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Vorbis SPI support. Combination of JOrbis, JavaSPI and Tritonus-Share.
There is a newer version: 1.1.0
/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
/* JOrbis
 * Copyright (C) 2000 ymnk, JCraft,Inc.
 *  
 * Written by: 2000 ymnk
 *   
 * Many thanks to 
 *   Monty  and 
 *   The XIPHOPHORUS Company http://www.xiph.org/ .
 * JOrbis has been based on their awesome works, Vorbis codec.
 *   
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public License
 * as published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
   
 * This program 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 Library General Public License for more details.
 * 
 * You should have received a copy of the GNU Library General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

package com.github.trilarion.jcraft.jorbis;

public class DspState{
  static final float M_PI=3.1415926539f;
  static final int VI_TRANSFORMB=1;
  static final int VI_WINDOWB=1;

  int analysisp;
  Info vi;
  int modebits;

  float[][] pcm;
  int pcm_storage;
  int pcm_current;
  int pcm_returned;

  float[] multipliers;
  int envelope_storage;
  int envelope_current;

  int eofflag;

  int lW;
  int W;
  int nW;
  int centerW;

  long granulepos;
  long sequence;

  long glue_bits;
  long time_bits;
  long floor_bits;
  long res_bits;

  // local lookup storage
  float[][][][][] window; // block, leadin, leadout, type
  Object[][] transform;
  CodeBook[] fullbooks;
  // backend lookups are tied to the mode, not the backend or naked mapping
  Object[] mode;

  // local storage, only used on the encoding side.  This way the
  // application does not need to worry about freeing some packets'
  // memory and not others'; packet storage is always tracked.
  // Cleared next call to a _dsp_ function
  byte[] header;
  byte[] header1;
  byte[] header2;

  public DspState(){
    transform=new Object[2][];
    window=new float[2][][][][];
    window[0]=new float[2][][][];
    window[0][0]=new float[2][][];
    window[0][1]=new float[2][][];
    window[0][0][0]=new float[2][];
    window[0][0][1]=new float[2][];
    window[0][1][0]=new float[2][];
    window[0][1][1]=new float[2][];
    window[1]=new float[2][][][];
    window[1][0]=new float[2][][];
    window[1][1]=new float[2][][];
    window[1][0][0]=new float[2][];
    window[1][0][1]=new float[2][];
    window[1][1][0]=new float[2][];
    window[1][1][1]=new float[2][];
  }

  static float[] window(int type, int window, int left, int right){
    float[] ret=new float[window];
    switch(type){
      case 0:
        // The 'vorbis window' (window 0) is sin(sin(x)*sin(x)*2pi)
      {
        int leftbegin=window/4-left/2;
        int rightbegin=window-window/4-right/2;

        for(int i=0; ivi.blocksizes[1]/2&&pcm_returned>8192){
      // don't shift too much; we need to have a minimum PCM buffer of
      // 1/2 long block

      int shiftPCM=centerW-vi.blocksizes[1]/2;
      shiftPCM=(pcm_returnedpcm_storage){
        // expand the storage
        pcm_storage=endW+vi.blocksizes[1];
        for(int i=0; igranulepos.
      //       
      // This is not foolproof!  It will be confused if we begin
      // decoding at the last page after a seek or hole.  In that case,
      // we don't have a starting point to judge where the last frame
      // is.  For this reason, vorbisfile will always try to make sure
      // it reads the last two marked pages in proper sequence

      if(granulepos==-1){
        granulepos=vb.granulepos;
      }
      else{
        granulepos+=(_centerW-centerW);
        if(vb.granulepos!=-1&&granulepos!=vb.granulepos){
          if(granulepos>vb.granulepos&&vb.eofflag!=0){
            // partial last frame.  Strip the padding off
            _centerW-=(granulepos-vb.granulepos);
          }// else{ Shouldn't happen *unless* the bitstream is out of
          // spec.  Either way, believe the bitstream }
          granulepos=vb.granulepos;
        }
      }

      // Update, cleanup

      centerW=_centerW;
      pcm_current=endW;
      if(vb.eofflag!=0)
        eofflag=1;
    }
    return (0);
  }

  // pcm==NULL indicates we just want the pending samples, no more
  public int synthesis_pcmout(float[][][] _pcm, int[] index){
    if(pcm_returnedcenterW)
      return (-1);
    pcm_returned+=bytes;
    return (0);
  }

  public void clear(){
  }
}