Package entagged.audioformats.mp3

Source Code of entagged.audioformats.mp3.Mp3FileReader

/*
* Entagged Audio Tag library
* Copyright (c) 2003-2005 Rapha�l Slinckx <raphael@slinckx.net>
*
* This library 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; either
* version 2.1 of the License, or (at your option) any later version.
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
package entagged.audioformats.mp3;


import java.io.*;

import entagged.audioformats.EncodingInfo;
import entagged.audioformats.Tag;
import entagged.audioformats.exceptions.CannotReadException;
import entagged.audioformats.generic.AudioFileReader;
import entagged.audioformats.generic.GenericTag;
import entagged.audioformats.mp3.util.Id3v1TagReader;
import entagged.audioformats.mp3.util.Id3v2TagReader;
import entagged.audioformats.mp3.util.Mp3InfoReader;

public class Mp3FileReader extends AudioFileReader {
 
  private Mp3InfoReader ir = new Mp3InfoReader();
  private Id3v2TagReader idv2tr = new Id3v2TagReader();
  private Id3v1TagReader idv1tr = new Id3v1TagReader();
 
  protected EncodingInfo getEncodingInfo( RandomAccessFile raf throws CannotReadException, IOException {
    return ir.read(raf);
  }
 
  protected Tag getTag( RandomAccessFile raf throws IOException {
    String error = "";
    Id3v2Tag v2 = null;
    Id3v1Tag v1 = null;
   
    try {
      v2 = idv2tr.read(raf);
    } catch(CannotReadException e) {
      v2 = null;
      error += "("+e.getMessage()+")";
    }
   
    try {
      v1 = idv1tr.read(raf);
    } catch(CannotReadException e) {
      v1 = null;
      error += "("+e.getMessage()+")";
    }

    if(v1 == null && v2 == null)
      return new GenericTag();
           
   
    if(v2 == null) {
      return v1;
    }
    else if(v1 != null) {
      v2.merge( v1 );
      v2.hasId3v1(true);
    }
   
    return v2;
  }
}
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