misc/libphysfs/lzma/CPP/7zip/Compress/RangeCoder/RangeCoderOpt.h
author unc0rr
Mon, 25 Dec 2017 00:58:47 +0100
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// Compress/RangeCoder/RangeCoderOpt.h
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#ifndef __COMPRESS_RANGECODER_OPT_H
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#define __COMPRESS_RANGECODER_OPT_H
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#define RC_INIT_VAR \
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  UInt32 range = rangeDecoder->Range; \
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  UInt32 code = rangeDecoder->Code;        
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#define RC_FLUSH_VAR \
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  rangeDecoder->Range = range; \
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  rangeDecoder->Code = code;
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#define RC_NORMALIZE \
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  if (range < NCompress::NRangeCoder::kTopValue) \
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    { code = (code << 8) | rangeDecoder->Stream.ReadByte(); range <<= 8; }
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#define RC_GETBIT2(numMoveBits, prob, mi, A0, A1) \
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  { UInt32 bound = (range >> NCompress::NRangeCoder::kNumBitModelTotalBits) * prob; \
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  if (code < bound) \
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  { A0; range = bound; \
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    prob += (NCompress::NRangeCoder::kBitModelTotal - prob) >> numMoveBits; \
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    mi <<= 1; } \
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  else \
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  { A1; range -= bound; code -= bound; prob -= (prob) >> numMoveBits; \
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    mi = (mi + mi) + 1; }} \
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  RC_NORMALIZE
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#define RC_GETBIT(numMoveBits, prob, mi) RC_GETBIT2(numMoveBits, prob, mi, ; , ;)
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#endif