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com.imagero.uio.io
Class BitInputStream  

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          com.imagero.uio.io.BitInputStream

All Implemented Interfaces:

java.io.Closeable

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public class BitInputStream

extends java.io.FilterInputStream

adds ability to read streams bitewise and also to read predefined amount of bits every read() call

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Field Summary
(package private)  int	bitbuf
private  int	bitsToRead
(package private)  int	vbits

 

Fields inherited from class java.io.FilterInputStream

in

 

Constructor Summary

BitInputStream(java.io.InputStream in)

 

Method Summary
private  void	fillBuffer(int nbits)
int	getBitOffset()
int	getBitsToRead()           how much bits is read every read() call (default - 8)
int	read()           Calls the in.read() method
int	read(byte[] b)           Calls the read(byte[], int, int) overloaded method.
int	read(byte[] b, int off, int len)           Reads data from input stream into an byte array.
int	read(int nbits)
void	resetBuffer()           empties bit buffer.
void	setBitsToRead(int bitsToRead)           set how much bits is read every read() call (max 8)
long	skip(long n)           Skips some bytes from the input stream.

 

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, reset

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

vbits

int vbits

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bitbuf

int bitbuf

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bitsToRead

private int bitsToRead

Constructor Detail

BitInputStream

public BitInputStream(java.io.InputStream in)

Method Detail

getBitsToRead

public int getBitsToRead()

how much bits is read every read() call (default - 8)

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setBitsToRead

public void setBitsToRead(int bitsToRead)

set how much bits is read every read() call (max 8)

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read

public int read()
         throws java.io.IOException

Description copied from class: java.io.FilterInputStream

Calls the in.read() method

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read

public int read(int nbits)
         throws java.io.IOException

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read

public int read(byte[] b)
         throws java.io.IOException

Description copied from class: java.io.FilterInputStream

Calls the read(byte[], int, int) overloaded method. Note that this method does not redirect its call directly to a corresponding method in in. This allows subclasses to override only the three argument version of read.

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read

public int read(byte[] b,
                int off,
                int len)
         throws java.io.IOException

Reads data from input stream into an byte array.

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resetBuffer

public void resetBuffer()

empties bit buffer.

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skip

public long skip(long n)
          throws java.io.IOException

Skips some bytes from the input stream. If bit buffer is not empty, n - (vbits + 8) / 8 bytes skipped, then buffer is resetted and filled with same amount of bits as it has before skipping.

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fillBuffer

private void fillBuffer(int nbits)
                 throws java.io.IOException

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getBitOffset

public int getBitOffset()

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