.getLowPass(sampleRate, passBandStop, stopBandStart, 60,
Window.WindowType.HAMMING, true);
}
mIQFilter = new ComplexFIRFilter_CB_CB(filterTaps, 1.0f);
mIQFilter.setListener(mDemodulator);
mIQFilter = new ComplexFIRFilter2(filterTaps);
mResampler = new RealResampler(sampleRate, mOutputSampleRate);
mResampler.setListener(new Listener<ReusableBuffer>()
{
@Override
public void receive(ReusableBuffer reusableBuffer)
{
if(mResampledReusableBufferListener != null)
{
mResampledReusableBufferListener.receive(reusableBuffer);
}
else
{
reusableBuffer.decrementUserCount();
}
}
});
}
}
}

23
src/main/java/io/github/dsheirer/sample/buffer/IReusableBufferListener.java Normal file
View File

@@ -0,0 +1,23 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.sample.buffer;
import io.github.dsheirer.sample.Listener;
public interface IReusableBufferListener
{
Listener<ReusableBuffer> getReusableBufferListener();
}

11
src/main/java/io/github/dsheirer/sample/buffer/IReusableBufferProvider.java
View File

@@ -17,20 +17,15 @@ package io.github.dsheirer.sample.buffer;
import io.github.dsheirer.sample.Listener;
public interface IReusableBufferProvider<T extends ReusableBuffer>
public interface IReusableBufferProvider
{
/**
* Adds the listener to receive complex buffer samples
*/
void addBufferListener(Listener<T> listener);
void setBufferListener(Listener<ReusableBuffer> listener);
/**
* Removes the listener from receiving complex buffer samples
*/
void removeBufferListener(Listener<T> listener);
/**
* Indicates if there are any complex buffer listeners registered
*/
boolean hasBufferListeners();
void removeBufferListener();
}

4
src/main/java/io/github/dsheirer/sample/buffer/IReusableComplexBufferListener.java
View File

@@ -17,7 +17,7 @@ package io.github.dsheirer.sample.buffer;
import io.github.dsheirer.sample.Listener;
public interface IReusableComplexBufferListener<T extends ReusableBuffer>
public interface IReusableComplexBufferListener<ReusableComplexBuffer>
{
Listener<T> getReusableComplexBufferListener();
Listener<ReusableComplexBuffer> getReusableComplexBufferListener();
}

36
src/main/java/io/github/dsheirer/sample/buffer/IReusableComplexBufferProvider.java Normal file
View File

@@ -0,0 +1,36 @@
/*******************************************************************************
* sdr-trunk
* Copyright (C) 2014-2018 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>
*
******************************************************************************/
package io.github.dsheirer.sample.buffer;
import io.github.dsheirer.sample.Listener;
public interface IReusableComplexBufferProvider
{
/**
* Adds the listener to receive complex buffer samples
*/
void addBufferListener(Listener<ReusableComplexBuffer> listener);
/**
* Removes the listener from receiving complex buffer samples
*/
void removeBufferListener(Listener<ReusableComplexBuffer> listener);
/**
* Indicates if there are any complex buffer listeners registered
*/
boolean hasBufferListeners();
}

12
src/main/java/io/github/dsheirer/sample/buffer/ReusableBufferBroadcaster.java
View File

@@ -20,7 +20,7 @@ import io.github.dsheirer.sample.Listener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ReusableBufferBroadcaster extends Broadcaster<ReusableComplexBuffer>
public class ReusableBufferBroadcaster<T extends ReusableBuffer> extends Broadcaster<T>
{
private final static Logger mLog = LoggerFactory.getLogger(ReusableBufferBroadcaster.class);
@@ -34,15 +34,15 @@ public class ReusableBufferBroadcaster extends Broadcaster<ReusableComplexBuffer
* send the buffer to all consumers.
*/
@Override
public void broadcast(ReusableComplexBuffer reusableComplexBuffer)
public void broadcast(T reusableBuffer)
{
for(Listener<ReusableComplexBuffer> listener : mListeners)
for(Listener<T> listener : mListeners)
{
reusableComplexBuffer.incrementUserCount();
listener.receive(reusableComplexBuffer);
reusableBuffer.incrementUserCount();
listener.receive(reusableBuffer);
}
//Decrement user counter for this broadcaster
reusableComplexBuffer.decrementUserCount();
reusableBuffer.decrementUserCount();
}
}

4
src/main/java/io/github/dsheirer/sample/buffer/ReusableBufferQueue.java
View File

@@ -27,10 +27,6 @@ public class ReusableBufferQueue extends AbstractReusableBufferQueue<ReusableBuf
super(debugName);
}
public ReusableBufferQueue()
{
}
/**
* Returns a reusable buffer from an internal recycling queue, or creates a new buffer if there are currently no
* buffers available for reuse.

4
src/main/java/io/github/dsheirer/source/RealSource.java
View File

@@ -2,10 +2,10 @@ package io.github.dsheirer.source;
import io.github.dsheirer.sample.Provider;
import io.github.dsheirer.sample.SampleType;
import io.github.dsheirer.sample.real.RealBuffer;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
public abstract class RealSource extends Source implements Provider<RealBuffer>
public abstract class RealSource extends Source implements Provider<ReusableBuffer>
{
@Override
public SampleType getSampleType()

47
src/main/java/io/github/dsheirer/source/mixer/RealMixerSource.java
View File

@@ -19,6 +19,9 @@ package io.github.dsheirer.source.mixer;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.adapter.ISampleAdapter;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.buffer.ReusableBufferBroadcaster;
import io.github.dsheirer.sample.buffer.ReusableBufferQueue;
import io.github.dsheirer.sample.real.RealBuffer;
import io.github.dsheirer.source.RealSource;
import io.github.dsheirer.source.SourceEvent;
@@ -29,14 +32,14 @@ import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.TargetDataLine;
import java.util.Iterator;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.atomic.AtomicBoolean;
public class RealMixerSource extends RealSource
{
private final static Logger mLog = LoggerFactory.getLogger(RealMixerSource.class);
private ReusableBufferBroadcaster<ReusableBuffer> mBufferBroadcaster = new ReusableBufferBroadcaster<>();
private ReusableBufferQueue mReusableBufferQueue = new ReusableBufferQueue("RealMixerSource");
private long mFrequency = 0;
private int mBufferSize = 16384;
@@ -103,9 +106,9 @@ public class RealMixerSource extends RealSource
{
}
public void setListener(Listener<RealBuffer> listener)
public void setListener(Listener<ReusableBuffer> listener)
{
mSampleListeners.add(listener);
mBufferBroadcaster.addListener(listener);
/* If this is the first listener, start the reader thread */
if(!mBufferReader.isRunning())
@@ -117,38 +120,17 @@ public class RealMixerSource extends RealSource
}
}
public void removeListener(Listener<RealBuffer> listener)
public void removeListener(Listener<ReusableBuffer> listener)
{
mSampleListeners.remove(listener);
mBufferBroadcaster.removeListener(listener);
/* If this is the laster listener, stop the reader thread */
/* If this is the last listener, stop the reader thread */
if(mSampleListeners.isEmpty())
{
mBufferReader.stop();
}
}
public void broadcast(RealBuffer samples)
{
Iterator<Listener<RealBuffer>> it = mSampleListeners.iterator();
while(it.hasNext())
{
Listener<RealBuffer> next = it.next();
/* if this is the last (or only) listener, send him the original
* buffer, otherwise send him a copy of the buffer */
if(it.hasNext())
{
next.receive(samples.copyOf());
}
else
{
next.receive(samples);
}
}
}
public double getSampleRate()
{
if(mTargetDataLine != null)
@@ -240,11 +222,14 @@ public class RealMixerSource extends RealSource
mTargetDataLine.read(buffer, 0, buffer.length);
/* Convert samples to float array */
float[] samples =
mSampleAdapter.convert(buffer);
//TODO: change this sample adapter over to use reusable buffers and move the buffer queue into the adapter
float[] samples = mSampleAdapter.convert(buffer);
/* Dispatch samples to registered listeners */
broadcast(new RealBuffer(samples));
ReusableBuffer reusableBuffer = mReusableBufferQueue.getBuffer(samples.length);
reusableBuffer.reloadFrom(samples, System.currentTimeMillis());
reusableBuffer.incrementUserCount();
mBufferBroadcaster.broadcast(reusableBuffer);
}
catch(Exception e)
{

4
src/main/java/io/github/dsheirer/source/tuner/TunerController.java
View File

@@ -18,7 +18,7 @@
package io.github.dsheirer.source.tuner;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.buffer.IReusableBufferProvider;
import io.github.dsheirer.sample.buffer.IReusableComplexBufferProvider;
import io.github.dsheirer.sample.buffer.ReusableBufferBroadcaster;
import io.github.dsheirer.sample.buffer.ReusableComplexBuffer;
import io.github.dsheirer.source.ISourceEventListener;
@@ -33,7 +33,7 @@ import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract class TunerController implements Tunable, ISourceEventProcessor, ISourceEventListener,
IReusableBufferProvider<ReusableComplexBuffer>, Listener<ReusableComplexBuffer>
IReusableComplexBufferProvider, Listener<ReusableComplexBuffer>
{
private final static Logger mLog = LoggerFactory.getLogger(TunerController.class);
protected ReusableBufferBroadcaster mReusableBufferBroadcaster = new ReusableBufferBroadcaster();

24
src/main/java/io/github/dsheirer/source/wave/ComplexWaveSource.java
View File

@@ -34,7 +34,7 @@ import java.io.File;
import java.io.IOException;
import java.util.Arrays;
public class ComplexWaveSource extends ComplexSource implements IControllableFileSource
public class ComplexWaveSource extends ComplexSource implements IControllableFileSource, AutoCloseable
{
private final static Logger mLog = LoggerFactory.getLogger(ComplexWaveSource.class);
@@ -275,4 +275,26 @@ public class ComplexWaveSource extends ComplexSource implements IControllableFil
{
mFrameLocationListener = null;
}
/**
* Indicates if the file is a supported audio file type
*/
public static boolean supports(File file)
{
try(AudioInputStream ais = AudioSystem.getAudioInputStream(file))
{
AudioFormat format = ais.getFormat();
if(format.getChannels() == 2 && format.getSampleSizeInBits() == 16)
{
return true;
}
}
catch(Exception e)
{
//Do nothing, we'll return a default of false
}
return false;
}
}

47
src/main/java/io/github/dsheirer/source/wave/RealWaveSource.java
View File

@@ -19,7 +19,8 @@ package io.github.dsheirer.source.wave;
import io.github.dsheirer.sample.ConversionUtils;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.real.RealBuffer;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.buffer.ReusableBufferQueue;
import io.github.dsheirer.source.IControllableFileSource;
import io.github.dsheirer.source.IFrameLocationListener;
import io.github.dsheirer.source.RealSource;
@@ -39,11 +40,12 @@ public class RealWaveSource extends RealSource implements IControllableFileSourc
{
private final static Logger mLog = LoggerFactory.getLogger(RealWaveSource.class);
private ReusableBufferQueue mReusableBufferQueue = new ReusableBufferQueue("RealWaveSource");
private IFrameLocationListener mFrameLocationListener;
private int mBytesPerFrame;
private int mFrameCounter = 0;
private long mFrequency = 0;
private Listener<RealBuffer> mListener;
private Listener<ReusableBuffer> mListener;
private AudioInputStream mInputStream;
private File mFile;
@@ -52,7 +54,7 @@ public class RealWaveSource extends RealSource implements IControllableFileSourc
mFile = file;
}
@Override
@Override
public void setSourceEventListener(Listener<SourceEvent> listener)
{
//Not implemented
@@ -226,20 +228,22 @@ public class RealWaveSource extends RealSource implements IControllableFileSourc
buffer = Arrays.copyOf(buffer, samplesRead);
}
float[] samples = ConversionUtils
.convertFromSigned16BitSamples(buffer);
float[] samples = ConversionUtils.convertFromSigned16BitSamples(buffer);
mListener.receive(new RealBuffer(samples));
ReusableBuffer reusableBuffer = mReusableBufferQueue.getBuffer(samples.length);
reusableBuffer.reloadFrom(samples, System.currentTimeMillis());
reusableBuffer.incrementUserCount();
mListener.receive(reusableBuffer);
}
}
}
/**
* Registers the listener to receive sample buffers as they are read from
* the wave file
* Registers the listener to receive sample buffers as they are read from the wave file
*/
@Override
public void setListener(Listener<RealBuffer> listener)
public void setListener(Listener<ReusableBuffer> listener)
{
mListener = listener;
}
@@ -247,7 +251,8 @@ public class RealWaveSource extends RealSource implements IControllableFileSourc
/**
* Unregisters the listener from receiving sample buffers
*/
public void removeListener(Listener<RealBuffer> listener)
@Override
public void removeListener(Listener<ReusableBuffer> listener)
{
mListener = null;
}
@@ -285,4 +290,26 @@ public class RealWaveSource extends RealSource implements IControllableFileSourc
{
mFrameLocationListener = null;
}
/**
* Indicates if the file is a supported audio file type
*/
public static boolean supports(File file)
{
try(AudioInputStream ais = AudioSystem.getAudioInputStream(file))
{
AudioFormat format = ais.getFormat();
if(format.getChannels() == 1 && format.getSampleSizeInBits() == 16)
{
return true;
}
}
catch(Exception e)
{
//Do nothing, we'll return a default of false
}
return false;
}
}