ApplicationChunk.java

package org.jaudiotagger.audio.aiff;

import java.io.IOException;
import java.io.RandomAccessFile;
import org.jaudiotagger.audio.generic.Utils;

public class ApplicationChunk extends Chunk {

//  private AiffTag aiffTag;
  private AiffAudioHeader aiffHeader;
  
  /**
   * Constructor.
   * 
   * @param hdr      The header for this chunk
   * @param raf      The file from which the AIFF data are being read
   */
  public ApplicationChunk (
          ChunkHeader hdr, 
          RandomAccessFile raf,
          AiffAudioHeader aHdr)
  {
      super (raf, hdr);
      aiffHeader = aHdr;
  }

  /** Reads a chunk and puts an Application property into
   *  the RepInfo object. 
   * 
   *  @return   <code>false</code> if the chunk is structurally
   *            invalid, otherwise <code>true</code>
   */
  public boolean readChunk () throws IOException
  {
      String applicationSignature = Utils.readString(raf, 4);
      String applicationName = null;
      byte[] data = new byte[(int) (bytesLeft - 4)];
      raf.readFully(data);
      // If the application signature is 'pdos' or 'stoc',
      // then the beginning of the data area is a Pascal
      // string naming the application.  Otherwise, we
      // ignore the data.  ('pdos' is for Apple II
      // applications, 'stoc' for the entire non-Apple world.)
      if ("stoc".equals (applicationSignature) ||
              "pdos".equals (applicationSignature)) {
          applicationName = AiffUtil.bytesToPascalString(data);
      }
      aiffHeader.addApplicationIdentifier
             (applicationSignature + ": " + applicationName);
      
      return true;
  }
}