1 // Compress/RangeCoder/RangeCoderOpt.h
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3 #ifndef __COMPRESS_RANGECODER_OPT_H
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4 #define __COMPRESS_RANGECODER_OPT_H
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6 #define RC_INIT_VAR \
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7 UInt32 range = rangeDecoder->Range; \
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8 UInt32 code = rangeDecoder->Code;
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10 #define RC_FLUSH_VAR \
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11 rangeDecoder->Range = range; \
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12 rangeDecoder->Code = code;
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14 #define RC_NORMALIZE \
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15 if (range < NCompress::NRangeCoder::kTopValue) \
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16 { code = (code << 8) | rangeDecoder->Stream.ReadByte(); range <<= 8; }
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18 #define RC_GETBIT2(numMoveBits, prob, mi, A0, A1) \
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19 { UInt32 bound = (range >> NCompress::NRangeCoder::kNumBitModelTotalBits) * prob; \
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21 { A0; range = bound; \
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22 prob += (NCompress::NRangeCoder::kBitModelTotal - prob) >> numMoveBits; \
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25 { A1; range -= bound; code -= bound; prob -= (prob) >> numMoveBits; \
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26 mi = (mi + mi) + 1; }} \
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29 #define RC_GETBIT(numMoveBits, prob, mi) RC_GETBIT2(numMoveBits, prob, mi, ; , ;)
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