The Tor Browser / file comparison
comparison: other-licenses/7zstub/src/7zip/Compress/RangeCoder/RangeCoderOpt.h
other-licenses/7zstub/src/7zip/Compress/RangeCoder/RangeCoderOpt.h
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:c568e458cbdc |
|---|---|
| 1 // Compress/RangeCoder/RangeCoderOpt.h | |
| 2 | |
| 3 #ifndef __COMPRESS_RANGECODER_OPT_H | |
| 4 #define __COMPRESS_RANGECODER_OPT_H | |
| 5 | |
| 6 #define RC_INIT_VAR \ | |
| 7 UInt32 range = rangeDecoder->Range; \ | |
| 8 UInt32 code = rangeDecoder->Code; | |
| 9 | |
| 10 #define RC_FLUSH_VAR \ | |
| 11 rangeDecoder->Range = range; \ | |
| 12 rangeDecoder->Code = code; | |
| 13 | |
| 14 #define RC_NORMALIZE \ | |
| 15 if (range < NCompress::NRangeCoder::kTopValue) \ | |
| 16 { code = (code << 8) | rangeDecoder->Stream.ReadByte(); range <<= 8; } | |
| 17 | |
| 18 #define RC_GETBIT2(numMoveBits, prob, mi, A0, A1) \ | |
| 19 { UInt32 bound = (range >> NCompress::NRangeCoder::kNumBitModelTotalBits) * prob; \ | |
| 20 if (code < bound) \ | |
| 21 { A0; range = bound; \ | |
| 22 prob += (NCompress::NRangeCoder::kBitModelTotal - prob) >> numMoveBits; \ | |
| 23 mi <<= 1; } \ | |
| 24 else \ | |
| 25 { A1; range -= bound; code -= bound; prob -= (prob) >> numMoveBits; \ | |
| 26 mi = (mi + mi) + 1; }} \ | |
| 27 RC_NORMALIZE | |
| 28 | |
| 29 #define RC_GETBIT(numMoveBits, prob, mi) RC_GETBIT2(numMoveBits, prob, mi, ; , ;) | |
| 30 | |
| 31 #endif |
