Source for gnu.javax.sound.sampled.gstreamer.io.GstAudioFileReader

   1: /*GstAudioFileReader -- GNU Classpath GStreamer AudioFileReader.
   2:  Copyright (C) 2007 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package gnu.javax.sound.sampled.gstreamer.io;
  39: 
  40: import java.io.BufferedInputStream;
  41: import java.io.File;
  42: import java.io.FileInputStream;
  43: import java.io.IOException;
  44: import java.io.InputStream;
  45: import java.net.URL;
  46: 
  47: import javax.sound.sampled.AudioFileFormat;
  48: import javax.sound.sampled.AudioFormat;
  49: import javax.sound.sampled.AudioInputStream;
  50: import javax.sound.sampled.AudioSystem;
  51: import javax.sound.sampled.UnsupportedAudioFileException;
  52: import javax.sound.sampled.spi.AudioFileReader;
  53: 
  54: /**
  55:  * An implementation of a general AudioFileReader. Uses GStreamer to
  56:  * parse and retrieve informations about the file passed as input. 
  57:  * 
  58:  * @author Mario Torre <neugens@limasoftware.net>
  59:  */
  60: public class GstAudioFileReader
  61:     extends AudioFileReader
  62: {
  63:   @Override
  64:   public AudioFileFormat getAudioFileFormat(File file)
  65:       throws UnsupportedAudioFileException, IOException
  66:   {
  67:     throw new UnsupportedAudioFileException("Unsupported encoding.");
  68:   }
  69: 
  70:   @Override
  71:   public AudioFileFormat getAudioFileFormat(InputStream is)
  72:       throws UnsupportedAudioFileException, IOException
  73:   {
  74:     throw new UnsupportedAudioFileException("Unsupported encoding.");
  75:   }
  76: 
  77:   @Override
  78:   public AudioFileFormat getAudioFileFormat(URL url)
  79:       throws UnsupportedAudioFileException, IOException
  80:   {
  81:     return getAudioFileFormat(new BufferedInputStream(url.openStream()));
  82:   }
  83: 
  84:   @Override
  85:   public AudioInputStream getAudioInputStream(File file)
  86:       throws UnsupportedAudioFileException, IOException
  87:   { 
  88:     InputStream stream = new FileInputStream(file);
  89:     long length = file.length();
  90:     
  91:     AudioFormat format = null;
  92:     
  93:     try
  94:       {
  95:         format = GstAudioFileReaderNativePeer.getAudioFormat(file);
  96:       }
  97:     catch (Exception e)
  98:       {
  99:         // TODO Auto-generated catch block
 100:         e.printStackTrace();
 101:       }
 102:     
 103:     // get the header size
 104:     if (format == null)
 105:       throw new UnsupportedAudioFileException("Unsupported encoding.");
 106: 
 107:     return new AudioInputStream(stream, format, length);
 108:   }
 109: 
 110:   @Override
 111:   public AudioInputStream getAudioInputStream(InputStream is)
 112:       throws UnsupportedAudioFileException, IOException
 113:   {
 114:     AudioFormat format = null;
 115:     
 116:     try
 117:       {
 118:         format = GstAudioFileReaderNativePeer.getAudioFormat(is);
 119:       }
 120:     catch (Exception e)
 121:       {
 122:         // TODO Auto-generated catch block
 123:         e.printStackTrace();
 124:       }
 125:     
 126:     // get the header size
 127:     if (format == null)
 128:       throw new UnsupportedAudioFileException("Unsupported encoding.");
 129: 
 130:     return new AudioInputStream(is, format, AudioSystem.NOT_SPECIFIED);
 131:   }
 132: 
 133:   @Override
 134:   public AudioInputStream getAudioInputStream(URL url)
 135:       throws UnsupportedAudioFileException, IOException
 136:   {
 137:     return getAudioInputStream(new BufferedInputStream(url.openStream()));
 138:   }
 139: }