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Diffstat (limited to 'songdbj/de/jarnbjo/util/io/ByteArrayBitInputStream.java')
-rw-r--r--songdbj/de/jarnbjo/util/io/ByteArrayBitInputStream.java352
1 files changed, 0 insertions, 352 deletions
diff --git a/songdbj/de/jarnbjo/util/io/ByteArrayBitInputStream.java b/songdbj/de/jarnbjo/util/io/ByteArrayBitInputStream.java
deleted file mode 100644
index 9c84c7d..0000000
--- a/songdbj/de/jarnbjo/util/io/ByteArrayBitInputStream.java
+++ /dev/null
@@ -1,352 +0,0 @@
-/*
- * $ProjectName$
- * $ProjectRevision$
- * -----------------------------------------------------------
- * $Id$
- * -----------------------------------------------------------
- *
- * $Author$
- *
- * Description:
- *
- * Copyright 2002-2003 Tor-Einar Jarnbjo
- * -----------------------------------------------------------
- *
- * Change History
- * -----------------------------------------------------------
- * $Log$
- * Revision 1.1 2005/07/11 15:42:36 hcl
- * Songdb java version, source. only 1.5 compatible
- *
- * Revision 1.1.1.1 2004/04/04 22:09:12 shred
- * First Import
- *
- * Revision 1.3 2003/04/10 19:48:31 jarnbjo
- * no message
- *
- * Revision 1.2 2003/03/16 01:11:39 jarnbjo
- * no message
- *
- * Revision 1.1 2003/03/03 21:02:20 jarnbjo
- * no message
- *
- */
-
-package de.jarnbjo.util.io;
-
-import java.io.IOException;
-
-/**
- * Implementation of the <code>BitInputStream</code> interface,
- * using a byte array as data source.
-*/
-
-public class ByteArrayBitInputStream implements BitInputStream {
-
- private byte[] source;
- private byte currentByte;
-
- private int endian;
-
- private int byteIndex=0;
- private int bitIndex=0;
-
- public ByteArrayBitInputStream(byte[] source) {
- this(source, LITTLE_ENDIAN);
- }
-
- public ByteArrayBitInputStream(byte[] source, int endian) {
- this.endian=endian;
- this.source=source;
- currentByte=source[0];
- bitIndex=(endian==LITTLE_ENDIAN)?0:7;
- }
-
- public boolean getBit() throws IOException {
- if(endian==LITTLE_ENDIAN) {
- if(bitIndex>7) {
- bitIndex=0;
- currentByte=source[++byteIndex];
- }
- return (currentByte&(1<<(bitIndex++)))!=0;
- }
- else {
- if(bitIndex<0) {
- bitIndex=7;
- currentByte=source[++byteIndex];
- }
- return (currentByte&(1<<(bitIndex--)))!=0;
- }
- }
-
- public int getInt(int bits) throws IOException {
- if(bits>32) {
- throw new IllegalArgumentException("Argument \"bits\" must be <= 32");
- }
- int res=0;
- if(endian==LITTLE_ENDIAN) {
- for(int i=0; i<bits; i++) {
- if(getBit()) {
- res|=(1<<i);
- }
- }
- }
- else {
- if(bitIndex<0) {
- bitIndex=7;
- currentByte=source[++byteIndex];
- }
- if(bits<=bitIndex+1) {
- int ci=((int)currentByte)&0xff;
- int offset=1+bitIndex-bits;
- int mask=((1<<bits)-1)<<offset;
- res=(ci&mask)>>offset;
- bitIndex-=bits;
- }
- else {
- res=(((int)currentByte)&0xff&((1<<(bitIndex+1))-1))<<(bits-bitIndex-1);
- bits-=bitIndex+1;
- currentByte=source[++byteIndex];
- while(bits>=8) {
- bits-=8;
- res|=(((int)source[byteIndex])&0xff)<<bits;
- currentByte=source[++byteIndex];
- }
- if(bits>0) {
- int ci=((int)source[byteIndex])&0xff;
- res|=(ci>>(8-bits))&((1<<bits)-1);
- bitIndex=7-bits;
- }
- else {
- currentByte=source[--byteIndex];
- bitIndex=-1;
- }
- }
- }
-
- return res;
- }
-
- public int getSignedInt(int bits) throws IOException {
- int raw=getInt(bits);
- if(raw>=1<<(bits-1)) {
- raw-=1<<bits;
- }
- return raw;
- }
-
- public int getInt(HuffmanNode root) throws IOException {
- while(root.value==null) {
- if(bitIndex>7) {
- bitIndex=0;
- currentByte=source[++byteIndex];
- }
- root=(currentByte&(1<<(bitIndex++)))!=0?root.o1:root.o0;
- }
- return root.value.intValue();
- }
-
- public long getLong(int bits) throws IOException {
- if(bits>64) {
- throw new IllegalArgumentException("Argument \"bits\" must be <= 64");
- }
- long res=0;
- if(endian==LITTLE_ENDIAN) {
- for(int i=0; i<bits; i++) {
- if(getBit()) {
- res|=(1L<<i);
- }
- }
- }
- else {
- for(int i=bits-1; i>=0; i--) {
- if(getBit()) {
- res|=(1L<<i);
- }
- }
- }
- return res;
- }
-
- /**
- * <p>reads an integer encoded as "signed rice" as described in
- * the FLAC audio format specification</p>
- *
- * <p><b>not supported for little endian</b></p>
- *
- * @param order
- * @return the decoded integer value read from the stream
- *
- * @throws IOException if an I/O error occurs
- * @throws UnsupportedOperationException if the method is not supported by the implementation
- */
-
- public int readSignedRice(int order) throws IOException {
-
- int msbs=-1, lsbs=0, res=0;
-
- if(endian==LITTLE_ENDIAN) {
- // little endian
- throw new UnsupportedOperationException("ByteArrayBitInputStream.readSignedRice() is only supported in big endian mode");
- }
- else {
- // big endian
-
- byte cb=source[byteIndex];
- do {
- msbs++;
- if(bitIndex<0) {
- bitIndex=7;
- byteIndex++;
- cb=source[byteIndex];
- }
- } while((cb&(1<<bitIndex--))==0);
-
- int bits=order;
-
- if(bitIndex<0) {
- bitIndex=7;
- byteIndex++;
- }
- if(bits<=bitIndex+1) {
- int ci=((int)source[byteIndex])&0xff;
- int offset=1+bitIndex-bits;
- int mask=((1<<bits)-1)<<offset;
- lsbs=(ci&mask)>>offset;
- bitIndex-=bits;
- }
- else {
- lsbs=(((int)source[byteIndex])&0xff&((1<<(bitIndex+1))-1))<<(bits-bitIndex-1);
- bits-=bitIndex+1;
- byteIndex++;
- while(bits>=8) {
- bits-=8;
- lsbs|=(((int)source[byteIndex])&0xff)<<bits;
- byteIndex++;
- }
- if(bits>0) {
- int ci=((int)source[byteIndex])&0xff;
- lsbs|=(ci>>(8-bits))&((1<<bits)-1);
- bitIndex=7-bits;
- }
- else {
- byteIndex--;
- bitIndex=-1;
- }
- }
-
- res=(msbs<<order)|lsbs;
- }
-
- return (res&1)==1?-(res>>1)-1:(res>>1);
- }
-
- /**
- * <p>fills the array from <code>offset</code> with <code>len</code>
- * integers encoded as "signed rice" as described in
- * the FLAC audio format specification</p>
- *
- * <p><b>not supported for little endian</b></p>
- *
- * @param order
- * @param buffer
- * @param offset
- * @param len
- * @return the decoded integer value read from the stream
- *
- * @throws IOException if an I/O error occurs
- * @throws UnsupportedOperationException if the method is not supported by the implementation
- */
-
- public void readSignedRice(int order, int[] buffer, int off, int len) throws IOException {
-
- if(endian==LITTLE_ENDIAN) {
- // little endian
- throw new UnsupportedOperationException("ByteArrayBitInputStream.readSignedRice() is only supported in big endian mode");
- }
- else {
- // big endian
- for(int i=off; i<off+len; i++) {
-
- int msbs=-1, lsbs=0;
-
- byte cb=source[byteIndex];
- do {
- msbs++;
- if(bitIndex<0) {
- bitIndex=7;
- byteIndex++;
- cb=source[byteIndex];
- }
- } while((cb&(1<<bitIndex--))==0);
-
- int bits=order;
-
- if(bitIndex<0) {
- bitIndex=7;
- byteIndex++;
- }
- if(bits<=bitIndex+1) {
- int ci=((int)source[byteIndex])&0xff;
- int offset=1+bitIndex-bits;
- int mask=((1<<bits)-1)<<offset;
- lsbs=(ci&mask)>>offset;
- bitIndex-=bits;
- }
- else {
- lsbs=(((int)source[byteIndex])&0xff&((1<<(bitIndex+1))-1))<<(bits-bitIndex-1);
- bits-=bitIndex+1;
- byteIndex++;
- while(bits>=8) {
- bits-=8;
- lsbs|=(((int)source[byteIndex])&0xff)<<bits;
- byteIndex++;
- }
- if(bits>0) {
- int ci=((int)source[byteIndex])&0xff;
- lsbs|=(ci>>(8-bits))&((1<<bits)-1);
- bitIndex=7-bits;
- }
- else {
- byteIndex--;
- bitIndex=-1;
- }
- }
-
- int res=(msbs<<order)|lsbs;
- buffer[i]=(res&1)==1?-(res>>1)-1:(res>>1);
- }
- }
- }
-
- public void align() {
- if(endian==BIG_ENDIAN && bitIndex>=0) {
- bitIndex=7;
- byteIndex++;
- }
- else if(endian==LITTLE_ENDIAN && bitIndex<=7) {
- bitIndex=0;
- byteIndex++;
- }
- }
-
- public void setEndian(int endian) {
- if(this.endian==BIG_ENDIAN && endian==LITTLE_ENDIAN) {
- bitIndex=0;
- byteIndex++;
- }
- else if(this.endian==LITTLE_ENDIAN && endian==BIG_ENDIAN) {
- bitIndex=7;
- byteIndex++;
- }
- this.endian=endian;
- }
-
- /**
- * @return the byte array used as a source for this instance
- */
-
- public byte[] getSource() {
- return source;
- }
-} \ No newline at end of file
generated by cgit v1.1 at 2026-04-26 19:11:48 +0000