diff options
Diffstat (limited to 'hostTools/lzma/compress/RCDefs.h')
| -rw-r--r-- | hostTools/lzma/compress/RCDefs.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/hostTools/lzma/compress/RCDefs.h b/hostTools/lzma/compress/RCDefs.h new file mode 100644 index 0000000..326f5f3 --- /dev/null +++ b/hostTools/lzma/compress/RCDefs.h @@ -0,0 +1,42 @@ +#ifndef __RCDEFS_H +#define __RCDEFS_H + +#include "AriBitCoder.h" +#include "AriConst.h" + +#define RC_INIT_VAR \ + UINT32 aRange = aRangeDecoder->m_Range; \ + UINT32 aCode = aRangeDecoder->m_Code; + +#define RC_FLUSH_VAR \ + aRangeDecoder->m_Range = aRange; \ + aRangeDecoder->m_Code = aCode; + +#define RC_NORMALIZE \ + if (aRange < NCompression::NArithmetic::kTopValue) \ + { \ + aCode = (aCode << 8) | aRangeDecoder->m_Stream.ReadByte(); \ + aRange <<= 8; } + +#define RC_GETBIT2(aNumMoveBits, aProb, aModelIndex, Action0, Action1) \ + {UINT32 aNewBound = (aRange >> NCompression::NArithmetic::kNumBitModelTotalBits) * aProb; \ + if (aCode < aNewBound) \ + { \ + Action0; \ + aRange = aNewBound; \ + aProb += (NCompression::NArithmetic::kBitModelTotal - aProb) >> aNumMoveBits; \ + aModelIndex <<= 1; \ + } \ + else \ + { \ + Action1; \ + aRange -= aNewBound; \ + aCode -= aNewBound; \ + aProb -= (aProb) >> aNumMoveBits; \ + aModelIndex = (aModelIndex << 1) + 1; \ + }} \ + RC_NORMALIZE + +#define RC_GETBIT(aNumMoveBits, aProb, aModelIndex) RC_GETBIT2(aNumMoveBits, aProb, aModelIndex, ; , ;) + +#endif |