sound.jarnbjo.vorbis.CodeBook Maven / Gradle / Ivy

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/*
 * $ProjectName$
 * $ProjectRevision$
 * -----------------------------------------------------------
 * $Id: CodeBook.java,v 1.3 2003/04/10 19:49:04 jarnbjo Exp $
 * -----------------------------------------------------------
 *
 * $Author: jarnbjo $
 *
 * Description:
 *
 * Copyright 2002-2003 Tor-Einar Jarnbjo
 * -----------------------------------------------------------
 *
 * Change History
 * -----------------------------------------------------------
 * $Log: CodeBook.java,v $
 * Revision 1.3  2003/04/10 19:49:04  jarnbjo
 * no message
 *
 * Revision 1.2  2003/03/16 01:11:12  jarnbjo
 * no message
 *
 *
 */

package sound.jarnbjo.vorbis;

import java.io.IOException;
import java.util.Arrays;

import sound.jarnbjo.util.io.BitInputStream;
import sound.jarnbjo.util.io.HuffmanNode;

public class CodeBook {

   private HuffmanNode huffmanRoot;
   private int dimensions, entries;

   private int[] entryLengths;
   private float[][] valueVector;

   protected CodeBook(BitInputStream source) throws VorbisFormatException, IOException {

      // check sync
      if(source.getInt(24)!=0x564342) {
         throw new VorbisFormatException("The code book sync pattern is not correct.");
      }

      dimensions=source.getInt(16);
      entries=source.getInt(24);

      entryLengths=new int[entries];

      boolean ordered=source.getBit();

      if(ordered) {
         int cl=source.getInt(5)+1;
         for(int i=0; ientryLengths.length) {
               throw new VorbisFormatException("The codebook entry length list is longer than the actual number of entry lengths.");
            }
            Arrays.fill(entryLengths, i, i+num, cl);
            cl++;
            i+=num;
         }
      }
      else {
         // !ordered
         boolean sparse=source.getBit();

         if(sparse) {
            for(int i=0; i0) {
            if(!huffmanRoot.setNewValue(el, i)) {
               return false;
            }
         }
      }
      return true;
   }

   protected int getDimensions() {
      return dimensions;
   }

   protected int getEntries() {
      return entries;
   }

   protected HuffmanNode getHuffmanRoot() {
      return huffmanRoot;
   }

   //public float[] readVQ(ReadableBitChannel source) throws IOException {
   //   return valueVector[readInt(source)];
   //}

   protected int readInt(final BitInputStream source) throws IOException {
      return source.getInt(huffmanRoot);
      /*
      HuffmanNode node;
      for(node=huffmanRoot; node.value==null; node=source.getBit()?node.o1:node.o0);
      return node.value.intValue();
      */
   }

   protected void readVvAdd(float[][] a, BitInputStream source, int offset, int length)
      throws VorbisFormatException, IOException {

      int i,j;//k;//entry;
      int chptr=0;
      int ch=a.length;

      if(ch==0) {
         return;
      }

      int lim=(offset+length)/ch;

      for(i=offset/ch;i8){
         for(i=0;i