other-licenses/7zstub/src/7zip/Compress/RangeCoder/RangeCoderOpt.h@6474c204b198 (annotated)
other-licenses/7zstub/src/7zip/Compress/RangeCoder/RangeCoderOpt.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Compress/RangeCoder/RangeCoderOpt.h |
| michael@0 | 2 | |
| michael@0 | 3 | #ifndef __COMPRESS_RANGECODER_OPT_H |
| michael@0 | 4 | #define __COMPRESS_RANGECODER_OPT_H |
| michael@0 | 5 | |
| michael@0 | 6 | #define RC_INIT_VAR \ |
| michael@0 | 7 | UInt32 range = rangeDecoder->Range; \ |
| michael@0 | 8 | UInt32 code = rangeDecoder->Code; |
| michael@0 | 9 | |
| michael@0 | 10 | #define RC_FLUSH_VAR \ |
| michael@0 | 11 | rangeDecoder->Range = range; \ |
| michael@0 | 12 | rangeDecoder->Code = code; |
| michael@0 | 13 | |
| michael@0 | 14 | #define RC_NORMALIZE \ |
| michael@0 | 15 | if (range < NCompress::NRangeCoder::kTopValue) \ |
| michael@0 | 16 | { code = (code << 8) | rangeDecoder->Stream.ReadByte(); range <<= 8; } |
| michael@0 | 17 | |
| michael@0 | 18 | #define RC_GETBIT2(numMoveBits, prob, mi, A0, A1) \ |
| michael@0 | 19 | { UInt32 bound = (range >> NCompress::NRangeCoder::kNumBitModelTotalBits) * prob; \ |
| michael@0 | 20 | if (code < bound) \ |
| michael@0 | 21 | { A0; range = bound; \ |
| michael@0 | 22 | prob += (NCompress::NRangeCoder::kBitModelTotal - prob) >> numMoveBits; \ |
| michael@0 | 23 | mi <<= 1; } \ |
| michael@0 | 24 | else \ |
| michael@0 | 25 | { A1; range -= bound; code -= bound; prob -= (prob) >> numMoveBits; \ |
| michael@0 | 26 | mi = (mi + mi) + 1; }} \ |
| michael@0 | 27 | RC_NORMALIZE |
| michael@0 | 28 | |
| michael@0 | 29 | #define RC_GETBIT(numMoveBits, prob, mi) RC_GETBIT2(numMoveBits, prob, mi, ; , ;) |
| michael@0 | 30 | |
| michael@0 | 31 | #endif |
