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This commit is contained in:
Igor Pavlov
2005-05-30 00:00:00 +00:00
committed by Kornel Lesiński
parent 8c1b5c7b7e
commit 3c510ba80b
926 changed files with 40559 additions and 23519 deletions
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60
7zip/Compress/Huffman/HuffmanEncoder.h
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@@ -1,7 +1,5 @@
// Compression/HuffmanEncoder.h
#pragma once
#ifndef __COMPRESSION_HUFFMANENCODER_H
#define __COMPRESSION_HUFFMANENCODER_H
@@ -10,54 +8,58 @@
namespace NCompression {
namespace NHuffman {
const int kNumBitsInLongestCode = 15;
const int kNumBitsInLongestCode = 20;
struct CItem
{
UINT32 Freq;
UINT32 Code;
UINT32 Dad;
UINT32 Len;
UInt32 Freq;
UInt32 Code;
UInt32 Dad;
UInt32 Len;
};
class CEncoder
{
UINT32 m_NumSymbols; // number of symbols in adwSymbol
public:
UInt32 m_NumSymbols; // number of symbols in adwSymbol
CItem *m_Items;
UINT32 *m_Heap;
UINT32 m_HeapSize;
BYTE *m_Depth;
const BYTE *m_ExtraBits;
UINT32 m_ExtraBase;
UINT32 m_MaxLength;
UInt32 *m_Heap;
UInt32 m_HeapSize;
Byte *m_Depth;
const Byte *m_ExtraBits;
UInt32 m_ExtraBase;
UInt32 m_MaxLength;
UINT32 m_HeapLength;
UINT32 m_BitLenCounters[kNumBitsInLongestCode + 1];
UInt32 m_HeapLength;
UInt32 m_BitLenCounters[kNumBitsInLongestCode + 1];
UINT32 RemoveSmallest();
UInt32 RemoveSmallest();
bool Smaller(int n, int m);
void DownHeap(UINT32 k);
void GenerateBitLen(UINT32 maxCode, UINT32 heapMax);
void GenerateCodes(UINT32 maxCode);
void DownHeap(UInt32 k);
void GenerateBitLen(UInt32 maxCode, UInt32 heapMax);
void GenerateCodes(UInt32 maxCode);
UINT32 m_BlockBitLength;
UInt32 m_BlockBitLength;
void Free();
public:
CEncoder(UINT32 numSymbols, const BYTE *extraBits,
UINT32 extraBase, UINT32 maxLength);
CEncoder();
~CEncoder();
bool Create(UInt32 numSymbols, const Byte *extraBits,
UInt32 extraBase, UInt32 maxLength);
void StartNewBlock();
void AddSymbol(UINT32 symbol)
{ m_Items[symbol].Freq++; }
void AddSymbol(UInt32 symbol) { m_Items[symbol].Freq++; }
void SetFreqs(const UINT32 *freqs);
void BuildTree(BYTE *levels);
UINT32 GetBlockBitLength() const { return m_BlockBitLength; }
void SetFreqs(const UInt32 *freqs);
void BuildTree(Byte *levels);
UInt32 GetBlockBitLength() const { return m_BlockBitLength; }
template <class TBitEncoder>
void CodeOneValue(TBitEncoder *bitEncoder, UINT32 symbol)
void CodeOneValue(TBitEncoder *bitEncoder, UInt32 symbol)
{ bitEncoder->WriteBits(m_Items[symbol].Code, m_Items[symbol].Len); }
};