diff options
Diffstat (limited to 'payloads/bayou/util/pbuilder/lzma/C/7zip/Compress/RangeCoder/RangeCoderBit.h')
| -rw-r--r-- | payloads/bayou/util/pbuilder/lzma/C/7zip/Compress/RangeCoder/RangeCoderBit.h | 240 |
1 files changed, 120 insertions, 120 deletions
diff --git a/payloads/bayou/util/pbuilder/lzma/C/7zip/Compress/RangeCoder/RangeCoderBit.h b/payloads/bayou/util/pbuilder/lzma/C/7zip/Compress/RangeCoder/RangeCoderBit.h index 64538e6..624f887 100644 --- a/payloads/bayou/util/pbuilder/lzma/C/7zip/Compress/RangeCoder/RangeCoderBit.h +++ b/payloads/bayou/util/pbuilder/lzma/C/7zip/Compress/RangeCoder/RangeCoderBit.h @@ -1,120 +1,120 @@ -// Compress/RangeCoder/RangeCoderBit.h
-
-#ifndef __COMPRESS_RANGECODER_BIT_H
-#define __COMPRESS_RANGECODER_BIT_H
-
-#include "RangeCoder.h"
-
-namespace NCompress {
-namespace NRangeCoder {
-
-const int kNumBitModelTotalBits = 11;
-const UInt32 kBitModelTotal = (1 << kNumBitModelTotalBits);
-
-const int kNumMoveReducingBits = 2;
-
-const int kNumBitPriceShiftBits = 6;
-const UInt32 kBitPrice = 1 << kNumBitPriceShiftBits;
-
-class CPriceTables
-{
-public:
- static UInt32 ProbPrices[kBitModelTotal >> kNumMoveReducingBits];
- static void Init();
- CPriceTables();
-};
-
-template <int numMoveBits>
-class CBitModel
-{
-public:
- UInt32 Prob;
- void UpdateModel(UInt32 symbol)
- {
- /*
- Prob -= (Prob + ((symbol - 1) & ((1 << numMoveBits) - 1))) >> numMoveBits;
- Prob += (1 - symbol) << (kNumBitModelTotalBits - numMoveBits);
- */
- if (symbol == 0)
- Prob += (kBitModelTotal - Prob) >> numMoveBits;
- else
- Prob -= (Prob) >> numMoveBits;
- }
-public:
- void Init() { Prob = kBitModelTotal / 2; }
-};
-
-template <int numMoveBits>
-class CBitEncoder: public CBitModel<numMoveBits>
-{
-public:
- void Encode(CEncoder *encoder, UInt32 symbol)
- {
- /*
- encoder->EncodeBit(this->Prob, kNumBitModelTotalBits, symbol);
- this->UpdateModel(symbol);
- */
- UInt32 newBound = (encoder->Range >> kNumBitModelTotalBits) * this->Prob;
- if (symbol == 0)
- {
- encoder->Range = newBound;
- this->Prob += (kBitModelTotal - this->Prob) >> numMoveBits;
- }
- else
- {
- encoder->Low += newBound;
- encoder->Range -= newBound;
- this->Prob -= (this->Prob) >> numMoveBits;
- }
- if (encoder->Range < kTopValue)
- {
- encoder->Range <<= 8;
- encoder->ShiftLow();
- }
- }
- UInt32 GetPrice(UInt32 symbol) const
- {
- return CPriceTables::ProbPrices[
- (((this->Prob - symbol) ^ ((-(int)symbol))) & (kBitModelTotal - 1)) >> kNumMoveReducingBits];
- }
- UInt32 GetPrice0() const { return CPriceTables::ProbPrices[this->Prob >> kNumMoveReducingBits]; }
- UInt32 GetPrice1() const { return CPriceTables::ProbPrices[(kBitModelTotal - this->Prob) >> kNumMoveReducingBits]; }
-};
-
-
-template <int numMoveBits>
-class CBitDecoder: public CBitModel<numMoveBits>
-{
-public:
- UInt32 Decode(CDecoder *decoder)
- {
- UInt32 newBound = (decoder->Range >> kNumBitModelTotalBits) * this->Prob;
- if (decoder->Code < newBound)
- {
- decoder->Range = newBound;
- this->Prob += (kBitModelTotal - this->Prob) >> numMoveBits;
- if (decoder->Range < kTopValue)
- {
- decoder->Code = (decoder->Code << 8) | decoder->Stream.ReadByte();
- decoder->Range <<= 8;
- }
- return 0;
- }
- else
- {
- decoder->Range -= newBound;
- decoder->Code -= newBound;
- this->Prob -= (this->Prob) >> numMoveBits;
- if (decoder->Range < kTopValue)
- {
- decoder->Code = (decoder->Code << 8) | decoder->Stream.ReadByte();
- decoder->Range <<= 8;
- }
- return 1;
- }
- }
-};
-
-}}
-
-#endif
+// Compress/RangeCoder/RangeCoderBit.h + +#ifndef __COMPRESS_RANGECODER_BIT_H +#define __COMPRESS_RANGECODER_BIT_H + +#include "RangeCoder.h" + +namespace NCompress { +namespace NRangeCoder { + +const int kNumBitModelTotalBits = 11; +const UInt32 kBitModelTotal = (1 << kNumBitModelTotalBits); + +const int kNumMoveReducingBits = 2; + +const int kNumBitPriceShiftBits = 6; +const UInt32 kBitPrice = 1 << kNumBitPriceShiftBits; + +class CPriceTables +{ +public: + static UInt32 ProbPrices[kBitModelTotal >> kNumMoveReducingBits]; + static void Init(); + CPriceTables(); +}; + +template <int numMoveBits> +class CBitModel +{ +public: + UInt32 Prob; + void UpdateModel(UInt32 symbol) + { + /* + Prob -= (Prob + ((symbol - 1) & ((1 << numMoveBits) - 1))) >> numMoveBits; + Prob += (1 - symbol) << (kNumBitModelTotalBits - numMoveBits); + */ + if (symbol == 0) + Prob += (kBitModelTotal - Prob) >> numMoveBits; + else + Prob -= (Prob) >> numMoveBits; + } +public: + void Init() { Prob = kBitModelTotal / 2; } +}; + +template <int numMoveBits> +class CBitEncoder: public CBitModel<numMoveBits> +{ +public: + void Encode(CEncoder *encoder, UInt32 symbol) + { + /* + encoder->EncodeBit(this->Prob, kNumBitModelTotalBits, symbol); + this->UpdateModel(symbol); + */ + UInt32 newBound = (encoder->Range >> kNumBitModelTotalBits) * this->Prob; + if (symbol == 0) + { + encoder->Range = newBound; + this->Prob += (kBitModelTotal - this->Prob) >> numMoveBits; + } + else + { + encoder->Low += newBound; + encoder->Range -= newBound; + this->Prob -= (this->Prob) >> numMoveBits; + } + if (encoder->Range < kTopValue) + { + encoder->Range <<= 8; + encoder->ShiftLow(); + } + } + UInt32 GetPrice(UInt32 symbol) const + { + return CPriceTables::ProbPrices[ + (((this->Prob - symbol) ^ ((-(int)symbol))) & (kBitModelTotal - 1)) >> kNumMoveReducingBits]; + } + UInt32 GetPrice0() const { return CPriceTables::ProbPrices[this->Prob >> kNumMoveReducingBits]; } + UInt32 GetPrice1() const { return CPriceTables::ProbPrices[(kBitModelTotal - this->Prob) >> kNumMoveReducingBits]; } +}; + + +template <int numMoveBits> +class CBitDecoder: public CBitModel<numMoveBits> +{ +public: + UInt32 Decode(CDecoder *decoder) + { + UInt32 newBound = (decoder->Range >> kNumBitModelTotalBits) * this->Prob; + if (decoder->Code < newBound) + { + decoder->Range = newBound; + this->Prob += (kBitModelTotal - this->Prob) >> numMoveBits; + if (decoder->Range < kTopValue) + { + decoder->Code = (decoder->Code << 8) | decoder->Stream.ReadByte(); + decoder->Range <<= 8; + } + return 0; + } + else + { + decoder->Range -= newBound; + decoder->Code -= newBound; + this->Prob -= (this->Prob) >> numMoveBits; + if (decoder->Range < kTopValue) + { + decoder->Code = (decoder->Code << 8) | decoder->Stream.ReadByte(); + decoder->Range <<= 8; + } + return 1; + } + } +}; + +}} + +#endif |
