michael@0: // Compress/RangeCoder/RangeCoderOpt.h
michael@0: 
michael@0: #ifndef __COMPRESS_RANGECODER_OPT_H
michael@0: #define __COMPRESS_RANGECODER_OPT_H
michael@0: 
michael@0: #define RC_INIT_VAR \
michael@0:   UInt32 range = rangeDecoder->Range; \
michael@0:   UInt32 code = rangeDecoder->Code;        
michael@0: 
michael@0: #define RC_FLUSH_VAR \
michael@0:   rangeDecoder->Range = range; \
michael@0:   rangeDecoder->Code = code;
michael@0: 
michael@0: #define RC_NORMALIZE \
michael@0:   if (range < NCompress::NRangeCoder::kTopValue) \
michael@0:     { code = (code << 8) | rangeDecoder->Stream.ReadByte(); range <<= 8; }
michael@0: 
michael@0: #define RC_GETBIT2(numMoveBits, prob, mi, A0, A1) \
michael@0:   { UInt32 bound = (range >> NCompress::NRangeCoder::kNumBitModelTotalBits) * prob; \
michael@0:   if (code < bound) \
michael@0:   { A0; range = bound; \
michael@0:     prob += (NCompress::NRangeCoder::kBitModelTotal - prob) >> numMoveBits; \
michael@0:     mi <<= 1; } \
michael@0:   else \
michael@0:   { A1; range -= bound; code -= bound; prob -= (prob) >> numMoveBits; \
michael@0:     mi = (mi + mi) + 1; }} \
michael@0:   RC_NORMALIZE
michael@0: 
michael@0: #define RC_GETBIT(numMoveBits, prob, mi) RC_GETBIT2(numMoveBits, prob, mi, ; , ;)
michael@0: 
michael@0: #endif