LSBChanger

java.lang.Object
- steganography.audio.LSBChanger

```
public class LSBChanger
extends java.lang.Object
```
This class can read from and write to the least significant bits of a byte array.

Author:

Richard Rudek

Constructor Summary

Constructors
Constructor Description

LSBChanger(AudioOverlay overlay)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`byte[]`	`decode(int length)`	Reads a message from this overlays byte array until length bytes have been read.
`byte[]`	`encode(byte[] message)`	Takes the byte array message and writes the message into the least significant bits of the byte array carrier using the overlay given in the constructor. If the message is null, nothing will change.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - LSBChanger
```
public LSBChanger(AudioOverlay overlay)
```
- Method Detail
  - encode
```
public byte[] encode(byte[] message)
              throws AudioCapacityException
```
    Takes the byte array message and writes the message into the least significant bits of the byte array carrier using the overlay given in the constructor.
    If the message is null, nothing will change.
    
    Parameters:
    
    message - bytes to encode
    
    Returns:
    
    the given byte array with the message encoded into the least significant bits
    
    Throws:
    
    AudioCapacityException - if the message does not fit into the overlays bytes
  - decode
```
public byte[] decode(int length)
              throws UnknownStegFormatException
```
    Reads a message from this overlays byte array until length bytes have been read.
    
    Parameters:
    
    length - amount of bytes in the message
    
    Returns:
    
    the message as a byte array
    
    Throws:
    
    UnknownStegFormatException - if there are not enough bytes to read the message from
    
    java.lang.IllegalArgumentException - if the length is less than 1