32 lines
953 B
C
32 lines
953 B
C
// 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
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