#1353 Resolves issue where polyphase channelizer would mis-tune channels after a period of time resulting in idle decoding channels. (#1354)

Co-authored-by: Dennis Sheirer <dsheirer@github.com>

src/main/java/io/github/dsheirer/sample/complex/ComplexSampleListenerModule.java

@@ -0,0 +1,92 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2022 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.complex;
+
+import io.github.dsheirer.buffer.INativeBuffer;
+import io.github.dsheirer.module.Module;
+import io.github.dsheirer.sample.Broadcaster;
+import io.github.dsheirer.sample.Listener;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Module that receives and rebroadcasts complex samples.
+ */
+public class ComplexSampleListenerModule extends Module implements IComplexSamplesListener, Listener<ComplexSamples>
+{
+    private static final Logger mLog = LoggerFactory.getLogger(ComplexSampleListenerModule.class);
+    private Broadcaster<INativeBuffer> mBroadcaster = new Broadcaster<>();
+
+    /**
+     * Implements the interface
+     * @return this.
+     */
+    @Override
+    public Listener<ComplexSamples> getComplexSamplesListener()
+    {
+        return this;
+    }
+
+    /**
+     * Primary receive method for sample buffers to rebroadcast.
+     * @param complexSamples to rebroadcast
+     */
+    @Override
+    public void receive(ComplexSamples complexSamples)
+    {
+        mBroadcaster.broadcast(new ComplexSamplesNativeBufferAdapter(complexSamples));
+    }
+
+    /**
+     * Adds listener to receive rebroadcast of complex samples buffer.
+     * @param listener to add
+     */
+    public void addListener(Listener<INativeBuffer> listener)
+    {
+        mBroadcaster.addListener(listener);
+    }
+
+    /**
+     * Removes the listener from receiving rebroadcast of complex samples.
+     * @param listener to remove
+     */
+    public void removeListener(Listener<INativeBuffer> listener)
+    {
+        mBroadcaster.removeListener(listener);
+    }
+
+    @Override
+    public void reset()
+    {
+        //Not implemented
+    }
+
+    @Override
+    public void start()
+    {
+        //Not implemented
+    }
+
+    @Override
+    public void stop()
+    {
+        //Not implemented
+    }
+}

src/main/java/io/github/dsheirer/sample/complex/ComplexSamplesNativeBufferAdapter.java

@@ -0,0 +1,107 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2022 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.complex;
+
+import io.github.dsheirer.buffer.INativeBuffer;
+import java.util.Iterator;
+
+/**
+ * Adapts a single complex samples buffer to be compatible as an INativeBuffer instance.
+ */
+public class ComplexSamplesNativeBufferAdapter implements INativeBuffer
+{
+    private ComplexSamples mComplexSamples;
+    private long mTimestamp = System.currentTimeMillis();
+
+    /**
+     * Constructs an instance
+     * @param complexSamples to adapt/convert to an INativeBuffer
+     */
+    public ComplexSamplesNativeBufferAdapter(ComplexSamples complexSamples)
+    {
+        mComplexSamples = complexSamples;
+    }
+
+    @Override
+    public Iterator<ComplexSamples> iterator()
+    {
+        return new ComplexSamplesIterator();
+    }
+
+    @Override
+    public Iterator<InterleavedComplexSamples> iteratorInterleaved()
+    {
+        return new InterleavedComplexSamplesIterator();
+    }
+
+    @Override
+    public int sampleCount()
+    {
+        return mComplexSamples.i().length;
+    }
+
+    @Override
+    public long getTimestamp()
+    {
+        return mTimestamp;
+    }
+
+    /**
+     * Simple iterator implementation.
+     */
+    public class ComplexSamplesIterator implements Iterator<ComplexSamples>
+    {
+        public boolean mHasNext = true;
+
+        @Override
+        public boolean hasNext()
+        {
+            return mHasNext;
+        }
+
+        @Override
+        public ComplexSamples next()
+        {
+            mHasNext = false;
+            return mComplexSamples;
+        }
+    }
+
+    /**
+     * Simple iterator implementation.
+     */
+    public class InterleavedComplexSamplesIterator implements Iterator<InterleavedComplexSamples>
+    {
+        public boolean mHasNext = true;
+
+        @Override
+        public boolean hasNext()
+        {
+            return mHasNext;
+        }
+
+        @Override
+        public InterleavedComplexSamples next()
+        {
+            mHasNext = false;
+            return mComplexSamples.toInterleaved();
+        }
+    }
+}