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1   /*
2    * Copyright (c) 2002-2014, Mairie de Paris
3    * All rights reserved.
4    *
5    * Redistribution and use in source and binary forms, with or without
6    * modification, are permitted provided that the following conditions
7    * are met:
8    *
9    *  1. Redistributions of source code must retain the above copyright notice
10   *     and the following disclaimer.
11   *
12   *  2. Redistributions in binary form must reproduce the above copyright notice
13   *     and the following disclaimer in the documentation and/or other materials
14   *     provided with the distribution.
15   *
16   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
17   *     contributors may be used to endorse or promote products derived from
18   *     this software without specific prior written permission.
19   *
20   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
24   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30   * POSSIBILITY OF SUCH DAMAGE.
31   *
32   * License 1.0
33   */
34  package fr.paris.lutece.plugins.captcha.modules.jcaptcha.service.sound;
35  
36  import fr.paris.lutece.portal.service.util.AppLogService;
37  
38  import java.io.ByteArrayOutputStream;
39  import java.io.File;
40  import java.io.IOException;
41  
42  import java.util.ArrayList;
43  import java.util.List;
44  
45  import javax.sound.sampled.AudioFileFormat;
46  import javax.sound.sampled.AudioFormat;
47  import javax.sound.sampled.AudioInputStream;
48  import javax.sound.sampled.AudioSystem;
49  
50  
51  /**
52   *
53   */
54  public final class AudioConcat
55  {
56      /**
57       *
58       *
59       */
60      private AudioConcat(  )
61      {
62      }
63  
64      /**
65       * Return byte array of concatened audio files
66       *
67       * @param files
68       *            to cancatenate
69       * @return byte array of concatened audio files
70       */
71      public static ByteArrayOutputStream concat( File... files )
72      {
73          List<AudioInputStream> audioInputStreamList = new ArrayList<AudioInputStream>(  );
74          AudioInputStream audioInputStream = null;
75          AudioFormat audioFormat = null;
76  
77          for ( File soundFile : files )
78          {
79              try
80              {
81                  audioInputStream = AudioSystem.getAudioInputStream( soundFile );
82              }
83              catch ( Exception e )
84              {
85                  AppLogService.error( e.getMessage(  ), e );
86              }
87  
88              audioInputStreamList.add( audioInputStream );
89  
90              AudioFormat format = audioInputStream.getFormat(  );
91  
92              if ( audioFormat == null )
93              {
94                  audioFormat = format;
95              }
96          }
97  
98          return concat( audioInputStreamList, audioFormat );
99      }
100 
101     /**
102      * Return byte array of concatened stream list.
103      *
104      * @param audioInputStreamList
105      *            the list to contatenate
106      * @param audioFormat
107      *            the result format
108      * @return byte array of concatened stream list.
109      */
110     public static ByteArrayOutputStream concat( List<AudioInputStream> audioInputStreamList, AudioFormat audioFormat )
111     {
112         AudioInputStream audioInputStream = new SequenceAudioInputStream( audioFormat, audioInputStreamList );
113         ByteArrayOutputStream outputStream = new ByteArrayOutputStream(  );
114 
115         try
116         {
117             AudioSystem.write( audioInputStream, AudioFileFormat.Type.WAVE, outputStream );
118             outputStream.flush(  );
119             outputStream.close(  );
120         }
121         catch ( IOException e )
122         {
123             AppLogService.error( e.getMessage(  ), e );
124         }
125 
126         return outputStream;
127     }
128 }