From 9fee0ec4ca0c5b7a334cc29dbb58e76c7a4c736e Mon Sep 17 00:00:00 2001
From: Michiel Van Der Kolk <not.valid@email.address>
Date: Mon, 11 Jul 2005 15:42:37 +0000
Subject: Songdb java version, source. only 1.5 compatible

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7101 a1c6a512-1295-4272-9138-f99709370657
---
 songdbj/com/jcraft/jogg/Buffer.java | 541 ++++++++++++++++++++++++++++++++++++
 1 file changed, 541 insertions(+)
 create mode 100644 songdbj/com/jcraft/jogg/Buffer.java

(limited to 'songdbj/com/jcraft/jogg/Buffer.java')

diff --git a/songdbj/com/jcraft/jogg/Buffer.java b/songdbj/com/jcraft/jogg/Buffer.java
new file mode 100644
index 0000000000..a40a9def9c
--- /dev/null
+++ b/songdbj/com/jcraft/jogg/Buffer.java
@@ -0,0 +1,541 @@
+/* -*-mode:java; c-basic-offset:2; -*- */
+/* JOrbis
+ * Copyright (C) 2000 ymnk, JCraft,Inc.
+ *  
+ * Written by: 2000 ymnk<ymnk@jcraft.com>
+ *   
+ * Many thanks to 
+ *   Monty <monty@xiph.org> 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.jcraft.jogg;
+
+public class Buffer{
+  private static final int BUFFER_INCREMENT=256;
+
+  private static final int[] mask={
+    0x00000000,0x00000001,0x00000003,0x00000007,0x0000000f,
+    0x0000001f,0x0000003f,0x0000007f,0x000000ff,0x000001ff,
+    0x000003ff,0x000007ff,0x00000fff,0x00001fff,0x00003fff,
+    0x00007fff,0x0000ffff,0x0001ffff,0x0003ffff,0x0007ffff,
+    0x000fffff,0x001fffff,0x003fffff,0x007fffff,0x00ffffff,
+    0x01ffffff,0x03ffffff,0x07ffffff,0x0fffffff,0x1fffffff,
+    0x3fffffff,0x7fffffff,0xffffffff
+  };
+
+  int ptr=0;
+  byte[] buffer=null;
+  int endbit=0;
+  int endbyte=0;
+  int storage=0;
+
+  public void writeinit(){
+    buffer=new byte[BUFFER_INCREMENT]; 
+    ptr=0;
+    buffer[0]=(byte)'\0';
+    storage=BUFFER_INCREMENT;
+  }
+
+  public void write(byte[] s){
+    for(int i=0; i<s.length; i++){
+      if(s[i]==0)break;
+      write(s[i],8);
+    }
+  }
+
+  public void read(byte[] s, int bytes){
+    int i=0;
+    while(bytes--!=0){
+      s[i++]=(byte)(read(8));
+    }
+  }
+
+  void reset(){
+    ptr=0;
+    buffer[0]=(byte)'\0';
+    endbit=endbyte=0;
+  }
+
+  public void writeclear(){
+    buffer=null;
+  }
+
+  public void readinit(byte[] buf, int bytes){
+    readinit(buf, 0, bytes);
+  }
+
+  public void readinit(byte[] buf, int start, int bytes){
+//System.err.println("readinit: start="+start+", bytes="+bytes);
+//for(int i=0;i<bytes; i++){
+//System.err.println(i+": "+Integer.toHexString(buf[i+start]));
+//}
+    ptr=start;
+    buffer=buf;
+    endbit=endbyte=0;
+    storage=bytes;
+  }
+
+  public void write(int value, int bits){
+//System.err.println("write: "+Integer.toHexString(value)+", bits="+bits+" ptr="+ptr+", storage="+storage+", endbyte="+endbyte);
+    if(endbyte+4>=storage){
+      byte[] foo=new byte[storage+BUFFER_INCREMENT];
+      System.arraycopy(buffer, 0, foo, 0, storage);
+      buffer=foo;
+      storage+=BUFFER_INCREMENT;
+    }
+
+    value&=mask[bits];
+    bits+=endbit;
+    buffer[ptr]|=(byte)(value<<endbit);
+
+    if(bits>=8){
+      buffer[ptr+1]=(byte)(value>>>(8-endbit));
+      if(bits>=16){
+        buffer[ptr+2]=(byte)(value>>>(16-endbit));  
+        if(bits>=24){
+	  buffer[ptr+3]=(byte)(value>>>(24-endbit));  
+          if(bits>=32){
+	    if(endbit>0)
+	      buffer[ptr+4]=(byte)(value>>>(32-endbit));
+	    else
+	      buffer[ptr+4]=0;
+	  }
+        }
+      }
+    }
+
+    endbyte+=bits/8;
+    ptr+=bits/8;
+    endbit=bits&7;
+  }
+
+  public int look(int bits){
+    int ret;
+    int m=mask[bits];
+
+    bits+=endbit;
+
+//System.err.println("look ptr:"+ptr+", bits="+bits+", endbit="+endbit+", storage="+storage);
+
+    if(endbyte+4>=storage){
+      if(endbyte+(bits-1)/8>=storage)return(-1);
+    }
+  
+    ret=((buffer[ptr])&0xff)>>>endbit;
+//  ret=((byte)(buffer[ptr]))>>>endbit;
+    if(bits>8){
+    ret|=((buffer[ptr+1])&0xff)<<(8-endbit);
+//      ret|=((byte)(buffer[ptr+1]))<<(8-endbit);
+      if(bits>16){
+      ret|=((buffer[ptr+2])&0xff)<<(16-endbit);
+//        ret|=((byte)(buffer[ptr+2]))<<(16-endbit);
+        if(bits>24){
+	  ret|=((buffer[ptr+3])&0xff)<<(24-endbit);
+//System.err.print("ret="+Integer.toHexString(ret)+", ((byte)(buffer[ptr+3]))="+Integer.toHexString(((buffer[ptr+3])&0xff)));
+//	  ret|=((byte)(buffer[ptr+3]))<<(24-endbit);
+//System.err.println(" ->ret="+Integer.toHexString(ret));
+ 	  if(bits>32 && endbit!=0){
+	    ret|=((buffer[ptr+4])&0xff)<<(32-endbit);
+//	    ret|=((byte)(buffer[ptr+4]))<<(32-endbit);
+	  }
+        }
+      }
+    }
+    return(m&ret);
+  }
+
+  public int look1(){
+    if(endbyte>=storage)return(-1);
+    return((buffer[ptr]>>endbit)&1);
+  }
+
+  public void adv(int bits){
+    bits+=endbit;
+    ptr+=bits/8;
+    endbyte+=bits/8;
+    endbit=bits&7;
+  }
+
+  public void adv1(){
+    ++endbit;
+    if(endbit>7){
+      endbit=0;
+      ptr++;
+      endbyte++;
+    }
+  }
+
+  public int read(int bits){
+//System.err.println(this+" read: bits="+bits+", storage="+storage+", endbyte="+endbyte);
+//System.err.println(this+" read: bits="+bits+", storage="+storage+", endbyte="+endbyte+
+//                        ", ptr="+ptr+", endbit="+endbit+", buf[ptr]="+buffer[ptr]);
+
+    int ret;
+    int m=mask[bits];
+
+    bits+=endbit;
+
+    if(endbyte+4>=storage){
+      ret=-1;
+      if(endbyte+(bits-1)/8>=storage){
+        ptr+=bits/8;
+        endbyte+=bits/8;
+        endbit=bits&7;
+        return(ret);
+      }
+    }
+
+/*  
+    ret=(byte)(buffer[ptr]>>>endbit);
+    if(bits>8){
+      ret|=(buffer[ptr+1]<<(8-endbit));  
+      if(bits>16){
+        ret|=(buffer[ptr+2]<<(16-endbit));  
+        if(bits>24){
+	  ret|=(buffer[ptr+3]<<(24-endbit));  
+  	  if(bits>32 && endbit>0){
+  	    ret|=(buffer[ptr+4]<<(32-endbit));
+  	  }
+        }
+      }
+    }
+*/
+    ret=((buffer[ptr])&0xff)>>>endbit;
+    if(bits>8){
+    ret|=((buffer[ptr+1])&0xff)<<(8-endbit);
+//      ret|=((byte)(buffer[ptr+1]))<<(8-endbit);
+      if(bits>16){
+      ret|=((buffer[ptr+2])&0xff)<<(16-endbit);
+//        ret|=((byte)(buffer[ptr+2]))<<(16-endbit);
+        if(bits>24){
+	  ret|=((buffer[ptr+3])&0xff)<<(24-endbit);
+//	  ret|=((byte)(buffer[ptr+3]))<<(24-endbit);
+ 	  if(bits>32 && endbit!=0){
+	    ret|=((buffer[ptr+4])&0xff)<<(32-endbit);
+//	    ret|=((byte)(buffer[ptr+4]))<<(32-endbit);
+	  }
+        }
+      }
+    }
+
+    ret&=m;
+
+    ptr+=bits/8;
+//    ptr=bits/8;
+    endbyte+=bits/8;
+//    endbyte=bits/8;
+    endbit=bits&7;
+    return(ret);
+  }
+
+  public int readB(int bits){
+    //System.err.println(this+" read: bits="+bits+", storage="+storage+", endbyte="+endbyte+
+    //                        ", ptr="+ptr+", endbit="+endbit+", buf[ptr]="+buffer[ptr]);
+    int ret;
+    int m=32-bits;
+
+    bits+=endbit;
+
+    if(endbyte+4>=storage){
+      /* not the main path */
+      ret=-1;
+      if(endbyte*8+bits>storage*8) {
+	ptr+=bits/8;
+	endbyte+=bits/8;
+	endbit=bits&7;
+	return(ret);
+      }
+    }
+
+    ret=(buffer[ptr]&0xff)<<(24+endbit);
+    if(bits>8){
+      ret|=(buffer[ptr+1]&0xff)<<(16+endbit);
+      if(bits>16){
+	ret|=(buffer[ptr+2]&0xff)<<(8+endbit);
+	if(bits>24){
+	  ret|=(buffer[ptr+3]&0xff)<<(endbit);
+	  if(bits>32 && (endbit != 0))
+	    ret|=(buffer[ptr+4]&0xff)>>(8-endbit);
+	}
+      }
+    }
+    ret=(ret>>>(m>>1))>>>((m+1)>>1);
+
+    ptr+=bits/8;
+    endbyte+=bits/8;
+    endbit=bits&7;
+    return(ret);
+  }
+
+  public int read1(){
+    int ret;
+    if(endbyte>=storage){
+      ret=-1;
+      endbit++;
+      if(endbit>7){
+        endbit=0;
+        ptr++;
+        endbyte++;
+      }
+      return(ret);
+    }
+
+    ret=(buffer[ptr]>>endbit)&1;
+
+    endbit++;
+    if(endbit>7){
+      endbit=0;
+      ptr++;
+      endbyte++;
+    }
+    return(ret);
+  }
+
+  public int bytes(){
+    return(endbyte+(endbit+7)/8);
+  }
+
+  public int bits(){
+    return(endbyte*8+endbit);
+  }
+
+  public byte[] buffer(){
+    return(buffer);
+  }
+
+  public static int ilog(int v){
+    int ret=0;
+    while(v>0){
+      ret++;
+      v>>>=1;
+    }
+    return(ret);
+  }
+
+  public static void report(String in){
+    System.err.println(in);
+    System.exit(1);
+  }
+
+  /*
+  static void cliptest(int[] b, int vals, int bits, int[] comp, int compsize){
+    int bytes;
+    byte[] buffer;
+
+    o.reset();
+    for(int i=0;i<vals;i++){
+      o.write(b[i],((bits!=0)?bits:ilog(b[i])));
+    }
+    buffer=o.buffer();
+    bytes=o.bytes();
+System.err.println("cliptest: bytes="+bytes);
+    if(bytes!=compsize)report("wrong number of bytes!\n");
+    for(int i=0;i<bytes;i++){
+      if(buffer[i]!=(byte)comp[i]){
+        for(int j=0;j<bytes;j++){
+          System.err.println(j+": "+Integer.toHexString(buffer[j])+" "+
+                             Integer.toHexString(comp[j]));
+	}
+	report("wrote incorrect value!\n");
+      }
+    }
+System.err.println("bits: "+bits);
+    r.readinit(buffer,bytes);
+    for(int i=0;i<vals;i++){
+      int tbit=(bits!=0)?bits:ilog(b[i]);
+System.err.println(Integer.toHexString(b[i])+" tbit: "+tbit); 
+      if(r.look(tbit)==-1){
+        report("out of data!\n");
+      }
+      if(r.look(tbit)!=(b[i]&mask[tbit])){
+        report(i+" looked at incorrect value! "+Integer.toHexString(r.look(tbit))+", "+Integer.toHexString(b[i]&mask[tbit])+":"+b[i]+" bit="+tbit);
+      }
+      if(tbit==1){
+        if(r.look1()!=(b[i]&mask[tbit])){
+  	  report("looked at single bit incorrect value!\n");
+	}
+      }
+      if(tbit==1){
+        if(r.read1()!=(b[i]&mask[tbit])){
+	  report("read incorrect single bit value!\n");
+	}
+      }
+      else{
+	if(r.read(tbit)!=(b[i]&mask[tbit])){
+	  report("read incorrect value!\n");
+	}
+      }
+    }
+    if(r.bytes()!=bytes){
+      report("leftover bytes after read!\n");
+    }
+  }
+
+  static int[] testbuffer1=
+    {18,12,103948,4325,543,76,432,52,3,65,4,56,32,42,34,21,1,23,32,546,456,7,
+       567,56,8,8,55,3,52,342,341,4,265,7,67,86,2199,21,7,1,5,1,4};
+  static int test1size=43;
+
+  static int[] testbuffer2=
+    {216531625,1237861823,56732452,131,3212421,12325343,34547562,12313212,
+       1233432,534,5,346435231,14436467,7869299,76326614,167548585,
+       85525151,0,12321,1,349528352};
+  static int test2size=21;
+
+  static int[] large=
+    {2136531625,2137861823,56732452,131,3212421,12325343,34547562,12313212,
+       1233432,534,5,2146435231,14436467,7869299,76326614,167548585,
+       85525151,0,12321,1,2146528352};
+
+  static int[] testbuffer3=
+    {1,0,14,0,1,0,12,0,1,0,0,0,1,1,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,1,1,1,1,0,0,1,
+       0,1,30,1,1,1,0,0,1,0,0,0,12,0,11,0,1,0,0,1};
+  static int test3size=56;
+
+  static int onesize=33;
+  static int[] one={146,25,44,151,195,15,153,176,233,131,196,65,85,172,47,40,
+                    34,242,223,136,35,222,211,86,171,50,225,135,214,75,172,
+                    223,4};
+
+  static int twosize=6;
+  static int[] two={61,255,255,251,231,29};
+
+  static int threesize=54;
+  static int[] three={169,2,232,252,91,132,156,36,89,13,123,176,144,32,254,
+                      142,224,85,59,121,144,79,124,23,67,90,90,216,79,23,83,
+                      58,135,196,61,55,129,183,54,101,100,170,37,127,126,10,
+                      100,52,4,14,18,86,77,1};
+
+  static int foursize=38;
+  static int[] four={18,6,163,252,97,194,104,131,32,1,7,82,137,42,129,11,72,
+                     132,60,220,112,8,196,109,64,179,86,9,137,195,208,122,169,
+                     28,2,133,0,1};
+
+  static int fivesize=45;
+  static int[] five={169,2,126,139,144,172,30,4,80,72,240,59,130,218,73,62,
+                     241,24,210,44,4,20,0,248,116,49,135,100,110,130,181,169,
+                     84,75,159,2,1,0,132,192,8,0,0,18,22};
+
+  static int sixsize=7;
+  static int[] six={17,177,170,242,169,19,148};
+
+  static Buffer o=new Buffer();
+  static Buffer r=new Buffer();
+
+  public static void main(String[] arg){
+    byte[] buffer;
+    int bytes;
+//  o=new Buffer();
+//  r=new Buffer();
+
+    o.writeinit();
+
+    System.err.print("\nSmall preclipped packing: ");
+    cliptest(testbuffer1,test1size,0,one,onesize);
+    System.err.print("ok.");
+
+    System.err.print("\nNull bit call: ");
+    cliptest(testbuffer3,test3size,0,two,twosize);
+    System.err.print("ok.");
+
+    System.err.print("\nLarge preclipped packing: ");
+    cliptest(testbuffer2,test2size,0,three,threesize);
+    System.err.print("ok.");
+
+    System.err.print("\n32 bit preclipped packing: ");
+    o.reset();
+    for(int i=0;i<test2size;i++)
+      o.write(large[i],32);
+    buffer=o.buffer();
+    bytes=o.bytes();
+
+
+    r.readinit(buffer,bytes);
+    for(int i=0;i<test2size;i++){
+      if(r.look(32)==-1){
+	report("out of data. failed!");
+      }
+      if(r.look(32)!=large[i]){
+	System.err.print(r.look(32)+" != "+large[i]+" ("+
+                         Integer.toHexString(r.look(32))+"!="+
+                         Integer.toHexString(large[i])+")");
+	report("read incorrect value!\n");
+      }
+      r.adv(32);
+    }
+    if(r.bytes()!=bytes)report("leftover bytes after read!\n");
+    System.err.print("ok.");
+
+    System.err.print("\nSmall unclipped packing: ");
+    cliptest(testbuffer1,test1size,7,four,foursize);
+    System.err.print("ok.");
+
+    System.err.print("\nLarge unclipped packing: ");
+    cliptest(testbuffer2,test2size,17,five,fivesize);
+    System.err.print("ok.");
+
+    System.err.print("\nSingle bit unclicpped packing: ");
+    cliptest(testbuffer3,test3size,1,six,sixsize);
+    System.err.print("ok.");
+
+    System.err.print("\nTesting read past end: ");
+    r.readinit("\0\0\0\0\0\0\0\0".getBytes(),8);
+    for(int i=0;i<64;i++){
+      if(r.read(1)!=0){
+	System.err.print("failed; got -1 prematurely.\n");
+	System.exit(1);
+      }
+    }
+
+    if(r.look(1)!=-1 ||
+       r.read(1)!=-1){
+      System.err.print("failed; read past end without -1.\n");
+      System.exit(1);
+    }
+
+    r.readinit("\0\0\0\0\0\0\0\0".getBytes(),8);
+    if(r.read(30)!=0 || r.read(16)!=0){
+      System.err.print("failed 2; got -1 prematurely.\n");
+    System.exit(1);
+    }
+
+    if(r.look(18)!=0 ||
+       r.look(18)!=0){
+      System.err.print("failed 3; got -1 prematurely.\n");
+      System.exit(1);
+    }
+    if(r.look(19)!=-1 ||
+       r.look(19)!=-1){
+      System.err.print("failed; read past end without -1.\n");
+      System.exit(1);
+    }
+    if(r.look(32)!=-1 ||
+       r.look(32)!=-1){
+      System.err.print("failed; read past end without -1.\n");
+      System.exit(1);
+    }
+    System.err.print("ok.\n\n");
+  }
+  */
+}
+
+
+
+
+
-- 
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