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org.jfor.jfor.tools.jpeg
Class Huffman 
java.lang.Objectorg.jfor.jfor.tools.jpeg.Huffman
- class Huffman
- extends java.lang.Object
This class was modified by James R. Weeks on 3/27/98. It now incorporates Huffman table derivation as in the C jpeg library from the IJG, Jpeg-6a.
| Field Summary | |
private java.lang.Object[] |
AC_matrix
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private java.util.Vector |
bits
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private int[] |
bitsACchrominance
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private int[] |
bitsACluminance
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private int[] |
bitsDCchrominance
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private int[] |
bitsDCluminance
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private int |
bufferPutBits
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private int |
bufferPutBuffer
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private java.lang.Object[] |
DC_matrix
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(package private) static int[] |
jpegNaturalOrder
jpegNaturalOrder[i] is the natural-order position of the i'th element of zigzag order. |
private java.util.Vector |
val
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private int[] |
valACchrominance
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private int[] |
valACluminance
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private int[] |
valDCchrominance
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private int[] |
valDCluminance
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| Constructor Summary | |
(package private) |
Huffman()
The Huffman class constructor. |
| Method Summary | |
(package private) void |
bufferIt(java.io.BufferedOutputStream outStream,
int code,
int size)
Uses an integer long (32 bits) buffer to store the Huffman encoded bits and sends them to outStream by the byte. |
void |
dispose()
Dispose. |
(package private) void |
encodeHuffmanBlock(java.io.BufferedOutputStream outStream,
int[] zigzag,
int prec,
int dCcode,
int aCcode)
HuffmanBlockEncoder run length encodes and Huffman encodes the quantized data. |
(package private) void |
flushBuffer(java.io.BufferedOutputStream outStream)
Flushed the buffer to output stream. |
(package private) int[] |
getBits(int index)
Gets the bits. |
(package private) int[] |
getVal(int index)
Get the values. |
(package private) void |
initHuf()
Initialisation of the Huffman codes for Luminance and Chrominance. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
bufferPutBits
private int bufferPutBits
bufferPutBuffer
private int bufferPutBuffer
DC_matrix
private java.lang.Object[] DC_matrix
AC_matrix
private java.lang.Object[] AC_matrix
bits
private java.util.Vector bits
val
private java.util.Vector val
bitsDCluminance
private int[] bitsDCluminance
valDCluminance
private int[] valDCluminance
bitsDCchrominance
private int[] bitsDCchrominance
valDCchrominance
private int[] valDCchrominance
bitsACluminance
private int[] bitsACluminance
valACluminance
private int[] valACluminance
bitsACchrominance
private int[] bitsACchrominance
valACchrominance
private int[] valACchrominance
jpegNaturalOrder
static int[] jpegNaturalOrder
- jpegNaturalOrder[i] is the natural-order position of the i'th element
of zigzag order.
| Constructor Detail |
Huffman
Huffman()
- The Huffman class constructor.
| Method Detail |
dispose
public void dispose()
- Dispose.
getBits
int[] getBits(int index)
- Gets the bits.
getVal
int[] getVal(int index)
- Get the values.
encodeHuffmanBlock
void encodeHuffmanBlock(java.io.BufferedOutputStream outStream, int[] zigzag, int prec, int dCcode, int aCcode)
- HuffmanBlockEncoder run length encodes and Huffman encodes the quantized
data.
bufferIt
void bufferIt(java.io.BufferedOutputStream outStream, int code, int size)
- Uses an integer long (32 bits) buffer to store the Huffman encoded bits
and sends them to outStream by the byte.
flushBuffer
void flushBuffer(java.io.BufferedOutputStream outStream)
- Flushed the buffer to output stream.
initHuf
void initHuf()
- Initialisation of the Huffman codes for Luminance and Chrominance.
This code results in the same tables created in the IJG Jpeg-6a
library.
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| Home >> All >> org >> jfor >> jfor >> tools >> [ jpeg overview ] | PREV CLASS NEXT CLASS | ||||||||
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SUMMARY: JAVADOC | SOURCE | DOWNLOAD | NESTED | FIELD | CONSTR | METHOD |
DETAIL: FIELD | CONSTR | METHOD | ||||||||