content: ///**
  //* Copyright 2004-2006 DFKI GmbH.
  //* All Rights Reserved.  Use is subject to license terms.
  //*
  //* This file is part of MARY TTS.
  //*
  //* MARY TTS is free software: you can redistribute it and/or modify
  //* it under the terms of the GNU Lesser General Public License as published by
  //* the Free Software Foundation, version 3 of the License.
  //*
  //* 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 Lesser General Public License for more details.
  //*
  //* You should have received a copy of the GNU Lesser General Public License
  //* along with this program.  If not, see <http://www.gnu.org/licenses/>.
  //*
  //*/
  //package marytts.signalproc.display;
  //
  //
  //import java.io.File;
  //
  //import lib.sound.sampled.AudioFormat;
  //import lib.sound.sampled.AudioInputStream;
  //import lib.sound.sampled.AudioSystem;
  //
  //import marytts.signalproc.analysis.EnergyAnalyser;
  //import marytts.signalproc.analysis.FrameBasedAnalyser;
  //import marytts.util.data.BufferedDoubleDataSource;
  //import marytts.util.data.DoubleDataSource;
  //import marytts.util.data.audio.AudioDoubleDataSource;
  //
  //
  ///**
  //*
  //* @author Marc Schr&ouml;der
  //*
  //* Shows silence regions on the input signal using automatic silence detection based on energy histogram
  //*
  //*/
  //public class SilenceMarker extends Histogram
  //{
  //    public SilenceMarker(AudioInputStream ais) {
  //        this(ais, DEFAULT_WIDTH, DEFAULT_HEIGHT);
  //    }
  //
  //    public SilenceMarker(AudioInputStream ais, int width, int height) {
  //        super();
  //        if (!ais.getFormat().getEncoding().equals(AudioFormat.Encoding.PCM_SIGNED)) {
  //            ais = AudioSystem.getAudioInputStream(AudioFormat.Encoding.PCM_SIGNED, ais);
  //        }
  //        if (ais.getFormat().getChannels() > 1) {
  //            throw new IllegalArgumentException("Can only deal with mono audio signals");
  //        }
  //        int samplingRate = (int) ais.getFormat().getSampleRate();
  //        DoubleDataSource signal = new AudioDoubleDataSource(ais);
  //        initialise(signal, samplingRate, width, height);
  //    }
  //
  //    public SilenceMarker(double[] signal, int samplingRate)
  //    {
  //        this(signal, samplingRate, DEFAULT_WIDTH, DEFAULT_HEIGHT);
  //    }
  //
  //    public SilenceMarker(double[] signal, int samplingRate, int width, int height)
  //    {
  //        initialise(new BufferedDoubleDataSource(signal), samplingRate, width, height);
  //    }
  //
  //    protected void initialise(DoubleDataSource signal, int samplingRate, int width, int height)
  //    {
  //        showYAxis = false;
  //        showXAxis = false;
  //        paddingTop = 5;
  //        paddingBottom = 5;
  //        double frameDuration = 0.01; // seconds
  //        int frameLength = (int) (samplingRate*frameDuration);
  //        int frameShift = frameLength / 2;
  //        if (frameLength%2==0) frameLength++; // make sure frame length is odd
  //        EnergyAnalyser energyAnalyser = new EnergyAnalyser(signal, frameLength, frameShift, samplingRate);
  //        double silenceCutoff = energyAnalyser.getSilenceCutoff();
  //        FrameBasedAnalyser.FrameAnalysisResult[] results = energyAnalyser.analyseAllFrames();
  //        double[] silenceData = new double[results.length];
  //        for (int i=0; i<results.length; i++) {
  //            double energy = ((Double)results[i].get()).doubleValue();
  //            if (energy <= silenceCutoff) silenceData[i] = 0.;
  //            else silenceData[i] = 1.;
  //        }
  //        super.initialise(width, height, 0, (double)frameShift/samplingRate, silenceData);
  //        histogramBorderColor = Color.LIGHT_GRAY;
  //        setPrimaryDataSeriesStyle(histogramBorderColor, DRAW_HISTOGRAM, -1);
  //    }
  //
  //    public static void main(String[] args) throws Exception
  //    {
  //        for (int i=0; i<args.length; i++) {
  //            AudioInputStream ais = AudioSystem.getAudioInputStream(new File(args[i]));
  //            SilenceMarker signalGraph = new SilenceMarker(ais);
  //            signalGraph.showInJFrame(args[i], true, false);
  //        }
  //    }
  //}
  //
  