1 /* 2 =============================================================================== 3 4 FILE: field_byte14.hpp 5 6 CONTENTS: 7 8 9 PROGRAMMERS: 10 11 martin.isenburg@rapidlasso.com - http://rapidlasso.com 12 uday.karan@gmail.com - Hobu, Inc. 13 14 COPYRIGHT: 15 16 (c) 2007-2014, martin isenburg, rapidlasso - tools to catch reality 17 (c) 2014, Uday Verma, Hobu, Inc. 18 19 This is free software; you can redistribute and/or modify it under the 20 terms of the GNU Lesser General Licence as published by the Free Software 21 Foundation. See the COPYING file for more information. 22 23 This software is distributed WITHOUT ANY WARRANTY and without even the 24 implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 25 26 CHANGE HISTORY: 27 28 =============================================================================== 29 */ 30 31 namespace lazperf 32 { 33 namespace detail 34 { 35 36 class Byte14Base 37 { 38 protected: 39 struct ChannelCtx 40 { 41 int have_last_; 42 las::byte14 last_; 43 std::vector<models::arithmetic> byte_model_; 44 ChannelCtxlazperf::detail::Byte14Base::ChannelCtx45 ChannelCtx(size_t count) : have_last_(false), last_(count), 46 byte_model_(count, models::arithmetic(256)) 47 {} 48 }; 49 50 public: 51 size_t count() const; 52 53 protected: 54 Byte14Base(size_t count); 55 56 size_t count_; 57 int last_channel_; 58 std::array<ChannelCtx, 4> chan_ctxs_; 59 std::vector<decoders::arithmetic<MemoryStream>> byte_dec_; 60 }; 61 62 class Byte14Compressor : public Byte14Base 63 { 64 public: 65 Byte14Compressor(OutCbStream& stream, size_t count); 66 67 void writeSizes(); 68 void writeData(); 69 const char *compress(const char *buf, int& sc); 70 71 private: 72 OutCbStream& stream_; 73 std::vector<bool> valid_; 74 std::vector<encoders::arithmetic<MemoryStream>> byte_enc_; 75 }; 76 77 class Byte14Decompressor : public Byte14Base 78 { 79 public: 80 Byte14Decompressor(InCbStream& stream, size_t count); 81 82 void dumpSums(); 83 void readSizes(); 84 void readData(); 85 char *decompress(char *buf, int& sc); 86 87 private: 88 InCbStream& stream_; 89 std::vector<uint32_t> byte_cnt_; 90 std::vector<decoders::arithmetic<MemoryStream>> byte_dec_; 91 utils::Summer sumByte; 92 }; 93 94 } // namespace detail 95 } // namespace lazperf 96