Class RLEDecompressingInputStream

  • All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable

    public class RLEDecompressingInputStream
    extends java.io.InputStream
    Wrapper of InputStream which provides Run Length Encoding (RLE) decompression on the fly. Uses MS-OVBA decompression algorithm. See http://download.microsoft.com/download/2/4/8/24862317-78F0-4C4B-B355-C7B2C1D997DB/[MS-OVBA].pdf
    • Constructor Summary

      Constructors 
      Constructor Description
      RLEDecompressingInputStream​(java.io.InputStream in)
      Creates a new wrapper RLE Decompression InputStream.
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int available()  
      void close()  
      static byte[] decompress​(byte[] compressed)  
      static byte[] decompress​(byte[] compressed, int offset, int length)  
      int read()  
      int read​(byte[] b)  
      int read​(byte[] b, int off, int l)  
      int readInt()
      Convenience method for read a 4-bytes int in little endian encoding.
      int readShort()
      Convenience method for read a 2-bytes short in little endian encoding.
      long skip​(long n)  
      • Methods inherited from class java.io.InputStream

        mark, markSupported, nullInputStream, readAllBytes, readNBytes, readNBytes, reset, transferTo
      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • RLEDecompressingInputStream

        public RLEDecompressingInputStream​(java.io.InputStream in)
                                    throws java.io.IOException
        Creates a new wrapper RLE Decompression InputStream.
        Parameters:
        in - The stream to wrap with the RLE Decompression
        Throws:
        java.io.IOException
    • Method Detail

      • read

        public int read()
                 throws java.io.IOException
        Specified by:
        read in class java.io.InputStream
        Throws:
        java.io.IOException
      • read

        public int read​(byte[] b)
                 throws java.io.IOException
        Overrides:
        read in class java.io.InputStream
        Throws:
        java.io.IOException
      • read

        public int read​(byte[] b,
                        int off,
                        int l)
                 throws java.io.IOException
        Overrides:
        read in class java.io.InputStream
        Throws:
        java.io.IOException
      • skip

        public long skip​(long n)
                  throws java.io.IOException
        Overrides:
        skip in class java.io.InputStream
        Throws:
        java.io.IOException
      • available

        public int available()
        Overrides:
        available in class java.io.InputStream
      • close

        public void close()
                   throws java.io.IOException
        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable
        Overrides:
        close in class java.io.InputStream
        Throws:
        java.io.IOException
      • readShort

        public int readShort()
                      throws java.io.IOException
        Convenience method for read a 2-bytes short in little endian encoding.
        Returns:
        short value from the stream, -1 if end of stream is reached
        Throws:
        java.io.IOException
      • readInt

        public int readInt()
                    throws java.io.IOException
        Convenience method for read a 4-bytes int in little endian encoding.
        Returns:
        integer value from the stream, -1 if end of stream is reached
        Throws:
        java.io.IOException
      • decompress

        public static byte[] decompress​(byte[] compressed)
                                 throws java.io.IOException
        Throws:
        java.io.IOException
      • decompress

        public static byte[] decompress​(byte[] compressed,
                                        int offset,
                                        int length)
                                 throws java.io.IOException
        Throws:
        java.io.IOException