001/**
002 * Copyright (c) 2011, The University of Southampton and the individual contributors.
003 * All rights reserved.
004 *
005 * Redistribution and use in source and binary forms, with or without modification,
006 * are permitted provided that the following conditions are met:
007 *
008 *   *  Redistributions of source code must retain the above copyright notice,
009 *      this list of conditions and the following disclaimer.
010 *
011 *   *  Redistributions in binary form must reproduce the above copyright notice,
012 *      this list of conditions and the following disclaimer in the documentation
013 *      and/or other materials provided with the distribution.
014 *
015 *   *  Neither the name of the University of Southampton nor the names of its
016 *      contributors may be used to endorse or promote products derived from this
017 *      software without specific prior written permission.
018 *
019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
020 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
021 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
022 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
023 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
026 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
028 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029 */
030/**
031 *
032 */
033package org.openimaj.docs.tutorial.fund.audio;
034
035import java.net.MalformedURLException;
036
037import org.openimaj.audio.AudioFormat;
038import org.openimaj.audio.JavaSoundAudioGrabber;
039import org.openimaj.audio.features.SpectralFlux;
040import org.openimaj.audio.processor.FixedSizeSampleAudioProcessor;
041import org.openimaj.vis.general.BarVisualisation;
042
043/**
044 *      Example that shows the extraction of MFCC features from a live audio stream
045 *      and displaying the results in a visualisation.
046 *
047 *      @author David Dupplaw (dpd@ecs.soton.ac.uk)
048 *  @created 18 Jun 2013
049 *      @version $Author$, $Revision$, $Date$
050 */
051public class SpectralFluxLive
052{
053        /**
054         *      Main method
055         *      @param args Command-line args (unused)
056         *      @throws MalformedURLException Will not be thrown
057         */
058        public static void main( final String[] args ) throws MalformedURLException
059        {
060                // Open a sound grabber from your microphone
061                final JavaSoundAudioGrabber jsag = new JavaSoundAudioGrabber(
062                                new AudioFormat( 16, 44.1, 1 ) );
063                new Thread( jsag ).start();
064
065                // Let's create 30ms windows with 10ms overlap
066                final FixedSizeSampleAudioProcessor fssap = new FixedSizeSampleAudioProcessor( jsag, 441*3, 441 );
067
068                // Create the Fourier transform processor chained to the audio decoder
069                final SpectralFlux spectralFlux = new SpectralFlux( fssap );
070
071                // Create a visualisation to show our flux value and open the window now
072                final BarVisualisation bv = new BarVisualisation( 400, 200 );
073                bv.setAxisLocation( 100 );
074                bv.setMaxValue( 0.0001 );
075                bv.showWindow( "SpectralFlux" );
076
077                // Loop through the sample chunks from the audio capture thread
078                // sending each one through the feature extractor and displaying
079                // the results in the visualisation.
080                while( spectralFlux.nextSampleChunk() != null )
081                {
082                        final double[][] flux = spectralFlux.getLastCalculatedFeature();
083                        bv.setData( flux[0] );
084                }
085        }
086}