com.adobe.internal.io.stream

Class BitInputStream

java.lang.Object

com.adobe.internal.io.stream.BitInputStream

public class BitInputStream
extends Object

This class reads bit by bit data from a back-end stream which is passed in constructor.

Constructor Summary

Constructors

Constructor and Description
BitInputStream(InputStream stream) Constructor for this stream.

Method Summary

Modifier and Type	Method and Description
int	available() This method returns approximate number of bits which are available to read.
void	close() Releases the resources hold by this instance.
int	read() Reads next 1 bit of available data.
int	read(byte[] b, int bitsPerValue, int length) This method breaks the back-end stream into data samples each having "bitsPerValue" number of bits and writes length number of samples to the byte array passed.
int	read(int nob) Reads nob number of bits from available data and returns an integer value.
int	read(int[] b, int bitsPerValue, int length) This method breaks the back-end stream into data samples each having "bitsPerValue" number of bits and writes length number of samples to the byte array passed.
long	skip(long n) This method skips n number of bits from available data.

Methods inherited from class java.lang.Object

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

Constructor Detail

BitInputStream

public BitInputStream(InputStream stream)
               throws IOException

Constructor for this stream.

Parameters:

stream - This stream is used as back-end stream to read bit by bit data.

Throws:

IOException

Method Detail

read

public int read(int nob)
         throws IOException

Reads nob number of bits from available data and returns an integer value. Throws IOException if end of stream has been reached.

Parameters:

nob -

Returns:

int

Throws:

IOException

read

public int read()
         throws IOException

Reads next 1 bit of available data. Throws IOException if end of stream has been reached.

Throws:

IOException

close

public void close()
           throws IOException

Releases the resources hold by this instance.

Throws:

IOException

skip

public long skip(long n)
          throws IOException

This method skips n number of bits from available data.

Throws:

IOException

read

public int read(byte[] b,
                int bitsPerValue,
                int length)

This method breaks the back-end stream into data samples each having "bitsPerValue" number of bits and writes length number of samples to the byte array passed. Throws an exception if bitsPerValue is greater than 8 OR byte array passed null OR it's length < "length" Returns the number of values actually written to the byte array.

Parameters:

b -

bitsPerValue -

Returns:

int

read

public int read(int[] b,
                int bitsPerValue,
                int length)

This method breaks the back-end stream into data samples each having "bitsPerValue" number of bits and writes length number of samples to the byte array passed. Throws an exception if byte array passed null OR it's length < "length" Returns the number of values actually written to the byte array.

Parameters:

b -

bitsPerValue -

Returns:

int

available

public int available()
              throws IOException

This method returns approximate number of bits which are available to read. Actual number of bits may be more than the count returned by this method but not less than that.

Returns:

int

Throws:

IOException