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java.lang.Objectcz.cuni.jagrlib.DefaultProperty
cz.cuni.jagrlib.Piece
cz.cuni.jagrlib.piece.ZigZagCodec
public class ZigZagCodec
Zig-zag block coding. Used as back-end in block transform compression methods of raster 2D data.
Field Summary | |
---|---|
protected static java.lang.String |
CATEGORY
Object category. |
protected EntropyCodec |
codec
Actual entropy codec (accelerator). |
protected static int |
CTX_SKIP
Context number for zero-skipping. |
protected static int |
CTX_VALUE
Context number for non-zero values encoding. |
protected int |
height
Actual block height in samples. |
protected java.lang.StringBuffer |
logSb
StringBuffer for logging purposes. |
static RegPiece |
reg
Static registration instance for this class. |
protected static java.lang.String |
TEMPLATE_NAME
Object template identifier. |
protected int |
variant
Actual codec variant (not used yet). |
protected int |
width
Actual block width in samples. |
Fields inherited from class cz.cuni.jagrlib.Piece |
---|
channels, info, pl, plugs, TEMPLATE_TYPE, userBreak |
Fields inherited from interface cz.cuni.jagrlib.iface.Property |
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LOGGING, STATISTICS, TEXT_DESCRIPTION |
Constructor Summary | |
---|---|
ZigZagCodec()
|
Method Summary | |
---|---|
int |
decode(int[] data,
int[][] predict)
Block decoding. |
void |
encode(int[] data,
int[][] predict)
Block coding. |
protected int |
findNonzero(int[] data,
int[] pos)
Finds next non-zero number, alters pos, returns CTX_SKIP -encoded value. |
java.lang.Object |
get(java.lang.String key)
Gets the given property. |
void |
init()
Prepares the underlying EntropyCodec . |
boolean |
loadData(byte[] data)
Loads instance parameters from (previously stored) binary data. |
void |
set(java.lang.String key,
java.lang.Object value)
Sets the given property. |
void |
setBlockSize(int width,
int height)
Sets actual block size. |
static int |
setTemplate(Template t,
int ord)
General-purpose registration routine. |
int |
setVariant(int variant)
Set actual codec variant (context). |
protected boolean |
step(int[] pos)
Performs one step, returns true if succeeded. |
protected boolean |
step(int[] pos,
int size)
Performs step of the given size, returns true if succeeded. |
byte[] |
storeData()
Pack instance parameters into binary format. |
Methods inherited from class cz.cuni.jagrlib.Piece |
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className, connect, findPlug, findPlug, getInfo, getInterface, getInterface, getPlug, getReg, init, isCompatible, isCompatible, isConnected, logError, logWarning, myInterface, newInputPlug, newOptOutputPlug, newOutputPlug, newPlug, noTemplates, propBegin, propBounds, propDefault, propEnd, propEnum, propManipulator, propManipulator, setProgressListener, setRegStrings, setTemplateDynamic, stop |
Methods inherited from class cz.cuni.jagrlib.DefaultProperty |
---|
booleanProperty, booleanProperty, colorDoubleProperty, colorProperty, commit, doubleProperty, doubleProperty, doubleProperty, enumProperty, floatProperty, floatProperty, floatProperty, intProperty, intProperty, intProperty, longProperty, longProperty, longProperty, set, stringProperty |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface cz.cuni.jagrlib.iface.Property |
---|
commit |
Field Detail |
---|
protected int variant
protected int width
protected int height
protected EntropyCodec codec
protected java.lang.StringBuffer logSb
StringBuffer
for logging purposes.
Property.LOGGING
protected static final int CTX_VALUE
protected static final int CTX_SKIP
protected static final java.lang.String TEMPLATE_NAME
protected static final java.lang.String CATEGORY
public static final RegPiece reg
Constructor Detail |
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public ZigZagCodec()
Method Detail |
---|
protected final boolean step(int[] pos)
true
if succeeded.
protected final boolean step(int[] pos, int size)
true
if succeeded.
protected final int findNonzero(int[] data, int[] pos)
CTX_SKIP
-encoded value.
public void init() throws java.io.IOException
EntropyCodec
.
Should be called before any of encode(int[], int[][])
s or decode(int[], int[][])
s.
init
in interface BlockCodec
java.io.IOException
public int setVariant(int variant)
EntropyCodec
too.
setVariant
in interface BlockCodec
variant
- Variant number (from 0).
setBlockSize(int, int)
public void setBlockSize(int width, int height) throws java.io.IOException
setBlockSize
in interface BlockCodec
width
- Horizontal block size (1D block size).height
- Vertical block size (1 for 1D).
java.io.IOException
setVariant(int)
public void encode(int[] data, int[][] predict) throws java.io.IOException
EntropyCodec
input.
Connected EntropyCodec
module will be feeded by them.
encode
in interface BlockCodec
data
- Source data to be encoded.predict
- Pre-allocated array used for predicition passing.
predict[1] will be used as source, predict[0] is filled with
prediction for the next block[s]. Can be null
.
java.io.IOException
decode(int[], int[][])
public int decode(int[] data, int[][] predict) throws java.io.IOException
EntropyCodec
and converts them back into
given integer matrix.
decode
in interface BlockCodec
data
- Target data array (pre-allocated to sufficient size).predict
- Pre-allocated array used for predicition passing.
predict[1] will be used as source, predict[0] is filled with
prediction for the next block[s]. Can be null
.
java.io.IOException
encode(int[], int[][])
public byte[] storeData()
storeData
in interface PersistentParamsBinary
null
.
The array can be shared by all method calls.loadData(byte[])
public boolean loadData(byte[] data)
loadData
in interface PersistentParamsBinary
data
- Binary data to be interpreted. Can be null
.
true
if successful.storeData()
public void set(java.lang.String key, java.lang.Object value)
set
in interface Property
set
in class DefaultProperty
key
- Key string.value
- The new value.Property.commit()
public java.lang.Object get(java.lang.String key)
get
in interface Property
get
in class DefaultProperty
key
- Key string.
null
.public static int setTemplate(Template t, int ord)
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