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#36 NBFM squelch control. Updates NBFM decoder to incorporate squelch control. Squelch is a configuration item and also available to adjust at runtime with new 'Channel' tab in Now Playing window. All decoders were updated to produce continuous channel power (dB) measurements that are displayed in the Channel tab's new Power Meter. (#1100)
Co-authored-by: Dennis Sheirer <dsheirer@github.com>
This commit is contained in:
Denny Sheirer
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package io.github.dsheirer.gui.power;
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import io.github.dsheirer.controller.channel.Channel;
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import io.github.dsheirer.dsp.squelch.ISquelchConfiguration;
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import io.github.dsheirer.gui.control.DbPowerMeter;
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import io.github.dsheirer.module.ProcessingChain;
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import io.github.dsheirer.playlist.PlaylistManager;
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import io.github.dsheirer.sample.Listener;
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import io.github.dsheirer.source.SourceEvent;
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import jiconfont.icons.font_awesome.FontAwesome;
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import jiconfont.swing.IconFontSwing;
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import net.miginfocom.swing.MigLayout;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import javax.swing.Icon;
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import javax.swing.JButton;
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import javax.swing.JLabel;
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import javax.swing.JPanel;
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import java.awt.EventQueue;
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import java.text.DecimalFormat;
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/**
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* Display for channel power and squelch details
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*/
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public class ChannelPowerPanel extends JPanel implements Listener<ProcessingChain>
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{
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private static final Logger mLog = LoggerFactory.getLogger(ChannelPowerPanel.class);
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private static final DecimalFormat DECIMAL_FORMAT = new DecimalFormat("0.0");
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private static final String NOT_AVAILABLE = "Not Available";
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private PlaylistManager mPlaylistManager;
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private ProcessingChain mProcessingChain;
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private DbPowerMeter mPowerMeter = new DbPowerMeter();
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private PeakMonitor mPeakMonitor = new PeakMonitor(DbPowerMeter.DEFAULT_MINIMUM_POWER);
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private SourceEventProcessor mSourceEventProcessor = new SourceEventProcessor();
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private JLabel mPowerLabel;
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private JLabel mPeakLabel;
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private JLabel mSquelchLabel;
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private JLabel mSquelchValueLabel;
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private JButton mSquelchUpButton;
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private JButton mSquelchDownButton;
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private double mSquelchThreshold;
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/**
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* Constructs an instance.
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*/
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public ChannelPowerPanel(PlaylistManager playlistManager)
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{
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mPlaylistManager = playlistManager;
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setLayout(new MigLayout("", "[][grow,fill]", "[grow,fill]"));
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mPowerMeter.setPeakVisible(true);
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mPowerMeter.setSquelchThresholdVisible(true);
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add(mPowerMeter);
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JPanel valuePanel = new JPanel();
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valuePanel.setLayout(new MigLayout("", "[right][left][][]", ""));
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mPeakLabel = new JLabel("0");
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valuePanel.add(new JLabel("Peak:"));
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valuePanel.add(mPeakLabel, "wrap");
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mPowerLabel = new JLabel("0");
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valuePanel.add(new JLabel("Power:"));
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valuePanel.add(mPowerLabel, "wrap");
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mSquelchLabel = new JLabel("Squelch:");
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mSquelchLabel.setEnabled(false);
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valuePanel.add(mSquelchLabel);
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mSquelchValueLabel = new JLabel(NOT_AVAILABLE);
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mSquelchValueLabel.setEnabled(false);
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valuePanel.add(mSquelchValueLabel, "wrap");
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IconFontSwing.register(FontAwesome.getIconFont());
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Icon iconUp = IconFontSwing.buildIcon(FontAwesome.ANGLE_UP, 12);
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mSquelchUpButton = new JButton(iconUp);
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mSquelchUpButton.setEnabled(false);
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mSquelchUpButton.addActionListener(e -> broadcast(SourceEvent.requestSquelchThreshold(null, mSquelchThreshold + 1)));
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valuePanel.add(mSquelchUpButton);
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Icon iconDown = IconFontSwing.buildIcon(FontAwesome.ANGLE_DOWN, 12);
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mSquelchDownButton = new JButton(iconDown);
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mSquelchDownButton.setEnabled(false);
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mSquelchDownButton.addActionListener(e -> broadcast(SourceEvent.requestSquelchThreshold(null, mSquelchThreshold - 1)));
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valuePanel.add(mSquelchDownButton);
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add(valuePanel);
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}
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/**
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* Updates the channel's decode configuration with a new squelch threshold value
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*/
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private void setConfigSquelchThreshold(int threshold)
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{
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if(mProcessingChain != null)
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{
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Channel channel = mPlaylistManager.getChannelProcessingManager().getChannel(mProcessingChain);
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if(channel != null && channel.getDecodeConfiguration() instanceof ISquelchConfiguration)
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{
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ISquelchConfiguration configuration = (ISquelchConfiguration)channel.getDecodeConfiguration();
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configuration.setSquelchThreshold(threshold);
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mPlaylistManager.schedulePlaylistSave();
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}
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}
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}
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private void broadcast(SourceEvent sourceEvent)
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{
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if(mProcessingChain != null)
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{
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mProcessingChain.broadcast(sourceEvent);
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}
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}
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/**
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* Resets controls when changing processing chain source. Note: this must be called on the Swing
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* dispatch thread because it directly invokes swing components.
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*/
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private void reset()
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{
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mPeakMonitor.reset();
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mPowerMeter.reset();
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mPeakLabel.setText("0");
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mPowerLabel.setText("0");
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mSquelchLabel.setEnabled(false);
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mSquelchValueLabel.setText("Not Available");
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mSquelchValueLabel.setEnabled(false);
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mSquelchUpButton.setEnabled(false);
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mSquelchDownButton.setEnabled(false);
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}
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/**
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* Receive notifications of request to provide display of processing chain details.
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*/
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@Override
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public void receive(ProcessingChain processingChain)
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{
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if(mProcessingChain != null)
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{
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mProcessingChain.removeSourceEventListener(mSourceEventProcessor);
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}
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//Invoking reset - we're on the Swing dispatch thread here
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reset();
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mProcessingChain = processingChain;
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if(mProcessingChain != null)
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{
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mProcessingChain.addSourceEventListener(mSourceEventProcessor);
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}
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broadcast(SourceEvent.requestCurrentSquelchThreshold(null));
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}
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/**
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* Processor for source event stream to capture power level and squelch related source events.
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*/
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private class SourceEventProcessor implements Listener<SourceEvent>
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{
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@Override
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public void receive(SourceEvent sourceEvent)
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{
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switch(sourceEvent.getEvent())
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{
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case NOTIFICATION_CHANNEL_POWER ->
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{
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final double power = sourceEvent.getValue().doubleValue();
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final double peak = mPeakMonitor.process(power);
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EventQueue.invokeLater(new Runnable()
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{
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@Override
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public void run()
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{
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mPowerMeter.setPower(power);
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mPowerLabel.setText(DECIMAL_FORMAT.format(power));
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mPowerMeter.setPeak(peak);
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mPeakLabel.setText(DECIMAL_FORMAT.format(peak));
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}
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});
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}
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case NOTIFICATION_SQUELCH_THRESHOLD ->
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{
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final double threshold = sourceEvent.getValue().doubleValue();
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mSquelchThreshold = threshold;
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setConfigSquelchThreshold((int)threshold);
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EventQueue.invokeLater(new Runnable()
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{
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@Override
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public void run()
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{
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mPowerMeter.setSquelchThreshold(threshold);
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mSquelchLabel.setEnabled(true);
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mSquelchValueLabel.setEnabled(true);
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mSquelchValueLabel.setText(DECIMAL_FORMAT.format(threshold));
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mSquelchDownButton.setEnabled(true);
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mSquelchUpButton.setEnabled(true);
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}
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});
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}
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}
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}
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}
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}
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