Documentation
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Overview ¶
Package huffman contains jbig2 huffman tables used to decode jbig2 encoded data segments.
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type BasicTabler ¶
type BasicTabler interface {
HtHigh() int32
HtLow() int32
StreamReader() reader.StreamReader
HtPS() int32
HtRS() int32
HtOOB() int32
}
BasicTabler is the interface common for the huffman tables.
type Code ¶
type Code struct {
// contains filtered or unexported fields
}
Code is the model for the huffman table code.
func NewCode ¶
NewCode creates new huffman code.
type EncodedTable ¶
type EncodedTable struct {
BasicTabler
// contains filtered or unexported fields
}
EncodedTable is a model for the encoded huffman table.
func NewEncodedTable ¶
func NewEncodedTable(table BasicTabler) (*EncodedTable, error)
NewEncodedTable creates new encoded table from the provided 'table' argument.
func (*EncodedTable) Decode ¶
func (e *EncodedTable) Decode(r reader.StreamReader) (int64, error)
Decode implenets Node interface.
func (*EncodedTable) InitTree ¶
func (e *EncodedTable) InitTree(codeTable []*Code) error
InitTree implements Tabler interface.
func (*EncodedTable) RootNode ¶
func (e *EncodedTable) RootNode() *InternalNode
RootNode Implements Tabler interface.
func (*EncodedTable) String ¶
func (e *EncodedTable) String() string
String implements Stringer interface.
type FixedSizeTable ¶
type FixedSizeTable struct {
// contains filtered or unexported fields
}
FixedSizeTable defines the table with the fixed size.
func NewFixedSizeTable ¶
func NewFixedSizeTable(codeTable []*Code) (*FixedSizeTable, error)
NewFixedSizeTable creates new fixedSizeTable.
func (*FixedSizeTable) Decode ¶
func (f *FixedSizeTable) Decode(r reader.StreamReader) (int64, error)
Decode implements Tabler interface.
func (*FixedSizeTable) InitTree ¶
func (f *FixedSizeTable) InitTree(codeTable []*Code) error
InitTree implements Tabler interface.
func (*FixedSizeTable) RootNode ¶
func (f *FixedSizeTable) RootNode() *InternalNode
RootNode implements Tabler interface.
func (*FixedSizeTable) String ¶
func (f *FixedSizeTable) String() string
String implements Stringer interface.
type InternalNode ¶
type InternalNode struct {
// contains filtered or unexported fields
}
InternalNode represents an internal node of a huffman tree. It is defined as a pair of two child nodes 'zero' and 'one' and a 'depth' level. Implements Node interface.
func (*InternalNode) Decode ¶
func (i *InternalNode) Decode(r reader.StreamReader) (int64, error)
Decode implements Node interface.
func (*InternalNode) String ¶
func (i *InternalNode) String() string
String implements the Stringer interface.
type Node ¶
type Node interface {
Decode(r reader.StreamReader) (int64, error)
String() string
}
Node is the interface defined for all huffman tree nodes.
type OutOfBandNode ¶
type OutOfBandNode struct{}
OutOfBandNode represents an out of band node in a huffman tree.
func (*OutOfBandNode) Decode ¶
func (o *OutOfBandNode) Decode(r reader.StreamReader) (int64, error)
Decode implements Node interface. Decodes the out of band node by returning max int64 value.
func (*OutOfBandNode) String ¶
func (o *OutOfBandNode) String() string
String implements the Stringer interface returns the max int binary value.
type StandardTable ¶
type StandardTable struct {
// contains filtered or unexported fields
}
StandardTable is the structure that defines standard jbig2 table.
func (*StandardTable) Decode ¶
func (s *StandardTable) Decode(r reader.StreamReader) (int64, error)
Decode implements Node interface.
func (*StandardTable) InitTree ¶
func (s *StandardTable) InitTree(codeTable []*Code) error
InitTree implements Tabler interface.
func (*StandardTable) RootNode ¶
func (s *StandardTable) RootNode() *InternalNode
RootNode implements Tabler interface.
func (*StandardTable) String ¶
func (s *StandardTable) String() string
String implements Stringer interface.
type Tabler ¶
type Tabler interface {
Decode(r reader.StreamReader) (int64, error)
InitTree(codeTable []*Code) error
String() string
RootNode() *InternalNode
}
Tabler is the interface for all types of the huffman tables.
Source Files