/**
 * Copyright (c) 2011, The University of Southampton and the individual contributors.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *   *  Redistributions of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 *
 *   *  Redistributions in binary form must reproduce the above copyright notice,
 *      this list of conditions and the following disclaimer in the documentation
 *      and/or other materials provided with the distribution.
 *
 *   *  Neither the name of the University of Southampton nor the names of its
 *      contributors may be used to endorse or promote products derived from this
 *      software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/**
 *
 */
package org.openimaj.docs.tutorial.fund.audio;

import java.net.MalformedURLException;
import java.net.URL;

import org.openimaj.audio.features.MFCC;
import org.openimaj.video.xuggle.XuggleAudio;
import org.openimaj.vis.general.BarVisualisation;

/**
 *      Example that shows the extraction of MFCC features from an audio stream
 *      and displaying the results in a visualisation.
 *
 *      @author David Dupplaw (dpd@ecs.soton.ac.uk)
 *  @created 18 Jun 2013
 *      @version $Author$, $Revision$, $Date$
 */
public class MFCCs
{
        /**
         *      Main method
         *      @param args Command-line args (unused)
         *      @throws MalformedURLException Will not be thrown
         */
        public static void main( final String[] args ) throws MalformedURLException
        {
                // Open a URL to the sine wave sweep. If you have downloaded
                // this file you should use a new File(<filename>) here.
                final XuggleAudio xa = new XuggleAudio(
                        new URL( "http://www.audiocheck.net/download.php?" +
                                        "filename=Audio/audiocheck.net_sweep20-20klin.wav" ) );

                // Create the Fourier transform processor chained to the audio decoder
                final MFCC mfcc = new MFCC( xa );

                // Create a visualisation to show our FFT and open the window now
                final BarVisualisation bv = new BarVisualisation( 400, 200 );
                bv.showWindow( "MFCCs" );

                // Loop through the sample chunks from the audio capture thread
                // sending each one through the feature extractor and displaying
                // the results in the visualisation.
                while( mfcc.nextSampleChunk() != null )
                {
                        final double[][] mfccs = mfcc.getLastCalculatedFeatureWithoutFirst();
                        bv.setData( mfccs[0] );
                }
        }
}