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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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47
src/main/java/io/github/dsheirer/source/mixer/RealMixerSource.java
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@@ -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)
{